CN202798501U - Voltage transducer circuit of online monitoring device of switch cabinet - Google Patents
Voltage transducer circuit of online monitoring device of switch cabinet Download PDFInfo
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- CN202798501U CN202798501U CN 201220389301 CN201220389301U CN202798501U CN 202798501 U CN202798501 U CN 202798501U CN 201220389301 CN201220389301 CN 201220389301 CN 201220389301 U CN201220389301 U CN 201220389301U CN 202798501 U CN202798501 U CN 202798501U
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Abstract
The utility model provides a voltage transducer circuit of an online monitoring device of a switch cabinet. The voltage transducer circuit comprises an amplifying circuit, wherein a detection signal Vs on the input end of the amplifying circuit is an alternating current voltage detection signal, and the detection signal Vs is input into a converting circuit to be converted into a direct current signal corresponding to the amplitude of the detection signal Vs after orderly passing the amplifying circuit, a rectifying circuit, a filter follower circuit and a zeroing circuit. The voltage transducer circuit of the online monitoring device of the switch cabinet provided by the utility model carries out amplifying, filtering and zeroing on the alternating current voltage detection signal, and then converts the detection signal into 4-20mA of direct current standard signal through the converting circuit.
Description
Technical field
The utility model relates to transmission circuit, specifically, relates in particular to a kind of for switch cubicle on-Line Monitor Device voltage transmission circuit.
Background technology
In the on-Line Monitor Device of switch cubicle, the signal that usually transducer need to be detected is transferred to the subsequent treatment module, if directly the detection signal with transducer transmits, therefore probably distortion or be subject to electromagnetic interference in transmission course of detection signal need to convert detection signal to the standard signal that is suitable for transmitting.
The utility model content
The purpose of this utility model is for the problems referred to above, and a kind of voltage transmission circuit for the switch cubicle on-Line Monitor Device is provided, and the ac voltage signal that detects is converted to change direct current 4-20mA standard signal into, reduces electromagnetic interference to the impact of detection signal.
For achieving the above object, the utility model has adopted following technical proposal: a kind of voltage transmission circuit for the switch cubicle on-Line Monitor Device is provided, comprise amplifying circuit, detection signal Vs on the described input amplifier is the alternating voltage detection signal, wherein, described detection signal Vs after amplifying circuit, rectification circuit, filtering follow circuit and zeroing circuit, is input to the translation circuit internal conversion and becomes the dc current signal corresponding with described detection signal Vs amplitude successively.
The voltage transmission circuit that is used for the switch cubicle on-Line Monitor Device of the above, wherein, state rectification circuit and comprise amplifier U1 and U2, the positive input of described amplifier U1 is connected to public terminal GND through resistance R 14, the negative input of described amplifier U1 connects the output of amplifying circuit after resistance R 10, the output of described amplifier U1 connects public terminal GND through diode D2, resistance R 18, and the negative input of diode cathode and amplifier U1 difference contact resistance R9; The positive input of described amplifier U2 connects the output of amplifying circuit, and the output of described amplifier U2 is connected to an end of resistance R 18 through the negative electrode of diode D1, and is connected by wire between the negative electrode of amplifier U1 negative input and diode D1.
The voltage transmission circuit that is used for the switch cubicle on-Line Monitor Device of the above, wherein, described translation circuit comprises amplifier U5, U6 and transistor Q1 and Q2, the positive input of described amplifier U5 connects the output of zeroing circuit, the negative input of described amplifier U5 connects public terminal GND through resistance R 7, the output of described amplifier U5 connects the grid of transistor Q1, the source electrode of described transistor Q1 connects the negative input of amplifier U5, and the drain electrode of described transistor Q1 is connected power Vcc through resistance R 21, diode D3 with D4; The positive input of described amplifier U6 connects the drain electrode of transistor Q1, the negative input of described amplifier U6 connects the drain electrode of transistor Q1 through the negative electrode of resistance R 22 connection diode D4, the output of described amplifier U6 connects the grid of transistor Q2, the source electrode of described transistor Q2, the drain electrode of this body pipe Q2 is output Iout.
Compared with prior art, the utility model has the advantage of: the voltage transmission circuit that is used for the switch cubicle on-Line Monitor Device that the utility model provides, with the alternating voltage detection signal amplify, after filtering, zeroing processes, convert 4-20mA direct current standard signal to by translation circuit again, reduce electromagnetic interference to the impact of detection signal.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the electrical block diagram of a kind of voltage transmission circuit for the switch cubicle on-Line Monitor Device of the utility model.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 1, a kind of voltage transmission circuit for the switch cubicle on-Line Monitor Device is provided, comprise amplifying circuit 1, detection signal Vs on described amplifying circuit 1 input is the alternating voltage detection signal, wherein, described detection signal Vs after amplifying circuit 1, rectification circuit 2, filtering follow circuit 3 and zeroing circuit 4, is input to translation circuit 5 internal conversions and becomes the dc current signal corresponding with described detection signal Vs amplitude successively.Wherein, state rectification circuit 2 and comprise amplifier U1 and U2, the positive input of described amplifier U1 is connected to public terminal GND through resistance R 14, the negative input of described amplifier U1 connects the output of amplifying circuit after resistance R 10, the output of described amplifier U1 connects public terminal GND through diode D2, resistance R 18, and the negative input of diode cathode and amplifier U1 difference contact resistance R9; The positive input of described amplifier U2 connects the output of amplifying circuit, the output of described amplifier U2 is connected to an end of resistance R 18 through the negative electrode of diode D1, and be connected by wire between the negative electrode of amplifier U1 negative input and diode D1, so the output of rectification circuit is to obtain dc level signal on the resistance R 18.Wherein, described translation circuit 5 comprises amplifier U5, U6 and transistor Q1 and Q2, the positive input of described amplifier U5 connects the output of zeroing circuit, the negative input of described amplifier U5 connects public terminal GND through resistance R 7, the output of described amplifier U5 connects the grid of transistor Q1, the source electrode of described transistor Q1 connects the negative input of amplifier U5, and the drain electrode of described transistor Q1 is connected power Vcc through resistance R 21, diode D3 with D4; The positive input of described amplifier U6 connects the drain electrode of transistor Q1, the negative input of described amplifier U6 connects the drain electrode of transistor Q1 through the negative electrode of resistance R 22 connection diode D4, the output of described amplifier U6 connects the grid of transistor Q2, the source electrode of described transistor Q2, the drain electrode of this body pipe Q2 is output Iout, so the output current signal of output Iout is controlled by the input signal of amplifier U5 positive input, thus the output Iout output direct current 4-20mA standard signal corresponding with detection signal Vs amplitude.
The voltage transmission circuit that is used for the switch cubicle on-Line Monitor Device that the utility model provides, with the alternating voltage detection signal amplify, after filtering, zeroing processes, convert 4-20mA direct current standard signal to by translation circuit 5 again, reduce electromagnetic interference to the impact of detection signal.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.
Claims (3)
1. voltage transmission circuit that is used for the switch cubicle on-Line Monitor Device, comprise amplifying circuit, detection signal Vs on the described input amplifier is the alternating voltage detection signal, it is characterized in that: described detection signal Vs after amplifying circuit, rectification circuit, filtering follow circuit and zeroing circuit, is input to the translation circuit internal conversion and becomes the dc current signal corresponding with described detection signal Vs amplitude successively.
2. the voltage transmission circuit that is used for the switch cubicle on-Line Monitor Device described in according to claim 1, it is characterized in that: described rectification circuit comprises amplifier U1 and U2, the positive input of described amplifier U1 is connected to public terminal GND through resistance R 14, the negative input of described amplifier U1 connects the output of amplifying circuit after resistance R 10, the output of described amplifier U1 connects public terminal GND through diode D2, resistance R 18, and the negative input of diode cathode and amplifier U1 difference contact resistance R9; The positive input of described amplifier U2 connects the output of amplifying circuit, and the output of described amplifier U2 is connected to an end of resistance R 18 through the negative electrode of diode D1, and is connected by wire between the negative electrode of amplifier U1 negative input and diode D1.
3. the voltage transmission circuit that is used for the switch cubicle on-Line Monitor Device described in according to claim 2, it is characterized in that: described translation circuit comprises amplifier U5, U6 and transistor Q1 and Q2, the positive input of described amplifier U5 connects the output of zeroing circuit, the negative input of described amplifier U5 connects public terminal GND through resistance R 7, the output of described amplifier U5 connects the grid of transistor Q1, the source electrode of described transistor Q1 connects the negative input of amplifier U5, and the drain electrode of described transistor Q1 is connected power Vcc through resistance R 21, diode D3 with D4; The positive input of described amplifier U6 connects the drain electrode of transistor Q1, the negative input of described amplifier U6 connects the drain electrode of transistor Q1 through the negative electrode of resistance R 22 connection diode D4, the output of described amplifier U6 connects the grid of transistor Q2, the source electrode of described transistor Q2, the drain electrode of this body pipe Q2 is output Iout.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220389301 CN202798501U (en) | 2012-08-07 | 2012-08-07 | Voltage transducer circuit of online monitoring device of switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220389301 CN202798501U (en) | 2012-08-07 | 2012-08-07 | Voltage transducer circuit of online monitoring device of switch cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202798501U true CN202798501U (en) | 2013-03-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220389301 Expired - Fee Related CN202798501U (en) | 2012-08-07 | 2012-08-07 | Voltage transducer circuit of online monitoring device of switch cabinet |
Country Status (1)
| Country | Link |
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| CN (1) | CN202798501U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103760409A (en) * | 2013-11-29 | 2014-04-30 | 宁波南车时代传感技术有限公司 | Voltage transducer |
| CN105758463A (en) * | 2016-04-15 | 2016-07-13 | 山西科为感控技术有限公司 | Continuous welded rail track temperature stress detecting system |
| CN106771821A (en) * | 2017-01-11 | 2017-05-31 | 长沙群瑞电子科技有限公司 | A kind of leakage current of an arrester turns 4 20mA signaling conversion circuits |
-
2012
- 2012-08-07 CN CN 201220389301 patent/CN202798501U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103760409A (en) * | 2013-11-29 | 2014-04-30 | 宁波南车时代传感技术有限公司 | Voltage transducer |
| CN103760409B (en) * | 2013-11-29 | 2016-08-24 | 宁波中车时代传感技术有限公司 | A kind of voltage transmitter |
| CN105758463A (en) * | 2016-04-15 | 2016-07-13 | 山西科为感控技术有限公司 | Continuous welded rail track temperature stress detecting system |
| CN105758463B (en) * | 2016-04-15 | 2018-11-20 | 山西科为感控技术有限公司 | Welded rail temperature stress mornitoring system |
| CN106771821A (en) * | 2017-01-11 | 2017-05-31 | 长沙群瑞电子科技有限公司 | A kind of leakage current of an arrester turns 4 20mA signaling conversion circuits |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20170807 |
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| CF01 | Termination of patent right due to non-payment of annual fee |