SU934516A1 - Device for monitoring operating time of machines - Google Patents

Description

; The invention relates to instrumentation and can be used in systems for recording the operating time of machines and mechanisms when fixing devices are installed directly on the object being monitored. . It is known a device controlling the operation time of machines, containing a master oscillator, a frequency divider and a current time counter, which are connected in series, while the outputs of the current time counter are connected to parallel code receivers installed on the object, and the receivers turn on synchronously with the start of operation of one or another Object 1. The drawback of the device is the low reliability of operation and the transfer of temporal information. This is due to the fact that when the object is turned on at the time of transmission of the sequential formation, the recorders may fail due to the competition of the object switching pulses and information transmission pulses. The closest in technical essence to the present invention is a device for controlling the operation time of machines, comprising a pulse generator, the output of which is connected to the input of a frequency divider, the first output of which through the first counter is connected to the inputs of a parallel unipolar code converter to a serial two-pole control whose input is connected to the second output of the frequency splitter, the communication channel, the code receiver, the code setting unit and the control unit 12}. The drawback of the device is low reliability of operation, which is due to the fact that when a controlled object (objects) is turned on, there can be a competition between machine switching pulses and information transmission pulses, leading to failure of the recorders (code receivers). In addition, a variety of code receivers that perceive parallel or sequential codes imposes their individual requirements on time control devices, since the most reliable information transfer is performed by a sequential bipolar code, and data fixation is expedient by parallel unipolar code

The purpose of the invention is to increase the device’s nationality.

The goal is achieved by having a device for controlling the operating time of a machine, containing a pulse generator, the output of which is connected to the input of a frequency divider, the first output of which is connected to the inputs of a parallel monopolar code converter into a second two-polar control input through the first estimator the output of the frequency divider, the communication channel and the receiver code, entered pulse shapers, elements And, the delay element, the register and the second counter, the outputs of which through the first element t And connected to the first inputs of the second and third elements And, the second inputs of which are connected to the outputs of the first and second pulse generator, the output of the second element And through a chain of successively connected delay elements and the third pulse generator connected to the first input of the register, the second input of which is connected to the output of the third element And, the outputs of the register are connected to the inputs of the receiver code, the outputs of the converter of the parallel unipolar code to the serial two-polar and the second output of the frequency divider S are connected via a communication channel to the inputs of the first and second pulse shapers and the second counter, respectively.

The drawing shows a block diagram of the device.

The device for controlling the operation time of the machines contains a generator of 1 pulses, a divider of 2 frequencies, the first counter 3} the converter k of a parallel unipolar code to a serial two-pole, consisting of the converter 5 of a parallel code to a serial and pre-. Former 6 unipolar code

in bipolar, communication channel 7, the first and second shaper 8 and 9 pulses, the second and third elements And 10 and 11, the register 12, the receiver 13 of the code, the second counter if, and the first element And 15.

The device works as follows.

Voltage pulses are fed from the output of pulse generator 1 to frequency divider 2. The division factor of the frequency of the pulses of the divider 2 frequency is chosen so that from its main output the pulses are applied to the input of the first counter 3 with a frequency equal to the chosen time-fixing accuracy, for example, units or tenths of a second

Since the first counter 3 is preset to the required state, for example, at the current time, a parallel voltage code is also taken from its outputs, also characterizing the current time.

Output signals of the first counter

3 enter the converter input

The k parallel code to serial, the operation of the parallel code to serial converter is controlled and synchronized by pulses taken from the second output of divider 2 frequencies. Since the repetition frequency of these pulses is very high, then from the output of the converter

The 4 parallel code sequentially removes the signals of the exact time, which are repeated several times during the selected working time precision interval. Sequential sending of signals of the exact preamplifier arrives at the converter 6 of a unipolar code into a two-polar one, from the output of which two-pole voltage pulses are taken, which characterize logical zeroes and units of the sequential code.

This code is very noise-resistant when transmitting information over considerable distances, therefore reliable information about the exact time is present at the output of communication channel 7. The exact payload information may be sent directly to the receive blocks of the sequential bipolar code.

Claims (2)

Next, a two-pole sequential time code goes to the first 5 and second drivers 8 and 9 pulses, and their output signals go to the second and third elements AND 10 and 11, to the other inputs of which the voltage-permitting voltage pulses, taken from the output of the first element 15, arrive. Since the voltage impulses taken from the second output of the divider frequency 2 are input to the input of the second counter k, they are synchronous with the individual premises of the exact time of the sequential code. Using the first element AND 15 from the output of the second counter Ik, a voltage code is dialed, clocking the transmission of information by the second and third elements AND 10 and 11. The information clocking time can be chosen long enough, for example, one consecutive package per minute. Since one consecutive sending is very small compared to the timing of information clocking, accordingly, the likelihood of the machine (mechanism) starting up in this period of time is significantly reduced. The output signal of the third element And 11 goes directly to the counting input of the register 12, and the output signal of the second element And 10 is delayed by the delay element 1b for the time required for reliably setting the voltage on the counting input of the recorder 12, and through the third pulse generator 17 On the synchronizing input of the register 12, the Delay Element 16 and the third shaper 17 pulses provide the location of the sync pulse relative to the counting one approximately at its middle, i.e. the beginning of the sync pulse is shifted, and its duration is reduced relative to the counting pulse. This allows the register 12 to operate reliably when it is controlled by machines and to eliminate the competition between the counting and synchronizing pulses. A parallel voltage code describing the current time is removed from the outputs of register 12. 166 The introduction of new units and the introduction of appropriate functional links will improve the reliability of the device. Apparatus of the invention for controlling the operating time of a machine, comprising a pulse generator, the output of which is connected to the input of a frequency divider, the first output of the latter through the first counter is connected to the inputs of a parallel uni-polar code converter to a serial two-polar, control input of which is connected to the second output of a frequency divider , communication channel and code receiver, characterized in that, in order to increase the reliability of the device, pulse shapers, AND elements, delay element, register are introduced into it and the second counter, the outputs of which through the first element And are connected to the first inputs of the second and third elements And, the second inputs of which are connected to the outputs of the first and second pulse generator, the output of the second element And through a chain of successively connected delay element and the third pulse generator connected to the first the input of the register, the second input of which is connected to the output of the third element I, the outputs of the register are connected to the inputs of the receiver of the code, the outputs of the converter of the parallel unipolar code into the The positive two-pole and second output of the frequency divider are connected via a communication channel to the inputs of the first and second pulse shapers and the second counter, respectively. Sources of information taken into account during the examination 1. USSR author's certificate No. 558257, cl. G 07 C 3/00, 1975. 2. USSR author's certificate ff 672611, -kl. G Oi F 10/10, 1977 (prototype).