CN2253545Y - Approach-type reflective photoelectric switch - Google Patents
Approach-type reflective photoelectric switch Download PDFInfo
- Publication number
- CN2253545Y CN2253545Y CN 95240855 CN95240855U CN2253545Y CN 2253545 Y CN2253545 Y CN 2253545Y CN 95240855 CN95240855 CN 95240855 CN 95240855 U CN95240855 U CN 95240855U CN 2253545 Y CN2253545 Y CN 2253545Y
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- China
- Prior art keywords
- lens
- correlator
- light
- switch
- utility
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- Expired - Fee Related
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Abstract
The utility model relates to the electronic technical field of the optics. The optical system of the utility model is composed of a lens whose three optical shafts are mutually parallel; an electronic system is composed of a detector, an amplifier, a correlator, etc.; the modulated light produced by the light source can be focalized on the color code by the optical system; the light reflected by the color code can be focalized on the detector by the optical system; after the optical and electric conversion and the amplifying processing are carried out, the light can be outputted in direct current level way. The utility model can be applied to various automatic production lines with color code characteristic, such as the positioned control, the product counting operation, the width identifying operation, the speed monitoring operation, the cut-to-length, etc.
Description
The utility model relates to the optical electron technical field.
In the automated production process,, all to reduce the error that human factor produces as the automated production field of printing, the package packing machine industry maybe needs to provide actuating signal as far as possible.Thus, must coordinate automation equipment, mechanical, electrical system is accurately controlled, guarantee not produce misoperation, wherein with optoelectronic switch identification colour code, reach pinpoint purpose, be the key that realizes automated production.At present, domestic optoelectronic switch commonly used is the beam split of general employing beam splitting chip on optical system, and the loss light energy is big, has reduced system signal noise ratio; Perhaps adopt the beam splitting chip beam split, the loss light energy is big, has reduced system signal noise ratio; Perhaps adopt two lens tilt to place, optical axis intersects, and causes processing difficulties on the optics, and the assembling and setting quality is difficult to guarantee, has influenced sensitivity, and the electronic circuit in the corresponding in addition electronic system is shortcoming such as more complicated also.
The purpose of this utility model provides the reflective photoelectric switch of a kind of operating distance between 10mm-15mm---near the type reflective photoelectric switch.It utilize in the limit of visible spectrum colour code---background has the characteristic of different reflectivity to the light of a certain wavelength, from background, identify colour code.
The light modulated that the utility model is initiatively launched focuses on the colour code by optical system, and the light that is reflected by colour code focuses on the detector through optical system again, carries out opto-electronic conversion.The signal of telecommunication is amplified, is handled by electronic circuit, exports with DC level at last.Concrete structure is seen accompanying drawing.
Accompanying drawing 1: be structure chart of the present utility model.
The utility model is made up of optical system and electronic system two parts.
Optical system of the present utility model is made up of three lens, and its structure is, in lens (1) The same level line of back on be equipped with lens (2) and lens (3), and the optical axis of three lens is mutual Parallel. Wherein lens (1) consist of optical transmitting system with lens (2), lens (1) and lens (3) structure Become receiving optics.
Electronic system of the present utility model is in lens (3) back, and opto-electronic conversion detector (7) is installed, and is connected in series preamplifier (8) again, is connected in series post-amplifier (9) again, is connected to correlator (10) again; Behind lens (2), be equipped with light hurdle (5), light-emitting diode (4) is arranged thereafter, be connected in series square-wave generator (6) again, be connected to correlator (10) again.Correlator (10) is connected to the positive pole of comparator (12); the negative pole of comparator (12) connects sensitivity regulator potentiometer (11); comparator (12) is connected in series the bright switch (13) that moves, secretly moves; be connected to the NPN current/voltage output type power amplifier (14) that has short-circuit protection again, or on the PNP current/voltage output type power amplifier (15).NPN current/voltage output power amplifier (14) contains the protector of output Q and V+ (external power supply ＂+＂ end) short circuit, and PNP current/voltage output type power amplifier (15) contains the protector of exporting out Q and V-short circuit.
During the utility model work, the optical system that light modulated scioptics (1), (2), (3) that gone out by light emitted are formed focuses on the colour code, the light that is reflected by colour code focuses on the opto-electronic conversion detector (7) through optical system again, the series connection negative feedback preamplifier (8) that the signal of telecommunication that electricity conversion detector (7) provides is formed through the field-effect transistor of low noise, high input impedance carries out preposition amplification, heel one-level amplifier (9).The square wave of the signal frequency of amplifier (9) output and square-wave generator (6) output is added on the correlator (10) with frequently.Correlator is a kind of measured signal and reference signal (being square-wave generator (6) output signal) cross-correlation function arithmetic unit finished, and promptly coming out with the input of frequency homophase with reference signal in the measured signal, suppresses asynchronous noise signal.The correlator look draws together multiplier and integrator, direct current amplifier two parts are formed.The height of the direct current signal Vi of correlator (10) output is proportional to background and colour code reflectivity difference.This direct current signal Vi is input to the ＂+＂ input of comparator (12), ＂-＂ input termination one threshold level, and threshold level Vo is produced by sensitivity regulator potentiometer (11), and for reliability, Vo modulates V
1/2On, the output of comparator (12) is exactly switching value, when Vi＜Vo comparator (12) is output as logic ＂ 0 ＂, when Vi＞Vo is output as logic ＂ 1 ＂.The bright V that moves, secretly moves switch (13) of control is delivered in the output of comparator (12)
BInput, another input V
ABe the external lead wire L/D end of optoelectronic switch, work as V
AWhen unsettled, be bright moving; Work as V
ADuring the external V-of line (circumscripted power line ＂-＂ end), be dark moving.The output of switch (13) is received on the NPN current and power supply output type power amplifier (14) or PNP current and power supply output type power amplifier (15) that has short-circuit protection, is held with DC level output services voltage by Q.
The utility model has following characteristics:
1. the structure of optical emitting, receiving system is different from other optoelectronic switch, and its optical system components quantity is few, the optical efficiency height, and emission system does not have veiling glare to receiving system and disturbs.
2. the correlator in the electronic circuit has adopted the switching regulator multiplying unit, and it is different from the analog multiplier that adopts in the existing optoelectronic switch, thereby circuit is simple, debugging easily, and the linearity is good, and dynamic range is big.
3. the utility model signal to noise ratio height, working stability is not subjected to ambient light interference, can detect colour code from the minimum background of ＂ reflection differences ＂.
4. response speed is fast, is applicable to the colour code pattern of high-speed motion.
5. volume is little, compact conformation, and Installation and Debugging are convenient, have higher performance.
In a word, the utility model can be applicable to all and has the control of colour code features location, product counting, and width identification, speed monitoring, cut-to-lengths etc. are widely used a kind of devices on the multiple automatic production line.
Description of drawings:
1,2,3---lens, 4---light-emitting diode, 5---light hurdle, 6---square-wave generator 7---opto-electronic conversion detector, 8---preamplifier, 9---post-amplifier, 10---correlator, 11---the sensitivity regulator potentiometer, 12---comparator, 13---bright moving, moving switch secretly, 14---NPN current/voltage output type power amplifier, 15---PNP current/voltage output type power amplifier.
Claims (3)
- One kind by lens, Guang Lan, detector etc. form near the type reflective photoelectric switch, it is characterized in that, on the same horizontal line of lens (1) back, be equipped with lens (2) and lens (3), behind lens (3), be equipped with opto-electronic conversion detector (7), and connect, and be connected to correlator (10) with preamplifier (8) and post-amplifier (9); Behind lens (2), be equipped with light hurdle (5), light-emitting diode (4) is arranged thereafter, be connected in series square-wave generator (6) again, be connected to correlator (10); Correlator (10) is connected to the positive pole of comparator (12), and the negative pole of comparator (12) connects sensitivity regulator potentiometer (11); Bright moving, the moving switch (13) secretly of comparator (12) serial connection is connected in series to current/voltage output type power amplifier (14) again.
- 2. switch as claimed in claim 1 is characterized in that, described output power amplifier is NPN, PNP output type.
- 3. switch as claimed in claim 1 is characterized in that, the optical axis of lens (1), (2), (3) is parallel to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95240855 CN2253545Y (en) | 1995-11-10 | 1995-11-10 | Approach-type reflective photoelectric switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95240855 CN2253545Y (en) | 1995-11-10 | 1995-11-10 | Approach-type reflective photoelectric switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2253545Y true CN2253545Y (en) | 1997-04-30 |
Family
ID=33882359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95240855 Expired - Fee Related CN2253545Y (en) | 1995-11-10 | 1995-11-10 | Approach-type reflective photoelectric switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2253545Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106443818A (en) * | 2016-10-08 | 2017-02-22 | 广州杰赛科技股份有限公司 | Photoelectric switch array device and equipment, and detection method |
| CN108418567A (en) * | 2018-02-27 | 2018-08-17 | 中国科学院合肥物质科学研究院 | One kind can reset integrating low-pass wave circuit |
-
1995
- 1995-11-10 CN CN 95240855 patent/CN2253545Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106443818A (en) * | 2016-10-08 | 2017-02-22 | 广州杰赛科技股份有限公司 | Photoelectric switch array device and equipment, and detection method |
| CN106443818B (en) * | 2016-10-08 | 2019-04-30 | 广州杰赛科技股份有限公司 | A kind of optoelectronic switch array apparatus, equipment and detection method |
| CN108418567A (en) * | 2018-02-27 | 2018-08-17 | 中国科学院合肥物质科学研究院 | One kind can reset integrating low-pass wave circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |