JPH03280398A - Illumination fixture - 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 Field of Industrial Application The present invention relates to a sink having the function of a reflex photoelectric sensor, which blinks in response to a reflected wave of an optical signal from an object, for example, an operator's hand. This relates to a lighting device for a former lantern.

Conventional technology Conventionally, this type of lighting equipment was installed in kitchen equipment, so it was often operated with wet or dirty hands, or while holding objects, resulting in hygiene issues and electric shock. From the viewpoint of preventing danger, the light source can be turned on and off without directly touching the operating section. For example, lighting devices such as sink lamps have been developed in recent years that operate using pyroelectric sensors that detect heat rays emitted from the human body.

Hereinafter, a conventional lighting device with a lighting function using a pyroelectric sensor will be described.

First, the configuration of the lighting device will be explained with reference to FIGS. 9 and 10. As shown in FIG. 9, the lighting device 1 is fixed to the lower surface of a hanging door 2 fixed to at least one wall surface, and serves as a light source that illuminates the cooking surface of a top plate 4 attached to a cabinet 3. There is. As shown in FIG. 10, inside the main body of this lighting device 1, there is a fluorescent lamp 6 serving as a light source, a lighting circuit 6 for the fluorescent lamp 5 consisting of a ballast, lighting tube, miscellaneous protection capacitor, etc. A detection unit 7, which includes a pyroelectric sensor that converts emitted heat rays into an electrical signal, an amplifier circuit that amplifies the electrical signal from the pyroelectric sensor to a certain level, etc., receives a detection signal from the detection unit 7. Power continues to be supplied to the lighting circuit 6 for a certain period of time from the time when the detection signal from the drive section 8 and the detection section 7, which are comprised of a relay etc. that continuously supply power to the lighting circuit 6, is turned OFF. An OFF timer part 9, etc., which outputs a signal to the drive unit 8, is provided. The timer portion 9 has a setting knob σ for allowing the user to arbitrarily set the output time of the continuation signal, and the setting knob 9' is structured to protrude from the bottom surface of the illumination main body 1. Similarly, a detection window 10 is provided on the lower surface of the illumination main body 1, through which the detection unit 7 receives heat rays emitted from the human body. Furthermore, the detection unit 7
The detection range extends downward from the bottom surface of the lighting body 1 and forward beyond the front edge 4' of the top plate 4, as shown by the hatched area 11 within the dotted line in FIGS. 9 and 11. It is an area that extends and spreads out radially.

Therefore, the operation of the lighting device 1 having the above configuration is such that when the user approaches the top plate 4 and enters the detection range 1o, the heat rays emitted by the user pass through the detection window 10 to the detection unit 7.
The detection section 7 senses the heat displacement and operates the drive section 8 to supply power to the lighting circuit 6, thereby lighting the fluorescent lamp 6. Next, while the user is moving within the detection range 10, the detection unit 7 continues to output signals to the drive unit 8, so the fluorescent lamp 5 continues to be lit. will stop moving within the detection range 1o,
Alternatively, if the user moves away from the detection range 1o, the displacement of the heating wire disappears, so the detection unit 7 moves away from the drive unit 8.
At the same time as the output signal is stopped, the timer part 9 receives the stop signal and continues the driving part 8 for the time set by the setting knob assuming the time when the user leaves the detection range 10 in advance. Then, the fluorescent lamp 6 is continuously turned on for the set time.

Then, when the set time period ends, if the detection unit 7 has not detected any new heat displacement, the fluorescent lamp 6 is turned off at that point.

Problems to be Solved by the Invention However, in the lighting device 1 with a lighting function using such a pyroelectric sensor, it is difficult to define the limit distance of the detection range 11, and furthermore, if the user does not move within the detection range 11, fireflies will not occur. Since the light lamp 6 turns off after the time set by the timer part 9, considering the range of action of the user during cooking, it is easier to use if the detection range 11 is as wide as possible. The range 11 has to extend further forward from the front of the top plate 4, so if the user unconsciously approaches the top plate 4, the detection unit 7 will detect the user and turn on the fluorescent lamp 6. Malfunctions such as turning on the light even when you don't want it to happen are likely to occur. In addition, it often happens that the user leaves the detection range 11 during cooking work, but if the user wants to keep the fluorescent lamp 5 on at that time, the user himself/herself can leave the detection range 11. It is extremely troublesome to use the setting knob 9' to set the duration of lighting each time in anticipation of the time when you will be away from the lighting device.On the other hand, from the lighting device 1 side, a long timer function is required. It had become. In addition, there are 12 stoves and 1 faucet in the kitchen.
There is a problem in that there are many devices that emit heat such as 3, and the heat from these devices is detected by the detection section 7 as shown by the arrow in FIG. 9, causing malfunctions.

The present invention solves these problems by eliminating erroneous lighting due to ambiguity in the detection range and the troublesome operation of having the user set the lighting duration of the fluorescent lamp in advance. Furthermore, the purpose is to prevent inconveniences such as malfunctions caused by heat generating equipment in the kitchen.

Means for Solving the Problems In order to achieve the above object, the first means of the present invention is to provide a light projector that emits a pulse of an optical signal of a constant level at a constant cycle, and a light receiver that receives the Parnu reflected wave from the object, an amplification section that amplifies the signal from the light receiver, a noise removal section that removes the influence of external noise, etc., and the pulse transmission signal and the reflected wave. A waveform shaping section that synchronizes with the signal and extracts and shapes the reflected wave signal only when both are synchronized, and a latch that inverts the state of the output level each time it receives a continuous signal of a constant level from the waveform shaping section. and a drive section that turns on and off power supply to an illumination load such as a fluorescent lamp according to the output level signal from the latch section.

Further, the second means is provided in the load control means with a delay section that inverts the output state of the latch section only when the continuous signal from the waveform shaping section is continuously output for a certain period of time. It is something.

Further, the third means causes the delay section to receive the continuous signal for a predetermined period from the waveform shaping section, and for a certain period of time immediately after outputting the output state inversion signal to the latch section.
It has a masking function of not accepting a new signal even if it is newly inputted from the waveform shaping section.

Function The first means uses a reflective photoelectric sensor consisting of a light emitter that transmits an optical signal and a light receiver that receives the reflected wave.
The pulsed optical signal transmitted from the optical receiver and the reflected wave signal received by the receiver are synchronized, and if they are synchronized, the signal will eventually be normal within the input period of the reflected wave signal. Since the detection signal is input to the latch section, the latch section can operate the fluorescent lamp to blink in response to this. Therefore, when performing a blinking operation, the prescribed blinking operation can be performed simply by placing your hand in front of the floodlight in such a way as to block the passage of the optical signal, so that no one is within the detection range. The light will remain on or off even when the light is on. Therefore, in order to prevent the user from unconsciously leaving the detection range and causing the fluorescent light to turn off, we assume that the user will be away from the detection range during cooking. There is no need for troublesome operations such as adjusting and setting the lighting duration of the fluorescent light.

Moreover, since there is no need to set a wide detection range, the detection range can be set within a range that will not cause a malfunction even if the user unconsciously approaches the top plate. In addition, the reflective photoelectric sensor detects and detects the near-infrared rays it emits and returns as reflected waves, which can prevent malfunctions caused by heat rays emitted from stoves and faucets in the kitchen. .

In the second means, a delay section is provided that determines that the pulse reflected wave signal is a regular ON signal only after it continues for a certain period of time, and operates the latch section to turn on or turn off the fluorescent lamp. , false detection does not occur with respect to a transient operation in which the user unconsciously crosses the detection range of the reflective photoelectric sensor during cooking work.

Furthermore, in the third means, the reflected wave signal continues for a predetermined period, and a mask function is provided that does not accept a new reflected wave signal even if it is input for a certain period of time immediately after operating the latch section. By providing the delay section, fluctuations in the level of the reflected wave signal due to uncertain operation near the limit reaching point of the optical signal from the light projector, that is, near the end of the detection range area of the reflective photoelectric sensor, can be prevented. This improves the reliability of non-contact switches, which tend to be unstable, by preventing chattering phenomena such as
Operability can be improved.

Embodiment Hereinafter, the structure of a lighting device according to an embodiment of the present invention will be explained with reference to FIGS. 1 to 4. First, as shown in FIG.
6. As a piece of equipment in a kitchen system consisting of a hanging door 17, a stove 18, a water faucet 19, etc., which are fixed to the wall on this top plate 16, the system is fixed to the bottom surface of at least one hanging door 17. It serves as a light source that illuminates the area around the cooking surface of the top plate 16. As shown in FIGS. 2 and 3, inside this lighting body 14, a lighting circuit 21 for the fluorescent lamp 20 consisting of a fluorescent lamp 20 serving as a light source, a ballast, a lighting tube, a miscellaneous protection capacitor, etc. , infrared light emitting diode 2
A sensor case 26 that integrally houses a reflective photosensor in which a light projector 23 consisting of a light emitter 23 consisting of a photodiode 24, etc. and a light receiver 26 consisting of a photodiode 24 etc. are arranged in parallel, and a reflected wave signal from the light receiver 26 are received to supply power to the lighting circuit 21. ON-OFF
A load control circuit group 27 and the like to be controlled are arranged, and the sensor case 26 is fixed from the back side in close contact with the front part 14' of the lighting device main body 14, and the sensor case 26 is fixed from the back side to the front part 14' of the lighting device 14.
The adhesion part is made of a transparent acrylic plate with a rectangular hole and a size that completely covers the bud part to prevent the intrusion of lumps and the like and to fully satisfy the detection performance of the reflective photosensor. is attached to the front part 14' of the illumination device 14, and a sensor detection window 28 is formed, and as shown in FIG.
The phototransistors 24 inside each have their light emitting and receiving surfaces facing the sensor detection window 28 side. In addition, the load control circuit group 27
As shown in FIG. 1, is a pulsed optical signal S from the infrared light emitting diode 22 which is emitted by an oscillator 29 at a fixed level and at a constant period. receives the reflected wave S1 reflected by an object such as a hand, and the photodiode 24 in the light receiver 26 receives the reflected wave S1 reflected by an object such as a hand.
The amplifying section 30 that amplifies the electrical signal ES1 outputted from the ES1 to a sufficient level is used as the @ stage, the sensitivity adjusting section 31 that determines the detection range of the reflective photoelectric sensor, and the noise removing section that consists of a bandpass filter. 32, D7〃, a waveform shaping section 33 consisting of a tube-flop circuit, a latch section 34 consisting of an RS flip-flop circuit, etc., and a driving section 36 consisting of a relay RL, etc., and the output of the driving section 35 is connected to the fluorescent lamp 20. The configuration is such that an AC power source 36 is connected to the lighting circuit 21 for blinking. Here, the bandpass filter removes the high-frequency external noise component superimposed on the electrical signal ES1, and filters only the regular low-frequency pulse component (in this case, there is a repeated pulse wave of 0.1 m5 ON and 30 m5 OFF). The D flip-flop is a narrow band filter that can pass through the signal, and the D flip-flop amplifies the transmitted pulse signal ESo from the emitter 23 and the electric signal ES1 resulting from the reflected wave from the light receiver 260, and removes noise from the normal reflected pulse signal ES1/ When both the pulse timing and pulse width are synchronized, the pulse-like signal ES1
/ is shaped into a constant level signal ES2 that continues during its pulse period, and the RS flip-flop changes its output level ES to a constant level signal ES2 in response to the constant level continuous signal ES2 changing from a high level to a low level.・I L
≧1 Bell Rumor + H Low Level A It shall be possible to hold each other with exertion 1-.

The blinking operation of the lighting device 14 having the above configuration will be explained with reference to FIGS. 1, 6, and 6. Floodlight 2
Since the infrared light emitting diode 22 of No. 3 emits a pulsed optical signal S0 of a constant level and a constant period, the object to be detected, in this case the user's hand 37, adjusts the sensitivity so as to block this optical signal S0. If it falls within the detection range 38 shown in FIG. 6, which is determined by adjusting the volume VR in the unit 31, the pulsed optical signal S is detected. is reflected by the hand 37, and a pulsed reflected wave S1 having the same period as the pulsed optical signal S0 enters the transistor 24 in the light receiver 26.

Therefore, the pulse reflected wave signal ES1 which is the output of the light receiver 26
As a result, an electrical signal synchronized in both synchronization and pulse width with the pulsed optical signal S0, that is, the cathode voltage signal ESo of the infrared light emitting diode 22 in the projector 23 is obtained. The D flip-flop circuit 33 constituting the waveform shaping section 33 receives an infrared light emitting diode 22 cathode voltage signal ES.

, an amplification section 30, a sensitivity adjustment section 31, and a noise removal section 3
2, a pure pulse reflected wave signal ES1' from which external noise has been removed is input, and here the reflected wave signal ES
If the pulse period and pulse width of 1/ are the same as the pulse period and pulse width of the original infrared light emitting diode 22 cathode voltage signal ES0, while this synchronization continues, that is, the input of the reflected wave signal ES1' ends, Until the next bulk of the infrared light emitting diode 22 cathode voltage signal ES0 is input, the output of the waveform shaping section 33 is at a high level when the reflected wave signal ES, / is present, and a low level when it is absent. A signal ES2 is obtained. The RS flip-flop circuit constituting the latch section 34 turns on the relay RL in the drive section 36 in response to the level signal ES2 changing from low level to high level.
The latch output signal ES3, which becomes the OFF signal, is sent to the drive unit 36.
The lighting circuit 21 outputs the latch output signal ES3 to
level, that is, while the relay RL is ON, the AC
Since it is connected to the power source 36, the light emitting lamp 2o will alternately turn off and turn on every time the pulse reflected wave S is input, and will emit light depending on the presence or absence of the pulse reflected wave S1. You can control the light 2o to blink. Therefore, as shown in FIG. 6, the sensitivity adjustment section 31 adjusts the detection range 38 for the hand 37 to
However, there is no support at all for normal operation with the hand 37, and even if the user unconsciously approaches the top plate 16, the light emitting lamp 2o will not enter the detection range 38. There will be no malfunctions such as blinking. Furthermore, the blinking operation in this case is different from that in the conventional example because the lighting state and the lighting state are repeatedly maintained each time the user consciously brings the hand 37 within the detection range 38. The user should prepare in advance for the possibility of leaving the kitchen unexpectedly for a moment while cooking.
There is no need for troublesome operations such as setting a timer to maintain the lighting state while you are away. Of course, since a reflective photoelectric sensor is used, there is no need to consider malfunctions caused by the sensor.

Note that the sensitivity adjustment section 31 has been described as having a configuration in which it can be varied with the volume, but this means that once the detection range 38 is determined in advance at one appropriate range within the range explained above,
Since there is no problem even if the rest cannot be changed, it goes without saying that it can be replaced with a single fixed resistor with a value that realizes the detection range.

Further, although the lighting circuit 21 is described as a glow or electronic starter system using a ballast, it goes without saying that an inverter lighting circuit can also have the same effect.

Next, other embodiments of the present invention will be described below with reference to FIGS. 1, 7, and 8.

Waveform shaping section 33 in load control circuit group 27 in FIG.
A delay section $ consisting of the two monostipples and multivibrators (front section 39', ridge section 39''), etc. shown in FIG. ES2 is input to the rising trigger input 11 of the front stage section 39'.Furthermore, the output 01 of the front stage section 39' becomes the input of the falling trigger input 12 of the rear stage section 39#. The output o2 forms a latch output signal ES3 to the latch unit 34, and is configured to feed back to its own reset power R2 via a diode D. Also, a falling trigger input to the marking section 39'! , and the reset human power R1 are connected and fixed to a high level, and the rear stage section 39''o start-up trigger input I2 is connected and fixed to a low level.

In the above configuration, the output o1 of the front stage section 39' changes from the low level of the rising trigger input (-) to the high level (reflected wave input ES2) when the reset input R1 is in a high level state.
Outputs a high level pulse for T1 time from the rise to the level, outputs 02 of the rear stage section 38'', latch section 34 manual power =
ES" is a falling trigger signal when the reset input R2 is in a high level state. (Previous section 3 s'o1 output = ES2
') A high level pulse is output for 12 hours from the fall of the pulse to low level. Therefore, when there are 11 people in the front section 39', as shown in area I of Fig. 8, from the time when ES2 starts manpower, the rear section 39' is operated, and the input is T1.
Even if the level changes from no to low after time has passed, the rear section 39''R2 manual power is at low level (reset) ON.
The Q2 output does not change from the low level, and naturally the latch output ES3 does not go to the low level.

Next, when there is a pulse reflected wave ES2 at the input of the front part 39'I for time t1 (>T1), as shown in area n of FIG. 8, this time, contrary to the case of area 1, Rear section 39
``R2 human power continues to level, Tsuma Shiriset OF
Since it is in the F state, the second stage s gI'02 output (ES2'') changes from low level to no level for only 12 hours when the input (ES2') changes from high level to low level. Therefore, the latch part 34
If the previous state of the latch output ES3 is low, it will be latched to the no-low level from that point on. Furthermore, as shown in the area of FIG.
Since the latch output ES3 from the latch unit 34 changes from the low level to the low level at the time when the signal ES2') changes from the low level to the low level, the latch output ES3 from the latch section 34 is latched from the low level to the low level. At this time, the rear section 391O2
Even if the pulse reflected wave input ES2 for 12 hours (>71) enters the front stage section 39'11 again while the output is at T2 time, the 02 output is already at the NO level. As for the o2 output, from the time when the rear stage I2 manual power changes from high level to low level after T1 time has elapsed, the o2 level pulse is continuously output again for 72 hours, and the level of the latch output ES3 of the latch unit 34 remains unchanged. There is no change. Finally, in the case of this embodiment, if the incident time of the pulse reflected wave S1 is shorter than the delay time T1, there is no change in the state of the drive unit 36, and the incident time of the pulse reflected wave S1 is shorter than the delay time T1. The first time when the drive unit 3 is too long
6 changes its state after this T1 time has elapsed, and the wave resistance S
1 is incident, the signal is not received, so the fluorescent lamp 2o continues to maintain its blinking state. Therefore, it is possible that the user unintentionally crosses the detection range 38 shown in FIG. It is possible to prevent causes of malfunction of non-contact Nuwitch, such as chattering phenomenon. This time, T1=0.1 seconds and 72205 seconds, but T1. If both T2 are longer than this time,
Users find the delay in the blinking state frustrating, and conversely, if the delay is shorter than this, the effect of preventing transient unconscious operations and chattering will be diminished.

Effects of the Invention As is clear from the above embodiments, according to the present invention, a light emitter, a light receiver that receives a pulse reflected wave from an object of a pulsed optical signal from the light emitter, and a multi-reflection photoelectric sensor are provided. , the signal from the light receiver is finally transmitted to the fluorescent lamp in the illumination device every time it enters the lighting device by a load control means consisting of an amplifying section, a noise removing section, a waveform shaping section, a latch section, and a driving section. By converting it into a latch signal that causes the flashing operation to occur, the flashing operation of the fluorescent light can be performed simply by placing your hand in front of the floodlight. Since the detection range does not need to be as wide as in conventional systems, the user can anticipate in advance the possibility of malfunctions caused by unintentionally approaching kitchen equipment or unexpectedly leaving the kitchen for a moment during cooking. There is no need for troublesome operations such as setting a timer to keep the lights on while you are away.

Furthermore, since the signal is near-infrared rays, it is possible to prevent malfunctions caused by heat from the stove or water faucet that is constantly generated in the kitchen equipment.

In addition, only after the pulse reflected wave signal continues for a certain period of time, it is determined that it is a regular ON signal, and the fluorescent lamp blinks, and a latch signal is output to the drive unit that operates the fluorescent lamp. By providing a delay section between the waveform shaping section and the latch section, which has a masking function that does not accept the next pulse reflected wave signal even if it is newly input for a certain period immediately after that, It can effectively prevent transient malfunctions during operation and malfunctions due to input signal chatter, and improve the reliability of non-contact type switches, which generally tend to be unstable.
It also has the practical effect of improving operability.

[Brief explanation of drawings]

Fig. 1 is a block diagram of a lighting device according to an embodiment of the present invention, Fig. 2 is an external perspective view of the lighting device, Fig. 3 is an enlarged view of the vicinity of the sensor detection part of the lighting device, and Fig. 4 is the same device. 6 is a sectional view taken along line BB' in FIG. 4, FIG. 6 is a diagram of main signal waveforms in FIG. 1, and FIG. 7 is a diagram of other embodiments of the present invention. A block diagram of the delay section, FIG. 8 is a signal waveform diagram of the main part in FIG. 7, FIG. 9 is a front view of a kitchen equipment in which a conventional lighting device is installed, and FIG. 10 is a perspective view of the appearance of the lighting device. Figure 11 is A-A'14 in Figure 9.
......Illumination device, 2o...Fluorescent lamp, 21
......Lighting circuit, 22...Infrared light emitting diode, 23...Light emitter, 2,4...
Phototransistor, 26... Light receiver, 27...
...Load control circuit group, 3o...Amplification section, 3
2... Noise removal section, 33... Waveform shaping section, 34... Latch section, 36... Drive section, 39... Delay section, 39'... front stage section (delay time setting), 39' side... ridge section (mask time setting).

Claims (3)

[Claims] (1) Equipped with a light emitter made of a photodiode or the like that emits pulses of a certain level of optical signal in a certain synchronization, and a light receiver made of a phototransistor or the like that receives the reflected wave from an object of the light signal emitted from the light emitter, An amplification section that amplifies the signal from the light receiver, a noise removal section that removes the influence of external noise superimposed on the reflected wave signal, and a synchronization between the pulse transmission signal from the projector and the reflected wave signal. a waveform shaping section that extracts and shapes the reflected wave signal only when both are synchronized; a latch section that inverts the state of the output level each time it receives a continuous signal of a constant level from the waveform shaping section; and the latch. The power supply to lighting loads such as fluorescent lamps is turned on and off based on the output level signal from the unit.
A lighting device having a load control means consisting of a drive section that performs F. (2) A delay section is provided in the load control means for outputting a signal that inverts the output state of the latch section only when the continuous signal from the waveform shaping section is continuously output for a certain period of time. The lighting device according to claim 1, characterized in that: (3) The delay section receives the continuous signal for a predetermined period from the waveform shaping section and receives a new signal from the waveform shaping section for a certain period of time immediately after outputting the output state inversion signal to the latch section. 3. The illumination device according to claim 2, further comprising a masking function of not accepting the signal even if the signal is received.