CN203632349U - A power supply circuit for a mining video camera - Google Patents
A power supply circuit for a mining video camera Download PDFInfo
- Publication number
- CN203632349U CN203632349U CN201320824915.5U CN201320824915U CN203632349U CN 203632349 U CN203632349 U CN 203632349U CN 201320824915 U CN201320824915 U CN 201320824915U CN 203632349 U CN203632349 U CN 203632349U
- Authority
- CN
- China
- Prior art keywords
- video camera
- conversion circuit
- power supply
- output
- down conversion
- 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
Images
Landscapes
- Studio Devices (AREA)
Abstract
The utility model relates to a power supply circuit for a mining video camera. The power supply circuit comprises a first voltage reduction conversion circuit, a second voltage reduction conversion circuit, a controller, a switching tube, an MOS tube and a storage battery. An output end of the first voltage reduction conversion circuit is electrically connected with an input end of the second voltage reduction conversion circuit. An output end of the second voltage reduction conversion circuit is electrically connected with the controller. An output end of the controller is connected with an input end of the switching tube. An output end of the switching tube is connected with a first connecting end of the MOS tube. A second connecting end of the MOS tube is connected with the storage cell. The power supply circuit switches the power supply from the mains supply to the storage battery for continuing to supply power for the video camera when the mains supply is cut.
Description
Technical field
The utility model relates to a kind of mining video monitoring equipment, is specifically related to a kind of power supply circuits of mining video camera.
Background technology
Coal is the important energy source of China, accounts for 70% of primary energy.China's coal-mine more than 95% is that adopt down-hole, the sound development that coal saving condition is poor, mining depth is dark, gas, coal dust, floods, fire, bump, underground heat etc. are perplexing coal industry, and coal industry is the high risk industries in industrial and mining enterprises of China always.Analyze reason, the problems such as existing managerial confusion, low, the safe insufficient investment of peopleware, scientific research weakness, have again under coal mine the problems such as video monitoring equipment falls behind.
Video monitoring can be in real time, image, reflect truly the state of monitored object, is convenient to storage, can improve the efficiency of management and automatization level, pinpoints the problems and analysis afterwards while being convenient to urgency.Video camera is one of core building block in video monitoring system, under coal mine, widely used video camera major part is analog signal output at present, be divided into two kinds of modes of analog electrical signal output and analog optical signal output, for the video camera of analog electrical signal output have that transmission range is short, poor signal quality, the easy shortcoming that is disturbed, the video camera of exporting for analog optical signal needs point-to-pointly toward aboveground laying optical cable, exist networking model single, quantities is large, the shortcoming that networking cost is high, and adopt the video camera of analog signal output also to have following limitation: widely used video camera is gunlock under coal mine, angle is fixed, can only same angle catch image, monitoring range is restricted, the video camera that other ore deposit is used is analog video camera, performance and stability are not high, analog video signal easily produces attenuation, distortion, time delay, and being subject to down-hole various device disturbs, make image quality decrease, while being used for complicated working site, effect is bad, secondly, the transmission of analog video signal is adjusted the distance very responsive, in the time that transmission range is greater than hundreds of rice, is not easy to safeguard and upgrading, finally, each analog video camera needs a cable, expansion difficulty, and maintenance cost is high.
Although existing data shows that the problem of above-mentioned video camera is resolved,, for video camera, aspect power supply, what adopt at present is that civil power is powered, and when after mains failure, video camera cannot carry out work, and therefore, electric supply installation has pending improvement.
Summary of the invention
For the deficiencies in the prior art, the utility model provides a kind of power supply circuits of mining video camera, and it is that video camera continues power supply that the utility model can be switched to storage battery after mains failure.
The technical scheme solving the problems of the technologies described above is as follows:
The power supply circuits of mining video camera, comprise the first step-down conversion circuit, the second step-down conversion circuit, controller, switching tube, metal-oxide-semiconductor and storage battery, the output of the first step-down conversion circuit is electrically connected with the input of the second step-down conversion circuit, the output of the second step-down conversion circuit is electrically connected with controller, the output of controller is connected with the input of switching tube, the output of switching tube is connected with the first link of metal-oxide-semiconductor, and the second link of metal-oxide-semiconductor is connected with storage battery.
Described the first step-down conversion circuit comprises decompression transformation chip, filter capacitor, and filter capacitor is electrically connected on the output of decompression transformation chip.
The model of described decompression transformation chip is BX8207.
Described the second step-down conversion circuit is one and is output as the reference voltage chip of 5 volts.
Described controller is single-chip microcomputer.
Described switching tube is triode.
Adopt such scheme, the in the situation that of not power-off of civil power, by the first step-down conversion circuit, the high voltage of 127 volts has been converted to the low-voltage output of 12 volts, thereby powered for video camera.In the time that needs switch to storage battery and power for it, because the output voltage of the first step-down conversion circuit is converted to the Voltage-output of 5 volts by the second step-down conversion circuit, offering controller uses, the pipe conducting of controller control switch and output current, the output current of switching tube turn-offs metal-oxide-semiconductor, when after civil power power-off, switching tube turn-offs, thereby no current output, the electric current of storage battery flows through metal-oxide-semiconductor like this, thereby provides operating voltage for load video camera.
Accompanying drawing explanation
The electrical block diagram of 1 power supply circuits that are mining video camera of the present utility model in figure;
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further.
With reference to Fig. 1, the power supply circuits of mining video camera of the present utility model, comprise the first step-down conversion circuit, the second step-down conversion circuit, controller, switching tube, metal-oxide-semiconductor VT2 and storage battery BT.Described the first step-down conversion circuit comprises decompression transformation chip J2, filter capacitor C3 and filter capacitor C4, diode V10, light-emitting diode V12 and resistance R 22, and filter capacitor is electrically connected on the output of decompression transformation chip.The model of decompression transformation chip is BX8207.One end of filter capacitor C3 and filter capacitor C4 is connected in the cathode output end of decompression transformation chip J2, the equal ground connection of the other end, the anode tap of diode V10 is connected with the cathode output end of decompression transformation chip J2, the cathode terminal of diode V10 is connected with one end of resistance R 22, the other end of resistance R 22 is connected with the anode tap of light-emitting diode V12, the cathode terminal ground connection of light-emitting diode V12.The output of the first step-down conversion circuit is electrically connected with the input of the second step-down conversion circuit, and the second step-down conversion circuit is one and is output as the reference voltage chip D2 of 5 volts.The output of the second step-down conversion circuit is electrically connected with controller, and described controller is single-chip microcomputer D4.The output of controller is connected with the input of switching tube, and the output of switching tube is connected with the first link of metal-oxide-semiconductor VT2.Switching tube is triode VT3, and the output of controller is connected with the base stage of triode VT3 by resistance R 13, the grounded emitter of triode VT3, and the collector electrode of triode VT3 is connected with the first link of metal-oxide-semiconductor.The second link of metal-oxide-semiconductor VT2 is connected with storage battery BT, and the 3rd link (output) of metal-oxide-semiconductor VT2 connects by a diode.
Claims (6)
1. the power supply circuits of mining video camera, it is characterized in that: comprise the first step-down conversion circuit, the second step-down conversion circuit, controller, switching tube, metal-oxide-semiconductor and storage battery, the output of the first step-down conversion circuit is electrically connected with the input of the second step-down conversion circuit, the output of the second step-down conversion circuit is electrically connected with controller, the output of controller is connected with the input of switching tube, the output of switching tube is connected with the first link of metal-oxide-semiconductor, and the second link of metal-oxide-semiconductor is connected with storage battery.
2. the power supply circuits of mining video camera according to claim 1, is characterized in that: described the first step-down conversion circuit comprises decompression transformation chip, filter capacitor, and filter capacitor is electrically connected on the output of decompression transformation chip.
3. the power supply circuits of mining video camera according to claim 2, is characterized in that: the model of described decompression transformation chip is BX8207.
4. the power supply circuits of mining video camera according to claim 1, is characterized in that: described the second step-down conversion circuit is one and is output as the reference voltage chip of 5 volts.
5. the power supply circuits of mining video camera according to claim 1, is characterized in that: described controller is single-chip microcomputer.
6. the power supply circuits of mining video camera according to claim 1, is characterized in that: described switching tube is triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320824915.5U CN203632349U (en) | 2013-12-13 | 2013-12-13 | A power supply circuit for a mining video camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320824915.5U CN203632349U (en) | 2013-12-13 | 2013-12-13 | A power supply circuit for a mining video camera |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203632349U true CN203632349U (en) | 2014-06-04 |
Family
ID=50818791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320824915.5U Expired - Fee Related CN203632349U (en) | 2013-12-13 | 2013-12-13 | A power supply circuit for a mining video camera |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203632349U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103715756A (en) * | 2013-12-13 | 2014-04-09 | 常州联力自动化科技有限公司 | Power supply device of mine-used flameproof and intrinsically-safe camera |
-
2013
- 2013-12-13 CN CN201320824915.5U patent/CN203632349U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103715756A (en) * | 2013-12-13 | 2014-04-09 | 常州联力自动化科技有限公司 | Power supply device of mine-used flameproof and intrinsically-safe camera |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107345979B (en) | Insulator leakage current on-line monitoring system | |
| CN105743224B (en) | Operation and maintenance management system of substation | |
| CN203825213U (en) | Portable foundation cloud atlas identifying apparatus | |
| CN103219765B (en) | Photovoltaic charging controller | |
| CN204925314U (en) | Distribution network checkout system that fault locating used | |
| CN104254183A (en) | MPPT (maximum power point tracking)-based wind-solar complementary streetlight controller and control method thereof | |
| CN203632349U (en) | A power supply circuit for a mining video camera | |
| CN203747408U (en) | Power source protection circuit for fault indicator | |
| CN203715726U (en) | Digital remote monitoring corrosion prevention instrument for cathode protection of oil-water well casing | |
| CN102466784A (en) | Standby power supply capacity real-time detection device | |
| CN205229781U (en) | A automatic monitoring system for disperseing water supply well pump station | |
| CN204964674U (en) | Insulating monitoring signal processing system of contact net | |
| CN204131788U (en) | A kind of wind/solar hybrid street light controller based on MPPT | |
| CN204362217U (en) | A kind of power transmission line corridor large-scale moving object limit for height prior-warning device | |
| CN103715756A (en) | Power supply device of mine-used flameproof and intrinsically-safe camera | |
| CN204652757U (en) | A kind of input protection circuit of LED drive power | |
| CN202405190U (en) | Automatic reclosing control circuit with communication function in miniature circuit breaker | |
| CN104901682A (en) | M-Bus host circuit | |
| CN201707398U (en) | Three-phase power supply input open-phase detecting circuit | |
| CN103746450A (en) | Monitoring system of integrated power equipment | |
| CN103812360A (en) | Coal mine anti-explosion DC (direct current) stabilized power supply | |
| CN102843531A (en) | Drive control circuit and television | |
| CN209044817U (en) | Multifunctional electric fire-disaster monitoring device based on Internet of Things | |
| CN202495775U (en) | Solar energy photovoltaic grid-connected power generation system | |
| CN202472891U (en) | Remote repair device for engineering machinery |
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: 20140604 Termination date: 20151213 |
|
| EXPY | Termination of patent right or utility model |