JPS5897680A - Sensing light for human body - Google Patents

Abstract

PURPOSE:To make a device which turns on light by sensing a human body compact and low in cost in said deivce by using a mirror which condenses the IR rays from the human body and an irradiating mirror for the light. CONSTITUTION:A body case 1 is mounted by means of a mounting foot 2 to a wall or the like and when a human body approaches thereto, IR rays are made incident to a sensor 6 via a light filter 3 and a mirror 5 for condensing and irradiating of light. Then an electric bulb 7 is lighted and light is irradiated via the mirror 5. Thus the condensing of the IR rays and the irradiation of the irradiating rays are accomplished with one mirror, the sensing light for the human body is made into one unit which is compact and is low in cost.

Description

[Detailed Description of the Invention] Today, non-contact sensors such as pyroelectric sensors and ultrasonic sensors are used to detect the proximity of objects such as people and cars, and perform door service, security buzzers, sirens, etc. It is generally known to start.

The present invention aims to improve a human body sensing light in which a pyroelectric sensor is activated to turn on the light when a person approaches.

A pyroelectric sensor can obtain an electrical output in proportion to the incident infrared energy, but because it detects a human body from a relatively long distance, a condensing mirror is usually used in conjunction with the sensor.

Conventional human body sensing lights had a structure in which the part consisting of the condensing mirror and pyroelectric sensor and the irradiation light part were separated, but the present invention integrates this and uses the condensing mirror as the irradiation mirror, making it compact and compact. It provides a low-cost product. Embodiments will be described in detail below with reference to the drawings.

Figure 1 shows an embodiment of the present invention. In the figure, 1 is a main body case, 2 is a mounting arm, and 3 is an optical filter that serves as a dustproof filter and allows the wavelength range of infrared rays emitted by the human body to pass through. Polyethylene film, etc., which is easy to use, is used. 4 is a film holding ring, 5 is a condensing/irradiation mirror, and 6 is polyvinylidene fluoride.

A sensor incorporating a pyroelectric element such as lead titanate, 7 a light bulb for irradiation, 8 a switching and sequence circuit for the sensor and light bulb, 9 a dry battery, and 10 a main switch.

FIG. 2 shows a state in which infrared light # is focused on the pyroelectric sensor 6 via a condensing and irradiating mirror, and 11 indicates infrared light.

FIG. 3 shows a state in which the light from the light bulb 7 is irradiated via a condensing and irradiating mirror, and 12 indicates the irradiating light beam.As explained above, according to the present invention, infrared light is condensed and
Since the irradiation beam is irradiated through one mirror, the human body sensing light is integrated into one unit, making it easy to operate and has the advantage of reducing costs.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a diagram showing its infrared light condensing state, and FIG. 3 is a diagram showing its light irradiation state. 5... Concentrating and irradiating mirror, 6... Pyroelectric sensor, 7...
...Light bulb, 11...Infrared rays, 12...Irradiation light.

Claims (1)

[Claims] In a human body sensing light that lights up a light bulb by focusing infrared rays emitted from a human body on a condensing mirror and hitting a pyroelectric sensor to activate it, a light bulb is installed in front of the condensing mirror, A human body sensing light characterized in that the light is reflected and irradiated by the condensing mirror.