WO2011024634A1 - 物体検知装置およびそれを備えた照明システム - Google Patents
物体検知装置およびそれを備えた照明システム Download PDFInfo
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- WO2011024634A1 WO2011024634A1 PCT/JP2010/063491 JP2010063491W WO2011024634A1 WO 2011024634 A1 WO2011024634 A1 WO 2011024634A1 JP 2010063491 W JP2010063491 W JP 2010063491W WO 2011024634 A1 WO2011024634 A1 WO 2011024634A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/50—Systems of measurement based on relative movement of target
- G01S13/52—Discriminating between fixed and moving objects or between objects moving at different speeds
- G01S13/56—Discriminating between fixed and moving objects or between objects moving at different speeds for presence detection
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
- G01S15/50—Systems of measurement, based on relative movement of the target
- G01S15/52—Discriminating between fixed and moving objects or between objects moving at different speeds
- G01S15/523—Discriminating between fixed and moving objects or between objects moving at different speeds for presence detection
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/50—Systems of measurement based on relative movement of target
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/023—Interference mitigation, e.g. reducing or avoiding non-intentional interference with other HF-transmitters, base station transmitters for mobile communication or other radar systems, e.g. using electro-magnetic interference [EMI] reduction techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/023—Interference mitigation, e.g. reducing or avoiding non-intentional interference with other HF-transmitters, base station transmitters for mobile communication or other radar systems, e.g. using electro-magnetic interference [EMI] reduction techniques
- G01S7/0232—Avoidance by frequency multiplex
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/28—Details of pulse systems
- G01S7/285—Receivers
- G01S7/292—Extracting wanted echo-signals
- G01S7/2921—Extracting wanted echo-signals based on data belonging to one radar period
- G01S7/2922—Extracting wanted echo-signals based on data belonging to one radar period by using a controlled threshold
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/105—Controlling the light source in response to determined parameters
- H05B47/115—Controlling the light source in response to determined parameters by determining the presence or movement of objects or living beings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Definitions
- the present invention relates to an object detection apparatus including a sensor that detects the presence or absence of a detection target in a detection area and outputs a sensor signal, and an illumination system including the same.
- an object detection device equipped with a sensor (human sensor) and a lighting fixture are provided side by side, the object detection device detects the presence or absence of a detection target (for example, a person) within a predetermined detection area, and the detection target
- a lighting system for lighting a lighting fixture for a certain period of time when the presence of a lamp is detected.
- the lighting fixture can be turned on or off automatically, forgetting to turn off the lighting fixture can be prevented, and the convenience can be improved and the energy can be saved.
- the lighting system is sufficient to turn on the lighting fixtures only when people pass.
- the lighting system is sufficient to turn on the lighting fixtures only when people pass.
- a PIR (Passive Infrared Ray) sensor has been mainly used in the past for an object detection device of this type of illumination system.
- the PIR sensor is a passive type sensor that senses a temperature change caused by a human movement or the like occurring in a detection area and outputs a sensor signal. This sensor is relatively inexpensive and can be used easily.
- an active sensor capable of detecting a relatively long distance is used.
- the active type sensor detects a presence / absence of the detection target in the detection area by transmitting a detection wave such as an electromagnetic wave by itself and receiving a detection wave reflected by the detection target.
- Examples of active sensors include millimeter wave sensors and ranging sensors that use millimeter waves as detection waves.
- the millimeter wave sensor transmits the millimeter wave toward the detection area, receives the millimeter wave reflected by the detection object moving in the detection area, and the frequency difference between the transmitted millimeter wave and the received millimeter wave It comprises a Doppler sensor that outputs a sensor signal having a frequency corresponding to.
- the object detection apparatus provided with this sensor, the presence or absence of a moving body in the detection area is determined from the sensor signal output from the sensor, and the lighting state of the lighting fixture is controlled (see, for example, Japanese Patent Publication No. 2009-168778). ).
- an object of the present invention is to provide an object detection device capable of reducing the influence of noise of a specific frequency that is generated constantly and improving detection sensitivity, and an illumination system including the same.
- the object detection device of the present invention detects a presence / absence of a detection target in a detection area by transmitting a detection wave to a predetermined detection area and receiving a detection wave reflected by the detection target, and outputs a sensor signal Active type sensor, a signal processing unit that outputs a sensor signal for each predetermined frequency band, and a determination unit that determines the presence or absence of a detection object by comparing the output of the signal processing unit with a predetermined threshold value And a frequency analysis unit that detects the intensity of each frequency of the sensor signal, and a frequency band including the noise when noise of a specific frequency that is constantly at or above a specified value is detected from the output of the frequency analysis unit And a noise removing unit that invalidates the determination by the determination unit.
- the noise removing unit detects noise of a specific frequency that constantly has an intensity of a specified value or more from the output of the frequency analyzing unit, the frequency band including the noise is invalid with respect to the determination by the determining unit. Therefore, even if there is a noise source that constantly generates noise of a specific frequency around the object detection device, the presence or absence of the detection target can be determined by ignoring the frequency band including the noise. Therefore, there is an advantage that the detection sensitivity can be improved by reducing the influence of noise of a specific frequency that is constantly generated.
- the signal processing unit includes an amplifier circuit having a plurality of amplifiers that divide the sensor signal into a plurality of frequency bands and amplify the signal for each frequency band and output the amplified signal to the determination unit.
- the sensor signal is divided into a plurality of frequency bands by a plurality of amplifiers and output for each frequency band. Therefore, in the determination unit, the detection object is detected from the sensor signals of each frequency band acquired at the same timing. Can be determined.
- the senor uses a radio wave as the detection wave, and corresponds to a frequency difference between a detection wave transmitted to the detection area and a detection wave reflected by the detection object moving in the detection area. It is a Doppler sensor that outputs the sensor signal having a frequency.
- a Doppler sensor as a sensor, it is possible to detect the presence or absence of a detection target that moves within the detection area, and an object that is stationary at a fixed position can be excluded from the detection target. .
- the sensor signal that is output when the sensor detects the presence of the detection object has a frequency spread of a predetermined width or more depending on at least the size of the detection object, and the signal processing The bandwidth of the frequency band output by the unit is set to be narrower than the predetermined width.
- the noise removal unit invalidates the frequency band including the noise
- the determination unit can determine the presence or absence of the detection target.
- the determination unit sets the threshold individually for each frequency band output from the signal processing unit, and the change width of the intensity of the sensor signal detected by the frequency analysis unit is a predetermined time.
- the threshold is reset according to the surrounding environment at the time of stability.
- the threshold is reset according to the surrounding environment. Therefore, it is possible to detect the presence / absence of the detection object with the optimum sensitivity according to the surrounding environment. Is possible.
- an illumination system includes the object detection device described above and a lighting fixture connected to the object detection device.
- the object detection device detects the presence of the detection target, It has the illumination control part which controls the lighting state of a lighting fixture so that it may light.
- the present invention it is possible to improve the detection sensitivity by reducing the influence of noise of a specific frequency that is generated constantly, so that the situation where the sensor signal is buried in the noise and cannot be detected and the lighting fixture does not light is avoided can do.
- Embodiment 1 of this invention It is a block diagram which shows the structure of Embodiment 1 of this invention. It is the schematic which shows the installation condition of Embodiment 1 of this invention. It is the schematic which shows the detection state of the detection target object of Embodiment 1 of this invention. It is a graph which shows the output of the frequency analysis part of Embodiment 1 of this invention. It is a graph which shows the output of the frequency analysis part of Embodiment 1 of this invention.
- the illumination system includes an object detection device 1 including a sensor 10 that detects the presence or absence of a detection target in a detection area A ⁇ b> 1 and outputs a sensor signal, and the object detection device 1. And a lighting fixture 2 that is connected and whose lighting state is controlled by the object detection device 1.
- the object detection device 1 and the lighting fixture 2 are attached close to each other on the ceiling C1 above the detection area A1.
- a conical detection area A1 having the sensor 10 as a vertex is formed below the sensor 10.
- the sensor 10 of the object detection device 1 transmits a detection wave such as an electromagnetic wave to the detection area A1 and receives a detection wave reflected by the detection target to determine whether the detection target in the detection area A1 exists. It comprises an active sensor 10 to be detected.
- a millimeter wave of 24.15 [GHz] is transmitted toward the detection area A1, and the millimeter wave reflected by the detection object moving in the detection area A1 is received and transmitted.
- a millimeter wave sensor Doppler sensor
- this sensor 10 utilizes the fact that the frequency of the reflected wave shifts due to the Doppler effect when an object that reflects electromagnetic waves (millimeter waves) is moving. Detect the presence or absence.
- the object detection device 1 includes, in addition to the sensor 10 described above, an amplification circuit 11 that amplifies a sensor signal output from the sensor 10 into a plurality of frequency bands and amplifies the frequency signals for each frequency band, and an amplification circuit 11.
- a determination unit 12 that determines the presence / absence of the detection target by comparing the output of the light source with a predetermined threshold, and an illumination control unit 13 that controls the lighting state of the light source 3 of the lighting fixture 2 according to the determination result of the determination unit 12 And.
- the object detection apparatus 1 of the present embodiment includes a frequency analysis unit 14 that detects the intensity of each frequency of the sensor signal output from the sensor 10, and a specific frequency that is constantly generated using the analysis result of the frequency analysis unit 14.
- a noise removing unit 22 (noise determining unit 15 and switching circuit 16) that reduces the influence of noise is provided.
- an FFT (Fast Fourier Transform) analyzer that performs analysis in units of 0.2 [s] is used as the frequency analysis unit 14, and the determination unit 12, the illumination control unit 13, and the noise removal unit 22 are mainly microcomputers. It is assumed to be included in the control block 17 to be configured.
- the amplifier circuit 11 constitutes a signal processing unit that outputs a sensor signal for each predetermined frequency band.
- the signal processing unit is not limited to this, and the signal processing unit has a configuration using an FFT analyzer, a digital filter, or the like. There may be.
- the amplifier circuit 11 has a plurality of amplifiers 18 using operational amplifiers, and by adjusting various parameters of the circuits constituting each amplifier 18, it is possible to set a frequency band in which each amplifier 18 amplifies a signal. is there. That is, each amplifier 18 also functions as a band-pass filter that passes a signal in a specific frequency band.
- each amplifier 18 also functions as a band-pass filter that passes a signal in a specific frequency band.
- the sensor signals are divided into a plurality of frequency bands by a plurality of amplifiers 18 connected in parallel, and the signals in the respective frequency bands are respectively amplified by the amplifiers 18 and output individually. In this way, by amplifying a weak sensor signal by the amplifier circuit 11, processing in the determination unit 12 at the subsequent stage is facilitated.
- the determination unit 12 detects the detection target M1 when the movement speed of the person is assumed to be 2 [m / s] or less.
- the frequency band of the sensor signal necessary for this is about 0 to 160 [Hz].
- the frequency (Doppler frequency) “f d ” of the signal is expressed by the following equation [Formula 1].
- the detection object M1 moves at a constant speed in the detection area A1 due to the human body having a certain size (height) and complicated movement of each part (such as limbs) during movement.
- the sensor signal output when detecting the detection object M1 usually has a bandwidth of about 40 to 50 [Hz].
- the frequency band of 0 to 200 [Hz] is narrower than the bandwidth (40 to 50 [Hz]) of the sensor signal output when detecting the detection target M1.
- Shall be divided by.
- the frequency band (hereinafter referred to as “pass band”) to be amplified by each amplifier 18 is divided into 0 to 200 so that the frequency band of 0 to 200 [Hz] is divided in increments of 10 [Hz].
- 10 [Hz], 10 to 20 [Hz], 20 to 30 [Hz],..., 190 to 200 [Hz] and are set so as to be shifted from each other in increments of 10 [Hz].
- the determination unit 12 A / D converts the output of the amplifier 18 into a digital value, and has a comparator 19 for comparing with a predetermined threshold value for each amplifier 18, and determines whether the detection target M ⁇ b> 1 exists.
- a threshold value is individually set for each pass band (that is, each amplifier 18), and an H level signal is output when the output of the amplifier 18 is outside the range defined by the threshold value.
- the threshold value “Vth” of each path band set in the initial state (shipment state) is the output value “V” of each amplifier 18 measured within a certain time in a state where there is no reflection of electromagnetic waves such as an anechoic chamber.
- the determination unit 12 includes a logical sum circuit 20 that performs a logical sum of the comparison results. If there is at least one H level signal, the determination unit 12 performs a logical sum of detection signals indicating a “detection state” in which the detection target M1 exists. On the other hand, a detection signal indicating a “non-detection state” in which the detection target M1 does not exist is output from the logical sum circuit 20 if all the signals are at the L level. The detection signal is “1” in the detection state and “0” in the non-detection state.
- the lighting control unit 13 receives the detection signal output from the determination unit 12 and generates a control signal to be transmitted to the lighting fixture 2.
- the illumination control unit 13 outputs a control signal for turning on the light source 3 if the light source 3 of the lighting fixture 2 is turned off when the detection signal from the determination unit 12 is “1” (detection state). It transmits with respect to the lighting fixture 2, and the light source 3 is turned on.
- the illumination control unit 13 starts counting a predetermined lighting holding time. On the other hand, if the light source 3 is already lit when the detection signal from the determination unit 12 is “1”, the lighting holding time count is reset.
- the illumination control unit 13 transmits a control signal for turning off the light source 3 to the lighting fixture 2 to turn off the light source 3.
- the lighting control unit 13 may be provided on a power supply line to the lighting fixture 2, and in this case, instead of outputting a control signal, the light source 3 is turned on / off by turning on / off the power supply to the lighting fixture 2. Can be turned on / off.
- the noise removal unit 22 includes a noise determination unit 15 that determines the presence / absence of noise of a specific frequency that is constantly generated from the output of the frequency analysis unit 14, and each amplifier for the determination unit 12 according to the determination result of the noise determination unit 15. And a switching circuit 16 for switching 18 output states.
- the switching circuit 16 includes switches 21 inserted between the amplifiers 18 of the amplifier circuit 11 and the comparators 19 of the determination unit 12. In an initial state, all the switches 21 are turned on. And Then, each switch 21 is individually controlled to be turned on / off by the output from the noise determination unit 15, so that the output of each amplifier 18 to the determination unit 21 is turned on / off individually. That is, in the switching circuit 16, the output from the noise determination unit 15 is 0 to 10 [Hz], 10 to 20 [Hz], 20 to 30 [Hz],. By turning off the switch 21 corresponding to the amplifier 18 of an arbitrary pass band, the output of the amplifier 18 can be invalidated.
- the noise determination unit 15 reads the signal strength (here, voltage strength) of the sensor signal for each frequency (frequency component) output from the frequency analysis unit 14 and stores it in a memory (not shown), and the stored data Is used to determine the presence or absence of noise of a specific frequency that is constantly generated.
- the noise determination unit 15 reads the analysis result analyzed in units of 0.2 [s] by the frequency analysis unit 14 every 0.2 [s], and the analysis read during 1 [s]. An average value of the results is calculated, and the average value is stored as intensity data.
- the frequency analysis unit 14 analyzes and outputs the signal intensity for each frequency in the unit of 1 [Hz] between 1 and 200 [Hz], and the noise determination unit 15 performs the following [Table 1]. As shown, intensity data (unit: [mV]) is stored every 1 [s] for each frequency.
- the noise determination unit 15 determines the maximum value and the minimum value of the intensity data for each frequency for the past 10 [s] (that is, from time t (n-9) to t (n) in [Table 1]). It is determined whether or not the relationship between the maximum value and the minimum value satisfies “minimum value ⁇ maximum value ⁇ 0.8”. That is, for each frequency, it is determined whether or not the fluctuation amount of the intensity data during the past 10 [s] is within a certain range (here, within 20 [%] of the maximum value). Here, if it is determined that the intensity data fluctuates within a certain range while satisfying the condition of “minimum value ⁇ maximum value ⁇ 0.8”, the noise determination unit 15 determines “when stable”.
- the noise determination unit 15 compares the intensity data for each frequency with a predetermined value set in advance, and determines the presence or absence of noise of a specific frequency that is constantly generated. To do. That is, if the intensity data of a certain frequency exceeds the specified value at “stable”, it is considered that noise at that frequency is constantly generated. In this case, it is determined that there is noise at a specific frequency. .
- the specified value is determined using the output value “V” of the amplifier 18. Specifically, the maximum value of the peak-to-peak “Vpp” of the output value “V” for all the amplifiers 18 is taken, and the doubled voltage intensity is set as a specified value to be compared with the intensity data. In other words, if the peak-to-peak “Vpp” of the output value V of each amplifier 18 varies in the range of 0.100 to 0.150 [V], the noise determination unit 15 compares it with the intensity data.
- the specified value is 0.300 [V] which is twice the maximum value of 0.150 [V] in the above "Vpp".
- the switch 21 between the amplifier 18 having the pass band including the noise and the determination unit 12 is switched.
- the switching circuit 16 is controlled to turn off. Thereby, when the noise of a specific frequency has generate
- the ON / OFF state of the switch 21 is updated every time when the noise determination unit 15 determines “stable”.
- FIGS. 4 and 5 both show the output of the frequency analysis unit 14, with the horizontal axis representing frequency [Hz] and the vertical axis representing voltage intensity [mV].
- the determination unit 12 compares the threshold value with the output of the amplifier 18 for all the pass bands of the amplifiers 18 to determine whether the detection target M1 exists.
- the switching circuit 16 corresponds to the amplifier 18 having a pass band of 30 to 40 [Hz].
- the switch 21 is turned off, and the output (30 to 40 [Hz]) of the amplifier 18 to the determination unit 12 is invalidated.
- the determination unit 12 compares the threshold value with the output of the amplifier 18 only for the pass band of the amplifier 18 other than 30 to 40 [Hz] (0 to 30 [Hz], 40 to 200 [Hz]). And the presence / absence of the detection object M1 is determined.
- the noise removing unit 22 includes noise when a noise having a specific frequency whose signal intensity is constantly equal to or greater than the specified value Th is detected from the analysis result of the frequency analyzing unit 14.
- the output of the amplifier 18 having the frequency band as the pass band is invalidated. Therefore, when there is a noise source that constantly generates noise of a specific frequency around the object detection device 1, the determination unit 12 relates to a frequency band that includes noise that is regularly generated by the noise source. Can be ignored and the presence or absence of the detection object M1 can be determined. As a result, the presence / absence of the detection target M1 can be detected without being affected by noise of a specific frequency that is generated constantly, leading to an improvement in detection sensitivity.
- the signal component of the sensor signal can be distinguished from noise that is constantly generated.
- the sensor signal output when detecting the detection object M1 has a frequency (Doppler frequency) “f d ” as described above, and the horizontal distance “x” between the sensor 10 and the detection object M1, as described above. Since it changes at any time according to the moving speed “V”, it does not occur constantly at a specific frequency like noise. Therefore, it is not determined as “stable” when the detection target M1 is detected, and the noise removal unit 22 distinguishes the sensor signal that is output when the detection target M1 is detected from the noise that is constantly generated. Only the frequency band including can be invalidated.
- the frequency band of 0 to 200 [Hz] in the amplifier circuit 11 is narrower than the bandwidth (40 to 50 [Hz]) of the sensor signal output when detecting the detection object M1. It is divided by. Therefore, when invalidating a frequency band including noise of a specific frequency, it is possible to prevent all signal components from being lost, and to suppress a decrease in detection sensitivity as much as possible.
- the determination unit 12 is configured to reset a threshold value to be compared with the output of the amplifier circuit 11 when the noise determination unit 15 determines “stable”.
- the sensor 10 may be an active sensor 10 and is not limited to the above-described millimeter wave sensor, but may be a microwave sensor using a microwave, or a distance to an object in the detection area A1 using, for example, an ultrasonic wave as a detection wave. It may be a distance measuring sensor that detects Even in the distance measuring sensor, since the frequency of the received ultrasonic wave has a certain bandwidth, even if the frequency band including noise of a specific frequency is invalidated, the detection target M1 can be detected from the remaining frequency band. Is possible.
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Abstract
Description
本実施形態の照明システムは、図2に示すように、検知エリアA1内の検知対象物の存否を検知してセンサ信号を出力するセンサ10を具備した物体検知装置1と、物体検知装置1に接続され物体検知装置1により点灯状態が制御される照明器具2とを備えている。物体検知装置1および照明器具2は、検知エリアA1上方の天井C1に互いに近接して取り付けられている。ここでは、倉庫等の高さ“h1”=10〔m〕の天井C1に物体検知装置1と照明器具2とが取り付けられ、物体検知装置1のセンサ10は下方に向けて鉛直方向に対して約30度の視野角“θ”を持つものとする。しかして、センサ10の下方には、センサ10を頂点とする円錐状の検知エリアA1が形成される。
Claims (6)
- 所定の検知エリアに検知波を送信し検知対象物にて反射された検知波を受信することで検知エリア内の検知対象物の存否を検知してセンサ信号を出力するアクティブ型のセンサと、センサ信号を予め定められている周波数帯域ごとに出力する信号処理部と、信号処理部の出力を所定の閾値と比較することにより検知対象物の存否を判定する判定部と、センサ信号の各周波数の強度を検出する周波数解析部と、周波数解析部の出力から定常的に規定値以上の強度となる特定周波数のノイズが検出された場合に、当該ノイズを含む周波数帯域を判定部での判定に関して無効とするノイズ除去部とを備えることを特徴とする物体検知装置。
- 前記信号処理部は、センサ信号を複数の周波数帯域に分け周波数帯域ごとに増幅して前記判定部に出力する複数の増幅器を有した増幅回路からなることを特徴とする請求項1記載の物体検知装置。
- 前記センサは、前記検知波として電波を用い、前記検知エリアに送信した検知波と検知エリア内を移動する前記検知対象物で反射された検知波との周波数の差分に相当する周波数の前記センサ信号を出力するドップラセンサであることを特徴とする請求項1または請求項2に記載の物体検知装置。
- 前記センサが前記検知対象物の存在を検知した際に出力する前記センサ信号は、少なくとも検知対象物の大きさに依存して周波数に所定幅以上の広がりを持ち、前記信号処理部の出力する周波数帯域の帯域幅は、前記所定幅よりも狭く設定されていることを特徴とする請求項3記載の物体検知装置。
- 前記判定部は、前記信号処理部から出力される周波数帯域ごとに前記閾値が個別に設定され、且つ前記周波数解析部で検出される前記センサ信号の強度の変化幅が一定時間に亘り規定範囲内に収まった安定時には、安定時の周辺環境に合わせて閾値を再設定することを特徴とする請求項1ないし請求項4のいずれか1項に記載の物体検知装置。
- 請求項1ないし請求項5のいずれかの物体検知装置と、物体検知装置に接続された照明器具とを備え、物体検知装置は、前記検知対象物の存在を検知すると照明器具を点灯させるように照明器具の点灯状態を制御する照明制御部を有することを特徴とする照明システム。
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US13/392,219 US9146310B2 (en) | 2009-08-26 | 2010-08-09 | Object detection device and illumination system provided therewith |
CN201080037565.7A CN102597810B (zh) | 2009-08-26 | 2010-08-09 | 对象检测设备及设置有该对象检测设备的照明系统 |
EP10811684.9A EP2472292B1 (en) | 2009-08-26 | 2010-08-09 | Object detection device and illumination system provided therewith |
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JP2009196108A JP5584442B2 (ja) | 2009-08-26 | 2009-08-26 | 物体検知装置およびそれを備えた照明システム |
JP2009-196108 | 2009-08-26 |
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US (1) | US9146310B2 (ja) |
EP (1) | EP2472292B1 (ja) |
JP (1) | JP5584442B2 (ja) |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2011095011A (ja) * | 2009-10-27 | 2011-05-12 | Panasonic Electric Works Co Ltd | センサシステム |
EP2571335A3 (en) * | 2011-09-15 | 2014-06-18 | Ingenium, Ingenieria Y Domotica S.L., Parque Tecnologico de | Motion detector |
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JP5895213B2 (ja) * | 2012-05-29 | 2016-03-30 | パナソニックIpマネジメント株式会社 | 照明装置 |
JP5942166B2 (ja) * | 2012-05-29 | 2016-06-29 | パナソニックIpマネジメント株式会社 | 照明装置 |
JP6041188B2 (ja) * | 2012-06-01 | 2016-12-07 | パナソニックIpマネジメント株式会社 | センサ装置 |
US20150130652A1 (en) * | 2012-06-05 | 2015-05-14 | Panasonic Intellectual Property Management Co., Lt | Signal processing device |
JP6249325B2 (ja) | 2012-12-28 | 2017-12-20 | パナソニックIpマネジメント株式会社 | 信号処理装置 |
US9869758B2 (en) | 2013-05-03 | 2018-01-16 | Philips Lighting Holding B.V. | Mitigating disturbance in sensing |
CN103543447B (zh) * | 2013-09-22 | 2016-08-10 | 浙江工商大学 | 超声波短距高精度测量中环境噪音剔除方法 |
DE102015107221B4 (de) * | 2015-05-08 | 2018-04-12 | Sick Ag | Elektromagnetischer Näherungssensor und Verfahren zur Erfassung eines Zielobjekts |
JP6755002B2 (ja) * | 2016-05-26 | 2020-09-16 | パナソニックIpマネジメント株式会社 | センサ装置及び照明装置 |
CN106618588A (zh) * | 2017-02-28 | 2017-05-10 | 广东工业大学 | 一种基于脉搏反馈的自动检测人体摔倒传感方法及装置 |
CN107703553A (zh) * | 2017-08-17 | 2018-02-16 | 广州隽智智能科技有限公司 | 一种在位行为监测方法及系统 |
WO2020120273A1 (en) * | 2018-12-12 | 2020-06-18 | Signify Holding B.V. | A motion detector, a luminaire, a corresponding method |
US11922792B2 (en) | 2019-02-22 | 2024-03-05 | Signify Holding B.V. | Luminaire, and a corresponding method |
US11709245B2 (en) * | 2019-04-29 | 2023-07-25 | Adnoviv Inc. | System and methods for radar-based detection of people in a room |
EP3910369A1 (en) * | 2020-05-13 | 2021-11-17 | Stichting IMEC Nederland | Radar detection sensor, system and method |
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- 2010-08-09 CN CN201080037565.7A patent/CN102597810B/zh not_active Expired - Fee Related
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Also Published As
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JP2011047779A (ja) | 2011-03-10 |
EP2472292A1 (en) | 2012-07-04 |
JP5584442B2 (ja) | 2014-09-03 |
CN102597810A (zh) | 2012-07-18 |
US20130009555A1 (en) | 2013-01-10 |
US9146310B2 (en) | 2015-09-29 |
EP2472292B1 (en) | 2016-09-28 |
CN102597810B (zh) | 2015-10-14 |
EP2472292A4 (en) | 2013-01-16 |
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