JPH06241788A - Static human-sensitive device and human-sensitive lighting system - Google Patents

Abstract

PURPOSE:To provide a static human-sensitive device capable of detecting the distance to a human body in two stages of the first zone (far) and the second zone (near) and a human-sensitive lighting system capable of automatically switching the illumination in two stages of high and low based on the detected result at a low cost. CONSTITUTION:Infrared rays are emitted from the light source 1 of one light emitting diode and fed to a human body, the reflected light is received by the first light reception section 2 and the second light reception section 3 of two photo-diodes arranged at a distance, it is photoelectrically converted and amplified, and the obtained light reception voltage is compared with the threshold value voltage set to a value different for each light reception section. If the light reception voltage is larger than the threshold value voltage, the output voltage Vout1, Vout2 are outputted to the output circuit, and the existence of the human body and the far/near state from the light reception sections are detected. The output circuit, an off-delay function, and a self-holding function are incorporated in a lighting circuit, and the high/low-switching of illumination and the automatic turning-on/off are performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a static type human illuminating device and a human illuminating device in which the illumination is automatically switched between strong and weak or turned on and off.

[0002]

2. Description of the Related Art Conventionally, an energy-saving type automatic lighting / extinguishing light that is turned off when no people are present even at night and is turned on only when people are present or approaching and there is a real need for illumination. A device has been proposed.

For example, Japanese Patent Laid-Open No. 58-48324 has a visible light sensor for detecting ambient brightness and a so-called pyroelectric sensor for detecting far infrared rays emitted from the human body, and each sensor is provided. Is amplified by a preamplifier, and is constantly compared with a reference voltage by a comparison amplifier, and is configured to generate a comparison output when it falls below a predetermined value, and a visible light sensor side and a pyroelectric type are formed by a logic circuit (such as an AND circuit). There is disclosed an automatic lighting / extinguishing switch that produces an output when both comparators on the sensor side are producing a comparison output and conducts an output circuit such as a relay.

However, the pyroelectric sensor of the switch for the automatic light-on / off light described in the above-mentioned Japanese Patent Laid-Open No. 58-48324 is for detecting the change of far infrared rays, and the change of far infrared rays when a person is stationary. It is difficult to detect because there is almost no. Therefore, even if the light is turned on, it is turned off, and if the light is to be continued, it must be constantly operating. In addition, the pyroelectric sensor may malfunction due to the influence of the ambient temperature and is also not suitable for a flicker fluorescent lamp.

Further, it is impossible to distinguish the distance and the distance. For example, when a person approaches a position far away to a certain extent, the light is turned on darkly, and when the person is approached further closer, the light is turned on brightly. In addition, there is a problem that the brightness of the illumination cannot be switched.

On the other hand, Japanese Unexamined Patent Publication No. 63-206610 discloses a distance measuring device capable of determining the distance to an object. This distance measuring device projects a visible light beam from a light source at the center of the light projecting system through a projecting lens to a detected object, and the light reflected by the object is symmetrically arranged on both sides of the projecting system. A light receiving system consisting of a light receiving lens and a reflecting mirror collects and forms an image,
This is an optical displacement sensor that calculates a position detection signal obtained from a terminal of a position detection element (PSD) by a calculation unit (microcomputer) to obtain a distance to an object, and enables determination of the distance. Therefore, by using this distance measuring device, it is possible to switch the brightness of the illumination in several steps in accordance with the distance to the human body, and to control the quantity continuously and perform a fine operation.

[0007]

However, in the technique described in Japanese Patent Laid-Open No. 63-206610, the cost is high because the number of components is large, the number of components is large, and the structure is complicated. It is several times more than a sensor. Therefore, there is a problem in that it is difficult to use in terms of cost in a relatively simple application in which the brightness of the illumination is switched in two stages depending on the distance.

The present invention has been made in view of the problems of the prior art as described above, and solves the problems of the prior art, and a stationary human being capable of reliably and easily detecting the distance to the human body in two steps. It is an object of the present invention to provide a human-sensing device and a human-illuminating device that can be automatically adjusted to two levels of strength based on the detection result of the human-sensing device at a low price.

[0009]

In order to achieve the above-mentioned object, a static type human sensing device (hereinafter referred to as "human sensing device") of the present invention according to claim 1 comprises one light emitting diode (hereinafter referred to as "human sensing device"). (LED) will be emitted to project on the human body, and the reflected light will be received by the first and second light receiving portions arranged at a distance, and the threshold value of each light receiving portion will be different, The gist is to detect the presence of a human body and the distance between the human body and the light receiving unit.

According to a second aspect of the present invention, there is provided an output circuit of the stationary human type device according to the first aspect, wherein the output circuit is inserted into the illumination circuit, and the illumination circuit has an off-delay function and a self-delay function. When the human body enters the first zone, a weak illumination is lit and held, and a strong function is provided when the human body enters the second zone which is closer to the light receiving part in the first zone. Lighted and held, then strong lighting is kept on while the human body stays in the first zone, and when the human body moves out of the first zone, the lighting is kept on for a certain period of time and then turned off The summary is that it has become.

In the present invention, the first zone means
It is a relatively wide human zone, and it means the zone where the first action such as lighting should occur, and the second zone is
This is a human-sensing zone in the first zone, which is set relatively close to the light-receiving portion and is relatively narrow, and is a zone in which a second operation such as illumination should occur. The threshold value will be described in the following operation.

[0012]

FIG. 1 is an explanatory diagram of the light emitting and light receiving actions of the human detection device of the present invention, and FIG.

As shown in FIG. 1, the human-sensing apparatus includes a first light receiving device in which one light emitting diode light source 1 and two photodiodes (hereinafter referred to as "PD") are arranged at a distance. The unit 2 and the second light receiving unit 3 are included. When the light beam emitted from the light source 1 hits the human body, a part thereof is reflected and returned. The reflected light reflected and returned from the human body that has entered the position of M ₁ is received by the first light receiving unit 2 on the right side in FIG. 1. Further, a person approaches the human sensing device, and the reflected light reflected and returned from the human body that has entered the position of M ₂ is received by the second light receiving unit 3 on the left. In this case, since the first light receiving portion 2 and the second light receiving portion 3 are arranged at a distance from each other, the reflected light received by both light receiving portions does not cause interference.
The light used is most commonly infrared light in the wavelength range of 870 nm to 1100 nm.

The reflected light received by the first light receiving portion 2 and the second light receiving portion 3 is converted into a current according to the amount of received light by the "photo-electric conversion" action of the PD. This current is amplified by a preamplifier or the like, and the current or voltage (in the present invention, the voltage is referred to as “photoreception voltage”) is compared with a reference voltage set as a reference, that is, a “threshold voltage”, and the light reception voltage is compared. Is less than the threshold voltage, no output voltage is output to the output circuit, and when the received light voltage exceeds the threshold voltage, a constant output voltage is output to the output circuit.

The threshold value (current or voltage) is
Depending on the distance to be detected, ambient conditions such as external light and temperature, it is possible to adjust the first and second light receiving units separately by using variable resistors or the like.

The above-mentioned amount of received light is theoretically inversely proportional to the square of the distance between the light source and the human body. Therefore, as shown in FIG. 2, the threshold voltage of the first light receiving portion is set to a low value V ₁ ,
The threshold voltage of the second light receiving portion is set to a value V ₂ higher than that, and as shown in FIG. 1, a person enters a position M ₁ that is a certain distance away from the human presence device, and the first light receiving portion receives light. At time t ₁₁ when the light receiving voltage v ₁ of the portion 2 exceeds the threshold voltage V ₁ , a constant output voltage v _out1 is output to the output circuit of the first light receiving portion 2 and it is detected that the vehicle is in the first zone. . Then, if a person moves away without reaching the position of M ₂ , the light receiving voltage of the first light receiving unit 2
v ₁ becomes the threshold voltage V ₁ or less again at the time of t ₁₂ ,
The output voltage becomes 0, and the detection signal in the first zone disappears.

On the other hand, at time t ₂₁ when the person reaches the position of M ₂ which is closer to the position of M ₁ , the light receiving voltage v ₂ of the second light receiving unit 3 exceeds the threshold voltage V ₂ , so that the second light receiving is performed. The output voltage v _out2 is output to the output circuit of the unit 3, and it is detected that the vehicle is in the second zone.

Then, when a person retreats to a position between M ₂ and M ₁ ,
The light receiving voltage v ₂ of the second light receiving portion 3 becomes equal to or lower than the threshold voltage V ₂ at the time point of t ₂₂ , so that the output voltage of the second light receiving portion 3 becomes zero. The output voltage v is output only to the output circuit of the first light receiving unit 2.
_Out1 is output and it is detected that the vehicle is in the first zone.

Next, in the human illuminating device of the present invention, the output circuit of the human illuminating device is inserted in the illuminating circuit, and
The lighting circuit incorporates an off-delay function and a self-holding function. Then, when the human body enters the first zone, the weak illumination is turned on and held, and when the human body enters the second zone closer to the light receiving section in the first zone, the strong illumination is turned on and held, and then the human body is turned on. The illumination of the strong illumination is maintained while it remains in one zone, and when the human body moves out of the first zone, the illumination is kept on for a certain period of time and then turned off.

Therefore, by installing the motion sensing device in the vicinity of the lighting fixture, when a person approaches the lighting fixture for a certain distance, the weak illumination (darker illumination) is turned on to illuminate the hands and feet, and When you approach the luminaire for a certain distance or place your hand over it, the strong illumination (brighter illumination) lights up, allowing you to read or do detailed work. Further, since the light is turned off when a person moves away from the lighting equipment, wasteful power consumption is saved.

The output voltage v _out2 of the second light receiving portion of FIG.
Becomes 0 at the time of t ₂₂ , but as described above, since the human illuminating device incorporates the off-delay function and the self-holding function, when a person moves out of the first zone, both the strong and weak lighting are constant. It remains on for a period of time and then goes out. (See Examples)

[0022]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 3 is an explanatory view showing the configuration and operation of the sensor unit of the embodiment of the present human presence device using infrared rays, FIG. 4 is a block diagram of the circuit unit of the same human presence device, and FIG. 5 is the present human presence illumination. It is a circuit diagram of an apparatus example.

As shown in FIG. 3, the sensor unit S of the human detection device includes one light source 1, two light receiving units, a first light receiving unit 2 and a second light receiving unit 3 which are arranged at a distance. It is installed with the direction of people approaching.

Further, the sensor section S is connected to a circuit section C having a structure as shown in the block diagram of FIG.

Now, description will be given of a case where a person M enters within 1 m (first zone) from the sensor section S of the human detection apparatus shown in FIG. 3 and holds the hand H at a position of 10 cm (second zone).

In FIG. 4, a variable resistor (not shown) is adjusted to set the threshold voltage V ₁ of the first light receiving portion to a value corresponding to a distance of ₁ m, and the threshold voltage V ₂ of the second light receiving portion is set. 10 cm
Set to a value corresponding to the distance.

When the human body approaches the distance of 1 m from the light source 1, the infrared rays emitted from the LED of the light source 1 are reflected by the human body by the oscillator 4, the timing generation circuit 5, and the light emitting circuit 6, and the first light receiving portion 2 The light is received by the PD. The received infrared rays are converted into a current, amplified by the preamplifier 21 to become the received light voltage v ₁ , and compared with the preset threshold voltage V ₁ of the first light receiving portion 2 by the comparator 22 and v ₁ > V ₁
Is confirmed, the signal processing circuit 23 is turned on in synchronization with the timing generation circuit 5, and the output voltage v _out1 is output from the output circuit 24. By detecting the output voltage v _out1 with a detecting means such as a voltmeter, it can be detected that the human body is in the first zone.

When the human body further approaches and holds his / her hand at a position of 10 cm, the reflected infrared rays are received by the second light receiving portion 3 and converted into an electric current, and the light receiving voltage v amplified by the preamplifier 31.
₂ is a preset threshold voltage V ₂ of the second light receiving portion 3.
Is compared with the comparator 32, and v ₂ > V ₂ is confirmed,
Similarly, the output voltage v _out2 is output from the output circuit 34,
By detecting this with a detecting means such as a voltmeter, it is detected that the hand is in the second zone.

The detected result can be displayed by guiding the output voltage to a measuring instrument, a lighting device, a heating element, an acoustic device, etc. and operating them.

By inserting the output voltage into an operation circuit of a lighting device, a heating element, an audio device, a power device, etc., these devices and equipment can be operated in two stages depending on the position of the human body. You can

Next, the structure and operation of the embodiment of the human illuminating device connected to the above human detecting device will be described in accordance with the operation sequence based on FIG.

When the first light receiving section detects a person 1 m from the light source and an output voltage is output from the output circuit of the first light receiving section, the coil 71 of the relay 7 is excited and the contact 72 (normally open) is opened. The 15W fluorescent lamp 10 is closed and kept on. Further, the contact 73 (normally closed) is opened at the same time when the contact 72 is closed, the current of the self-holding coil 83 is cut off, and the self-holding state is released.

Then, when the second light receiving section detects a hand held 10 cm from the light source and an output voltage is output from the output circuit of the second light receiving section, the self-holding coil 81 of the keep relay 8
Is excited and the contact 82 (normally open) is closed, 60W
The fluorescent lamp 11 lights up. Once the keep relay 8 is turned on, it is held by itself until there is no output from the first light receiving section,
The 60W fluorescent lamp 11 keeps on. Therefore, it is not necessary to continue holding the hand even after the 60W fluorescent lamp is turned on.

When a person moves away from the light source by more than 1 m and the output from the output circuit of the first light receiving unit disappears, the contact 72 opens, the terminal 73 closes, and a current flows through the self-hold release coil of the relay 8 The holding is released and the 60 W fluorescent lamp 11 is turned off. Further, the off-delay timer 9 operates at the same time when the contact 72 is opened, and the 15W fluorescent lamp 10 continues to light for a certain period of time, but goes off at the same time as the off-delay timer 9 stops.

Although FIG. 5 shows an example of a circuit of an illuminating device using a keep relay, an illuminating device having a function equivalent to this may be incorporated in a microcomputer.

[0036]

As is apparent from the above description, the static type human presence device of the present invention is provided with one light emitting unit, two light emitting units, without using a light emitting unit, a light receiving unit, a computing unit and the like having a complicated structure. It is an inexpensive device that uses only one light-receiving part and a simple light-receiving part circuit, thereby accurately and easily detecting the distance to the human body in two steps, and operating the device based on the detection result. Can be done.

Further, the human illuminating device of the present invention has a simple and inexpensive structure in which the off-delay function and the self-holding function are incorporated in the above-mentioned stationary human illuminating device, whereby the illumination is automatically performed. It can be switched between two levels of strength and weakness, or can be turned on and off.

[Brief description of drawings]

FIG. 1 is an operation explanatory view of a light emitting unit and a light receiving unit of a static human detection device of the present invention.

FIG. 2 is an explanatory diagram showing a relationship among a threshold value, a received light amount, and an output.

FIG. 3 is an explanatory diagram of a configuration and operation of a sensor unit of the human detection device embodiment.

FIG. 4 is a block diagram of a circuit unit of the human detection device embodiment.

FIG. 5 is a circuit diagram of an illumination circuit of a human-illumination device embodiment.

[Explanation of symbols]

1 Light emitting part 2, 3 Light receiving part 21, 31 Preamplifier 22, 32 Comparator 24, 34 Output circuit 8 Key relay 9 Off-delay timer V ₁ , V ₂ Threshold voltage

Claims (2)

[Claims] 1. A light-emitting diode that emits light to project it onto a human body, and the reflected light is received by first and second light-receiving portions arranged at a distance, and the threshold value of each light-receiving portion. A static human detection device characterized by detecting the presence of a human body and the distance from the light receiving portion of the human body. 2. The stationary human sensing device according to claim 1, wherein the output circuit is inserted into a lighting circuit, and an off-delay function and a self-holding function are incorporated in the lighting circuit so that the human body is within the first zone. When the human body enters the second zone which is closer to the light receiving part in the first zone, the strong illumination is lit and held, and then the human body is kept in the first zone. The human-illumination device is characterized in that the strong illumination is kept on while it stays, and when the human body moves out of the first zone, the illumination is kept on for a certain period of time and then turned off.