CN108303700A - It can be used for the extra small light spot laser sensor of super-small of small items detection - Google Patents
It can be used for the extra small light spot laser sensor of super-small of small items detection Download PDFInfo
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- CN108303700A CN108303700A CN201810011246.7A CN201810011246A CN108303700A CN 108303700 A CN108303700 A CN 108303700A CN 201810011246 A CN201810011246 A CN 201810011246A CN 108303700 A CN108303700 A CN 108303700A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/04—Processes or apparatus for excitation, e.g. pumping, e.g. by electron beams
- H01S5/042—Electrical excitation ; Circuits therefor
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Abstract
The present invention relates to a kind of extra small light spot laser sensors of super-small can be used for small items detection, including semiconductor laser generator, high-precision lenses optical system, the laser sensor further include linear COMS position sensors module and signal processing system；The signal processing system include filtering and amplifying circuit module, ultra high speed A/D conversion circuit module, high speed FIFO circuit module, DSP control circuit modules, compare and screening circuit module, pixel count processing circuit module, signal designation output circuit module.The present invention is designed by using foregoing circuit, laser sensor can be made to achieve the effect that super-small, extra small hot spot and superhigh precision, laser spot diameter is only 0.5mm, the requirement of installation space can be met, particularly with the requirement of high-accuracy intelligent equipment, the stitch of the small items such as chip to diameter less than 1mm, the reliable and stable detection of the similar articles such as hairline can be realized again.
Description
Technical field：
The invention belongs to sensor technical field more particularly to industrial automation industry non-contact detection laser sensings
Device refers in particular to a kind of extra small light spot laser sensor of super-small can be used for small items detection.
Background technology：
Background 1：Existing photoelectric sensor, proximity sensor equidimension is all bigger than normal, is not suitable for requiring delicate structure, installation
The precision intelligence automated machine of limited space.Present field of industrial production, automated production equipment requirement is intelligentized simultaneously,
Structure design itself is also more accurate, more small and exquisite, it requires sensor while realizing reliable and stable detection, size itself is got over
It is small better, big installation space is not occupied, this requires sensor size itself is small as possible.
Background 2：Present field of industrial production, detected object materials are different, such as metal material and nonmetallic materials,
Different materials surface treatment is different, many materials done require after surface treatment cannot machinery touch, otherwise can damage
Or damage material, therefore requirement cannot be in direct contact with material and be detected, and not influenced stable detection by material.
Background 3：Existing photoelectric sensor, the sensors hot spot such as ultrasonic wave, sound wave is all bigger than normal, is not suitable for detection such as chip
The detection of the tiny workpiece such as stitch.Present field of industrial production, many parts designs are very small and exquisite.Such as semicon industry chip
Stitch etc., these detected objects are due to being small items (diameter<1mm), if also to its stable detection.
Above-mentioned 3 backgrounds are superimposed, this is inherently difficult to the contradiction all handled well, and existing sensor is difficult full
Sufficient above-mentioned requirements.
Invention content：
The purpose of the present invention is to be to overcome the above-mentioned shortcoming of the prior art, provides and can be used for small items detection
The extra small light spot laser sensor of super-small.
The technical solution adopted by the present invention is：A kind of extra small light spot laser biography of the super-small can be used for small items detection
Sensor, including semiconductor laser generator, high-precision lenses optical system, wherein：The laser sensor further includes linear COMS
Position sensor module and signal processing system；The signal processing system includes filtering and amplifying circuit module, high-speed AD turn
Change circuit module, high speed FIFO circuit module, DSP control circuit modules, compare and screening circuit module, pixel count processing electricity
Road module, signal designation output circuit module；
Wherein, linear COMS position sensors module and filtering and amplifying circuit module and compared with and screening circuit module connect
It connects, filtering and amplifying circuit module is sequentially connected ultra high speed A/D conversion circuit module, high speed FIFO circuit module, DSP control circuit moulds
Block, compares and screening circuit module counts processing circuit with high speed FIFO circuit module, DSP control circuit modules and pixel respectively
Module connects, and pixel counts processing circuit module and is connected with each other with DSP control circuit modules and signal designation output circuit module；
Linear COMS position sensor modules are also associated with CPLD scan drive circuit modules, CPLD scan drive circuit moulds
Block also counts processing circuit module with AD conversion circuit module and pixel respectively and connect；
Semiconductor laser generator includes laser diode, laser diode drive, laser current adjustment module, laser
Frequency adjustment module and intelligent laser control module；Intelligent laser control module is connect with DSP control circuit modules；In high precision
Lens optical system is connect with linear COMS position sensors module.
The semiconductor laser generator by first comparator, laser diode D1, D2, D3, D4, resistance R2, R3, R4,
Adjustable resistance R5, capacitance C4 compositions, wherein resistance R2 connects with laser diode D1, D2, resistance R3 and laser diode D3,
D4 connects, and resistance R4 connects with adjustable resistance R5, in parallel after three groups of series connection, and latter public terminating resistor R1 in parallel is followed by power supply,
Another common end is connect with DSP control circuit modules；The positive input pin connection resistance R3 and laser diode of first comparator
Between D3, negative input pin connects the adjustable side of adjustable resistance R5, and the power input of first comparator is connect with resistance R1；First
The output end of comparator is connect with DSP control circuit modules；The common end of one end connection resistance R2, R3, R4 of capacitance C4, it is another
End connection DSP control circuit modules；
The DSP control circuit modules are by the second comparator, resistance R6, R7, R8, diode D5, light emitting diode D6, three
Pole pipe Q1, signal relay KS compositions, wherein the positive input pin of the second comparator is connect with capacitance C4, the second comparator
Negative input pin and the output end of first comparator connect；Resistance R6, R7 and light emitting diode D6 series connection, diode D5 and signal
It is connect with the emitter of triode Q1 after relay KS parallel connections；Common end and the electricity of resistance R6, diode D5, signal relay KS
Hinder the common end connection of R2, R3, R4；The collector of triode Q1 connect with light emitting diode D6 and with laser diode D2, D4
Common end connection；The output end of second comparator is connect with the common end of resistance R6, R7, and the base stage of triode Q1 is by electricity
It is also connect with the common end of resistance R6, R7 after resistance R8；
The comparison and screening circuit module are by third comparator, capacitance C2, C3, resistance R9, R10 and light emitting diode
D7 is formed；Wherein, the positive input pin of third comparator is connect by resistance R11 with power supply, and the negative input of third comparator connects
Foot is grounded after capacitance C2, and the ground connection pin of third comparator is grounded after capacitance C3；Resistance R10, R9, light emitting diode
D7 connects, and the outer end of resistance R10 connects power supply, the cathode ground connection of light emitting diode D7；The output end and resistance of third comparator
The common end of R9, R10 connect and count processing circuit module with pixel and connect；
The pixel counts processing circuit module and signal designation output circuit module by the first operational amplifier, capacitance
C1, resistance R12, R13, light emitting diode D8, diode D9 and triode Q2 are collectively constituted；Wherein, first operational amplifier
Positive input pin is connect with capacitance C1 and the capacitance C1 other ends are grounded, while the positive input pin of the first operational amplifier also passes through
One resistance R14 in DSP control circuit modules resistance R6, diode D5, signal relay KS common end connect；First fortune
The negative input pin for calculating amplifier is connect with the output end of third comparator；The output end and resistance R12 of first operational amplifier,
R13, the cathode of diode D9, triode Q2 emitter connect jointly；The collector of the anode and triode Q2 of diode D9
Connect simultaneously connection signal output end；The base stage of triode Q2 is connect with the first operational amplifier；Light emitting diode D8 anode with
Resistance R12 series connection, the cathode ground connection of light emitting diode D8；
The filtering and amplifying circuit module is by second operational amplifier, resistance R23, R24, R25, R26, R27, R28 and electricity
Hold C6 compositions, wherein the positive input pin of second operational amplifier is connected by concatenated resistance R24, R23 and power supply；Resistance
R26, R27, R28, capacitance C6 one end connect jointly, the other end of resistance R26 and the negative input pin of second operational amplifier
Connection, another termination power of resistance R27, the other end ground connection of resistance R28, the other end and the semiconductor laser of capacitance C6 occur
Resistance R4 connections in device；One end of resistance R25 and the negative input pin of second operational amplifier connect, the other end and the second fortune
Calculate the output end connection of amplifier；The output end of second operational amplifier is also electric with ultra high speed A/D conversion circuit module, high speed FIFO
Road module connection；
The ultra high speed A/D conversion circuit module and high speed FIFO circuit module by third operational amplifier, adjustable resistance R21,
Resistance R22, R29, capacitance C7 and triode Q3 connect composition jointly, wherein the positive input pin string of third operational amplifier
Connect with the output end of second operational amplifier after connection resistance R29, the positive input pin of third operational amplifier also with capacitance C7
Connection, capacitance C7 other ends ground connection；The adjustable side of the negative input pin connection adjustable resistance R21 of third operational amplifier, it is adjustable
The another both ends of resistance R21 connect power supply and ground connection respectively；The collector of triode Q3 is connect with the output end of third operational amplifier,
The base stage of triode Q3 is connect with after resistance R22 series connection with third operational amplifier；The emitter of triode Q3 and resistance R6, two
The common end connection of pole pipe D5, signal relay KS.
A diameter of 3mm of laser head and threaded in the semiconductor laser generator, laser head length are 16mm, laser
Spot diameter is 0.5mm.
The present invention is designed by using foregoing circuit, and laser sensor can be made to reach super-small, extra small hot spot and superelevation
The effect of precision, laser spot diameter are only 0.5mm, can meet the requirement of installation space, particularly with high-accuracy intelligence
The requirement of equipment, and can realize the stitch of the small items such as chip to diameter less than 1mm, the stabilization of the similar articles such as hairline
Reliable detection；Moreover, the circuit module of laser sensor of the present invention simplifies, cost is lower, can reduce user's purchase cost.
Description of the drawings：
Fig. 1 is the circuit structure block diagram of laser sensor of the present invention；
Fig. 2 is the circuit diagram of laser sensor of the present invention；
Fig. 3 is the range measurement principle figure of laser sensor of the present invention；
Fig. 4 is the schematic diagram in kind of laser sensor of the present invention.
Specific implementation mode：
With reference to specific embodiments and the drawings, the present invention is further described.
As shown in FIG. 1 to 3, a kind of extra small hot spot of super-small can be used for small items detection of the present invention swashs
Optical sensor, including semiconductor laser generator 1, high-precision lenses optical system 11, wherein：The laser sensor further includes line
Property COMS position sensors module 12 and signal processing system；The signal processing system include filtering and amplifying circuit module 2,
Ultra high speed A/D conversion circuit module 3, high speed FIFO circuit module 4, DSP control circuit modules 5, compare and screening circuit module 6, as
Member counts processing circuit module 7, signal designation output circuit module 8；
Wherein, linear COMS position sensors module 12 and filtering and amplifying circuit module 2 and compared with and screening circuit module 6
Connection, filtering and amplifying circuit module 2 are sequentially connected ultra high speed A/D conversion circuit module 3, high speed FIFO circuit module 4, DSP control electricity
Road module 5, compares and screening circuit module 6 is counted with high speed FIFO circuit module 4, DSP control circuit modules 5 and pixel respectively
Processing circuit module 7 connects, and compares and screening circuit module 6 is written and read control to high speed FIFO circuit module 4, compare and sieve
It selects circuit module 6 to count processing circuit module 7 to pixel and carries out tally control；Pixel counts processing circuit module 7 and DSP and controls
Circuit module 5 and signal designation output circuit module 8 are connected with each other；
Linear COMS position sensors module 12 is also associated with CPLD scan drive circuits module 13, CPLD turntable driving electricity
Road module 13 also counts processing circuit module 7 with ultra high speed A/D conversion circuit module 3 and pixel respectively and connect；
Semiconductor laser generator 1 includes laser diode 101, laser diode drive 102, laser current adjusting mould
Block 103, laser frequency adjustment module 104 and intelligent laser control module 105；Intelligent laser control module 105 and DSP is controlled
Circuit module 5 connects；High-precision lenses optical system 11 is connect with linear COMS position sensors module 12；
The laser diode of semiconductor laser generator 1 emits laser under the work of its driver, thoroughly by high-precision
Mirror optical system 11 emits towards testee, is connect by high-precision lenses optical system 11 by the reflected light of object
Receive, by linear COMS position sensors module 12 be converted into electric signal analyzed by signal processing system, handle after export
Testing result；By intelligent laser control module 105, laser current adjustment module 103, laser frequency adjustment module 104 come root
According to adjusting laser physical property is needed, to adapt to different detection needs.
The semiconductor laser generator 1 by first comparator 14, laser diode D1, D2, D3, D4, resistance R2, R3,
R4, adjustable resistance R5, capacitance C4 compositions, wherein resistance R2 connects with laser diode D1, D2, resistance R3 and laser diode
D3, D4 connect, and resistance R4 connects with adjustable resistance R5, in parallel after three groups of series connection, and latter public terminating resistor R1 in parallel is followed by electricity
Source, another common end are connect with DSP control circuit modules；Positive input pin connection resistance R3 and the laser two of first comparator 14
Between pole pipe D3, negative input pin connects the adjustable side of adjustable resistance R5, and power input and the resistance R1 of first comparator 14 connect
It connects；The output end of first comparator 14 is connect with DSP control circuit modules；The public affairs of one end connection resistance R2, R3, R4 of capacitance C4
End altogether, the other end connect DSP control circuit modules 5；
The DSP control circuit modules 5 are by the second comparator 51, resistance R6, R7, R8, diode D5, light emitting diode
D6, triode Q1, signal relay KS compositions, wherein the positive input pin of the second comparator 51 is connect with capacitance C4, the second ratio
Negative input pin compared with device 51 is connect with the output end of first comparator 14；Resistance R6, R7 and light emitting diode D6 series connection, two poles
Pipe D5 is connect with after signal relay KS parallel connections with the emitter of triode Q1；Resistance R6, diode D5, signal relay KS
Common end is connect with the common end of resistance R2, R3, R4；The collector of triode Q1 connect with light emitting diode D6 and with laser two
The common end of pole pipe D2, D4 connects；The output end of second comparator 51 is connect with the common end of resistance R6, R7, and triode Q1
Base stage also connect with the common end of resistance R6, R7 after resistance R8；
The comparison and screening circuit module 6 are by third comparator 61, capacitance C2, C3, resistance R9, R10 and luminous two
Pole pipe D7 compositions；Wherein, the positive input pin of third comparator 61 is connect by resistance R11 with power supply, third comparator 61
Negative input pin is grounded after capacitance C2, and the ground connection pin of third comparator 61 is grounded after capacitance C3；Resistance R10, R9,
The outer end of light emitting diode D7 series connection, resistance R10 connects power supply, the cathode ground connection of light emitting diode D7；Third comparator 61
Output end connect with the common end of resistance R9, R10 and counts processing circuit module 7 with pixel and connect；
The pixel counts processing circuit module 7 and signal designation output circuit module 8 by the first operational amplifier 71, electricity
Hold C1, resistance R12, R13, light emitting diode D8, diode D9 and triode Q2 to collectively constitute；Wherein, the first operational amplifier
71 positive input pin is connect with capacitance C1 and the capacitance C1 other ends are grounded, while the positive input pin of the first operational amplifier 71
Also pass through the common end company of a resistance R14 and resistance R6, diode D5, signal relay KS in DSP control circuit modules 5
It connects；The negative input pin of first operational amplifier 71 is connect with the output end of third comparator 61；First operational amplifier 71
Output end is connect jointly with the emitter of resistance R12, R13, the cathode of diode D9, triode Q2；Diode D9 anode with
The collector of triode Q2 connects and connection signal output end；The base stage of triode Q2 is connect with the first operational amplifier 71；Hair
The anode of optical diode D8 is connected with resistance R12, the cathode ground connection of light emitting diode D8；
The filtering and amplifying circuit module 2 by second operational amplifier 21, resistance R23, R24, R25, R26, R27, R28 and
Capacitance C6 compositions, wherein the positive input pin of second operational amplifier 21 is connected by concatenated resistance R24, R23 and power supply；
Resistance R26, R27, R28, capacitance C6 one end connect jointly, the other end of resistance R26 and second operational amplifier 21 it is negative defeated
Enter pin connection, another termination power of resistance R27, the other end ground connection of resistance R28, the other end and the semiconductor of capacitance C6 swash
Resistance R4 connections in optical generator；One end of resistance R25 is connect with the negative input pin of second operational amplifier 21, the other end
It is connect with the output end of second operational amplifier；The output end of second operational amplifier 21 also with ultra high speed A/D conversion circuit module 3,
High speed FIFO circuit module 4 connects；
The ultra high speed A/D conversion circuit module 3 and high speed FIFO circuit module 4 are by third operational amplifier 31, adjustable resistance
R21, resistance R22, R29, capacitance C7 and triode Q3 connect composition jointly, wherein the positive input of third operational amplifier 31
It is connect with the output end of second operational amplifier 21 after pin series resistance R29, the positive input pin of third operational amplifier 31
It is also connect with capacitance C7, capacitance C7 other ends ground connection；The negative input pin connection adjustable resistance R21's of third operational amplifier 31
The another both ends of adjustable side, adjustable resistance R21 connect power supply and ground connection respectively；The collector of triode Q3 and third operational amplifier 31
Output end connection, the base stage of triode Q3 connect after connecting with resistance R22 with third operational amplifier 31；The hair of triode Q3
Emitter-base bandgap grading is connect with the common end of resistance R6, diode D5, signal relay KS.
Again as shown in figure 4, a diameter of 3mm of laser head A and threaded being connected and fixed in the semiconductor laser generator
Nut a, laser head A length are 16mm, laser spot diameter 0.5mm, reach super-small, extra small hot spot.
The present invention is designed by using foregoing circuit, and laser sensor can be made to reach super-small, extra small hot spot and superelevation
The effect of precision, laser spot diameter are only 0.5mm, can meet the requirement of installation space, particularly with high-accuracy intelligence
The requirement of equipment, and can realize the stitch of the small items such as chip to diameter less than 1mm, the stabilization of the similar articles such as hairline
Reliable detection；Moreover, the circuit module of laser sensor of the present invention simplifies, cost is lower, can reduce user's purchase cost.
The beneficial effects are mainly as follows：
1：The design of super-small M3 meets the requirement of installation space, the requirement of especially high-accuracy intelligent equipment.
2：The design of extra small laser facula is realized to small items (diameter<1mm) reliable and stable detection.
3：The design of extra small laser facula, can be to the object (diameter of diameter very little<1mm) (stitch of such as chip, hair
Silk) it can realize reliable and stable detection.
4：The design of extra small laser facula can realize high-precision positioning, limit etc. to object to be detected.
5：The design of extra small laser facula, can be to object to be detected reality in factory on a large scale large batch of production process
Existing high-precision repeatable accuracy, to ensure that product quality, the coherence request of performance.
6：The light source of selection be laser light source, almost thus object to be detected (metal, nonmetallic) can realize surely
Fixed reliable non-contact detecting, there is no the surfaces for damaging or damaging detection object.
7：By ingehious design, realize super-small, while extra small hot spot, cost be imported product three/
One.To reduce the purchase cost of client.
Claims (3)
1. a kind of extra small light spot laser sensor of super-small can be used for small items detection, including semiconductor laser occur
Device, high-precision lenses optical system, it is characterised in that：The laser sensor further include linear COMS position sensors module and
Signal processing system；The signal processing system includes filtering and amplifying circuit module, ultra high speed A/D conversion circuit module, high speed FIFO
Circuit module, DSP control circuit modules, compare and screening circuit module, pixel count processing circuit module, signal designation output
Circuit module；
Wherein, linear COMS position sensors module and filtering and amplifying circuit module and compared with and screening circuit module connect, put
Big filter circuit module is sequentially connected ultra high speed A/D conversion circuit module, high speed FIFO circuit module, DSP control circuit modules, than
Compared with and screening circuit module respectively with high speed FIFO circuit module, DSP control circuit modules and pixel count processing circuit module
Connection, pixel count processing circuit module and are connected with each other with DSP control circuit modules and signal designation output circuit module；
Linear COMS position sensor modules are also associated with CPLD scan drive circuit modules, and CPLD scan drive circuits module is also
Processing circuit module is counted with AD conversion circuit module and pixel respectively to connect；
Semiconductor laser generator includes laser diode, laser diode drive, laser current adjustment module, laser frequency
Adjustment module and intelligent laser control module；Intelligent laser control module is connect with DSP control circuit modules；High-precision lenses
Optical system is connect with linear COMS position sensors module.
2. the super-small extra small light spot laser sensor according to claim 1 that can be used for small items detection, special
Sign is：The semiconductor laser generator by first comparator, laser diode D1, D2, D3, D4, resistance R2, R3, R4, can
Adjust resistance R5, capacitance C4 compositions, wherein resistance R2 connects with laser diode D1, D2, resistance R3 and laser diode D3, D4
Series connection, resistance R4 connect with adjustable resistance R5, in parallel after three groups of series connection, and latter public terminating resistor R1 in parallel is followed by power supply, separately
One common end is connect with DSP control circuit modules；The positive input pin connection resistance R3 and laser diode D3 of first comparator
Between, negative input pin connects the adjustable side of adjustable resistance R5, and the power input of first comparator is connect with resistance R1；First ratio
Output end compared with device is connect with DSP control circuit modules；The common end of one end connection resistance R2, R3, R4 of capacitance C4, the other end
Connect DSP control circuit modules；
The DSP control circuit modules are by the second comparator, resistance R6, R7, R8, diode D5, light emitting diode D6, triode
Q1, signal relay KS compositions, wherein the positive input pin of the second comparator is connect with capacitance C4, and bearing for the second comparator is defeated
The output end for entering pin and first comparator connects；Resistance R6, R7 and light emitting diode D6 series connection, diode D5 and signal relay
It is connect with the emitter of triode Q1 after device KS parallel connections；Resistance R6, diode D5, the common end of signal relay KS and resistance
The common end of R2, R3, R4 connect；The collector of triode Q1 connect with light emitting diode D6 and with laser diode D2, D4
Common end connects；The output end of second comparator is connect with the common end of resistance R6, R7, and the base stage of triode Q1 passes through resistance
It is also connect with the common end of resistance R6, R7 after R8；
The comparison and screening circuit module are by third comparator, capacitance C2, C3, resistance R9, R10 and light emitting diode D7 groups
At；Wherein, the positive input pin of third comparator is connect by resistance R11 with power supply, the negative input pin warp of third comparator
It is grounded after crossing capacitance C2, the ground connection pin of third comparator is grounded after capacitance C3；Resistance R10, R9, light emitting diode D7 strings
The outer end of connection, resistance R10 connects power supply, the cathode ground connection of light emitting diode D7；The output end and resistance R9 of third comparator,
The common end of R10 connects and counts processing circuit module with pixel and connect；
The pixel counts processing circuit module and signal designation output circuit module by the first operational amplifier, capacitance C1, electricity
Resistance R12, R13, light emitting diode D8, diode D9 and triode Q2 are collectively constituted；Wherein, the positive input of the first operational amplifier
Pin is connect with capacitance C1 and the capacitance C1 other ends are grounded, while the positive input pin of the first operational amplifier also passes through a resistance
R14 in DSP control circuit modules resistance R6, diode D5, signal relay KS common end connect；First operation amplifier
The negative input pin of device is connect with the output end of third comparator；The output end of first operational amplifier and resistance R12, R13, two
The cathode of pole pipe D9, the emitter of triode Q2 connect jointly；The anode of diode D9 is connect simultaneously with the collector of triode Q2
Connection signal output end；The base stage of triode Q2 is connect with the first operational amplifier；Anode and the resistance R12 of light emitting diode D8
Series connection, the cathode ground connection of light emitting diode D8；
The filtering and amplifying circuit module is by second operational amplifier, resistance R23, R24, R25, R26, R27, R28 and capacitance C6
Composition, wherein the positive input pin of second operational amplifier is connected by concatenated resistance R24, R23 and power supply；Resistance R26,
R27, R28, capacitance C6 one end connect jointly, the negative input pin of the other end of resistance R26 and second operational amplifier connects,
The other end of another termination power of resistance R27, resistance R28 is grounded, in the other end and semiconductor laser generator of capacitance C6
Resistance R4 connections；One end of resistance R25 and the negative input pin of second operational amplifier connect, and the other end is put with the second operation
The output end connection of big device；The output end of second operational amplifier also with ultra high speed A/D conversion circuit module, high speed FIFO circuit mould
Block connects；
The ultra high speed A/D conversion circuit module and high speed FIFO circuit module are by third operational amplifier, adjustable resistance R21, resistance
R22, R29, capacitance C7 and triode Q3 connect composition jointly, wherein the positive input pin series electrical of third operational amplifier
It being connect with the output end of second operational amplifier after resistance R29, the positive input pin of third operational amplifier is also connect with capacitance C7,
The capacitance C7 other ends are grounded；The adjustable side of the negative input pin connection adjustable resistance R21 of third operational amplifier, adjustable resistance
The another both ends of R21 connect power supply and ground connection respectively；The collector of triode Q3 is connect with the output end of third operational amplifier, three poles
The base stage of pipe Q3 is connect with after resistance R22 series connection with third operational amplifier；
The emitter of triode Q3 is connect with the common end of resistance R6, diode D5, signal relay KS.
3. the super-small extra small light spot laser sensor according to claim 1 that can be used for small items detection, special
Sign is：A diameter of 3mm of laser head and threaded in the semiconductor laser generator, laser head length are 16mm, laser
Spot diameter is 0.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810011246.7A CN108303700A (en) | 2018-01-05 | 2018-01-05 | It can be used for the extra small light spot laser sensor of super-small of small items detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810011246.7A CN108303700A (en) | 2018-01-05 | 2018-01-05 | It can be used for the extra small light spot laser sensor of super-small of small items detection |
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| Publication Number | Publication Date |
|---|---|
| CN108303700A true CN108303700A (en) | 2018-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810011246.7A Pending CN108303700A (en) | 2018-01-05 | 2018-01-05 | It can be used for the extra small light spot laser sensor of super-small of small items detection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116632130A (en) * | 2023-04-18 | 2023-08-22 | 深圳市志奋领科技有限公司 | Photoelectric sensor with adjustable light spot size and method |
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