CN204536399U - A kind of alterating and direct current detection system - Google Patents
A kind of alterating and direct current detection system Download PDFInfo
- Publication number
- CN204536399U CN204536399U CN201520217018.7U CN201520217018U CN204536399U CN 204536399 U CN204536399 U CN 204536399U CN 201520217018 U CN201520217018 U CN 201520217018U CN 204536399 U CN204536399 U CN 204536399U
- Authority
- CN
- China
- Prior art keywords
- light emitting
- emitting diode
- utility
- current
- model
- 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 - Lifetime
Links
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
本实用新型涉及检测系统技术领域，公开了一种交直流电检测系统，包括:第一发光二极管、第二发光二极管及限流电阻；第一发光二极管与第二发光二极管反向并联组成并联电路；并联电路的第一端与待测电源连接，并联电路的第二端通过限流电阻接地。本实用新型基于二极管的单向导电性，将两个发光二极管反向并联，当有电流正向流过时，二极管发光，不仅能够检测出交流电和直流电，而且还能检测出直流电的正负电源的极性，有利于用电设备的使用，一方面保证了生产作业的顺利进行，另一方面防止了用电设备不被烧坏，在降低使用成本的基础上，保障了工作人员的人身安全。本实用新型还具有结构简单、便于维护、使用成本低的特点。
The utility model relates to the technical field of detection systems, and discloses an AC/DC detection system, comprising: a first light emitting diode, a second light emitting diode and a current limiting resistor; the first light emitting diode and the second light emitting diode are connected in reverse parallel to form a parallel circuit; The first end of the parallel circuit is connected to the power supply to be tested, and the second end of the parallel circuit is grounded through a current limiting resistor. The utility model is based on the one-way conductivity of the diode, and two light-emitting diodes are connected in reverse parallel. When the current flows forward, the diode emits light. Polarity is conducive to the use of electrical equipment. On the one hand, it ensures the smooth progress of production operations, and on the other hand, it prevents electrical equipment from being burned out. On the basis of reducing the cost of use, it ensures the personal safety of the staff. The utility model also has the characteristics of simple structure, convenient maintenance and low use cost.
Description
Technical field
The utility model relates to detection system technical field, is mainly applicable to alterating and direct current detection system.
Background technology
Current, generally there are the direct supply of 220V and the AC power of 220V in the electrical secondary system of generating plant, transformer station, electric substation etc.Conventional low pressure electroscope is composed in series by neon bulb and current-limiting resistance, cannot distinguish alternating current and the direct current of 220V, more can not distinguish the polarity of the galvanic positive-negative power of 220V.If alternating current and direct current and galvanic positive-negative power polarity cannot be distinguished, then be unfavorable for the use of consumer, carrying out smoothly of production operation may be hindered, time serious, also consumer can be burnt out, not only increase use cost, but also the personal safety of staff is worked the mischief.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of alterating and direct current detection system, and it can not only detect alternating current and direct current, and can also detect the polarity of galvanic positive-negative power.
For solving the problems of the technologies described above, the utility model provides a kind of alterating and direct current detection system, comprising: the first light emitting diode, the second light emitting diode and current-limiting resistance; Described first light emitting diode and described second light emitting diode reverse parallel connection form parallel circuit; The first end of described parallel circuit is connected with power supply to be measured, and the second end of described parallel circuit is by described current-limiting resistance ground connection.
Further, the pressure drop of described first light emitting diode and described second light emitting diode is all between 2-2.5V; The resistance of described current-limiting resistance is 100K Ω, and is
watt metal film current-limiting resistance.
The beneficial effects of the utility model are:
The alterating and direct current detection system that the utility model provides, based on the unilateral conduction of diode, by two light emitting diode reverse parallel connections, when having, electric current positive flow is out-of-date, LED lighting, alternating current and direct current can not only be detected, and the polarity of galvanic positive-negative power can also be detected, be conducive to the use of consumer, ensure that carrying out smoothly of production operation on the one hand, prevent consumer not to be burned on the other hand, on the basis reducing use cost, ensure the personal safety of staff.The utility model also have structure simple, be convenient to the feature safeguarded, use cost is low.
Accompanying drawing explanation
The circuit diagram of the alterating and direct current detection system that Fig. 1 provides for the utility model embodiment.
Embodiment
For setting forth the utility model further for the technological means reaching predetermined utility model object and take and effect, below in conjunction with accompanying drawing and preferred embodiment, be described in detail to according to the embodiment of alterating and direct current detection system that the utility model proposes and principle of work.
See Fig. 1, the alterating and direct current detection system that the utility model embodiment provides, comprising: the first light emitting diode, the second light emitting diode and current-limiting resistance; First light emitting diode and the second light emitting diode reverse parallel connection form parallel circuit; The first end (a end) of parallel circuit is connected with power supply to be measured, and second end (b end) of parallel circuit is by current-limiting resistance ground connection.The selection of the parameter of the first light emitting diode, the second light emitting diode and current-limiting resistance needs to ensure when there being electric current to flow through the first light emitting diode and the second light emitting diode, LED lighting.
The control power supply of transformer station applies the direct supply of 220V usually, and direct supply is generally provided by HF switch, and system monitoring direct supply both positive and negative polarity current-limiting resistance over the ground, is generally set to 99.9K Ω.Thus and the resistance connecing the current-limiting resistance of this circuit can not be less than 99.9K Ω in the state of the equilibrium, direct supply voltage-to-ground is+110V and-110V.For anti-locking system generation misoperation, to the test of direct supply, the current-limiting resistance of equivalence must be greater than 99.9K Ω.Again because the drive current of common light emitting diode is 1-2mA, thus in the utility model embodiment, the pressure drop of the first light emitting diode and the second light emitting diode is all between 2-2.5V, and the first light emitting diode is red common light emitting diode, the second light emitting diode is green common light emitting diode; The resistance of current-limiting resistance is 100K Ω, and is
watt metal film current-limiting resistance.
When detected circuit is DC220V, diode drive current is:
When detected circuit is AC220V, diode drive current is:
Visible, the selection of above-mentioned components and parts, can not only meet the performance requirement of detected circuit, and can reach the drive current of light emitting diode.
In the utility model embodiment, the first end (a end) of parallel circuit is connected with the positive pole of the first light emitting diode.During detection, the first end (a end) of parallel circuit is connect test line, the second end (b end) ground connection.When red light emitting diodes is bright, tested end is the positive pole of the direct supply of 220V; When green LED is bright, tested end is the negative pole of the direct supply of 220V; Hot green light emitting diode complete bright time, tested end is the AC power live wire of 220V; If red and green luminous diode does not all work, tested end is without electricity.
After the utility model embodiment is made into material object, in all previous installation, debugging, fault handling, obtain application.Detect sensitive, reliability is high, and flase drop situation does not occur, and improves construction and accident treatment speed, effectively ensure that normally carrying out of production operation.
The alterating and direct current detection system that the utility model embodiment provides, based on the unilateral conduction of diode, by two light emitting diode reverse parallel connections, when having, electric current positive flow is out-of-date, LED lighting, alternating current and direct current can not only be detected, and the polarity of galvanic positive-negative power can also be detected, be conducive to the use of consumer, ensure that carrying out smoothly of production operation on the one hand, prevent consumer not to be burned on the other hand, on the basis reducing use cost, ensure the personal safety of staff.The utility model embodiment also have structure simple, be convenient to the feature safeguarded, use cost is low.
It should be noted last that, above embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although be described in detail the utility model with reference to example, those of ordinary skill in the art is to be understood that, can modify to the technical solution of the utility model or equivalent replacement, and not departing from the spirit and scope of technical solutions of the utility model, it all should be encompassed in the middle of right of the present utility model.
Claims (2)
1. an alterating and direct current detection system, is characterized in that, comprising: the first light emitting diode, the second light emitting diode and current-limiting resistance; Described first light emitting diode and described second light emitting diode reverse parallel connection form parallel circuit; The first end of described parallel circuit is connected with power supply to be measured, and the second end of described parallel circuit is by described current-limiting resistance ground connection.
2. alterating and direct current detection system as claimed in claim 1, it is characterized in that, the pressure drop of described first light emitting diode and described second light emitting diode is all between 2-2.5V; The resistance of described current-limiting resistance is 100K Ω, and is
watt metal film current-limiting resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520217018.7U CN204536399U (en) | 2015-04-10 | 2015-04-10 | A kind of alterating and direct current detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520217018.7U CN204536399U (en) | 2015-04-10 | 2015-04-10 | A kind of alterating and direct current detection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204536399U true CN204536399U (en) | 2015-08-05 |
Family
ID=53750385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520217018.7U Expired - Lifetime CN204536399U (en) | 2015-04-10 | 2015-04-10 | A kind of alterating and direct current detection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204536399U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108680821A (en) * | 2018-05-28 | 2018-10-19 | 天津市捷威动力工业有限公司 | A kind of novel tooling circuit applied to BMS detections |
-
2015
- 2015-04-10 CN CN201520217018.7U patent/CN204536399U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108680821A (en) * | 2018-05-28 | 2018-10-19 | 天津市捷威动力工业有限公司 | A kind of novel tooling circuit applied to BMS detections |
| CN108680821B (en) * | 2018-05-28 | 2020-12-08 | 天津市捷威动力工业有限公司 | A New Tooling Circuit Applied in BMS Inspection |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103454551A (en) | Three-hole power socket fault detector | |
| CN103001073B (en) | A kind of plug with attemperating unit | |
| CN204536399U (en) | A kind of alterating and direct current detection system | |
| CN202676852U (en) | Fusing monitor for power fuse | |
| CN202340033U (en) | Current overload alarm socket | |
| CN202307765U (en) | Audible and visual alarm fuse device | |
| CN203217045U (en) | Silicon controlled rectifier state tester | |
| CN206163449U (en) | Fuse with self -checking function | |
| CN205484641U (en) | Transmitter insurance trouble display circuit | |
| CN205195233U (en) | Power leakage protector | |
| CN203909097U (en) | Electric shock prevention high-voltage test alarm wire clamp | |
| CN202758012U (en) | Failure indication circuit of high-power heating system | |
| CN204760345U (en) | Fuse supervisory circuits | |
| CN203811738U (en) | Voltage transformer secondary voltage drop test connection state detection device | |
| CN105203872A (en) | Substation terminal box heater monitoring method | |
| CN202916377U (en) | Cable alignment device | |
| CN204376392U (en) | DC motor power circuit | |
| CN205945006U (en) | Over -current protective control circuit | |
| CN202231911U (en) | LED lamp circuit used for refrigerator | |
| CN203310950U (en) | Power supply detector of water heater | |
| CN203688714U (en) | Power line inspection tool | |
| CN203934084U (en) | A kind of fire-fighting induced light testing circuit | |
| CN201656152U (en) | Safety socket | |
| CN205318321U (en) | Computer stand -by power supply links device | |
| CN204271002U (en) | Indicating air circuit breaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20150805 |
|
| CX01 | Expiry of patent term |