JPH01190042A - Time management device - Google Patents

Abstract

PURPOSE:To manage plural external times simultaneously by using a reference time, storing it and managing separately the time difference between the reference time and each external time in the storage of plural external times. CONSTITUTION:Signals 2A, 2B representing external times are supplied from input terminals 1A, 1B and fed to subscribers 14A, 14B in a time difference management means 5. A signal representing a reference time for each time occasion is sent from a timer 13 in a count means 3 to the subtractors 14A, 14B, the time difference between the reference time and each external time is obtained based on the signal 4 and the signals 2A, 2B representing the external times and the result is stored in registers 16A, 16B. In the necessity of storage, the reference time is stored in a memory 20 based on a control signal designating the write operation and the write address from a control signal generating section 17.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a time management device used for recording and referencing communication results of communication equipment in association with time.

BACKGROUND OF THE INVENTION Recently, time management devices have been widely used in the field of communications. The configuration of this time management device is as follows:
2. Description of the Related Art A configuration in which an external time is directly measured by a clock means and recorded/referenced is generally known.

Hereinafter, a conventional time management device will be explained with reference to FIG.

FIG. 3 is a functional block diagram showing the basic configuration of a conventional time management device.

As shown in FIG. 3, the external time 23 input from the input terminal 22 is sent to the timer 24, and the timer 24 is reset using the external time 23 as an initial value. As a result, the clocking means 24 outputs the instantaneous external time 26,
The storage means 26 refers to this as necessary and stores it as the external time at that time. This stored external time 27 can be taken out from the output terminal 28.

Problems to be Solved by the Invention However, with the above configuration, only one external time can be managed at a time, so communication results of multiple communication devices or multiple communication channels of a single communication device cannot be managed. If the external times set for each device or communication channel are different in the case of management, etc., there is a problem in that one of the devices is recorded based on an inaccurate external time.

Conventionally, this problem has been solved by methods such as using multiple time management devices with the above configuration, but
This method has a problem in that the relative context between each external time is not known.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, an object of the present invention is to provide a time management device that can simultaneously manage a plurality of external times and also manage the relative context between the external times. It is something.

Means for Solving the Problems In order to achieve the above object, the present invention includes a timekeeping means for measuring a reference time, and calculates and stores a plurality of time differences between a plurality of external times and the reference time obtained by the timekeeping means. a time difference management means; a storage means for storing a reference time obtained by the time measurement means; and a time calculation for obtaining a plurality of external times based on the reference time obtained by the storage means and a plurality of time differences obtained by the time difference management means. The means are provided.

According to the above configuration, the present invention manages a plurality of time differences between a plurality of external times inputted from the outside and a reference time obtained by the timekeeping means by the time difference management means, and uses the reference time when storing the time. By providing a time calculation means for determining the external time based on the reference time and a plurality of time differences, it is possible to simultaneously manage a plurality of external times and also obtain a reference time that represents the relative context of each external time. This is what I tried to do.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a functional block diagram of a time management device in an embodiment of the present invention.

In FIG. 1, 1 is an input terminal to which information representing a plurality of external times is supplied, 3 is a clock means for supplying information representing an instantaneous reference time, and 6 is a time difference between each of the plurality of external times and the reference time. 7 is a storage means for storing the reference time; 9 is an output terminal to which information representing the reference time is output; 10 is a means for calculating a plurality of external times based on the reference time and a plurality of time differences. time calculation means to
12 is an output terminal to which information representing a plurality of external times is output.

The operation of the above configuration will be explained below.

First, a plurality of pieces of external time information 2 are supplied from the input terminal 1 and sent to the time difference management means 6 . On the other hand, the time difference management means 6 is sent information 4 representing the reference time moment by moment from the timekeeping means 3, and based on this and a plurality of pieces of external time information 2, the time difference between each external time and the reference time is calculated. The time difference information 6 is stored in the time calculation means 1o.
supply to. On the other hand, the storage means 7 receives information 4 representing an ever-increasing reference time from the clock means 3, and stores the reference time when it becomes necessary to memorize it. (For example, if the present invention is used for time management related to communication of communication equipment, this case corresponds to the time when communication is made.) This stored reference time is read out at any time and output as reference time information 8. The signal is output from the terminal 9 to the outside and is also supplied to the time calculation means 10. The time calculation means 10 calculates the external time corresponding to each time difference based on the reference time information 8 and the plurality of time difference information 6 supplied from the time difference management means 6, and outputs it from the output terminal 12 as external time information 11. do.

Note that the formula for calculating the time difference in the time difference management means 5 having the above configuration is based on the following formula (1). (The reference time is Tb, the external time is To, and the time difference is Td.) Td2To −Tb
(1) Also, the formula for external time calculation in the time calculation means 10 is based on the following formula (2). (Reference time is Tb, external time is To'', time difference is Td.
shall be. ) To' = Tb + Td...
(2) Next, FIG. 2 is a block diagram showing the detailed configuration of a time management device according to an embodiment of the present invention. The figure shows a configuration for managing two external times.

In FIG. 2, 1A and 1B are input terminals to which signals representing external time are supplied, respectively. Reference numeral 3 denotes a clock means for supplying a signal representing an ever-increasing reference time, and is constituted by a timer 13. 6 is a time difference management means that calculates and stores the time difference between each of the two external times and the reference time;
A, 14B, registers 16A, 16B.

Reference numeral 7 denotes a storage means for storing the reference time;
7. It is composed of a memory 20. 9 represents the reference time'
This is an output terminal from which a signal is output. 10 is a time calculation means for calculating two external times based on two time differences and a reference time, and is composed of adders 21A and 21B. 12A and 12B are output terminals to which signals representing external time are output, respectively.

The operation of the above configuration will be explained below.

First, signals 2 and 2B representing external time are supplied from input terminals 1 and 1B, respectively, and sent to subtracters 14A and 14B in the time difference management means 6.

On the other hand, the subtracters 14A and 14B are sent a signal 4 representing an ever-increasing reference time from the timer 13 in the timekeeping means 3, and based on this and signals 2A and 2B representing the external time, the respective external times are determined. The time difference between the reference times is determined. Signals 15A and 15B representing these time differences are held in registers 16A and 116B, and are supplied to adders 21A and 21B in time calculation means 10. On the other hand, in the storage device, a signal 4 representing the reference time every moment is sent from the timer 13 in the clocking device 3, and when storage is required, a control signal generator 17 specifies a write operation. The reference time is stored in the memo 1J20 based on a control signal (supplied via the signal line 18) specifying the write address and an address signal (supplied via the signal line 19) specifying the write address.

This stored reference time is updated at any time by a control signal (supplied via signal line 18) specifying a read operation and an address signal (supplied via signal line 19) specifying a read address from the control signal generator 17. is read out from the output terminal 9 as a signal 8 representing the reference time, and is outputted to the outside from the output terminal 9.
0 to adders 21A and 21B. Adder 21
At A and 21B, a signal 8 representing this reference time and a signal 6A representing the time difference supplied from registers 16A and 16B are provided.
, 6B, the external time corresponding to each time difference is determined and output from output terminals 12A, 12B as signals 11A, 11B representing the external time.

In this embodiment, the configuration for managing two external times has been explained. If the configuration includes the same number of times as the number of times, it is possible to manage three or more external times.

As described above, according to this embodiment, the time difference management means 6 that calculates and stores the time difference between the reference time and the external time, and the time calculation means 10 that calculates the external time from the time difference and the reference time are provided. Accordingly, it is possible to simultaneously manage a plurality of external times and obtain a reference time that represents the relative context of these external times.

In the embodiment described with reference to FIG. 2, the time difference management means 6, the storage means 7, and the time calculation means 10 are configured by digital circuits, but these are implemented by a CPU,
It may also be configured using a microcomputer system consisting of ROM, FLAM, etc. By having a configuration in which the time difference with each external time is managed separately, a plurality of external times can be managed simultaneously and their relative contexts can also be obtained, which is highly effective.

[Brief explanation of the drawing]

FIG. 1 is a functional block diagram of a time management device in an embodiment of the present invention, FIG. 2 is a block wiring diagram of a time management device in an embodiment of the invention, and FIG. 3 is a basic diagram of a conventional time management device. FIG. 2 is a functional block diagram showing the configuration. 3... Time measurement means, 6... Time difference management means, 7... Storage means, 10... Time calculation means. Name of agent: Patent attorney Toshio Nakao and 1 other person
l Figure! Figure 2 Figure 3

Claims (1)

[Claims] A timekeeping means for measuring a reference time; a time difference management means for calculating and storing a plurality of time differences between a plurality of external times and the reference time obtained by the timekeeping means; and a storage means for storing the reference time obtained by the timekeeping means. and a time calculation means for calculating a plurality of external times based on a reference time obtained by the storage means and a plurality of time differences obtained by the time difference management means.