RU2118044C1 - Selector switch of electric circuits - Google Patents

Abstract

FIELD: pulse distribution equipment, in particular, for control and telemetry systems, communication equipment. SUBSTANCE: device has binary pulse counter, decoder, two delay lines, AND gate, OR gate, NOT gate. When control signal is absent, electric circuit is provided. EFFECT: possibility to control working order of control circuit and switch control electric pulses to another electric circuit. 1 dwg

Description

 The invention relates to devices for the distribution of current pulses and can find application in control systems, monitoring, measurement, communication devices and other devices of various industries.

 Known electrical circuit switch, described, for example, in [1], containing a wired electromagnet, a distribution brush connected to the electromagnet by means of a ratchet mechanism, and a contact annular field consisting of a number of consecutive insulated contacts circled by the brush during successive trips of the electromagnet. The disadvantages of such a device include the lack of monitoring the health of an external controlled actuator / or its control circuit / and switching the current pulse to the next working electrical circuit with a working actuating device.

 A switch of electric circuits is also known, described, for example, in [2], made on a current pulse distributor, implemented on shift registers and OR elements. The disadvantages of such a device should also include the lack of choice / selection / working electrical circuit with a working actuator.

 As a prototype adopted the device described in [3].

 The aim of the invention is the expansion of functional capabilities, namely the achievement of the ability to control the health of the control circuit and the actuation of an external actuator and switching the control pulse / signal / to the next working electrical circuit.

 This goal is achieved by the fact that the current pulse distributor is made on a binary pulse counter operating on the leading edge of the pulses, and the decoder and the device also additionally have two delay lines and OR, AND, NOT.

 The drawing shows a diagram of the selector switch of the electrical circuits / 15 controlled circuits /.

The device contains at least three inputs, two of which are informational, and two outputs. The input I / O of the device, intended for receiving the distribution of signals, is connected to one of the inputs of the two-input element Н / key / 1, to the second input of which the output of the element NOT 2 is connected, and the output is connected to one of the inputs of the two-input element OR 3, to the second input which is connected to the output of the delay line 4. The output of the OR 3 element is connected to the input C of the binary pulse counter CT2 5, and one of the inputs of all two-input elements And 6 / keys /, the number of which is equal to the number of outputs of the counter 5. To the second inputs of the element And 6 are connected corresponding binary outputs of the counter CT2 5. The outputs of the element And 6 are connected to the corresponding binary inputs of the decoder DS 7, the outputs of which are connected respectively to the outputs of the Outputs. i devices. To the information inputs of the device ВХ.i / except Вх. О / external sensors of operability control of output circuits are connected. Inputs _{i are} connected respectively to the inputs of the multi-input element OR 8, the output of which is connected to the input of the re-delay line 9, the output of which is in turn connected to the inputs of the HE 2 and the delay line 4, the output of which is connected to one of the inputs of the elements OR 3 and OR 8.

For the normal functioning of the device, it is necessary that the delay time of the signal delay line 4 was:
t _{health 4} > t _{pc. HE2} + t _{pc. I1}
t _pk.NE2 and t _pk.I1 - switching time NOT 2 and I1, respectively:
the delay time of the signal line re-delay 9 was:
t _srab.I9 <t _bldg . ₉ <t _and
t _srab.I9 and t _and -the response time of the external actuator and the duration of the control external signal, respectively.

 The device operates as follows. In the initial state, the counter CT2 5 "reset". To distribute the signals to external electrical circuits, a control signal is fed to input Vx. About the device and one of the inputs of the two-input element AND 1 / key /. At the second input of AND element 1, there is a logical unit signal, since at all inputs of OR element 8 / external actuators did not work / there are no signals and there is a logic zero signal at the output of the repeated delay line 9, at the output of element NOT 2 there is a logic unit signal. The first control signal is transmitted through the OR 3 element to the input of counter CT2 5. The counter switches and the distribution of control signals begins. Elements And 6 / keys / are opened on each control signal and transmit the output binary code of the counter CT2 5 to the corresponding inputs of the DS 7 decoder. The first signal is transmitted from the DS 7 decoder to the first output of Output 1 of the device and then to the first external actuator. If the actuators carry out commands / control circuits are good /, their control sensors alternately send single signals through the information inputs of the device input Ii.i to the OR element 8. Each information signal resumes the time counting by the repeated delay line 9, leaving a logic signal zero at its output, allowing alternately transmit external signals through the AND 1 and OR 3 elements to the pulse counter ST2 5 and further, through the And 6 elements to the DS 7 decoder and the outputs of the Outputs. i devices.

If any external actuator does not work / the electrical circuit is faulty / the signal about the execution of the command from the control sensor does not arrive at the OR element 8 and the delay line 9. Resume of the delay time of the signal does not occur even after t _{health 4} at the output of the delay line 9, a single logical signal appears, inverted by the circuit NOT 2 and the closing element AND 1 / key /. The control signal to the counter CT2 5 is not transmitted. At the same time, a single signal from the repeated delay line 9 is transmitted through the delay line 4 and the OR element 3 with some delay relative to the moment of closing the element And 1 to the input From the counter CT2 5. The counter switches to one and transmits a signal to the next output of the device. At the same time, the signal from the delay line 4 is transmitted through the element OR 8 to the line of the repeated delay 9, which begins the re-counting of the time from the moment the signal is switched to the next output of the device. If several actuators are faulty, a similar switching is carried out until the first operational.

 Thus, switching the output circuits to the device outputs is carried out either from external control signals / when the command is executed by an external actuator /, or from delay lines 9 and 4 / when the command / is not executed. Moreover, in this case, the same signal to the next actuator is supplied during its passage, which eliminates the passage of the control signal in their sequence. Elements And 6 are designed to de-energize the output electrical circuits after the end of the control signal. The selector switch circuit may be in the form of an integrated circuit.

Literature
1. Milovzorov V.P. Electromagnetic devices of automation, M., "Higher School", 1983. S. 286.

 2. Bukreev I.N. and other Microelectronic circuits of digital devices. M., Soviet radio. 1973. p. 205. Fig. 6.4.

 3. Application for the invention "Delay Line" N 96124273/09/031130 / from 12.26.96.

Claims (1)

 A selector switch of electrical circuits comprising an input of the device and at least two information inputs, as well as at least two outputs of the device, a binary pulse counter, two delay lines, an AND element, and an NOT element, characterized in that the decoder is additionally equipped with two OR element and AND elements according to the number of bits of the counter output code, while one of the delay lines is a re-delay line, the input of the device being connected to the first input of the first two-input element And, with the second input the output of the element is NOT connected, and the output of the first AND element is connected to the first input of the first two-input OR element, the second input of which is connected to the output of the delay line, and the output of the first OR element is connected to the counting input of the binary pulse counter and the second inputs of all other two-input elements AND, the first inputs of which are connected to the binary outputs of the pulse counter, and their outputs are connected to the corresponding binary inputs of the decoder, and the information inputs of the device are connected to the inputs of the second odovogo OR gate whose output is connected to the input retransmission delay line, whose output is connected to the input of NOT circuit and the input of the delay line, whose output is connected to one input of multi-input OR gate, and the outputs of the device are connected to respective outputs of the decoder.