CN203572908U - Power-failure status detection alarm circuit - Google Patents
Power-failure status detection alarm circuit Download PDFInfo
- Publication number
- CN203572908U CN203572908U CN201320738304.9U CN201320738304U CN203572908U CN 203572908 U CN203572908 U CN 203572908U CN 201320738304 U CN201320738304 U CN 201320738304U CN 203572908 U CN203572908 U CN 203572908U
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- Prior art keywords
- field effect
- effect transistor
- power
- optical coupling
- coupling isolator
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Abstract
The utility model discloses a power-failure status detection alarm circuit. The power-failure status detection alarm circuit comprises an optical coupling isolator and a field effect transistor, wherein a resistor R2 is connected between an output end of the optical coupling isolator and the ground, the output end of the optical coupling isolator is connected with a grid of the field effect transistor, a capacitor is connected between the grid of the field effect transistor and the ground, a drain electrode of the field effect transistor is connected with a power source through a resistor R3, the drain electrode of the field effect transistor is connected with a cathode of a diode, an anode of the diode is connected with a source electrode of the field effect transistor, a buzzer is connected between the source electrode of the field effect transistor and the ground, and the field effect transistor is a P-type field effect transistor. The power-failure status detection alarm circuit is advantaged in that the power-failure status detection alarm circuit is connected in a power supply circuit to detect a power-failure status and alarms during power failure, so the power-failure status detection alarm circuit is convenient for a maintainer to carry out maintenance of the line.
Description
Technical field
The utility model relates to integrated circuit fields, relates in particular a kind of outage condition and detects warning circuit.
Background technology
In a lot of occasions, for example: commercial production control, hospital, server etc., it can not have a power failure, and power-off suddenly not only will bring massive losses to production, also will bring irreparable fault to medical treatment, bring serious threat to people's life security.Due to the connection problem of aging of circuit, especially, in circuit is built building for a long time, aging circuit is individual very distinct issues, after circuit disconnects, maintenance is a very loaded down with trivial details problem, need check each branch, detect again the node of power-off, then keep in repair.
Utility model content
The utility model provides a kind of outage condition to detect warning circuit, and it is connected in feed circuit, can detect powering-off state, at power-off alarm, is convenient to personnel circuit is keeped in repair.
For solving above-mentioned technical matters, the utility model by the following technical solutions:
Outage condition detects warning circuit, it comprises optical coupling isolator and field effect transistor, between the output terminal of described optical coupling isolator and ground, be connected with resistance R 2, the output terminal of described optical coupling isolator is connected on the grid of field effect transistor, between the grid of described field effect transistor and ground, be connected with electric capacity, the drain electrode of described field effect transistor is connected with power supply by resistance R 3, the drain electrode of described field effect transistor is connected on the negative electrode of diode, on the source electrode of the anodic bonding being on the scene effect pipe of described diode, between the source electrode of described field effect transistor and ground, be connected with hummer, described field effect is P type field effect transistor.
Further technical scheme is:
As preferably, the input end of described optical coupling isolator is connected with resistance R 1.
Further, the resistance of described resistance R 1 is 45 kilohms-50 kilohms.
As preferably, the grid of described field effect transistor is connected on the output terminal of optical coupling isolator by resistance R 4.
As preferably, the model of described optical coupling isolator is TLP126.
Compared with prior art, the beneficial effects of the utility model are:
1, the utility model is connected in feed circuit or branch circuit, and when circuit or branch circuit power-off, it starts to report to the police, and is convenient to personnel and finds power-off branch and deenergizing circuit is keeped in repair.
2, circuit structure of the present utility model is simple, with low cost, is easy to realize.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.Embodiment of the present utility model includes but not limited to the following example.
[embodiment]
Outage condition as shown in Figure 1 detects warning circuit, it comprises optical coupling isolator and field effect transistor, between the output terminal of described optical coupling isolator and ground, be connected with resistance R 2, the output terminal of described optical coupling isolator is connected on the grid of field effect transistor, between the grid of described field effect transistor and ground, be connected with electric capacity, the drain electrode of described field effect transistor is connected with power supply by resistance R 3, the drain electrode of described field effect transistor is connected on the negative electrode of diode, on the source electrode of the anodic bonding being on the scene effect pipe of described diode, between the source electrode of described field effect transistor and ground, be connected with hummer, described field effect is P type field effect transistor.
In the utility model, the input end of optical coupling isolator is directly connected in power-supply circuit or circuit branch, when not having a power failure, optical coupling isolator work, voltage in resistance R 2 approaches field effect transistor Vdd, field effect transistor cut-off, and warning device hummer is not worked.Electric capacity, for stablizing the voltage of fet gate, prevents that alternating voltage zero-crossing from change too greatly grid voltage and producing misoperation.When circuit or branch road power-off, optical coupling isolator is not worked, field effect transistor conducting, and warning circuit is started working.
For optical coupling isolator is protected, the input end of described optical coupling isolator is connected with resistance R 1.1 metering function of resistance R, avoids that electric current is excessive to cause damage to optical coupling isolator.
For better protection is to optical coupling isolator, the resistance of described resistance R 1 is 45 kilohms-50 kilohms.
For field effect transistor is protected, the grid of described field effect transistor is connected on the output terminal of optical coupling isolator by resistance R 4.The same metering functions that rise of resistance R 4, avoid that electric current is excessive to cause damage to field effect transistor.
In order further to strengthen performance of the present utility model, the model of described optical coupling isolator is TLP126.The superior performance of TLP126, power consumption is little, and reliability is high, can improve the overall performance of this circuit.
Be as mentioned above embodiment of the present utility model.The utility model is not limited to above-mentioned embodiment, and anyone should learn the structural change of making under enlightenment of the present utility model, every with the utlity model has identical or close technical scheme, within all falling into protection domain of the present utility model.
Claims (5)
1. outage condition detects warning circuit, it is characterized in that: it comprises optical coupling isolator and field effect transistor, between the output terminal of described optical coupling isolator and ground, be connected with resistance R 2, the output terminal of described optical coupling isolator is connected on the grid of field effect transistor, between the grid of described field effect transistor and ground, be connected with electric capacity, the drain electrode of described field effect transistor is connected with power supply by resistance R 3, the drain electrode of described field effect transistor is connected on the negative electrode of diode, on the source electrode of the anodic bonding being on the scene effect pipe of described diode, between the source electrode of described field effect transistor and ground, be connected with hummer, described field effect is P type field effect transistor.
2. outage condition according to claim 1 detects warning circuit, it is characterized in that: the input end of described optical coupling isolator is connected with resistance R 1.
3. outage condition according to claim 2 detects warning circuit, it is characterized in that: the resistance of described resistance R 1 is 45 kilohms-50 kilohms.
4. outage condition according to claim 1 detects warning circuit, it is characterized in that: the grid of described field effect transistor is connected on the output terminal of optical coupling isolator by resistance R 4.
5. outage condition according to claim 1 detects warning circuit, it is characterized in that: the model of described optical coupling isolator is TLP126.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320738304.9U CN203572908U (en) | 2013-11-21 | 2013-11-21 | Power-failure status detection alarm circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320738304.9U CN203572908U (en) | 2013-11-21 | 2013-11-21 | Power-failure status detection alarm circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203572908U true CN203572908U (en) | 2014-04-30 |
Family
ID=50540635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320738304.9U Expired - Fee Related CN203572908U (en) | 2013-11-21 | 2013-11-21 | Power-failure status detection alarm circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203572908U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558501A (en) * | 2013-11-21 | 2014-02-05 | 成都市宏山科技有限公司 | Outage condition detection circuit |
| CN104635020A (en) * | 2014-12-26 | 2015-05-20 | 国家电网公司 | Energy-saving and environment-friendly remote alarm circuit for power outage |
| CN108594626A (en) * | 2018-02-10 | 2018-09-28 | 深圳和而泰智能控制股份有限公司 | A kind of power down clocking method and its circuit, electronic equipment |
-
2013
- 2013-11-21 CN CN201320738304.9U patent/CN203572908U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558501A (en) * | 2013-11-21 | 2014-02-05 | 成都市宏山科技有限公司 | Outage condition detection circuit |
| CN104635020A (en) * | 2014-12-26 | 2015-05-20 | 国家电网公司 | Energy-saving and environment-friendly remote alarm circuit for power outage |
| CN104635020B (en) * | 2014-12-26 | 2019-04-02 | 国家电网公司 | A kind of energy-saving and environment-friendly power-off remote alarms circuit |
| CN108594626A (en) * | 2018-02-10 | 2018-09-28 | 深圳和而泰智能控制股份有限公司 | A kind of power down clocking method and its circuit, electronic equipment |
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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: 20140430 Termination date: 20141121 |
|
| EXPY | Termination of patent right or utility model |