CN203037271U - Intelligent background inhibition photoelectric sensor - Google Patents
Intelligent background inhibition photoelectric sensor Download PDFInfo
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- CN203037271U CN203037271U CN 201220635912 CN201220635912U CN203037271U CN 203037271 U CN203037271 U CN 203037271U CN 201220635912 CN201220635912 CN 201220635912 CN 201220635912 U CN201220635912 U CN 201220635912U CN 203037271 U CN203037271 U CN 203037271U
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Abstract
An intelligent background inhibition photoelectric sensor relates to the technical field of a photoelectric sensor. An LED emission tube is disposed at one side of an emission lens of the sensor. An anode of the LED emission tube is connected with a power source, and a cathode of the LED emission tube is connected with one end of a first phase and assignment controllable current source. An A phase of the first phase and assignment controllable current source is connected with one end of a clock source, and the other end of the clock source is connected with a B phase of a second phase and assignment controllable current source. An IO end of the second phase and assignment controllable current source is respectively connected with a signal conditioning circuit and an amplitude comparator, one end of the second phase and assignment controllable current source is connected with a cathode of an LED compensation emission tube, and an anode of the LED compensation emission tube is connected with the power source. According to the intelligent background inhibition photoelectric sensor, strong light can be inhibited, emission current strength of different levels can be set based on a distance of a target object during a distance setting process, and distance attenuation is minimized when an object that is far and is low in reflecting rate is detected by the sensor.
Description
Technical field:
The utility model relates to the photoelectric sensor technical field, is specifically related to intelligent background and suppresses photoelectric sensor.
Background technology:
The background suppression type photoelectric sensor, testing result only with detect distance dependent, and it is irrelevant with color of object surface and reflecting rate, go for detecting the dark-coloured objective body of bright color background surface, because the color of target detection thing is different with reflecting rate, select for use the conventional diffuse reflection type sensor can't reliable detection in a lot of occasions.
Existing background suppresses optical sensor on the market, and following two kinds of design proposals are arranged:
First kind is to adopt mechanical type to regulate receiver lens, receiving device is the double reception photodiode, its ultimate principle is: receiver is divided into remote area and proximal end region, different far and near objective body reflected back light in the intensity in far and near zone with difference, when the proximal end region receiving light power greater than far-end, for detecting objective body, could change the detection distance by regulating receiver lens.This scheme can't realize the automatic setting of distance, uses inconvenience.
Another is that electronic type is regulated, adopt position transducer PSD to realize that this scheme can realize the automatic adjusting of distance in theory, but circuit realize that cost is too high, can't be applied in sensor field, therefore the sensor distance adjusting of existing this scheme of use still is to adopt the potentiometer mode.
As shown in Figure 1, existing background suppresses photoelectric sensor by firing pulse generator 1, transmitter 2, detected material 3, the positional information that PSD position transducer 4 will receive luminous point converts two-way current signal I1 and I2 to, two-way pre-amplification circuit 5 realizes that electric current changes voltage and carries out the signal amplification, the synchronous analog to digital conversion circuit 6 of binary channels is realized the synchronous collection of signal by the ADC passage of CH1 and CH2, be translated into digital quantity, SPI serial data collection interface 7 sends digital quantity signal to MCU, 8 pairs of data-signals of the little process chip of MCU carry out calculation process, opener electrode output circuit 9 output measuring-signals.
There is following shortcoming in sum: one, higher to installing and using environmental requirement.The power of surround lighting can directly influence receiver sensitivity, and surround lighting is crossed the testing result that can influence sensor by force, uses below 5000Lux usually; When the surround lighting sun that changes, sensor need be calibrated;
Two, distance adjustment need be used potentiometer, and signal amplifies front end to be placed potentiometer and can introduce noise, product be the decline of shell protection grade, and can't satisfy the regulatory demand of intellectualizing system;
Three, transmitter current intensity mostly is fixed value, when detecting distant objects, because the object to be detected reflected signal is very faint, making sensor detect stability weakens, objective body to low reflecting rate, for example reflecting rate is that 6% black objects health check-up is surveyed the inspection result certain decay is arranged, and black and white colour sensitivity attenuation range is between 10% to 30% usually.
The utility model content:
The purpose of this utility model provides a kind of intelligent background and suppresses photoelectric sensor, it can resist high light to disturb, can be according to the distance of object when distance is set, set different transmitter current intensity, and having reduced the range attenuation of sensor when detection is hanged down the reflecting rate object at a distance, the black and white colour sensitivity decays＜10%.
In order to solve the existing problem of background technology, the utility model is to adopt following technical scheme: it comprises diversing lens 11, first phase place and assignment controllable current source 12, clock source 13, second phase place and assignment controllable current source 14, magnitude comparator 15, pre-amplification circuit 16, lightguide 17, PSD position transducer 18, receiver lens 19, LED power valve S, LED compensate for emission pipe C, one side of diversing lens 11 is provided with LED power valve S, the positive pole of LED power valve S connects power supply, the negative pole of LED power valve S is connected with an end of first phase place and assignment controllable current source 1, the A of first phase place and assignment controllable current source 1 is connected with an end in clock source 13, the other end in clock source 13 is connected with the B of second phase place and assignment controllable current source 14, the IO of second phase place and assignment controllable current source 14 end respectively with signal conditioning circuit, magnitude comparator 15 connects, one end of second phase place and assignment controllable current source 14 is connected with the negative pole of LED compensate for emission pipe C, the positive pole of LED compensate for emission pipe C is connected with power supply, LED compensate for emission pipe C matches with lightguide 17, one side of lightguide 17 is provided with PSD position transducer 18, one side of PSD position transducer 18 is provided with receiver lens 19, the I1 pin of PSD position transducer 18, the I2 pin is connected with pre-amplification circuit 16 respectively.
The utility model since the destruction source of the dynamic balancing state that compensates of system's self-correcting mechanism from all influences in the environment, the displacement information that has not only comprised testee, all destroy the influence of dynamically balanced factor also to have comprised surround lighting, temperature variation etc., therefore, system possesses extremely strong anti-interference.
The utility model has realized that background suppresses the intellectuality of photoelectric sensor, except the above-mentioned function of setting, self-correcting etc. certainly, also possesses communication function, can send master system to by communication interface with detecting data, make sensor go for the occasion that site environment is abominable and need regulate, and intelligent control system, need obtain sensor information in real time, and sensor parameters is regulated, and the signal conditioning circuit cost only is 20% of former scheme in addition, and the market sight is huge.
The utility model has following beneficial effect: one, anti-high light disturbs, and sensor can be used in the occasion of ambient light intensity as 200000Lux, has thoroughly solved existing background and has suppressed photoelectric sensor and can't be suitable for shortcoming with the high light environment; (daylight environment: say in the outdoor summer illumination is 200000Lux under the fine high light);
Two, changed traditional background inhibition photoelectric sensor and must rely on potentiometer to carry out distance adjustment, had intelligent from setting, self-correcting function;
Three, sensor can be according to the distance of object when distance is set, set different transmitter current intensity, remedy existing sensor design defect in this regard, and reduced the range attenuation of sensor when detection is hanged down the reflecting rate object at a distance, black and white colour sensitivity decay＜10%.
Description of drawings:
Fig. 1 is the structural representation of background technology,
Fig. 2 is structural representation of the present utility model,
Fig. 3 is the optical triangulation range measurement principle figure of emission light path in this embodiment,
Fig. 4 is applied to the synoptic diagram of PSD device signal conditioning for this embodiment.
Embodiment:
Referring to Fig. 2, this embodiment adopts following technical scheme: it comprises diversing lens 11, first phase place and assignment controllable current source 12, clock source 13, second phase place and assignment controllable current source 14, magnitude comparator 15, pre-amplification circuit 16, lightguide 17, PSD position transducer 18, receiver lens 19, LED power valve S, LED compensate for emission pipe C, one side of diversing lens 11 is provided with LED power valve S, the positive pole of LED power valve S connects power supply, the negative pole of LED power valve S is connected with an end of first phase place and assignment controllable current source 1, the A of first phase place and assignment controllable current source 1 is connected with an end in clock source 13, the other end in clock source 13 is connected with the B of second phase place and assignment controllable current source 14, the IO of second phase place and assignment controllable current source 14 end respectively with signal conditioning circuit, magnitude comparator 15 connects, one end of second phase place and assignment controllable current source 14 is connected with the negative pole of LED compensate for emission pipe C, the positive pole of LED compensate for emission pipe C is connected with power supply, LED compensate for emission pipe C matches with lightguide 17, one side of lightguide 17 is provided with PSD position transducer 18, one side of PSD position transducer 18 is provided with receiver lens 19, the I1 pin of PSD position transducer 18, the I2 pin is connected with pre-amplification circuit 16 respectively.
Referring to Fig. 3, if emission light is blocked by testee 21, reflex to the remote location of PSD, if light is blocked by testee 22, reflex to the center of leaning on of PSD, if light is blocked by testee 23, reflex to the proximal location of PSD, according to the detection principle of PSD device to facula position, sensor can detect the distance of testee, and the color shape of its testing result and object etc. are irrelevant, can realize the background inhibit feature.
Referring to Fig. 4, this embodiment has following characteristics: one, increased the compensate for emission pipe newly, the compensate for emission pipe is by the driven with current sources conducting, it is one group of pulse anti-phase with source power valve control signal, the phase phasic difference is 180 ° each other, when LED power valve S conducting, PSD receives the signal by the object reflection, when LED compensate for emission pipe C conducting, what PSD received is the compensating signal that conducts through lightguide, and signal compares twice amplitude through after receiving preposition amplification, HALIOS system design key is the stack by amplitude signal, makes the signal after the stack reach dynamic balancing state.When causing dynamic balancing state to be destroyed from the signal of outside and interference, system constantly regulates the compensate for emission electric current from normal moveout correction, receives the power of signal I1 and I2 according to the PSD that how much judges of compensation rate:
Two, implementation procedure need be carried out time-division processing to signal, uses two or more Loop, and each Loop refers to that to a multiple-pulse sense cycle I1 enters the AN end, carries out data and obtain in Loop1, and I2 enters the KA end, carries out data and obtain in Loop2.
This embodiment since the destruction source of the dynamic balancing state that compensates of system's self-correcting mechanism from all influences in the environment, the displacement information that has not only comprised testee, all destroy the influence of dynamically balanced factor also to have comprised surround lighting, temperature variation etc., therefore, system possesses extremely strong anti-interference.
This embodiment has realized that background suppresses the intellectuality of photoelectric sensor, except the above-mentioned function of setting, self-correcting etc. certainly, also possesses communication function, can send master system to by communication interface with detecting data, make sensor go for the occasion that site environment is abominable and need regulate, and intelligent control system, need obtain sensor information in real time, and sensor parameters is regulated, the signal conditioning circuit cost only is 20% of former scheme in addition, and the market sight is huge.
This embodiment has following beneficial effect: one, anti-high light disturbs, and sensor can be used in the occasion of ambient light intensity as 200000Lux, has thoroughly solved existing background and has suppressed photoelectric sensor and can't be suitable for shortcoming with the high light environment; (daylight environment: illumination is 200000Lux under the fine high light in summer of open air);
Two, changed traditional background inhibition photoelectric sensor and must rely on potentiometer to carry out distance adjustment, had intelligent from setting, self-correcting function;
Three, sensor can be according to the distance of object when distance is set, set different transmitter current intensity, remedy existing sensor design defect in this regard, and reduced the range attenuation of sensor when detection is hanged down the reflecting rate object at a distance, black and white colour sensitivity decay＜10%.
Claims (1)
1. intelligent background suppresses photoelectric sensor, it is characterized in that it comprises diversing lens (11), first phase place and assignment controllable current source (12), clock source (13), second phase place and assignment controllable current source (14), magnitude comparator (15), pre-amplification circuit (16), lightguide (17), PSD position transducer (18), receiver lens (19), LED power valve (S), LED compensate for emission pipe (C), one side of diversing lens (11) is provided with LED power valve (S), the positive pole of LED power valve (S) connects power supply, the negative pole of LED power valve (S) is connected with an end of first phase place and assignment controllable current source (1), the A of first phase place and assignment controllable current source (1) is connected with an end of clock source (13), the other end in clock source (13) is connected with the B of second phase place and assignment controllable current source (14), 10 ends of second phase place and assignment controllable current source (14) respectively with signal conditioning circuit, magnitude comparator (15) connects, one end of second phase place and assignment controllable current source (14) is connected with the negative pole of LED compensate for emission pipe (C), the positive pole of LED compensate for emission pipe (C) is connected with power supply, LED compensate for emission pipe (C) matches with lightguide (17), one side of lightguide (17) is provided with PSD position transducer (18), one side of PSD position transducer (18) is provided with receiver lens (19), 11 pin of PSD position transducer (18), the I2 pin is connected with pre-amplification circuit (16) respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220635912 CN203037271U (en) | 2012-11-28 | 2012-11-28 | Intelligent background inhibition photoelectric sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220635912 CN203037271U (en) | 2012-11-28 | 2012-11-28 | Intelligent background inhibition photoelectric sensor |
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| CN203037271U true CN203037271U (en) | 2013-07-03 |
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| CN 201220635912 Expired - Fee Related CN203037271U (en) | 2012-11-28 | 2012-11-28 | Intelligent background inhibition photoelectric sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411634A (en) * | 2012-11-28 | 2013-11-27 | 上海兰宝传感科技股份有限公司 | Intelligent background suppression photoelectric sensor |
| CN107543565A (en) * | 2016-06-24 | 2018-01-05 | 卡西欧计算机株式会社 | Photo Interrupter, optical sensor and drive actions detection means |
-
2012
- 2012-11-28 CN CN 201220635912 patent/CN203037271U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411634A (en) * | 2012-11-28 | 2013-11-27 | 上海兰宝传感科技股份有限公司 | Intelligent background suppression photoelectric sensor |
| CN107543565A (en) * | 2016-06-24 | 2018-01-05 | 卡西欧计算机株式会社 | Photo Interrupter, optical sensor and drive actions detection means |
| CN107543565B (en) * | 2016-06-24 | 2020-02-18 | 卡西欧计算机株式会社 | Photo interrupter, photo sensor, and driving operation detecting device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130703 Termination date: 20201128 |