JP6771198B2 - Sensor device and lighting system - Google Patents

Description

The present disclosure relates to a sensor device and a lighting system using the sensor device.

Patent Document 1 discloses a lighting system that supplies AC power from a commercial AC power source to a lighting fixture or the like, and controls the lighting fixture based on an operation signal of an external operating means and a detection signal of a motion sensor. Has been done. Further, in a lighting system incorporating a sensor device such as a motion sensor, a system that supplies power to a lighting fixture and a sensor device from a DC power source instead of supplying power from a commercial AC power source is also known. There is.

Japanese Unexamined Patent Publication No. 2005-285542

By the way, when incorporating a sensor device into a lighting system using a DC power supply, a mechanism is conceivable in which a detection signal of the sensor device is transmitted to a master unit that controls the lighting equipment by using a radio device or a signal line. However, such a system has problems such as an increase in cost due to the use of a radio or an increase in construction load due to the use of a signal line.

The sensor device according to one aspect of the present disclosure transmits the signal to the power line of the lighting system to which the DC voltage is applied and the lighting device and the signal transmitting device that outputs a control signal to the lighting device are connected. A sensor device connected to the output side of the device, which is formed by a sensing unit that detects an object and outputs a detection signal, and a predetermined on / off operation set corresponding to the detection signal of the sensing unit. It is characterized by including a switch that superimposes a detection signal on the DC voltage and transmits the detection signal to the signal transmission device.

The lighting system according to one aspect of the present disclosure is for operating the DC power supply device that outputs a DC voltage, the power supply line to which the DC voltage is applied, the lighting equipment connected to the power supply line, and the lighting equipment. The operation unit, the signal transmission device connected to the DC power supply side of the lighting equipment in the power supply line, and transmitting the first control signal based on the operation signal of the operation unit to the lighting equipment, and the power supply line. The sensor device is provided with the sensor device connected to the output side of the signal transmission device, and the sensor device superimposes the detection signal of the sensing unit on the DC voltage by a predetermined on / off operation of the switch. The signal transmitting device transmits to the transmitting device, and the signal transmitting device transmits a second control signal based on the detection signal of the sensor device to the lighting device.

According to the sensor device according to one aspect of the present disclosure, in a lighting system using a DC power supply, a lighting fixture is used based on the detection information without using a radio and a signal line for transmitting the detection information of the sensor device. It is possible to control. By using the sensor device which is one aspect of the present disclosure, the radio device and the signal line are not required, and a lighting system having good workability can be constructed at low cost.

It is a block diagram of the lighting system which is an example of an embodiment. It is a figure which shows an example of the output voltage of a signal transmitter. It is a block diagram of the lighting equipment which constitutes the lighting system shown in FIG. It is a circuit diagram of the sensor device which is an example of an embodiment. It is a block diagram of the lighting system which is another example of an embodiment. It is a block diagram of the lighting equipment which constitutes the lighting system shown in FIG. It is a figure which shows another example of the output voltage of a signal transmitter. It is a block diagram of the lighting system which is another example of an embodiment.

Hereinafter, embodiments of the sensor device and the lighting system of the present disclosure will be described in detail with reference to the drawings. However, the sensor device and the lighting system of the present disclosure are not limited to the embodiments described below. In addition, it is assumed from the beginning that the components of the plurality of embodiments described below are selectively combined.

FIG. 1 is a block diagram showing a configuration of a lighting system 10 which is an example of an embodiment. Hereinafter, the configuration of the lighting system 10 will be described in detail with reference to FIG. 1, but FIGS. 2 to 4 will be referred to as appropriate. FIG. 2 is a diagram showing an example of the output voltage V2 of the signal transmission device 16. FIG. 3 is a block diagram of the lighting fixture 20, and FIG. 4 is a circuit diagram of the sensor device 30.

As illustrated in FIG. 1, the lighting system 10 includes a DC power supply device 11 that outputs a DC voltage, a power supply line to which the DC voltage is applied, a lighting fixture 20 connected to the power supply line, and a lighting fixture 20. It is provided with an operation unit 17 for operating the above. Further, the lighting system 10 is connected to the DC power supply device 11 side of the lighting fixture 20 in the power supply line to which the DC voltage is applied, and the control signal SC1 (first control signal) based on the operation signal of the operation unit 17 is connected to the lighting fixture. A signal transmission device 16 for transmitting to 20 and a sensor device 30 are provided. The sensor device 30 is connected to the output side of the signal transmission device 16 in the power line.

As will be described in detail later, the sensor device 30 includes a sensing unit 31 and a switch 32, and by a predetermined on / off operation of the switch 32, the detection signal of the sensing unit 31 is superimposed on the DC voltage and transmitted to the signal transmitting device 16. Then, the signal transmission device 16 transmits the control signal SC2 (second control signal) based on the detection signal of the sensor device 30 to the luminaire 20.

The lighting system 10 includes a main power supply line 12 extending from the DC power supply device 11. The signal transmission device 16, the luminaire 20, and the sensor device 30 are connected to the main power line 12. In the present embodiment, a plurality of lighting fixtures 20 are connected to the main power supply line 12 via branch wirings 15. The main power supply line 12 is a power supply line to which a plurality of devices including a signal transmission device 16, a lighting fixture 20, and a sensor device 30 are connected, and is a power supply path for supplying electric power to the plurality of devices. It is different from the branch wiring 15 which is a power supply line connecting one lighting fixture 20 and the main power supply line 12.

The lighting system 10 includes, for example, one signal transmitting device 16, two lighting fixtures 20, and one sensor device 30. In the example shown in FIG. 1, the signal transmission device 16, the lighting fixture 20, the sensor device 30, and the lighting fixture 20 are connected to the main power supply line 12 in this order from the DC power supply device 11 side. The luminaire 20 and the sensor device 30 may be connected to the output side of the signal transmission device 16 in the main power line 12, and the order of these connections is not particularly limited. From the viewpoint of S / N of the detection signal transmitted from the sensor device 30, it is advantageous to connect the sensor device 30 to the signal transmission device 16 side rather than the lighting fixture 20.

The number of lighting fixtures 20 constituting the lighting system 10 may be one or three or more. Further, a plurality of signal transmission devices 16 and sensor devices 30 may be used, but in the present embodiment, one is used one by one.

The lighting fixture 20 and the sensor device 30 constituting the lighting system 10 are installed indoors, for example, in a residence, an office, a commercial facility, a factory, or the like. In the present embodiment, the signal transmission device 16, the operation unit 17, the lighting fixture 20, and the sensor device 30 are installed in the same area such as the same room and the same corridor. The DC power supply device 11 may be installed in the same place as the lighting fixture 20 or the like, or may be installed in a different place.

The lighting system 10 may be provided with a signal line for transmitting the operation signal of the operation unit 17 to the signal transmission device 16. An example of the operation unit 17 is a so-called wall switch that is attached to the wall surface or the like of a room in which the lighting fixture 20 and the sensor device 30 are installed. In this case, the signal transmission device 16 may be built in the wall switch. Another example of the operation unit 17 is a remote controller. In this case, the operation signal (radio signal) is transmitted to the signal transmission device 16 by the radio. Further, the lighting system 10 may have both a wall switch and a remote controller as the operation unit 17.

When the operation unit 17 is a remote controller, the radio signal reception unit may be provided in, for example, the signal transmission device 16 or the switch control unit 33 of the sensor device 30. When the receiving unit of the operating unit 17 is provided in the sensor device 30, the operating signal of the operating unit 17 is transmitted by the on / off operation of the switch 32 as in the case of transmitting the detection signal of the sensing unit 31 to the signal transmitting device 16. It is transmitted to 16.

In the example shown in FIG. 1, a dimming operation button 18 for dimming the lighting fixture 20 and a display unit 19 are provided on the operation unit 17. The dimming operation button 18 is composed of a button 18A for raising the dimming level and a button 18B for lowering the dimming level. The display unit 19 is, for example, a level meter that displays the setting of the dimming level. The configuration of the operation unit 17 is not particularly limited, and the operation unit 17 may be provided with, for example, a toning operation button for changing the color temperature of the lighting fixture 20, and the dimming operation button and the toning may be provided. Both operation buttons may be provided.

The DC power supply device 11 that outputs a DC voltage is a device that is connected to a commercial AC power supply AC and converts the AC voltage of the AC power supply AC into a DC voltage. The AC power supply AC is generally connected to the DC power supply device 11 via a distribution board (not shown) including a breaker. The DC power supply device 11 includes, for example, an AC / DC converter and a control circuit for controlling the converter. As the DC power supply device 11, a power storage device such as a secondary battery, a solar cell for generating DC power, a fuel cell, or the like may be used in combination.

The DC voltage V1 output from the DC power supply device 11 is, for example, 36V. The DC power supplied from the DC power supply device 11 by the main power supply line 12 is supplied to the lighting fixture 20 and the sensor device 30 via the signal transmission device 16. DC power may be supplied to the operation unit 17 from the DC power supply device 11, or power may be supplied from another power source such as a battery.

In the present embodiment, the main power supply line 12 extending from the DC power supply device 11 is composed of two power lines 12A on the high potential side and 12B on the low potential side. The low potential side power supply line 12B is preferably grounded. Further, two main power lines 13 connecting the DC power supply device 11 and the sensor device 30 (input section), two main power supply lines 14 connected to the output section of the sensor device 30, and two lines described later. Two main power lines 12 are configured by the main power lines 36 of the above.

As described above, the signal transmission device 16 is connected to the DC power supply device 11 side of the lighting fixture 20 and the sensor device 30 in the main power supply line 12, receives the operation signal of the operation unit 17, and controls based on the operation signal. It has a function of transmitting the signal SC1 to the lighting fixture 20. Further, the signal transmission device 16 has a function of receiving the detection signal of the sensor device 30 and transmitting the control signal SC2 based on the detection signal to the lighting fixture 20. The control signals SC1 and SC2 are signals for dimming or toning the lighting fixture 20, or signals for turning on, turning off, or blinking.

The signal transmission device 16 is composed of, for example, a voltage conversion circuit such as a step-down converter and a control circuit for controlling the voltage conversion circuit. The signal transmission device 16 takes the DC voltage V1 output from the DC power supply device 11 as an input, and outputs the DC voltage V2 to the main power supply line 12. When the signal transmitting device 16 is in a steady state described later, the DC voltages V1 and V2 are substantially the same. Further, the signal transmitting device 16 has, for example, a receiving circuit that receives the detection signal of the sensor device 30 and transmits it to the control circuit.

The receiving circuit of the signal transmitting device 16 has a means for detecting a change in the current voltage of the main power supply line 12 due to the on / off of the switch 32 of the sensor device 30, and the sensor device superimposed on the DC voltage by detecting the change. Read the detection signal of 30. The operation signal of the operation unit 17 is directly input to the control circuit, for example, but when the operation signal is transmitted via the sensor device 30 as described above, it is read by the reception circuit. Then, the control circuit controls the voltage conversion circuit based on the operation signal of the operation unit 17 and the detection signal of the sensor device 30, and outputs the control signals SC1 and SC2 having the voltage waveform described later.

As illustrated in FIG. 2, the signal transmitting device 16 takes two states, a steady state and a communication state. The communication state is a state in which control signals SC1 and SC2 are output, and the steady state is a state in which control signals SC1 and SC2 are not output. The signal transmitting device 16 receives the operation signal of the operation unit 17 and the detection signal of the sensor device 30 to enter the communication state, and after shifting to the communication state, returns to the steady state after a certain period of time elapses. For example, when the detection signal of the sensor device 30 is transmitted at a constant cycle, the steady state and the communication state may be repeated at a constant cycle.

In the steady state shown in FIG. 2A, the signal transmission device 16 outputs a constant voltage V21 as an output voltage V2. The voltage V21 is substantially the same as the output voltage V1 of the DC power supply device 11, for example. On the other hand, in the communication state shown in FIG. 2B, for example, the output voltage V2 is lowered from V21 to V22 at regular intervals to generate a voltage waveform in which the output voltage V2 regularly changes between V21 and V22.

The signal transmission device 16 transmits the voltage waveform in which the output voltage V2 changes regularly to the luminaire 20 as control signals SC1 and SC2. The voltage waveforms of the control signals SC1 and SC2 are preset based on the operation signal of the operation unit 17 and the detection signal of the sensor device 30. Signals having the same voltage waveform can also be used as the control signals SC1 and SC2. In the example shown in FIG. 2, V22 is smaller than V21, but V22 may be larger than V21.

As described above, the plurality of luminaires 20 are each connected to the main power supply line 12 via the branch wiring 15, and are controlled by the control signals SC1 and SC2 output from the signal transmission device 16. The luminaire 20 generally has a light source 21 and a lighting device 22 for stably lighting the light source 21. Examples of the lighting fixture 20 include incandescent lamps, fluorescent lamps, LEDs (light emitting diodes), and the like, but LEDs are particularly suitable for the lighting system 10. The LED is not limited to the inorganic LED, and may be an organic LED (OLED). The plurality of lighting fixtures 20 may be different types of fixtures, but in the present embodiment, the same fixtures are used.

As illustrated in FIG. 3, when the luminaire 20 is an LED, the lighting device 22 preferably has a constant current circuit 23 for keeping the current flowing through the light source 21 constant. The luminaire 20 is configured such that a light source 21 is connected to the output unit of the constant current circuit 23, and the current flowing through the light source 21 is controlled by the constant current circuit 23. The luminaire 20 (light source 21) may be dimmed or toned by, for example, current control of the constant current circuit 23, and may be turned on, off, or blinking. Further, the lighting device 22 has a receiving circuit 24. The receiving circuit 24 has, for example, a means for detecting the DC voltage V2, and reads the control signals SC1 and SC2 of the signal transmitting device 16 superimposed on the DC voltage.

In the lighting fixture 20, the receiving circuit 24 reads the control signals SC1 and SC2 and transmits them to the constant current circuit 23, and the constant current circuit 23 controls the current flowing through the light source 21 based on the control signals SC1 and SC2. The control signals SC1 and SC2 may include unique information (address information) for identifying each of the lighting fixtures 20. In this case, the receiving circuit 24 of each luminaire 20 acquires only the unique control signals SC1 and SC2 corresponding to the luminaire. As a result, only the specific luminaire 20 can be dimmed or toned, or only the specific luminaire 20 can be turned on, off, or blinked.

The sensor device 30 has a function of detecting the presence of an object in the detection area and transmitting a detection signal to the signal transmission device 16. The detection area can be appropriately changed depending on the type, setting, installation location, etc. of the sensor device 30. The detection area may be the entire area where the sensor device 30 is installed, or may be a part of the area. The detection target by the sensor device 30 may be any one that triggers the lighting of the lighting fixture 20, and examples thereof include abnormalities such as a person, illuminance, and fire. The luminaire 20 is controlled based on the detection information of the sensor device 30, but the control mode is not limited to lighting, and may be in a blinking state or may be turned off from the lit state. Details of the control mode of the luminaire 20 will be described later.

Examples of the sensor device 30 include a motion sensor device, an illuminance sensor device, an abnormality detection sensor device, and the like. The motion sensor device detects the presence of a person in the detection area by, for example, detecting infrared rays radiated from the human body. The illuminance sensor device detects the brightness of the detection area by acquiring the reflected light from, for example, the floor surface in the detection area. The abnormality detection sensor device detects that an abnormality such as a fire has occurred in or near the detection area by detecting, for example, a temperature rise due to a fire, smoke, flame, or a gas such as carbon dioxide.

As described above, the sensor device 30 is connected to the output side of the signal transmission device 16 with respect to the main power supply line 12 which is the power supply line to which the signal transmission device 16 and the lighting fixture 20 are connected while the DC voltage is applied. Has been done. The sensor device 30 includes a first terminal 34 which is an input side terminal and a second terminal 35 which is an output side terminal. In the present embodiment, the main power line 13 is connected to the first terminal 34, and the main power line 14 is connected to the second terminal 35. The sensor device 30 is provided with a main power supply line 36 that connects the first terminal 34 and the second terminal 35 inside the device and constitutes the main power supply line 12 together with the main power supply lines 13 and 14.

The sensor device 30 superimposes the detection signal on the DC voltage by the sensing unit 31 that detects the object and outputs the detection signal and the predetermined on / off operation set corresponding to the detection signal of the sensing unit 31. A switch 32 for transmitting to the signal transmitting device 16 is provided. In the present embodiment, the switch 32 is installed on the main power supply line 36 constituting the main power supply line 12. The switch 32 may be installed on one of the two power supply lines constituting the main power supply line 36, and is installed on the high potential side power supply line 12A in the example shown in FIG. The switch 32 can also be installed between the high potential side power supply line 12A and the low potential side power supply line 12B. In this case, turning on the switch 32 short-circuits the two power lines.

The switch 32 turns on and off in a preset pattern based on the detection signal of the sensing unit 31, and generates a transmission signal based on the detection signal. As will be described in detail later, the on / off control of the switch 32 is executed by the switch control unit 33. As shown in FIG. 1, when the luminaire 20 is connected to the output side of the sensor device 30, it is preferable to turn on / off the switch 32 at high speed so as not to significantly affect the lighting state of the luminaire 20.

In the lighting system 10, the switch 32 repeatedly connects and disconnects the input side and the output side of the main power supply line 12 at high speed, so that the transmission signal based on the detection signal is superimposed on the DC voltage of the main power supply line 12. Then, when the signal transmission device 16 reads the change in the current and voltage of the main power supply line 12, the detection signal of the sensing unit 31 is transmitted to the signal transmission device 16. That is, since the detection information of the sensor device 30 is transmitted to the signal transmission device 16 via the main power supply line 12 by the on / off operation of the switch 32, the detection information of the sensor device 30 is transmitted to the signal transmission device 16 using a radio or a signal line. There is no need to transmit to 16.

For example, while the detection signal of the sensing unit 31 is being output, the switch 32 continues a predetermined on / off operation set corresponding to the detection signal at a constant cycle. While the detection signal of the sensing unit 31 is being output, the switch 32 may repeat a communication state which is a predetermined on / off state based on the detection signal and a steady state which is an on state at a constant cycle. The steady state of the switch 32 may be in the off state.

It is preferable that the sensor device 30 transmits the detection signal by the predetermined on / off operation of the switch 32 when the control signal SC1 based on the operation signal of the operation unit 17 is not output from the signal transmission device 16. By transmitting the detection signal from the sensor device 30 when the control signal SC1 is not output, it is possible to prevent signal collision due to bidirectional communication. The sensor device 30 has, for example, a receiving circuit that receives the control signal SC1 and transmits it to the switch control unit 33. Then, the switch control unit 33 turns the switch 32 on and off at the timing when the control signal SC1 is not output, and transmits the detection signal to the signal transmission device 16. The lighting system 10 may be configured to retransmit the control signal SC1 when the detection signal overlaps with each other.

It is preferable that the sensing unit 31, the switch 32, and the switch control unit 33 are incorporated and integrated in the same case (not shown) constituting the sensor device 30. By integrating these, the workability of the sensor device 30 is improved. However, it is possible to separate the switch 32 and install it on the main power line 13, for example.

Here, the configuration of the sensor device 30 will be described in more detail with reference to FIG. FIG. 4 shows an example of the circuit configuration of the sensor device 30.

As illustrated in FIG. 4, the sensor unit 31 of the sensor device 30 includes a sensor unit 40 including a sensor element and a control determination unit 41 that outputs a signal for controlling on / off of the switch 32. The switch control unit 33 of the sensor device 30 includes a control power supply unit 42 and a switch drive unit 43. In the example shown in FIG. 4, the photoMOS relay (IC1) mounted on the switch drive unit 43 is installed on the high potential side power supply line 12A of the main power supply line 36, and constitutes the switch 32.

The switch control unit 33 is further provided with diodes (D1 and D2) for connecting the high potential side power supply line 12A of the main power supply line 36 and the control power supply unit 42. In the high potential side power supply line 12A, the diode (D1) is connected between the first terminal 34 and the switch 32, and the diode (D2) is connected between the switch 32 and the second terminal 35. In FIG. 4, the input side terminal (input unit) to which the main power supply line 13 is connected is referred to as the first terminal 34, and the output side terminal (output unit) to which the main power supply line 14 is connected is referred to as the second terminal 35. The 1st terminal 34 may be an output unit and the 2nd terminal 35 may be an input unit. Since the sensor device 30 illustrated in FIG. 4 does not have the directionality of connection, better workability can be obtained by using this device.

The control power supply unit 42 connected to the high potential side power supply line 12A via the diodes (D1, D2) includes, for example, a Zener diode (ZD1), a MOS field effect transistor (MOSFET: Q2), a capacitor (C1, C2), and It is composed of resistors (R1, R2, R3). The control power supply unit 42 generates a DC voltage of 5V used by the switch drive unit 43 from, for example, a DC voltage V1 of 36V. Further, the DC voltage of 5V is also supplied to the sensing unit 31. The control power supply unit 42 may be composed of a 3-terminal regulator, a power supply IC, or the like.

The switch drive unit 43 to which power is supplied from the control power supply unit 42 is composed of, for example, a photoMOS relay (IC1), a MOSFET (Q3), and a resistor (R11) constituting the switch 32. The photoMOS relay (IC1) generally contains an LED, a photodiode array, and a MOSFET. As will be described later, the MOSFET (Q3) is driven by the detection signal (signal S1) of the sensing unit 31, and at this time, a current flows through the LED of the photoMOS relay (IC1) and the LED emits light. Then, the photodiode array receives the light to generate a voltage, and the voltage becomes the gate voltage to drive the MOSFET, that is, the switch 32 is turned on.

As described above, the sensing unit 31 that detects an object (person) and outputs a detection signal to the control power supply unit 42 has a sensor unit 40 and a control determination unit 41. In the example shown in FIG. 4, a pyroelectric element (PIR1) for detecting infrared rays radiated from the human body is provided as a sensor element for detecting human sensation. As the sensor element for detecting human sensation, in addition to the pyroelectric element (PIR1), a radio wave type Doppler sensor element, an image sensor element such as CCD or CMOS may be used. The sensor element is appropriately selected according to the object to be detected.

The pyroelectric element (PIR1) generally contains a pyroelectric body, a resistor (R4), and a junction field effect transistor (JFET: Q4). In the JFET (Q4), the drain terminal is connected to the power supply and the gate terminal is connected to the pyroelectric body. When infrared rays enter the pyroelectric body, a weak signal is output from the pyroelectric body, and the gate voltage of the JFET (Q4) changes. As a result, the amount of current flowing out from the source terminal changes, and the potential difference between both ends of the resistor (R5) connected in the vicinity of the source terminal changes, so that the fluctuation of infrared rays caused by the movement of a person is detected.

The sensor unit 40 is composed of, for example, the pyroelectric element (PIR1), the resistor (R5), the operational amplifier (IC3), the comparator (IC4), the resistor (R6, R7, R8, R9), and the capacitor (C4, C5). Will be done. The sensor unit 40 amplifies the detection signal output as a voltage from the pyroelectric element (PIR1) by the operational amplifier (IC3), and compares the amplified detection signal with an arbitrary threshold value by the comparator (IC4). Then, if the detection signal is equal to or higher than the threshold value, the signal S is output from the comparator (IC4) to the control determination unit 41.

The control determination unit 41 in which the signal S is input from the sensor unit 40 is composed of, for example, a microcomputer (IC2). The microcomputer (IC2) outputs a signal S1 for turning on the switch 32 based on the input signal S to the MOSFET (Q3) of the switch drive unit 43. The microcomputer (IC2) intermittently outputs the signal S1 corresponding to the signal S in order to turn the switch 32 on and off at high speed. For example, while the signal S is being output, the intermittent output of the signal S1 and the continuous output of the signal S1 are repeated at regular intervals. Then, the MOSFET (Q3) is driven by the signal S1 output from the microcomputer (IC2), and the photoMOS relay (IC1) constituting the switch 32 is turned on and off at high speed.

Examples of the sensor device 30 constituting the lighting system 10 include a motion sensor device, an illuminance sensor device, an abnormality detection sensor device, and the like, as described above. When the sensor device 30 is a motion sensor device, when the sensor unit 40 of the sensing unit 31 detects that a person is in the detection area, the detection signal is transmitted to the signal transmitting device 16 by turning the switch 32 on and off. .. Then, the signal transmission device 16 outputs the control signal SC2 based on the detection signal of the sensor device 30, and the lighting fixture 20 is turned on.

Specifically, when the sensor unit 40 detects a person in the detection area, the sensor unit 40 outputs a signal S, and the control determination unit 41 intermittently outputs the signal S1 based on the signal S. As a result, the photoMOS relay (IC1) constituting the switch 32 is turned on and off at high speed, and the detection signal superimposed on the DC voltage of the main power supply line 12 is transmitted to the signal transmission device 16. Then, the signal transmission device 16 transmits the control signal SC2 based on the detection signal to the luminaire 20. The control signal SC2 is read by the receiving circuit 24 of the lighting device 22 and transmitted to the constant current circuit 23, and the constant current circuit 23 controls the lighting state of the lighting fixture 20 based on the control signal SC2.

Once the signal S is output from the sensor unit 40, the luminaire 20 may continue to be lit for a certain period of time. That is, the shortest operating time t1 which is the shortest time for the lighting fixture 20 to continue lighting from the start of the output of the signal S may be set. Further, the luminaire 20 may continue to be lit for a certain period of time even when the output of the signal S is stopped once the signal S is output. That is, the detection delay time t2, which is the shortest time for the lighting fixture 20 to continue lighting after the output of the signal S is stopped, may be set. The times t1 and t2 are set to, for example, several tens of seconds to several minutes.

When a general pyroelectric element is used as the sensor element, if the movement of a person is small, even if there is a person in the detection area, it may not be detected and the output of the signal S may stop. However, set the times t1 and t2. Therefore, it is possible to prevent the lighting fixture 20 from turning off when there is a person.

Further, even when the sensor device 30 is an illuminance sensor device or an abnormality detection sensor device, the detection signal is transmitted by a predetermined on / off operation of the switch 32 based on the detection signal of the detection unit 31 as in the case of the human sensor device. It is transmitted to the signal transmission device 16. When the sensor device 30 is an illuminance sensor device, the signal transmission device 16 outputs a control signal SC2 based on the detection signal, and dims the lighting fixture 20 to an appropriate brightness according to the detected illuminance level.

In the case of the abnormality detection sensor device, it is preferable to blink the lighting fixture 20 while the detection unit 31 detects an abnormality such as a fire. The blinking of the luminaire 20 is performed at intervals that can be recognized by a person. By blinking the lighting fixture 20, the person at that location can instantly recognize that an abnormal situation such as a fire has occurred, and can evacuate quickly. The blinking of the lighting fixture 20 may be continuously performed while the detection unit 31 detects an abnormality, but it is preferable to repeat the blinking state and the lighting state in consideration of safety at the time of evacuation.

As described above, according to the lighting system 10 provided with the sensor device 30, the detection signal is transmitted to the main power supply line by a predetermined on / off operation of the switch 32 based on the detection signal of the detection unit 31 (signal S of the sensor unit 40). It can be superimposed on the DC voltage of 12 and transmitted to the signal transmission device 16. Therefore, a radio or signal line for transmitting the detection information of the sensor device 30 to the signal transmission device 16 is unnecessary. Therefore, the lighting system 10 can be an inexpensive system with good workability.

The above-described embodiment can be appropriately redesigned as long as the object of the present disclosure is not impaired. 5 and 8 show lighting systems 50 and 70, which are other examples of the embodiment. 5 and 8 are block diagrams of the entire system corresponding to FIG. 1, and FIG. 6 is a block diagram of the lighting fixture corresponding to FIG. FIG. 7 shows an example of the voltage waveform of the control signal SC1 output from the signal transmission device 16. In the following, the same reference numerals are used for the same components as those in the above-described embodiment, and duplicate description will be omitted.

The lighting system 50 illustrated in FIG. 5 differs from the lighting system 10 in that it includes a signal line 51 for transmitting a control signal SC1 (first control signal) from the signal transmission device 16 to the lighting fixture 60. The luminaire 60 has the same configuration as the luminaire 20 except that it has a lighting device 62 that receives the control signal SC1 via the signal line 51. Further, the lighting system 50 is different from the lighting system 10 in that all the lighting fixtures 20 are connected to the DC power supply device 11 side of the sensor device 30 in the main power supply line 12.

The signal line 51 is connected to the lighting device 62 of each luminaire 60 from the output unit of the signal transmission device 16. Similar to the main power supply line 12, the signal line 51 is composed of two lines, a high potential side signal line 51A and a low potential side signal line 51B. In the example shown in FIG. 5, the low-potential side wiring of the signal line 51 is common to the low-potential side wiring of the main power supply line 12. That is, the low potential side power supply line 12B and the low potential side signal line 51B are also used. The high-potential side wiring of the signal line 51 may be shared with the high-potential side wiring of the main power supply line 12.

As illustrated in FIG. 6, the signal line 51 is connected to the receiving circuit 24 of the lighting device 62, and the control signal SC1 based on the operation signal of the operation unit 17 is transmitted to the receiving circuit 24 via the signal line 51. .. In the lighting system 10, since the detection signal and the control signal SC1 of the sensor device 30 are transmitted via the main power supply line 12, signal collision may occur due to bidirectional communication. However, according to the lighting system 50, the signal line The 51 ensures that such signal collisions are prevented. The receiving circuit 24 reads the control signal SC1 and transmits it to the constant current circuit 23, and the constant current circuit 23 controls the current flowing through the light source 21 based on the control signal SC1.

As illustrated in FIG. 7, the signal transmission device 16 generates a control signal SC1 having a voltage waveform in which the output voltage V3 regularly changes between V31 and 0V based on the operation signal of the operation unit 17. The control signal SC1 is, for example, a PWM signal for controlling the dimming level of the lighting fixture 60. The voltage waveform of the control signal SC1 shown in FIG. 7 is generated by switching the output voltage V3 between V31 and 0V, but may be a voltage waveform that does not drop the output voltage V3 to 0V. The DC voltage V3 applied to the signal line 51 may be lower than the DC voltage V2 applied to the main power supply line 12.

The lighting system 70 illustrated in FIG. 8 is different from the lighting system 10 in that it includes a DC power supply device 11, a signal transmission device 16, and a controller 71 in which an operation unit 17 is integrated. The operation unit 17 constituting the controller 71 is, for example, a wall switch device, and the DC power supply device 11 and the signal transmission device 16 are built in the device. In addition, only the DC power supply device 11 and the signal transmission device 16 may be integrated, and the operation unit 17 may not be integrated. Alternatively, the signal transmission device 16 and the operation unit 17 may be integrated, and the DC power supply device 11 may not be integrated.

10,50,70 Lighting system, 11 DC power supply, 12, 13, 14, 36,61 Main power line, 12A high potential side power line, 12B low potential side power line, 15 branch wiring, 16 signal transmitter, 17 Operation unit, 18 dimming operation button, 18A, 18B button, 19 display unit, 20,60 lighting equipment, 21 light source, 22,62 lighting device, 23 constant current circuit, 24 receiving circuit, 30 sensor device, 31 sensing unit, 32 switch, 33 switch control unit, 34 1st terminal, 35 2nd terminal, 40 sensor unit, 41 control judgment unit, 42 control power supply unit, 43 switch drive unit, 51 signal line, 51A high potential side signal line, 51B low Potential side signal line, 71 controller

Claims (6)

A sensor device connected to the output side of the signal transmitter with respect to the power line of the lighting system to which the DC voltage is applied and the lighting fixture and the signal transmitter that outputs a control signal to the lighting fixture are connected. There,
A sensing unit that detects an object and outputs a detection signal,
A switch that superimposes the detection signal on the DC voltage and transmits it to the signal transmission device by a predetermined on / off operation set corresponding to the detection signal of the detection unit.
A sensor device. The sensor device according to claim 1, wherein the switch is installed in a main power line to which the signal transmitting device and the lighting fixture are connected. A DC power supply that outputs a DC voltage and
The power line to which the DC voltage is applied and
Lighting equipment connected to the power line and
An operation unit for operating the lighting fixture and
A signal transmission device that is connected to the DC power supply device side of the lighting fixture in the power supply line and transmits a first control signal based on an operation signal of the operation unit to the lighting fixture.
The sensor device according to claim 1 or 2, which is connected to the output side of the signal transmission device in the power line.
With
The sensor device superimposes the detection signal of the sensing unit on the DC voltage and transmits the detection signal to the signal transmission device by a predetermined on / off operation of the switch.
The signal transmission device is a lighting system that transmits a second control signal based on the detection signal of the sensor device to the luminaire. The lighting system according to claim 3, wherein the switch of the sensor device is installed in a main power line to which the signal transmitting device and the lighting fixture are connected. The lighting system according to claim 3 or 4, wherein the sensor device transmits the detection signal by the predetermined on / off operation of the switch when the first control signal is not output from the signal transmission device. The lighting system according to claim 3 or 4, further comprising a signal line for transmitting the first control signal from the signal transmitting device to the luminaire.

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