JP3410362B2 - VDT work motion measurement system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measuring system for inspecting visual acuity, reflex motor function, etc., which is performed as a health checkup of a VDT (image display means) operator.
Not only the health checkup of VDT workers, but also the visual acuity of children who are absorbed in video games and elderly people whose physical strength has declined.
The present invention relates to a system capable of evaluating reflex motor function and the like.

[0002]

2. Description of the Related Art Conventionally, this kind of inspection of visual acuity, reflex motor function and the like has been performed individually by using different devices such as a visual acuity meter, an adjusting near point inspection device and a reflex motor function measuring device. It was done in a separate environment where it was installed. Also, VD
The subjective data based on the self-report of the VDT operator occupy an important part of the health checkup of the T-worker in order to determine how much work and how much fatigue he has had.

[0003]

However, each of the above-described conventional inspection devices is a single-function device, and the items that can be inspected are limited. It was necessary to prepare multiple types of inspection devices. Further, with the conventional device, the online inspection in the VDT working posture is impossible, and the subject needs to press the face and eyes against the specific peephole to undergo the inspection. In addition, the types of patterns that can be presented are limited, and the variable range of the presentation speed and the presentation position is also limited.

Further, in the method based on the self-declaration of the VDT worker described above, there is a fear that the declared work time is not only the VDT operation time but also the total time including rest time and other required working time. Yes, and in some cases, arbitrary data was included, and it was often difficult to call it an objective judgment.

Furthermore, there has been no device that identifies individual VDT workers and continuously measures the degree of fatigue for each person over intermittent periods of operation.

An object of the present invention is to enable a plurality of inspections such as measurement of visual acuity and accommodation near point, measurement of reflex motor function and the like to be carried out by one measurement system, and online inspection in a VDT working posture. It is to provide a VDT work motion measuring system.

Further, an object of the present invention is to identify individual VDT workers, and to determine the data of the degree of fatigue with respect to each person's intermittent operation time without being influenced by the subject's subjective data or arbitrary data. An object of the present invention is to provide a VDT work motion measuring system that can be objectively and continuously measured for a long period of time.

[0008]

In order to solve the above problems, the present invention has the following structure.

That is, the VDT (image display means) and the VD
A computer for generating and displaying a target pattern of a predetermined shape, size, and color on the screen of T under desired conditions and for processing the measured data, a subject operating the computer, and the screen of the VDT. Based on a signal from the computer, the image forming position of the real image or the virtual image of the visual target pattern displayed on the screen of the VDT is arranged between
Variable focus means that is variable according to control, input means that inputs the response of the subject, and the variable focus means that is driven based on the signal from the computer and that detects the response signal of the subject from the input means, and the computer By transmitting an interrupt signal to the variable focus means to stop or move the image forming position of the variable focus means or the moving speed of the image forming position of the variable focus means is identified, and the identified image forming position or image forming position And a response synchronization control means for transmitting the moving speed to the computer.

Further, there is provided distance measuring means for measuring the distance between the subject and the screen of the VDT.

Further, the distance measuring means installs a plurality of sensors for measuring the distance from the screen of the VDT to the subject's eyes, face or head, in the vicinity of the screen of the VDT, and uses the principle of triangulation. It was used as a means to calculate the distance.

Further, the response synchronization control means controls the distance measuring means, measures the distance from the screen of the VDT to the subject's eye, face or head, and transmits the measured data to the computer. The measuring means control means was provided.

Further, there is provided means for accumulating personal data for each subject for a long period of time, analyzing the characteristics of the personal data, and comparing / determining the work motion characteristics based on the characteristics.

Further, a voice guidance function is provided for informing the subject of examination / operation procedures.

Further, the input means is any one of a keyboard, a joystick, a mouse, and a microphone, or has a function of detecting a motion of a body part such as a foot or a head which the subject can intentionally move.

Further, an IC card transmitting / receiving device for wirelessly receiving the personal information from an IC card for storing the personal information of the subject, means for identifying and storing the received personal information and the time of reception, and being stored in the computer. The test subject data is transmitted to the IC card and stored in the IC card.

According to the above configuration, when the subject looks at the imaged target pattern and determines that the desired condition is satisfied, a specific key on the keyboard is pressed, a joystick button is pressed, or a mouse is pressed. Or click
The test can be performed by uttering a specific voice into the microphone or by moving a part of the body such as the foot or head that the subject can consciously move, so not only the visual acuity test for still images and moving images, but also the reflex motor function. It is possible to perform a dynamic inspection such as measurement, and a plurality of inspection items can be realized by one measurement system.

Further, in this configuration, since it is sufficient to attach the variable focus means to the VDT screen used for the work by using a simple band or metal fitting, and to display the pattern on the VDT screen, the VDT worker actually In the posture and environment during the VDT work, the visual acuity and reflex motor function can be inspected online at any time.

Further, each VDT worker is identified, personal data for each subject is accumulated for a long period of time, the characteristics of the personal data are analyzed, and the work motion characteristics based on the characteristics are compared and judged by means of each means. The data of the degree of fatigue with respect to the intermittent operation time of a person can be measured objectively and continuously for a long time without being influenced by the subjective data or arbitrary data of the subject.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a VDT work motion measuring system of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows an example of an embodiment of a VDT work motion measuring system according to the present invention. In the figure, 1 is a variable focus means, 2 is a response synchronization control means, 3 is a distance measuring means, 4
Is a computer, 5 is a VDT, 6 is a microphone, 7
Is a keyboard, 8 is a mouse, 9 is a joystick, 1
0 is the IC card, 11 is the base station of the IC card receiving circuit,
12 is an antenna, 13 is a speaker, and 14 is a subject.

The Landolt ring used in the inspection, the visual target pattern indicating characters, symbols, and the like are VD by the CPU of the computer 4 and the measurement software executed on the CPU.
It is drawn at T5.

The variable focus means 1 is for changing the image forming position of the real image or virtual image of the visual target pattern displayed on the screen of the VDT 5, and V is formed by using a simple band or metal fitting.
The subject 14 is attached to the DT 5 and the subject 14
It is configured to view the optotype pattern displayed through. Therefore, by changing the image forming position of the variable focus means 1, a real image or a virtual image of the target pattern can be formed at a predetermined position in the image forming space from the subject's eye to the infinity. .

As the variable focus means, for example, a variable focus lens device disclosed in Japanese Unexamined Patent Publication No. 9-258271, a device for mechanically switching a plurality of hologram lenses having different focal lengths or Fresnel lenses, and the like are used. You can

Subject has VDT 5 built-in (or external)
According to the instruction from the speaker 13 of the above, when the imaged target pattern is viewed and it is determined that the desired condition is satisfied, any one of the microphone 6, the keyboard 7, the mouse 8, the joystick 9 and the like is used to set a predetermined timing. Reply with. In addition to these input devices, an input means having a function of detecting a motion of a body part such as a foot or a head that the subject can intentionally move may be used.

Distance sensors as distance measuring means 3 are attached to both sides of the variable focus means 1 and are connected to the response synchronization control means 2. The distance sensor 3 is V
Measure the distance from DT5 to the subject. Typical distance sensors that can be easily measured without imposing a burden on the subject include a radar Doppler type distance sensor, an ultrasonic wave transmitting / receiving sensor, and the like, but a commercially available one-dimensional distance measuring sensor can also be used.

The subject 14 carries an IC card for storing the personal information of the subject, and the base station 11 mounted on the response synchronization control means 2 wirelessly receives the personal information of the subject via the antenna 12. . The response synchronization control means 2 transmits the received personal information, the reception time, and the duration of the reception to the computer 4.

The computer 4 identifies the personal information of each individual, accumulates the personal data of each subject for a long time, and analyzes the characteristics of each personal data, even if a plurality of VDT workers work alternately. , It is possible to compare and determine work operation characteristics based on the characteristics. Therefore, the data of the degree of fatigue with respect to the intermittent operation time of each individual can be measured objectively and continuously for a long period of time without being influenced by the subjective data or arbitrary data of the subject. .

FIG. 2 is a block diagram showing a detailed configuration of the system shown in FIG. The response synchronization control means 2 controls the variable focus means drive circuit 21 that drives and controls the variable focus means 1 and the distance measuring means 2 that measures the distance from the screen of the VDT 5 to the subject's eyes or face or head. From the measuring means control circuit 22, the input device interface (I / F) circuit 23 for connecting the input means such as the microphone 6, the keyboard 7, the mouse 8, the joystick 9 through which the subject inputs a response, and the IC card 10. Receives personal information wirelessly, identifies and authenticates this personal information, and VDT
The base station 11 for measuring the sitting time of each worker, the synchronization of these circuits, the control of the signal from the CPU of the computer 4 and the synchronization of these circuits, and the signal from the input means by the input operation of the subject are provided. A synchronous control circuit 24 for detecting and identifying the image forming position and the image forming position moving speed of the variable focus means at that time.

The CPU of the computer 4 and the measurement software executed on the CPU display a predetermined optotype pattern on the screen of the VDT 5 in accordance with the content of the measurement and change it in the synchronization control circuit 24 of the response synchronization control means 2. The driving conditions of the focusing means 1 are designated. The synchronous control circuit 24 drives the variable focus means drive circuit 21 under a predetermined condition based on an instruction signal from the CPU of the computer 4, and
The distance measuring means control circuit 22 is driven at a predetermined timing, and the measurement result is sent to the CPU of the computer 4 as needed.

The subject operates the microphone 6, the keyboard 7, the mouse 8, the joystick 9, etc., when he / she sees the displayed index pattern and recognizes that it is in a predetermined state.
The synchronization control circuit 24 receives the subject's input signal via the input device I / F circuit 23, and the CPU of the computer 4
The interrupt signal and the information of the image forming position of the varifocal unit 1 and the moving speed of the image forming position at that time are transmitted. On the other hand, base station 1
1 wirelessly receives personal information from the IC card 10,
This personal information is identified and authenticated, the sitting time for each VDT worker is measured, and this information is sent to the computer 4 via the synchronization control circuit 24.

The inspection results can be stored in the computer 4, and the data can be transferred to a tabulation program, a drawing program, etc. to aggregate the data in a predetermined format.

The image of the target pattern seen by the VDT operator is
Since it is a visual target pattern in the VDT screen generated by software, the visual target pattern can be used as an inspection visual target without distinction between line drawing / planar drawing / solid, still image / moving picture, drawing / photograph, etc. it can.

By recording the inspection result in the storage device of the computer 4, reproduction or data processing can be performed at any time. Further, since the inspection can be performed automatically, the inspection can be performed even in a remote place connected via ISDN, a modem, etc., the data can be immediately aggregated, and the inspection result can be presented to the subject.

FIG. 3 shows an example of the positional relationship between the distance measuring means and the subject in the system of FIG. 1, here showing the positional relationship when the distance measuring means 3 is installed at both ends of the variable focus means 1. When the distance measuring means 3 such as a radar Doppler type distance sensor or an ultrasonic wave transmitting / receiving sensor is installed on both sides of the variable focus means 1, both sensors are synchronously transmitted, and their reflected signal response time and The position of the subject is calculated from the difference in reception time by the principle of triangulation. Strictly speaking, it is necessary to measure the distance to the subject's eyes,
When the eye cannot be captured accurately, it can be dealt with by measuring the distance to the face or head of the subject and converting it into the distance from the eye.

It should be noted that only receiving sensors are installed on both sides of the varifocal means 1, an electromagnetic wave or ultrasonic wave transmitter is placed around the subject's neck, and the absolute time from the point of transmission until reception by both sensors is completed. It is needless to say that the position of the subject can be calculated based on the principle of triangulation from the time difference between both sensors.

FIG. 4 is a flow chart showing an example of the inspection method by the VDT work motion measuring system of the present invention.

When a subject who possesses an IC card is seated in front of the present system that has been activated, personal identification authentication is automatically performed. However, if the subject has not been authenticated in advance or if he does not possess an IC card. , VDT work motion measurement system does not operate (s1, s2). Once the authentication is confirmed,
The subject is considered to have started work, and the work time is measured (s3).

Next, the programming unit (the CPU of the computer and the measurement software executed on the CPU) asks whether or not to inspect (s4). If the inspection is not performed, normal work is performed (s5). If you want to take an inspection during normal work, you can jump to the inspection item selection mode by inputting a specific icon or a specific key on the screen (s6, s7).

In the examination item selection mode, the examination is started after the type of the optotype, the display parameters, etc. are selected from the programming section (s8). The distance between the subject's face and the screen of the VDT is constantly measured so that the subject can be inspected even when the subject moves (s9). The optotype pattern is displayed on the VDT screen and can be displayed at any position on the screen. Further, the moving speed, direction, etc. of the target pattern can be arbitrarily set (s1
0).

Next, the varifocal drive circuit 21 drives V
The variable focus means 1 arranged on the front surface of the DT screen is controlled to arbitrarily control the image forming position of the target pattern displayed on the VDT screen and the speed of changing the focus (s11).

The subject discriminates the image formation of the optotype pattern, makes a judgment corresponding to the inspection item, and operates the microphone, in the case of the reaction by voice, and operates the keyboard, mouse, joystick, etc. in the case of the reaction of the body such as the hand and arm. (S1
2) and the image formation position of the optotype pattern from the face based on the signal of the input device, the moving speed of the optotype pattern, the response time from when the optotype pattern is viewed to when the optotype reacts to the input device. Is calculated (s13).

If the inspection is not completed (s14),
The processing of steps s9 to s13 is repeated, and if the inspection is completed, the result is stored in the program section of the computer 4 (s15).

If another inspection item is selected (s1
6) Repeat the processing of steps s4 to s15, and if there is no selection, only the data updated by the inspection this time is stored in the IC of the IC card 10 from the base station 11 among the above results (s17). The computer 4 stores and manages all history information, statistical processing information, evaluation data, etc. for each subject (s18).

[0045]

As described above, since the system of the present invention is configured as described above, (1) not only the visual acuity test for still images and moving images but also the measurement of reflex motor function, etc.
Dynamic inspections can be performed, and multiple inspections can be performed with one measurement system. (2) VDT operators can online their visual acuity and reflex movement functions at any time during actual VDT work postures and environments. (3) Furthermore, the personal information of each VDT worker is identified, the personal data of each subject is accumulated for a long time, the characteristics of the personal data are analyzed, and the work motion characteristics based on the characteristics are compared. Since it can be determined, the data of the degree of fatigue with respect to each individual's intermittent operation time can be measured objectively and continuously over a long period of time, without being influenced by the subject's subjective data or arbitrary data. Produce an effect.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an example of an embodiment of a VDT work motion measuring system of the present invention.

FIG. 2 is a block diagram showing a detailed configuration of the VDT work motion measurement system of FIG.

3 is a diagram showing an example of a positional relationship between a distance measuring unit and a subject in the system of FIG.

FIG. 4 is a flowchart showing an example of an inspection method by the VDT work motion measuring system of the present invention.

[Explanation of symbols]

1: Variable focus means, 2: Response synchronization control means, 3: Distance measuring means, 4: Computer, 5: VDT, 6: Microphone, 7: Keyboard, 8: Mouse, 9: Joystick, 10: IC card, 11: Base station of IC card receiving circuit, 12: antenna, 13: speaker, 14: subject, 21: variable focus means drive circuit, 22: distance measuring means control circuit, 23: input device interface (I /
F) Circuit, 24: Synchronous control circuit.

Continuation of front page (56) Reference JP-A-6-86756 (JP, A) JP-A-9-299332 (JP, A) JP-A-5-154105 (JP, A) JP-A-5-154103 (JP , A) Actual Kaihei 2-51503 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) A61B 3/00-3/16

Claims (9)

(57) [Claims] 1. A VDT (image display means), and a computer for generating and displaying a target pattern of a predetermined shape, size, and color on a screen of the VDT under desired conditions and processing measured data. Is arranged between a subject who operates the computer and the screen of the VDT, and the image formation position of the real image or the virtual image of the target pattern displayed on the screen of the VDT is calculated by the computer.
Variable focus means for varying according to the control based on the signal from the data input means for inputting the response of the subject, and the response signal of the subject from the input means for driving the variable focus means based on the signal from the computer Is detected, an interrupt signal is transmitted to the computer to stop or move the image forming position of the variable focus means,
And a response synchronization control means for identifying the image forming position or the image forming position moving speed of the variable focus means at that time and transmitting the identified image forming position or the image forming position moving speed to the computer. VDT work motion measurement system. 2. The VDT work motion measuring system according to claim 1, further comprising distance measuring means for measuring a distance between a subject and a screen of the VDT. 3. The distance measuring means installs a plurality of sensors for measuring the distance from the screen of the VDT to the eyes, face or head of the subject near the screen of the VDT,
The VDT work motion measuring system according to claim 2, wherein the VDT work motion measuring system is means for calculating a distance by using a principle of triangulation. 4. The response synchronization control means controls the distance measuring means, measures the distance from the screen of the VDT to the eye, face or head of the subject, and transmits the measured data to the computer. The VD according to claim 2 or 3, further comprising a measuring means control circuit.
T work motion measurement system. 5. Accumulating personal data for each subject for a long period of time,
5. The VDT work motion measuring system according to claim 1, further comprising means for analyzing a feature of the personal data and comparing / determining work motion characteristics based on the feature. 6. The VDT work motion measuring system according to claim 1, further comprising a voice guidance function for guiding a subject to an examination / operation procedure. 7. The VDT work motion measuring system according to claim 1, wherein the input means is any one of a keyboard, a joystick, a mouse and a microphone. 8. The VD according to claim 1, wherein the input means has a function of detecting a motion of a body part such as a foot or a head that the subject can intentionally move.
T work motion measurement system. 9. An IC card transmission / reception device that wirelessly receives the personal information from an IC card that stores the personal information of the subject, a unit that identifies and stores the received personal information and the time of reception, and is stored in a computer. 9. The VDT work motion measuring system according to claim 1, further comprising means for transmitting the subject data to the IC card and storing the data in the IC card.