CN202757982U - Current signal detector - Google Patents
Current signal detector Download PDFInfo
- Publication number
- CN202757982U CN202757982U CN 201220198856 CN201220198856U CN202757982U CN 202757982 U CN202757982 U CN 202757982U CN 201220198856 CN201220198856 CN 201220198856 CN 201220198856 U CN201220198856 U CN 201220198856U CN 202757982 U CN202757982 U CN 202757982U
- Authority
- CN
- China
- Prior art keywords
- circuit
- current
- detecting device
- output
- signal
- Prior art date
- 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
Links
- 238000001514 detection method Methods 0.000 claims abstract description 23
- 239000003990 capacitor Substances 0.000 claims description 8
- 239000003381 stabilizer Substances 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000007689 inspection Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004886 process control Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 208000033999 Device damage Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000009514 concussion Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Landscapes
- Fire Alarms (AREA)
Abstract
The utility model relates to a current signal detector which includes a signal input circuit, a signal detection scope circuit, a signal detection circuit, an alarm time circuit and an output circuit. The current enters into the current signal detector via the signal input circuit, and then enters into the alarm time circuit via the signal detection scope circuit and the signal detection circuit, and finally is output by the output circuit. The current signal detector is suitable for the direct current and alternating current multi-polarized wide voltage power supply, the detection current scope is adjustable, the detection current alarm time scope is adjustable, the application scope is wider, and the defects of a conventional current signal detector are overcome.
Description
Technical field
The utility model relates to the detection protective device of topworks in a kind of generating plant Process Control System, particularly relates to a kind of current signal detecting device.
Background technology
Topworks is the visual plant in power plant's Process Control System; to ensureing unit safety; stable operation has a very important role; given signal is undesired in topworks; when fault that some may cause serious consequence occurs; the current signal detecting device can in time take to carry out three disconnected protection output and the outputs of reporting to the police; thereby softening fault; protect the position to be repaired; avoid occuring great device damage or human casualty accident; for the security and stability that improves topworks; take precautions against fault; detect as early as possible; find fault; prevention; softening; control and fix a breakdown; avoid fault further to enlarge significant, for last together pass is held in the safe operation of power plant's heat power equipment.But still there is following shortcoming in a large amount of actuator current signal detectors that use of power plant at present:
1, complicated structure;
2, the supply voltage of equipment is required stricter, can only carry out single voltage fed to it, namely can only DC power supply, perhaps can only use ac power supply;
3, the detection alarm of electric current value is single, scope can not be adjusted, time of fire alarming can not be adjusted, can't satisfy the technological requirement of on-the-spot operation, make a lot of topworkies because the scope of current signal does not meet the monitoring range of current signal detecting device, and cause the current signal detecting device to use, not only cause very large loss, and can affect real-time and the accuracy of detection.
4, not only range of application is less for existing current signal detecting device, and higher to operation and maintenance personnel's requirement, is unfavorable for daily servicing and maintenance.
This shows, above-mentioned existing current signal detecting device obviously still has inconvenience and defective, and demands urgently further being improved in structure and use.How to found a kind of applicable direct current and exchange the wide power voltage supply of multipolarity, detect the range of current capable of regulating, detect electric current time of fire alarming scope capable of regulating, the current signal detecting device of the new structure that range of application is wider is that the current industry utmost point needs improved target.
The utility model content
The technical problems to be solved in the utility model provides a kind of current signal detecting device, make its applicable direct current and exchange the wide power voltage supply of multipolarity, detect the range of current capable of regulating, detect electric current time of fire alarming scope capable of regulating, range of application is wider, thereby overcomes the deficiency of existing current signal detecting device.
For solving the problems of the technologies described above, a kind of current signal detecting device of the utility model, comprise signal input circuit, area detection signal circuit, signal deteching circuit, time of fire alarming circuit and output circuit, wherein: electric current enters the current signal detecting device through signal input circuit, through entering the time of fire alarming circuit behind area detection signal circuit and the signal deteching circuit, finally export by output circuit.
As a kind of improvement of the present utility model, described output circuit comprises active normally closed output, active normally closed output and passive normally-closed output circuit.
Also be connected with the switch input circuit between described area detection signal circuit and the signal deteching circuit.
Described output circuit also is connected with mu balanced circuit.
Described mu balanced circuit adopts the AMS1117 voltage stabilizer.
Described signal input circuit comprises rectification circuit and the fuse F2 of series connection, and wherein rectification circuit mainly is comprised of the capacitor C 1 of parallel connection and diode Z2 and Z3.
Also be serially connected with the carbon resister of 1W on the output circuit of described rectification circuit.
Described area detection signal circuit adopts LM358 high-gain dual mode amplifier, signal deteching circuit adopts the S8050 amplifier, the output terminal of S8050 amplifier also is connected to diode D5, D6, and the output terminal of LM358 amplifier links to each other with the S8050 amplifier by resistance R 31, R32 and variable resistor R23.
Described time of fire alarming main circuit will comprise capacitor C 11 and hf115f-005 relay.
After adopting such structure, the utlity model has following outstanding beneficial effect:
1, abandon the design of traditional discrete component, adopted up-to-date integrated antenna package design, simple in structure, integrated level is high, failure rate is lower;
2, special voltage stabilizing and rectification circuit design, make the current signal detecting device not only can adopt 24 volts of power voltage supplies of direct current but also can adopt the AC 220 V power supply, the allowable fluctuation range of voltage is ± 20%, greatly improved the usable range of current signal detecting device, for on-the-spot actual the use created convenience;
3, unique current detecting alarm range regulating circuit design, but make the detection alarm scope gamut adjustment of electric current, make topworks and can't not use the problem of current signal detecting device to be resolved because the scope of current signal does not meet the monitoring range of existing current signal detecting device, current signal detecting device of the present utility model can be adjusted according to the actual process parameter at scene, has greatly improved the dirigibility of using.
Description of drawings
Above-mentioned only is the general introduction of technical solutions of the utility model, and for can clearer understanding technological means of the present utility model, the utility model is described in further detail below in conjunction with accompanying drawing and embodiment.
Fig. 1 is the electric circuit constitute schematic diagram of the utility model current signal detecting device.
Fig. 2 is the circuit catenation principle figure of the utility model current signal detecting device.
Fig. 3 is the outside terminal schematic diagram of the utility model current signal detecting device.
Embodiment
See also shown in Figure 1, the utility model current signal detecting device, mainly comprise signal input circuit, area detection signal circuit, signal deteching circuit, time of fire alarming circuit and output circuit, wherein, electric current enters the current signal detecting device through signal input circuit, through entering the time of fire alarming circuit behind area detection signal circuit and the signal deteching circuit, finally export by output circuit.
Wherein, please cooperate and consult shown in Figure 2ly, signal input circuit mainly comprises rectification circuit and the fuse F2 of series connection, and rectification circuit mainly is comprised of the capacitor C 1 of parallel connection and diode Z2 and Z3.Bistable presses diode to have the advantages that pipe pressure demand is lower, response speed is fast, and through the precision rectifying of capacitor C 1 and silicon bridge Z2 and Z3, so that signal passband scope is larger, stationary singnal is more stable.In addition; when being arranged, the signal input has a concussion; a very high level value can occur first and slowly drop to again normal value; therefore; the utility model has also connect a resistance R 25 on the output circuit of rectification circuit, adopt the carbon resister of 1W, thereby the output clamper is arrived 5.7V; do not allow it continue to raise, protected follow-up circuit, reduced reflecting time.
The area detection signal circuit preferably adopts LM358 high-gain dual mode amplifier, and signal is by behind the LM358 amplifier, and it is high that signal has gain, and common-mode rejection ratio is high, common mode range is wide, compensation is simple, the characteristics such as temperature stability is good between the working stability, two amplifiers.
Signal deteching circuit adopts the S8050 amplifier, and amplifier is decayed high input voltage, makes signal reach amplifier acceptable level.Current sense amplifier is converted to electric current with the difference input voltage and is more convenient for using.The utility model adopts special-purpose high-end galvanometer circuit, signal is first by resistance R 32, R23, again by S8050 amplifier and diode D5, D6, comprised and finished all functions unit that high-side current detects, can under the common mode voltage of 24V, detect high-side current, and with it proportional, the output of the electric current take ground level as reference point is provided.Adopt employed inspection leakage resistance in the high-end inspection stream amplifier to be placed between the power input of high-end and detected circuit of power supply, the inspection leakage resistance is placed on high-end to earth loop increase extra impedance, and this technology has improved the performance of whole circuit and simplified the requirement of cloth version.
The utility model amplifies little difference input voltage in the following way: the output terminal of LM358 amplifier links to each other with the S8050 amplifier with R32 by R31, utilizes R23 can adjust the electric current that flows through D5 and D6, thereby detects different current signal input values; Usually, only have the difference input voltage to remain on 22V or 26 when above, the current detecting of this framework is just useful; But, the pull-up circuit of area detection signal inside can make the input of amplifier remain near the 48V power supply, therefore, and when the 48V of difference input voltage and device supply voltage is following, can realize accurate difference input voltage measurement, make area detection signal more extensive.
The time of fire alarming main circuit will comprise capacitor C 11 and hf115f-005 relay, when electric current charges to C11, voltage is raise, and makes the action of relay hf115f-005 adhesive alarm command; When electric current does not charge to C11, make lower voltage, make relay hf115f-005 disconnect alarm command and remove, recover original state.
At last, output circuit of the present utility model comprises active normally closed output, active normally closed output and passive normally-closed output circuit, by adjustable resistance RV9, the input of by-pass cock amount realizes active normally closed output, active normally closed output, passive normally-closed output by adjustable resistance RV5, RV7.
Better, output circuit also is connected with mu balanced circuit, this mu balanced circuit adopts the AMS1117 voltage stabilizer, as shown in Figure 2, alternating current 220V voltage is by inductance L 1, capacitor C 2, C15 and the voltage stabilizing of AMS1117 voltage stabilizer, and the AMS1117 voltage stabilizer is designed for provides 1A output current and operting differential pressure can be low to moderate 1V.When maximum output current, the pressure reduction of AMS1117 voltage stabilizer guarantees that maximum is no more than 1.3V, and reducing and reduce gradually with load current.The trimming of AMS1117 voltage stabilizer is adjusted to reference voltage in 1.5% the error, and current limit also obtained adjustment, to reduce the pressure that causes because of voltage stabilizer and power circuit overload as far as possible.
Please cooperate consult shown in Figure 3, during use, to the L of the terminal 1 of current signal detecting device, the power supply of N port (direct current with exchange all can), regulate electric current alarm range adjusting knob 7 according to on-the-spot actual process parameter and regulate adjustable resistor R41, make the current signal alarming value meet on-the-spot technological requirement.The I1 port of on-the-spot input signal anode connecting terminal 6 links to each other with F2, and the I2 port of negative terminal connecting terminal 6 links to each other with the GND zero potential.V11 and the V12 port of active warning output connecting terminal 2, the perhaps V21 of connecting terminal 3 and V22 port, A1 and the A2 port of passive warning output connecting terminal 4, thus be connected with output circuit.Switch input links to each other with R31, R32 by the P1 port of terminal 5, and the P2 port by terminal 5 links to each other with the GND zero potential.
The above; it only is preferred embodiment of the present utility model; be not that the utility model is done any pro forma restriction, those skilled in the art utilize the technology contents of above-mentioned announcement to make a little simple modification, equivalent variations or modification, all drop in the protection domain of the present utility model.
Claims (7)
1. a current signal detecting device is characterized in that comprising signal input circuit, area detection signal circuit, signal deteching circuit, time of fire alarming circuit and output circuit, wherein:
Electric current enters the current signal detecting device through signal input circuit, through entering the time of fire alarming circuit behind area detection signal circuit and the signal deteching circuit, finally exports by output circuit;
Described area detection signal circuit adopts LM358 high-gain dual mode amplifier, signal deteching circuit adopts the S8050 amplifier, the output terminal of S8050 amplifier also is connected to diode D5, D6, and the output terminal of LM358 amplifier links to each other with the S8050 amplifier by resistance R 31, R32 and variable resistor R23;
Described time of fire alarming main circuit will comprise capacitor C 11 and hf115f-005 relay.
2. current signal detecting device according to claim 1 is characterized in that described output circuit comprises active normally closed output, active normally closed output and passive normally-closed output circuit.
3. current signal detecting device according to claim 1 is characterized in that also being connected with the switch input circuit between described area detection signal circuit and the signal deteching circuit.
4. current signal detecting device according to claim 1 is characterized in that described output circuit also is connected with mu balanced circuit.
5. current signal detecting device according to claim 4 is characterized in that described mu balanced circuit adopts the AMS1117 voltage stabilizer.
6. current signal detecting device according to claim 1 is characterized in that described signal input circuit comprises rectification circuit and the fuse F2 of series connection, and wherein rectification circuit mainly is comprised of the capacitor C 1 of parallel connection and diode Z2 and Z3.
7. current signal detecting device according to claim 6 is characterized in that also being serially connected with on the output circuit of described rectification circuit the carbon resister of 1W.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220198856 CN202757982U (en) | 2012-05-04 | 2012-05-04 | Current signal detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220198856 CN202757982U (en) | 2012-05-04 | 2012-05-04 | Current signal detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202757982U true CN202757982U (en) | 2013-02-27 |
Family
ID=47737154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220198856 Expired - Fee Related CN202757982U (en) | 2012-05-04 | 2012-05-04 | Current signal detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202757982U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104076181A (en) * | 2013-03-28 | 2014-10-01 | 海洋王（东莞）照明科技有限公司 | Current detection circuit |
-
2012
- 2012-05-04 CN CN 201220198856 patent/CN202757982U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104076181A (en) * | 2013-03-28 | 2014-10-01 | 海洋王（东莞）照明科技有限公司 | Current detection circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103311884B (en) | A kind of Self-recover overvoltage-undervoltage protector with creepage protection function | |
| CN205017002U (en) | Current transformer protection device with long -range SMS alarming function | |
| CN201838982U (en) | Residual current protection device and circuit breaker using same | |
| CN106093494A (en) | A kind of signal for electronic mutual inductor protects filter circuit | |
| CN105610128A (en) | Intelligent motor control protector | |
| CN103852674A (en) | Residual current transformer secondary coil disconnection detection circuit | |
| CN109239437B (en) | Current sensor with self-checking redundancy function | |
| CN103199500B (en) | Series capacitor bank without dead zone protection method | |
| CN202757982U (en) | Current signal detector | |
| CN103956709A (en) | Plastic housing type residual current protector with remote residual current tripping warning function | |
| CN105244841A (en) | CAN-based electric fire monitoring device | |
| CN202022663U (en) | Torque limiting device with automatic sensor cable breakage detection function | |
| CN106130166A (en) | Redundant power module circuit | |
| CN203839920U (en) | Plastic shell type residual current protector having remote residual current tripping alarm function | |
| CN207945115U (en) | A kind of aspirating smoke detector fan safe drive module | |
| CN102332697A (en) | Measuring transient electrical activity in aircraft power distribution systems | |
| KR100610258B1 (en) | Intelligent power automatic recovery system | |
| CN201898320U (en) | Automatic protector for orbit electrical equipment | |
| CN212322403U (en) | Combustible gas detection alarm device | |
| CN203352155U (en) | Microcomputer monitoring protecting device for current transformer | |
| CN220475397U (en) | Overcurrent protection circuit for intelligent jar wheel | |
| CN220271538U (en) | Current transformer access detection system | |
| CN206117495U (en) | Voltage stabilizer | |
| CN205610202U (en) | Power leakage protector | |
| CN204833033U (en) | Monitoring type constant voltage power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhao Zigang Inventor after: Wei Chen Inventor after: Wang Hui Inventor after: Zhang Lili Inventor after: Han Yu Inventor after: Wang Yixuan Inventor before: Zhao Zigang Inventor before: Wei Chen Inventor before: Wang Hui Inventor before: Zhang Lili Inventor before: Han Yu |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: ZHAO ZIGANG WEI CHEN WANG HUI ZHANG LILI HAN YU TO: ZHAO ZIGANG WEI CHEN WANG HUI ZHANG LILI HAN YU WANG YIXUAN |
|
| 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: 20130227 Termination date: 20200504 |