JP4773395B2 - Static elimination performance detector - Google Patents

Description

  The present invention relates to a static elimination performance detector that detects the performance of a static eliminator.

Conventionally, there are techniques described in the following Patent Documents 1 to 5 as techniques for examining the performance of the static eliminator.
<Patent Document 1 (Japanese Patent Laid-Open No. 11-271372)>
It consists of a probe unit with a probe at the tip and a built-in charge amount measurement unit, and a calculation / display unit connected to the outside. The probe contacts the charged object and inputs the charge to the charge amount measurement unit. The charge measuring unit is connected between the switch, the resistor connected to the switch, the operational amplifier having one input connected to the resistor, and one input terminal and the other input terminal of the operational amplifier. The calculation / display unit calculates the charge amount based on the output of the operational amplifier output as a voltage with respect to the other input terminal of the operational amplifier, and displays this.

<Patent Document 2 (Japanese Patent Application Laid-Open No. 2002-286776)>
A voltage generating unit, which is attached to a ground electrode of a static eliminator using corona discharge and has a conductive charging plate and a support device that supports the charging plate so that the static eliminator and the charging plate maintain a predetermined positional relationship; It consists of and. The conductive charging plate is configured to be able to apply either positive or negative voltage or both, and the support device is attached to the ground electrode of the static eliminator and is slidably held on the ground electrode. It is configured as follows.

<Patent Document 3 (JP-A-5-264628)>
A probe is attached to the outside of the static eliminator that removes static electricity by causing a corona discharge between the static elimination electrode to which a high voltage is applied and the ground electrode. The probe is provided with a metal detection plate located outside the static elimination electrode and a shield plate located outside the detection plate. A discrimination device electrically connected to the probe compares the induced potential of the detection plate with a reference voltage to determine whether the operation of the static eliminator is good or bad.

<Patent Document 4 (Japanese Patent Laid-Open No. 2005-77348)>
Based on the measurement result of the high voltage power supply that outputs high voltage, the switch that switches between energization / cutoff of the metal plate and the high voltage power supply, the electrometer that measures the potential of the metal plate, and positive / negative ion The calculation unit is configured to perform a calculation process for obtaining a static elimination time in consideration of the balance deviation value and / or the swing of the potential decay waveform of the metal plate, and an output unit that outputs the calculation result of the calculation unit to the outside. The recording unit records the calculation result of the calculation unit such as the positive / negative ion balance deviation value and the static elimination time.

<Patent Document 5 (Japanese Patent Laid-Open No. 2001-124812)>
A first capacitor in which an upper metal plate and a lower metal plate charged by a static eliminator are opposed to each other via an insulator, and a second capacitor connected between the upper metal plate and the lower metal plate via a switch. Capacitors, high-voltage power supply that applies high voltage to the upper and lower metal plates, surface potential sensors placed on the surface of the upper metal plate to measure the surface potential of the upper metal plate, and measurement It consists of a display recorder such as an oscilloscope that displays and records values as analog data.

However, none of these are simple and compact structures. In addition, there are problems such as being susceptible to disturbance due to the surrounding environment such as the surrounding electric field, humidity, and dust, and large fluctuations in measurement accuracy.
JP-A-11-271372 Japanese Patent Application Laid-Open No. 2002-286776 Japanese Patent Application Laid-Open No. 5-264628 JP 2005-77348 A JP 2001-124812 A

  The problem of the present invention is that it is small and can easily measure the performance of the static eliminator without contact with it, and is less susceptible to disturbance due to the surrounding environment such as the electric field, humidity, and dust, and can be accurately measured. It is to provide a detector.

In the static elimination performance detector according to the first aspect of the present invention, the ground electrode and the external charging electrode are disposed on the outer surface of the main body case incorporating the surface potential sensor with an interelectrode insulating member interposed therebetween. and with that, the internal charging electrode is disposed to face the front surface potential sensor in the interior of the main body case, and the internal charging electrode and the external charging electrodes, conductive member penetrating the inside and outside of the main body case so as to induce charge The ground electrode, the external charging electrode, and the interelectrode insulating member are polymerized on the outer surface of the main body case in the order of the ground electrode, the interelectrode insulating member, and the external charging electrode. the external charging electrode, both Ru plate der.

As a preferred structure is the invention according to claim 2, conduction member is adapted to penetrate the inter-electrode insulating member, the grounding electrode and the main body case and the external charging electrode and the internal charging electrode through them in a non-contact Is conducted.

Also in the invention according to claim 3, conductive interelectrode insulating member is in the plate shape.
Similarly, in the invention according to claim 4, the conductive member is a conductive spring.

In the invention according to claim 5 , the main body case has a rectangular tube shape, the ground electrode is attached on the outer surface of the body portion of the main body case, and the end portion of the ground electrode that is bent into an L shape is formed on the main body case. It is a ground wire connection that follows the front end.

  According to the static elimination performance detector of the present invention, when a high voltage is applied to the internal charging electrode in the main body case to charge it, the charge is externally charged outside the main body case by the conductive member penetrating the inside and outside of the main body case. Induced to the electrode. When ions from the static eliminator are applied to the external charging electrode, an interelectrode insulating member is interposed between the external charging electrode and the earth electrode on the outer surface of the main body case. The potential changes depending on the performance of the static eliminator (specifically, changes due to ion current, etc.) and is reflected on the internal charging electrode through the conductive member. The potential change is indirectly detected by the surface potential sensor in the main body case. Because it is detected, it is less susceptible to disturbance due to the surrounding environment such as the surrounding electric field, humidity, and dust, and the performance of the static eliminator can be measured with high accuracy. Since the ground electrode and the external charging electrode are arranged on the outer surface of the main body case with an interelectrode insulating member interposed therebetween, the size can be reduced and the handling is easy.

According to the invention of claim 2, the ground electrode, the interelectrode insulating member, and the external charging electrode are polymerized in this order on the outer surface of the main body case, and the conductive member penetrates the interelectrode insulating member, and the ground electrode and the main body Since these are penetrated without contact with the case, the structure is further simplified.
According to the third aspect of the invention, since the ground electrode, the external charging electrode, and the interelectrode insulating member are all plate-shaped, further miniaturization is possible.

According to the fourth aspect of the present invention, since the conducting member is a conductive spring, it is easy to assemble the inside and outside even if the charging electrode is divided into the external charging electrode and the internal charging electrode.
According to the invention which concerns on Claim 5, the application of the high voltage to an internal charging electrode can be easily turned on / off on the outer side of a main body case.

  According to the invention of claim 6, the main body case has a rectangular tube shape, the ground electrode is mounted on the outer surface of the body portion of the main body case, and the end portion of the ground electrode that is bent into the L shape is the main body case. Therefore, the ground electrode can be stably attached to the outer surface of the main body case, and ground wiring is easy.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is an external perspective view of a static elimination performance detector according to the present embodiment. This static elimination performance detector is obtained by processing a rectangular tube made of aluminum, that is, an aluminum square pipe material. The front end opening and the rear end opening are closed by fitting a front cover piece 2 and a rear cover piece 3 which are also made of aluminum.

  On the front end portion of the upper surface (outer surface) of the main body case 1, a plate-like ground electrode 4, an interelectrode insulating member 5, and an external charging electrode 6 are attached by being superposed in this order.

  The ground electrode 4 is a metal plate piece of stainless steel or the like having the same width as the width of the main body case 1, the tip is bent into an L shape, and a rectangular electrode main portion 4 a that follows the upper surface of the main body case 1. The front end surface of the main body case 1, that is, the wiring end portion 4 b that follows the front surface of the front cover piece 2. The wiring end 4b is provided with a ground wire connection screw 7 for connecting a ground wire (not shown).

  The interelectrode insulating member 5 is a rectangular resin piece having the same size as the electrode main portion 4 a of the ground electrode 4, and the external charging electrode 6 is a rectangular metal plate piece such as stainless steel having the same size as the interelectrode insulating member 5. It is.

2 and 3 show a cross section of the static elimination performance detector.
The ground electrode 4, the interelectrode insulating member 5, and the external charging electrode 6 are configured by fitting nuts 8 fixed at two positions on the back surface (lower surface) of the external charging electrode 6 into the recess 5 a formed in the interelectrode insulating member 5. The nut 8 is polymerized by screwing an insulating screw 9 from the back side of the electrode main portion 4a of the ground electrode 4 through a hole provided in the nut 8.

  On the other hand, in the main body case 1, the main body case 1 is such that the internal charging electrode 10, which is a rectangular metal plate such as stainless steel, faces the electrode main portion 4 a of the ground electrode 4 across the upper wall of the main body case 1. It is attached to the inner surface of the upper wall via an insulating seal 11. The attachment is performed from the outside of the main body case 1 by screwing with an insulating screw 12.

  A spring guide 13, which is a small metal tube such as stainless steel, is fixed to the center of the back surface (lower surface) of the external charging electrode 6. The spring guide 13 penetrates through the interelectrode insulating member 5, and does not contact the ground electrode 4 and the main body case 1, and does not contact the ground case 4 through the hole 14 provided in the electrode main portion 4 a of the ground electrode 4. The hole 15 is provided. As a conductive member for electrically connecting the external charging electrode 6 and the internal charging electrode 10, a metal coil spring 16 is sandwiched between the external charging electrode 6 and the internal charging electrode 10 so as to be compressed. Are inserted into the spring guide 13.

  A circuit board 16 is installed in the main body case 1 with both ends thereof held by the front cover piece 2 and the rear cover piece 3. In addition to the surface potential sensor 17, various circuit components are mounted on the circuit board 16.

  For example, as disclosed in Japanese Patent No. 3518809, the surface potential sensor 17 includes a detection electrode and a vibrator that chops an electric field between the detection electrode and the object to be measured, and a sensor case having a detection hole. Is a tuning fork type in which the vibrator is vibrated by a vibrator driving circuit and the surface potential of the object to be measured is detected from the AC voltage generated from the detection electrode. The surface potential sensor 17 has its detection hole opposed to the internal charging electrode 10 at an interval, and detects the electric potential of the electric charge charged in the internal charging electrode 10 in the main body case 1 without contact. The output is amplified by an amplifier, converted into a frequency signal by a V / F converter, and then transmitted to an external display through a cable 18 connected to the rear cover piece 3.

  On the circuit board 16, a relay 19 wired to the internal charging electrode 10 and a switch 22 having a push button 21 protruding from a small window 20 provided on the side surface of the main body case 1 are also mounted. When the switch 22 is turned on / off, the relay 19 is turned on / off, and the application of a high voltage to the internal charging electrode 10 can be turned on / off outside the main body case 1.

  Further, on the circuit board 16, an operation display lamp (light emitting diode) 23, a voltage adjustment volume 24 for adjusting a high voltage applied to the internal charging electrode 10, and a sensitivity adjustment volume for adjusting detection sensitivity by the surface potential sensor 14. 25 etc. are also mounted, and these face the holes for each provided in the main body case 1.

  Since this static elimination performance detector has such a structure, when the switch 22 is turned on and a positive or negative high voltage is applied to the internal charging electrode 10, the charge is externally charged through the coil spring 16 which is a conductive member. It is induced by the electrode 6 and is charged.

  Therefore, when ions from the static eliminator are applied to the external charging electrode 6, the electric potential of the external charging electrode 6 and the internal charging electrode 10 connected to the external charging electrode 6 changes according to the performance of the static eliminator, and the electric potential of the internal charging electrode 10. The change is detected by the surface potential sensor 14 in the main body case 1 in a non-contact manner. At this time, since the main body case 1 has a sealed structure, it is less susceptible to disturbances caused by the surrounding environment such as the surrounding electric field, humidity, and dust.

  When the switch 22 is turned off, no high voltage is applied to the internal charging electrode 10. At this time, the internal charging electrode 10 can be grounded.

It is an external appearance perspective view of the static elimination performance detector which is an Example of this invention. FIG. It is a horizontal sectional view similarly.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body case 2 Front cover piece 3 Rear cover piece 4 Ground electrode 4a Electrode main part 4b End part 5 for wiring Insulation member 5a between electrodes 6 External charging electrode 7 Grounding wire connection screw 8 Nut 9 Screw 10 Internal charging electrode 11 Insulation seal 12 Screw 13 Spring guide 14 Hole 15 Hole 16 Coil spring 17 Surface potential sensor 18 Cable 19 Relay 20 Small window 21 Push button 22 Switch 23 Operation indicator lamp 24 Voltage adjustment volume 25 Sensitivity adjustment volume

Claims (5)

On the outer surface of the body case with a built-in surface potential sensor, and the earth electrode and the external charging electrode electrode insulating member interposed therebetween together is disposed therebetween, before Symbol surface potential sensor in the interior of the main body case An internal charging electrode is installed opposite to the internal charging electrode, and the external charging electrode and the external charging electrode are electrically connected by a conductive member that penetrates the inside and outside of the main body case so as to induce charge ,
The ground electrode, the external charging electrode, and the interelectrode insulating member are polymerized in this order on the outer surface of the main body case, the ground electrode, the interelectrode insulating member, and the external charging electrode.
The grounding electrode and the external charging electrode are both plate-shaped, and a static elimination performance detector. Conduction member, as well as through the electrode insulating member, a first aspect of the ground electrode and the body case, characterized in that it is conducting an external charging electrode and the internal charging electrode through them in a non-contact The static elimination performance detector described in 1. Conductive interelectrode insulating member, neutralization performance detector of claim 1 or 2, characterized in that a plate-shaped.   The static elimination performance detector according to claim 1, wherein the conductive member is a conductive spring. The main body case has a rectangular tube shape, a ground electrode is mounted on the outer surface of the trunk of the main body case, and an end portion of the ground electrode that is bent into an L shape is connected to a ground wire connection portion that follows the front end of the main body case. The static elimination performance detector according to any one of claims 1 to 4 , wherein the static elimination performance detector is provided.

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