RU2057369C1 - Transmitter of device for remote control - Google Patents

Abstract

FIELD: remote control. SUBSTANCE: each information channel of device has gauge 1, comparison 2, adaptive time sampler 15, AND gates, OR gates, distributor 13, counter 17, digital-to-analog converter 14, time setter 25, reading unit 14. Transmitter generates sending frame, which includes measured parameter as well as address of gauges, which signals correspond to measured parameter. Sending frame lacks address of gauges, which signals are redundant, in other words, which signals have not changed since last transmitted frame. In addition transmitter sends address of low-activity information channel, which has not been requested for long time. EFFECT: increased validity of data, decreased possible approximation error. 2 dwg

Description

 The invention relates to telemechanics and can be used in telemetry systems, radio telemetry, long-distance communications, where it is necessary to reduce redundancy of information.

Known transmitters of television measuring devices containing sensors, AND, OR elements, comparison blocks, trigger blocks, a reading block, a distributor, an analog-to-digital converter and clock generators [1]
The disadvantage of such transmitters is the redundancy of the transmitted messages and the increased transmission time.

Closest to the invention is a transmitter of a device for telemetry [2]
The disadvantage of the prototype device is the lack of the ability to transmit information from a channel with low activity, as well as the channel in which the adaptive time sampler fails.

 The aim of the invention is the creation of a transmitter for telemetry, in which increasing the reliability of the device is achieved through forced polling and transmission of information from a channel that is not interrogated for a given control time.

 In FIG. 1 is a functional diagram of a transmitter of a device for telemetry; in FIG. 2 functional block diagram of the reader.

 The transmitter of the device for telemetry contains a sensor 1, comparison units 2, a digital-to-analog converter 3, first and second 5 start blocks, first 6 and second 7 clock generators, first, second, third, fourth and fifth elements OR 8-11, 20 first, the second, third, fourth and fifth elements And 16, 12, 18, 19 and 24, respectively, the pulse distributor 13, the reading unit 14, adaptive time samplers 15, the first and second counters 17 and 22, the decoder 21, the code comparison unit 23 and the setter 25 time.

 The reading unit contains AND 26 and 27 elements, OR 28 and 34 elements, distributors 29 and 30, pulse shaper 31, trigger blocks 32 and 33, and a clock generator 35.

 The sensors 1 are used to convert information from the object into an electrical signal, the comparison blocks 2 are used to generate a logical signal of equality between the output voltage of the sensor 1 and the voltage from the digital-analog converter 3, the start blocks 4 and 5 with the generators 6 and 7 are used to control the operation of the counter 17, controlling the converter 3, and the distributor 13, which serves for sequential polling of the elements And 12, adaptive time sampling devices 15 are used to generate logical signals adaptive time sampling stations, elements And 18 are used to generate a reset signal of the samplers 15, the reading unit 14 is designed to convert a parallel information code into a serial one and to transmit it to the communication line, as well as to generate a reset signal of the samplers 15, a signal for permitting the passage of pulses from the generator 17 to the distributor 13 through the block 5 of the start and reset signal of the counter 22 and the setter 25 of the time through the element And 24. The transmitter also contains a control unit, consisting of a decoder 21, which serves to generate a single logic the second signal at the second input of the element And 19 of the monitored channel, the counter 22, which serves to generate the address code (number) of the monitored channel, the code comparison unit 23, which serves to generate a signal when the codes from the output of the counter 22 and the counter, distributor 13, And 24 , allowing to transmit the signal of equality of codes for resetting the counter 22 and the time setter 25 only after the transmission of the previous count by the reading unit 14. The time controller 25 serves to set the maximum possible time interval between the samples of the monitored channel and can be performed based on the standby multivibrator.

The adaptive time sampler can be built according to one of the schemes [3]
The distributor 13 consists of a decoder and a counter. The counter output connected to the inputs of the decoder is connected to the inputs of the reading unit 14, and an address code is generated at these outputs. Distributors 29 and 30 are constructed similarly. Block 4 (5, 32, 33) trigger consists of a two-input element And and a trigger. The output of the clock generator is connected to one input of the And element, and the trigger output to the other. The trigger inputs are respectively enable and disable inputs of the trigger unit.

 In block 14 of the reading provides the formation of a marker pulse from the shaper 31 (for example, waiting multivibrator) before each transmission of the parameter code. At the end of the transmission of the marker pulse (on its trailing edge), the trigger unit 32 is opened to pass the pulses of the generator 35 and the AND 26 elements are polled, and the parameter code is sequentially transmitted through the OR element 28 to the communication line. At the end of the interrogation of the And 26 elements, the signal from the last bus of the distributor 29 (on the trailing edge) closes the start block 32 and the pulses of the generator 35 do not go to the distributor 29. At the same time, the signal from the last bus of the distributor 29 through the OR 34 opens the start block 33, the pulses of the generator 35 arrive at the distributor 30 and the AND 27 elements are polled, and the address code is sequentially transmitted through the OR element 28 to the communication line. At the end of the interrogation of the AND elements 27 of the signals from the last bus of the distributor 30 (on the trailing edge), the triggering unit 33 is closed, the adaptive temporary sampler 15 of the polled channel is reset, further interrogation by the distributor 13 of the And 12 elements is allowed through the OR element 10 and the triggering unit 5, and resetting the time sensor 25 and the counter 22.

 The transmitter of the device for telemetry works as follows.

 The signals from the information sensors 1 are supplied to comparison units 2, the second inputs of which are supplied with a stepwise varying voltage from a digital-to-analog converter 3. The voltage at the input of the converter 3 is proportional to the code at the outputs of the counter 17, which is controlled by the generator 6 through the start block 4. If the voltage at the output of the converter 3 reaches the signal value of one or more sensors 1, then the corresponding comparison units 2 (or one comparison unit) give a signal to one of the inputs of the first elements And 16. Adaptive time samplers 15 continuously analyze the sensor signals and upon reaching the approximation error input signal of a given value give a signal 1 to the second input of the element And 16. With the simultaneous appearance of signals 1 at the inputs of the element And 16, i.e. if the approximation error has reached a predetermined level and the sensor signal value has a level determined by the transducer 3, the output of one or more AND 16 elements is signal 1, which is fed through the OR elements 20 and 8 to the start block 4, which prohibits the further passage of pulses from the generator 6, and at the output of the counter 17, a parameter code appears, arriving at the reading unit 14.

 At the same time, a single signal from the output of the OR element 8 through the OR element 10 and the start block 5 allows the passage of pulses from the generator 7 to the distributor 13, which alternately polls the And 12 elements. If there is a signal 1 at the first input of the And 12 element from the OR element 20 and at the second input And element 12 from the distributor 13, the signal 1 through the OR elements 9 and 11 and the start block 5 prohibits the further passage of pulses from the generator 7 to the distributor 13. At that moment, an address code will be generated on the counter of the distributor entering the reading unit 14. Upon completion of reading this address code, block 14 issues a control signal 1 (from output 1) through OR element 10 to start block 5, which allows further passage of pulses from generator 7 to distributor 13. When the last bus is reached by distributor 13, start block 5 is blocked by a single signal through OR element 11, and at the same time a signal is issued allowing the passage of pulses from the generator 6 through the start block 4 to the counter 17, after which the voltage at the output of the digital-to-analog converter 3 changes and a new group is selected, yes sensors with a parameter value different from the previous one, in which the approximation error of the signals reached a predetermined value.

 Thus, in one telemetry frame, i.e. from one marker pulse to another, the parameter and addresses of those sensors whose signals correspond to this parameter will be transmitted, with the exception of the addresses of those sensors whose signal samples are redundant.

 However, in the process of the device’s operation, such a situation is possible when a low-active signal is not polled and transmitted, and a malfunction of the adaptive time sampler can occur, which can lead to an unacceptable approximation error and may be inconvenient for the consumer.

 To eliminate this phenomenon, a control circuit consisting of a decoder 21, a counter 22, a code comparison unit 23, an And 24 element and a time setter 25 is introduced into the transmitter. In addition, the element And 19 and the element OR 20 are introduced into each channel.

 Monitoring is carried out sequentially, starting from any channel, depending on the initial state of the counter 22. The code from the output of the counter 22 is compared in the code comparison unit 23 with the address code at the output of the distributor 13. If the code at the output of the distributor is for the maximum possible time determined by the setter 25 13 at the time of the end of the transmission of the address code is the same as the code at the output of the counter 22, this means that this code was transmitted to the communication line. In this case, the signal from the block 23 code comparison through the element And 24 switches the counter 22 to the next channel for monitoring and resets the time setter 25 to its initial state. If the time determined by the setter 25 is not enough for the address code of the controlled channel to appear at the output of the distributor 13 (at the end of the transmission), then the setter 25 is triggered, the signal from the output of which is decoded by the decoder 21. At the output of the decoder corresponding to the number of the controlled channel, a signal appears 1. This single signal prepares the element And 19 of the monitored channel, the output of which is formed by a signal 1 when the comparison unit 2 is triggered, i.e. when the voltage of the converter 3 is reached, the signal value at the output of the sensor 1 of the controlled channel. A single signal from the output of the element And 19 through the elements OR 20 and 8 prohibit the further passage of pulses from the generator 6 to the counter 17 through the block 4 start and then the device works the same way as the prototype device. When the controlled channel with the help of the elements And 12 and the distributor 13 will be interrogated and the information from it will be transmitted to the communication line, the counter 22 switches to the next position, and the setter 25 is reset to zero, which leads to the removal of the gating signal of the decoder 21 (at all outputs the decoder 21 sets the signal 0).

 Thus, in this case, in a single telemetry frame, the parameter and addresses of not only those sensors whose signals correspond to this parameter and are not redundant, but also the address of a low-activity, long-interrogated channel will be transmitted, which will lead to a decrease in the possible approximation error and greater convenience for the consumer .

Claims (1)

 A TRANSMITTER OF A DEVICE FOR TELEVISIONS, comprising in each measuring channel a sensor whose output is connected to the first inputs of an adaptive time sampler and a comparison unit, the outputs of which are connected respectively to the first and second inputs of the first element AND, the first input of the second element And is connected to the corresponding input of the first element OR , the output of the second AND element is connected to the corresponding input of the second OR element, the output of the first OR element is connected to the first inputs of the first trigger unit, a read unit I and the third OR element, the output of which is connected to the first input of the second trigger unit, the first and second clock generators, the outputs of which are connected to the second inputs of the trigger blocks, the output of the second trigger block is connected to the input of the pulse distributor, the first outputs of which are connected to the second inputs of the second AND elements, the second outputs of the pulse distributor are connected to the second inputs of the reading unit, the first output of which is connected to the second input of the third OR element, the second output of the reading unit is the output of the properties, the second input of the second AND element of the last measuring channel is combined with the first input of the fourth OR element, the output of the second OR element is connected to the second input of the fourth OR element and the third input of the reading unit, characterized in that the first and second decoders, a time clock, are inserted into the device, AND and OR elements, an address comparison unit and counters, a digital-to-analog converter, the output of which is connected to the second inputs of the measuring channel comparison blocks, the inputs of the digital-to-analog converter with the inputs of the first counter and the fourth inputs of the reading unit, the input of the first counter is connected to the output of the first trigger unit, the output of the second counter is connected to the first inputs of the decoder and the address comparison unit, the second inputs of which are connected to the second outputs of the pulse distributor, the output of the address comparison unit is connected to the first input of the fifth element And, the second input of which is connected to the first output of the reading unit, the output of the fifth element And is connected to the inputs of the second counter and time setter, the output of which is connected connected to the second input of the decoder, the third input of the first trigger unit is connected to the second input of the second AND element of the last measuring channel and in each measuring channel the first input of the fifth OR element is connected to the output of the first AND element, the second input of the fifth OR element is connected to the output of the fourth AND element, the first input of which is connected to the output of the comparison unit, the second input of the fourth AND element is connected to the corresponding output of the decoder, the output of the fifth OR element is connected to the corresponding input of the first OR element , the first input of the third element And is connected to the output of the second element And, the output of the third element And is connected to the second input of the adaptive time sampler, the second inputs of the third elements And are combined and connected to the first output of the reader.

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