SU602911A1 - Time interval extreme meter - Google Patents

Description

The drawing shows the scheme of the described device. The first output of the input driver 1 is connected to the first control input of the valve 2 connected between the output of the generator 3 and the counting input of the counter 4, connected by its code output directly and through the code 5 census gates and the register 6 with both inputs of the code comparison circuit 7. The second the output of the input shaper 1 is connected to the first inputs of the gating unit 8 and the synchronization unit 9. The output of the code comparison circuit 7 is connected via a prohibition circuit 10 to a single input of the equality equality trigger 11, whose output is connected to the control trigger input 12 of the code rewriting control, outputs Pu Q of which are connected to the signal inputs of the signal switch 13. The second input of the synchronization unit 9 is connected to the output of the valve 2 and to the second input of the inhibit circuit 10. The first output of the synchronization unit 9 is connected to the clock input of the trigger 12 control census code. The second output of the synchronization unit 9 is connected to the signal input of the valve 14 of code census resolution, the control input of the latter is connected to the output of the signal switch 13, and its output to the second input of the gating unit 8. The third output of the synchronization unit 9 is connected to the installation input of the counter 4 and c zero input trigger 11. The first output of gating unit 8 is connected with the second control input of valve 2, and the second output is connected with the control input of signal switch 13. Input 15 of the input shaper 1 is given a sequence time intervals T in the form of a pulse following period or pulse duration, and the input 16 is a signal for selecting the type of time interval. The input 17 of the gating unit 8 receives a signal, the duration T of which determines the gating interval of a sequence of time intervals arriving at input 15. During the gating interval T from this sequence of time intervals and their limit values are determined. Signal switch input 18 serves as an input for selecting a type of limit value of a time interval (maximum or minimum) measured by the device. Index 19 denotes device output. When the signal "1" is fed to the input 16, the device measures, on the interval T, the limit value of the time interval specified by the follow-up period of 7 pulses, and when the signal "O" is indicated, the limit value of the time interval specified by the duration g of pulses. The signal "1 at input 18 corresponds to the measurement of the minimum time interval from a sequence of time intervals during T, and the signal" O - the maximum time interval. The device works as follows. In the absence of a gating signal at input 17, valve 2 is blocked by the signal "O" coming from the first output of gating unit 8, and register 6 stores the result code of the previous measurement, the incoming output 9 of the device. The input driver 1 generates at its second output on the leading edge of the signals arriving at its input 15, pulses of a fixed duration. When a sequence of time intervals is specified, in the form of a period of 7V pulses, a single signal is fed to the input 16 of the input forral logger 1. The latter passes to the first output of the input driver 1 and unlocks the valve 2 on the first control input. When a single signal is applied to the input 17, which specifies the gate interval T of the sequence of time intervals, the gate unit 8 by the first pulse from the second output of the input driver 1 generates at its first output, the signal “1, unlocking valve 2 through the second control input. In the initial state, a second signal is present at the second output of the gating unit 8, which passes through the control input of the signal switch 13 to its output and unlocks the code census resolution valve 14. With the arrival of the pulse defining the interval T, the synchronization unit 9 is driven to the input 15 at its first input and the falling edge of the first pulse from the generator 3 through the unlocked valve 2 to the second input of the synchronization unit 9 is impacted at the first output of the last pulse, which enters the clock input of the trigger 12 control census code and sets it to the state corresponding to the state of the trigger 11 fixing equality of codes. The duration of this pulse does not exceed half the length of the pause between the pulses of the generator 3. A pulse at the first output of the synchronization unit 9 generates a pulse at its second output, which passes through the unlocked code census resolution valve 14 to the second input of the gating unit 8 and is stored in it. In addition, this pulse goes to the control inputs of code 5 census gates, as a result of which the code recorded in counter 4 is rewritten to register 6. The total pulse duration at the first and second outputs of synchronization unit 9 does not exceed the length of the pause between generator pulses 3. At the third output of the synchronization unit 9 generates a pulse corresponding to the phase and duration of the second pulse at the output of the valve 2. This pulse arrives at the installation input of the counter 4 and the zero input of the trigger 11 fixing equality code s, set the latter to the zero initial state corresponding to one unit of the account. After this, counter 4 begins to count the pulses arriving at its counting input. The counting continues until the next pulse arrives at input 15. Upon the arrival of this pulse, a synchronization unit 9 is triggered, sequentially forming pulses on its three outputs, as described above.

The impulse from the second output of the synchronization unit 9 through the unlocked code census resolution valve 14 again goes to the second input of the gating unit 8 and controls the inputs of the code census gates 5. As a result, a single signal is output at the second output of the gating unit 8, and the register 6 is written code from counter 4, corresponding to a period of 7 ;,.

When a single signal is fed to the input 18 of the signal switch 13, the signal from the output of the census control trigger 12 is switched to its output. This mode of operation of the device corresponds to the mode of measuring the minimum time interval from their sequence G for the interval of gating T.

After the second trigger of the synchronization block, the code dialed by the counter 4 is continuously compared using the code comparison circuit 7 with the code written in register 6 and corresponding to the duration of the preceding period 7.

If by the time the third pulse arrives at the input 15, i.e. by the time of the third trigger of the synchronization unit 9, the number dialed by the counter 4 does not exceed the number recorded in register 6, then at the output of the code comparison circuit 7 the code equality signal is not generated, as a result which, at the output of the inhibit circuit 10, blocked during the switching of the counter by 4 pulses from the counting input of the latter, a signal appears, and the equality check trigger 11 remains in the zero state. As a result, after the third triggering of the synchronization unit 9, the code control trigger 12 is in the zero state. This means that the length of the period 7x measured by this time is less than the previous one, i.e. the period decreases and the code from the counter 4 is rewritten to register 6.

If the subsequent period 7 is greater than the previous one, then until the third pulse arrives at input 15, the number dialed by counter 4 is compared with the number recorded in register 6, and at the time these numbers are equal, a single signal appears at the output of prohibition circuit 10 the trigger 11 fixing the equality of the codes into one state. Then, after the third triggering of the synchronization unit, the code control trigger 12 is set to one. As a result, at the output of the signal switch 13, a zero signal is generated, blocking valve 14 of the code census resolution. In register 6, there remains a number corresponding to a smaller period value of 7.

If until the end of the gating interval 7 specified by the input 17 of the gating unit 8. The duration of the time intervals T at the input 15 will exceed the value recorded in register 6, then the code will not be rewritten, and

after the end of the gating interval T in register 6, the smallest of the sequence of time intervals is recorded, the value of interval 7, which can be removed from exit 19.

When a single signal is removed from input 17, which sets the gating interval T., with the first pulse from the second output of the former 1, the zero signal from the first output of the gating unit 8 is blocked, and the measurement process ends.

When measuring the maximum time interval T, the device works in a similar way from their sequence. In this case, a zero signal is supplied to the input 18 of the transducer of the signal 13, as a result of which the signal from the output Q of the code control flip-flop 12 is switched to the output of the latter. In this case, the signal of the census-code will be as long as the trigger 12 is after the operation of the synchronization unit 9 remains in one state. This means that the number dialed by counter 4 exceeds the number recorded in register 6. As soon as this number decreases, the output of the code comparison circuit 7 does not form a signal of equality and the flip-flop 2 will be in the zero state. Code census permission will be off.

When specifying a sequence of time intervals at the input 15 in the form of a pulse duration Td, a zero signal is applied to the input 16 of the driver 1 and a single signal is generated at its first output, which unlocks the valve 2 for a time equal to the duration t of the input pulse. Otherwise, the operation of the device is not different from that described above.

Claims (2)

Invention Formula A limit meter for intermittent intervals containing a generator connected through a claian to a counter input, code rewrite gates, whose inputs and output are connected to the counter outputs, and control inputs are connected to the output of a code rewriting authorization, gating unit, synchronization unit, and its first 1m output () d () m with a clock input of the control trigger and a code recording, the second with a signal input of the code census resolution valve and a third with a mounting input of the above counter, characterized in that the functionality. It is equipped with an input driver with signal and control inputs, a code comparison circuit, a register, a inhibitor circuit, a code equality trigger and a signal switch, the first output of the input driver is connected to the first control input of the valve, and the second with the first inputs of the gating unit and the synchronization unit, the first input of the inhibit circuit is connected to the output of the code comparison circuit, including the outputs between the counter and register outputs, the second to the valve output and to the second one synchronization block, and its output to one of the inputs of the equality fixation of equality of codes, another input connected with the third output of the synchronization block, and the output to the control input of the census control trigger, the outputs of the latter are connected via a switch of signals to the control input code resolution valve, the output of which is connected to the second input of the gating unit, the first output of which is connected to the second control input of the valve, the second to the control input of the signal switch, and the outputs tiley code Census - with the register inputs, wherein the input device inputs are input shaper. Sources of information taken into account in the examination: 1. USSR author's certificate number 409188, cl. G 04 F 10/04, 1973. 2. Novitsky P. V. and others. Digital devices with frequency sensors. L., “Energie, 1970, p. 350-353.