CN204667093U - Transducing signal collect and transmit circuit in a kind of safety defense monitoring system - Google Patents
Transducing signal collect and transmit circuit in a kind of safety defense monitoring system Download PDFInfo
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- CN204667093U CN204667093U CN201520279457.0U CN201520279457U CN204667093U CN 204667093 U CN204667093 U CN 204667093U CN 201520279457 U CN201520279457 U CN 201520279457U CN 204667093 U CN204667093 U CN 204667093U
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Abstract
The utility model discloses the transducing signal collect and transmit circuit in a kind of safety defense monitoring system, comprise access current-limiting circuit and sensor type selection circuit, resistance type sensor signal output part is connected with sensor type selection circuit through access current-limiting circuit, sensor type selection circuit access single-chip microcomputer.The utility model utilizes single-chip microcomputer self function, the type of the sensor needing collection signal is determined by the set type out port of single-chip microcomputer, then opening resistor type sensor transformation circuit carries out signals collecting to sensor, pick-up transducers signal, then single-chip microcomputer is according to the sensor signal collected, monitor accordingly, the workplace that some easily produce beat voltage well can be adapted to by the effect accessing current-limiting circuit, considerably increase the working range of signal acquisition circuit.
Description
Technical field
The utility model relates to electronic monitoring technical field, is specially the transducing signal collect and transmit circuit in a kind of safety defense monitoring system.
Background technology
At present, the many monitorings that large quantity sensor need be adopted to carry out site environment of industry spot, sensor mostly by signal acquisition circuit by the signal transmission of collection to single-chip microcomputer to carry out the regulation and control of industry spot.These sensors are divided into resistance type sensor and amperometric sensor substantially, resistance type sensor is widely used due to cheap, but in the industry spot of some complexity, because the complex jamming signal of environment is many, only has the collection adopting amperometric sensor could solve industrial environment signal.Resistance type sensor is different with the signal acquisition circuit of amperometric sensor, along with people are to the pay attention to day by day of working environment, single signal acquisition circuit can not meet the user demand of resistance type sensor and amperometric sensor, and the workplace particularly easily producing beat voltage at some needs some special Acquisition Circuit to meet especially.
Utility model content
The purpose of this utility model is to provide the circuit of the transducing signal collect and transmit in a kind of safety defense monitoring system, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
Transducing signal collect and transmit circuit in a kind of safety defense monitoring system, comprise access current-limiting circuit and sensor type selection circuit, resistance type sensor signal output part is connected with sensor type selection circuit through access current-limiting circuit, sensor type selection circuit access single-chip microcomputer, described current-limiting control circuit comprises triode Q2, triode Q1, resistance R1, resistance R2 and resistance R3, current signal input end is connected with the base stage of triode Q2 by resistance R1, the emitter of triode Q2 is connected with triode Q1 base stage, the base stage of triode Q1 is connected with a pole of resistance R3, the collector of triode Q1 is connected with the base stage of triode Q2, the collector of triode Q1 is extremely connected with one of resistance R2, another pole of resistance R3 and the base stage of triode Q2 are connected to form loop, and another pole of resistance R2 is connected with the emitter of triode Q1 and ground connection, described sensor type selection circuit is by resistance R8, resistance R9, resistance R10, triode Q3 and triode Q4 forms, the set type out port of single-chip microcomputer connects one end of described resistance R8 and described resistance R9 respectively, the other end of described resistance R8 connects the base stage of described triode Q3, the emitter of described triode Q3 connects reference voltage, the collector of described triode Q3 connects the anode of diode D1 successively, resistance R4, resistance R5 and resistance R6, the negative electrode contact resistance R10 of described diode D1, the other end of described resistance R10 connects the IN1 port of single-chip microcomputer, the other end of described resistance R9 connects the base stage of described triode Q4, the grounded emitter of described triode Q4, the collector of described triode Q4 connects the contact of described resistance R5 and described resistance R6, one end of described resistance R6 is as sensor signal input end, one end contact resistance R7 of resistance R6, the other end of resistance R7 connects the IN2 port of single-chip microcomputer.
As the utility model further technical scheme, between described resistance R10 and the IN1 port of described single-chip microcomputer, be provided with the electric capacity C1 of one end ground connection.
As the utility model further technical scheme, between described resistance R7 and the IN2 port of described single-chip microcomputer, be provided with the electric capacity C3 of one end ground connection.
Compared with prior art, the utility model utilizes single-chip microcomputer self function, the type of the sensor needing collection signal is determined by the set type out port of single-chip microcomputer, then opening resistor type sensor transformation circuit carries out signals collecting to sensor, pick-up transducers signal, then single-chip microcomputer is according to the sensor signal collected, monitor accordingly, the workplace that some easily produce beat voltage well can be adapted to by the effect accessing current-limiting circuit, considerably increase the working range of signal acquisition circuit.
Accompanying drawing explanation
Fig. 1 is the structural representation of the transducing signal collect and transmit circuit in a kind of safety defense monitoring system of the utility model.
Embodiment
Be described in more detail below in conjunction with the technical scheme of embodiment to this patent.
Refer to Fig. 1, transducing signal collect and transmit circuit in a kind of safety defense monitoring system, comprise access current-limiting circuit and sensor type selection circuit, resistance type sensor signal output part is connected with sensor type selection circuit through access current-limiting circuit, sensor type selection circuit access single-chip microcomputer; Described current-limiting control circuit comprises triode Q2, triode Q1, resistance R1, resistance R2 and resistance R3; Current signal input end is connected with the base stage of triode Q2 by resistance R1, the emitter of triode Q2 is connected with triode Q1 base stage, the base stage of triode Q1 is connected with a pole of resistance R3, the collector of triode Q1 is connected with the base stage of triode Q2, the collector of triode Q1 is extremely connected with one of resistance R2, another pole of resistance R3 and the base stage of triode Q2 are connected to form loop, and another pole of resistance R2 is connected with the emitter of triode Q1 and ground connection; When applied signal voltage changes, Q1 emitter voltage can change, the change in voltage of Q1 emitter must cause the change of Q2 duty, the change of Q2 duty, the change of voltage on R2 can be caused again, the change of the upper voltage of R2 causes again the change of Q1 duty, so just constitutes a closed feedback loop, and the result of this backfeed loop makes the marking current of output trend towards stablizing;
Described sensor type selection circuit is by resistance R8, resistance R9, resistance R10, triode Q3 and triode Q4 forms, the set type out port of single-chip microcomputer connects one end of described resistance R8 and described resistance R9 respectively, the other end of described resistance R8 connects the base stage of described triode Q3, the emitter of described triode Q3 connects reference voltage, the collector of described triode Q3 connects the anode of diode D1 successively, resistance R4, resistance R5 and resistance R6, the negative electrode contact resistance R10 of described diode D1, the other end of described resistance R10 connects the IN1 port of single-chip microcomputer, the electric capacity C1 of one end ground connection is provided with between the IN1 port of resistance R10 and described single-chip microcomputer, the other end of described resistance R9 connects the base stage of described triode Q4, the grounded emitter of described triode Q4, the collector of described triode Q4 connects the contact of described resistance R5 and described resistance R6, one end of described resistance R6 is as sensor signal input end, one end contact resistance R7 of described resistance R6, the other end of described resistance R7 connects the IN2 port of single-chip microcomputer, the electric capacity C3 of one end ground connection is provided with between described resistance R7 and the IN2 port of described single-chip microcomputer.
The type selecting of sensor is by triode Q3, triode Q4, resistance R8 and resistance R9, and the set type out port combination of single-chip microcomputer realizes when the voltage of single-chip microcomputer set type out port is high level, triode Q4 conducting, triode Q3 turn off, now this circuit can processes sensor export 4-20mA current signal; When the voltage of the sensor set type out port of single-chip microcomputer is low level, triode Q3 conducting, triode Q4 turn off, and now, this circuit can process resistor-type sensing 0-2.5 out kilohm resistance signal.
Above the better embodiment of this patent is explained in detail, but this patent is not limited to above-mentioned embodiment, in the ken that one skilled in the relevant art possesses, various change can also be made under the prerequisite not departing from this patent aim.
Claims (3)
1. the transducing signal collect and transmit circuit in a safety defense monitoring system, it is characterized in that, comprise access current-limiting circuit and sensor type selection circuit, resistance type sensor signal output part is connected with sensor type selection circuit through access current-limiting circuit, sensor type selection circuit access single-chip microcomputer, described current-limiting control circuit comprises triode Q2, triode Q1, resistance R1, resistance R2 and resistance R3, current signal input end is connected with the base stage of triode Q2 by resistance R1, the emitter of triode Q2 is connected with triode Q1 base stage, the base stage of triode Q1 is connected with a pole of resistance R3, the collector of triode Q1 is connected with the base stage of triode Q2, the collector of triode Q1 is extremely connected with one of resistance R2, another pole of resistance R3 and the base stage of triode Q2 are connected to form loop, and another pole of resistance R2 is connected with the emitter of triode Q1 and ground connection, described sensor type selection circuit is by resistance R8, resistance R9, resistance R10, triode Q3 and triode Q4 forms, the set type out port of single-chip microcomputer connects one end of described resistance R8 and described resistance R9 respectively, the other end of described resistance R8 connects the base stage of described triode Q3, the emitter of described triode Q3 connects reference voltage, the collector of described triode Q3 connects the anode of diode D1 successively, resistance R4, resistance R5 and resistance R6, the negative electrode contact resistance R10 of described diode D1, the other end of described resistance R10 connects the IN1 port of single-chip microcomputer, the other end of described resistance R9 connects the base stage of described triode Q4, the grounded emitter of described triode Q4, the collector of described triode Q4 connects the contact of described resistance R5 and described resistance R6, one end of described resistance R6 is as sensor signal input end, one end contact resistance R7 of resistance R6, the other end of resistance R7 connects the IN2 port of single-chip microcomputer.
2. the transducing signal collect and transmit circuit in a kind of safety defense monitoring system according to claim 1, is characterized in that, is provided with the electric capacity C1 of one end ground connection between described resistance R10 and the IN1 port of described single-chip microcomputer.
3. the transducing signal collect and transmit circuit in a kind of safety defense monitoring system according to claim 1, is characterized in that, is provided with the electric capacity C3 of one end ground connection between described resistance R7 and the IN2 port of described single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520279457.0U CN204667093U (en) | 2015-05-04 | 2015-05-04 | Transducing signal collect and transmit circuit in a kind of safety defense monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520279457.0U CN204667093U (en) | 2015-05-04 | 2015-05-04 | Transducing signal collect and transmit circuit in a kind of safety defense monitoring system |
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| CN204667093U true CN204667093U (en) | 2015-09-23 |
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| CN201520279457.0U Expired - Fee Related CN204667093U (en) | 2015-05-04 | 2015-05-04 | Transducing signal collect and transmit circuit in a kind of safety defense monitoring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106102285A (en) * | 2016-08-26 | 2016-11-09 | 浙江圣火智远文化发展有限公司 | A kind of stage light control system |
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2015
- 2015-05-04 CN CN201520279457.0U patent/CN204667093U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106102285A (en) * | 2016-08-26 | 2016-11-09 | 浙江圣火智远文化发展有限公司 | A kind of stage light control system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150923 Termination date: 20160504 |