CN201666952U - Photoelectric sensing device - Google Patents
Photoelectric sensing device Download PDFInfo
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- CN201666952U CN201666952U CN2009202360951U CN200920236095U CN201666952U CN 201666952 U CN201666952 U CN 201666952U CN 2009202360951 U CN2009202360951 U CN 2009202360951U CN 200920236095 U CN200920236095 U CN 200920236095U CN 201666952 U CN201666952 U CN 201666952U
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Abstract
The utility model provides a photoelectric sensing device comprising an infrared emission photodiode, an infrared receiving photosensitive diode, a filter circuit, a voltage-current conversion circuit, a shaping circuit, a pulse amplifying circuit, a singlechip, an LC oscillator switch control circuit, a pulse output circuit and a photoelectric switch, wherein the infrared emission photodiode emits the pulse infrared signal; the infrared receiving photosensitive diode receives the pulse infrared signal returned by the object to be measured and outputs the electric signal; the singlechip is provided with a microprocessor, and the electric signal is output to the microprocessor through the filter circuit, the voltage-current conversion circuit, the shaping circuit and the pulse amplifying circuit; the output of the LC oscillator switch control circuit is connected with the microprocessor; the input of the pulse output circuit is connected with the microprocessor, and the output thereof is connected with the infrared emission photodiode; and the input of the photoelectric switch is connected with the microprocessor. The utility model has the advantages that the detection distance can be freely adjusted in the specified range, and the adjustment of a switching point is accurate and is free of environmental interference.
Description
Technical field
The utility model relates to a kind of photoelectric monitor instrument, especially can precisely detect the photoelectric sensing apparatus of distance.
Background technology
In existing photoelectric detecting technology, have much for the method for the detection of object, comprising: 1, inductance type switch, the loss that it utilizes vortex current comes inspected object, can only detect metallic objects; 2, capacitance-type switch is to utilize specific inductive capacity to come inspected object, but undesirable for the little object detection effect of some specific inductive capacity, and the distance of the two detection is generally all nearer; Photoelectric sensor can finely address the above problem but photoelectric sensor detects the difficult adjusting of distance, may produce misoperation to other object on every side, some photoelectric sensor is to come adjustable range by the angle of regulating refracting telescope, some is to come adjustable range by potentiometer, and these modes are operated trouble.And some is that to utilize comparer to come positioning switch to put such precision not high enough.
The utility model content
The purpose of this utility model is to provide a kind of simple to operate and accurate photoelectric sensing apparatus of positioning switch point.
For reaching above-mentioned purpose, the utility model proposes a kind of photoelectric sensing apparatus, comprise the infrared emission photodiode that has diversing lens, the infrared reception photodiode that has receiver lens, filtering circuit, voltage-current converter circuit, shaping circuit, pulse amplifying circuit, single-chip microcomputer, LC oscillation switch control circuit, impulse output circuit and optoelectronic switch.The infrared emission photodiode that has diversing lens sends the pulsed infrared light signal; The infrared reception photodiode that has receiver lens receives testee and returns next pulsed infrared light signal, and the output electric signal; Single-chip microcomputer has microprocessor, and above-said current signal is passed through above-mentioned filtering circuit, voltage-current converter circuit, shaping circuit and pulse amplifying circuit successively, inputs to microprocessor at last; The output of LC oscillation switch control circuit is connected to above-mentioned microprocessor; The input of impulse output circuit is connected to above-mentioned microprocessor, and output connects the above-mentioned infrared emission photodiode that has diversing lens; The input of optoelectronic switch is connected to above-mentioned microprocessor.
In the utility model, also comprise short-circuit detecting circuit, its input end connects the output of optoelectronic switch, and output terminal is connected to above-mentioned microprocessor.
In the utility model, single-chip microcomputer also comprises analog/digital converter and EEPROM (Electrically Erasable Programmable Read Only Memo), the output end signal of pulse amplifying circuit imports the input end of A, D converter into, and the output terminal of A, D converter connects microprocessor, and EEPROM (Electrically Erasable Programmable Read Only Memo) connects microprocessor.
In the utility model, the oscillation frequency of LC oscillation switch control circuit is 230KHZ-320KHZ.
In sum, compared with prior art, the beneficial effects of the utility model comprise:
1, detecting distance can regulate arbitrarily in specialized range;
2, product is judged precisely switching point, and is not subjected to the interference of other objects of environment.
Description of drawings
Fig. 1 is the theory diagram of the utility model embodiment.
Embodiment
For above-mentioned and other purpose, feature and advantage of the present utility model can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Fig. 1 is the theory diagram of the utility model embodiment.As shown in Figure 1, photoelectric sensing apparatus comprises the infrared emission photodiode 11 that has diversing lens, the infrared reception photodiode 12 that has receiver lens, filtering circuit 13, voltage-current converter circuit 14, shaping circuit 15, pulse amplifying circuit 16, single-chip microcomputer 17, LC oscillation switch control circuit 18, impulse output circuit 19 and optoelectronic switch 20.The infrared emission photodiode 11 that has diversing lens sends the pulsed infrared light signal; The infrared reception photodiode 12 that has receiver lens receives the testee (not shown) and returns next pulsed infrared light signal, and the output electric signal; Single-chip microcomputer 17 has microprocessor 171, and above-said current signal is passed through above-mentioned filtering circuit 13, voltage-current converter circuit 14, shaping circuit 15 and pulse amplifying circuit 16 successively, inputs to microprocessor 171 at last; 18 its outputs of LC oscillation switch control circuit are connected to above-mentioned microprocessor 171; The input of impulse output circuit 19 is connected to above-mentioned microprocessor 171, and output connects the above-mentioned infrared emission photodiode 11 that has diversing lens; The output of optoelectronic switch 20 is connected to above-mentioned microprocessor 171.
In the utility model, single-chip microcomputer 17 also comprises analog/digital converter 172 (A/D converter) and EEPROM (Electrically Erasable Programmable Read Only Memo) 173 (EEPROM), 19 output end signals of pulse amplifying circuit import the input end of A/D converter 172 into, the output terminal of A/D converter 172 connects microprocessor, and EEPROM173 connects microprocessor.
In the utility model, the oscillation frequency of LC oscillation switch control circuit 18 is 230KHZ-320KHZ.
In the utility model, also comprise short-circuit detecting circuit 21, its input end connects the output of optoelectronic switch 20, and output terminal is connected to above-mentioned microprocessor 171.
During concrete the use, the light signal strength of the reflected back when this object that the intensity of being calculated the light signal that object reflects by A/D converter and prior learning are good is placed on switching point is compared, and judges whether the output of switching value.The optional surge frequency range of LC oscillation switch is 230KHZ-320KHZ during described switch.Microprocessor 171 connects led display units, and there is a LED that indication is double-colored this unit, the inside has red, green two lamps, and the energising green light is bright, and it is bright at the interior red light of switching point distance to detect object.The output of described optoelectronic switch 20 also connects short-circuit detecting circuit 21, and the output signal of this circuit is imported microprocessor into, and this testing circuit is existing ripe circuit, does not describe at this.
The light pulse of infrared emission photodiode 11 emissions of diversing lens is arranged, after the testee reflection, to the infrared reception photodiode 12 of receiver lens.The infrared reception photodiode 12 of receiver lens is converted into electric signal is delivered to single-chip microcomputer 17 through filtering, shaping, amplification microprocessor 171 to light signal.Microprocessor 171 has judged whether object according to the mean value of the pulse strength that receives within a certain period of time.Voltage-current converter circuit 14, shaping circuit 15, pulse amplifying circuit 16 are existing mature technologies, just do not explain at this.
Square being directly proportional of decay that diffuses and transmission range utilized this principle, for same radiation body, by the A/D transforming numerical that relatively receives just can judgment object whether in specialized range.
During use, good in certain stationkeeping with nut optoelectronic switch, it is not rocked, then energising (24V).When using for the first time, testee is placed on the switching point place that will establish apart from photoelectric sensing apparatus, with the close inductive head 3-5S of metal, just enter learning state switching point distance (2-3S is probably dodged in the red light fast blink during study) promptly is set, microprocessor 171 is just noted the value of the switching point that will set like this, just withdraws from learning state when red light does not glimmer.
Optoelectronic switch after the study just can operate as normal.Red light will be bright when the switching point distance is interior when it detects object, and optoelectronic switch will be opened, and this product per second can detect 250 products.
Reference table 1 after start, enters duty 0, and induction 3-5S is laggard to go into study state 1, red light quickflashing during study when optoelectronic switch 20 has.Study finishes red light and finishes flicker, the distance setting success.
Table 1 is a menu of the present utility model
| State | Function | Remarks |
| 0? | Normal mode of operation | Green light Chang Liang, the red light indication detects object |
| 1? | Mode of learning | The red light fast blink has been learnt the back red light and has been stopped flashing |
In sum, detection distance of the present utility model can be regulated arbitrarily in specialized range, and switching point is judged precisely, is not subjected to the interference of other objects of environment.
Concrete case study on implementation only is a preferable case study on implementation of the present utility model described in the utility model, is not to be used for limiting practical range of the present utility model.Be that all equivalences of doing according to the content of the utility model claim change and modification, all should be as technology category of the present utility model.
Claims (4)
1. a photoelectric sensing apparatus is characterized in that, comprising:
Have the infrared emission photodiode of diversing lens, send the pulsed infrared light signal;
The infrared reception photodiode that has receiver lens receives testee and returns next pulsed infrared light signal, and the output electric signal;
Filtering circuit;
Voltage-current converter circuit;
Shaping circuit;
Pulse amplifying circuit;
Single-chip microcomputer has microprocessor, and above-said current signal is passed through above-mentioned filtering circuit, voltage-current converter circuit, shaping circuit and pulse amplifying circuit successively, inputs to microprocessor at last;
LC oscillation switch control circuit, its output is connected to above-mentioned microprocessor;
Impulse output circuit, its input is connected to above-mentioned microprocessor, and output connects the above-mentioned infrared emission photodiode that has diversing lens;
Optoelectronic switch, its input is connected to above-mentioned microprocessor.
2. photoelectric sensing apparatus according to claim 1 is characterized in that, wherein also comprises short-circuit detecting circuit, and its input end connects the output of optoelectronic switch, and output terminal is connected to above-mentioned microprocessor.
3. photoelectric sensing apparatus according to claim 1 and 2, it is characterized in that, wherein single-chip microcomputer also comprises analog/digital converter and EEPROM (Electrically Erasable Programmable Read Only Memo), the output end signal of pulse amplifying circuit import into A the input end of D converter, A the output terminal of D converter connect microprocessor, EEPROM (Electrically Erasable Programmable Read Only Memo) connects microprocessor.
4. photoelectric sensing apparatus according to claim 1 and 2 is characterized in that, wherein the oscillation frequency of LC oscillation switch control circuit is 230KHZ-320KHZ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202360951U CN201666952U (en) | 2009-09-23 | 2009-09-23 | Photoelectric sensing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202360951U CN201666952U (en) | 2009-09-23 | 2009-09-23 | Photoelectric sensing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201666952U true CN201666952U (en) | 2010-12-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202360951U Expired - Fee Related CN201666952U (en) | 2009-09-23 | 2009-09-23 | Photoelectric sensing device |
Country Status (1)
| Country | Link |
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| CN (1) | CN201666952U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360252A (en) * | 2011-10-17 | 2012-02-22 | 东莞华中科技大学制造工程研究院 | Photoelectric sensing device and implementation method thereof |
| CN107019429A (en) * | 2017-03-13 | 2017-08-08 | 苏州咖博士咖啡系统科技有限公司 | A kind of coffee machine coffee bean lacks beans detection means |
| CN108055720A (en) * | 2017-11-28 | 2018-05-18 | 深圳还是威健康科技有限公司 | Biosensor circuit and intelligent wearable device |
| CN108061733A (en) * | 2017-02-16 | 2018-05-22 | 上海登宏机电制造有限公司 | Photo-electric broken yarn inductor |
| CN108132258A (en) * | 2018-01-25 | 2018-06-08 | 宁波水表股份有限公司 | A kind of optical lens pollution level detection device and detection method |
| CN117169901A (en) * | 2023-08-31 | 2023-12-05 | 深圳市华怡丰科技有限公司 | Detection method and photoelectric sensor |
-
2009
- 2009-09-23 CN CN2009202360951U patent/CN201666952U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360252A (en) * | 2011-10-17 | 2012-02-22 | 东莞华中科技大学制造工程研究院 | Photoelectric sensing device and implementation method thereof |
| CN102360252B (en) * | 2011-10-17 | 2015-01-14 | 东莞华中科技大学制造工程研究院 | Photoelectric sensing device and implementation method thereof |
| CN108061733A (en) * | 2017-02-16 | 2018-05-22 | 上海登宏机电制造有限公司 | Photo-electric broken yarn inductor |
| CN107019429A (en) * | 2017-03-13 | 2017-08-08 | 苏州咖博士咖啡系统科技有限公司 | A kind of coffee machine coffee bean lacks beans detection means |
| CN108055720A (en) * | 2017-11-28 | 2018-05-18 | 深圳还是威健康科技有限公司 | Biosensor circuit and intelligent wearable device |
| CN108132258A (en) * | 2018-01-25 | 2018-06-08 | 宁波水表股份有限公司 | A kind of optical lens pollution level detection device and detection method |
| CN117169901A (en) * | 2023-08-31 | 2023-12-05 | 深圳市华怡丰科技有限公司 | Detection method and photoelectric sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101208 Termination date: 20130923 |