CN107907185A - Material-level detection system and its application method in a kind of burning hopper - Google Patents
Material-level detection system and its application method in a kind of burning hopper Download PDFInfo
- Publication number
- CN107907185A CN107907185A CN201711418790.5A CN201711418790A CN107907185A CN 107907185 A CN107907185 A CN 107907185A CN 201711418790 A CN201711418790 A CN 201711418790A CN 107907185 A CN107907185 A CN 107907185A
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- hopper
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- signal
- detection system
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- 239000000463 material Substances 0.000 title claims abstract description 125
- 238000001514 detection method Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000000523 sample Substances 0.000 claims abstract description 38
- 238000002310 reflectometry Methods 0.000 claims abstract description 29
- 238000005259 measurement Methods 0.000 claims abstract description 19
- 239000002184 metal Substances 0.000 claims abstract description 5
- 238000001914 filtration Methods 0.000 claims description 41
- 230000005540 biological transmission Effects 0.000 claims description 31
- 238000009434 installation Methods 0.000 claims description 4
- 230000008054 signal transmission Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims 1
- 239000007769 metal material Substances 0.000 abstract description 4
- 241000196324 Embryophyta Species 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000011900 installation process Methods 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000002592 echocardiography Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009331 sowing Methods 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/296—Acoustic waves
- G01F23/2965—Measuring attenuation of transmitted waves
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- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Incineration Of Waste (AREA)
Abstract
The invention discloses a kind of material-level detection system and its application method burned in hopper, which includes hopper and material-level measure is popped one's head in；The hopper is the funnel-shaped container of pointed end, its top is provided with opening；The hopper inner wall of the hopper is metal；The material-level measure probe is arranged on the oblique upper of the hopper, hopper inner wall of the material-level measure probe towards the hopper；The material-level measure probe is used for the interior wall emission signal beam to the hopper, and the material position in the hopper is determined according to the signal strength of the reflected beam of the hopper inner wall.It is an advantage of the invention that reflectivity material low from house refuse, plant haulm etc. is different, the hopper inner wall of metal material has reflectivity that is stronger and stablizing for signal beam；By detect the circumstance of occlusion of hopper inner wall detect hopper in material position, can it is faint to avoid low reflectivity material reflectivity and it is unstable caused by measurement error.
Description
Technical field
The invention belongs to field of environment protection equipment, and in particular to a kind of material-level detection system burned in hopper and its user
Method.
Background technology
The existing many ripe prior arts of detection of material position in container, such as radar, ultrasonic wave, laser, capacitance, stifled
Turn, weight, radioactive ray etc., but be on the whole all used for the material-level measure of solid particle or liquid.It is above-mentioned according to current market statistics
The measurement result of detection technique is generally inaccurate.
Using electromagnetic wave or the material of ultrasound examination principle, big multi-surface is required for a fine and close reflecting surface.And
There are many objects, such as the loose uneven refining such as plant stem, rubbish, material surface does not possess the reflecting surface of densification, enters ripple most
High-rise surface of material has reflection, and continuing traveling downwardly by top stop, does not encounter lower surface of material, and reflected
Return part, the part of this part back wave can be stopped that reflection not gone back by top material.Lower floor is more arrived, back wave is got over
Easily it is blocked.Therefore, the rubbish only close to surface of material could return some echoes with not high reflective.Due to thing
The inhomogeneities of material, same material is high, and the change of back wave can be very big, this will substantially reduce the reliability of detection, lead to not
Intensity according to back wave accurately measures material position.
In waste incineration field, the material position height of incinerator charge door should keep relative stability, too low to cause stove fire from material
Bucket is scurried out, and triggers accident.It is excessive to cause putty.In incinerator auto feed pattern, the material-level measure control of charge door
It is particularly important that, can be directly related to auto feed realize or the safety of system, direct motion.
The content of the invention
According to the deficiencies of the prior art described above, It is an object of the present invention to provide a kind of material-level measure burned in hopper
System and its application method, the detecting system by measure metal material hopper inner wall occlusion state and then calculate discharge bucket
Interior material position, solves the problems, such as that low reflectivity material reflection wave strength is difficult to determine.
The object of the invention is realized and completed by following technical scheme：
A kind of material-level detection system in burning hopper, the material-level detection system includes hopper and material-level measure is popped one's head in；Institute
The funnel-shaped container that hopper is pointed end is stated, its top is provided with opening；The hopper inner wall of the hopper is metal；The material
Position detection probe is arranged on the oblique upper of the hopper, hopper inner wall of the material-level measure probe towards the hopper；It is described
Material-level measure probe is used for the interior wall emission signal beam to the hopper, and the letter of the reflected beam according to the hopper inner wall
Number intensity determines the material position in the hopper.
The beam transmission direction that the material-level measure probe is sent is vertical with the hopper inner wall, and its angle positive and negative deviation≤
30°。
The hopper is used to accommodate low reflectivity material.
The material-level measure probe includes beam transmission module and reflected beam receiving module；The reflected beam receives
Module includes sequentially connected beam signal modular converter, window filtering module and reflected beam strength measurement module；It is described
Window filtering module is used to filter out the reflected beam received too early or too late.
The beam transmission module is ultrasonic wave transmitting module, and the beam signal modular converter is ultrasonic receiver；
Pass through clock signal synchronization between the beam transmission module and the window filtering module.
The beam transmission module is radio wave transmission module；The radio wave that the beam transmission module is launched
Output is to the window filtering module, so that the window filtering module and the beam transmission module synchronize.
A kind of application method of material-level detection system in burning hopper, the described method comprises the following steps：Material position is examined
Probing head is installed to the oblique upper of hopper；Demarcate the opening time and shut-in time of the window filtering module；Every pre- timing
Between material position in the hopper is detected using material-level measure probe.
The opening time and shut-in time for demarcating the window filtering module comprise the following steps：According to the signal beam
Spread speed, the hopper inner wall geomery and material-level measure probe the distance between with described hopper inner wall
The signal beam is calculated to pop one's head in the maximum propagation time between the hopper inner wall and most brief biography from the material-level measure
Between sowing time；Using twice of the maximum propagation time shut-in time as the window filtering module, by the minimum propagation time
Twice of opening time as the window filtering module.
The material position in the hopper, which is detected, using material-level measure probe specifically includes following steps：The material-level measure
The beam transmission module of probe signal beam described in wall emission into the hopper, the signal beam by hopper inner wall and
The reflected beam is formed after the reflection of the low reflectivity material in the hopper；Beam signal modular converter will be described anti-
Ejected wave beam is converted to electric signal, and is transmitted to the window filtering module；The window filtering module is to the reflected beam
Electric signal is filtered, and by filtered electric signal transmission to reflected beam strength measurement module；The reflected beam intensity
The intensity of measurement module reflected beam according to filtered electric signal measurement, and determined according to the intensity of the reflected beam
Material position in the hopper.
It is an advantage of the invention that reflectivity material low from house refuse, plant haulm etc. is different, in the hopper of metal material
Wall has reflectivity that is stronger and stablizing for signal beam；Detected by detecting the circumstance of occlusion of hopper inner wall in hopper
Material position, can it is faint to avoid low reflectivity material reflectivity and it is unstable caused by measurement error.
Brief description of the drawings
Fig. 1 is the structure diagram for the material-level detection system that the present invention is burned in hopper；
Fig. 2 is the structure diagram that material-level measure is popped one's head in the embodiment of the present invention 1；
Fig. 3 is the structure diagram that material-level measure is popped one's head in the embodiment of the present invention 2.
Embodiment
The feature of the present invention and other correlated characteristics are described in further detail by embodiment below in conjunction with attached drawing, with
Easy to the understanding of technical staff of the same trade：
Such as Fig. 1-3, mark 1-10 is respectively in figure：Hopper 1, material-level measure probe 2, hopper inner wall 3, low reflectivity material 4,
Beam transmission module 5, reflected beam receiving module 6, beam signal modular converter 7, window filtering module 8, reflected beam intensity
Measurement module 9, timing module 10.
Embodiment 1：As shown in Figure 1, the present embodiment is more particularly to a kind of material-level detection system burned in hopper, the system
Including hopper 1 and material-level measure probe 2；Hopper 1 is the funnel-shaped container of pointed end, for accommodating low reflectivity material；
The hopper inner wall 3 of hopper 1 is metal；The oblique upper that material-level measure probe 2 is arranged on hopper 1, material-level measure probe 2 is towards hopper
1 hopper inner wall 3；Material-level measure probe 2 is used to launch signal beam to the hopper inner wall 3 of hopper 1, and according to hopper inner wall 3
The signal strength of reflected beam determine the material position of low reflectivity material 4 in hopper 1.
As shown in Figure 1, 2, material-level measure probe 2 includes beam transmission module 5 and reflected beam receiving module 6；Reflection
Wave beam receiving module 6 includes sequentially connected beam signal modular converter 7, window filtering module 8 and reflected beam intensity and surveys
Measure module 9；The beam transmission module 5 of material-level measure probe 2 is used to launch signal beam to the hopper inner wall 3 of hopper 1, in this reality
Apply in example, beam transmission module 5 is radio wave transmission module, and the signal beam sent is electromagnetic wave, the wavelength of signal beam
Positioned at millimere-wave band.
As shown in Figure 1, 2, there is stronger reflectivity, metal for the signal beam in millimere-wave band, hopper inner wall 3
The hopper inner wall 3 of material is up to 95% to 98% for the reflectivity of millimeter wave；But the low reflectivity material 4 accommodated in hopper 1
2 signal beams that send of material-level measure probe can almost be fully absorbed, this cause low reflectivity material 4 for signal beam compared with
It is low；Therefore the material position in hopper 1 is higher, and the area that hopper inner wall 3 is blocked by low reflectivity material 4 is bigger, signal beam it is anti-
The signal strength of ejected wave beam is with regard to smaller；According to above-mentioned characteristic, by the signal strength for detecting reflected beam, you can obtain discharge bucket 1
The material position of interior low reflectivity material 4；In the present embodiment, low reflectivity material 4 is flammable house refuse.
As shown in Figure 1, 2, except hopper inner wall 3, the object on hopper periphery also can reflected signal wave beam, since position is different
The reflected beam of these objects is mostly advanced or lags behind the reflected beam of hopper inner wall 3；In order to avoid these are advanced or hysteresis
Reflected signal measurement result is impacted, window filtering module 8 can be used to receive beam signal modular converter 7
Reflected beam is filtered, and filters out advanced or hysteresis reflection；Window filtering module 8 includes opening time and shut-in time,
Reflected beam between propagation time and shut-in time can enter reflected beam ionization meter by window filtering module 8
Module 9.
As shown in Figure 1, 2, visited by the spread speed of signal beam, the geomery of hopper inner wall 3 and material-level measure
First 2 installation site can calculate maximum propagation distance and most of the signal beam from material-level measure probe 2 to hopper inner wall 3
Small distance, and then calculate the maximum propagation time tmax of signal beam and minimum propagation time tmin；During by maximum propagation
Between twice of tmax as the shut-in time, can be effective using minimum propagation time tmin as opening time, window filtering module 8
Ground filters out advanced or hysteresis reflected beam.
As shown in Figure 1, 2, run simultaneously for the ease of window filtering module 8 and beam transmission module 5, beam transmission module
5 radio waves launched are exported to the window filtering module 8；After beam transmission module 5 sends signal beam, window
Filter module 8 starts timing；After chronometric data is more than the opening time, window filtering module 8 connects beam signal modular converter 7
Received reflected beam is forwarded to reflected beam strength measurement module 9；After chronometric data is more than the shut-in time, window filtering mould
The reflected beam that beam signal modular converter 7 stops receiving is forwarded to reflected beam strength measurement module 9 by block 8.
As shown in Figure 1, 2, the present embodiment further relates to a kind of application method for burning the material-level detection system in hopper, the party
Method specifically includes following steps：
1）By 2 installation of material-level measure probe to the oblique upper of hopper 1；In installation process, material-level measure probe 2 cannot be located at material
The surface of bucket 1, to prevent material-level measure probe 2 from hindering grab bucket to launch low reflectivity material out of upper direction hopper of the hopper 1
4；In addition also need to ensure that the beam transmission direction of material-level measure probe 2 is as far as possible vertical with hopper inner wall 3 in installation process.
2）Demarcate the opening time and shut-in time of window filtering module 8；In calibration process, pass through signal beam first
The installation site of spread speed, the geomery of hopper inner wall 3 and material-level measure probe 2 calculates signal beam and is examined from material position
The maximum propagation distance and minimum range of hopper inner wall 3 are arrived in probing first 2；Then according to maximum propagation distance and minimum range
Calculate the maximum propagation time tmax of signal beam and minimum propagation time tmin；By twice of maximum propagation time tmax
As the shut-in time, using minimum propagation time tmin as the opening time, window filtering module 8 can effectively filter out in advance
Or the reflected beam of hysteresis.
3）At predetermined time intervals, using the material position in 2 detection hopper 1 of material-level measure probe；Detection process specifically include with
Lower step：The beam transmission module 5 of material-level measure probe 2 launches signal beam to hopper inner wall 3, and signal beam is by hopper
Reflected beam is formed after the reflection of low reflectivity material 4 in wall 3 and hopper 1；Beam signal modular converter 7 is by reflected beam
Be converted to electric signal, and by transformed electric signal transmission to window filtering module 8；Window filtering module 8 is to reflected beam
Electric signal is filtered, and by filtered electric signal transmission to reflected beam strength measurement module 9；Reflected beam ionization meter
Module 9 determines the material in hopper 1 according to the intensity of filtered electric signal measurement reflected beam according to the intensity of reflected beam
Position.
The advantageous effects of the present embodiment are：Reflectivity material low from house refuse, plant haulm etc. is different, metal material
The hopper inner wall of matter has reflectivity that is stronger and stablizing for signal beam；By detect the circumstance of occlusion of hopper inner wall and then
Detect hopper in material position, can it is faint to avoid low reflectivity material reflectivity and it is unstable caused by measurement error.
Embodiment 2：As shown in Figure 1,3, the main distinction of the present embodiment and embodiment 1 is in signal beam in this present embodiment
Using ultrasonic wave rather than electromagnetic wave；In specific the present embodiment, beam transmission module 5 is ultrasonic wave transmitting module, beam signal
Modular converter 7 is ultrasonic receiver；The structure and scaling method of window filtering module 8 are same as Example 1；In the present embodiment
Beam transmission module 5 is respectively connected with a timing module 10 with window filtering module 8；Timing module 10 is spaced the scheduled time, together
When to beam transmission module 5 and window filtering module 8 send trigger signal；After beam transmission module 5 receives trigger signal,
Launch signal beam to hopper inner wall 3 immediately；At the same time, window filtering module 8 immediately begins to timing, and according to embodiment 1
In method reflected beam is filtered；The method of work of reflected beam strength measurement module 9 is same as Example 1.
Claims (9)
1. a kind of material-level detection system burned in hopper, it is characterised in that the material-level detection system includes hopper and material position
Detection probe；The hopper is the funnel-shaped container of pointed end, its top is provided with opening；The hopper inner wall of the hopper is
Metal；The material-level measure probe is arranged on the oblique upper of the hopper, material of the material-level measure probe towards the hopper
Struggle against inner wall；The material-level measure probe is used for the interior wall emission signal beam to the hopper, and according to the hopper inner wall
The signal strength of reflected beam determines the material position in the hopper.
A kind of 2. material-level detection system burned in hopper according to claim 1, it is characterised in that the material-level measure
The beam transmission direction that probe is sent is vertical with the hopper inner wall, its angle positive and negative deviation≤30 °.
3. a kind of material-level detection system burned in hopper according to claim 1, it is characterised in that the hopper is used for
Accommodate low reflectivity material.
A kind of 4. material-level detection system burned in hopper according to claim 1, it is characterised in that the material-level measure
Probe includes beam transmission module and reflected beam receiving module；The reflected beam receiving module includes sequentially connected ripple
Beam signal conversion module, window filtering module and reflected beam strength measurement module；The window filtering module is used to filter out
The reflected beam received too early or too late.
A kind of 5. material-level detection system burned in hopper according to claim 4, it is characterised in that the beam transmission
Module is ultrasonic wave transmitting module, and the beam signal modular converter is ultrasonic receiver；The beam transmission module and institute
State and pass through clock signal synchronization between window filtering module.
A kind of 6. material-level detection system burned in hopper according to claim 4, it is characterised in that the beam transmission
Module is radio wave transmission module；The radio wave that the beam transmission module is launched is exported to the window filtering mould
Block, so that the window filtering module and the beam transmission module synchronize.
7. a kind of be related to any application method for burning the material-level detection system in hopper in claim 1 to 6, it is special
Sign is the described method comprises the following steps：By material-level measure probe installation to the oblique upper of hopper；Demarcate the window filtering
The opening time and shut-in time of module；The material in the hopper is detected using material-level measure probe at predetermined time intervals
Position.
A kind of 8. application method for burning the material-level detection system in hopper according to claim 7, it is characterised in that mark
The opening time and shut-in time of the fixed window filtering module comprise the following steps：According to the propagation of signal beam speed
Degree, the geomery of the hopper inner wall and the material-level measure are popped one's head in described in the calculating of the distance between described hopper inner wall
Signal beam is popped one's head in the maximum propagation time between the hopper inner wall and minimum propagation time from the material-level measure；Will
Shut-in time of twice of maximum propagation time as the window filtering module, using twice of the minimum propagation time as
The opening time of the window filtering module.
9. a kind of application method for burning the material-level detection system in hopper according to claim 8, it is characterised in that make
The material position in the hopper, which is detected, with material-level measure probe specifically includes following steps：The wave beam of the material-level measure probe
Transmitting module signal beam described in wall emission into the hopper, the signal beam is by hopper inner wall and the hopper
The low reflectivity material reflection after form the reflected beam；Beam signal modular converter changes the reflected beam
For electric signal, and it is transmitted to the window filtering module；The window filtering module carries out the electric signal of the reflected beam
Filtering, and by filtered electric signal transmission to reflected beam strength measurement module；The reflected beam strength measurement module root
Determined according to the intensity of reflected beam described in filtered electric signal measurement, and according to the intensity of the reflected beam in the hopper
Material position.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711418790.5A CN107907185B (en) | 2017-12-25 | 2017-12-25 | Material level detection system in incineration hopper and application method thereof |
| PCT/CN2018/122947 WO2019128889A1 (en) | 2017-12-25 | 2018-12-22 | Level detection system for incineration hopper, and method for using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711418790.5A CN107907185B (en) | 2017-12-25 | 2017-12-25 | Material level detection system in incineration hopper and application method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107907185A true CN107907185A (en) | 2018-04-13 |
| CN107907185B CN107907185B (en) | 2024-04-05 |
Family
ID=61871130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711418790.5A Active CN107907185B (en) | 2017-12-25 | 2017-12-25 | Material level detection system in incineration hopper and application method thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107907185B (en) |
| WO (1) | WO2019128889A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019128889A1 (en) * | 2017-12-25 | 2019-07-04 | 上海昂丰装备科技有限公司 | Level detection system for incineration hopper, and method for using same |
| CN115421131A (en) * | 2022-11-04 | 2022-12-02 | 北京锐达仪表有限公司 | Equivalent multi-position dead-angle-free electromagnetic wave 3D scanning radar and material measuring method |
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|---|---|---|---|---|
| JPH08178732A (en) * | 1994-12-27 | 1996-07-12 | Nittetsu Mining Co Ltd | Method and apparatus for detecting level using laser light |
| JP2000283443A (en) * | 1999-03-29 | 2000-10-13 | Mitsubishi Heavy Ind Ltd | Device and method for measuring refuse layer in refuse incinerator |
| CN102322920A (en) * | 2011-08-24 | 2012-01-18 | 四川大学 | Method for measuring existence of powdery materials in specific material position of container and implementation material level switch thereof |
| CN103376145A (en) * | 2012-04-24 | 2013-10-30 | 克洛纳测量技术有限公司 | Method for determining the fill level of a medium and corresponding apparatus |
| CN105403286A (en) * | 2015-12-21 | 2016-03-16 | 上海云鱼智能科技有限公司 | Electromagnetic wave node level indicator |
| CN208043191U (en) * | 2017-12-25 | 2018-11-02 | 上海昂丰装备科技有限公司 | A kind of material-level detection system in burning hopper |
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| US4470299A (en) * | 1982-01-04 | 1984-09-11 | Fischer & Porter Company | Ultrasonic liquid level meter |
| CN201463986U (en) * | 2009-05-26 | 2010-05-12 | 唐山建龙实业有限公司 | Improved ultrasonic material level measuring device |
| CN206365487U (en) * | 2016-12-14 | 2017-08-01 | 宁波中瑞生物科技有限公司 | A kind of soybean extruding-puffing machine |
| CN107907185B (en) * | 2017-12-25 | 2024-04-05 | 上海昂丰装备科技有限公司 | Material level detection system in incineration hopper and application method thereof |
-
2017
- 2017-12-25 CN CN201711418790.5A patent/CN107907185B/en active Active
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2018
- 2018-12-22 WO PCT/CN2018/122947 patent/WO2019128889A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08178732A (en) * | 1994-12-27 | 1996-07-12 | Nittetsu Mining Co Ltd | Method and apparatus for detecting level using laser light |
| JP2000283443A (en) * | 1999-03-29 | 2000-10-13 | Mitsubishi Heavy Ind Ltd | Device and method for measuring refuse layer in refuse incinerator |
| CN102322920A (en) * | 2011-08-24 | 2012-01-18 | 四川大学 | Method for measuring existence of powdery materials in specific material position of container and implementation material level switch thereof |
| CN103376145A (en) * | 2012-04-24 | 2013-10-30 | 克洛纳测量技术有限公司 | Method for determining the fill level of a medium and corresponding apparatus |
| CN105403286A (en) * | 2015-12-21 | 2016-03-16 | 上海云鱼智能科技有限公司 | Electromagnetic wave node level indicator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019128889A1 (en) * | 2017-12-25 | 2019-07-04 | 上海昂丰装备科技有限公司 | Level detection system for incineration hopper, and method for using same |
| CN115421131A (en) * | 2022-11-04 | 2022-12-02 | 北京锐达仪表有限公司 | Equivalent multi-position dead-angle-free electromagnetic wave 3D scanning radar and material measuring method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019128889A1 (en) | 2019-07-04 |
| CN107907185B (en) | 2024-04-05 |
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