JPS63217500A - Biologic status detector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a biological condition detection device, such as a dozing detector, which detects the condition of a biological body by detecting the opening and closing of the eyelids.

(b) Conventional technology A biological condition detection device that detects the biological condition by opening and closing the eyelids;
For example, as a dozing detector, the one described below is known.

This conventional dozing detector uses a reflective photoelectric switch consisting of a light emitting element and a light receiving element as a sensor. This sensor is attached to an eyeglass frame, projects light from a light emitting element to the eye, and receives the reflected light with a light receiving element.

When the eyelids are open and closed, the reflection point, ie, the distance from the light emitting element, is different, resulting in a difference in the amount of light received. This difference is level-discriminated, the opening and closing of the eyelids is detected, and the occurrence of dozing is detected from, for example, the time when the eyelids are closed, and a buzzer or the like is sounded to notify the occurrence of dozing.

(c) Problems to be solved by the invention In the conventional dozing detector described above, only the detection of dozing is notified, or the notification and the current number of blinks per minute are only digitally displayed. there were. For this reason, detection parameters (e.g. eyelid closure time)
There is a problem in that it is not possible to grasp changes in the opening/closing state when adjusting the body condition or when wanting to know changes over time in the biological state.

The present invention has been made in view of the above-mentioned disadvantages, and an object of the present invention is to provide a biological condition detection device that can easily detect changes in the open/closed state.

(d) Means and operation for solving the problems As a means for solving the above-mentioned disadvantages, the biological condition detection device of the present invention includes a detector for detecting information on opening and closing of eyelids, which includes a transmitting element and a receiving element. , an opening/closing/closing information processing means for processing the opening/closing/closing information detected by the detector, and a display means for displaying the processing results of the opening/closing information processing means in graphic ink. .

Therefore, it is possible to easily know the temporal change in the opening/closing state, and it is easy to grasp the change in the biological condition and adjust the detection parameters.

(E) Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

In this embodiment, the present invention is applied to a drowsiness detector for preventing drowsy driving, etc., and as shown in FIG.
The detector 2 is attached to a glasses frame F, and the rest is housed in a main body case 6.

The detector 2 is a reflective photoelectric switch in this embodiment, and includes a light emitting diode (LED: emitting element) 3 and a phototransistor (receiving element) 4 (see FIG. 2).

The LED 3 irradiates the right eye of the person wearing the glasses frame F with infrared rays. This light is reflected by the eyeball when the eyes are open, and reflected by the eyelids when the eyes are closed, and reaches the phototransistor 4. The output of the phototransistor 4 becomes larger when the eyes are closed. This is because reflection occurs closer to the phototransistor 4 when the eyes are closed.

This detector 2 is connected to the main body case 6 via a lead 15. On the top of the main body case 6, there is a liquid crystal display (LC).
D: display means) 7 and a power switch 8 are provided.

Inside the main body case 6, there are a driver circuit 9 for driving the LED 3, an amplifier 10 for amplifying the output of the phototransistor 4, a processing circuit 11 for processing the output signal of the phototransistor 4 amplified by the amplifier 10, and a buzzer 12.
is provided.

The processing circuit 11 includes a CPU, a memory, etc., and discriminates the level of the output signal from the amplifier 10 to detect dozing. In this embodiment, when the eyelid closing time (blink time) is longer than a predetermined time, it is assumed that dozing is detected, and the buzzer 12 is sounded.

Of course, dozing may be detected based on other detection parameters such as blink frequency, which can be changed as appropriate.

Furthermore, the processing circuit 11 counts the number of blinks per minute with a blink time of 0.3 seconds or more.

Then, the temporal change is displayed as a bar graph in graph ink on the LCD 7 (see FIG. 3).

This display shows the number of times on the vertical axis and the time on the horizontal axis. In the state shown in FIG. 3, the number of repetitions is gradually increasing, which indicates that the subject's fatigue is gradually accumulating. Furthermore, it is also possible to adjust the blink time for detecting dozing off based on this display.

In addition, as the opening/closing information to be displayed, time changes such as blink time, blink interval, and number of blinks per minute can be selected. Further, two or more pieces of opening/closing information can be displayed simultaneously or by switching, and the design can be changed as appropriate.

Further, the detector is not limited to a reflective photoelectric switch, and a reflective ultrasonic switch or the like can also be used.

(f) As described in detail of the invention, since the biological condition detection device of the present invention displays the processing results of the opening/closing information in graphic ink, it is possible to easily grasp temporal changes in the biological condition. This has the advantage that the dozing detection parameters can be easily adjusted.

[Brief explanation of the drawing]

Each of the drawings shows an embodiment of the present invention, and FIG.
FIG. 2 is an external perspective view of a dozing detector according to an embodiment of the present invention, and FIG. 2 is a block diagram showing a circuit configuration of a dozing detector.
FIG. 3 is a diagram showing an example of a display on the liquid crystal display of the co-sleeping detector. 2: Detector, 3: LED. 4: Phototransistor, 7: Liquid crystal display, 11: Processing circuit. Patent applicant Tateishi Electric Co., Ltd. Agent
Patent Attorney Shigeru Nakamura Figure 1

Claims (3)

[Claims] (1) A detector comprising a transmitting element and a receiving element and detecting eyelid opening/closing information, an eyelid opening/closing information processing means for processing the detected eyelid opening/closing information, and a graphic representation of the processing results of the eyelid opening/closing information processing means. A biological condition detection device comprising: a display means for displaying a display. (2) The eyelid opening/closing information processing means calculates the number of blinks per unit time when the eyes are closed for a predetermined time or more, and the display means graphically displays this time change. The biological condition detection device according to item 1. (3) The biological state according to claim 1 or 2, wherein the eyelid opening/closing information processing means performs dozing detection processing based on the eyelid opening/closing information, and sounds an attached alarm when dozing is detected. Detection device.