CN105897237A - Regression reflection photoelectric switch - Google Patents
Regression reflection photoelectric switch Download PDFInfo
- Publication number
- CN105897237A CN105897237A CN201610368739.7A CN201610368739A CN105897237A CN 105897237 A CN105897237 A CN 105897237A CN 201610368739 A CN201610368739 A CN 201610368739A CN 105897237 A CN105897237 A CN 105897237A
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- Prior art keywords
- light
- interface
- receiving device
- hole
- photoswitch
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/941—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated using an optical detector
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
- H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
- H03K2217/941—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated using an optical detector
- H03K2217/94102—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated using an optical detector characterised by the type of activation
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- Switches Operated By Changes In Physical Conditions (AREA)
Abstract
The invention discloses a regression reflection photoelectric switch which comprises a switch shell. A PCB (Printed Circuit Board) assembly, a light emitter for emitting detection light and a light receiver for receiving light reflected by a reflection board are fixed in the switch shell. The PCB assembly is provided with a light emitting circuit connected with the light emitter and a signal output circuit connected with the light receiver. The detection light emitted by the light emitter is sensed by the light receiver after being subjected to reflection regression, and by the signal output circuit, an electric signal is output. The regression reflection photoelectric switch integrates the light emitter with the light receiver into one whole body, so that a detection distance can be effectively prolonged, detection accuracy can be effectively improved and the anti-interference capability is improved; and the regression reflection photoelectric switch has the advantages of long detection distance, high anti-interference capability, high response speed and the like.
Description
Technical field
The present invention relates to a kind of photoelectric sensor, specifically a kind of retroreflecting photoswitch.
Background technology
Photoelectric sensor belongs to non-contact type detection sensor, and its detecting distance is relatively wide, and for detecting the presence or absence of object, distance and character etc., therefore it is widely used in industrial automation arrangement field.
Photoelectric sensor is to utilize detected material block light beam or reflect, and by synchronization loop gating circuit, thus detects with presence or absence of object.Object is not limited to metal, and all objects that can reflect light all can be detected.Input current is converted to optical signal injection on emitter by photoelectric sensor, and receptor further according to the power of the light received or detects with or without to target object.
Existing photoelectric sensor is made up of emitter, receptor and testing circuit three part.Emitter alignment objective emission light beam, the light beam launched is typically derived from semiconductor light source, light emitting diode, laser diode and infrared-emitting diode, light beam is launched incessantly, or change pulse width, light beam radiation intensity pulsed, in the transmission through repeatedly selecting, is run the most indirectly towards target.Receptor is made up of photodiode or phototriode, light cell, and before receptor, equipped with optical element such as lens and aperture etc., face is testing circuit behind, and it can leach useful signal and apply this signal.In addition, the structural detail of photoelectric sensor also has triangle reflecting plate and optical fibers, triangle reflecting plate is well-set discharger, light beam is made to return from reflecting plate exactly, it can change the angle of departure in the scope with optical axis 0 to 25, make light beam almost launch line from one, after reflection, or return from this root reflected ray.
Presence or absence, distance and the character etc. of object can be detected by above-mentioned photoelectric sensor accurately, but structure is complex, and lacks the setting of protection circuit; reliability is the highest; service life is big compared with short and volume, occupies more space, use inconvenience when of use.
Summary of the invention
The technical problem to be solved is for above-mentioned prior art present situation, and a kind of retroreflecting photoswitch is provided, luminous organ and light-receiving device being integrated in one, luminous organ emits beam and reflexes to light-receiving device, and light-receiving device selects current signal after optical signal being detected and exports.
The present invention solves the technical scheme that above-mentioned technical problem used: a kind of retroreflecting photoswitch, including switch case, is fixed with PCB assembly, for sending the luminous organ of detection light and for receiving the light-receiving device of baffle reflection light in switch case.PCB assembly is shaped with the illuminating circuit being connected with luminous organ and the signal output apparatus being connected with light-receiving device.Luminous organ sends after detection light is reflected recurrence and is sensed by light-receiving device, and exports the signal of telecommunication by signal output apparatus.
For optimizing technique scheme, present invention additionally comprises the technical scheme of following improvement.
Above-mentioned luminous organ is light emitting diode.Illuminating circuit includes the optical modulator module that Power Entry Module, rectifying and voltage-stabilizing module are connected with luminous organ.
Above-mentioned light-receiving device is phototriode.Signal output apparatus includes signal amplification module, modulation circuit module, clocked logic module and the signal output module being connected with light-receiving device.
Above-mentioned Power Entry Module includes power input interface.Rectifying and voltage-stabilizing module includes power supply chip.Power supply chip is provided with Vout interface, Vin interface and GND interface.Vout interface with GND interface respectively two ends with the first electric capacity be connected, and GND interface is connected with earth terminal.Vin interface with GND interface respectively two ends with the second electric capacity be connected, and be parallel with the output branch road that the first resistance, the first diode and out splice going splice are constituted at the two ends of the second electric capacity.
Above-mentioned PCB assembly includes processing chip.Optical modulator module includes light modulation audion.The colelctor electrode of light modulation audion is connected with out splice going splice, and after base series luminous organ, connection processes the GP0 interface of chip.
The colelctor electrode of above-mentioned light-receiving device and base stage connect power input interface by the second resistance, and connecting at base terminal has the polar capacitor of ground connection.The emitter stage of light-receiving device processes the GP2 interface of chip by variable resistance and the 3rd electric capacity and amplifying triode connection.
Above-mentioned switch case is square plastic casing.Installation PCB assembly, luminous organ and the cavity of light-receiving device it is shaped with in the inside of switch case.It is provided with on the top of cavity and fixes the PCB fixed plate being connected with PCB assembly.Luminous organ and light-receiving device are fixed on the side of PCB assembly.The sidewall of switch case is shaped with the fenestra of transmitted light, is installed with filter lens at fenestra.
Being provided with light source fixing part in above-mentioned cavity, light source fixing part is arranged between filter lens and PCB assembly, is shaped with two energy the first through hole by light and the second through hole in the inside of light source fixing part.Luminous organ is fixed on the inner of the first through hole.Light-receiving device is fixed on the inner of the second through hole.
The outer end of above-mentioned first through hole is installed with the first collecting lens, is shaped with the first bundle unthreaded hole at the middle part of the first through hole.The outer end of the second through hole is installed with the second light transparent lens, is shaped with the second bundle unthreaded hole at the middle part of the second through hole.The both sides of light source fixing part are shaped with fixes the ladder bayonet socket being connected with switch case inwall.
The top of above-mentioned switch case is provided with light guide plate and the adjusting knob being connected with PCB assembly.Being provided with power supply indicator and working station indicator below light guide plate, power supply indicator is connected with power interface by power branch.Working station indicator is connected with the emitter stage of display lamp audion, and the base stage connection of display lamp audion processes the GP5 interface of chip, and colelctor electrode connects power supply.
Compared with prior art, the retroreflecting formula photoswitch of the present invention, luminous organ and light-receiving device are integrated in one, luminous organ sends after detection light is reflected recurrence and is sensed by light-receiving device, and export the signal of telecommunication by signal output apparatus, detecting distance and accuracy of detection can be effectively improved, improve capacity of resisting disturbance, there is the advantages such as detecting distance is remote, capacity of resisting disturbance strong, fast response time.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention.
Fig. 2 is the plan structure schematic diagram of Fig. 1.
Fig. 3 is the cross-sectional view of Fig. 1.
Fig. 4 is the cross-sectional view of another kind of embodiment.
Fig. 5 is the electrical block diagram of power pack in PCB assembly.
Fig. 6 is the electrical block diagram of PCB assembly.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are described in further detail.
Fig. 1 to Fig. 6 show the structural representation of the present invention.
Reference therein is: switch case 1, cavity 11, filter lens 12, PCB assembly 2, PCB fixed plate 21, luminous organ 3, light-receiving device 4, light source fixing part 5, first through hole 51, second through hole 52, first collecting lens 53, first bundle unthreaded hole 54, second light transparent lens 55, second bundle unthreaded hole 56, ladder bayonet socket 57, light guide plate 6, adjusting knob 7, power supply chip 81, first electric capacity 82, second electric capacity 83, first resistance 84, first diode 85, out splice going splice 86, process chip 87, light modulation audion 88, polar capacitor 89, variable resistance 91, 3rd electric capacity 92, amplifying triode 93, power supply indicator 94, working station indicator 95, display lamp audion 96.
As shown in Figures 1 to 3, a kind of retroreflecting photoswitch of the present invention, including switch case 1, in switch case 1, it is fixed with PCB assembly 2, for sending the luminous organ 3 of detection light and returning the light-receiving device 4 of light for receiving reflection.
PCB assembly 2 is shaped with the illuminating circuit being connected with luminous organ 3 and the signal output apparatus being connected with light-receiving device 4.Luminous organ 3 sends after detection light is reflected recurrence and is sensed by light-receiving device 4, and exports the signal of telecommunication by signal output apparatus.
In the present invention, luminous organ 3 is to be connected with optical modulator module to be connected to light emitting diode, it is preferred to use wavelength is the infrarede emitting diode of 600nm to 900nm.Using light source wave band in the present embodiment is the infrarede emitting diode of 880nm.The light that luminous organ 3 sends is returned through outside baffle reflection, then is detected by light-receiving device 4 sensing.
Light-receiving device 4 is the phototriode being connected with signal amplification module.If there being barrier to stop light between retroreflecting formula photoswitch and reflecting plate, light-receiving device 4 just can detect barrier.
Illuminating circuit includes the optical modulator module that Power Entry Module, rectifying and voltage-stabilizing module are connected with luminous organ 3, power supply can be carried out rectifying and voltage-stabilizing, it is achieved the luminescence of luminous organ 3 and modulation light.
Signal output apparatus includes signal amplification module, modulation circuit module, clocked logic module and the signal output module being connected with light-receiving device 4.Light-receiving device 4 receives light, and converts optical signals into the signal of telecommunication by signal output apparatus and export.
Power Entry Module includes power input interface.Rectifying and voltage-stabilizing module includes power supply chip 81.Power supply chip 81 is provided with Vout interface, Vin interface and GND interface.Vout interface with GND interface respectively two ends with the first electric capacity 82 be connected, and GND interface is connected with earth terminal.Vin interface with GND interface respectively two ends with the second electric capacity 83 be connected, and be parallel with first resistance the 84, first diode 85 at the two ends of the second electric capacity 83 and output branch road that out splice going splice 86 is constituted.
PCB assembly 2 includes processing chip 87.Optical modulator module includes light modulation audion 88.The colelctor electrode of light modulation audion 88 is connected with out splice going splice 86, and after base series luminous organ 3, connection processes the GP0 interface of chip 87.
The colelctor electrode of light-receiving device 4 and base stage connect power input interface by the second resistance, and connecting at base terminal has the polar capacitor 89 of ground connection.The emitter stage of light-receiving device 4 processes the GP2 interface of chip 87 by variable resistance 91 and the 3rd electric capacity 92 and amplifying triode 93 connection.
Switch case 1 is square plastic casing, is preferably dimensioned to be 20mm*30mm.Installation PCB assembly 2, luminous organ 3 and the cavity 11 of light-receiving device 4 it is shaped with in the inside of switch case 1.
The PCB fixed plate 21 that be connected fixing with PCB assembly 2 it is provided with on the top of cavity 11.PCB fixed plate 21 is connected with the inwall of switch case 1, and the PCB assembly 2 that is fixed.
It is shaped with aperture, power line and data wire in switch case 1 to be connected with PCB assembly 2 by this aperture.
Luminous organ 3 and light-receiving device 4 are fixed on the side of PCB assembly 2.The sidewall of switch case 1 is shaped with the fenestra of transmitted light, is installed with filter lens 12 at fenestra.The light that luminous organ 3 sends penetrates through fenestra and filter lens 12, then after outside baffle reflection, injects light-receiving device 4 through fenestra and filter lens 12.Filter lens 12 is used for filtering the interference to light-receiving device 4 of the visible ray light with other wavelength, it is preferred to use infrared penetrate PC plastics.
Being provided with light source fixing part 5 in cavity 11, light source fixing part 5 is arranged between filter lens 12 and PCB assembly 2, is shaped with two energy the first through hole 51 and the second through hole 52 by light in the inside of light source fixing part 5.Luminous organ 3 is fixed on the inner of the first through hole 51.Light-receiving device 4 is fixed on the inner of the second through hole 52.
The outer end of the first through hole 51 is installed with the first collecting lens 53, is shaped with the first bundle unthreaded hole 54 at the middle part of the first through hole 51.The outer end of the second through hole 52 is installed with the second light transparent lens 55, is shaped with the second bundle unthreaded hole 56 at the middle part of the second through hole 52.
First collecting lens 53 realizes the wide-angle light beam of luminous organ 3 and becomes low-angle light beam.Second light transparent lens 55 has spotlight effect to light, improves the detection sensitivity of light-receiving device 4.
Light source fixing part 5 is used for fixing luminous organ 3 and light-receiving device 4, and is limited the angle of light by the first bundle unthreaded hole 54 and the second bundle unthreaded hole 56.
The both sides of light source fixing part 5 are shaped with fixes, with switch case 1 inwall, the ladder bayonet socket 57 being connected.
The top of switch case 1 is provided with light guide plate 6 and the adjusting knob 7 being connected with PCB assembly 2, is used for regulating sensitivity and the output type of retroreflecting formula photoswitch.Being provided with power supply indicator 94 and working station indicator 95 below light guide plate 6, power supply indicator 94 is connected with power interface by power branch.Working station indicator 95 is connected with the emitter stage of display lamp audion 96, and the base stage connection of display lamp audion 96 processes the GP5 interface of chip 87, and colelctor electrode connects power supply.
Being another embodiment of the invention shown in Fig. 4, in this embodiment, luminous organ 3 is fixed on the inner of the first through hole 51, and is connected with PCB assembly 2, and the light that luminous organ 3 sends directly is penetrated by fenestra and filter lens 12.
Highly preferred embodiment of the present invention illustrates, those of ordinary skill in the art the various changes made or remodeling are all without departing from the scope of the present invention.
Claims (10)
1. a retroreflecting photoswitch, including switch case (1), it is characterized in that: be fixed with PCB assembly (2) in described switch case (1), for sending the luminous organ (3) of detection light and for receiving the light-receiving device (4) of baffle reflection light；Described PCB assembly (2) is shaped with the illuminating circuit being connected with luminous organ (3) and the signal output apparatus being connected with light-receiving device (4)；Described luminous organ (3) sends after detection light is reflected recurrence and is sensed by described light-receiving device (4), and exports the signal of telecommunication by signal output apparatus.
A kind of retroreflecting photoswitch the most according to claim 1, is characterized in that: described luminous organ (3) is light emitting diode；Described illuminating circuit includes the optical modulator module that Power Entry Module, rectifying and voltage-stabilizing module are connected with luminous organ (3).
A kind of retroreflecting photoswitch the most according to claim 2, is characterized in that: described light-receiving device (4) is phototriode；Described signal output apparatus includes signal amplification module, modulation circuit module, clocked logic module and the signal output module being connected with light-receiving device (4).
A kind of retroreflecting photoswitch the most according to claim 3, is characterized in that: described Power Entry Module includes power input interface；Described rectifying and voltage-stabilizing module includes power supply chip (81)；Described power supply chip (81) is provided with Vout interface, Vin interface and GND interface；Described Vout interface with GND interface respectively two ends with the first electric capacity (82) be connected, and GND interface is connected with earth terminal；Described Vin interface with GND interface respectively two ends with the second electric capacity (83) be connected, and be parallel with the output branch road that the first resistance (84), the first diode (85) and out splice going splice (86) are constituted at the two ends of the second electric capacity (83).
A kind of retroreflecting photoswitch the most according to claim 4, is characterized in that: described PCB assembly (2) includes processing chip (87)；Described optical modulator module includes light modulation audion (88)；The colelctor electrode of described light modulation audion (88) is connected with described out splice going splice (86), and luminous organ (3) connection afterwards described in base series processes the GP0 interface of chip (87).
A kind of retroreflecting photoswitch the most according to claim 5, is characterized in that: the colelctor electrode of described light-receiving device (4) and base stage connect power input interface by the second resistance, and connecting at base terminal has the polar capacitor (89) of ground connection；The emitter stage of described light-receiving device (4) processes the GP2 interface of chip (87) by variable resistance (91) and the 3rd electric capacity (92) and amplifying triode (93) connection.
A kind of retroreflecting photoswitch the most according to claim 6, is characterized in that: described switch case (1) is square plastic casing；The described PCB assembly (2) of installation, luminous organ (3) and the cavity (11) of light-receiving device (4) it is shaped with in the inside of switch case (1)；The PCB fixed plate (21) that be connected fixing with PCB assembly (2) it is provided with on the top of cavity (11)；Described luminous organ (3) and light-receiving device (4) are fixed on the side of described PCB assembly (2)；The sidewall of described switch case (1) is shaped with the fenestra of transmitted light, is installed with filter lens (12) at described fenestra.
A kind of retroreflecting photoswitch the most according to claim 7, it is characterized in that: in described cavity (11), be provided with light source fixing part (5), described light source fixing part (5) is arranged between filter lens (12) and PCB assembly (2), is shaped with two energy the first through hole (51) by light and the second through hole (52) in the inside of light source fixing part (5)；Described luminous organ (3) is fixed on the inner of the first through hole (51)；Described light-receiving device (4) is fixed on the inner of the second through hole (52).
A kind of correlation photoswitch the most according to claim 8, it is characterized in that: the outer end of described first through hole (51) is installed with the first collecting lens (53), be shaped with the first bundle unthreaded hole (54) at the middle part of the first through hole (51)；The outer end of described second through hole (52) is installed with the second light transparent lens (55), is shaped with the second bundle unthreaded hole (56) at the middle part of the second through hole (52)；The both sides of described light source fixing part (5) are shaped with fixes the ladder bayonet socket (57) being connected with switch case (1) inwall.
A kind of correlation photoswitch the most according to claim 9, is characterized in that: the top of described switch case (1) is provided with light guide plate (6) and the adjusting knob (7) being connected with PCB assembly (2)；Described light guide plate (6) lower section is provided with power supply indicator (94) and working station indicator (95), and described power supply indicator (94) is connected with power interface by power branch；Described working station indicator (95) is connected with the emitter stage of display lamp audion (96), the base stage connection of described display lamp audion (96) processes the GP5 interface of chip (87), and colelctor electrode connects power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610368739.7A CN105897237B (en) | 2016-05-30 | 2016-05-30 | A kind of retroreflecting optoelectronic switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610368739.7A CN105897237B (en) | 2016-05-30 | 2016-05-30 | A kind of retroreflecting optoelectronic switch |
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| CN105897237A true CN105897237A (en) | 2016-08-24 |
| CN105897237B CN105897237B (en) | 2018-11-13 |
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| CN201610368739.7A Active CN105897237B (en) | 2016-05-30 | 2016-05-30 | A kind of retroreflecting optoelectronic switch |
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Cited By (2)
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| CN107332550A (en) * | 2017-08-16 | 2017-11-07 | 温州洞头恒达冶金设备制造有限公司 | A kind of correlation optoelectronic switch |
| CN114111582A (en) * | 2021-12-13 | 2022-03-01 | 西华大学 | Pile foundation heavy hammer alignment device and application method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107332550A (en) * | 2017-08-16 | 2017-11-07 | 温州洞头恒达冶金设备制造有限公司 | A kind of correlation optoelectronic switch |
| CN107332550B (en) * | 2017-08-16 | 2020-04-24 | 温州洞头恒达冶金设备制造有限公司 | Correlation formula photoelectric switch |
| CN114111582A (en) * | 2021-12-13 | 2022-03-01 | 西华大学 | Pile foundation heavy hammer alignment device and application method |
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