SU746670A1 - Remote measurement transmitting device - Google Patents

Description

one

The invention relates to the field of telemetry, can be used in telemechanics, in automatic control systems, etc.

A device for transmitting 5 telemetry I, in which the input signals are amplified by adaptive time samplers (AED), is known that generates pulses at times when the approximation error exceeds a given one. These moments are memorized by the memory circuit of the moments of occurrence of requirements for polling channels consisting of sawtooth generator N 1. The outputs of the memory circuit 15 are fed to the inputs of a maximum signal detector, the number of inputs and outputs of which is equal to the number of channels from the | 1 circuit, in which the signal appears at the output that corresponds to the largest input signal. If the maximum input signals are not many, then the channel selection logic will select one of the channels. The address memory device translates the 25 input position code based on a number system (for example, in binary code) and records the signals corresponding to the address code of the selected channel in 30 seconds.

gistr memory The output of the memory register through the decoder opens the key in the channel where the AED has worked before everyone else, and also resets the AED and the sawtooth generator of this channel to zero. The sensor output of the selected channel is encoded using an ADC, the KOD of which, together with the address code of the selected signal, is transmitted via the readout unit to the output of the telemetering system.

The disadvantage of the known device is its complexity.

It is also known a device for transmitting telemetry containing, in each measuring channel, an approximation error converter (APP), whose input and a key input are connected to the device input, an output of an approximation error converter and a control input of the key of all information channels are connected respectively to the first inputs and outputs of the error analyzer, the second outputs of which are connected to the first inputs of the reading unit, the first output of which and the output of the pulse generator are connected to the corresponding. the inputs of the error analyzer, the outputs of the measuring keys

The channels are connected via an analog-to-digital converter with the second inputs of the reading unit 2.

A disadvantage of the known devices for transmitting telemetry, working on the principle of adaptive switching, is the lack of control over the operation of the adaptive part of the device (PPA or AVD), while the control device of the ADC switches, i.e. Other parts of the transmission devices are known. The failure of the FPA can lead to the fact that this channel will not be polled at all, or, conversely, only information from this one channel will be transmitted to the communication channel.

The aim of the invention is to improve the reliability of the device and expand its functionality by introducing control over the operation of the FPA (e.g., cold backup).

This goal is achieved by introducing the waiting Multivibrator and into the measuring channel of the trigger, Element I, the display unit and the differentiating element whose input

connected to the output of the approximation error converter, the output to the first trigger input, the trigger output is connected to the first input of the element I, the output of which is connected to the display unit, the second output of the reading unit is connected directly and through a waiting multivibrator in each measuring channel with the second inputs respectively of the trigger and element I.

The drawing shows a device for transmitting telemetry.

 The device contains PPA 1, the inputs of which are connected to the inputs of the device, the outputs of the PPA are connected to the inputs of the analyzer 2 errors, the outputs of which are connected to the control inputs of the keys 3 and the PPA 1, read block 4, pulse generator 5, analog-to-digital converter 6 (ADC) , differentiating elements 7, triggers 8, elements AND 9, waiting for multivibrator 10, display unit 11. .

The device works as follows; - .-.

In each measuring channel PPA 1 continuously analyzes the input signal. The output voltage of the PSA, proportional to the approximation error, is fed to the 2 error analyzer, where the signal from the readout unit 4 selects the channel with the most approximation error. The corresponding key 3 is opened, the input signal of the selected channel is converted into a code using the ADC 6. The parallel information code from the ADC and the address code from the analyzer 2 enters the readout unit 4, where it is formed into a serial one and transmitted to the communication channel. At the end of the transfer (reading), it issues a signal to analyzer 2, allowing the start of the next cycle. At the moment of selecting a specific channel, the PPA of this channel is reset, i.e. its output voltage decreases to zero. At the output of the differentiating element 7, the Wits pulse acting on the trigger 8. Initially, the trigger 8

signal from the unit. 4, going through

a certain number of device operation cycles is set so that a signal 1 appears at its output. The signal that appeared at the output of the differentiating element 7 resets the trigger 8 of this channel to the O position.

At the end of a predetermined predetermined time determined by the dynamic properties of both the input signals and the FPA themselves, the output of the waiting multivibrator 10 is a signal 1 arriving at one of the outputs of the And 9 element. Pa

5, the second input element And the signal from the trigger 8: 1, if the PPA reset in this channel was not, and O, if the reset occurred. The signal from AND 9 enters the corresponding display unit 11, where a visual indication of a channel failure occurs.

Thus, the operation of the PPA in this device is monitored.

5 If a malfunction is detected, the PPA may be replaced with a backup one, which increases the reliability of the device. Preliminary calculations have shown that the probability of FPA trouble-free operation in this case increases by about 2 times (for the PAP mentioned above). With the complication of the PPA, the gain is further increased.

Claims (2)

1. USSR author's certificate No. 225036, cl. G 08 C 19/28, 25.04.67. 2.Fremke A.V. Telemetry, M., Higher School, 1975, p. 232-234 0 (prototype).