RU2032228C1 - Telemetering device - Google Patents

Abstract

FIELD: remote metering technology. SUBSTANCE: telemetering device has switch 1, comparison unt 2, AND gate 3, storage units 4 and 9, read-only storage unit 5, flip-flop 6, counter 7, buffer storage unit 8, analyzer 10, first clock input 11, second clock input 12, data output 13, and signal output 14. EFFECT: provision for automatic location of sensors subject to noise protection, eliminated re-transmission of measurement result already sent to user. 1 dwg, 1 tbl

Description

 The invention relates to techniques for telecontrol and telecontrol, in particular to devices for tolerance control.

 Telemetry devices are known that carry out tolerance monitoring of the current sensor values and output to the line those sensor values that are out of norm, containing a sensor switch, a comparator, a code-voltage converter, a memory unit, an AND-OR element, a counter, an AND element, a trigger.

 The disadvantages of these devices are the need to compare only analog signals on a comparator, which limits the capabilities of the device and reduces the accuracy of control, as well as low resistance to impulse noise. In addition, the device does not provide estimates of the novelty of the displayed message, since the previous sensor reading is not monitored, i.e. has information redundancy.

 The closest in technical essence to the invention is a telemetry device containing a switch, a comparison unit, a conversion unit, the first and second AND elements, a memory unit, read-only memory (ROM), an AND-OR element, a control unit, a buffer memory unit, a counter, trigger.

This device compares the analog signal with the nominal value of the sensor, stored digitally in ROM and converted into an analog signal in the conversion unit. The comparison result V is compared with the constant V _extra for all sensors, when it is exceeded, the "Event" signal (not the norm) is recorded on the trigger and the measured parameter and the sensor address are recorded in digital form in the buffer storage unit. To increase the noise immunity, the “Event” is recorded only if there is a “Non-norm” in the previous measurement cycle, information about the results of which (“0”, “1”) is stored in the storage unit.

The disadvantages of the known device are the following:
1. The device carries out tolerance control only of the signals of analog sensors, but not digital codes (groups of signal sensors).

 2. Due to the storage of the nominal values of the sensors in the ROM, the subsequent digital-to-analog conversion and subtraction of the obtained value from the real sensor signal, the tolerance control is carried out with a single tolerance for all sensors, regardless of the measurement scales and types of sensors.

 3. As a rule, in tolerance control devices there are sensors that require protection from interference (sensors of important events that signal emergency situations), and sensors that require increased speed (other event sensors). Due to the delay in the cycle of all measurement results, the efficiency of decision-making is lost, i.e. overall device performance is reduced.

 4. Since all readings that exceeded the threshold are recorded in the buffer storage unit if the threshold is exceeded in the previous cycle, then if the sensor is constantly behind the threshold, information about it is written to the buffer storage unit in each measurement cycle, starting from the second. This leads to the consumption of the volume of the buffer storage unit by one sensor, i.e., to the redundancy of the device.

The aim of the invention is:
1. The expansion of the device’s functionality by comparing digital codes in a digital comparator, which makes it possible to process signals from both digital sensors and analog ones, previously converted by an analog-to-digital converter into a digital code. In addition, a comparison of the signal with the digital norms stored in the ROM allows individual sensors to be set for each sensor for both the upper value and the lower one. This significantly improves the accuracy of measurement and control.

 2. Improving the overall performance of the device due to the logical processing of the history and measurement results and automatic determination of the need for protection against interference of specific event sensors with signs of "importance" stored in the ROM along with the sensor standards. This also eliminates the redundancy of the device, since it eliminates the possibility of writing to the buffer storage unit unchanged parameters of the same event sensor, which is constantly outside the norm. Recording will be made only when the sensor goes beyond the norm from the initial state.

 The drawing shows a diagram of a device.

 The device (see drawing) contains a switch 1, a comparison unit 2, an And 3 element, a first memory unit 4, a read-only memory unit 5 (ROM), a trigger 6, a counter 7, a buffer memory unit 8, a second memory unit 9 and an analyzer 10, the first 11 and second 12 are clock inputs, information 13 and signal 14 outputs per line.

 The switch 1 may consist, for example, of the actual switch of analog and digital sensors, an analog-to-digital switch and an analog-to-digital converter.

 Comparison unit 2 compares the digital codes at the inputs and outputs the result “Normal -“ Not normal. ”The sensor information code is output to the second output.

 Memory blocks 4 and 9 store the result of the comparison ("0" or "1") at the address of each sensor. Permanent memory unit 5 (ROM) contains the addresses of the sensors, upper and lower standards, signs of "importance" of events.

 The buffer memory unit 8 stores the measured values of the sensors location with addresses. It has a built-in driver of signals necessary for recording and reading information. The issuance in the line of stored information through the first output 13 of the device is clocked by pulses TI 1 received through the first clock input 11 of the device.

 The device operates as follows.

 In the initial state, memory blocks 4 and 9, trigger 6, counter 7, and buffer memory block 8 are reset (for example, by turning on the power). Upon receipt of the clock pulses TI 2 through the second clock input 12 to the account 7, at its output, the parallel address code of the ROM 5 is enumerated. The interval between the pulses TI 2 is the channel interval between measurements.

 At the beginning of each interval, the trigger is reset by 6 pulses of TI 2. At the ROM address 5 installed on the counter 7, the address code of the i-th event sensor is read from ROM 5, which from the second output of the ROM 5 goes to switch 1, connecting the i-th sensor to device. The measurement result is digitally fed to the first input of the comparison unit 2, at the second input of which there are codes of the upper and lower norms for the i-th sensor, read from the ROM 5. The comparison unit 2 gives the logical inputs to the first inputs of the element And 3 and the first memory block 4 "0" if the value of the i-th sensor is within normal limits, and "1" if the value is out of norm. In addition, the measured value of the sensor is supplied from the second output of the comparison unit 2 to the information input of the buffer memory unit 8. If the comparison result is “not normal” (“1”), then the passage of this signal through the And 3 element depends on the result of logical processing of previous polls of this sensor in the analyzer 10. Each processing interval is divided into two stages. In the first case, information on the state of the i-th sensor in the previous polling cycle is read from memory blocks 4 and 9, as well as an analysis of the presence of the ith sensor of the “importance” indicator received from ROM 5 at the first input of the second memory block 9 and analyzer 10 In the second stage, after deciding whether there is an "event" or an "important event", the sensor processing results are recorded in blocks 4 and 9.

 The analyzer 10 implements the following function (see table).

 Suppose that the i-th sensor has exceeded the norm. Since “0” is written in both blocks 4 and 9 in the initial state, then with the sensor state “not normal” and the sensor has no sign of “importance” (“1”), the analyzer 10 allowed the passage of “1” from the first output of the comparison unit 2 through element And 3 to the S-input of trigger 6, setting it to the "event" state, allowed the recording of the information code of the i-th sensor received at the information input of the buffer memory unit 8 along with the address of the i-th sensor received at the address input of the block 8 s ROM 5. Next, at the i-th address of the first memory block 4 is written "1" ("not the norm"), received from the second output of the comparison unit 2.

 In the second polling cycle, if the i-th sensor remains outside the norm, the analyzer 10 reads “1” from the first memory block 4, “0” from the second memory block 9, and a sign of the absence of an “important event” (“0” ) and prohibits the passage of "1" through the And 3 element and the introduction of trigger 6. Information is not recorded in the buffer memory unit 8. Information from the i-th sensor is re-written to the buffer memory block 8 only after the sensor code returns to normal ("0" is written to the first memory block 4) and again goes beyond it.

 If the sign of “importance” (“1”) is written in ROM 5 at the address of the i-th sensor, then when the sensor goes beyond the norm, processing will go as follows.

 Measurement and comparison with the norm, recording in the first memory block 4 "1" will occur as described above, but recording in the buffer memory block 8 is not performed and the signal "important event" from the second output of the analyzer 10 is not issued to the line, since the analyzer 10 must determine whether the “important event” is caused by interference. For this, the issue of the sign “important event” is prohibited by the presence of read “0” from blocks 4 and 9 and the sign of “importance” read from ROM 5, i.e. in the first cycle, the sensor preprocesses with the result of "no event".

 If the i-th sensor continues to be outside the norm in the second cycle, then the analyzer 10, reading from the first memory block 4 "1", from the second memory block 9 "0" and from ROM 5 - a sign of an "important event" ("1") , makes the final decision that an "important event" has occurred. Information about the sensor is recorded in the buffer memory unit 8, and an important event signal is issued from the second output of the analyzer 10 to the line through the signal output 14 of the device. Based on this signal, external devices determine the further actions of the object on which the telemetry device is installed.

 At the same time, “1” is overwritten into the second memory block 9 from the first memory block 4 and “1” is confirmed in the first memory block 4. If the i-th sensor remains outside the norm in subsequent cycles, then the analyzer 10 by the presence of “1” on the first and second inputs blocks the further recording of information of the i-th sensor in the buffer block of memory 8 and the issuance of the signal "important event" in line. The specified processing is carried out for each sensor separately.

 Thus, the introduction into the known device of the analyzer and the second memory unit in the indicated connection between each other and other units of the device allows to increase the speed by logical processing of the history and measurement results, eliminate device redundancy, allow tolerance control of analog and digital sensors according to individual standards for each sensor, unlike the prototype device, without compromising its noise immunity and other parameters.

Claims (1)

 A TELEMETRIC DEVICE containing a comparison unit, a first memory unit, a permanent memory unit, a counter, a buffer memory unit, a trigger, an AND element, a switch connected by an output to the first input of the comparison unit connected by the first output to the information input of the buffer memory unit, and the second output - with the information input of the first memory block and the first input of the AND element, connected to the output to a single input of the trigger, the output and the read permission input of the buffer memory block are respectively the information output and the first clock input of the device, the counter input of the counter is the second clock input of the device, the information inputs of the switch are the information inputs of the device, used to connect sensors of controlled parameters, characterized in that a second memory unit and an analyzer are inserted into the device, connected to the outputs by the first and second inputs, respectively the first and second memory blocks, the third input to the first information input of the second memory block and to the first output of the permanent memory block associated address with the discharge outputs of the counter, the second output with the second input of the comparison unit, and the third output with the address input of the buffer memory block, the control input of the switch, the address input of the first memory block and the address input of the second memory block connected by the second information input to the output of the first of the memory block, the first output of the analyzer is connected to the second input of the And element, connected by the output to a single input of the trigger, connected by a direct output to the write permission input of the buffer memory block, zero in od is the second flip-flop clock input of the device, the second output signal output analyzer is a device.

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