CN2466666Y - Module of mv-class voltage sensor for isolative measuring mv voltage - Google Patents
Module of mv-class voltage sensor for isolative measuring mv voltage Download PDFInfo
- Publication number
- CN2466666Y CN2466666Y CN 01204506 CN01204506U CN2466666Y CN 2466666 Y CN2466666 Y CN 2466666Y CN 01204506 CN01204506 CN 01204506 CN 01204506 U CN01204506 U CN 01204506U CN 2466666 Y CN2466666 Y CN 2466666Y
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- CN
- China
- Prior art keywords
- voltage
- direct current
- amplifier
- voltage sensor
- sensor assembly
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model relates to a mv-class voltage sensor module for measuring mv-class voltage in a contactless way and directly introducing a measured signal to a computer, which comprises a cluster of a primary side input circuit connected with a primary side resistor and a standard shunt, wherein the primary side resistor is sheathed with an electromagnetic coil, and the electromagnetic coil is connected with a magnetic oscillation circuit. The magnetic oscillation circuit is connected with an amplifier, and the output terminal of the amplifier is connected with a computer. The mv-class voltage sensor module can measure voltage without contact and has the advantages of low price, small size, light weight and convenient installation.
Description
The utility model relates to a kind of electronic monitoring device, particularly a kind of energy non-cpntact measurement voltage and the direct voltage sensor module of measuring-signal being introduced computing machine.
In the big power-equipment of the electric system of China and worker, ore deposit enterprise, the monitoring of high-amperage (several kiloamperes are to the training of several Wan An) signal, comprise the in the past standard shunts that adopt of monitoring of D.C. high-current and AC great current, output 75mv voltage standard signal is monitored with voltage table more.Because computer application, said system need be carried out the system controlled by computer transformation, and above-mentioned signal can not directly be imported computing machine by the voltage table monitoring, must be by conversion.At present Hall current sensor modules that adopt more, but the Hall great current sensor is relatively more expensive, price is from several ten thousand yuan to tens0000 yuans, and volume is big, trouble is installed, requires primary current bus broken string during installation, in practical operation, the user does not allow and changes former limit, do not allow powers failure, make installation bother more, time-consuming, require great effort.
The purpose of this utility model is the deficiency that overcomes above-mentioned measuring method, designs a kind of voltage sensor module of non-cpntact measurement voltage, and low price, volume are little, in light weight, easy for installation.
The purpose of this utility model is achieved in that it comprises a wiring board, be welded with sensor circuit on the described wiring board, described wiring board is provided with shell, described sensor circuit comprise be serially connected with former limit electricity sun with standard shunt and the former limit input circuit that connects, be with magnetic induction coil on the resistance of described former limit, described magnetic induction coil magnetic oscillation loop joins, and described magnetic oscillation is connected with a direct current amplifier in the loop, and the output terminal of described direct current amplifier links to each other with computing machine.
Described magnetic oscillation loop is wound on the circuit that the output terminal of operational amplifier on the magnetic induction coil and described operational amplifier links to each other with AC amplifier by its reverse input end and forms.
The positive input of described direct current amplifier links to each other with the output terminal of described operational amplifier.
The secondary feedback resistance of described direct current amplifier is an adjustable resistance.
The positive input of described direct current amplifier also is connected with a potentiometer.
Be filled with silica gel between described shell and the wiring board.
When the utility model is attempted by on the standard shunt of high-current equipment, standard shunt is exported 75 millivolts voltage usually, promptly produce onesize DC voltage at resistance two ends, former limit, when former limit of the present utility model resistance is 7.5 Europe, former limit resistance produces the electric current of 0 to 10 person of outstanding talent's peace, when this electric current passes the magnetic core of magnetic induction coil, the waveform in magnetic oscillation loop deflects away from " just " and " bears " symmetric points, the positive saturation current of magnetic core is greater than negative saturation current, DC component will be amplified by direct current amplifier and be exported, the output voltage size is directly proportional with the direct current size that magnetic core passes, the output terminal of direct current amplifier links to each other with microcomputer, do not need primary current bus broken string like this with high-current equipment, only need the utility model is attempted by the big current signal that just can monitor high-current equipment on the standard shunt easily on computers, so the utility model is a kind of voltage sensor module that can non-cpntact measurement voltage, non-cpntact measurement voltage has safe and reliable, no skewer is gone into loss, easy for installation, need not safeguard, for a long time on-line monitoring, advantages such as the life-span is long; Because the utility model circuit is simple, components and parts are few and do not have specific components, so the utility model volume is little, in light weight, low price, and ratio of performance to price height; Adopt the magnetic modulation principle to monitor, also have the fireballing advantage of system response, direct current amplifier output analog quantity is convenient to link to each other with computer interface.That above-mentioned shell and wiring board adopt is fire-retardant, high temperature, high-strength insulating material are made.
Below in conjunction with drawings and Examples the utility model is described further.
Fig. 1 is the connection diagram that the utility model is attempted by the standard shunt two ends.
Fig. 2 is an electrical block diagram of the present utility model.
The two ends of standard shunt 1 and connect the utility model 2 among Fig. 1, the output terminal of the utility model 2 links to each other with computing machine, and the A/D change-over circuit by computing machine is presented at signal on the computer display 3.
Among Fig. 2 the utility model and standard shunt 1 and connect the back with former limit resistance R form former limit input circuit, be with magnetic induction coil T on the resistance R of former limit, magnetic induction coil T and operational amplifier K1, AC amplifier K2 form the magnetic oscillation loop, and the output terminals A of operational amplifier K1 links to each other with the positive input of direct current amplifier K3.The secondary feedback resistance R of direct current amplifier K3
GFor the positive input B of adjustable resistance direct current amplifier K3 also is connected with a potentiometer W.
75 millivolts of standard signals of standard shunt 1 output, when shunt 1 and when connecting the utility model, 75 millivolts of voltage is that this electric current of electric current that limit, resistance two ends, the former limit resistance in 7.5 Europe produces 0 to 10 person of outstanding talent's peace is when passing the magnetic core of magnetic induction coil T in the sun value, the waveform in magnetic oscillation loop deflects away from " just " and " bears " symmetric points, the positive saturation current of magnetic core is greater than negative saturation current, DC component will be exported by direct current amplifier K3 amplification, the output voltage size is directly proportional with the DC current size that magnetic core passes, the output terminal of direct current amplifier links to each other with microcomputer, do not need primary current bus broken string like this, only need the utility model is attempted by the big current signal that just can monitor high-current equipment on the standard shunt easily on computers high-current equipment; When former limit circuit did not have the signal input, output terminals A was the direct current zero potential, and the potentiometer W that the positive input B of adjustment direct current amplifier K3 is ordered makes and is output as zero, when electric current passes through, adjusts secondary feedback resistance R
GOutput voltage is met the demands, promptly former limit 0-10mA, output 0-5V.Measurement range of the present utility model is 0-75mv, and the other technologies index is: offset voltage is≤20mv (former limit is 0 o'clock); Insulation voltage: 30KV, 50Hz, 1 minute; Precision≤1%; Linear error≤0.2%; Operating voltage: ± 15V; Working temperature: 0-70 degree centigrade; Storage temperature :-25 degrees centigrade to 85 degrees centigrade; Power consumption: 20mA.
Measurement range of the present utility model can be by user's requirement setting, and resistance and other parameters by adjusting former limit resistance can realize the measurement of different range voltage.
Claims (6)
1. the mv step voltage sensor assembly of an isolation measurement mv voltage, it comprises a wiring board, be welded with sensor circuit on the described wiring board, described wiring board is provided with shell, it is characterized in that described sensor circuit comprise be serially connected with former limit resistance with standard shunt and the former limit input circuit that connects, be with magnetic induction coil on the resistance of described former limit, described magnetic induction coil links to each other with the magnetic oscillation loop, described magnetic oscillation is connected with a direct current amplifier in the loop, and the output terminal of described direct current amplifier links to each other with computing machine.
2. the mv step voltage sensor assembly of isolation measurement mv voltage according to claim 1 is characterized in that described magnetic oscillation loop is wound on the circuit that the output terminal of operational amplifier on the magnetic induction coil and described operational amplifier links to each other with AC amplifier by reverse input end and forms.
3. the mv step voltage sensor assembly of isolation measurement mv voltage according to claim 1 and 2 is characterized in that the positive input of described direct current amplifier links to each other with the output terminal of described operational amplifier.
4. the mv step voltage sensor assembly of isolation measurement mv voltage according to claim 1, the secondary feedback resistance that it is characterized in that described direct current amplifier is an adjustable resistance.
5. the mv step voltage sensor assembly of isolation measurement mv voltage according to claim 1 is characterized in that the positive input of described direct current amplifier also is connected with a potentiometer.
6. the mv step voltage sensor assembly of isolation measurement mv voltage according to claim 1 is characterized in that being filled with silica gel between described shell and the wiring board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01204506 CN2466666Y (en) | 2001-02-27 | 2001-02-27 | Module of mv-class voltage sensor for isolative measuring mv voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01204506 CN2466666Y (en) | 2001-02-27 | 2001-02-27 | Module of mv-class voltage sensor for isolative measuring mv voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2466666Y true CN2466666Y (en) | 2001-12-19 |
Family
ID=33625719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01204506 Expired - Fee Related CN2466666Y (en) | 2001-02-27 | 2001-02-27 | Module of mv-class voltage sensor for isolative measuring mv voltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2466666Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103000361A (en) * | 2012-11-22 | 2013-03-27 | 南京江北自动化技术有限公司 | Current transformer |
-
2001
- 2001-02-27 CN CN 01204506 patent/CN2466666Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103000361A (en) * | 2012-11-22 | 2013-03-27 | 南京江北自动化技术有限公司 | Current transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |