JP2005285653A - Non-contact switch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a non-contact switch allowing a person to perform switch operation by bringing his/her hand close to a switch box and perform switch operation even from a remote place. <P>SOLUTION: This non-contact switch has switch means 12 provided in the switch box 18 and connected with electrical equipment 11 in series, a reflection type optical sensor 15 provided in the switch box 18 and provided with a light receiving part 14 and a light projecting part 13, a signal receiving part provided in the switch box 18 and receiving signal inputting from a remote controller 19 provided separately, a signal processing means 16 for turning on and off the switch means 12 by receiving a signal from either of the light receiving part and the signal receiving part, and a power supply part 17 for supplying power supply to them. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a non-contact switch that performs on / off of an electric device such as a general lighting or a ventilation fan in a non-contact manner without physically operating the switch.

Many non-contact switches using optical sensors, ultrasonic sensors, and the like have been proposed, and it is generally performed to turn on / off electrical devices using these switches. As such a switch, there is Patent Document 1 previously filed and published by the applicant of the present application. This is attached to a wall or a pillar, and a light receiving unit and a light projecting unit are provided on the surface side of the switch box. The reflection type optical sensor is provided, the human body is detected by the optical sensor, and the switch means connected in series to the electric device is turned on and off.

JP 2004-056905 A

However, in the non-contact switch device described in Patent Document 1, it is necessary to make sure that a person approaches and puts his hand in front of the non-contact switch to perform an on / off operation of the switch. Of course, if the detection distance of the optical sensor is increased, it is possible to operate from a place at a certain distance, but this causes a problem that the switch is turned on only by passing a person.
The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a non-contact switch that allows a person to move a hand or the like close to a switch box and perform a switch operation from a remote place. It is said.

The non-contact switch according to claim 1, wherein the non-contact switch according to claim 1 includes a switch box, and is a non-contact switch that is attached to a building and is turned on and off in series.
Switch means provided in the switch box and connected in series to the electrical device;
A reflective optical sensor in which a light receiving unit and a light projecting unit are provided in the switch box;
A signal receiving unit that is provided in the switch box and receives a signal input from a remote controller provided separately;
A signal processing unit that receives a signal from one of the light receiving unit and the signal receiving unit and turns the switch unit on and off;
A power supply unit configured to supply power to the reflective optical sensor, the signal receiving unit, and the signal processing unit;
Here, the signal medium from the remote controller may be any of light, radio waves, and ultrasonic waves, and the signal receiving section includes a light receiving section, an antenna, and an ultrasonic receiver depending on the signal medium of the remote control.

The non-contact switch according to claim 2 is the non-contact switch according to claim 1, wherein the remote controller is provided with a light-emitting unit that emits an optical signal, and the signal receiving unit and the light-receiving unit of the reflective optical sensor. Furthermore, the optical signal of the light projecting unit of the reflection type optical sensor and the optical signal emitted from the light emitting unit of the remote controller are different signals, and the signal received through the light receiving unit is subjected to the signal processing. The switch means is turned on and off by identifying the means.
As a result, the number of light receiving units can be reduced, and further, the signal from the light projecting unit of the reflective photosensor and the signal from the light emitting unit of the remote control can be distinguished.

The non-contact switch according to claim 3 is the non-contact switch according to claim 1 or 2, wherein the switch means turns on and off each time a signal from either the light receiving unit or the signal receiving unit is detected. Repeat alternately.
The non-contact switch according to claim 4 is the non-contact switch according to any one of claims 1 to 3, wherein a short de-energization period is provided in the AC power source when the switch means is energized, and the switch means is small at both ends. A voltage is generated to serve as a power source for the power supply unit, which allows continuous use.

In the non-contact switch according to any one of claims 1 to 4, since the on / off control of the switch means is performed by both the operation by the reflection type optical sensor and the remote controller, the electrical device is turned on and off depending on the situation of the user. You can choose.
In particular, since the circuit of the reflection type optical sensor and the remote control are separated, the reception distance (including sensitivity setting) can be set independently for these circuits.

In particular, in the non-contact switch according to claim 2, since the remote controller is provided with a light emitting unit that emits an optical signal, and the signal receiving unit and the light receiving unit of the reflective photosensor are combined, the circuit can be simplified. In addition, different signals can be transmitted from the light projecting unit of the reflective optical sensor and the light emitting unit of the remote controller. Accordingly, the detection distance of the reflection type photosensor can be shortened so that a reflected signal when a person or the like passes can be distinguished from an actual operation signal, and a non-contact switch with few malfunctions can be provided.

In the non-contact switch according to the third aspect, the switch means alternately turns on and off every time a signal from either the light receiving unit or the signal receiving unit is detected. The device is changed from an on state to an off state and from an off state to an on state, so that the operation can be simplified.

In the non-contact switch according to claim 4, since the AC power source is provided with a short period of time for non-energization, a small voltage is generated at both ends of the switch means, and the power source is used as a power source. It is not necessary and can be used continuously by replacing with a switch provided on a conventional wall or pillar.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
Here, FIG. 1 is a circuit diagram of a non-contact switch according to an embodiment of the present invention, FIG. 2 is a circuit diagram of a remote controller, and FIGS. 3A, 3B, and 4 are one embodiment of the present invention. FIG. 5A and FIG. 5B are explanatory diagrams showing a remote control signal and a self-luminous signal of a reflection type photosensor, respectively.

As shown in FIGS. 1 and 2, a non-contact switch 10 according to an embodiment of the present invention includes a switch unit 12 connected in series to an electric device (load) 11, a light projecting unit 13, and a light receiving unit 14. A reflection type optical sensor 15, a signal processing means 16 for receiving a signal from the light receiving unit 14, a power supply unit 17 for supplying power to them, a switch box 18 for storing them, and an optical signal to the light receiving unit 14. Has a remote control 19. In this embodiment, the light receiving unit 14 also serves as a signal receiving unit that receives a signal from the remote controller 19. These will be described in detail below.

The switch box 18 includes a connection terminal 20 and is connected in series to the electrical device 11, and the switch means 12 is provided inside. The switch means 12 includes a noise removing reactor 21 and a triac (an example of a semiconductor switch element) 22 connected in series with a circuit. A gate of the triac 22 and one terminal 22a include a phototriac 23, a resistor 24, and a diac 25. When the photo triac 23 is turned on, the triac 22 is turned on, whereby the power (indicated by Vcc) is turned on to the electrical device 11.

Since the diac 25 is a bidirectional element that conducts when a predetermined voltage is exceeded, eventually, if the voltage between the terminal 25a of the diac 25 and the other terminal 22b of the triac 22 exceeds a certain value, the triac 22 Turn on. The energization start phase of the triac 22 in this case is in the range of more than 0 and 25 degrees or less (preferably 5 to 20 degrees, more preferably 8 to 16 degrees) with respect to a half wave (half cycle) of 180 degrees AC. Thus, the conduction voltage of the diac 25 is set. As a result, a short non-energization period is generated in the TRIAC 22, a voltage of about 95% or more of the power supply voltage is applied to the load, and the load operates without trouble. The triac 22 is connected in parallel with a resistor 26 that absorbs an abnormal voltage, capacitors 27 and 28, and a varistor 29.

The power supply unit 17 includes a diode bridge 30 connected to the connection terminal 20 and a known constant voltage circuit 34 that is controlled to a constant voltage by a Zener diode 31 and transistors 32 and 33. In the power supply unit 17, when the triac 22 is off, a normal power supply voltage (for example, 100 V) is applied to the diode bridge 30 and a DC voltage of about 4 to 5 V is generated at the output, but the triac 22 is turned on. However, since the TRIAC 22 is phase-controlled, a sufficient voltage (for example, about 12V at a control angle of 5 degrees) is applied to the diode bridge 30 and stored in the capacitor 35, whereby the reflective photosensor 15 and Power can be supplied to the signal processing means 16. Reference numeral 36 denotes a limiting resistor, and 37 denotes a capacitor.

Next, the signal processing means 16 and the reflection type optical sensor 15 will be described. The signal processing means 16 includes a microcomputer chip 38. The microcomputer chip 38 has a CPU, a RAM, a ROM, and an interface for exchanging signals. The clock crystal 39 is connected to the outside, and the entire control program proceeds with a predetermined clock.
The microcomputer chip 38 includes an input terminal GP3 that receives the output of the light receiving unit 14 of the reflective photosensor 15, and output terminals GP0 and GP1 that provide a pulse signal to the light projecting unit 13 of the reflective photosensor 15. An output terminal GP2 for sending a signal to the switch means 12 is provided. A light emitting diode 40 for operation confirmation is connected to the output terminal GP2. In the ROM of the microcomputer chip 38, a program for performing signal processing to be described later is described.

The light projecting unit 13 of the reflective photosensor 15 includes a light emitting diode 43 connected in series to a resistor 41 and a transistor 42 so that the light emitting diode 43 is turned on when the transistor 42 is turned on and turned off when the transistor 42 is turned off. It has become. Two kinds of pulse signals are given to the transistor 42 via the variable resistors 44 and 45, and the light emitting diode 43 is lit in a pulsed manner (see FIG. 5) with the brightness controlled by the variable resistors 44 and 45. Yes. A light emitting diode 46 for confirming that a signal has entered is provided on the input side of the light projecting unit 13 so that the signal input can be confirmed.
The light receiving unit 14 of the reflection type optical sensor 15 has a light receiving sensor 47 and outputs a light receiving signal to the microcomputer chip 38. In addition, D1-D4 is a diode, and about a resistor and a capacitor | condenser, the actual number is described and description is abbreviate | omitted.

The switch means 12, the reflection type optical sensor 15, the signal processing means 16, and the power supply unit 17 for supplying power to these are housed in a switch box 18 as shown in FIG. It is embedded in the wall 49 etc. which is an example like the normal switch.
On the other hand, the remote controller 19 for sending a signal to the light receiving unit 14 is provided with a microcomputer chip 50 as shown in FIG. 2, and a preprogrammed signal (shown in FIG. 5) is provided by pressing a push button switch 51. The light is emitted from the light emitting diode 53 constituting the light emitting portion via the field effect transistor 52. Reference numeral 54 denotes a battery.

Subsequently, the programs described in the microcomputer chip 38 and the remote controller 19 will be described based on flowcharts with reference to FIG. 3 and FIG. 4, and the operation and effect of the present invention will also be described.
FIG. 3A shows the operation of the transmission output of the remote controller 19. When the push button switch 51 indicated by SW is pressed (step P 1), a 4-bit optical signal (remote control signal) is emitted from the light emitting unit. It has become. This is shown in FIG. 5 (A). First, when there is a 1.5 ms signal in the header, an optical signal of 0100 is emitted (step P2), and this is on condition that the push button switch 51 is on. Repeatedly at 34 ms, it is confirmed that the push button switch 51 is off (step P1), and the optical signal output is turned off (step P3).

FIG. 3B shows a procedure for generating a signal for controlling the light projecting unit 13 of the reflection type optical sensor 15. In step Q1, a 60 ms period timer is counted, and in the next step Q2, a 3 ms output timer is displayed. Is started, and an ON signal to be an optical pulse signal is issued (step Q3), the process returns to step Q1 and proceeds to step Q2, and when the output timer finishes counting 3 ms, the optical output signal is turned off (step Q4). When the above state is repeated and the cycle timer counts 60 ms in step Q1, the cycle timer and the output timer are reset (step Q5). As a result, a program for generating a pulse signal (self-emission signal) of 3 ms once every 60 ms as shown in FIG.

The light-emission signal and the remote control signal are received by the light receiving sensor 47, and the microcomputer chip 38 performs signal processing. This is shown in FIG.
First, it is determined whether or not the signal input in step S1 is a remote control signal. If it is not a remote control signal, it is confirmed that it is a self-emission signal (step S2), and it is confirmed that the pulse width is 3 ms. (Step S3). In step S4, the number of received pulses of 3 ms is counted and a timer A counter of 60 ms × 4 = 240 ms is started. In step S5, it is confirmed that the number of receptions exceeds 5 (that is, 300 ms has passed), and further, it is confirmed that timer A is counting up (OFF) (step S6), and the self-emission signal is output. Turn on (step S7). If the timer A has not counted up in step S6, there is a possibility of malfunction, so the self-luminous signal in step S4 is turned off to reset the number of receptions and return to the beginning (step S8).

If it is confirmed that the signal is not a self-emission signal in step S2, or if it is determined in step S3 that the pulse width is not 3 ms, the number of receptions is reset (step S9), and if the number of receptions is 5 or less in step S5. All return to the first step.
Further, if the signal from the microcomputer chip 38 to the light projecting unit 13 is too strong, the sensitivity of the reflection type optical sensor 15 becomes too strong. Therefore, a signal to the light projecting unit 13 of the microcomputer chip 38 is generated from the terminal GP0. The signal is adjusted by the variable resistor 44 to weaken the signal from the light emitting diode 43 as much as possible. As a result, as shown in FIG. 2, the distance that can be detected by the reflective optical sensor 15 is set to about 5 to 15 cm.
However, once the light receiving sensor 47 detects the signal in this way, the sensitivity of the light receiving sensor 47 is lowered. Therefore, after the light receiving sensor 47 detects the signal once, the same signal is generated from the terminal GP1 and is generated by the variable resistor 45. The light emitting diode 43 is driven as an input signal controlled to be larger. Thereby, the light receiving sensor 47 can detect the self-emission signal (that is, the reflection signal).

Next, when the remote control signal is recognized in step S1, the reception count starts (step S10), and it is confirmed that the remote control signal reception count exceeds 3 (ie, 4 or more). (Step S11) After confirming again that the past received data is correct (Step S12), the remote control reception output is turned on (Step S13). At the same time, the reception counter is reset. If the number of receptions is insufficient in step S11, the process returns to the beginning again and starts counting the remote control signal. If the received data is invalid in step S12, there is a possibility of malfunction, so the remote control reception output is left off and the number of receptions is reset (step S14).

In the case of the self-emission signal output (step S7) and the remote control reception output (step S13), a signal of 1 is output from the terminal GP2 (the terminal GP2 is 0 in the initial state), and the photo triac 23 Is turned on, and the electrical device 11 is kept on. Then, when there is another self-light emission signal output or remote control reception output, the output of the terminal GP2 is 0, the photo triac 23 is turned off, and the power supply to the electrical device 11 is turned off.

The present invention is not limited to the above embodiment, and can be changed without changing the gist of the present invention. For example, in this embodiment, the power of the power supply unit 17 is set to the phase angle φ of the phototriac 23. It was obtained from the power generated at both ends of the phototriac 23 between (0 to α) degrees when turned on in a small range, for example, when charging a battery with a rechargeable battery when the load is disconnected, The present invention is also applied to a case where a current is obtained by branching an energization current of a load.
In this embodiment, a continuous pulse is used as the self-emission signal. However, a code signal can be used, and a radio wave, an ultrasonic wave, or the like can be used as a medium as a remote controller.

It is a circuit diagram of the non-contact switch concerning one embodiment of the present invention. It is a circuit diagram of a remote control. (A), (B) is an operation | movement flowchart of the non-contact switch which concerns on one embodiment of this invention. It is an operation | movement flowchart of the non-contact switch which concerns on one embodiment of this invention. (A), (B) is explanatory drawing which shows the self-light-emission signal of a remote control signal and a reflection type optical sensor, respectively.

Explanation of symbols

10: Non-contact switch, 11: Electrical equipment, 12: Switch means, 13: Light projecting part, 14: Light receiving part, 15: Reflection type optical sensor, 16: Signal processing means, 17: Power supply part, 18: Switch box , 19: Remote control, 20: Connection terminal, 21: Reactor, 22: Triac, 22a, 22b: Terminal, 23: Phototriac, 24: Resistor, 25: Diac, 25a: Terminal, 26: Resistor, 27, 28: Capacitor , 29: Varistor, 30: Diode bridge, 31: Zener diode, 32, 33: Transistor, 34: Constant voltage circuit, 35: Capacitor, 36: Limiting resistor, 37: Capacitor, 38: Microcomputer chip, 39: Crystal, 40 : Light emitting diode, 41: Resistor, 42: Transistor, 43: Light emitting diode, 44, 45: Variable resistance , 46: light emitting diode, 47: light receiving sensor, 49: wall, 50: microcomputer chip, 51: push-button switch, 52: field effect transistor, 53: light emitting diode, 54: battery

Claims (4)

A non-contact switch that includes a switch box and is used to turn on and off electrical devices that are attached to a building and connected in series.
Switch means provided in the switch box and connected in series to the electrical device;
A reflective optical sensor in which a light receiving unit and a light projecting unit are provided in the switch box;
A signal receiving unit that is provided in the switch box and receives a signal input from a remote controller provided separately;
A signal processing unit that receives a signal from one of the light receiving unit and the signal receiving unit and turns the switch unit on and off;
A non-contact switch comprising: a reflection type optical sensor; the signal receiving unit; and a power source unit that supplies power to the signal processing unit. 2. The non-contact switch according to claim 1, wherein the remote controller is provided with a light emitting unit that emits an optical signal, and the signal receiving unit and the light receiving unit of the reflective photosensor are used together. An optical signal from the light projecting unit of the sensor and an optical signal emitted from the light emitting unit of the remote controller are different signals, and the signal received through the light receiving unit is identified by the signal processing unit, and the switch unit is turned on / off. A non-contact switch characterized by that. 3. The non-contact switch according to claim 1, wherein each time the switch unit detects a signal from one of the light receiving unit and the signal receiving unit, the switch unit alternately turns on and off. Non-contact switch characterized by. The non-contact switch according to any one of claims 1 to 3, wherein when the switch means is energized, a short period is provided in the AC power supply to generate a small voltage across the switch means, A non-contact switch characterized by being used as a power source for a power supply unit.

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