WO2004102168A1 - レインセンサ用の信号検出回路および信号検出方法 - Google Patents
レインセンサ用の信号検出回路および信号検出方法 Download PDFInfo
- Publication number
- WO2004102168A1 WO2004102168A1 PCT/JP2004/006758 JP2004006758W WO2004102168A1 WO 2004102168 A1 WO2004102168 A1 WO 2004102168A1 JP 2004006758 W JP2004006758 W JP 2004006758W WO 2004102168 A1 WO2004102168 A1 WO 2004102168A1
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- WO
- WIPO (PCT)
- Prior art keywords
- external light
- circuit
- light component
- signal
- voltage
- Prior art date
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- 238000001514 detection method Methods 0.000 title claims abstract description 53
- 238000006243 chemical reaction Methods 0.000 claims abstract description 72
- 230000009467 reduction Effects 0.000 claims abstract description 61
- 238000000034 method Methods 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims 2
- 230000001678 irradiating effect Effects 0.000 claims 1
- 238000012856 packing Methods 0.000 claims 1
- 238000000926 separation method Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 30
- 239000003990 capacitor Substances 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 230000003321 amplification Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S1/00—Cleaning of vehicles
- B60S1/02—Cleaning windscreens, windows or optical devices
- B60S1/04—Wipers or the like, e.g. scrapers
- B60S1/06—Wipers or the like, e.g. scrapers characterised by the drive
- B60S1/08—Wipers or the like, e.g. scrapers characterised by the drive electrically driven
- B60S1/0818—Wipers or the like, e.g. scrapers characterised by the drive electrically driven including control systems responsive to external conditions, e.g. by detection of moisture, dirt or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S1/00—Cleaning of vehicles
- B60S1/02—Cleaning windscreens, windows or optical devices
- B60S1/04—Wipers or the like, e.g. scrapers
- B60S1/06—Wipers or the like, e.g. scrapers characterised by the drive
- B60S1/08—Wipers or the like, e.g. scrapers characterised by the drive electrically driven
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/55—Specular reflectivity
- G01N21/552—Attenuated total reflection
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S1/00—Cleaning of vehicles
- B60S1/02—Cleaning windscreens, windows or optical devices
- B60S1/04—Wipers or the like, e.g. scrapers
- B60S1/06—Wipers or the like, e.g. scrapers characterised by the drive
- B60S1/08—Wipers or the like, e.g. scrapers characterised by the drive electrically driven
- B60S1/0818—Wipers or the like, e.g. scrapers characterised by the drive electrically driven including control systems responsive to external conditions, e.g. by detection of moisture, dirt or the like
- B60S1/0822—Wipers or the like, e.g. scrapers characterised by the drive electrically driven including control systems responsive to external conditions, e.g. by detection of moisture, dirt or the like characterized by the arrangement or type of detection means
- B60S1/0833—Optical rain sensor
Definitions
- the present invention relates to a signal detection circuit of a rain sensor which is a raindrop detection device for automatically controlling a wiper for removing raindrops on a windshield of a vehicle, and more particularly to a signal detection circuit provided with an external light component reduction circuit. .
- the present invention further relates to a method for reducing external light components in a rain sensor. Background technology
- the rain sensor illuminates a light emitting element such as a light emitting diode (LED) at a fixed period, irradiates the light from the light emitting element to a winsild (a ⁇ tip glass), and reflects the reflected light to a photo diode (a photo diode). (PD), etc., and the PD output signal (pulse signal) is taken into the outlet 3 to detect raindrops and the amount of deposited raindrops, and finally measure the rainfall level.
- a light emitting element such as a light emitting diode (LED) at a fixed period
- a winsild a ⁇ tip glass
- PD photo diode
- the PD output signal pulse signal
- FIG. 1 shows the signal detection mechanism of the rain sensor.
- the light 11 from the LED 10 passes through the lenses 1.2 and the prism 14 to form a glass
- the signal detection circuit for detecting the pulse signal output from the PD 20 includes an analog circuit and a microcomputer.
- the analog circuit 22 includes a current-voltage (I_V) conversion circuit 24, a bandpass filter / amplifier circuit 26, a peak hold circuit 30.
- the pulse signal obtained from the PD 20 is converted from a change in current value to a change in voltage value by an I-V conversion circuit 24.
- the noise component is removed and amplified by the Z-amplifier circuit 26.
- the peak of the amplified pulse signal is Circuit circuit 30. The retained peak value is sent to the microcomputer 32.
- the microcomputer 32 is provided with an AZD converter 34, and processes the digit value obtained from the AZD converter by software to obtain raindrop information. Judgment of the rainfall level from the raindrop information.
- the light received by the PD 20 is not only the reflected light from the LED 10 but also the light from the external environment, that is, the external light 13 as shown in FIG.
- the external light 13 as shown in FIG.
- About 90% of the light received by the PD is this extraneous light component.
- FIG. 4 shows the output waveform of the I-V conversion circuit 24 when there is a constant external light component. It can be seen that the PD pulse signal is superimposed on the constant external light component.
- the bias voltage level is a voltage level when the PD 20 is operated with a reverse bias.
- FIG. 5 shows the output waveform of the I-to-V conversion circuit 24 when there is a variable extraneous light component. It can be seen that the PD pulse signal is superimposed on the fluctuating external light component.
- the pulse signal output from the PD 20 rises in voltage due to the external light component. If the saturation voltage of the operational amplifier of the I-V conversion circuit 24 is exceeded, the signal component will be destroyed and the correct signal level will not be input to the AZD converter 34. Therefore, there is a problem that it is not possible to determine a correct rainfall level.
- the first method uses a visible light cut (absorption) prism for the prism 14 shown in FIG.
- this method has a problem in that the visible light cut (absorbing) prism also attenuates the reflected light from the LED, and the signal received by the PD is reduced.
- the second method for reducing the external light component is to cut off the external light component by increasing the number of reflections in the prism 14 to prevent the external light from directly entering the light receiving element.
- this method has a problem in that the size of the prism is increased, and therefore the size of the rain sensor body is increased. Disclosure of the invention
- an object of the present invention is to provide a signal detection circuit including an external light component reduction circuit that can reduce external light components by electrical processing without using the above-described conventional method.
- Still another object of the present invention is to provide a method for detecting a signal including a reduction in an external light component.
- a pulse light from a light emitting element is irradiated to a windshield of a vehicle, reflected light is received by a light receiving element, and a pulse signal from the light receiving element is received.
- a signal-detection circuit for processing and inputting the signal to an arithmetic processing unit, wherein the current-to-voltage conversion circuit for converting a pulse signal from the light-emitting element into a voltage signal and a current-to-voltage conversion circuit are provided in parallel with the current-to-voltage conversion circuit.
- the current-to-voltage conversion circuit for converting a pulse signal from the light-emitting element into a voltage signal and a current-to-voltage conversion circuit are provided in parallel with the current-to-voltage conversion circuit.
- a band-pass filter circuit that amplifies the output signal while reducing noise of the output signal of the current-to-voltage conversion circuit.
- a pulse light from a light emitting element is irradiated to a windshield of the vehicle, reflected light is received by a light receiving element, and a pulse signal from the light receiving element is processed.
- a signal detection method to be input to the arithmetic processing unit wherein the step of converting the pulse signal from the light emitting element into a voltage signal; and the step of reducing an external light component included in the converted voltage signal. Reducing the noise of the voltage signal and amplifying the voltage signal.
- the pulse light from the light emitting element is irradiated to the windshield of the vehicle, the reflected light is received by the light receiving element, and the pulse signal from the light receiving element is transmitted.
- This is an external light component reduction circuit that reduces external light components in a signal detection circuit that processes and inputs the processed signal to an arithmetic processing unit.
- an external light component reduction circuit in parallel with a current-voltage conversion circuit that converts a pulse signal from a light emitting element into a voltage signal, and includes an external light component included in an output signal of the current-to-voltage conversion circuit.
- This is an external light component reduction circuit that separates the frequency and feeds it back to the input side of the current-to-voltage conversion circuit.
- an external light component included in an output signal of the current-voltage conversion circuit is provided in parallel with a current-voltage conversion circuit that converts a pulse signal from a light emitting element into a voltage signal.
- This is an external light component reduction circuit that holds and feeds back to the input side of the current-to-voltage conversion circuit.
- FIG. 1 is a diagram showing a signal detection mechanism of the rain sensor.
- FIG. 2 is a diagram illustrating a conventional signal detection circuit.
- FIG. 3 is a diagram showing incidence of external light on the rain sensor.
- Figure 4 is a diagram showing the pulse signal waveform from the PD when there is a constant external light component.
- Fig. 5 is a diagram showing the pulse signal waveform from the PD when there is a fluctuating extraneous light component.
- Figure 6 shows the pulse signal waveform from the PD when there is a constant external light component.
- FIG. 7 is a block diagram showing a signal detection circuit using the external light component reduction circuit of the present invention.
- FIG. 8 is a block diagram illustrating a configuration of the external light component reduction circuit.
- FIG. 9 is a diagram illustrating a specific circuit configuration of the external light component reduction circuit.
- FIG. 10 is a specific circuit diagram of a signal detection circuit including the external light component reduction circuit shown in FIG.
- FIG. 11 is a diagram for explaining the operation of the external light component reduction circuit.
- FIG. 12 is a diagram showing the relationship between the band of the external light component and the signal pass band of the low-pass filter circuit.
- FIG. 13 is a block diagram showing another configuration of the external light component reduction circuit.
- FIG. 14 is a diagram illustrating a specific circuit configuration of the external light component reduction circuit.
- FIG. 15 is a specific circuit diagram of a signal circuit including the external light component reduction circuit shown in FIG.
- FIG. 16 is a diagram for explaining that the external light component voltage is captured when the switch circuit is turned on. .
- FIG. 17 is a diagram for explaining that the external light component voltage is not taken in when the switch circuit is turned off.
- FIG. 18 is a diagram showing the timing of the LED lighting drive pulse and the feed pack switch control signal.
- FIG. 19 is a diagram showing the effect of the external light component reduction circuit when the circuit is provided and when it is not provided.
- FIG. 20 is a diagram illustrating a state where the inclination of the extraneous light component is steep.
- Figure 21 shows the change when the switch element of the external light component reduction circuit is turned on and off.
- FIG. 4 is a diagram illustrating a relationship between a band of an extraneous light component and a signal passing band of an amplifying circuit of a bandpass filter circuit.
- FIG. 22 is a diagram showing a signal detection circuit to which a circuit for removing high-frequency noise due to a fluctuating external light component is further added.
- FIG. 23 is a diagram showing a band pass filter circuit in which a low-pass filter circuit is inserted and a pass band obtained by combining the amplifier circuits.
- FIG. 7 is a block diagram showing a first embodiment of a signal detection circuit including an analog circuit 40 using the external light component reduction circuit of the present invention.
- the external light component reduction circuit 42 is inserted in parallel with the I-V conversion circuit 24.
- FIG. 8 is a block diagram showing a configuration of the external light component reduction circuit 42.
- the external light component reduction circuit is composed of a low-pass filter circuit 44 and an external light component voltage-current (VI) conversion circuit 46.
- FIG. 9 shows a specific circuit configuration of the external light component reduction circuit.
- the external light component V-I conversion circuit 46 includes an operational amplifier 48 and a feedback resistor 50.
- the single-pass filter circuit 44 includes a capacitor 52 and a resistor 54.
- FIG. 10 is a specific circuit diagram of the signal detection circuit 60 including the external light component reduction circuit 42 shown in FIG.
- the switch element 62 is provided in the amplifying circuit 26, and the switch element 64 is also provided in the peak hold circuit 30. The on / off of these switch elements 62 and 64 is controlled by an LED lighting drive pulse described later.
- the operation of the switch element 62 of the band-pass filter circuit amplifier circuit 26 will be described.
- the pulse signal output from the I-V conversion circuit 24 is superimposed on the bias voltage.
- the high pass fill is connected to the ground.
- the slope component high-frequency component
- the output value may drop below ground, that is, become negative.
- the operational amplifier is destroyed.
- the output value is not applied to the operational amplifier 27.
- the switch element 64 of the peak hold circuit 30 functions to discharge the capacitor 29 by the capacitor in preparation for the next peak-hole operation.
- FIG. 11 is a diagram for explaining the outline of the operation.
- External light components are always fed back regardless of whether L ⁇ D is on or L LD is off.
- FIG. 12 shows the relationship between the frequency band of the external light component passed by the low-pass filter circuit 44 and the frequency band of the band-pass filter circuit passing the PD pulse signal.
- the figure also shows the PD pulse signal band.
- the vertical axis shows the intensity (V) of the signal component, and the horizontal axis shows the frequency (f).
- the signal component from the I-V conversion circuit 24 is sent to the band-pass filter circuit amplification circuit 26.
- the band 76 of the band-pass filter circuit amplifier circuit 26 covers the PD pulse signal band 72, so that noise is removed. After the noise has been removed, the signal is amplified by the band-pass filter / amplifier circuit 26, and the peak value is held by the peak hold circuit 30. The peak value is input to a microcomputer 32 A / D converter 34.
- the external light component reduction circuit By providing the external light component reduction circuit in this way, the constant external light component and the variable external light component can be reduced. Since the constant external light component is reduced, the output of the I-V converter does not saturate. In addition, since the extraneous light component is reduced, the SZN ratio can be improved.
- a second embodiment of a signal detection circuit including an analog circuit using an external light component reduction circuit different from the first embodiment will be described.
- FIG. 13 shows the configuration of the external light component reduction circuit 42 according to the present embodiment.
- the external light component reduction circuit 42 includes an external light component voltage holding circuit 45, an external light component VI conversion circuit 47, and a feedback switch circuit 43.
- FIG. 14 shows a specific circuit configuration of the external light component reduction circuit 42.
- the external light component V-I conversion circuit 47 includes an operational amplifier 51, a diode 53, and a feedback resistor 50.
- the external light component voltage holding circuit 45 includes a capacitor 55.
- the feedback switch circuit 43 includes an operational amplifier 57 and a feedback switch element 59.
- the operational amplifier 57 functions to prevent the switching noise of the switch element 59 from being applied to the output of the I-V conversion circuit 24. You.
- FIG. 15 is a specific circuit diagram of a signal detection circuit including the external light component reduction circuit 42 shown in FIG. The only difference from the circuit shown in Fig. 10 is the external light component reduction circuit 42.
- the V-I conversion circuit 24, the bandpass filter amplifier circuit 26, and the peak hold circuit 30 are the same as those in Fig. 10. Is the same as
- the on / off state of the switch element 59 of the external light component reduction circuit 42 is controlled by a feed-pack switch control signal described later.
- FIGS. 16 and 17 are diagrams for explaining whether or not the external light component voltage is captured by turning on and off the switch circuit 43.
- FIG. 18 is a diagram showing the timing of the LED lighting drive pulse and the feedback switch control signal.
- (A) shows the waveform of the LED drive pulse, and (b) shows the waveform of the feedback switch control signal.
- the drive pulse for LED lighting has a period of 500 S, ZO,. It shall have a luth width of 12.8 S.
- the LED 10 lights up when the drive pulse is at the H level, and goes off when the drive pulse is at the L level. Therefore, the pulse signal from PD 20 is output in response to the drive pulse of LED 10.
- the feedback switch control signal is at the L level for a period including the period before and after the LED lighting drive pulse is at the H level, and is at the H level during the other periods. .
- the previous period is 90 S and the later period is 60 S. These periods slightly vary due to the interrupt processing of the microcomputer 32.
- the feedback switch control signal turns on the feedback switch circuit 43 and turns off the capacitor 5 of the external light component voltage holding circuit 45.
- the external light component voltage is held.
- the held external light component voltage is the external light component V—I
- the current is converted by the conversion circuit 47 and fed back to the input side of the I-V conversion circuit 24. Since the reflected external light component current flows in the opposite direction to the pulse signal current from the PD, only the reduced external light component current is input to the input of the I-V conversion circuit 24.
- the feedback switch control signal 43 turns off the feedback switch control signal, and the I-V conversion circuit 24 outputs the signal. No signal components are captured. This is because the signal components must not be fed back.
- the external light component voltage is held in the capacitor 55 of the external light component voltage holding circuit 45. During this time, the external light component is fed back. Therefore, (reduced external light component) + (signal component) is input to the I-V conversion circuit 24.
- Figure 19 compares the effect of the external light component reduction circuit with and without the circuit.
- the figure on the left side of Figure 19 shows the output signal waveform of the I-V converter circuit 24 when there is an external light component and there is no external light component reduction circuit.
- the figure on the right side shows that there is an external light component and the external light component is reduced.
- the output signal waveform of the I-to-V conversion circuit 24 when there is a circuit is shown.
- the saturation voltage of the operational amplifier of the I-V conversion circuit 24 exceeds the saturation voltage due to the voltage rise due to the external light component, the signal component is crushed.
- the external light component reduction circuit When the external light component reduction circuit is provided, it can be seen that as a result of the reduced external light component, the signal component falls within the saturation voltage of the operational amplifier and the signal component does not collapse.
- the above is the case where the external light component is an almost constant external light component.
- the external light component may include not only a constant external light component but also a fluctuating external light component whose light intensity fluctuates.
- Fig. 21 shows the relationship between the band of the fluctuating external light component in the ON / OFF state of the switch element 59 of the external light component reduction circuit 42 and the signal pass band of the pan pass filter circuit z amplifier circuit 26.
- the diagram showing the relationship also shows the PD pulse signal band.
- the vertical axis shows the intensity (V) of the signal component, and the horizontal axis shows the frequency (f).
- a circuit that removes high-frequency noise due to such fluctuating extraneous light components, and a signal detection circuit that has been added are shown in Fig. 22 and a fluctuating extraneous noise reduction circuit 80 shown in Fig. 22 is used.
- the noise reduction circuit 80 having a structure provided in the signal path of the circuit / amplification circuit 26 has a configuration in which two stages of D-pass filter circuits are connected. When such a pass-fill circuit is inserted into the band-pass filter / amplifier circuit 26, the combined pass band becomes equivalent as shown in Fig. 23.
- the external light component reduction circuit is provided in the signal detection circuit of the Rayn sensor, the output of the I-V conversion circuit due to the external light component is prevented from being saturated, and noise due to the external light component is reduced. Can be reduced Since accurate signals can be input to the microcomputer, it is possible to determine rainfall levels more accurately.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/556,828 US7507982B2 (en) | 2003-05-15 | 2004-05-13 | Rain sensor with ambient light compensation |
EP04732802A EP1640705A1 (en) | 2003-05-15 | 2004-05-13 | Signal detection circuit and signal detection method for rain sensor |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003136906A JP2004340712A (ja) | 2003-05-15 | 2003-05-15 | レインセンサ用の信号検出回路および信号検出方法 |
JP2003-136906 | 2003-05-15 | ||
JP2003136866A JP2004340708A (ja) | 2003-05-15 | 2003-05-15 | レインセンサ用の信号検出回路および信号検出方法 |
JP2003-136866 | 2003-05-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004102168A1 true WO2004102168A1 (ja) | 2004-11-25 |
Family
ID=33455470
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/006758 WO2004102168A1 (ja) | 2003-05-15 | 2004-05-13 | レインセンサ用の信号検出回路および信号検出方法 |
Country Status (4)
Country | Link |
---|---|
US (1) | US7507982B2 (ja) |
EP (1) | EP1640705A1 (ja) |
KR (1) | KR20060015608A (ja) |
WO (1) | WO2004102168A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102317745A (zh) * | 2008-01-07 | 2012-01-11 | 立维腾制造有限公司 | 数字占用传感器照明控制 |
CN103471726A (zh) * | 2013-08-28 | 2013-12-25 | 西安应用光学研究所 | 飞焦级纳秒脉冲激光能量探测装置 |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4364764B2 (ja) * | 2004-09-30 | 2009-11-18 | 株式会社東海理化電機製作所 | 電動ステアリングロック装置 |
TW201134386A (en) * | 2010-04-09 | 2011-10-16 | Tung-Teh Lee | Automatic water-supply control device |
JP5832802B2 (ja) * | 2011-07-19 | 2015-12-16 | 株式会社ヴァレオジャパン | 状態検出装置 |
JP5940388B2 (ja) * | 2012-06-22 | 2016-06-29 | 株式会社ヴァレオジャパン | 雨滴検出装置 |
CN103273906B (zh) * | 2013-06-19 | 2016-03-16 | 北京经纬恒润科技有限公司 | 一种感雨信号调整方法、装置和车载智能雨刮系统 |
CN104316172B (zh) * | 2014-10-09 | 2016-09-21 | 中国科学院上海光学精密机械研究所 | 用于光刻机的能量探测装置 |
KR101671400B1 (ko) * | 2015-03-18 | 2016-11-02 | 주식회사 지파랑 | 포지티브 피드백을 이용한 센싱 시스템 |
CN105842170A (zh) * | 2016-05-12 | 2016-08-10 | 安徽国能亿盛环保科技有限公司 | 一种污水水质在线监测系统 |
JP2018017546A (ja) * | 2016-07-26 | 2018-02-01 | 株式会社デンソー | レインセンサ |
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JPH0647767Y2 (ja) | 1987-07-28 | 1994-12-07 | 富士重工業株式会社 | 樹脂製燃料タンク |
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-
2004
- 2004-05-13 US US10/556,828 patent/US7507982B2/en not_active Expired - Fee Related
- 2004-05-13 WO PCT/JP2004/006758 patent/WO2004102168A1/ja active Application Filing
- 2004-05-13 EP EP04732802A patent/EP1640705A1/en not_active Withdrawn
- 2004-05-13 KR KR1020057021792A patent/KR20060015608A/ko not_active Application Discontinuation
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN102317745A (zh) * | 2008-01-07 | 2012-01-11 | 立维腾制造有限公司 | 数字占用传感器照明控制 |
CN103471726A (zh) * | 2013-08-28 | 2013-12-25 | 西安应用光学研究所 | 飞焦级纳秒脉冲激光能量探测装置 |
Also Published As
Publication number | Publication date |
---|---|
EP1640705A1 (en) | 2006-03-29 |
KR20060015608A (ko) | 2006-02-17 |
US7507982B2 (en) | 2009-03-24 |
US20070138868A1 (en) | 2007-06-21 |
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