JP2009129775A - Lighting fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting fixture capable of performing detection of a person with no error detection without having any influence of noises caused by a power source frequency and mounting a sensor in the vicinity of a light source. <P>SOLUTION: A sensor section includes a millimeter wave sensor 11 for sensing movements of the person, two amplifier circuits 16, 17 for amplifying detected signals, and a comparator circuit 19 for comparing with a threshold. The amplifier circuit 1 (16) has a structure including a BPF 1 (band pass filter), and amplifies the signals detected by the millimeter wave sensor 11 from 0 Hz to 100 Hz which is twice of the power source frequency. The amplifier circuit 2 (17) has the same structure, and amplifies the signals detected by the millimeter wave sensor 11 from 100 Hz to hundreds Hz. The amplified signal is converted into a signal cutting the frequency (100 Hz) of the integral multiple of the power source frequency so that two amplifier circuits 16, 17 are connected with each other in parallel and composition of the amplified signal is performed by a summer 18 before input of a comparator circuit 19. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a lighting fixture, and more particularly to a sensor-equipped lighting fixture that uses a detection element to determine the presence or absence of a human body in a detection area and control lighting of a light source.

  Conventionally, a PIR sensor (passive infrared sensor) has been used as a human sensor attached to a lighting fixture (see, for example, Patent Document 1). The PIR sensor is inexpensive and can be used easily, and is widely used for lighting fixtures with sensors. However, the detection distance of the PIR sensor is not so long, and it is difficult to detect a human being located at a long distance.

  As a means to solve this, there was a method of using a millimeter wave sensor instead of PIR. The millimeter wave sensor is a sensor that transmits and receives millimeter waves and detects a frequency difference caused by the Doppler effect, and can detect a long distance.

JP 2005-235398 A

  When a human motion is detected by the millimeter wave sensor, the frequency difference (Doppler frequency) between millimeter waves caused by the human motion is 0 to several hundred Hz. In general, the lighting frequency of copper-iron type fluorescent lamps is 100Hz or 120Hz, which is an integral multiple of the power supply frequency (50Hz / 60Hz). It was. On the other hand, other light sources such as Hf fluorescent lamps (high-frequency lighting type fluorescent lamps) and electrodeless discharge lamps (long-life light sources) are high-frequency lightings, so it was thought that the above problems would not occur. .

  However, it was found that when a sensor was actually installed in the vicinity of an Hf fluorescent lamp or an electrodeless discharge lamp, noise based on the operating frequency of the power supply was generated in the vicinity, which hindered detection. Therefore, it is difficult to install the sensor in the vicinity of the light source, which may cause a problem in design.

  The present invention has been made in view of the above-described conventional circumstances, and is capable of detecting a human detection without being erroneously detected without being affected by noise due to a power supply frequency, so that the sensor can be attached in the vicinity of the light source. The purpose is to provide equipment.

  The lighting fixture of the present invention includes a light source that is turned on when power is supplied from a power source, a sensor unit that detects the presence of a person, and a control unit that controls lighting of the light source according to a signal from the sensor unit. In the lighting apparatus, the sensor unit detects a human presence and generates a human detection signal, and from the human detection signal generated by the millimeter wave sensor, the sensor unit detects an operating frequency of the power source. And a filter circuit that removes an integral multiple of the frequency.

  According to the above configuration, noise based on the power supply frequency can be ignored by cutting a frequency that is an integral multiple of the power supply frequency among the signals detected by the millimeter wave sensor, so human detection without false detection is possible. Thus, the sensor unit can be attached in the vicinity of the light source.

  Moreover, the lighting fixture of this invention WHEREIN: The said filter circuit removes the frequency 2 times the operating frequency of the said power supply, It is characterized by the above-mentioned.

  According to the above configuration, by cutting twice the frequency of the power supply frequency (100 Hz or 120 Hz), malfunction due to noise caused by the power supply frequency is eliminated, so the sensor mounting position can be arranged near the light source. As a result, it becomes possible to make the instrument compact and improve the design.

  In the lighting fixture of the present invention, the filter circuit cuts a band from 100 Hz to 120 Hz.

  According to the above configuration, by providing a filter that cuts the frequency band from 100 Hz to 120 Hz in the sensor circuit, it is possible to avoid noise that becomes a problem, and human detection without false detection becomes possible. The sensor can be used in the vicinity of the light source.

  Further, in the lighting apparatus of the present invention, the filter circuit is a filter circuit for 50 Hz or a filter circuit for 60 Hz corresponding to a commercial power supply frequency, and is configured to be switched depending on the power supply frequency at the time of use. To do.

  According to the above configuration, a notch filter that cuts for each frequency band is prepared, and a filter for any frequency can be selected and set manually at the time of construction of the instrument, so that the influence of noise due to the power supply frequency can be reduced. The lighting fixture which does not receive can be comprised simply.

  The lighting fixture of the present invention includes a frequency detection unit that detects a power supply frequency to be used, and a switch that switches the filter circuit for 50 Hz or the filter circuit for 60 Hz according to a detection result in the frequency detection unit. It is characterized by that.

  According to the above configuration, it is possible to detect a human feeling without erroneous detection without being affected by noise due to the power frequency regardless of the power frequency at the installation location, thereby reducing the burden at the time of installation.

  According to the lighting apparatus of the present invention, by providing a filter in the sensor circuit that cuts a frequency band that is an integral multiple of the operating frequency of the power supply, noise that is a problem can be avoided, and human detection without erroneous detection is possible. Is possible. As a result, the sensor can be used in the vicinity of the light source.

  A lighting apparatus according to an embodiment of the present invention controls lighting of a light source based on human body detection for detecting the presence or absence of a person in a certain area, and is a frequency that is an integral multiple of a power supply frequency that causes noise in the sensor. By cutting the components, it is possible to attach a sensor near the light source.

  FIG. 1 is an image diagram of a lighting device with a human sensor according to an embodiment of the present invention, FIG. 1A is a sketch thereof, and FIG. 1B is a cross-sectional view thereof. The figure shows an example in the case of a lighting fixture with a sensor for two lamps using a straight tube type fluorescent lamp 12 used in a facility or office. The millimeter wave sensor 11 is installed at a substantially central portion of the instrument body.

  FIG. 2 is a block diagram of the lighting device with a human sensor according to the present embodiment. As shown in the figure, the lighting fixture with a human sensor of the present embodiment includes a light source 15 such as a fluorescent lamp 12 mounted on the fixture body, a control unit 14 that controls lighting of the light source 15, and a trigger for the control unit 14. And a sensor unit 13 for detecting information. Here, the sensor used for the sensor unit 13 is the millimeter wave sensor 11.

  The millimeter wave sensor 11 detects two frequency differences (Doppler frequencies) when millimeter waves are transmitted and received. The Doppler frequency varies depending on the size of the target, the moving speed, the moving direction, and the positional relationship. For example, the Doppler frequency when a person moves is 0 to several hundred Hz.

  FIG. 3 is a configuration block diagram of the sensor unit 13 of the lighting device with a human sensor according to the first embodiment of the present invention. As shown in the figure, the sensor unit 13 includes a millimeter wave sensor 11 that detects a person's movement, two amplifier circuits 16 and 17 that amplify the detected signal, and an adder that combines the outputs of the amplifier circuits 16 and 17. 18 and a comparator circuit 19 that compares the output of the adder 18 with a threshold value.

  The frequency band necessary for the millimeter wave sensor 11 to detect a person or the like is in the range of 0 to several hundred Hz. Further, it is necessary to cut a frequency that is an integral multiple of the power supply frequency so that noise caused by the power supply frequency can be ignored.

  In Japan, commercial power supply frequencies are divided into two, 50 Hz and 60 Hz, in the east and west. In this embodiment, a case where the power supply frequency is 50 Hz is considered. That is, the frequency of noise caused by the power supply is 100 Hz, which is twice the power supply frequency.

  4A and 4B show amplification bands of the amplifier circuit 1 (16) and the amplifier circuit 2 (17). FIG. 4A shows the BPF1 characteristic of the amplifier circuit 1 (16), and FIG. 4B shows the amplifier circuit 2 (17). ) Shows BPF2 characteristics. FIG. 5 shows an amplification band diagram after the synthesis by the adder 18.

  The signal from the millimeter wave sensor 11 is amplified by the amplifier circuit 1 (16) and the amplifier circuit 2 (17). The amplifier circuit 1 (16) has a structure including BPF1 (bandpass filter), and amplifies from 0 Hz of the signal detected by the millimeter wave sensor 11 to 100 Hz which is twice the power supply frequency as shown in FIG. .

  The amplifier circuit 2 (17) is also an amplifier circuit having a similar structure, and here, amplifies from 100 Hz to several hundreds of Hz. The two amplifier circuits 16 and 17 are connected in parallel and synthesized by the adder 18 before the input of the comparator circuit 19, so that a signal (100 Hz) that is an integral multiple of the power supply frequency is cut as shown in FIG. Convert to

  In the comparator circuit 19, the detection signal is compared with a preset threshold value, and if the detection signal exceeds the threshold value, a signal is output to the control unit 14 so that the lamp is lit. If there is no further ON signal from the sensor unit 13 after a lapse of a certain time from lighting, the control unit 14 of the light source 15 turns off the light source 15.

  As described above, according to the lighting apparatus of the present embodiment, by cutting the frequency (100 Hz) that is an integral multiple of the power supply frequency, malfunction due to noise caused by the power supply frequency is eliminated, so the sensor mounting position is It becomes possible to arrange in the vicinity of the light source, and it becomes possible to make the instrument compact and improve the design.

  A filter that automatically changes the frequency to be cut by providing a circuit for determining the power supply frequency in the amplifier circuit of the sensor unit 13 (cuts 100 Hz for 50 Hz and 120 Hz for 60 Hz). A configuration is also possible.

  The configuration of the lighting device with a human sensor according to the second embodiment of the present invention is the same as that shown in FIG. 2, and includes a device body, a light source 15 attached to the device body, a control unit 14 that controls lighting of the light source 15, and a control. It is comprised with the sensor part 13 which detects the trigger information with respect to the part 14. FIG. The sensor used for the sensor unit 13 is the millimeter wave sensor 11.

  The detection signal of the millimeter wave sensor 11 is amplified only in the frequency band from 0 to several hundred Hz using an amplifier circuit including a band pass filter. The detection signal is compared with a threshold value set in advance by the comparator circuit 19. If the detection signal exceeds the threshold value, an ON signal is output to the light source control unit 14 and the light source 15 is turned on. If there is no further signal from the sensor unit 13 after a lapse of a certain time from lighting, the control unit 14 of the light source 15 turns off the light source 15.

  As in the first embodiment, as shown in FIG. 3, the sensor unit 13 includes a millimeter wave sensor 11 that detects a person's movement, two amplifier circuits 16 and 17 that amplify the detected signal, and outputs of the amplifier circuits 16 and 17. And the comparator circuit 19 that compares the output of the adder 18 with a threshold value.

  The frequency band required for the millimeter wave sensor 11 to detect a person or the like is in the range of 0 to several hundred Hz. Further, it is necessary to cut a frequency that is an integral multiple of the power supply frequency so that noise caused by the power supply frequency can be ignored.

  In Japan, commercial power supply frequencies are divided into two, 50 Hz and 60 Hz, in the east and west. In this embodiment, in order to prevent malfunction at either frequency, both 100 Hz and 120 Hz, which are twice the frequency, are cut.

  The signal from the millimeter wave sensor 11 is amplified by the amplifier circuit 1 (16) and the amplifier circuit 2 (17). The amplifier circuit 1 (16) has a structure including BPF1 (band pass filter), and amplifies from 0 Hz of the signal detected by the millimeter wave sensor 11 to 100 Hz which is twice the power supply frequency as shown in FIG.

  The amplifier circuit 2 (17) also amplifies from 120 Hz to several hundred Hz as an amplifier circuit having a similar structure. The two amplifier circuits 16 and 17 are connected in parallel and synthesized by the adder 18 before the input of the comparator circuit 19, so that the signal is obtained by cutting frequencies (100 Hz and 120 Hz) that are integral multiples of the two power supply frequencies. Convert. FIG. 6 shows the frequency band of the second embodiment.

  In the comparator circuit 19, the detection signal is compared with a preset threshold value, and if the detection signal exceeds the threshold value, a signal is output to the control unit 14 so that the lamp is lit. If there is no further ON signal from the sensor unit 13 after a lapse of a certain time from lighting, the control unit 14 of the light source 15 turns off the light source 15.

  The configuration of the lighting device with a human sensor according to the third embodiment of the present invention is the same as that of FIG. 2, and includes a device main body, a light source 15 attached to the device main body, a control unit 14 that controls lighting of the light source 15, It is comprised with the sensor part 13 which detects the trigger information with respect to the control part 14. FIG. The sensor used for the sensor unit 13 is the millimeter wave sensor 11.

  FIG. 7 illustrates an example of a notch filter circuit according to the third embodiment, and FIG. 8 illustrates a block diagram of a configuration of a lighting fixture sensor unit with a human sensor according to the third embodiment.

  As shown in FIG. 8, the sensor unit 13 includes a millimeter wave sensor 11 that detects a person's movement, a notch filter 28 that cuts a frequency caused by a power supply frequency, and an amplifier circuit 27 that amplifies the detected signal. The comparator circuit 19 compares the output of the amplifier circuit 27 with a threshold value.

  As shown in FIG. 7, the notch filter 28 includes a T-type circuit including resistance elements 21 and 22 having a resistance value R and a capacitance element 25 having a capacitance value 2C, capacitance elements 23 and 24 having a capacitance value C, and resistance value R / 2. The resistor element 26 is composed of a parallel circuit with a T-type circuit.

  The detection signal of the millimeter wave sensor 11 is amplified only in the frequency band from 0 to several hundred Hz using an amplifier circuit 27 including a band pass filter. The detection signal is compared with a threshold value set in advance by the comparator circuit 19, and if the detection signal exceeds the threshold value, the comparator circuit 19 outputs an ON signal to the light source control unit 14 and the light source 15 is turned on. . If there is no further signal from the sensor unit 13 after a lapse of a certain time from lighting, the control unit 14 of the light source 15 turns off the light source 15.

  FIGS. 9A and 9B show examples of amplification bands depending on the power supply frequency. FIG. 9A shows a case for 50 Hz, and FIG. 9B shows a case for 60 Hz. The notch filter 28 is provided at a subsequent stage of the amplifier circuit 27 and cuts frequency components with an integral multiple of the power supply frequency as the center frequency so as not to receive noise caused by the power supply frequency in question.

  The power supply frequency is largely divided into two parts (50 / 60Hz) in the east and west, but notch filter 28 that cuts the frequency band around 100Hz and 120Hz, which are integer multiples of each power supply frequency, can be used for both. Set each one. Then, the frequency to be cut is switched according to the power supply frequency at the time of construction of the instrument.

  Next, an example in which a frequency component that is an integral multiple of the operating frequency of the power supply is removed will be described. FIG. 10 shows a filter configuration for removing frequency components twice, three times and four times when the operating frequency of the power supply is 60 Hz. As shown in the figure, removal of frequency components twice (120 Hz), three times (180 Hz) and four times (240 Hz) of the operating frequency of the power supply is performed by the notch filters 31, 32 and 33 corresponding to the respective frequencies. Each frequency component is removed. Furthermore, it is possible to easily cope with higher frequency components by changing the constant.

  The main noise component is twice the component of the commercial power supply frequency.For example, in addition to the double frequency component, if the noise component appears three times or four times, the corresponding notch This can be done by connecting filters in series.

  Further, the frequency of 100 to 120 Hz may be cut so that the two power supply frequencies can be handled without switching. Further, it is possible to provide a filter configuration in which a frequency determination circuit is provided in the notch filter unit 28 to determine whether the power supply frequency is 50 Hz or 60 Hz, and the frequency to be cut is automatically changed.

  A determination circuit that automatically sets the frequency to be cut will be described. FIG. 11 shows a block configuration of a lighting device with a human sensor provided with such a determination circuit.

  The power supply block 52 converts the alternating current from the commercial power supply 51 into a necessary direct current signal and supplies a direct current voltage necessary for the operation of the millimeter wave sensor 11 (example: AC100V → DC5V). The millimeter wave sensor 11 constantly transmits and receives millimeter waves and detects the presence or absence of movement of an object in the detection area.

  The amplifier circuit unit 53 amplifies the signal from the millimeter wave sensor 11. The frequency detection unit 56 detects the frequency of the commercial power supply 51 and detects whether the frequency is 50 Hz / 60 Hz. For example, the frequency detection unit 56 outputs L to the notch filter unit 28 if it is 50 Hz and H if it is 60 Hz.

  The notch filter unit 28 selects which of 50 Hz / 60 Hz is to be filtered based on the information from the frequency detection unit 56. That is, the notch filter unit 28 removes the 50 Hz frequency component when the signal from the frequency detection unit 56 is 0, and removes the 60 Hz frequency component when the signal from the frequency detection unit 56 is 1.

  In the detection circuit unit 54, the signal from which the frequency component causing the malfunction in the notch filter unit 28 is removed is compared with a preset threshold value, and when the threshold value is exceeded, H is exceeded. If not, L is output to the sensor control unit 55.

  The sensor control unit 55 receives a signal from the detection circuit unit 54, outputs a signal for turning on the light source unit 15 in the case of H, and turns on the light source unit 15. The light source unit 15 includes a lamp and a ballast, and receives a signal output from the sensor control unit 55 to blink the lamp.

  FIG. 12 shows the configuration of the notch filter unit 28. The notch filter unit 28 is provided with notch filter circuits 62 and 63 of 50 Hz and 60 Hz, respectively, and it is determined which one is connected according to the detection result of the frequency detection unit 56.

  For example, when the result of the frequency detection unit 56 is L, switching is performed to the filter circuit 62 for 50 Hz, and the result of the frequency detection unit 56 is H. In this case, the filter circuit 63 for 60 Hz is switched.

  FIG. 13: shows the block diagram of a structure of the lighting fixture sensor part with a human sensor concerning Example 4 of this invention. The present embodiment has the same configuration as that of the lighting device with a human sensor of the second embodiment, and the notch filter 28 is placed in front of the amplifier circuit 27 (between the millimeter wave sensor 11 and the amplifier circuit 27) in the block order of the sensor unit 13. Even if it arrange | positions, the same effect is acquired.

  Further, instead of the notch filter 28, as shown in FIG. 14, a high pass filter 42 and a low pass filter 41 in which a gain of an integer multiple of the power supply frequency (100 Hz or 120 Hz) is zero are connected in parallel. The same effect can be obtained by using a circuit that performs synthesis.

  As described above, according to the sensor-equipped lighting fixture according to the embodiment of the present invention, a filter that cuts a frequency band of an integral multiple (100 Hz or 120 Hz) of the operating frequency of the power supply is provided in the sensor circuit. Therefore, it is possible to avoid the noise that becomes a problem, and it is possible to detect human presence without erroneous detection. As a result, the sensor can be used in the vicinity of the light source.

  Since the operation of the target person is complicated and includes a plurality of frequency components, it is expected that the degradation of the detection performance due to the cutting of the frequency component that is an integral multiple of the power supply frequency is light.

  INDUSTRIAL APPLICABILITY The present invention can be used as a luminaire capable of detecting human feeling without being erroneously detected without being affected by noise due to the power supply frequency, and capable of attaching the sensor in the vicinity of the light source.

The sketch (a) and sectional drawing (b) which show the image of the lighting fixture with a human sensitive sensor concerning Example 1 of this invention The block block diagram of the lighting fixture with a human sensitive sensor concerning Example 1 of this invention. Configuration block diagram of a sensor unit of a lighting device with a human sensor according to Embodiment 1 of the present invention The figure which shows the amplification band of the amplifier circuits 16 and 17 concerning Example 1 of this invention, (a) BPF of the amplifier circuit 16, and (b) BPF of the amplifier circuit 17 Amplification band diagram after synthesis in Example 1 of the present invention The figure which shows the frequency band in Example 2 of this invention Example of notch filter circuit in Embodiment 3 of the present invention Block diagram of a configuration of a lighting fixture sensor unit with a human sensor according to a third embodiment of the present invention It is an example of the amplification zone | band by the power supply frequency in Example 3 of this invention, (a) For 50Hz and (b) 60Hz The figure which shows the filter structure which removes the frequency component of 2 times, 3 times, and 4 times the operating frequency of a power supply in Example 3 of this invention. The figure which shows the block structure of the lighting fixture with a human sensitive sensor provided with the determination circuit which performs the setting of the frequency which should be cut in Example 3 of this invention automatically The figure which shows the structure of the notch filter part 28 in Example 3 of this invention. Configuration block diagram of a luminaire sensor unit with human sensor according to Example 4 of the present invention Block diagram of an alternative circuit for the notch filter in Embodiment 3 of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Millimeter wave sensor 12 Fluorescent lamp 13 Sensor part 14 Control part 15 Light source 16, 17, 27 Amplifier circuit 18 Adder 19 Comparator circuit 21, 22, 26 Resistive element 23, 24, 25 Capacitance element 28, 31, 32, 33 Notch Filter 41 Low-pass filter 42 High-pass filter 51 Commercial power supply 52 Power supply block 53 Amplifier circuit part 54 Detection circuit part 55 Sensor control part 56 Frequency detection part 61 Relay type switch 62 50Hz filter 63 60Hz filter

Claims (5)

A lighting apparatus having a light source that is supplied with power from a power source to be turned on, a sensor unit that detects the presence of a person, and a control unit that controls lighting of the light source according to a signal from the sensor unit,
The sensor unit detects a human presence and generates a human detection signal, and a millimeter wave sensor,
And a filter circuit that removes a frequency that is an integral multiple of the operating frequency of the power source from the human detection signal generated by the millimeter wave sensor. The lighting apparatus according to claim 1,
The lighting apparatus, wherein the filter circuit removes a frequency twice the operating frequency of the power source. The lighting apparatus according to claim 2,
The filter circuit cuts a band from 100 Hz to 120 Hz. The lighting apparatus according to claim 2,
The filter circuit is a filter circuit for 50 Hz or a filter circuit for 60 Hz corresponding to a commercial power supply frequency,
A luminaire configured to be switched according to a power supply frequency in use. The lighting fixture according to claim 4,
A frequency detector for detecting the power supply frequency to be used;
A lighting apparatus comprising: a switch that switches between the 50 Hz filter circuit and the 60 Hz filter circuit according to a detection result in the frequency detection unit.

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