CN204269750U - Diode open-circuit testing circuit - Google Patents
Diode open-circuit testing circuit Download PDFInfo
- Publication number
- CN204269750U CN204269750U CN201420231053.XU CN201420231053U CN204269750U CN 204269750 U CN204269750 U CN 204269750U CN 201420231053 U CN201420231053 U CN 201420231053U CN 204269750 U CN204269750 U CN 204269750U
- Authority
- CN
- China
- Prior art keywords
- diode
- circuit
- anode
- triode
- open
- 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.)
- Active
Links
Landscapes
- Alarm Systems (AREA)
Abstract
Power grid user will understand the open circuit situation of any one diode in the commutation diode module of common anode pole, to prevent the generation of communication facilities disconnection fault in advance, so will detect the open circuit situation of common any one diode of anode rectification duodiode module.The utility model discloses a kind of by normally to be worked by diode and the voltage difference caused of opening a way is incorporated into on-off circuit, and then impact output signal, realizes the object that diode open-circuit detects automatically.Diode circuit to be detected connects power supply, arrange an on-off circuit, this on-off circuit comprises the port that two connect diode anode to be detected and negative electrode respectively, also comprises the port for output detections signal, on-off circuit according to the break-make of diode to be detected, output detections signal.
Description
Technical field
The utility model relates in two DC output power row cabinets of electrical network communication DC power supply collocation use, for detecting the open-circuit condition of normally used wherein any one diode of anode rectification duodiode module altogether of single service communication facilities, and relate to single or multiple diode open-circuit state-detection.
Background technology
As shown in Figure 1, usually to arrange in pairs or groups the DC output power row cabinet used by DC power system with the communication system of power grids, wherein for the communication facilities of single power supply, the mode of common anode pole commutation diode module can be adopted, 2 tunnels independently direct supply through common anode pole commutation diode connect after, power to 1 communication facilities, using as backup simultaneously.
Because power grid user will understand the open circuit situation of any one diode in the commutation diode module of common anode pole, to prevent the generation of communication facilities disconnection fault in advance, so the open circuit situation of common any one diode of anode rectification duodiode module will be detected.And the actual DC output power row cabinet used; some does not have configuration detection circuit at all; or the testing circuit of configuration needs personnel manually to carry out starting switch one by one to each diode detection switch to device context just to test; and be its testing circuit of protection; after test terminates, necessary circuit disconnect switch, therefore can not reach the object of unattended monitoring automatic alarm.
Summary of the invention
In view of prior art exists above-mentioned deficiency, technical problem to be solved in the utility model is: provide a kind of diode open-circuit testing circuit, and by on-off circuit such as photoelectrical coupler, triode, field effect transistor etc., wherein two ends connect diode to be detected.If diode either open state to be detected, then from wherein one end output detections signal of on-off circuit.Then, can process detection signal, make it into the appreciable sound and light signal of behaviour, or use single-chip microcomputer, PLC etc. to utilize detection signal to carry out the control of robotization to a certain module, element etc.The technical scheme that the utility model solves the problem is as follows:
By diode normally to be worked and the voltage difference caused of opening a way is incorporated into on-off circuit, and then impact output signal, realize the object that diode open-circuit detects automatically.Diode circuit to be detected connects power supply, arrange an on-off circuit, this on-off circuit comprises the port that two connect diode anode to be detected and negative electrode respectively, also comprises the port for output detections signal, on-off circuit according to the break-make of diode to be detected, output detections signal.
This circuit also can be used as usual diodes open-circuit condition testing circuit.The port that described on-off circuit is used for output detections signal can connect Alarm Unit, by Alarm Unit, detection signal is converted into optical signal and or voice signal.
Preferably, adopt photoelectrical coupler as on-off circuit.The anode of photoelectrical coupler light emitting diode (11) is connected with the anode of diode to be detected, negative electrode is connected with the negative electrode of diode to be detected, the collector of photoelectrical coupler triode (21) is connected with power supply, the emitter output detections signal of photoelectrical coupler triode (21).
Further; for described circuit arranges protection circuit; resistance element (12) is also connected with between the anode of light emitting diode (11) and the anode of diode to be detected; also comprise diode (13); the negative electrode of light emitting diode (11) connects the anode of diode (13), then is connected the negative electrode of diode to be detected by the negative electrode of diode (13).
In addition, in order to prevent the described circuit of multiple parallel connection from interfering with each other, also through diode (23) before described detection signal exports, the emitter of triode (21) is connected with the anode of diode (23).
Further, detection signal is changed into the signal easily observed and obtaining.Alarm Unit comprises light emitting diode (22), and its anode is connected with the emitter of triode (21), its plus earth, is also connected with resistance element (24) between the emitter of triode (21) and the anode of light emitting diode (22).Also comprise enhancement mode field effect transistor or triode (31), its grid or base stage are connected with the output terminal of detecting unit, its source electrode or grounded emitter, one end of its drain electrode or collector connection relay input side, another termination power of relay input side, the output terminal of relay connects sounding component.
Further, utilize field effect transistor and relay, detection signal is replaced into stronger signal.Also comprise relay (32), its input circuit connects drain electrode and the power supply of field effect transistor (31) respectively.
Preferably; for foregoing circuit adds protection circuit; described circuit also comprises voltage stabilizing diode (33) and sectional pressure element (34); negative electrode and the anode of voltage stabilizing diode (33) are connected the grid of field effect transistor or triode (31) or base stage and source electrode or emitter respectively; the two ends of sectional pressure element (34) connect the grid of field effect transistor or triode (31) or base stage and source electrode or emitter respectively; the grid of scene effect pipe or triode (31) or between base stage and the output terminal of detecting unit, also comprises sectional pressure element (35).
Accompanying drawing explanation
Fig. 1 is the circuit diagram of common anode pole commutation diode example.
Fig. 2 is the theory diagram of a specific embodiment of circuit described in the utility model.
Fig. 3 is the open-circuit condition testing circuit of circuit described in the utility model.
Fig. 4 is the alarm circuit of circuit described in the utility model.
Embodiment
As shown in Figure 2, whole diode open-circuit testing circuit is made up of open-circuit condition testing circuit, alarm indicator circuit and alarm signal output circuit.
See Fig. 3, described open-circuit condition testing circuit is by current-limiting resistance 12, and the input end of photoelectrical coupler and light emitting diode one end, anti-voltage counterattack diode 13 forms.The light emitting diode 11 of current-limiting resistance 12 pairs of photoelectrical couplers carries out current-limiting protection, and the light emitting diode 11 of diode 13 pairs of photoelectrical couplers carries out anti-reverse breakdown protection.The alarm indicator electricity output terminal of routing optocoupler and triode one end, current-limiting resistance 24, light emitting diode 22 form.The output triode 21 of current-limiting resistance 24 pairs of light emitting diodes 22 and photoelectrical coupler carries out current-limiting protection.Alarm signal output circuit is filled with diode 23 by the triode of photoelectrical coupler, counnter attack and is formed.Interfering with each other when diode 23 can prevent the alarm signal output-parallel of multiple open circuit detector from working is filled with in counnter attack.
Make an explanation for the situation of common anode pole especially, example as shown in Figure 1, communication power supply adopts-48V direct current supply mode, and namely+the 48V of all 48V direct supplys is shorted to and goes up safely, forms equipotential, and-the 48V of each power supply exports then independent separately.During owing to normally working, the current potential clamper that diode current flow is formed, the terminal voltage of common anode rectification duodiode is made to be clamped at about 0.8V, be not enough to the light emitting diode of the photoelectrical coupler of conducting diode open-circuit condition testing circuit, so 2 independent current sources must have voltage difference, the LEDs ON of the photoelectrical coupler of diode open-circuit state detection circuit just can be made.This voltage difference can be obtained by Remote Computer Center remote circuit boosted voltage, or timing boosted voltage obtains in the supply, and its method, can take prior art automatically to realize, also manually can realize, there is not obstacle.During detected one of them diode open-circuit of anode rectification duodiode module altogether, the voltage difference at diode two ends makes the input end LEDs ON of photoelectrical coupler also luminous, after the photosensitive conducting of its output terminal triode, form loop by the triode of power supply, photoelectric coupler output end, current-limiting resistance 24, light emitting diode 22, make light emitting diode 22 conducting luminous.
As for common cathode or single diode, then get final product work without the need to making it produce potential difference (PD).
When detected diode normally, photoelectrical coupler output triode is by state, it is high-impedance state between triode collector and emitter, emitter and power-electrode resistance are much smaller than collector and transmitting electrode resistance, make between emitter and power cathode close to equipotential, diode 23 is filled with in the counnter attack of alarm signal output circuit cannot conducting, and no signal exports.When detected diode open-circuit, the conducting of photoelectrical coupler output triode, but the voltage between its collector and emitter is minimum, close to state of saturation, between emitter and power cathode, voltage difference is close to supply voltage, diode 23 conducting is filled with in counnter attack, and exporting with power cathode is the high level alarm signal on ground.
See Fig. 4, described warning signal generator circuit is made up of power supply, enhancement mode field effect transistor and driving circuit thereof, relay.The high level signal driving field effect transistor that diode 23 exports is filled with in counnter attack, and relay coil is energized, and normally opened contact closes, and forms dry contact alarm signal.
Claims (10)
1. a diode open-circuit testing circuit, it is characterized in that, comprise on-off circuit, this on-off circuit comprises input end, output terminal, control end, its input end, control end are connected with diode anode to be detected and negative electrode respectively, on-off circuit according to the break-make of diode to be detected, by output terminal, output detections signal.
2. diode open-circuit testing circuit as claimed in claim 1, is characterized in that, described on-off circuit is photoelectrical coupler or triode or field effect transistor.
3. diode open-circuit testing circuit as claimed in claim 1, is characterized in that, the port that described on-off circuit is used for output detections signal connects Alarm Unit, and detection signal is converted into optical signal and or voice signal by Alarm Unit.
4. diode open-circuit testing circuit as claimed in claim 2, it is characterized in that, described on-off circuit is photoelectrical coupler, the anode of photoelectrical coupler light emitting diode (11) is connected with the anode of diode to be detected, negative electrode is connected with the negative electrode of diode to be detected, the collector of photoelectrical coupler triode (21) is connected with power supply, the emitter output detections signal of photoelectrical coupler triode (21).
5. diode open-circuit testing circuit as claimed in claim 4, it is characterized in that, resistance element (12) is also connected with between the anode of light emitting diode (11) and the anode of diode to be detected, also comprise diode (13), the negative electrode of light emitting diode (11) connects the anode of diode (13), then is connected the negative electrode of diode to be detected by the negative electrode of diode (13).
6. diode open-circuit testing circuit as claimed in claim 4, is characterized in that, also through diode (23) before detection signal exports, the emitter of triode (21) is connected with the anode of diode (23).
7. diode open-circuit testing circuit as claimed in claim 3, it is characterized in that, Alarm Unit comprises light emitting diode (22), its anode is connected with the emitter of triode (21), its plus earth, is also connected with resistance element (24) between the emitter of triode (21) and the anode of light emitting diode (22).
8. diode open-circuit testing circuit as claimed in claim 7, it is characterized in that, described Alarm Unit comprises enhancement mode field effect transistor or triode (31), its grid or base stage are connected with the output terminal of detecting unit, its source electrode or grounded emitter, one end of its drain electrode or collector connection relay input side, another termination power of relay input side, the output terminal of relay connects sounding component.
9. diode open-circuit testing circuit as claimed in claim 8, it is characterized in that, also comprise relay (32), its input circuit connects drain electrode and the power supply of field effect transistor (31) respectively.
10. diode open-circuit testing circuit as claimed in claim 9, it is characterized in that, also comprise voltage stabilizing diode (33) and sectional pressure element (34), negative electrode and the anode of voltage stabilizing diode (33) are connected the grid of field effect transistor or triode (31) or base stage and source electrode or emitter respectively, the two ends of sectional pressure element (34) connect the grid of field effect transistor or triode (31) or base stage and source electrode or emitter respectively, the grid of scene effect pipe or triode (31) or between base stage and the output terminal of detecting unit, also comprises sectional pressure element (35).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420231053.XU CN204269750U (en) | 2014-05-07 | 2014-05-07 | Diode open-circuit testing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420231053.XU CN204269750U (en) | 2014-05-07 | 2014-05-07 | Diode open-circuit testing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204269750U true CN204269750U (en) | 2015-04-15 |
Family
ID=52804611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420231053.XU Active CN204269750U (en) | 2014-05-07 | 2014-05-07 | Diode open-circuit testing circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204269750U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109406998A (en) * | 2018-12-11 | 2019-03-01 | 株洲田龙铁道电气股份有限公司 | A kind of test device and test method of nonpolarity stem grafting dot circuit |
| CN109738774A (en) * | 2018-11-29 | 2019-05-10 | 西北工业大学 | A kind of diode detection instrument |
| CN109752990A (en) * | 2018-11-29 | 2019-05-14 | 西北工业大学 | A kind of control of multi-channel circuit on-off and voltage collecting device |
-
2014
- 2014-05-07 CN CN201420231053.XU patent/CN204269750U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109738774A (en) * | 2018-11-29 | 2019-05-10 | 西北工业大学 | A kind of diode detection instrument |
| CN109752990A (en) * | 2018-11-29 | 2019-05-14 | 西北工业大学 | A kind of control of multi-channel circuit on-off and voltage collecting device |
| CN109752990B (en) * | 2018-11-29 | 2023-12-05 | 西北工业大学 | Multichannel circuit on-off control and voltage acquisition device |
| CN109406998A (en) * | 2018-12-11 | 2019-03-01 | 株洲田龙铁道电气股份有限公司 | A kind of test device and test method of nonpolarity stem grafting dot circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105978485B (en) | A kind of photovoltaic module online test method | |
| CN105355513B (en) | Electromagnetic type relay redundancy control system | |
| CN103941135B (en) | Short circuit detection method and device | |
| CN204269750U (en) | Diode open-circuit testing circuit | |
| CN204347214U (en) | A kind of injection type power generator carbon brush contact detecting apparatus | |
| CN209029980U (en) | It is a kind of to ensure the smart home power supply monitoring system not powered off | |
| CN103713232A (en) | Intelligent alarm capable of preventing battery reverse polarity | |
| CN206710530U (en) | Cable core break-make detects warning device | |
| CN107340471A (en) | High-voltage relay adhesion real-time detecting system and detection method | |
| CN207457454U (en) | Ion blower failure detection circuit and detector | |
| CN206332432U (en) | Dc bus under-voltage protecting circuit of the low cost with isolation self-locking | |
| CN203367969U (en) | Overcurrent protection circuit of data unit | |
| CN201828604U (en) | Direct-current insulation monitoring device | |
| CN204720956U (en) | A kind of three-phase uninterrupted power supply with lack detection circuit | |
| CN203772980U (en) | Wiring structure used for detecting passive switch signal | |
| CN207289123U (en) | A kind of device that can monitor welding machine arc state | |
| CN206270469U (en) | Variable connector status monitor circuit | |
| CN204129897U (en) | The warning circuit of real-time monitoring fire omen early warning | |
| CN210294862U (en) | Equipment restarting device and monitoring system | |
| CN204575732U (en) | A kind of electrokinetic cell voltage sampling circuit | |
| CN207263872U (en) | A kind of substation secondary cable sorter | |
| CN208092205U (en) | A kind of closed-loop detection circuit for detecting relay output state | |
| CN105187118B (en) | Terminal device and its hair optical detection circuit | |
| CN205847199U (en) | A kind of photovoltaic module on-line detecting system | |
| CN205594378U (en) | Electron product aging's monitoring device and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |