SU746439A1 - Device for collecting data from two-position sensors - Google Patents

Description

1 The present invention relates to a technique for receiving, controlling and processing information.

A device for collecting data from two-position sensors is known, comprising a code converter, AND elements, OR element, register AND comparator 1.

This device is not sufficiently: reliable.

The closest to the proposed invention is a device for collecting data from two-position sensors, containing an address register, the outputs of which are connected to the first inputs of the interface unit, the information inputs of the decoder and the first input of the switch, the output of which is connected to the second input of the interface module and the first inputs the shift register and the block compare, the second input of which is connected to the output of the element .OR, the output of the shift register is connected to the third input of the interface block, and the output of the comparison block to the fourth the input of the interface block and to the first input of the element OR 2.

A disadvantage of this device is its low reliability.

The purpose of the invention is to increase the reliability of the device.

The goal is achieved by introducing a switch and a memory unit into the device, the first inputs of which are connected to the decoder outputs, the second inputs to the first output of the pulse generator, and the output to the second inputs of the switch, the first input of the switch is connected to the output of the comparator, and output - with the input of the address register by the control input of the decoder and the second input of the OR element.

15 The structural electrical circuit of the device is shown in the drawing.

The device contains a memory block. 1, pulse generator 2, decoder 3, switch 4, shift register 5, comparison block 6, element OR 7, address register 8, interface block 9 to switch 10.

The device works as follows.

25 IN THE INITIAL STATE The memory unit 1 receives the codes O from the sensors, the memory unit 1 is reset to the initial state due to the signals coming from the decoder 3. This

30 occurs as follows. li i:; -bitW4 - - - - - --------- - ----- - -.-..- -.;. - -..---, -.-, ..- ,. .-. -i- „Under the influence of the code coming from the output of the register 8 to the control inputs of the switch 4 and the decoder 3, the output of the trigger of the corresponding sensor in memory I memory through the switch 4 is connected to the input of the register 5 and to one of the inputs of the comparison unit 6. When This reset signal at the output of the decoder 3 absent. The second input of block 6 through the element OR 7 is given a signal from the output of register 5, where information is recorded; the sensor trigger state in memory block 1 in the previous interrogation cycle. If the code from the output of the sensor trigger in the memory block corresponds to the code with the p sgr of the shift, a signal appears at the output of the block b, which arrives at the input of the switch 10 and allows the clock pulse from the generator 2 to interrogate the next year . . ,:; This clock pulse records the shift register. The position of the trigger in memory block 1 in this cycle, and the recording, performed in the previous poll cycle, as well as affecting the input of the decoder 3, forwards at one of the outputs. with the code, the output of the register of address 8 arrives, the reset signal of the trigger of this sensor in memory block 1 to the initial position, and the falling edge translates the register of address 8 into the following position 11KG saShy Shdklycha output of the trigger of the next sensor in memory block 1. Pulse pulse Procedure to the input of the OR gate 7 generates the output on er signal corresponding to the output from the flip-flop in the memory 1, when it is in the rest position. Due to this, during the Transient process, at the output of block b, a signal is generated allowing the clock to pass through the switch 10. Interrogation of subsequent triggers in memory block 1 occurs in a similar way. When VHB: Sensor waits in the alarm state, a code is formed at its output. This is the winding voltage of the pulse from the generator 2 to the trigger of memory 1,;: ;; ЖШ1ШтШ в ;; No. of a ds shsh1 No. of DatinKas ejioke of memory I. At warhead: b: the new poll, and the code from the output of the trigger in memory block 1 dan; It does not correspond to the code from the shift register entry 5. At the same time, the output of the unit is in a signal;) signal,) Ito1Shy71goSHTGSVHa TShGGyOTSHM tel. yes cWiTaWr 1ГВ1Г№рОв а, gives out to the 5 block of interface 9 a signal q-the presence of information in the device in a searchErms Shchachu | | W

Mfl -ai-Cis.-v -Js. The block 9 of the address of the sensor that changed its state and the direction of the change of this state, which is fed to the block 9 from the output of the shift register 5 and the output of the switch 4. After processing & these data, an acknowledgment (acknowledgment) signal of reception, pass through the switch 10 , writes to the shift register 5 a new (emergency) position of the trigger in memory block 1, erasing the old one, resets the trigger in memory block 1 of this sensor to its original position and switches the address register 8 to the next position to poll the next sensor. If the sensor is in an alarm state and during the receipt of a confirmation signal that this information has been received, after setting the trigger in memory block 1 to the initial position, it returns to the emergency position after the arrival of the first clock pulse from the pulse generator 2. As a result, In the next polling cycle, the trigger code in memory block 1 and the exit code of the status of this sensor are not transmitted. If the sensor enters the alarm state and returns to normal (initial) even before the first polling cycle, by a signal confirming that the alarm information about this sensor has been received, its trigger in memory 1 is reset and remains there emergency condition. In the next polling cycle, the code from the output of the trigger in memory block 1 and the code (emergency) from the output of shift register 5 do not correspond to each other, as a result of which the information about the transition of the sensor from the alarm state to the initial state is transmitted. Thus, information from the data acquisition device from two-probe sensors is transmitted only at the moments of code change at the sensor outputs, which makes it possible to significantly reduce its volume, reduce the time spent by the device receiving and processing information to receive data on the state of one sensor, and improve noise immunity. transmission channel, information, which increases the reliability of the device for the collection of information. In addition, not only the address of the sensor changes its status, but also the data on the change of the sensor state, i.e. about the transition from the state of Ni 1 t O or from O 1. The use of a device in control systems allows to reduce

the amount of information processed and improve the quality of management.

Claims (2)

1. Wheat A.M. Portnov M.L. Telemechanical systems on integrated circuits, M., Energie, 1977, p. 161. 2. USSR author's certificate 0  399854, cl. G 06 F 3/04, 1973, (prototype).