CN204697040U - A kind of Width funtion groove type photoelectric switch - Google Patents
A kind of Width funtion groove type photoelectric switch Download PDFInfo
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- CN204697040U CN204697040U CN201420795094.1U CN201420795094U CN204697040U CN 204697040 U CN204697040 U CN 204697040U CN 201420795094 U CN201420795094 U CN 201420795094U CN 204697040 U CN204697040 U CN 204697040U
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- 230000005693 optoelectronics Effects 0.000 claims description 5
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- 230000005622 photoelectricity Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 29
- 238000001514 detection method Methods 0.000 description 2
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Abstract
The utility model discloses a kind of Width funtion groove type photoelectric switch, comprising: Width funtion constant current transmitter module, Width funtion receiver module, Width funtion hysteresis processing module and output module.The utility model groove type photoelectric switch, compared with existing grooved photoelectricity, employing discrete device constructs the constant-current source of Width funtion input, two kinds of Width funtion receiver modules, the hysteresis comparison circuit of Width funtion, normally-open normally-close two-way of band short-circuit protection export simultaneously.
Description
Technical Field
The invention belongs to a wide voltage groove type photoelectric switch.
Background
The groove-type photoelectric switch is a real opposite-emitting photoelectric switch, is called a U-type photoelectric switch, is an infrared sensing photoelectric product, is formed by combining an infrared emitting tube and an infrared receiving tube, determines the distance between the intensity of a sensing receiving model and a receiving signal by the groove width, takes light as a medium, and receives and converts infrared light between a luminous body and a luminous body to detect the position of an object. The groove-type photoelectric switch is also contactless in a proximity switch, is less restricted by a detected body, has fixed detection distance, high reaction frequency and high detection precision, and can detect small objects. The application is very wide.
Disclosure of Invention
The invention aims to solve the technical problem of providing a better groove-shaped photoelectric switch which has the technical advantages of stable performance and short-circuit protection.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a wide voltage slot-type optoelectronic switch comprising: the device comprises a wide voltage constant current transmitting module, a wide voltage receiving module, a wide voltage hysteresis processing module and an output module.
Further, it is preferable that the wide voltage input constant current source module includes: the infrared emission tube comprises two PNP triodes, wherein a constant current value can be stably output when wide voltage is input by 5-24V and passes through Q1, R1 and Q2, and a collector of the Q2 triode outputs constant current to drive an infrared emission tube LED1, so that the constant light emitting power of the infrared emission tube is ensured when the wide voltage is input by 5-24V, and the stable receiving of the infrared emission tube is ensured.
Further, it is preferable that the wide voltage receiving module includes: the infrared light emitting diode comprises an input end of a power supply, a phototriode LED2 and an NPN triode Q3, wherein when the LED2 receives infrared light, the voltage of a base electrode of the Q3 gradually becomes low, and an output signal of a collector electrode gradually becomes high. When the LED2 does not receive infrared light, the Q3 base voltage is high and the collector output signal gradually goes low.
Further, it is preferable that the wide voltage receiving module includes: the infrared light emitting diode comprises an input end of a power supply, a phototriode LED2 and an NPN triode Q3, wherein when the LED2 receives infrared light, the voltage of a base electrode of the Q3 gradually becomes high, and an output signal of a collector electrode gradually becomes low. When the LED2 does not receive infrared light, the Q3 base is low and the collector output signal is gradually high.
Further, preferably, the wide voltage hysteresis circuit module includes an input terminal of a power supply of 5 to 24V and two PNP triodes, wherein when the wide voltage is input at 5 to 24V, the wide voltage is output according to a change signal provided by the receiving module, and after passing through the triodes Q3 and Q4, the change signal has a threshold comparison judgment of a constant return difference value, and a high level signal or a low level signal is output.
Further, it is preferable that the output module has a normally open output, a normally closed output and a short circuit protection part, wherein the output composed of Q7 and the outputs composed of Q8 and Q9 are just a pair of outputs with opposite properties, and there are a group of normally open outputs and a group of normally closed outputs regardless of the input signals, and furthermore, the output terminal is provided with self-recovery fuses PT1 and PT2, thereby realizing the output short circuit protection function.
Compared with the existing groove type photoelectricity, the groove type photoelectricity switch adopts discrete devices to construct a constant current source with wide voltage input, two wide voltage receiving modules, a hysteresis comparison circuit of wide voltage and a normally open and normally closed two-path simultaneous output with short-circuit protection.
The characteristic circuits ensure that the transmitting power of the transmitting module is kept constant when the wide voltage is input at 5-24V, the signal of the receiving module is stable, and the return difference value of the wide voltage hysteresis is kept constant. Therefore, the product can work under wide voltage 5-24V, and the normally open and normally closed two paths can be output simultaneously, so that the performance is stable and the short-circuit protection is provided.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The present invention will be described in detail below with reference to the accompanying drawings so that the above advantages of the present invention will be more apparent. Wherein,
FIG. 1 is a schematic diagram of the structure of a wide voltage slot type optoelectronic switch of the present invention;
FIG. 2 is an overall circuit diagram of a wide voltage receiving module of the wide voltage slot type photoelectric switch of the present invention;
FIG. 3 is an overall circuit diagram of a wide voltage receiving module of the wide voltage slot type photoelectric switch of the present invention;
FIG. 4 is a circuit diagram of a wide voltage input constant current source module of the wide voltage slot type photoelectric switch of the present invention;
FIG. 5 is a circuit diagram of a wide voltage receiving module of the wide voltage slot type photoelectric switch of the present invention;
FIG. 6 is a circuit diagram of a wide voltage receiving module of the wide voltage slot type photoelectric switch of the present invention;
FIG. 7 is a circuit diagram of a wide voltage hysteresis circuit module of the wide voltage slot type photoelectric switch of the present invention;
fig. 8 is a circuit diagram of an output module of the wide voltage slot type photoelectric switch of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention will be provided with reference to the drawings and examples, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented. It should be noted that, as long as there is no conflict, the embodiments and the features of the embodiments of the present invention may be combined with each other, and the technical solutions formed are within the scope of the present invention.
As shown in fig. 1 to 8, a wide voltage slot type photoelectric switch includes: the device comprises a wide voltage constant current transmitting module, a wide voltage receiving module, a wide voltage hysteresis processing module and an output module. Wherein, the complete circuit diagrams of the product are a diagram (2) and a diagram (3), the two diagrams are two specifications and models corresponding to the product, the circuit diagram of the transmitting module is a diagram (4), the circuit diagram of the receiving module is a diagram (5) and a diagram (6), the circuit diagram of the hysteresis processing module is a diagram (7), and the circuit diagram of the output module is a diagram (8)
Further, it is preferable that the wide voltage input constant current source module includes: the infrared emission tube comprises two PNP triodes, wherein a constant current value can be stably output when wide voltage is input by 5-24V and passes through Q1, R1 and Q2, and a collector of the Q2 triode outputs constant current to drive an infrared emission tube LED1, so that the constant light emitting power of the infrared emission tube is ensured when the wide voltage is input by 5-24V, and the stable receiving of the infrared emission tube is ensured.
Further, it is preferable that the wide voltage receiving module includes: the infrared light emitting diode comprises an input end of a power supply, a phototriode LED2 and an NPN triode Q3, wherein when the LED2 receives infrared light, the voltage of a base electrode of the Q3 gradually becomes low, and an output signal of a collector electrode gradually becomes high. When the LED2 does not receive infrared light, the Q3 base voltage is high and the collector output signal gradually goes low.
Further, it is preferable that the wide voltage receiving module includes: the infrared light emitting diode comprises an input end of a power supply, a phototriode LED2 and an NPN triode Q3, wherein when the LED2 receives infrared light, the voltage of a base electrode of the Q3 gradually becomes high, and an output signal of a collector electrode gradually becomes low. When the LED2 does not receive infrared light, the Q3 base is low and the collector output signal is gradually high.
Further, preferably, the wide voltage hysteresis circuit module includes an input terminal of a power supply of 5 to 24V and two PNP triodes, wherein when the wide voltage is input at 5 to 24V, the wide voltage is output according to a change signal provided by the receiving module, and after passing through the triodes Q3 and Q4, the change signal has a threshold comparison judgment of a constant return difference value, and a high level signal or a low level signal is output.
Further, it is preferable that the output module has a normally open output, a normally closed output and a short circuit protection part, wherein the output composed of Q7 and the outputs composed of Q8 and Q9 are just a pair of outputs with opposite properties, and there are a group of normally open outputs and a group of normally closed outputs regardless of the input signals, and furthermore, the output terminal is provided with self-recovery fuses PT1 and PT2, thereby realizing the output short circuit protection function.
Compared with the existing groove type photoelectricity, the groove type photoelectricity switch adopts discrete devices to construct a constant current source with wide voltage input, two wide voltage receiving modules, a hysteresis comparison circuit of wide voltage and a normally open and normally closed two-path simultaneous output with short-circuit protection.
The characteristic circuits ensure that the transmitting power of the transmitting module is kept constant when the wide voltage is input at 5-24V, the signal of the receiving module is stable, and the return difference value of the wide voltage hysteresis is kept constant. Therefore, the product can work under wide voltage 5-24V, and the normally open and normally closed two paths can be output simultaneously, so that the performance is stable and the short-circuit protection is provided.
Specifically, as shown in fig. 2, the wide voltage receiving module of an embodiment is a schematic diagram, and when receiving infrared light, the indicator light is always on.
In fig. 2, 5 to 24V is an input end of a power supply, the LED1 is an infrared emission lamp, the LED2 is a phototransistor, the U1 is a double PNP triode, and the LED is an indicator lamp; the LED2 receives the infrared light of the LED1, and after signal processing, the LED indicator light is on, no signal is output at the output 1 end of the NPN collector, and a signal is output at the output 2 end of the NPN collector. The specific working principle is as follows.
Fig. 3 is a schematic diagram of a wide voltage receiving module of an embodiment, which is used to receive infrared light and the indicator light is normally off.
The power supply comprises a power supply, an LED1, an LED2, a phototriode, a U1 and an indicator light, wherein 5-24V is an input end of the power supply, the LED1 is an infrared emission lamp, the LED2 is a phototriode, the U1 is a double PNP triode, and the LED is the indicator light; the LED2 receives the infrared light of the LED1, the LED indicator lights are turned off after signal processing, the output 1 end of the NPN collector has signal output, and the output 2 end of the NPN collector has no signal output. The specific working principle is as follows.
As shown in fig. 4, the wide voltage input constant current source module mainly includes two PNP transistors. The wide voltage input is 5-24V, and a constant current value can be stably output through Q1, R1 and Q2. The collector of the Q2 triode outputs constant current to drive the infrared emission tube LED1, so that the luminous power of the infrared emission tube is kept constant when wide voltage is input at 5-24V, and the following receiving stability is ensured.
Wherein, 5-24V is the power output end, please look over the general circuit diagram. The module is mainly a constant current module with wide voltage input, and provides constant current to drive the infrared tube LED1 to emit infrared light with constant power to irradiate the phototriode LED2 of the receiving module.
The wide voltage receiving module can be divided into two receiving schemes according to the on-off condition of the indicator light in the incident light, and the receiving schemes are respectively selected by different models for customers.
As shown in fig. 5, the wide voltage receiving module of an embodiment is configured to receive infrared light, and the indicator light is turned on. When the infrared light is not received, the indicator light is turned off. When infrared light irradiates the module and the phototriode LED2 receives the infrared light, the voltage of the base of the Q3 gradually becomes low, and the output signal of the collector gradually becomes high. The change signal is processed by hysteresis comparison at the back, high level is output, and the indicator light is on; when the LED2 does not receive infrared light, the Q3 base voltage is high and the collector output signal gradually goes low. The change signal is processed by hysteresis comparison at the back, low level is output, and the indicator light is turned off;
wherein, 5-24V is the power output end, please look over the general circuit diagram. The LED2 is a phototriode receiving infrared light of the emitting module LED1, the hysteresis circuit please look at the hysteresis circuit module behind, the LED is an indicator light, and the output change signal of the receiving module is received by the hysteresis module.
As shown in fig. 6, the wide voltage receiving module of an embodiment is configured to turn off the indicator light when receiving infrared light. When the infrared light is not received, the indicator light is on. When infrared light irradiates the module and the phototriode LED2 receives the infrared light, the voltage of the base of the Q3 gradually becomes high, and the output signal of the collector gradually becomes low. The change signal is processed by hysteresis comparison at the back, low level is output, and the indicator light is turned off; when the LED2 does not receive infrared light, the Q3 base voltage is low and the collector output signal gradually goes high. The change signal is processed by hysteresis comparison at the back, high level is output, and the indicator light is on;
in the figure, 5-24V is the power output end, please look over the overall circuit diagram. The LED3 is a phototriode receiving infrared light of the emitting module LED1, the hysteresis circuit please look at the hysteresis circuit module behind, the LED is an indicator light, and the output change signal of the receiving module is received by the hysteresis module.
As shown in fig. 7, the wide voltage hysteresis circuit module mainly includes two PNP triodes, and outputs a high level or low level signal according to the change signal provided by the receiving module after passing through the triodes Q3 and Q4 and the threshold comparison and judgment that the change signal has a constant return difference value when the wide voltage is input at 5-24V.
In the figure, 5-24V is the power output end, please look over the overall circuit diagram. The signal input end is connected with the signal output by the receiving module, the output of the hysteresis output signal is connected with the anode of the LED, and the specific connection point is shown in figure (1) or figure (2). Q5, Q6 in the figure are two PNP transistors, replaced by U1 dual PNP devices in the overall circuit diagram above.
As shown in fig. 8, the output module includes a normally open output, a normally closed output and a short circuit protection portion. The output formed by Q7 and the output formed by Q8 and Q9 are just a pair of outputs with opposite properties. Regardless of the input signal, there are one set of normally open outputs and one set of normally closed outputs. In addition, the output end is provided with self-recovery fuses PT1 and PT2, so that the output short-circuit protection function is realized.
In the figure, 5-24V is the power output end, please look over the overall circuit diagram. The signal input end is connected with the cathode of the LED of the indicator light, and is specifically connected with the figure (1) or the figure (2). NPN collector output 1 and NPN collector output 2 are a pair of output signals of the product.
It should be noted that for simplicity of description, the above method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present application is not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required in this application.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A wide voltage slot type optoelectronic switch, comprising: wide voltage constant current emission module, wide voltage receiving module, wide voltage hysteresis processing module and output module, the constant current source module of wide voltage input includes: the LED driving circuit comprises an input end of a 5-24V power supply and two PNP triodes, wherein when wide voltage is 5-24V input, a constant current value is stably output after passing through Q1, R1 and Q2, and a collector of the Q2 triode outputs constant current to drive an infrared emission tube LED1, so that the constant light emitting power of the infrared emission tube is ensured when the wide voltage is 5-24V input, and the stable receiving of the infrared emission tube is ensured.
2. The wide voltage slot type optoelectronic switch of claim 1, wherein the wide voltage receiving module comprises: the infrared light emitting diode comprises an input end of a 5-24V power supply, a phototriode LED2 and an NPN triode Q3, wherein when the LED2 receives infrared light, the base voltage of the Q3 gradually becomes low, the output signal of a collector gradually becomes high, and when the LED2 does not receive the infrared light, the base voltage of the Q3 is high, and the output signal of the collector gradually becomes low.
3. The wide voltage slot type optoelectronic switch of claim 1, wherein the wide voltage receiving module comprises: the infrared light emitting diode comprises an input end of a 5-24V power supply, a phototriode LED2 and an NPN triode Q3, wherein when the LED2 receives infrared light, the base voltage of the Q3 gradually becomes high, the output signal of a collector gradually becomes low, and when the LED2 does not receive the infrared light, the base voltage of the Q3 is low, and the output signal of the collector gradually becomes high.
4. The wide voltage slot type photoelectric switch of claim 1, wherein the wide voltage hysteresis circuit module comprises an input terminal of a power supply of 5-24V and two PNP transistors, wherein when the wide voltage is input at 5-24V, the wide voltage is output as a high level signal or a low level signal according to the change signal provided by the receiving module, and after passing through the transistors Q3 and Q4, the change signal has a threshold comparison judgment of a constant return difference value.
5. The wide voltage slot type photoelectric switch according to claim 1, wherein the output module has a normally open output, a normally closed output and a short circuit protection portion, wherein the output composed of Q7 and the outputs composed of Q8 and Q9 are just a pair of outputs with opposite properties, and there are one set of normally open outputs and one set of normally closed outputs regardless of the input signals, and further, the output terminals have self-recovery fuses PT1 and PT2, thereby realizing an output short circuit protection function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420795094.1U CN204697040U (en) | 2014-12-15 | 2014-12-15 | A kind of Width funtion groove type photoelectric switch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420795094.1U CN204697040U (en) | 2014-12-15 | 2014-12-15 | A kind of Width funtion groove type photoelectric switch |
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| Publication Number | Publication Date |
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| CN204697040U true CN204697040U (en) | 2015-10-07 |
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| CN201420795094.1U Expired - Fee Related CN204697040U (en) | 2014-12-15 | 2014-12-15 | A kind of Width funtion groove type photoelectric switch |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113465634A (en) * | 2021-07-13 | 2021-10-01 | 深圳市天工机械制造技术开发有限公司 | Wide voltage contact sensor |
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2014
- 2014-12-15 CN CN201420795094.1U patent/CN204697040U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113465634A (en) * | 2021-07-13 | 2021-10-01 | 深圳市天工机械制造技术开发有限公司 | Wide voltage contact sensor |
| CN113465634B (en) * | 2021-07-13 | 2024-06-11 | 深圳市天工机械制造技术开发有限公司 | Wide voltage contact sensor |
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Granted publication date: 20151007 Termination date: 20151215 |
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