CN205281783U - A signal transmission circuit that is used for oil gas concentration intelligence alarm - Google Patents
A signal transmission circuit that is used for oil gas concentration intelligence alarm Download PDFInfo
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- CN205281783U CN205281783U CN201620025063.7U CN201620025063U CN205281783U CN 205281783 U CN205281783 U CN 205281783U CN 201620025063 U CN201620025063 U CN 201620025063U CN 205281783 U CN205281783 U CN 205281783U
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Abstract
The utility model discloses a signal transmission circuit that is used for oil gas concentration intelligence alarm, including amplifier circuit and converting circuit, amplifier circuit is used for receiving oil gas consistency transmitter signal and enlargies the processing with it, converting circuit be used for receiving hang oneself amplifier circuit after amplifying the signal and change and linear transmission its frequency. Above -mentioned a signal transmission circuit that is used for oil gas concentration intelligence alarm simple structure, the cost is lower and the precision is higher.
Description
Technical field
The utility model relates to a kind of Signal transmissions circuit, in particular to a kind of Signal transmissions circuit for gas concentration intelligent alarm instrument.
Background technology
Digitizing gas concentration intelligent alarm instrument is mainly used in the place being mainly used in oil, dangerous gas is produced, transported, stores, and such as places such as all kinds of oil depot, service stations, and is used in the places such as whole district's oil depot, service station. It is the replacement product of traditional gas concentration alarm, has commercial value and application prospect widely, and therefore research for digitizing gas concentration alarm has very real meaning. But, when realizing digitizing gas concentration and report to the police, it is necessary to gas concentration sensor signal is transmitted. The existing circuit for transmitting gas concentration sensor signal is comparatively complicated, and cost is higher, and the situation of signal skew very likely occurs during transmission.
Practical novel content
For above-mentioned the deficiencies in the prior art, technical problem to be solved in the utility model is: provide the Signal transmissions circuit that a kind of structure is simple, cost is lower and precision is higher.
A kind of Signal transmissions circuit for gas concentration intelligent alarm instrument provided by the utility model, comprise and amplify circuit and conversion circuit, described amplification circuit for receiving gas concentration sensor signal and is carried out amplification process, described conversion circuit for receive hang oneself amplify circuit amplify after signal and its frequency is changed and linear transfer, described amplification circuit comprises amplifier A1, sign reversing amplifier A2, differential amplifier A 3, and the inverting input of described amplifier A1 receives gas concentration sensor signal V1, in-phase input end ground connection, the output terminal of described amplifier A1 is directly connected with the inverting input of sign reversing amplifier A2 by resistance R3, the in-phase input end ground connection of described sign reversing amplifier A2, the inverting input of described sign reversing amplifier A2 is also directly connected with its output terminal by resistance R4, the output terminal of described sign reversing amplifier A2 is also directly connected with the in-phase input end of differential amplifier A 3 by resistance R6, the in-phase input end of described differential amplifier A 3 is also directly by resistance R8 ground connection, the inverting input of described differential amplifier A 3 is connected to the inverting input of amplifier A1 successively by resistance R5 and resistance R2, the inverting input of described differential amplifier A 3 is also directly connected with its output terminal by resistance R7, the output terminal of described differential amplifier A 3 also directly exports the signal V0 after amplifying by resistance R9, described conversion circuit comprises the first voltage-frequency pressure conversion unit and the 2nd voltage-frequency pressure conversion frequently frequently unit, optocoupler, described signal V0 after amplifying is connected with the described first voltage-frequency unit of pressure conversion frequently by resistance R10 and electric capacity C2 successively, node between described resistance R10 and electric capacity C2 is directly connected with the described first voltage-frequency unit of pressure conversion frequently, and the described first voltage-frequency unit of pressure conversion frequently is connected with the described 2nd voltage-frequency unit of pressure conversion frequently by optocoupler and resistance R12.
Wherein, the described first voltage-frequency unit of pressure conversion frequently comprises input amplifier A4, comparer A5, first monostable circuit and the first triode, described signal V0 after amplifying is connected with the output terminal of input amplifier A4 and the inverting input of comparer A5 by resistance R10 and electric capacity C2 successively, node between described resistance R10 and electric capacity C2 is connected with the inverting input of input amplifier A4, the in-phase input end ground connection of described input amplifier A4, the in-phase input end ground connection of described comparer A5, the input terminus of output terminal circuit monostable with first is connected, the ground terminal of described first monostable circuit is by electric capacity C1 ground connection, the described output terminal of the first monostable circuit is connected with the base stage of the first triode, the grounded emitter of described first triode, the described collector electrode of the first triode is connected with the negative electrode of the photodiode of optocoupler, the anode of the photodiode of described optocoupler is connected with power supply Vc1 by resistance R11, the grounded emitter of the triode of described optocoupler, collector electrode is connected with power supply Vc2 by resistance R12, the collector electrode of the triode of described optocoupler is also successively by electric capacity C5 and resistance R14 ground connection, node between described electric capacity C5 and resistance R14 is connected with power supply Vc2 by resistance R13.
Wherein, described 2nd voltage-frequency pressure conversion frequently unit comprises transmitting amplifier A6, comparer A7, the 2nd monostable circuit and the 2nd triode; The in-phase input end ground connection of described transmitting amplifier A6, inverting input is connected with its output terminal by electric capacity C4, resistance R15 and electric capacity C4 is connected in parallel, the in-phase input end ground connection of described comparer A7, the node that inverting input is connected between resistance R14 and electric capacity C5, output terminal is connected with the input terminus of the 2nd monostable circuit, and the ground terminal of described 2nd monostable circuit is by electric capacity C3 ground connection, output terminal is connected with the base stage of the 2nd triode, the grounded emitter of described 2nd triode.
Further, the described Signal transmissions circuit for gas concentration intelligent alarm instrument also comprises resistance R1, and the inverting input of described amplifier A1 receives gas concentration sensor signal V1 by resistance R1.
Gas concentration sensor signal V1 is first amplified by above-mentioned Signal transmissions circuit through amplifying circuit, and open at amplification process and eliminate common mode signal to the interference of long line, it is to increase immunity from interference. Signal V0 after amplification processes, through voltage to frequency convert, becomes pulse signal, and its frequency and V0 are linear, after this pulse signal is sent to receiving end by optocoupler, then through voltage to frequency conversion, becomes direct current signal V2. Like this, direct current signal V2 and the gas concentration sensor signal V1 before amplification processes also maintains linear transfer. The described Signal transmissions circuit structure for gas concentration intelligent alarm instrument is simple, cost is lower and precision is higher.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, it is briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the skeleton diagram of the utility model for the better embodiment of the Signal transmissions circuit of gas concentration intelligent alarm instrument.
Fig. 2 is the schematic circuit of the better embodiment amplifying circuit in Fig. 1.
Fig. 3 is the schematic circuit of the better embodiment changing circuit in Fig. 1.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that described embodiment is only the utility model part embodiment, instead of whole embodiments. Based on the embodiment in the utility model, those of ordinary skill in the art are not making other embodiments all obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Please refer to shown in Fig. 1, a kind of Signal transmissions circuit 1 for gas concentration intelligent alarm instrument of the utility model comprises amplification circuit 100 and conversion circuit 120. Described amplification circuit 100 for receiving gas concentration sensor signal and is carried out amplification process, described conversion circuit 120 for receive hang oneself amplify circuit 100 amplify after signal and its frequency is changed and linear transfer.
Shown in Fig. 2, described amplification circuit 100 comprises amplifier A1, sign reversing amplifier A2, differential amplifier A 3 and resistance R1-R9. The inverting input of described amplifier A1 receives gas concentration sensor signal V1 by resistance R1, in-phase input end ground connection. The output terminal of described amplifier A1 is directly connected with the inverting input of sign reversing amplifier A2 by resistance R3, the in-phase input end ground connection of described sign reversing amplifier A2. The inverting input of described sign reversing amplifier A2 is also directly connected with its output terminal by resistance R4.
The output terminal of described sign reversing amplifier A2 is also directly connected with the in-phase input end of differential amplifier A 3 by resistance R6, and the in-phase input end of described differential amplifier A 3 is also directly by resistance R8 ground connection. The inverting input of described differential amplifier A 3 is connected to the inverting input of amplifier A1 successively by resistance R5 and resistance R2. The inverting input of described differential amplifier A 3 is also directly connected with its output terminal by resistance R7, and the output terminal of described differential amplifier A 3 also directly exports the signal V0 after amplifying by resistance R9.
Shown in Fig. 3, described conversion circuit 120 comprise voltage-frequency frequently pressure conversion unit 10,12, optocoupler OC, resistance R10-R15, electric capacity C1-C5. The described voltage-frequency unit 10 of pressure conversion frequently comprises input amplifier A4, comparer A5, monostable circuit 13, triode Q1, and the described voltage-frequency unit 12 of pressure conversion frequently comprises transmitting amplifier A6, comparer A7, monostable circuit 16 and triode Q2.
Described signal V0 after amplifying is connected with the described voltage-frequency unit 10 of pressure conversion frequently by resistance R10 and electric capacity C2 successively, and the node between described resistance R10 and electric capacity C2 is directly connected with the described voltage-frequency unit 10 of pressure conversion frequently. The described voltage-frequency unit of pressure conversion frequently 10 is connected with the described voltage-frequency unit 12 of pressure conversion frequently by optocoupler OC and resistance R12.
Concrete, described signal V0 after amplifying is connected with the output terminal of input amplifier A4 and the inverting input of comparer A5 by resistance R10 and electric capacity C2 successively. Node between described resistance R10 and electric capacity C2 is connected with the inverting input of input amplifier A4, the in-phase input end ground connection of described input amplifier A4. The in-phase input end ground connection of described comparer A5, output terminal is connected with the input terminus of monostable circuit 13,2nd end of described monostable circuit 13 is by electric capacity C1 ground connection, and the described output terminal of monostable circuit 13 is connected with the base stage of triode Q1, the grounded emitter of described triode Q1.
The collector electrode of described triode Q1 is connected with the negative electrode of the photodiode of optocoupler OC, and the anode of the photodiode of described optocoupler OC is connected with power supply Vc1 by resistance R11. The grounded emitter of the triode of described optocoupler OC, collector electrode is connected with power supply Vc2 by resistance R12, and the collector electrode of the triode of described optocoupler OC is also successively by electric capacity C5 and resistance R14 ground connection. Node between described electric capacity C5 and resistance R14 is connected with power supply Vc2 by resistance R13.
The in-phase input end ground connection of described transmitting amplifier A6, inverting input is connected with its output terminal by electric capacity C4, and described resistance R15 and electric capacity C4 is connected in parallel. The in-phase input end ground connection of described comparer A7, the node that inverting input is connected between resistance R14 and electric capacity C5, output terminal is connected with the first end of monostable circuit 16, the ground terminal of described monostable circuit 16 is by electric capacity C3 ground connection, 3rd end is connected with the base stage of triode Q2, the grounded emitter of described triode Q2, collector electrode is connected with rear portion circuit.
Simply describe the principle of work of foregoing circuit is carried out below:
Described gas concentration sensor signal V1 first amplifies through amplifier A1, obtains signal V01, and described sign reversing amplifier A2 makes signal V01 paraphase, and like this, signal V01 is exactly one pair of size poor mould signal equal, opposite polarity with signal V02. Difference mould signal is received by above-mentioned one by differential amplifier A 3, meanwhile, in the utility model, resistance R7, R8 and resistance R5, R6 strictly match, and the resistance of resistance R7 and R8 is equal, the resistance of resistance R5 and R6 is equal, such output voltage V0=(R7/R5) (V02-V01). That is, it is only exaggerated the difference of V02 and V01, eliminate common mode signal to the interference of long line, it is to increase immunity from interference.
Signal V0 after amplification processes, through voltage to frequency convert, becomes pulse signal, and its frequency and V0 are linear, after this pulse signal is sent to receiving end by optocoupler, then through voltage to frequency conversion, becomes direct current signal V2. Like this, direct current signal V2 and the gas concentration sensor signal V1 before amplification processes also maintains linear transfer.
These are only enforcement mode of the present utility model; not thereby patent scope of the present utility model is limited; every utilize the utility model specification sheets and accompanying drawing content to do equivalent structure or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical fields, all it is included in scope of patent protection of the present utility model with reason.
Claims (4)
1. the Signal transmissions circuit for gas concentration intelligent alarm instrument, it is characterized in that: described Signal transmissions circuit comprises amplification circuit and conversion circuit, described amplification circuit for receiving gas concentration sensor signal and is carried out amplification process, described conversion circuit for receive hang oneself amplify circuit amplify after signal and its frequency is changed and linear transfer, described amplification circuit comprises amplifier A1, sign reversing amplifier A2, differential amplifier A 3, and the inverting input of described amplifier A1 receives gas concentration sensor signal V1, in-phase input end ground connection, the output terminal of described amplifier A1 is directly connected with the inverting input of sign reversing amplifier A2 by resistance R3, the in-phase input end ground connection of described sign reversing amplifier A2, the inverting input of described sign reversing amplifier A2 is also directly connected with its output terminal by resistance R4, the output terminal of described sign reversing amplifier A2 is also directly connected with the in-phase input end of differential amplifier A 3 by resistance R6, the in-phase input end of described differential amplifier A 3 is also directly by resistance R8 ground connection, the inverting input of described differential amplifier A 3 is connected to the inverting input of amplifier A1 successively by resistance R5 and resistance R2, the inverting input of described differential amplifier A 3 is also directly connected with its output terminal by resistance R7, the output terminal of described differential amplifier A 3 also directly exports the signal V0 after amplifying by resistance R9, described conversion circuit comprises the first voltage-frequency pressure conversion unit and the 2nd voltage-frequency pressure conversion frequently frequently unit, optocoupler, described signal V0 after amplifying is connected with the first voltage-frequency unit of pressure conversion frequently by resistance R10 and electric capacity C2 successively, node between described resistance R10 and electric capacity C2 is directly connected with the described first voltage-frequency unit of pressure conversion frequently, and the described first voltage-frequency unit of pressure conversion frequently is connected with the 2nd voltage-frequency unit of pressure conversion frequently by optocoupler and resistance R12.
2. as claimed in claim 1 for the Signal transmissions circuit of gas concentration intelligent alarm instrument, it is characterized in that: the described first voltage-frequency unit of pressure conversion frequently comprises input amplifier A4, comparer A5, first monostable circuit and the first triode, signal V0 after amplifying is connected with the output terminal of input amplifier A4 and the inverting input of comparer A5 by resistance R10 and electric capacity C2 successively, node between described resistance R10 and electric capacity C2 is connected with the inverting input of input amplifier A4, the in-phase input end ground connection of described input amplifier A4, the in-phase input end ground connection of described comparer A5, the input terminus of output terminal circuit monostable with first is connected, the ground terminal of described first monostable circuit is by electric capacity C1 ground connection, the described output terminal of the first monostable circuit is connected with the base stage of the first triode, the grounded emitter of described first triode, the described collector electrode of the first triode is connected with the negative electrode of the photodiode of optocoupler, the anode of the photodiode of described optocoupler is connected with power supply Vc1 by resistance R11, the grounded emitter of the triode of described optocoupler, collector electrode is connected with power supply Vc2 by resistance R12, the collector electrode of the triode of described optocoupler is also successively by electric capacity C5 and resistance R14 ground connection, node between described electric capacity C5 and resistance R14 is connected with power supply Vc2 by resistance R13.
3. as claimed in claim 2 for the Signal transmissions circuit of gas concentration intelligent alarm instrument, it is characterised in that: the described 2nd voltage-frequency unit of pressure conversion frequently comprises transmitting amplifier A6, comparer A7, the 2nd monostable circuit and the 2nd triode; The in-phase input end ground connection of described transmitting amplifier A6, inverting input is connected with its output terminal by electric capacity C4, resistance R15 and electric capacity C4 is connected in parallel, the in-phase input end ground connection of described comparer A7, the node that inverting input is connected between resistance R14 and electric capacity C5, output terminal is connected with the input terminus of the 2nd monostable circuit, and the ground terminal of described 2nd monostable circuit is by electric capacity C3 ground connection, output terminal is connected with the base stage of the 2nd triode, the grounded emitter of described 2nd triode.
4. as claimed in claim 1 for the Signal transmissions circuit of gas concentration intelligent alarm instrument, it is characterised in that: also comprising resistance R1, the inverting input of described amplifier A1 receives gas concentration sensor signal V1 by resistance R1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620025063.7U CN205281783U (en) | 2016-01-12 | 2016-01-12 | A signal transmission circuit that is used for oil gas concentration intelligence alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620025063.7U CN205281783U (en) | 2016-01-12 | 2016-01-12 | A signal transmission circuit that is used for oil gas concentration intelligence alarm |
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| Publication Number | Publication Date |
|---|---|
| CN205281783U true CN205281783U (en) | 2016-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620025063.7U Expired - Fee Related CN205281783U (en) | 2016-01-12 | 2016-01-12 | A signal transmission circuit that is used for oil gas concentration intelligence alarm |
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| CN (1) | CN205281783U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109626310A (en) * | 2018-11-23 | 2019-04-16 | 石化盈科信息技术有限责任公司 | Fuel charger |
-
2016
- 2016-01-12 CN CN201620025063.7U patent/CN205281783U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109626310A (en) * | 2018-11-23 | 2019-04-16 | 石化盈科信息技术有限责任公司 | Fuel charger |
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Legal Events
| Date | Code | Title | Description |
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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: 20160601 Termination date: 20190112 |