SU558258A1 - Electronic clock, adjustable radio time signal - Google Patents

Description

one

An electronic clock is known that contains a radio receiving unit, a correction imimers shaping unit associated with the input of a quartz clock corrector, a cascade frequency divider and an all-frequency frequency divider connected in parallel to the cascade frequency divider.

Known electronic watches have a significant error of reference to the time signals.

The closest to the technical essence of this invention is an electronic clock corrected by radio signals and containing a serially connected reference frequency generator, stored time seconds shaper and stored time scale shaper, a radio receiver, an accurate time memory circuit, a minute correction pulse shaping circuit connected to control circuit, error measurement circuit and waveform and clock movement based on accurate time signals

(one).

However, in these clocks, and checking the scale of the stored time to a single time is not reliable due to the uncertainty of the position and the leading edge of the pulse.

In order to ensure high accuracy of recording accurate and stored time, the offered electronic clock is equipped with a circuit

2

selection of second radio stimuli, whose input is connected to the output of the radio receiver, and its output through the control circuit is connected to the memory circuit of the time signal, the output of which is connected through the same control circuit to the measurement circuit of the error of the clock and the clock, the driver of the seconds of the stored time and with the generator of the stored time scale, the first input of the measurement circuit of the error of reference to the clock travel is connected to the first output of the generator of seconds of the stored time, the second input of the measurement circuit of the error leads to and the clock and coupled to the second output

second generator, stored time, an error compensation circuit, the first input of which is connected to the output of the second generator of the stored time, the second input of the error compensation circuit is connected to the correction input switch, the output of the error compensation circuit is connected to the third input of the second generator of the stored time. The drawing shows a block diagram of an operational clock consisting of a thermostatically controlled quartz oscillator 1, a divider 2 frequencies with a conversion factor / (mid-range 5 with a through transfer, but built on a pulsed potential element with two

steady states (triggers)

counting run; Shaper 3 seconds of stored time, built on six pulse counters with a conversion factor, Shaper 4 scales of stored time, built on three counters with frequency, s and one with decoder and display unit (second, minute, hour) and setting the current time.

The Precise Sec Seconds Allocation Scheme 5 (CTS) is a selector device that selects the exact second time radio signal over a duration. Scheme 6 of forming a minute correcting impulse is selectable; its device, which selects a minute radio signal of exact time by duration. Scheme 7 of the regulation is intended to control the device in dependence on the selected mode of operation. Circuit 8 of the time signal memory is built on pulse counters c and is connected in parallel to the generator of 3 seconds of stored time. Circuit 9 measuring the error of reference and the clock movement includes the counting interval and error error generator, the filling frequency control circuit 10 10 10, 10 Hz, three series-connected error meters c / Ssc 10 and the base 3 counter with decoders and digital indication of the sign and the magnitude of the error of reference.

The error compensation circuit 10 is implemented as a decoder that converts a decimal number into a binary-decimal code, and a polling pulse generation scheme for entering a number in a parallel code into a shaper of 3 seconds of stored time.

The automatic control circuit 11 for turning on the radio receiver according to a predetermined program generates an enable signal to the control circuit 7 for generating a corrective pulse. The control circuit 7 includes logical keys 12-16, memory elements 17-19, operating mode switch 20 SYNCHRONOUS STV operating mode switch 21 MEASUREMENT, START button 22, SYNCHRONIZ operating mode switch 23. The AVT., The code entry switch 24 and the averager 25 for calculating the arithmetic average of the binding.

The device works as follows.

The pulses following with a frequency of 5 MHz, generated at the output of generator 1, arrive at divider 2, from the output of which pulses with a 1 MHz frequency follow arrive at shaper 3 and at circuit 8. Shaper 3 forms stored time securines (CXB) and the specified synchronization grid pulses. Circuit 8 generates exact-time secuses (PTS) synchronized by time-accurate signals from control circuit 7. The shaper 3 and the circuit 8 are two non-slotted circuits with a counting factor / Cc - i 10 that allows you to receive at their outputs pulses that follow at a frequency of 1 Hz (seconds of stored and exact time). All counters are built on G (-triggers, are made on integrated circuits (transistor-transistor logic) and have installation circuits to zero, allowing them to be synchronized at a given moment of time. Former 3 also has circuits that allow you to enter a parallel binary-tenth The code from the error compensation circuit 10. Depending on the code arriving from the circuit 10, the driver 3 changes at its output a temporary position of a second .1:) anim time relative to the second of the exact time at the output of the circuit 8. We are from output f A 3 second stored time signal is fed to the 4th time scale generator that generates units of five ten seconds, one and ten minutes, units and ten hours of the current time and indicates their value on the light panel (for example, 12 hours 35 minutes 59 seconds ), and to scheme 9

measurements of the error of the watch and the clock. The second input of circuit 9 from the output of circuit 8 through circuit 7 (logical key 16) receives a second of exact time. To the third input of circuit 9 from the output of the imaging unit 3, pulses with the following frequencies 10, 10S, 103 rc

Scheme 9 measures the time interval between the seconds of the exact and the stored time (error of reference and movement of the clock). The anchor error value and its sign are read by the operator for further processing (calculation of the arithmetic mean and root mean square error value) or are received in parallel binary part code in averager 25. In averager 25, schema 9 receives values of inaccuracy of anchorage not exceeding 1 ms. The averager 25 calculates the arithmetic mean value of the error of the clock timing by the formula

ten

2 Xi

co - and p10

automatically through the circuit 10 (fig. 1) enters this error into the driver of 3 seconds of the stored time.

Scheme 10 operates in two modes: shifting the scale of the stored time manually (by the operator) of the generator 3 and automatic shift of the scale of the stored time of the generator 3 by the arithmetic average of the reference error calculated by the averager 25.

Claims (1)

The nerve mode of operation of the device allows manually using the switch 24 to enter the arithmetic mean of the anchorage footprint, calculated by the operator, and also to compensate for the radio signal delay on the radio propagation path and in the radio receiver. For this, the operator switches the interrogation pulse 24 from the circuit and enters the calculated arithmetic average of the anchor error in the shaper of 3 seconds of the stored 5 time. To dry the automatic synchronization of clocks with accurate time signals transmitted by time service radios, circuits 5, 6, 7 are used. Precise time signals are broadcast by time service radio stations in the form of pulsed messages once per second for a duration of 100 ms, minute the parcel is allocated in duration (200 ms). A correction signal for the current scale of its time is formed from the minute signal of the exact time received by the radio receivers. Scheme 6 selects minute radio pulses from the exact time signal 20, arriving at its input from the intermediate frequency (IF) output of the radio receiving device, and generates rectangular pulses of 1 ISS duration that coincide with their beginning 25. The fill frequency of the radio pulse is the receiver's IF. The shape of the radio pulse envelope is determined by the parameters of the receiving device and the signal-to-noise ratio on the input of the radio receiver. 30 Intermediate frequency in radio receivers selected 215 kHz, bandwidth 3 kHz. Thus, the rise time of the front frame is in the order of 200 ISS. When selecting an anchor level of Uo 35 0.6 V with a maximum sigpal of 1.2 V, the anchor point will be shifted by about 100 µs relative to the beginning of the minute signal of the exact time. Scheme 5 extracts second signals with a duration of 40 ms and generates rectangular pulses of 1 ISS duration corresponding to their beginning. Circuit 5 is built and works in the same way as circuit 6. The generated pulses from circuits 45 5 and 6 are sent to logical keys 12 and 13. Depending on the selected mode of operation of the device, logic key 14 is used to connect minute or second pulses to signal circuit 8. 50 times the exact time to install its counters in the FLOOR. The device operates in the following modes: synchronization of the time scale of the time signal of the exact time (switch 55 20, SYNCHRONIZE STV), measurement of the error of binding and the clock relative to the signal of the exact time (switch 21, MEASUREMENT). Synchronization of the stored time scale automatically without a part of the operator's QQ according to a given clock correction program (switch 23 SYNCHRONIZ. AVT). Mode SYNHRONP13. The HFC is required for assigning the 05-15 scale of the stored time to the common time scale by the minute signal of the exact time. To this end, when the switch 20 is closed, the resolution potential from memory element 17 receives logical keys 13, 15, and the inhibit potential from logical keys 12, 16. By pressing the button 22, the memory element 18 is transferred to a state in which the logical key 14 receives the resolution potential. Thus, the input of the circuit 8 from the output of the key 14 receives a minute pulse of exact time, setting the counters of the circuit 8 to zero. At the same time, the pulse from the logical key 14 acts on the memory element 19. From the output of the memory element 19, the resolution potential goes to the logical key 15. From the output of circuit 8, the time signal corresponding to the leading edge of a minute pulse delayed by a second is transmitted through the open logical key 15 on the memory elements 19 and 18, setting them to the initial state, and on setting the counters of the imager 3 and the counters of units and tens of minutes for a zero to 4. (The clock and the ten minutes of imaging unit 4 are set manually on the chronometer). Thus, the P1kaly of the device's stored time is linked to the leading edge of the minute radio signal of the exact time. A delay of one second is automatically compensated for in circuit 4 by entering the unit of the counter of tens of seconds into units. To reassign the device, you must press the button 22 again. The MEASUREMENT mode is needed to measure the difference between the second signals generated by the device and the semiconductor radio signals of the exact time. In this mode, it is possible to determine the error in sticking the device to the signals of the exact time, the error in the course of the device and calculate their arithmetic and root-mean-square values. Knowing the course of the clock makes it possible to interpolate and extrapolate the correction for any moment in time and compensate for it when minimizing time under bad conditions of radio wave passage and thereby significantly increase the noise immunity and reliability of the Spray. In order to eliminate errors due to interference, the determination of the anchor error and the progress of the device is carried out on the basis of a set of measurements performed by the operator. When operating in the MEASUREMENT mode, the switch 21 sets the memory element 17 to the position at which the permitting potential enters the logical keys 12 and 16, and the logical key 1 13, 15 - the inhibitory potential. When the button 22 is pressed from the memory element TP 18, the current potential key receives the logical key M. At the same time, from the circuit 5, the keys 12 and 14 through the logic keys of the circuit 12 reset the counters of the second pulses. From the output of the circuit 8, the pulses corresponding to the leading edges of the second exact-time pulses, delayed by one second, are received through the logical key 16 to the circuit 9 for measuring the error of reference and the movement of the clock. At the same time, the pulse from the logical key 16 is fed to the memory element 18, returning it to the initial state. To re-measure the fixture error, you need to press button 22 again. Thus, in MEASUREMENT mode 9, a second impulse corresponding to the leading edge of the second of the exact time and the second signal of the stored time from the imaging device 3 arrive. The third mode of operation of the device is synchronization of stored scraps time automatically without the operator’s participation according to the set clock correction program - SYNCHRONIZ. AUT. necessary to maintain the required accuracy of the click on an unlimited time interval without the participation of the operator. This mode allows the device to be used in automated control systems. In SYNCHRONIZE mode. AUT. the switch 23 is stopped at a position in which the permit potential arrives at the circuit 11. The automatic control circuit 11 generates, according to a predetermined program, a potential potential fed to the control circuit 7 to form a minute correction impulse and to the radio control unit to turn it on. In scheme 7, the control pulse acts on the memory elements 17 and 18 so that the logical keys 13, 14 and 15 are open to pass the corrective minute pulse from the circuit 6. The device then works in the same way as in the SYNC mode. STV The use of new schemes and elements in the device: the second-time signal allocation circuit of the exact time, the lock error measurement circuit and the clock run, the error compensation circuit, the averager and the RPU automatic turn-on circuit — allows calculating the average time and clock corrections for the exact time signal transmission session. through the error compensation scheme, introduce this correction into the scale of the formation of seconds of the stored time. As a result, the uncertainty of the reference of the time scale to the minute signal of the exact time or interference is eliminated and the accuracy of the reference is improved compared to the prototype when interference is exerted on the exact time signal. An electronic clock, corrected by radio signals of a precise time, containing a series-connected reference frequency generator, a seconds generator of stored time and a stored time scale generator, a radio receiver, an exact time signal storage circuit, a minute correction pulse shaping circuit connected to a control circuit, and a fault measurement circuit adjusting the clock and clock signals to the exact time, the input correction switch, characterized in that, in order to ensure high accuracy of the accurate and stored time scales, they are equipped with a selection circuit of second radio pulses, the input of which is connected to the output of the radio receiver, and its output through the control circuit is connected to the exact time signal storage circuit, the output of which is connected through the same control circuit to the lock error measurement circuit and the clock run, with the seconds generator of the stored time and with the shaper of the stored time scale, the first input of the lock error measurement circuit and the clock flow of the clock with the first output of the shaper seconds of the stored time, the second input of the lock error measurement circuit and the clock is connected to the second output of the stored time generator, the error compensation circuit, the first input of which is connected to the output of the stored time seconds generator, the second input of the error compensation circuit is connected to the correction input switch, output The error compensation circuit is connected to the third input of the generator of the seconds of the stored time. The source of information taken into account in the examination. 1. Portable quartz watch. “Measuring equipment number 7, 1964, p. 30 (prototype).