MOTION DETECTION SYSTEM, CONTROL SYSTEM, CONNECTION EQUIPMENT AND LOAD SYSTEM

Abstract

The purpose of the invention is to make the motion of an object detectable in the direction intersecting with the direction in which the radio wave is transmitted. The invention relates to a system for detecting moving objects (1) comprising a radio wave sensor (10) and an object detector (22). The radio wave sensor (10) transmits a transmitted wave as a frequency-modulated radio wave into real space at each of several time- and level-dependent detection points, which, upon receiving the corresponding reflected wave that has been reflected from the object, outputs a signal based on the transmitted wave and the reflected wave. The object detector (22) detects, based on several output signals supplied from the radio wave sensor (10) at several time-dependent detection points, respectively, the motion of the object in the second direction intersecting with the first direction. The first direction is the direction in which the radio wave is transmitted. The operational information collector (23) collects operational information about the operational target based on the motion of the object in the second direction.

Description

Motion detection systems, control systems, wiring devices, and load systems

[0001] The present disclosure relates to a motion detection system, a control system, a wiring device, and a load system. More particularly, the present disclosure relates to a motion detection system, a control system, a wiring device, and a load system that detect a moving object using a radio wave sensor.

[0002] Patent Document 1 discloses an intrusion detection device comprising a transmitting means, a receiving means, a received wave intensity measuring means, and a human body determining means. The transmitting means transmits radio waves into a detection area. The receiving means receives reflected waves of the transmitted radio waves. The received wave intensity measuring means measures the intensity of the received waves received by the receiving means. The human body determining means determines whether a human body has entered the detection area based on the measured received wave intensity.

[0003] Japanese Patent Application Laid-Open No. 2002-236171

[0004] An object of the present disclosure is to provide a moving object detection system, a control system, a wiring device, and a load system that are capable of acquiring operation information based on the movement of an object in a direction intersecting the transmission direction of radio waves.

[0005] A moving object detection system according to one aspect of the present disclosure includes a radio wave sensor, an object detection unit, and an operation information acquisition unit. The radio wave sensor transmits a transmission wave, which is a frequency-modulated radio wave, into real space at each of a plurality of detection times, and upon receiving a wave reflected by an object of the transmission wave, outputs an output signal based on the transmission wave and the reflected wave. The object detection unit detects movement of the object in a second direction intersecting with a first direction, which is the transmission direction of the radio waves, based on the plurality of output signals output from the radio wave sensor at the plurality of detection times. The operation information acquisition unit acquires operation information for an operation target based on the movement of the object in the second direction.

[0006] A control system according to an aspect of the present disclosure includes the moving object detection system and a load control unit, wherein the operation target is a load, and the load control unit controls the load based on the operation information acquired by the operation information acquisition unit.

[0007] The wiring device according to one aspect of the present disclosure includes the motion detection system, a load control unit, and a housing. The operation target is a load. The load control unit controls the load based on the operation information acquired by the operation information acquisition unit. The housing accommodates the motion detection system and the load control unit and is mountable to a construction surface.

[0008] A load system according to an aspect of the present disclosure includes the control system and the load, wherein the load control unit controls the load based on the operation information acquired by the operation information acquisition unit.

[0009] FIG. 1 is a schematic block diagram of a control system, a wiring device, and a load system including a motion detection system according to an embodiment of the present disclosure. FIG. 2 is a conceptual diagram of a room to which the wiring device including the motion detection system is applied. FIG. 3 is a graph showing changes in the frequency of transmitted waves and received waves transmitted by a radio wave sensor included in the motion detection system. FIG. 4 is a diagram conceptually explaining inter-frame differentiation performed by the motion detection system. FIG. 5 is a frequency spectrum diagram showing an example of an FFT result calculated by the motion detection system for frame Fr0. FIG. 6 is a frequency spectrum diagram showing an example of an FFT result calculated by the motion detection system for frame Fr1. FIG. 7 is a frequency spectrum diagram showing an example of a difference calculated by the motion detection system from the FFT result for frame Fr0 and the FFT result for frame Fr1. FIG. 8 is a distribution diagram showing a distribution of points representing a motion detected by the motion detection system. FIG. 9 is a diagram conceptually explaining inter-frame differentiation performed by the motion detection system. Fig. 10 is a front view showing an installed state of a wiring fixture including the motion detection system of the same. Fig. 11 is a plan view showing a detection area of ​​the same. Fig. 12A is a plan view showing a detection area of ​​the same. Fig. 12B is a diagram in which a plurality of points of an object whose motion has been detected by the same motion detection system are plotted on an XY plane. Fig. 13A is a plan view showing a detection area of ​​the same. Fig. 13B is a diagram in which a plurality of points of an object whose motion has been detected by the same motion detection system are plotted on an XY plane. Fig. 14A is a plan view showing a detection area of ​​the same motion detection system. Fig. 14B is a diagram in which a plurality of points of an object whose motion has been detected by the same motion detection system are plotted on an XY plane. Fig. 15A is a plan view showing a detection area of ​​the same motion detection system. Fig. 15B is a diagram in which a plurality of points of an object whose motion has been detected by the same motion detection system are plotted on an XY plane. Fig. 16 is a front view showing an interface screen of a communication terminal capable of communicating with the control system of the same. Fig. 17 is a flowchart explaining the operation of the control system of the same. Fig. 18 is a conceptual diagram of a room to which a wiring fixture equipped with a moving object detection system of a modified example is applied.

[0010] Hereinafter, a moving object detection system, a control system, a wiring device, and a load system according to embodiments will be described in detail with reference to the drawings. However, each diagram described in the following embodiments is a schematic diagram, and the dimensional ratios of the sizes of the components do not necessarily reflect the actual dimensional ratios. Furthermore, the configurations described in the following embodiments are merely examples of the present disclosure. The present disclosure is not limited to the following embodiments, and various modifications are possible depending on the design, etc., as long as the effects of the present disclosure can be achieved.

[0011] (Embodiment) (1) Overview As shown in FIG. 1, a moving object detection system 1 according to this embodiment includes a radio wave sensor 10, an object detection unit 22, and an operation information acquisition unit 23.

[0012] The radio wave sensor 10 transmits a frequency-modulated transmission wave into real space at each of a plurality of detection times. When the radio wave sensor 10 receives a wave of the transmission wave reflected by an object, it outputs an output signal based on the transmission wave and the reflected wave.

[0013] The object detection unit 22 detects the movement of an object in a second direction intersecting with a first direction, which is the transmission direction of radio waves, based on a plurality of output signals output from the radio wave sensor 10 at a plurality of detection points in time.

[0014] The operation information acquisition unit 23 acquires operation information for the operation target based on the movement of the object in the second direction.

[0015] The moving object detection system 1 of this embodiment is capable of detecting a moving object (hereinafter, sometimes referred to as a "moving object"). In this embodiment, the detection target of the moving object detection system 1 is an object that can perform an operation on an operation target by moving a part of the object, such as a person. Note that the object detected by the moving object detection system 1 is not limited to a person, but may also be an animal, a robotic hand, or the like. The operation performed by a person on an operation target may be, for example, a gesture operation that indicates the operation content by moving a part or the whole of the body, a non-contact operation that brings a part of the body close to the operation surface, or a touch operation that touches the operation surface with a part of the body. Note that the touch operation may be a tap operation in which a part of the body is brought into contact with a predetermined part of the operation surface and then released, a double-tap operation that repeats a tap operation twice, a swipe operation in which a part of the body is brought into contact with the operation surface and then moved so as to move the contact position, or the like.

[0016] The moving object detection system 1 is installed, for example, in a room 400 (see FIG. 2 ) in which a person 300 to be detected may be present. A desk 312, which is a stationary object, is installed inside the room 400. The room 400 also contains objects that may move, such as a door 402 and a curtain 404 hanging on the inside of a window 403.

[0017] The moving object detection system 1 includes a housing 2 that houses a radio wave sensor 10, an object detection unit 22, an operation information acquisition unit 23, and the like. The housing 2 of the moving object detection system 1 is installed, for example, on a wall 406 of a room 400. When the housing 2 of the moving object detection system 1 is installed on the wall 406, the transmission direction in which the radio wave sensor 10 transmits radio waves, i.e., the first direction, is a direction along the normal direction of the wall 406 (a direction along the Y-axis direction in FIGS. 2 and 11 ). Note that the transmission direction in which the radio wave sensor 10 transmits radio waves refers to the direction in which the radio waves transmitted by the radio wave sensor 10 propagate. Furthermore, the second direction intersecting with the first direction is a direction perpendicular to the normal direction of the wall 406. Note that the direction perpendicular to the normal direction of the wall 406 is not limited to a direction intersecting the normal direction of the wall 406 at a right angle, but may be, for example, a direction intersecting the normal direction of the wall 406 at an angle between 70 degrees and 110 degrees. The second direction is, for example, a direction along the X-axis direction, but may also be a direction along the Z-axis direction, or may be a direction along any direction perpendicular to the Y-axis direction.

[0018] The object detection unit 22 of the moving object detection system 1 can detect the movement of an object in a second direction based on the output signal of the radio wave sensor 10. Here, when a person 300 present in the detection area A1 of the radio wave sensor 10 performs a gesture operation, such as moving a part of their body in the second direction, to operate an operation target, the body movement in the second direction is detected by the object detection unit 22. Therefore, the operation information acquisition unit 23 can acquire operation information for the operation target based on the object movement in the second direction detected by the object detection unit 22. The moving object detection system 1 may control the operation target based on the operation information acquired by the operation information acquisition unit 23, or may output the operation information acquired by the operation information acquisition unit 23 to a control unit that controls the operation target. The operation target may be the moving object detection system 1 itself or an external load 3.

[0019] (2) Details The moving object detection system 1 of this embodiment can detect the movement of a moving object using the radio wave sensor 10.

[0020] The moving object detection system 1 is included in a wiring device 100 that is installed on a construction surface such as the surface of a wall 406. In other words, the wiring device 100 includes the moving object detection system 1, a load control unit 24, and a housing 2 (see FIG. 10 ). The operation target is a load 3, and the load control unit 24 controls the load 3 based on operation information acquired by an operation information acquisition unit 23. The housing 2 accommodates the moving object detection system 1 and the load control unit 24 and is attachable to a construction surface (the surface of the wall 406 in this embodiment). The housing 2 is a molded product made of, for example, synthetic resin, and is formed in, for example, a disk shape, although the shape and dimensions of the housing 2 can be changed as appropriate.

[0021] Here, the control system is made up of the moving object detection system 1 and the load control unit 24. In other words, the control system includes the moving object detection system 1 and the load control unit 24. The operation target is the load 3, and the load control unit 24 controls the load 3 based on the operation information acquired by the operation information acquisition unit 23.

[0022] The control system and the load 3 constitute a load system 200. In other words, the load system 200 includes the control system and the load 3, and the load control unit 24 controls the load 3 based on the operation information acquired by the operation information acquisition unit 23.

[0023] (2.1) Configuration The configurations of the moving object detection system 1 and the wiring device 100 will be described in more detail below with reference to the drawings.

[0024] (2.1.1) Moving object detection system The moving object detection system 1 includes the above-described radio wave sensor 10, a processing unit 20, and a storage unit 30. The moving object detection system 1 also includes an operation unit 42 and a communication unit 43.

[0025] The radio wave sensor 10 transmits a transmission wave Tr (see Figure 3), which is a frequency-modulated radio wave, from a transmitting antenna, receives a reception wave (reflected wave) Re (see Figure 3), which is the transmission wave Tr reflected by an object, at a receiving antenna, and outputs an intermediate frequency signal (IF signal) obtained by mixing the transmission wave Tr and the reception wave Re.

[0026] The radio wave sensor 10 includes an oscillator 11, a transmitter 12, a receiver 13, and a mixer 14.

[0027] The oscillator 11 periodically generates a transmission signal modulated by, for example, a frequency modulated continuous wave (FMCW) method. Specifically, the oscillator 11 periodically generates a transmission signal modulated in frequency so that the frequency continuously increases from f0 to f1 over a predetermined chirp time Tc.

[0028] The transmitter 12 outputs the transmission signal generated by the oscillator 11 to the transmission antenna, causing the transmission antenna to transmit a transmission wave Tr (see FIG. 3). The frequency of the transmission wave Tr increases continuously from f0 to f1 over a predetermined chirp time Tc.

[0029] The receiver 13 receives the received wave Re (see FIG. 3 ) reflected by an object with a receiving antenna, converts the received wave Re into an electrical signal, and outputs the resulting received signal to the mixer 14. The receiver 13 has a function of measuring the signal strength of the received wave Re received by the receiving antenna. The radio wave sensor 10 outputs the measurement result of the signal strength of the received wave Re measured by the receiver 13 to the processing unit 20.

[0030] The mixer 14 generates an intermediate frequency signal (IF signal) by mixing the transmission signal generated by the oscillator 11 with the reception signal output by the receiver 13. The IF signal is generated during the period when the transmission wave Tr is being transmitted and the reception wave Re is being received (i.e., the period from the start of reception of the reception wave Re to the end of transmission of the transmission wave Tr). The IF signal is a signal that indicates the frequency difference Δf (see FIG. 3 ) between the transmission wave Tr and the reception wave Re. The IF signal is a signal that indicates the difference between the frequency of the transmission wave Tr and the frequency of the reception wave Re at time t, and when the object that reflected the transmission wave Tr is stationary, the IF signal has a constant value.

[0031] Generally, to identify the three-dimensional position of a detection target object (moving object), the radio wave sensor 10 needs to include, for example, one transmitting antenna and three or more receiving antennas. In this embodiment, the radio wave sensor 10 includes one transmitting antenna and three receiving antennas. When the radio wave sensor 10 includes three receiving antennas, an IF signal is generated by mixing the transmitting signal generated by the oscillator 11 with the receiving signal at each of the three receiving antennas. Therefore, the radio wave sensor 10 outputs three IF signals corresponding to the three receiving antennas each time it performs a transmission / reception operation. Note that the positions of the one transmitting antenna and three receiving antennas included in the radio wave sensor 10 are known, and the position information for the one transmitting antenna and the three receiving antennas is pre-stored in the storage unit 30. When the radio wave sensor 10 includes multiple antennas, the multiple antennas may be housed in a single housing 2 or may be located in multiple locations.

[0032] The processing unit 20 is mainly composed of a computer system having one or more processors and a memory. The functions of the processing unit 20 are realized by the processor of the computer system executing a program recorded in the memory of the computer system. The program may be recorded in the memory, or may be provided via a telecommunications line such as the Internet, or may be recorded on a non-transitory recording medium such as a memory card and provided.

[0033] The processing unit 20 has the functions of the object detection unit 22 and the operation information acquisition unit 23 described above. In this embodiment, the processing unit 20 further has the functions of an acquisition unit 21, a load control unit 24, and a setting unit 25. Note that the acquisition unit 21, the object detection unit 22, the operation information acquisition unit 23, the load control unit 24, and the setting unit 25 merely indicate functions realized by the processing unit 20, and do not necessarily indicate actual configurations.

[0034] The operation unit 42 is, for example, a push button switch, a slide switch, a DIP switch, or the like, provided on the side of the housing 2. The operation unit 42 is provided on the housing 2 in a state operable by a user. The operations received by the operation unit 42 are mechanical operations. The operation unit 42 is used, for example, to directly operate the load 3. The operation unit 42 is also used, for example, to make settings related to the control of the load 3. The settings related to the control of the load 3 include, for example, setting the attributes of the load 3 (such as the type and model number of the load 3) and / or setting the control mode of the load 3. Setting the attributes of the load 3 means, for example, setting at least one of the type and model number of the load 3. Types of the load 3 include, for example, lighting loads, air conditioners, ventilation fans, televisions, etc. The model number of the load 3 is, for example, an identification number assigned to the type of the load 3 by the manufacturer of the load 3, etc. Setting the control mode of the load means making settings related to the control method of the load 3. The control method for the load 3 includes, for example, a touch control method for controlling the load 3 in accordance with a touch operation detected by the motion detection system 1, a gesture control method for controlling the load 3 in accordance with a gesture operation detected by the motion detection system 1, and a motion detection control method for controlling the load 3 based on the result of detection of the presence or absence of a moving object by the motion detection system 1. Furthermore, when the load 3 is a lighting load, the control method for the load 3 includes a control method for controlling the on / off of the lighting load in accordance with the detection result of the motion detection system 1, and a control method for controlling the brightness of the lighting load in accordance with the detection result of the motion detection system 1. Furthermore, when there are multiple loads 3 to be operated, the control method for the load 3 may include a scene control method for collectively controlling the multiple loads 3 in a preset control state.

[0035] When the user inputs operation information for operating the load 3 using the operation unit 42, the operation information is output from the operation unit 42 to the load control unit 24. Furthermore, when the user inputs setting information related to the control of the load 3 using the operation unit 42, the setting information is output from the operation unit 42 to the setting unit 25.

[0036] The communication unit 43 is configured to be able to communicate with a communication terminal 80, which is an external system. The communication terminal 80 has a communication function that enables communication with the moving object detection system 1. The communication terminal 80 is, for example, a smartphone with a wireless communication function, but may also be a tablet computer, a wearable computer, or the like.

[0037] The communication terminal 80 is capable of executing software for operating the load 3 and making settings related to the control of the load 3. When a user inputs operation information for operating the load 3 using the communication terminal 80, the operation information is transmitted from the communication terminal 80 to the communication unit 43. When the communication unit 43 receives the operation information from the communication terminal 80, it outputs the operation information to the load control unit 24. Furthermore, when a user inputs setting information related to the control of the load 3 using the communication terminal 80, the setting information is transmitted from the communication terminal 80 to the communication unit 43. When the communication unit 43 receives the setting information from the communication terminal 80, it outputs the setting information to the setting unit 25. FIG. 16 shows an example of a setting screen for setting a control method displayed on a user interface screen 81 of the communication terminal 80. Three selection buttons BT1 to BT3 are displayed on this user interface screen 81. The selection button BT1 is a selection button for selecting the touch control method. The selection button BT2 is a selection button for selecting the gesture control method. The selection button BT3 is a selection button for selecting the moving object detection control method. When person 300 operates any of the selection buttons BT1 to BT3 displayed on the user interface screen 81, setting information for setting the control method corresponding to the operated selection button (any of the selection buttons BT1 to BT3) is sent to the communication unit 43, so that person 300 can set the desired control method.

[0038] The external system is a communication terminal 80 such as a smartphone, a tablet computer, or a wearable computer, but may also be a control device or the like that is capable of communicating with the communication unit 43. The communication method between the communication unit 43 and the communication terminal 80 is a wireless communication method such as Wi-Fi (registered trademark) or Bluetooth (registered trademark), but may also be a wired communication method, and can be changed as appropriate.

[0039] The setting unit 25 sets at least one of the attribute of the load 3 and the control mode of the load 3. Here, the setting unit 25 can set at least one of the attribute of the load 3 and the control mode of the load 3 based on at least one of the setting information input by operating the operation unit 42 and the setting information received by the communication unit 43 from an external system (communication terminal 80). Note that in this embodiment, a case will be described in which the attribute of the load 3 is set to a lighting load and the control mode of the load 3 is set to a gesture operation.

[0040] The storage unit 30 includes, for example, memories such as RAM (Random Access Memory), ROM (Read-Only Memory), and EEPROM (Electrically Erasable Programmable Read-Only Memory). The storage unit 30 stores, for example, programs executed by the processing unit 20. The storage unit 30 also stores the results of calculations by the processing unit 20, etc.

[0041] The acquisition unit 21 acquires an output signal from the radio wave sensor 10. In this embodiment, the acquisition unit 21 acquires an IF signal as an output signal from the radio wave sensor 10. Since the radio wave sensor 10 is equipped with three receiving antennas, the acquisition unit 21 acquires three IF signals corresponding to the three receiving antennas from the radio wave sensor 10 each time the radio wave sensor 10 performs a transmission / reception operation. Furthermore, the acquisition unit 21 acquires measurement results of the signal strength of the received waves Re received by each of the three receiving antennas from the radio wave sensor 10 each time the radio wave sensor 10 performs a transmission / reception operation.

[0042] The object detection unit 22 obtains a frequency spectrum by performing FFT (Fast Fourier Transform) processing on the IF signal acquired by the acquisition unit 21 from the radio wave sensor 10, and acquires the frequency spectrum as an FFT result. In this embodiment, since the radio wave sensor 10 has three receiving antennas, the mixer 14 outputs three IF signals between the transmission wave Tr and three reception waves Re received by the three receiving antennas. Therefore, each time the radio wave sensor 10 performs a transmission / reception operation, the object detection unit 22 calculates a group of FFT results including three FFT results (frequency spectra) obtained by performing FFT processing on each of the three IF signals, and stores the calculated group of FFT results in the storage unit 30. Here, the group of FFT results obtained in one transmission / reception operation of the transmission wave Tr and the reception wave Re includes three FFT results (frequency spectra) obtained by performing FFT processing on each of the three IF signals corresponding to the three receiving antennas.

[0043] The radio wave sensor 10 repeats transmission and reception operations at a predetermined cycle T. The predetermined cycle T is, for example, 200 mS. The radio wave sensor 10 performs transmission and reception operations once per frame Fr, with one frame Fr being 200 mS (see FIG. 4). Note that the duration of one frame Fr is not limited to 200 mS and can be changed as appropriate.

[0044] Here, the process by which the object detection unit 22 determines the position of a moving object based on two output signals output from the radio wave sensor 10 in two frames FrA and FrB (in other words, two detection points) will be explained with reference to Figures 4 to 7.

[0045] FIG. 4 shows the transmission wave Tr transmitted by the transmitter 12 in frames FrA and FrB. FIGS. 5 and 6 show the FFT results (relationship between frequency f and signal strength amp of the reception wave Re) obtained by FFT processing of the IF signal generated by mixing the transmission signal with the reception signal received by one of the three reception antennas. Note that FIG. 5 shows the FFT result for frame FrA, and FIG. 6 shows the FFT result for frame FrB. Here, multiple peaks appearing in the FFT result (frequency spectrum) correspond to objects that reflect the transmission wave Tr. The object detection unit 22 then calculates the time difference between the frequency spectrum for frame FrA and the frequency spectrum for frame FrB to remove frequency components corresponding to stationary objects and obtain only frequency components corresponding to moving objects. FIG. 7 shows the time difference between the frequency spectrum for frame FrA and the frequency spectrum for frame FrB. The peaks in the frequency spectrum shown in FIG. 7 correspond to moving objects.

[0046] Here, the object detection unit 22 outputs three IF signals between the transmitted wave Tr and the three received waves Re received by the three receiving antennas each time the radio wave sensor 10 performs a single transmission / reception operation, and obtains three frequency spectra by performing FFT processing on each of the three IF signals.The object detection unit 22 then obtains the time differences of the three frequency spectra between frames, thereby determining the distances from the three receiving antennas to the moving object, and can determine the three-dimensional position of the moving object using three-point positioning.

[0047] In the present embodiment, the object detection unit 22 designates one of the three or more output signals output from the radio wave sensor 10 at each of the three or more detection time points as a reference output signal, and the other output signals are designated as multiple comparison signals. The object detection unit 22 then determines the distance between the object and the radio wave sensor 10 based on a time difference calculated between each of the multiple comparison signals and the reference output signal. Here, the "time difference" may be the difference between each of the multiple comparison signals and the reference output signal, or the difference between a calculated value calculated from each of the multiple comparison signals and a calculated value calculated from the reference output signal. In this modified example, the latter is used, and the object detection unit 22 calculates the difference (time difference) between a calculated value (e.g., frequency spectrum) calculated from each of the multiple comparison signals and a calculated value (e.g., frequency spectrum) calculated from the reference output signal for each of the multiple comparison signals.

[0048] The object detection unit 22 detects the position and displacement of an object based on, for example, four pieces of time difference information calculated from five output signals output from the radio wave sensor 10 at each of five detection times.

[0049] As shown in FIG. 9 , the object detection unit 22 defines five consecutive frames Fr0 to Fr4 as one measurement period DF1, performs FFT processing on the three IF signals output from the radio wave sensor 10 for each of the five frames Fr0 to Fr4, and calculates three frequency spectra. The calculation results are stored in the storage unit 30. The object detection unit 22 then defines the output signal (IF signal) from the radio wave sensor 10 for the earliest frame Fr0 of the five frames Fr0 to Fr4 as a reference output signal, and the output signals (IF signals) from the radio wave sensor 10 for each of the remaining four frames Fr1 to Fr4 as comparison signals. The object detection unit 22 then determines the time difference between the frequency spectrum calculated from the reference output signal and the frequency spectrum calculated from the comparison signal for each of the multiple comparison signals for frames Fr1 to Fr4.

[0050] Specifically, the object detection unit 22 obtains a frequency spectrum in frame Fr1 for each of three IF signals corresponding to three receiving antennas, calculates a time difference D1 between the frequency spectrum obtained in frame Fr0 and the frequency spectrum obtained in frame Fr1, and determines the three-dimensional position of the object based on the time difference D1. Furthermore, the object detection unit 22 obtains a frequency spectrum in frame Fr2 for each of three IF signals corresponding to three receiving antennas, calculates a time difference D2 between the frequency spectrum obtained in frame Fr0 and the frequency spectrum obtained in frame Fr2, and determines the three-dimensional position of the object based on the time difference D2. Furthermore, the object detection unit 22 obtains a frequency spectrum in frame Fr3 for each of three IF signals corresponding to three receiving antennas, calculates a time difference D3 between the frequency spectrum obtained in frame Fr0 and the frequency spectrum obtained in frame Fr3, and determines the three-dimensional position of the object based on the time difference D3. Furthermore, the object detection unit 22 obtains the frequency spectrum in frame Fr4 for each of the three IF signals corresponding to the three receiving antennas, calculates a time difference D4 between the frequency spectrum obtained in frame Fr0 and the frequency spectrum obtained in frame Fr4, and determines the three-dimensional position of the object based on the time difference D4.

[0051] In this way, the object detection unit 22 calculates the three-dimensional position of each object based on the four time differences D1 to D4, which are calculated using different time intervals. Of the four time differences D1 to D4, the time interval for calculating the time difference D1 is the shortest, and the time interval for calculating the time difference D4 is four times longer than the time interval for calculating the time difference D1. Therefore, there is an advantage in that a moving object with small movements can be detected from the time difference D1 between frames Fr0 and Fr1, and a moving object with large movements can be detected from the time difference D4 between frames Fr0 and Fr4. Here, by adjusting the time intervals of the four time differences D1 to D4, for example, body movements of the person 300 caused by breathing can be detected from the time differences D1 and D2, and body movements of the person 300 caused by moving their arms or legs or turning over in bed can be detected from the time differences D3 and D4.

[0052] Furthermore, in this embodiment, for each of frames Fr1 to Fr4 within measurement period DF1, object detection unit 22 calculates only the time difference between the frequency spectrum calculated for that frame and the frequency spectrum calculated for frame Fr0. Therefore, compared to when object detection unit 22 calculates, for each frame Fr, the time difference between the frequency spectrum calculated for that frame Fr and four frequency spectra calculated for each of the previous four frames Fr, the amount of processing performed by object detection unit 22 for each frame Fr can be reduced, and there is also the advantage that processing unit 20 of moving object detection system 1 can be implemented using a low-spec computer system.

[0053] When a person 300 is present in the real space SP1, the transmission wave Tr from the transmitter 12 is reflected by multiple reflecting parts of the person 300's body. In this case, the receiver 13 receives multiple received waves Re reflected by multiple parts of the person 300's body, and the object detection unit 22 performs three-point positioning of the multiple parts that reflect the transmission wave Tr. The person 300 is detected as a collection of multiple reflecting parts that reflect the transmission wave Tr. FIG. 8 is a diagram in which points DT1 representing multiple reflecting parts that reflect the transmission wave Tr are plotted on a three-dimensional space 500 representing the room 400 when the object detection unit 22 detects a person 300 walking in the real space SP1. When the radio wave sensor 10 is installed on the ceiling 401, the transmission wave Tr is largely reflected by the person 300's head, shoulders, hands, and feet, and is less likely to be reflected by the person 300's torso. Therefore, a plurality of points DT1 representing a plurality of reflection parts of the person 300 that reflect the transmission wave Tr, such as the head, shoulders, hands, and feet, are plotted in the three-dimensional space 500.

[0054] Here, the object detection unit 22 performs a clustering process on the points DT1 corresponding to the respective reflection sites, thereby grouping the points DT1 into one or more clusters. In the example of Fig. 8 , the points DT1 representing the reflection sites are grouped into two groups: a cluster CL1 corresponding to the head, shoulders, hands, etc. of the person 300, and a cluster CL2 corresponding to the feet of the person 300. As shown in Fig. 8 , when the points DT1 corresponding to the person 300 are grouped into two clusters CL1 and CL2, the object detection unit 22, for example, determines the position of the center of gravity of each of the clusters CL1 and CL2 and determines the midpoint between the two center of gravity positions to determine the position of the person 300, and stores the position calculation results in the storage unit 30. Furthermore, the object detection unit 22 detects an area surrounded by, for example, an envelope around a plurality of points DT1 belonging to cluster CL1 as a presence range G1 in which body parts corresponding to cluster CL1 exist, and detects an area surrounded by, for example, an envelope around a plurality of points DT1 belonging to cluster CL2 as a presence range G1 in which body parts corresponding to cluster CL2 exist. Then, the object detection unit 22 detects the combined range of the presence range G1 of cluster CL1 and the presence range G1 of cluster CL2 as the presence range G1 of the person 300. Furthermore, the object detection unit 22 detects the movement of the body part corresponding to cluster CL1 based on the history of the center of gravity position of cluster CL1, and detects the movement of the body part corresponding to cluster CL2 based on the history of the center of gravity position of cluster CL2.

[0055] In this way, when the multiple points DT1 representing the person 300 are grouped into multiple clusters, the object detection unit 22 determines the existence range G1 and center of gravity position of each of the multiple clusters, and stores the existence range G1 and center of gravity position of each of the multiple clusters in the storage unit 30. Then, the object detection unit 22 detects the range combining the existence ranges G1 of the multiple clusters as the existence range G1 of the person 300. Furthermore, the object detection unit 22 detects the movement of the body parts corresponding to each of the multiple clusters based on the history of the center of gravity positions of the multiple clusters.

[0056] When multiple points DT1 representing the person 300 are detected as one cluster, the object detection unit 22 detects the existence range G1 and center of gravity position of the cluster, and stores the existence range G1 and center of gravity position of the cluster in the storage unit 30. Then, the object detection unit 22 detects the existence range G1 of the cluster as the existence range G1 of the person 300, and detects the movement of the person 300 based on the history of the center of gravity position of the cluster.

[0057] In this way, the object detection unit 22 further detects the range G1 in which the moving object exists, based on the plurality of output signals output from the radio wave sensor 10 at the plurality of detection points in time.

[0058] The operation information acquisition unit 23 acquires operation information for the operation target based on the movement of the object (for example, the person 300 ) in the second direction among the movements of the object (for example, the person 300 ) detected by the object detection unit 22 .

[0059] Here, the operation target is, for example, a load 3 such as a lighting load. Actions for operating the lighting load, which is the load 3, are predetermined, and the relationship between the actions and operation information is stored in the storage unit 30. For example, an action for turning on the lighting load is an action of moving a hand extended toward the wiring apparatus 100 to the right. An action for turning off the lighting load is an action of moving a hand extended toward the wiring apparatus 100 to the left. Note that, if the load control unit 24 has a dimming function for dimming the lighting load, an operation for increasing the dimming level of the lighting load is an action of moving a hand extended toward the wiring apparatus 100 upward, and an operation for decreasing the dimming level of the lighting load is an action of moving a hand extended toward the wiring apparatus 100 downward. Note that the actions performed by a person to operate the operation target are not limited to these actions and can be changed as appropriate.

[0060] Furthermore, an operation detection area in which the moving object detection system 1 detects an operation for operating the lighting load, which is the load 3, is set in advance. The operation detection area is a partial area of ​​the detection area A1, and an operation performed in an area of ​​the detection area A1 other than the operation detection area is not detected as an operation for operating the lighting load, which is the load 3. FIG. 11 shows an example of the operation detection area. The operation detection area includes a first operation detection area DA1 and a second operation detection area DA2. The first operation detection area DA1 is an area whose dimension in the X-axis direction is approximately the same as that of the housing 2 and whose distance from the housing 2 in the Y-axis direction is less than a first distance L1. The movement of the person 300 detected in the first operation detection area DA1 is detected as a touch operation in which the person 300 touches the housing 2. The second operation detection area DA2 is an area whose dimension in the X-axis direction is wider than that of the first operation detection area DA1 and whose distance from the housing 2 in the Y-axis direction is equal to or greater than the first distance L1 but less than a second distance L2. The movement of the person 300 detected in the second operation detection area DA2 is detected as a gesture operation performed by the person 300 without touching the housing. Note that the first distance L1 is preferably a distance of, for example, several centimeters so that a touch operation can be detected separately from a gesture operation. The second distance L2 is preferably a distance of, for example, 50 cm or more and 1.5 m or less so as to avoid erroneously detecting a moving object other than the person 300 performing the gesture operation.

[0061] In this way, the operation information acquisition unit 23 determines whether the movement is a touch operation or a gesture operation based on the existence range G1 of the moving object, and acquires the operation information based on the existence range G1 of the object and the movement of the object in the second direction. In other words, the operation information acquisition unit 23 acquires the operation information from the movement of the object taking into account the existence range G1 in which the object exists, and therefore can acquire the operation information more accurately.

[0062] Here, the process by which the object detection unit 22 acquires operation information based on the object's existence range G1 and the object's movement in the second direction when a person 300 present in the operation detection area performs an action to turn on the lighting load will be explained with reference to Figures 12A to 14B.

[0063] 12A is a top view of a person 300 in the second operation detection area DA2 with his or her hands down, and FIG. 12B shows a diagram in which multiple points DT1 detected by the object detection unit 22 in this state are plotted on the XY plane. In this state, the object detection unit 22 detects the person 300 as a single cluster B1. If the amount of change in the position of the cluster B1 detected in the second operation detection area DA2 is equal to or less than a predetermined threshold, the operation information acquisition unit 23 determines that the person 300 is standing in the second operation detection area DA2 and stores the center of gravity of the cluster B1 in the storage unit 30 as the position of the person 300.

[0064] 13A is a top view of a person 300 in the second operation detection area DA2 with his or her hand thrust forward, and FIG. 13B shows a diagram in which a plurality of points DT1 detected by the object detection unit 22 in this state are plotted on the XY plane. In this state, the object detection unit 22 detects a cluster B11 corresponding to the torso 301 of the person 300 and a cluster B12 corresponding to the hand 302. Here, because the cluster B11 corresponding to the torso 301 is larger than the cluster B12 corresponding to the hand 302, the cluster B11 corresponding to the torso 301 becomes the first part, and the cluster B12 corresponding to the hand 302 becomes the second part. In other words, the operation information acquisition unit 23 compares the sizes of the clusters B11 and B12 to determine that the cluster B12, which is smaller than the cluster B11, is a part of the body (the hand 302 in this example). When the object presence range G1 includes a first portion (cluster B11) and a second portion (cluster B12) smaller than the first portion, the object detection unit 22 detects the positions of the first portion and the second portion. Here, when the center of gravity of cluster B12, which is the second portion, is away from the position of person 300 stored in the storage unit 30 by a certain distance or more and is included in the second operation detection area DA2, the operation information acquisition unit 23 determines that cluster B12 is the hand 302 of person 300 and determines that the hand 302 of person 300 is in a state of being extended toward the wiring device 100. Furthermore, the operation information acquisition unit 23 recognizes the center of gravity of cluster B12 as the position of hand 302 of person 300.

[0065] 14A is a top view of a state in which a person 300 present in the second operation detection area DA2 of the wiring device 100 moves his / her hand 302 to the right, and FIG. 14B shows a diagram in which multiple points DT1 detected by the object detection unit 22 in this state are plotted on the XY plane. The operation information acquisition unit 23, for example, determines that, among the multiple points DT1 belonging to cluster B12, point DT1 with the largest amount of movement is a representative point of cluster B12, and detects the movement of this representative point as the movement of the person 300's hand 302. Then, based on the movement of this representative point, the operation information acquisition unit 23 determines that the person 300 has performed an operation of moving his / her hand 302 to the right. That is, the operation information acquisition unit 23 acquires operation information for the operation target based on the movement of the second portion (cluster B12) in the second direction.

[0066] In this way, the operation information acquisition unit 23 can detect that the person 300 has performed an action of moving the hand 302 to the right based on the change in the position of the second portion (cluster B12) detected by the object detection unit 22, and acquires operation information to turn on the lighting load based on this action. Note that even if the person 300 has performed an action of moving the hand to the left, the operation information acquisition unit 23 can detect that the person 300 has performed an action of moving the hand to the left based on the change in the position of the second portion (cluster B12), and acquires operation information to turn off the lighting load based on this action.

[0067] The operation information acquisition unit 23 acquires operation information by detecting the movement of an object in the second direction (movement of a part of the body of the person 300 ), and outputs the acquired operation information to the load control unit 24 .

[0068] The load control unit 24 executes control processing on the load 3 based on the operation information acquired by the operation information acquisition unit 23. For example, when operation information to turn on the lighting load is input from the operation information acquisition unit 23 to the load control unit 24, the load control unit 24 controls the lighting load to be turned on based on this operation information. Note that when operation information is input from the operation unit 42 or the communication unit 43, the load control unit 24 prioritizes the operation information from the operation unit 42 or the communication unit 43 over operation information acquired from the movement of an object, and controls the lighting load, which is the load 3, based on this operation information. Therefore, the person 300 can operate the lighting load in a desired state by directly operating the operation unit 42 or the communication terminal 80.

[0069] As described above, the moving object detection system 1 includes an operation unit 42 that outputs an operation signal in response to a user operation, and a communication unit 43 that receives an operation signal transmitted from an external system (communication terminal 80). Therefore, the operation information acquisition unit 23 can acquire operation information based on an operation signal acquired from at least one of the operation unit 42 and the communication unit 43. It is not essential that the moving object detection system 1 include both the operation unit 42 and the communication unit 43; it is sufficient if the moving object detection system 1 includes at least one of the operation unit 42 and the communication unit 43.

[0070] The object detection unit 22 can also detect movement of the second portion, cluster B12, in the first direction. For example, when the control method of the load 3 is set to the touch control method, the operation information acquisition unit 23 can acquire operation information for the operation target (load 3) based on movement of the second portion (cluster B12) in the first direction. When the person 300 brings their hand 302 closer to the housing 2 to perform a touch operation, the object detection unit 22 detects the movement of the second portion, cluster B12, in the first direction, and the operation information acquisition unit 23 can acquire operation information for the operation target based on this movement. In this way, the operation information acquisition unit 23 can acquire operation information for the operation target based on at least one of the movement of the second portion in the first direction and the movement of the second portion in the second direction, which has the advantage of improving operability.

[0071] In addition, when the setting unit 25 sets the load control method to the moving object detection control method based on the setting information input from the operation unit 42 or the communication unit 43, the load control unit 24 controls the lighting load, which is load 3, to turn on when the object detection unit 22 detects the presence of a moving object.

[0072] FIG. 15A is a diagram showing a state in which a person 300 present in the detection area A1 of the wiring device 100 is crossing the detection area A1 as viewed from above, and FIG. 15B shows a diagram in which multiple points DT1 detected by the object detection unit 22 in this state are plotted on the XY plane.

[0073] When the control method of the load control unit 24 is set to the moving object detection control method, if the object detection unit 22 detects an object (e.g., person 300) moving within the detection area A1, the load control unit 24 controls to turn on the lighting load, which is load 3. Thereafter, if the person 300 leaves the detection area A1 and the object detection unit 22 no longer detects an object (e.g., person 300) moving within the detection area A1, the load control unit 24 controls to turn off the lighting load after a predetermined lighting retention time has elapsed.

[0074] (2.1.2) Wiring Device As described above, the wiring device 100 includes the moving object detection system 1 and the load control unit 24. The wiring device 100 also includes a pair of connection terminals 51, 52, a drive circuit 40, and a switch element 41. In this embodiment, the housing 2 of the moving object detection system 1 accommodates the radio wave sensor 10, the processing unit 20, the storage unit 30, the pair of connection terminals 51, 52, the drive circuit 40, and the switch element 41. That is, in this embodiment, the functions of the moving object detection system 1 and the functions of the wiring device 100 are accommodated in a single housing 2. The wiring device 100 of this embodiment and the load 3 that is the target of control by the load control unit 24 form a load system 200.

[0075] A series circuit of an AC power source AC and a load 3 is connected between the connection terminals 51 and 52 via electric wires W1 and W2. The load 3 is, for example, a lighting load. The lighting load load 3 includes a light source such as an LED (Light Emitting Diode) and a lighting circuit for lighting the light source.

[0076] The switch element 41 is, for example, a semiconductor switching element such as a triac, a thyristor, a field effect transistor (FET), or a bipolar transistor, or a relay. The switch element 41 is connected between a pair of connection terminals 51, 52. That is, a series circuit of an AC power source AC and a load 3 is connected between both ends of the switch element 41. When the switch element 41 is in a conductive state and power is supplied to the load 3, the load 3, which is a lighting load, is turned on. When the switch element 41 is in a non-conductive state and power supply to the load 3 is cut off, the load 3, which is a lighting load, is turned off.

[0077] The drive circuit 40 controls the switch element 41 to a conductive state or a non-conductive state in response to a control signal input from the load control unit 24. When the load control unit 24 outputs a control signal to the drive circuit 40 to turn on the lighting load, the drive circuit 40 controls the switch element 41 to an on state, thereby turning on the lighting load, which is the load 3. When the load control unit 24 outputs a control signal to the drive circuit 40 to turn off the lighting load, the drive circuit 40 controls the switch element 41 to an off state, thereby turning off the lighting load, which is the load 3.

[0078] The load control unit 24 may output a control signal to the drive circuit 40 for phase control of the switch element 41. The drive circuit 40 controls the switch element 41 to be in a conductive state for only a conductive period corresponding to the control signal in each half cycle of the AC voltage input from the AC power supply AC, thereby adjusting the power supplied to the load 3, which is a lighting load, and enabling the lighting load to be dimmed.

[0079] (2.2) Description of Operation The operation of the wiring fixture 100 including the moving object detection system 1 of the above embodiment will be described with reference to FIG. 17 and other figures. Here, it is assumed that the setting unit 25 sets the load 3 to a lighting load and the control method of the load 3 to the gesture control method. Note that the flowchart shown in FIG. 17 merely illustrates one example of the operation of the wiring fixture 100, and the order of processes may be changed as appropriate, and processes may be added or omitted as appropriate.

[0080] The radio wave sensor 10 performs transmission and reception operations at a predetermined cycle, and each time the radio wave sensor 10 performs a transmission and reception operation, the acquisition unit 21 acquires an output signal (IF signal) output from the radio wave sensor 10 (ST1). The acquisition unit 21 acquires the signal strength of the received waves Re received by each of the three receiving antennas from the radio wave sensor 10.

[0081] When the acquisition unit 21 acquires the output signal (IF signal) from the radio wave sensor 10, the object detection unit 22 executes a detection step in which it detects a moving object (ST2). In the detection step, the object detection unit 22 performs FFT processing on the output signal (IF signal) acquired by the acquisition unit 21 from the radio wave sensor 10 for each of the three receiving antennas to acquire an FFT result (frequency spectrum) and stores the FFT result in the storage unit 30. The object detection unit 22 then calculates the time difference between the FFT results at multiple detection points, and if a moving object (moving object) is present based on the calculated time difference, calculates the distance from each of the three receiving antennas to the moving object and calculates the three-dimensional position of the moving object using three-point positioning.

[0082] If no moving object is detected in the detection step ST2 (ST3: No), the processing unit 20 ends the process.

[0083] If a moving object is detected in the detection step ST2 (ST3: Yes), the operation information acquisition unit 23 executes an operation information acquisition step to acquire operation information for the load 3 to be operated based on the movement of the object detected by the object detection unit 22 (ST4).

[0084] If the operation information acquisition section 23 fails to acquire operation information in the detection step ST2 (ST5: No), the processing section 20 ends the process.

[0085] In the detection step ST2, if the operation information acquisition unit 23 acquires operation information (ST5: Yes), the operation information acquisition unit 23 outputs the acquired operation information to the load control unit 24. When the operation information is input from the operation information acquisition unit 23, the load control unit 24 executes a control step for controlling the load 3 based on this operation information (ST6), and therefore, by detecting the movement performed by the person 300, the operating state of the load 3 can be controlled.

[0086] (3) Modifications The above embodiment is merely one of various embodiments of the present disclosure. The above embodiment can be modified in various ways depending on the design, etc., as long as the object of the present disclosure can be achieved.

[0087] Modifications of the above embodiment are listed below. The modifications described below can be applied in appropriate combinations.

[0088] The moving object detection system 1 and the moving object detection method of the present disclosure include a computer system. The computer system is primarily composed of a processor and memory as hardware. The functions of the moving object detection system 1 of the present disclosure are realized by the processor executing a program stored in the memory of the computer system. The program may be pre-recorded in the memory of the computer system, provided via a telecommunications line, or provided in a non-transitory recording medium readable by the computer system, such as a memory card, optical disk, or hard disk drive. The processor of the computer system is composed of one or more electronic circuits including a semiconductor integrated circuit (IC) or a large-scale integrated circuit (LSI). The integrated circuits, such as ICs and LSIs, are referred to by different names depending on the degree of integration, and include integrated circuits called system LSIs, very large-scale integrations (VLSIs), or ultra-large-scale integrations (ULSIs). Furthermore, field-programmable gate arrays (FPGAs), which are programmed after the LSI is manufactured, or logic devices that allow the reconfiguration of internal connections or circuit partitions within the LSI, can also be used as processors. The electronic circuits may be integrated into one chip or distributed across multiple chips. The chips may be integrated into one device or distributed across multiple devices. The computer system referred to here includes a microcontroller having one or more processors and one or more memories. Therefore, the microcontroller is also composed of one or more electronic circuits including a semiconductor integrated circuit or a large-scale integrated circuit.

[0089] Furthermore, it is not essential for the moving object detection system 1 that multiple functions of the moving object detection system 1 are concentrated in one housing 2, and the components of the moving object detection system 1 may be distributed across multiple housings. Similarly, it is not essential for the wiring device 100 that multiple functions of the wiring device 100 are concentrated in one housing 2, and the components of the wiring device 100 may be distributed across multiple housings.

[0090] In the above embodiment, when comparing the magnitude of two values, "greater than or equal to" may be used instead of "greater than." In other words, whether or not the two values ​​are equal when comparing two values ​​can be arbitrarily changed depending on the setting of the reference value, etc., so there is no technical difference between "greater than or equal to" and "greater than." Similarly, "shorter than" may be used instead of "less than or equal to."

[0091] In the above embodiment, the radio wave sensor 10 includes one transmitting antenna and three receiving antennas, but the number of receiving antennas may be two or four or more.

[0092] Furthermore, in the radio wave sensor 10, the antenna used to transmit the transmission wave Tr and the antenna used to receive the reception wave Re may be the same antenna (hereinafter referred to as a "common antenna"), i.e., the transmission wave Tr may be transmitted from the common antenna, and the reception wave Re corresponding to the transmission wave Tr may be received by the common antenna.

[0093] In the above embodiment, one transmission / reception operation is performed in one frame Fr, but multiple transmission / reception operations may be performed in one frame Fr. In this case, the object detection unit 22 may detect the position of an object based on a representative value (e.g., an average value) of the IF signal output from the radio wave sensor 10 in the multiple transmission / reception operations.

[0094] In the above embodiment, the load 3 to be controlled by the load control unit 24 was a lighting load, but the load 3 to be controlled is not limited to a lighting load and may be an air conditioner, a television, a ventilation fan, etc., and can be changed as appropriate.

[0095] In the above embodiment, the operation information acquisition unit 23 acquires operation information based on the movement of the hand 302, but it may also acquire operation information based on the movement of the feet, the movement of the head, etc. Furthermore, the operation information acquisition unit 23 may acquire operation information based on the shape of an object detected by the object detection unit 22, for example, the shape of a part of the body of the person 300. For example, the operation information acquisition unit 23 may acquire operation information based on the shape of the fingers of the hand 302 (hand signs), etc.

[0096] In the above embodiment, the operation information acquisition unit 23 acquires operation information for one operation target, but operation information for multiple operation targets may be acquired. For example, if individual movements are set in advance corresponding to the operations of multiple operation targets, the operation information acquisition unit 23 acquires operation information for the operation target corresponding to the movements based on the movement of the object detected by the object detection unit 22.

[0097] In the above embodiment, the housing 2 of the wiring device 100 including the moving object detection system 1 is attached to the wall 406 of the room 400. However, the housing 2 may also be attached to the ceiling 401 of the room 400 ( FIG. 18 ). In this case, the first direction in which the radio wave sensor 10 transmits radio waves is along the Z-axis direction, and the second direction intersecting with the first direction is a direction perpendicular to the first direction. Note that the direction perpendicular to the first direction is not limited to a direction intersecting the first direction at a right angle (any direction perpendicular to the Z-axis direction) but may be, for example, a direction intersecting the first direction at an angle between 70 degrees and 110 degrees. The operation information acquisition unit 23 can acquire operation information based on the movement of the person 300 in the second direction detected by the object detection unit 22. For example, when the operation information acquisition unit 23 detects a hand movement by the person 300 lying in bed 311, the load control unit 24 turns off or on the lighting load 3, thereby switching the lighting load on or off while the person 300 is lying in bed 311.

[0098] In the above embodiment, the moving object detection system 1 is provided in the wiring device 100, but the moving object detection system 1 may also be provided in the load 3, for example, in a lighting load including a light source and a lighting circuit. That is, the moving object detection system 1 may be housed in the housing of the lighting load, and the lighting circuit may perform on / off control or dimming control of the light source according to the detection result of the moving object detection system 1.

[0099] In addition, in the above embodiment, the moving object detection system 1 and the load control unit 24 that constitute the control system are housed in a single housing, but the moving object detection system 1 and the load control unit 24 may also be housed in separate housings.

[0100] Furthermore, the moving object detection system 1 may be housed in a separate housing, and the moving object detection result may be output to the wiring device 100 or an external device such as a lighting load.

[0101] (Summary) A moving object detection system (1) of a first aspect includes a radio wave sensor (10), an object detection unit (22), and an operation information acquisition unit (23). The radio wave sensor (10) transmits a transmission wave, which is a frequency-modulated radio wave, into real space at each of a plurality of detection times, and upon receiving a wave reflected by an object of the transmission wave, outputs an output signal based on the transmission wave and the reflected wave. The object detection unit (22) detects movement of an object (300) in a second direction intersecting with a first direction, which is the transmission direction of the radio waves, based on a plurality of output signals output from the radio wave sensor (10) at the plurality of detection times. The operation information acquisition unit (23) acquires operation information for an operation target based on the movement of the object (300) in the second direction.

[0102] According to this aspect, the object detection unit (22) can detect the movement (300) of the object in the second direction based on the output signal of the radio wave sensor (10). Therefore, the operation information acquisition unit (23) can acquire operation information for the operation target based on the movement of the object in the second direction detected by the object detection unit (22).

[0103] In the moving object detection system (1) of the second aspect, in the first aspect, the object detection unit (22) further detects the range of existence of the moving object (300) based on a plurality of output signals output from the radio wave sensor (10) at a plurality of detection points in time, and the operation information acquisition unit (23) acquires operation information based on the range of existence of the object (300) and the movement of the object (300) in the second direction.

[0104] According to this aspect, the operation information acquisition unit (23) can determine, based on the range of existence of the object (300), whether or not the object (300) detected by the object detection unit (22) is the object (300) operating the operation target, and can reduce the possibility of erroneously detecting operation information based on the movement of an object unrelated to the operation of the operation target.

[0105] In the third aspect of the moving object detection system (1), in the first or second aspect, when the existence range (G1) includes a first part (B11) and a second part (B12) smaller than the first part (B11), the object detection unit (22) detects the positions of the first part (B11) and the second part (B12), respectively.

[0106] According to this aspect, even when the object detection unit (22) detects a person as a moving object (300) and the range of the person's existence is divided into a first part (B11) and a second part (B12), the operation information acquisition unit (23) can acquire operation information based on the respective positions of the first part (B11) and the second part (B12).

[0107] In the fourth aspect of the moving object detection system (1), in the third aspect, the operation information acquisition unit (23) acquires operation information for the operation target based on the movement of the second part (B12) in the second direction.

[0108] According to this aspect, the operation information acquisition unit (23) can acquire operation information for the operation target based on the movement of the second part (B12), which is a part of the body, in the second direction.

[0109] In the moving object detection system (1) of the fifth aspect, in the fourth aspect, the object detection unit (22) further detects movement of the second part (B12) in a first direction. The operation information acquisition unit (23) acquires operation information for the load (3) based on at least one of the movement of the second part (B12) in the first direction and the movement of the second part (B12) in the second direction.

[0110] According to this aspect, the operation information acquisition unit (23) can acquire operation information based on at least one of the movement of the second part (B12) in the first direction and the movement of the second part (B12) in the second direction, which has the advantage of improving operability.

[0111] The moving object detection system (1) of a sixth aspect is any one of the first to fifth aspects, further comprising at least one of an operation unit (42) that outputs an operation signal in response to a user operation and a communication unit (43) that receives an operation signal transmitted from an external system (80). The operation information acquisition unit (23) is capable of acquiring operation information based on the operation signal acquired from at least one of the operation unit (42) and the communication unit (43).

[0112] According to this aspect, the operation target can be operated based on operation information input from the operation unit (42) or an operation signal transmitted from the external system (80).

[0113] In a seventh aspect of the moving object detection system (1), in any of the first to sixth aspects, the object detection unit (22) sets one of the three or more output signals output from the radio wave sensor (10) at each of the three or more detection time points as a reference output signal, and sets the plurality of output signals other than the reference output signal as a plurality of comparison signals, respectively. The object detection unit (22) determines the movement of the object based on the time difference determined for each of the plurality of comparison signals from the reference output signal.

[0114] According to this aspect, the object detection unit (22) determines the movement of the object based on each of the multiple time differences, and therefore it is possible to detect both objects with small movement and objects with large movement.

[0115] A control system according to an eighth aspect includes the moving object detection system (1) according to any one of the first to seventh aspects and a load control unit (24). The operation target is a load (3). The load control unit (24) controls the load (3) based on operation information acquired by an operation information acquisition unit (23).

[0116] According to this aspect, the load control unit (24) can control the load (3) based on operation information acquired based on the movement of the object (300) in the second direction.

[0117] The control system of a ninth aspect is the eighth aspect, further comprising a setting unit (25) that sets at least one of an attribute of the load (3) and a control mode for the load (3).

[0118] According to this aspect, it is possible to set at least one of the attributes of the load (3) and the control mode for the load (3).

[0119] The control system of a tenth aspect is the control system of the ninth aspect, further including at least one of an operation unit (42) operable by a user and a communication unit (43) capable of communicating with an external system (80). The setting unit (25) sets at least one of an attribute of the load (3) and a control mode for the load (3) based on at least one of setting information input by operating the operation unit (42) and setting information received by the communication unit (43) from the external system (80).

[0120] According to this aspect, at least one of the attributes of the load (3) and the control mode for the load (3) can be set based on at least one of the setting information input from the operation unit (42) and the transmission signal transmitted from the external system (80).

[0121] A wiring device (100) of an eleventh aspect includes the moving object detection system (1) of any one of the first to seventh aspects, a load control unit (24), and a housing (2). The load control unit (24) controls a load (3) based on operation information acquired by an operation information acquisition unit (23). The housing (2) accommodates the moving object detection system (1) and the load control unit (24) and is mountable to a construction surface.

[0122] According to this aspect, the load control unit (24) can control the load (3) based on operation information acquired based on the movement of the object (300) in the second direction.

[0123] A load system (200) of a twelfth aspect includes the control system of the eighth aspect and a load (3). A load control unit (24) controls the load (3) based on operation information acquired by an operation information acquisition unit (23).

[0124] According to this aspect, the load control unit (24) can control the load (3) based on operation information acquired based on the movement of the object (300) in the second direction.

[0125] The configurations according to the second to seventh aspects are not essential for the moving object detection system 1 and may be omitted as appropriate. The configurations according to the ninth and tenth aspects are not essential for the control system and may be omitted as appropriate.

[0126] REFERENCE SIGNS LIST 1 Motion detection system 2 Housing 3 Load 10 Radio wave sensor 22 Object detection unit 23 Operation information acquisition unit 24 Load control unit 25 Setting unit 42 Operation unit 43 Communication unit 80 Communication terminal (external system) 100 Wiring device 200 Load system 300 Person (object) B11 Cluster (first part) B12 Cluster (second part) G1 Existence range

Claims

1. A motion detection system comprising: a radio wave sensor; an object detection unit; and an operation information acquisition unit, wherein the radio wave sensor transmits a transmission wave, which is a frequency-modulated radio wave, into real space at each of a plurality of detection points, and upon receiving a wave of the transmission wave reflected by an object, outputs an output signal based on the transmission wave and the reflected wave, the object detection unit detects movement of the object in a second direction intersecting a first direction which is the transmission direction of the radio waves, based on the plurality of output signals respectively output from the radio wave sensor at the plurality of detection points, and the operation information acquisition unit acquires operation information for an object to be operated, based on the movement of the object in the second direction.

2. The moving object detection system of claim 1, wherein the object detection unit further detects a range of the moving object based on the multiple output signals output from the radio wave sensor at the multiple detection points, and the operation information acquisition unit acquires the operation information based on the range of the object and the movement of the object in the second direction.

3. The moving object detection system of claim 2, wherein when the presence range includes a first portion and a second portion smaller than the first portion, the object detection unit detects the positions of the first portion and the second portion, respectively.

4. The moving object detection system according to claim 3, wherein the operation information acquisition unit acquires the operation information for the operation target based on the movement of the second part in the second direction.

5. The motion detection system of claim 4, wherein the object detection unit further detects movement of the second part in the first direction, and the operation information acquisition unit acquires the operation information for the operation target based on at least one of the movement of the second part in the first direction and the movement of the second part in the second direction.

6. A motion detection system as described in any one of claims 1 to 5, further comprising at least one of an operation unit that outputs an operation signal in response to a user's operation and a communication unit that receives an operation signal transmitted from an external system, wherein the operation information acquisition unit is capable of acquiring the operation information based on the operation signal acquired from at least one of the operation unit and the communication unit.

7. A moving object detection system as claimed in any one of claims 1 to 6, wherein the object detection unit uses one of the three or more output signals output from the radio wave sensor at each of the three or more detection points as a reference output signal, and the multiple output signals other than the reference output signal as multiple comparison signals, and determines the movement of the object based on the time difference determined for each of the multiple comparison signals between each of the multiple comparison signals and the reference output signal.

8. A control system comprising: a motion detection system according to any one of claims 1 to 7; and a load control unit, wherein the operation target is a load, and the load control unit controls the load based on the operation information acquired by the operation information acquisition unit.

9. The control system according to claim 8, further comprising a setting unit that sets at least one of an attribute of the load and a control mode of the load.

10. The control system of claim 9, further comprising at least one of an operation unit operable by a user and a communication unit capable of communicating with an external system, wherein the setting unit sets at least one of the attributes of the load and the control mode of the load based on at least one of setting information input by operating the operation unit and setting information received by the communication unit from the external system.

11. A wiring device comprising: a motion detection system according to any one of claims 1 to 7; a load control unit; and a housing, wherein the operation target is a load, the load control unit controls the load based on the operation information acquired by the operation information acquisition unit, and the housing houses the motion detection system and the load control unit and is mountable to a construction surface.

12. A load system comprising: a control system according to any one of claims 8 to 10; and the load, wherein the load control unit controls the load based on the operation information acquired by the operation information acquisition unit.

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