CN204945665U - A kind of on-off model harvester - Google Patents
A kind of on-off model harvester Download PDFInfo
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- CN204945665U CN204945665U CN201520456985.9U CN201520456985U CN204945665U CN 204945665 U CN204945665 U CN 204945665U CN 201520456985 U CN201520456985 U CN 201520456985U CN 204945665 U CN204945665 U CN 204945665U
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Abstract
The utility model discloses a kind of on-off model harvester, relate to signals collecting field.On-off model harvester disclosed in the utility model, comprise Acquisition Circuit, decision circuitry, connect, export according to different interface access waies the control circuit of different instruction from decision circuitry output terminal, and the commutation circuit be all connected with control circuit, Acquisition Circuit; Decision circuitry, judges the acquisition mode of current switch amount according to the current interface access way of Acquisition Circuit; Control circuit, exports different instructions to commutation circuit according to different acquisition modes; Commutation circuit, makes to form current path to gather one of interface access way of passive switch amount signal or active switch amount signal in Acquisition Circuit according to the instruction that control circuit exports.Technical solutions of the utility model can the reliable collection of flexible compatible active switch amount signal and passive switch amount signal, and realizes with low cost.
Description
Technical field
The utility model relates to signals collecting, particularly on-off model collection, belongs to signal processing technology field.
Background technology
In modern industry, the effect of on-off model is more and more important, and it is usually used in the detection of commercial unit, for commercial unit provides control signal.Along with the development of science and technology, improving constantly of automaticity, the adaptability of the collection of switch amount signal in commercial Application requires also more and more higher.
On-off model input interface generally includes two kinds of interface shapes, and one is dry contact form, and another kind is wet contact form, wherein:
Dry contact interface refers to a kind of passive switch, and interface itself does not provide power supply, can be used for gathering active switch amount signal;
Wet contact interface refers to a kind of active switch, and interface itself can provide power supply, has polarity between 2 contacts, can be used for gathering passive switch amount signal;
But in the prior art, for the collection of on-off model, the interface shape of signal access device is normally fixing, namely equipment interface can only adaptive a kind of on-off model input form, if the environment for use of this access device changes or corresponding on-off model input interface form changes, usually need the access device changing matched interfaces, the object of signals collecting could be realized.As can be seen here, in prior art, access device is in urgent need to be improved for the versatility of switch value input interface.
Utility model content
Technical problem to be solved in the utility model is, provides a kind of on-off model harvester, with the reliable collection of compatible active switch amount signal and passive switch amount signal.
In order to solve the problems of the technologies described above, the utility model discloses a kind of on-off model harvester, comprise: to gather the Acquisition Circuit of one of active switch amount or the interface access way gathering passive switch amount acquisition interface on-off model, also comprise decision circuitry, connect from described decision circuitry output terminal, export according to different interface access waies the control circuit of different instruction, and the commutation circuit be all connected with described control circuit, Acquisition Circuit;
Wherein, described Acquisition Circuit at least comprises three input ends: the first voltage acquisition input end, the second voltage acquisition input end and interface ground;
Described decision circuitry, the acquisition mode of current switch amount is judged according to the current interface access way of described Acquisition Circuit, when the interface access way of described Acquisition Circuit be the first voltage acquisition input end and the second voltage acquisition input end time, judge that acquisition mode is as gathering active switch amount; When the interface access way of described Acquisition Circuit be the second voltage acquisition input end and interface ground time, judge that acquisition mode is as collection passive switch amount;
Described control circuit, exports different instructions to described commutation circuit according to different acquisition modes;
Described commutation circuit, makes to form current path to gather one of interface access way of passive switch amount signal or active switch amount signal in described Acquisition Circuit according to the instruction that described control circuit exports.
Alternatively, in above-mentioned on-off model harvester, described commutation circuit comprises: coil is arranged on the relay (SW) between described control circuit output terminal, and the common port contact of described relay (SW) and the first free end contact, the second free end contact form the current path gathering passive switch amount signal or gather active switch amount signal respectively.
Alternatively, in above-mentioned on-off model harvester, described control circuit comprises: the first divider resistance (R3), the second divider resistance (R4) and NPN type triode (Q1), wherein:
Described first divider resistance (R3) be connected in series and the second divider resistance (R4) are arranged between the output terminal of described decision circuitry, and described first divider resistance (R3) is connected with the base stage of described NPN type triode (Q1) with the series connection point of the second divider resistance (R4), the emitter of described NPN type triode (Q1) is also connected with signal ground;
Coil one end of described relay (SW) is connected with signal power source (VCC), the other end is connected with the emitter of described NPN type triode (Q1), and its first free end contact is connected with interface power (VCC_PORT).
Alternatively, in above-mentioned on-off model harvester, fly-wheel diode (D2) is set between signal power source (VCC) and the collector of described NPN type triode (Q1).
Alternatively, in above-mentioned on-off model harvester, the coil other end of described relay (SW) is connected with the emitter of described NPN type triode (Q1) by voltage stabilizing diode (D3).
Alternatively, in above-mentioned on-off model harvester, described Acquisition Circuit comprises: the first current-limiting resistance (R1), the second current-limiting resistance (R2) optocoupler (U1), pull-up resistor (R5); Wherein:
One end of described first current-limiting resistance (R1) is connected with the first voltage acquisition input end, the other end is connected with the second free end contact of described relay (SW), second current-limiting resistance (R2) one end is connected with described second voltage acquisition input end, the other end is connected with the input side negative pole of described optocoupler (U1), first free end contact of described relay (SW) is connected with interface power (VCC_PORT), and the coil of described relay (SW) is arranged between described decision circuitry output terminal;
The input side positive pole of described optocoupler (U1) is connected with the common port contact of described relay (SW), the output head anode of described optocoupler (U1) is connected with external power supply (VDD) by pull-up resistor (R5), and is the output terminal of described on-off model Acquisition Circuit.
Alternatively, in above-mentioned on-off model harvester, hold-off diode (D1) is set between the input cathode of described second current-limiting resistance (R2) one end and described optocoupler (U1).
Compared with prior art, the on-off model harvester that the utility model embodiment proposes can the reliable collection of flexible compatible active switch amount signal and passive switch amount signal, and realize with low cost, effectively extend access device multiplexing/range of application.
Accompanying drawing explanation
The switch acquisition device schematic block diagram that Fig. 1 provides for the utility model embodiment;
The circuit diagram of the switch acquisition device that Fig. 2 provides for the utility model embodiment.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearly understand, hereafter will be described in further detail technical solutions of the utility model by reference to the accompanying drawings.It should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine arbitrarily mutually.
At present, switching value is divided into active switch amount signal and passive switch amount signal, active switch amount signal refers to the signal that "ON" and "off" state are chargeds, for the collection of this on-off model, switch value input interface does not need to provide power supply, usually occurs with the form of dry contact input interface; Passive switch amount signal refers to the signal that "ON" and "off" state are not chargeds, and for the collection of this on-off model, switch value input interface needs to provide power supply, usually occurs with the form of wet contact input interface.Therefore by adopting different switch interface forms to different switch acquisition modes, the flexible conversion to active switch amount signal and passive switch amount signals collecting can be realized.
Based on above-mentioned thought, the utility model embodiment provides a kind of switch acquisition device, can the collection of compatible active switch amount signal and passive switch amount signal, shown in figure 1, it at least comprises: Acquisition Circuit, decision circuitry, control circuit and commutation circuit, wherein:
Acquisition Circuit, can to gather one of active switch amount or the interface access way gathering passive switch amount acquisition interface on-off model, and it at least comprises three input ends: the first voltage acquisition input end, the second voltage acquisition input end and interface ground.
Decision circuitry, for judging the acquisition mode of current switch amount according to the current input end access way of Acquisition Circuit;
Particularly: when the input end access way of Acquisition Circuit is the first voltage acquisition input end and the second voltage acquisition input end, then decision circuitry judges that current acquisition mode is as gathering active switch amount; When the interface access way of Acquisition Circuit is the second voltage acquisition input end and interface ground, then judge that current acquisition mode is as gathering passive switch amount.
Control circuit, connects with decision circuitry output terminal and the acquisition mode of the current switch amount judged according to decision circuitry exports and corresponding is indicated to commutation circuit.
Commutation circuit, is all connected with control circuit, Acquisition Circuit, and commutation circuit makes to form current path to gather one of access way of active switch amount or passive switch amount in Acquisition Circuit according to the instruction that control circuit exports.
Visible, by foregoing circuit, provide a kind of can the compatible on-off model harvester gathering active switch amount or passive switch amount, effectively extend the application scenarios scope that on-off model gathers.
For making the purpose of this utility model, technical scheme and advantage clearly understand, hereafter will be described in further detail technical solutions of the utility model by reference to the accompanying drawings.It should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine arbitrarily mutually.
Below for Fig. 2, the specific implementation of said apparatus being described, wherein in order to make diagram more succinct, eliminating decision circuitry part:
Commutation circuit comprises: coil is arranged on the relay SW between control circuit output terminal;
Control circuit comprises: the first divider resistance R3, the second divider resistance R4 and NPN type triode Q1, wherein: the first divider resistance R3 be connected in series and the second divider resistance R4 is arranged between the output terminal of described decision circuitry, and the first divider resistance R3 is connected with the base stage of described NPN type triode Q1 with the series connection point of the second divider resistance R4, the emitter of NPN type triode Q1 is also connected with signal ground; Coil one end of relay SW is connected with signal power source VCC, and the coil other end of relay SW is connected with the collector of NPN type triode Q1, and its first free end contact is connected with interface power VCC_PORT.
Acquisition Circuit comprises: the first current-limiting resistance R1, the second current-limiting resistance R2, optocoupler U1, pull-up resistor R5; Wherein: one end of the first current-limiting resistance R1 is connected with the first voltage acquisition input end, the other end is connected with the second free end contact of relay SW, second current-limiting resistance R2 one end is connected with the second voltage acquisition input end, the other end is connected with the input side negative pole of optocoupler U1, the first free end contact of relay SW is connected with interface power VCC_PORT, and the coil of relay SW is arranged between decision circuitry output terminal; The input side positive pole of optocoupler U1 is connected with the common port contact of relay SW, and the output head anode of optocoupler U1 is connected with external power supply VDD by pull-up resistor R5, and the output terminal of optocoupler U1 is the output terminal of on-off model harvester.
Above-mentioned switch acquisition device is in order to compatibility collection active switch amount and passive switch amount, the connection terminal with at least 3 external pins can be utilized, wherein, 3 pins access the first voltage acquisition input end respectively, second voltage acquisition input end and interface ground, when use first voltage acquisition input end, second voltage acquisition input end is as on-off model Gather and input end, then decision circuitry (not showing in Fig. 2) can judge that interface is gather active switch amount, and be active switch amount due to what gather, now the first voltage acquisition input end is connected with the positive pole of wet contact interface, second voltage acquisition input end is connected with the negative pole of wet contact interface, and when use second voltage acquisition input end, interface ground are as switching signal Gather and input end, then decision circuitry judges that interface is as gathering passive switch amount, and be passive switch amount due to what gather, so the pin of switching signal Gather and input end need not distinguish the connection polarity with dry contact interface, for same acquisition interface, collection passive switch amount signal still gathers active switch amount signal and at a time selects an existence.Based on the configuration of above-mentioned external pin, the course of work of said apparatus is as follows:
When judging use second voltage acquisition input end, when interface ground is as switching signal Gather and input end, namely interface is current for gathering passive switch amount signal, according to determining circuit pathways to select control mode signal, (in Fig. 2, control signal illustrates with the MODE_CTL of high level state in mode in the output of the control circuit be connected with the output terminal of decision circuitry, typically, can be 3.3V), then dividing potential drop is carried out by the first divider resistance R3 and the second divider resistance R4, and export dividing point voltage to NPN type triode Q1 base stage, cause NPN type triode Q1 saturation conduction, thus, when the dry contact of external interface connected collection passive switch amount signal closes, current path is formed between " coil-Q1 collector-Q1 emitter-signal ground of signal power source VCC-relay SW ", the coil of relay SW has electric current to flow through, the common port contact of relay SW is caused to be connected with the first free end contact (normally opened contact), thus, form the current path of " the common port contact-optocoupler U1 input side-the second voltage acquisition input end-GND_PORT of the first free end contact-SW of interface power VCC_PORT-SW ", the light emitting diode forward conduction of optocoupler U1 inside is luminous, now the phototriode of its inside is also by conducting, thus, the light emitting diode conducting of optocoupler U1 inside, thus, optocoupler U1 output terminal exports a low level and is used as collection signal ALM_IN for external circuit, and external interface connected collection passive switch amount signal dry contact disconnect time, the current path of the LEDs ON of optocoupler U1 inside is caused no longer to exist, thus, optocoupler U1 output terminal exports a high level signal AIM_IN by the effect of pull-up resistor R5 and external power VDD, is used as collection signal for external circuit,
When judging use first voltage acquisition input end, when second voltage acquisition input end is as switching signal Gather and input end, namely interface is current for gathering active switch amount signal, according to determining circuit pathways to select control mode signal, (in Fig. 2, the MODE_CTL of control signal low level state illustrates in mode in the output of the control circuit be connected with the output terminal of decision circuitry, typically, can be 0V), thus, when the wet contact gathering active switch amount signal closes, NPN type triode Q1 can not conducting, the coil of relay SW also can not obtain enough electric currents, therefore, the common port contact of relay SW is connected with the second free end contact (normally closed contact), now, form the current path of " the common port contact-optocoupler U1 input side-the second voltage acquisition input end of the second free end contact-SW of first voltage acquisition input end-the first current-limiting resistance R1-SW ", the light emitting diode forward conduction of optocoupler U1 inside is luminous, now the phototriode of its inside is also by conducting, thus, the light emitting diode conducting of optocoupler U1 inside, thus, optocoupler output terminal exports a low level signal AIM_IN, collection signal is used as external circuit, and when the wet contact gathering active switch amount signal disconnects, the current path of the LEDs ON of optocoupler U1 inside is caused no longer to exist, thus, optocoupler output terminal exports a high level signal AIM_IN by the effect of pull-up resistor R5 and external power VDD, collection signal is used as external circuit.
In the above-described embodiments, it should be noted is that: the decision circuitry that Fig. 2 is not demonstrated, any typical circuit of the prior art can be utilized to realize, as long as it can judge that three input ends in corresponding on-off model Acquisition Circuit are current effective for which two, can be detected by physics mode, also can be realized by different modes such as the detections for each pin level, not repeat them here.
Visible by the above-mentioned course of work, utilize a set of hardware can realize selection and the switching of active switch amount signals collecting and passive switch amount signals collecting by controlled configuration, by optocoupler to the detection of collection signal and from on-off model to the conversion of logic low and high level, simplify gatherer process, improve the compatibility in multi-path-apparatus switch acquisition process simultaneously, effectively meet the demand of different scene application.
In order to make the switch acquisition device proposed in above-described embodiment, there is higher reliability, preferably, in described switching mode control circuit, can arrange sustained diode 2 between signal power source VCC and the collector of NPN type triode Q1, the negative electrode of this sustained diode 2 is connected with signal power source VCC; This be due to transferred to by height when peripheral mode control signal MODE_CTL output level low after, NPN type triode Q1 becomes cut-off from saturated, at this moment the coil of relay SW makes wherein electric current lose distribution channel suddenly due to inertia effect, if without sustained diode 2, larger inverse electromotive force is produced by these coil two ends, magnitude of voltage can reach tens of volt, this voltage adds, and the collector that VCC voltage acts on NPN type triode Q1 is enough to damage triode, therefore, the effect of sustained diode 2 is for inverse electromotive force provides discharge loop.
Can also be preferably, the coil other end of relay SW is connected with the emitter of NPN type triode Q1 by a voltage stabilizing diode D3, in order to the voltage swing of restriction when NPN type triode Q1 saturation conduction and when turning off cut-off between transistor emitter and collector, ensure that NPN type triode Q1 is not fragile.
In addition, in switch quantity acquisition circuit, preferably, between input side negative pole (light-emitting diode tube cathode) side of second current-limiting resistance R2 one end and optocoupler U1, hold-off diode D1 can be set, the negative electrode of this hold-off diode D1 is connected with second current-limiting resistance R2 one end, and the optocoupler that hold-off diode D1 can be used for preventing from causing because of external interface reverse power connection damages.
The above, be only preferred embodiments of the present utility model, is not intended to limit this and implements novel protection domain.All within spirit of the present utility model and principle, any amendment made, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (7)
1. an on-off model harvester, comprise: to gather the Acquisition Circuit of one of active switch amount or the interface access way gathering passive switch amount acquisition interface on-off model, it is characterized in that, also comprise decision circuitry, connect from described decision circuitry output terminal, export according to different interface access waies the control circuit of different instruction, and the commutation circuit be all connected with described control circuit, Acquisition Circuit;
Wherein, described Acquisition Circuit at least comprises three input ends: the first voltage acquisition input end, the second voltage acquisition input end and interface ground;
Described decision circuitry, the acquisition mode of current switch amount is judged according to the current interface access way of described Acquisition Circuit, when the interface access way of described Acquisition Circuit be the first voltage acquisition input end and the second voltage acquisition input end time, judge that acquisition mode is as gathering active switch amount; When the interface access way of described Acquisition Circuit be the second voltage acquisition input end and interface ground time, judge that acquisition mode is as collection passive switch amount;
Described control circuit, exports different instructions to described commutation circuit according to different acquisition modes;
Described commutation circuit, makes to form current path to gather one of interface access way of passive switch amount signal or active switch amount signal in described Acquisition Circuit according to the instruction that described control circuit exports.
2. on-off model harvester as claimed in claim 1, it is characterized in that, described commutation circuit comprises: coil is arranged on the relay (SW) between described control circuit output terminal, and the common port contact of described relay (SW) and the first free end contact, the second free end contact form the current path gathering passive switch amount signal or gather active switch amount signal respectively.
3. on-off model harvester as claimed in claim 2, it is characterized in that, described control circuit comprises: the first divider resistance (R3), the second divider resistance (R4) and NPN type triode (Q1), wherein:
Described first divider resistance (R3) be connected in series and the second divider resistance (R4) are arranged between the output terminal of described decision circuitry, and described first divider resistance (R3) is connected with the base stage of described NPN type triode (Q1) with the series connection point of the second divider resistance (R4), the emitter of described NPN type triode (Q1) is also connected with signal ground;
Coil one end of described relay (SW) is connected with signal power source (VCC), the other end is connected with the emitter of described NPN type triode (Q1), and its first free end contact is connected with interface power (VCC_PORT).
4. on-off model harvester as claimed in claim 3, is characterized in that, arrange fly-wheel diode (D2) between signal power source (VCC) and the collector of described NPN type triode (Q1).
5. on-off model harvester as claimed in claim 3, is characterized in that, the coil other end of described relay (SW) is connected with the emitter of described NPN type triode (Q1) by voltage stabilizing diode (D3).
6. the on-off model harvester according to any one of claim 2 to 5, it is characterized in that, described Acquisition Circuit comprises: the first current-limiting resistance (R1), the second current-limiting resistance (R2) optocoupler (U1), pull-up resistor (R5); Wherein:
One end of described first current-limiting resistance (R1) is connected with the first voltage acquisition input end, the other end is connected with the second free end contact of described relay (SW), second current-limiting resistance (R2) one end is connected with described second voltage acquisition input end, the other end is connected with the input side negative pole of described optocoupler (U1), first free end contact of described relay (SW) is connected with interface power (VCC_PORT), and the coil of described relay (SW) is arranged between described decision circuitry output terminal;
The input side positive pole of described optocoupler (U1) is connected with the common port contact of described relay (SW), the output head anode of described optocoupler (U1) is connected with external power supply (VDD) by pull-up resistor (R5), and is the output terminal of described on-off model Acquisition Circuit.
7. on-off model harvester as claimed in claim 6, is characterized in that, arrange hold-off diode (D1) between the input cathode of described second current-limiting resistance (R2) one end and described optocoupler (U1).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107193270A (en) * | 2017-05-31 | 2017-09-22 | 北京广利核系统工程有限公司 | Digital output passage self diagnosis detection circuit, detection means and detection method |
| CN108107357A (en) * | 2017-12-27 | 2018-06-01 | 金卡智能集团股份有限公司 | Switching signal detection circuit with self-diagnostic function |
| CN108983696A (en) * | 2018-09-06 | 2018-12-11 | 北京优航机电技术有限公司 | A kind of online switching detection method of PLC different type digital quantity signal and device |
| CN109375536A (en) * | 2018-09-27 | 2019-02-22 | 郑州华力信息技术有限公司 | Multifunctional status amount detection module device |
| CN111162516A (en) * | 2019-10-22 | 2020-05-15 | 浙江中控技术股份有限公司 | Current output power distribution switching circuit |
| CN112783042A (en) * | 2020-12-31 | 2021-05-11 | 瑞斯康达科技发展股份有限公司 | Signal acquisition circuit and acquisition method |
| CN112992619A (en) * | 2021-02-07 | 2021-06-18 | 青岛博宁福田智能交通科技发展有限公司 | Emergency button switch interface and subway gate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107193270A (en) * | 2017-05-31 | 2017-09-22 | 北京广利核系统工程有限公司 | Digital output passage self diagnosis detection circuit, detection means and detection method |
| CN107193270B (en) * | 2017-05-31 | 2024-01-23 | 北京广利核系统工程有限公司 | Digital quantity output channel self-diagnosis detection circuit, detection device and detection method |
| CN108107357A (en) * | 2017-12-27 | 2018-06-01 | 金卡智能集团股份有限公司 | Switching signal detection circuit with self-diagnostic function |
| CN108983696A (en) * | 2018-09-06 | 2018-12-11 | 北京优航机电技术有限公司 | A kind of online switching detection method of PLC different type digital quantity signal and device |
| CN109375536A (en) * | 2018-09-27 | 2019-02-22 | 郑州华力信息技术有限公司 | Multifunctional status amount detection module device |
| CN111162516A (en) * | 2019-10-22 | 2020-05-15 | 浙江中控技术股份有限公司 | Current output power distribution switching circuit |
| CN112783042A (en) * | 2020-12-31 | 2021-05-11 | 瑞斯康达科技发展股份有限公司 | Signal acquisition circuit and acquisition method |
| CN112992619A (en) * | 2021-02-07 | 2021-06-18 | 青岛博宁福田智能交通科技发展有限公司 | Emergency button switch interface and subway gate |
| CN112992619B (en) * | 2021-02-07 | 2022-06-03 | 青岛博宁福田智能交通科技发展有限公司 | Emergency button switch interface and subway floodgate machine |
| CN113933693A (en) * | 2021-09-28 | 2022-01-14 | 科大智能电气技术有限公司 | Detection circuit suitable for multiple types of input and output and control method |
| CN113933693B (en) * | 2021-09-28 | 2023-10-20 | 科大智能电气技术有限公司 | Detection circuit suitable for multiple types of opening and closing quantities and control method |
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