JP2008009684A - Attendance management system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent alteration of attendance times in an attendance management system. <P>SOLUTION: The current display time (a first time) of the attendance management system is stored, and the display time of the system a predetermined time after the first time is stored. When the time difference between the first time and the second time exceeds an allowable time, it is determined the display time of the attendance management system is illegally operated to alter the work starting and ending times to output an alarm. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an attendance management system. More specifically, the present invention relates to a system that prevents falsification of work time.

An attendance management system using a general-purpose computer system is known (see Patent Document 1). In this time management system, a worker directly accesses the time management system and records his / her attendance time.
The time recorded by the attendance management system in this way is based on the time of the system clock of the computer system.
JP-A-2005-135296

However, in a general-purpose computer system, the system clock can be easily changed. Accordingly, there is a possibility that the worker changes the time of the system clock of the computer system illegally, and thus falsifies his / her attendance time on the attendance management system based on the time.
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to prevent the attendance time from being altered in the attendance management system.

The present invention has been made to solve the above problems, and the first configuration thereof is defined as follows.
In a time management system in which time management means for managing time of attendance is incorporated in a computer system, a system clock for managing the time of the computer system and the system clock or the first time of the time management means are stored. Calculating means for calculating a difference time between the first time storage means, the first time, and the second time of the system clock or the attendance management means after a predetermined time has elapsed from the first time; An attendance management system comprising: a permissible time storage unit that stores a permissible time in which time change is permitted; and an alarm unit that outputs an alarm when the difference time exceeds the permissible time.

  According to the first aspect, for example, the current display time (first time) of the attendance management system is stored in the first time storage means, and a predetermined time (from the time when the first time is stored) For example, the display time (second time) of the system after elapse of 10 seconds is stored. The time difference (difference time) between the first time and the second time is originally 10 seconds. At this time, if the time of the attendance management system is illegally changed, the time difference greatly exceeds 10 seconds. Therefore, when the time difference exceeds a predetermined allowable time, it is determined that the display time of the attendance management system has been illegally manipulated in order to falsify the attendance time, and an alarm is output. As a result, the manager can grasp the fact that the work time has been falsified. In addition, as an effect of facilitating the grasp of the fact of falsification, falsification of work time by workers is prevented.

In the above description, the reference first time is extracted from the attendance management system, but if the time displayed by the attendance management system is synchronized with the system clock of the computer system, the display time of the system clock May be adopted at the first time. Similarly, the display time of the system clock can be adopted as the second time.
The time interval (predetermined elapsed time) for checking the second time on the basis of the first time can be arbitrarily set. For example, it can be set to 1 to 100 seconds. Also, the allowable time recorded in the allowable time storage means can be arbitrarily set, for example, 1 to 15 minutes.
An alarm output method can also be arbitrarily selected. For example, a buzzer may be sounded, a predetermined alarm may be displayed on a display of a computer system, and an alarm content mail may be transmitted to an administrator's computer system or portable terminal.

If the difference time between the first time and the second time is always calculated, the burden on the computer system increases. From the viewpoint of reducing the burden, as defined in the second aspect of the present invention, It further comprises change detection means for detecting that the time of the system clock has been changed and outputting a first trigger signal, and the computing means is the first time and the second time only when the first trigger signal is received. It is preferable to calculate the difference time from the time.
In a general-purpose computer system, when the time of the system clock is changed, the fact of the change is output as a log file and stored in a predetermined memory. If the difference time between the first time and the second time is calculated using the output of the log file as a trigger, the burden on the computer system can be reduced.

  Further, it is preferable to save the fact that an alarm is output in association with a log file relating to the change of the system clock (see the third aspect). As a result, the manager can check the fact of falsification not only when the attendance time has been falsified, but also after that.

Examples of the present invention will be described below.
FIG. 1 shows a block diagram of an attendance management system 10 of the embodiment. FIG. 2 is a schematic diagram of the attendance management system 10.
In FIG. 1, the attendance management system 10 includes a control unit 11, a display unit 21, an input unit 22, a system clock 23, a calculation unit 31, an alarm output unit 32, and a storage unit 40.
Hereinafter, the control part 11 which demonstrates each element of the attendance management system 10 is provided with CPU12. This CPU 12 is connected to each element constituting the attendance management system 10 via a bus, and performs overall control thereof.
The display unit 21 is a device for displaying the contents of the attendance management system 10 on a display. For example, a liquid crystal display is used.
The input unit 22 is a device for operating a computer system in which the attendance management system 10 is incorporated. For example, an input device such as a keyboard or a mouse is used. The input unit 22 may be connected to a card reader that reads a worker's ID card. In addition, the worker can be specified based on the worker's physical characteristics. The attendance management system recognizes the time at which the worker is specified by the card reader as the attendance time or the leaving time of the worker.

The system clock 23 generates a timing clock for the computer system in which the attendance management system is incorporated.
The computing unit 31 computes the difference time between the first time and the second time, and compares the difference time with the allowable time. When the difference time exceeds the allowable time, a signal is input to the alarm output unit 32. When this signal is input, the alarm output unit 32 outputs an alarm. The mode of alarm output is not particularly limited. For example, a warning screen may be output on the display or a warning sound may be emitted.

The storage unit 40 includes a control program storage area 41, an attendance management program storage area 42, a first time storage area 43, a second time storage area 44, a difference time storage area 45, and an allowable time storage area 46. A storage device such as a general hard disk is used for the storage unit 40. Hereinafter, each storage area will be described.
The control program storage area 41 is an area in which a control program for the CPU 12 is stored. This control program is a program for comprehensively controlling each element connected to the control unit 11.
In the attendance management program storage area 42, a program for operating the attendance management system 10 is stored. In the first time storage area 43, the time displayed by the attendance management system 10 is always updated and stored. The time displayed by the attendance management system every predetermined time (for example, 10 seconds) with the first time as a reference is stored in the second time storage area 44 as the second time. The difference time between the first time and the second time is stored in the difference time storage area 45. The allowable time compared with the difference time is stored in the allowable time storage area 46. Although this permissible time can be set arbitrarily, it is preferably 1 to 15 minutes.

FIG. 3 is a flowchart showing the operation of the attendance management system 10.
The current time displayed in the attendance management system is stored in the first time storage area 43 as the first time (step 1). The current time of the attendance management system is synchronized with the system clock of the computer system. That is, since the display time of the attendance management system is equal to the display time of the system clock, the current time of the system clock can be set as the first time.
Next, after a first time is stored, when a predetermined time (for example, 10 seconds) elapses, the current time of the attendance management system is read and stored in the second time storage area 44 as a second time. (Step 3).

  In step 5, the difference between the first time and the second time is calculated, and the result is stored in the difference time storage area 45. In step 7, the difference time stored in the difference time storage area 45 is compared with the allowable time stored in the allowable time storage area 46. When the difference time exceeds the allowable time (step 9: Y), an alarm is assumed that the display time of the attendance management system has been illegally changed or the display time of the system clock of the computer system has been illegally changed. A signal is sent to the alarm output unit 32 (step 11). The alarm output unit 32 displays a predetermined message on the display based on the alarm signal (step 13). When the difference time does not exceed the allowable time (step 9: N), step 5 and subsequent steps are repeated.

FIG. 4 is a block diagram of an attendance management system 100 according to another embodiment. The same elements as those in FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted. FIG. 5 is a schematic diagram of the attendance management system 100.
The attendance management system 100 further includes a change detection unit 33 and a change history storage area 407.
The change detection unit 33 detects that a change has occurred in the system clock 23 of the computer system, and notifies the calculation unit 31 of the change. Upon receiving the change notification, the calculation unit 31 immediately calculates the difference time between the first time and the second time. Thereby, it is not necessary to always calculate the difference time between the first time and the second time, and the burden of the calculation process is reduced. The change detection unit 33 that has detected that the time of the system clock 23 has been changed stores the changed time in the history change storage unit 407.
The history change storage area 407 is an area for storing the warning output from the alarm output unit 32 and the change detection time causing the warning in association with each other. Thereby, the person who operated the attendance management system at this time can be specified. The fact that a person who has performed such an operation can be identified becomes known, so that tampering by workers can be prevented in advance.

FIG. 6 is a flowchart showing the operation of the attendance management system.
The current time displayed in the attendance management system is stored in the first time storage area 43 as the first time (step 21). The current time of the attendance management system is synchronized with the system clock of the computer system. That is, since the display time of the attendance management system is the same as the display time of the system clock, the current time of the system clock can be set as the first time.
Next, after the first time is stored, when a predetermined time has elapsed, the current time of the attendance management system is read and stored as the second time in the second time storage area 44 (step 23).

When the change detection unit 33 detects a change in the system clock 23 (step 25: Y), the calculation unit 31 calculates the difference between the first time and the second time, and the result is stored in the difference time storage area 45. Save (step 27). Then, the difference time stored in the difference time storage area 45 is compared with the allowable time stored in the allowable time storage area 46 (step 29). When the difference time exceeds the allowable time (step 31: Y), it is considered that the display time of the attendance management system has been changed directly or illegally, or the display time of the system clock of the computer system has been changed illegally. An alarm signal is sent to the alarm output unit 32 (step 33). The alarm output unit 32 displays a predetermined message on the display based on the alarm signal (step 35). Further, the message (warning) and the change detection time are stored in association with each other (step 37). When the change detection unit 33 does not detect a change in the system clock 23 (step 25: N), or when the difference time does not exceed the allowable time (step 31: N), step 25 and subsequent steps are repeated.
From the above, the administrator can immediately confirm the falsification of the system clock by the worker and can store the fact of the falsification. Thereby, the fact of falsification can be checked at a later date.

  The present invention is not limited to the description of the embodiments and examples of the invention described above. Various modifications may be included in the present invention as long as those skilled in the art can easily conceive without departing from the description of the scope of claims.

FIG. 1 shows a block diagram of an attendance management system 10 of the present invention. FIG. 2 is a schematic diagram of the attendance management system 10. FIG. 3 is a flowchart for explaining the operation of outputting an alarm from the attendance management system when the system clock is altered. FIG. 4 is a block diagram of the attendance management system 100 of the present invention. FIG. 5 is a schematic diagram of the attendance management system 100. FIG. 6 is a flowchart showing the operation of the attendance management system.

Explanation of symbols

10 100 Attendance management system, 23 system clock, 31 calculation unit 32 alarm output unit, 33 change detection unit, 40 storage unit

Claims (3)

In a time management system in which a time management means for managing time of work is incorporated in the computer system,
A system clock for managing the time of the computer system;
First time storage means for storing a first time of the system clock or the attendance management means;
A computing means for computing a difference time between the first time and the second time of the system clock or the attendance management means after a predetermined time has elapsed from the first time;
An allowable time storage means for storing an allowable time in which the time change is allowed;
An attendance management system comprising: alarm means for outputting an alarm when the difference time exceeds the allowable time.   It further comprises change detection means for detecting that the time of the system clock has been changed and outputting a first trigger signal, wherein the calculation means receives the first trigger signal and the first time The attendance management system according to claim 1, wherein a time difference from the second time is calculated.   The attendance management system according to claim 2, further comprising storage means for receiving the first trigger signal and storing the time of the system clock in association with an alarm.

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