JPS62187280A - Time synchronizing device - Google Patents

Abstract

PURPOSE:To synchronize automatically the time of plural information processors in automatic operation with one another by incorporating a timer circuit and supplying time information to other plural information processors. CONSTITUTION:Clock pulses sent by an oscillator 2 are frequency-divided by a frequency circuit 3 into a clock of frequency suitable to a timer circuit 5 and information processors 9 and 10. Those frequency-divided clock pulses are sent to the processors 9 and 10 through a clock pulse sending circuit 4. The processors 9 and 10 operate the internal timer circuit with the clock pulses 11. The circuit 5 operates with the clock pulses which are frequency-divided by the circuit 3 and its time information 12 is supplied to the processors 9 and 10 through a time information sending circuit 6. Even if the processor 10 stops operating temporarily and a difference in time from the time of the device 9 is generated, the time information 12 is received from the circuit 6 when operation is restarted and a timer circuit in the processor 10 becomes equal to time information 12, so that time synchronism is obtained between the processors 10 and 9.

Description

DETAILED DESCRIPTION OF THE INVENTION 1. Field of Industrial Application The present invention relates to a time synchronization device that synchronizes time information between a plurality of information processing devices each having a built-in time measurement circuit.

[Conventional technology]

Conventional time synchronization devices synchronize the times of a plurality of information processing devices by sending only synchronization clock pulses to the clock circuits built into the devices.

[Problem that the invention seeks to solve]

Therefore, this conventional time synchronization device is effective when the information processing device is in operation. However, if an information processing device stops operating at night or on a holiday, the timekeeping circuit built into the information processing device will no longer operate, and the circuit that receives clock pulses from the time synchronization device will no longer operate.
Each device operates using its own clock, making it impossible to synchronize the time with other devices. Therefore, when the information processing equipment resumes operation, there will be a difference in the time information of the clock circuits in each information processing equipment, and it is necessary to manually enter accurate time information and synchronize the times. However, there were problems in that it was not labor-saving and was not suitable for automatic driving.

An object of the present invention is to provide a time synchronization device that supplies accurate time information and clock pulses to a plurality of autonomously operating information processing devices each having a built-in timekeeping circuit, thereby making it possible to synchronize the time of each information processing device. Our goal is to provide the following.

Means for Solving Problems] The apparatus of the present invention includes a signal generating means for generating a fundamental frequency signal, and a clock pulse is generated by dividing the fundamental frequency signal supplied from the signal generating means to generate time information. a frequency dividing means for correcting the phase of a clock pulse in response to the supply of a correction signal; a first distribution means for receiving the clock pulse and distributing it to an external device; and a timekeeping means in response to the supply of the clock pulse. a second distribution means for distributing time information to the external device in response to the supply of the time information; and a second distribution means for generating the time information in response to the supply of the time information and a time signal from the outside. Embodiment 1 An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of a time device according to the present invention.

The time synchronization device 1 of this embodiment includes a high-precision oscillator 2,
A frequency dividing circuit 3 that divides the frequency of the clock pulse output from the oscillator, a clock pulse sending circuit 4 that sends the divided clock pulse to the Ike device, and a timekeeping circuit that keeps time using the divided clock pulse. 5 and clock circuit 5
a time information sending circuit 6 that sends out time information to other devices; time information from the time measurement circuit 5 and time signal 1 from an external clock 8;
3 and a time adjustment circuit 7 which instructs the frequency dividing circuit 3 to make corrections in order to synchronize with the accurate time of an external clock 8.

Next, the operation of this embodiment will be explained.

A plurality of information processing devices 9 and 10 and an external clock 8 are connected to the time synchronization device 1 . The clock pulse emitted from the oscillator 2 is passed to the clock circuit 5 by the frequency divider circuit 3.
And the frequency is divided into a clock having a frequency suitable for the information processing devices 9 and 10. This frequency-divided clock pulse is transmitted to the information processing devices 9 and 1 via the clock pulse sending circuit 4.
Sent to 0.

In the information processing devices 9 and 10, the clock circuit 5 is operated by the clock pulse frequency divided by the divide-by-6 circuit 3, which operates the built-in clock circuit by the clock pulse 11, and the time information is sent to the time information sending circuit 6. If the information processing device 10 temporarily suspends operation,
Since the clock pulse 1] cannot be received, the internal clock circuit of the information processing device 10 operates using the clock within the device, and the time cannot be synchronized with the information processing device 9, resulting in a time difference.

After that, when the information processing device 10 resumes exercise, it receives the time information IJvI 12 from the time synchronization device l, and the time of the clock circuit built in the information processing device 10 is determined by the time information 12.
is equal to Since the information processing device and the clock circuit 5 are operated by the same oscillator 2, their times are synchronized.

In this way, the information processing device 10
You can synchronize the time with

In addition, the time signal 13 from the external clock 8 and the time information from the clock circuit 5 are compared in the time correction circuit 7 and an error is calculated, and the clock pulses of the frequency dividing circuit 3 are fast-forwarded or slow-forwarded so as to correct the error. Give a signal to give instructions.

[Effects of the Invention] As explained above, the present invention has a time synchronization device equipped with 31
Built-in time circuit, Ike's multiple information processing devices
By supplying clothes, it is possible to automatically synchronize the times of multiple information processing devices under automatic operation.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of a time synchronization device according to the present invention. DESCRIPTION OF SYMBOLS 1... Time synchronization device, 2... Oscillator, 3... Frequency dividing circuit, 4... Clock pulse sending circuit, 5... Time measuring circuit, 6... Time information sending circuit, 7. ... Time adjustment circuit, 8... External clock, 9... Information processing device, 10
... Information processing device, 1] ... Kuro Tsuku Pulse, 1
2...Time information, 13...Time signal. Group I

Claims (1)

[Scope of Claims] Signal generating means for generating a fundamental frequency signal; and a clock pulse is generated by frequency-dividing the fundamental frequency signal supplied from the signal generating means, and the clock pulse is generated in response to the supply of a time information correction signal. a first distribution means that receives the clock pulse and distributes it to an external device; a clock means that measures time and generates time information in response to the clock pulse supply; a second distributing means that receives the time information and distributes it to the external device; and generates a time information correction signal that corrects the time information in response to the time information and the external time signal signal. A time synchronization device comprising: time adjustment means.