SU813484A1 - Device for monitoring operating time of machines - Google Patents

Description

The invention relates to instrumentation, to time control systems and setting time intervals, and can be used in automated control systems for automatic control systems of enterprises in production process control systems and other specialized devices, when information about the current time or the time of occurrence of a given event is crucial. for making specific decisions A device for controlling the operation time is known, comprising a reference frequency generator, an AND element, a frequency divider, current time clock, control unit, displays and input device flj. The correction of information in this device is made three times. The first is the installation of the required number in the data input device, which characterizes the future time recorded in the current time counter by the exact time signals. It should be noted that the required number is set using a switching switch each of which is designed for a separate current time counter , the second is the resetting of the current time counter and locking on the input of the frequency divider. The third is at the time of the signal of the exact time of entering the number typed in the input device into the current time counter in the parallel code. The disadvantage of this device is a significant number of controls, the work with which distracts the operator’s attention to unproductive operations, which weary of it and leads to the adoption of flexible solutions, which leads to a decrease in the accuracy of the device. Closest to the present invention is a device for controlling the operation time of machines, containing a reference frequency generator, the output of which is connected to the input of a frequency divider, counting decades by the number of decimal places, each of which contains an AND element, the output of which is connected to the first input of the OR element the output of which is connected to the input of the pulse counter, the first input of the element AND the first counting device is connected to the first output of the frequency divider, the outputs of the pulse counter of all counting decades are connected to the inputs of the display, control the counting inputs of the k -ulses of each counting decade are connected to the first inputs of the AND elements followed by the number of counting decades, the control unit, the shift register, the time interval generator, the AND, OR-NOT elements

The correction of information in this device is carried out with the help of a control unit containing memory elements into which information is entered using a serial code taken from the output of the reference frequency generator. Since the outputs of the control unit are connected through the elements to the inputs of the counting decades, an external command supplied by the operator transfers the code of the number written to the memory element to the pulse counters.

A disadvantage of this device is the use of a sequential code of the number stored in the memory elements of the control unit, which leads to a significant waste of time by the operator on the sequential value of all the bits of the memory elements. It should be noted that an increase in the pulse frequency of a sequential code in order to reduce the time for entering information leads to errors in the lower bits of the memory cells, since the operator cannot react in time to the appearance of the required number in the least significant bit. This circumstance significantly worsens the working conditions of the operator and undoubtedly affects the quality of the decisions made.

The purpose of the invention is to reduce the service time and increase the accuracy of the device.

The goal is achieved by the fact that in the device for controlling the operating time of machines, containing a reference frequency generator, the output of which is connected to the input of a frequency divider, are counting decades by the number of decimal places, each of which contains element AND, the output of which is connected to the first input of element OR, the output of which is connected to the input of the pulse counter, is the first. the element input and the first counting decade are connected to the first output of the frequency divider, the outputs of the pulse counter of all counting decades are connected to the display inputs, the control outputs of the pulse counters of each counting decade are connected to the first inputs of the elements And the next counting decades, the control unit, shift register, former time intervals, elements AND, OR-NOT, the control unit is connected to the input of the shift register and through the time generator to the first inputs of the elements AND, the outputs of which are connected to the second input OR elements E .schetnyh decades, the second inputs of AND gates are connected to the output of OR-NO element, whose inputs are connected to outputs of the shift register and the second inputs of AND gates, the third VHODYkotoryh connected to the second output of the frequency divider.

The drawing shows a block diagram of a device for monitoring the operation time.

The device contains a reference frequency generator 1, a divider 2 frequencies counting decades 3, containing counters 4 pulses, AND 5 and OR shift register 7, shaper 8 time intervals, control block 9, display 10, element OR NOT 1 and element 12.

The device works as follows.

When the reference frequency generator 1 is turned on, the voltage pulses taken from its output are fed to the input of the frequency divider 2, from the first output of which voltage pulses are taken, the repetition frequency of which characterizes the selected unit of time reference, for example, a second. In the current time mode, the shift register 7 is zero, so the voltage is removed from the output of the OR-NOT 11 element (logical 1) coming to the second inputs of the AND 5 elements of all counting decades, the outputs of the 12 elements are absent (logical O) .

Due to this, the voltage pulses taken from the output of the divider frequency 2, through the elements of AND 5 and OR 6 arrive at the input of the first counting decade.

The output pulses of the first counting decade through the series-connected logical elements AND 5 and OR 6 arrive at the input of the second counting decade, etc. down to the last counting decade. From the information outputs of all 4 pulse counters, the time code is fed to the display 10. In the correction mode of the current time, the output from the control unit 9 is reset, the duration of which is proportional to the number to be entered in the first counting decade. The output voltage of the control unit 9 is supplied to the shift register 7 and through the time interval former inputs of the elements I 12. The voltage pulse is removed from the first output of the shift register 7, therefore the output of the OR-NOT element 11 becomes equal to zero, and at the second inputs elements And 5 voltage is absent. At the expense of information about the current time in any of the counting decades is not received.

After a certain time determined by the pulse delay duration, the time interval 8 shaper, the first inputs of the elements And 12 receive voltage, as a result of which the voltage pulses of a certain frequency remove from the second output 12 AND OR. 6 to the input of the first counting decade . The other counting decadal voltage pulses will not be received, since the inputs of the AND elements do not allow the voltage that is removed from the next output of the register 7 shift Since the duration of the voltage pulse removed from the output of the control block 9 is proportional to the number of pulses removed from the output divider 2 frequencies and skidding in the counting decade 3 then at the time of the end of the voltage pulse the output voltage is. the view of the time slot generator 8 also becomes zero. The number entered in the first counting decade 3 is visually controlled on the display 10.

When the second pulse arrives, a voltage appears at the input of the shift register 7 of the time interval shaper at the second output of the shift register 7, the voltage at the first} output becomes equal to 0, the shaper of the time intervals 8 in this case eliminates the influence of the voltage fronts at switching the shift register 7 to the first and second counting decades.

The duration of the pulse removed from the output of control block 9 is proportional to the second number entered in the second counting decade 3. It should be noted that the duration of the pulse that is recorded in counting decades 3 can be set in advance in block 9 of the control.

After some time, determined by the duration of the delay of the pulse of the time interval generator, the voltage enters the inputs of the elements 12 And as a result the voltage pulses of a certain frequency taken from the second output of the splitter 2 frequencies through the elements 12 and OR b arrive at the input of the following counting decade 3. For the other counting decades 3, the voltage pulses will not come, since the inputs of the elements And 12 there is no resolving elements And 12 and there is no permitting voltage, taken from the next output register 7 shift. To enter information

In the subsequent counting steps of the counter, the output voltage of the control unit 9 is removed, the next voltage pulse is taken and the cycle of entry is repeated.

After entering the number into the last counting decade, the 3-shift register 7 is zeroed and the electronic clock operates normally.

Thus, new functional connections between blocks of electronic clocks are made by sequential co0 f.OM entering information separately into each counting decade of the current time counter, which saves the operator's time for correcting the current time of the clock and improves the conditions

5 of his work.

Claims (2)

1. US Patent No. 3594551, cl. 235-92, 1971. 2. The patent of France No. 2039897, cl. H 03 K 23/00, 1971.