CN103715756A - Power supply device of mine-used flameproof and intrinsically-safe camera - Google Patents
Power supply device of mine-used flameproof and intrinsically-safe camera Download PDFInfo
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- CN103715756A CN103715756A CN201310684296.9A CN201310684296A CN103715756A CN 103715756 A CN103715756 A CN 103715756A CN 201310684296 A CN201310684296 A CN 201310684296A CN 103715756 A CN103715756 A CN 103715756A
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Abstract
The invention relates to a power supply device of a mine-used flameproof and intrinsically-safe camera, comprising a first buck conversion circuit, a second buck conversion circuit, a controller, a switching tube, an MOS tube and a storage battery, wherein the output end of the first buck conversion circuit is electrically connected with the input end of the second buck conversion circuit, the output end of the second buck conversion circuit is electrically connected with the controller, the output end of the controller is connected with the input end of the switching tube, the output end of the switching tube is connected with a first connection end of the MOS tube, and a second connection end of the MOS tube is connected with the storage battery. The power supply device can be switched to the storage battery to continue supplying power to the camera after the mains supply fails.
Description
Technical field
The present invention relates to a kind of mining video monitoring equipment, be specifically related to a kind of electric supply installation of mine explosion-suppression and intrinsic safety 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 China industrial and mining enterprises 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 shortcoming that is easily 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, when 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 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 invention provides a kind of electric supply installation of mine explosion-suppression and intrinsic safety video camera, it is that video camera continues power supply that the present invention can be switched to storage battery after mains failure.
The technical scheme solving the problems of the technologies described above is as follows:
The electric supply installation of mine explosion-suppression and intrinsic safety 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 to the input of the second step-down conversion circuit, the output of the second step-down conversion circuit is electrically connected to 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 a reference voltage chip that is output as 5 volts.
Described controller is single-chip microcomputer.
Described switching tube is triode.
Adopted 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.When 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, 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
In figure, 1 is the electrical block diagram of the electric supply installation of mine explosion-suppression and intrinsic safety video camera of the present invention;
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described.
With reference to Fig. 1, the electric supply installation of mine explosion-suppression and intrinsic safety video camera of the present invention, comprises 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 to the input of the second step-down conversion circuit, and the second step-down conversion circuit is a reference voltage chip D2 who is output as 5 volts.The output of the second step-down conversion circuit is electrically connected to 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 electric supply installation of mine explosion-suppression and intrinsic safety 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 to the input of the second step-down conversion circuit, the output of the second step-down conversion circuit is electrically connected to 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 electric supply installation of mine explosion-suppression and intrinsic safety 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 electric supply installation of mine explosion-suppression and intrinsic safety video camera according to claim 2, is characterized in that: the model of described decompression transformation chip is BX8207.
4. the electric supply installation of mine explosion-suppression and intrinsic safety video camera according to claim 1, is characterized in that: described the second step-down conversion circuit is a reference voltage chip that is output as 5 volts.
5. the electric supply installation of mine explosion-suppression and intrinsic safety video camera according to claim 1, is characterized in that: described controller is single-chip microcomputer.
6. the electric supply installation of mine explosion-suppression and intrinsic safety 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 |
|---|---|---|---|
| CN201310684296.9A CN103715756A (en) | 2013-12-13 | 2013-12-13 | Power supply device of mine-used flameproof and intrinsically-safe camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310684296.9A CN103715756A (en) | 2013-12-13 | 2013-12-13 | Power supply device of mine-used flameproof and intrinsically-safe camera |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103715756A true CN103715756A (en) | 2014-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310684296.9A Pending CN103715756A (en) | 2013-12-13 | 2013-12-13 | Power supply device of mine-used flameproof and intrinsically-safe camera |
Country Status (1)
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| CN (1) | CN103715756A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4427899A (en) * | 1981-03-31 | 1984-01-24 | Siemens Aktiengesellschaft | Circuit arrangement for securing the supply voltage supply of an electronic load |
| CN101765274A (en) * | 2010-01-29 | 2010-06-30 | 海洋王照明科技股份有限公司 | LED lamp and drive circuit |
| CN102109829A (en) * | 2009-12-24 | 2011-06-29 | 北京普源精电科技有限公司 | Automatic power-on circuit |
| CN203632349U (en) * | 2013-12-13 | 2014-06-04 | 常州联力自动化科技有限公司 | A power supply circuit for a mining video camera |
-
2013
- 2013-12-13 CN CN201310684296.9A patent/CN103715756A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4427899A (en) * | 1981-03-31 | 1984-01-24 | Siemens Aktiengesellschaft | Circuit arrangement for securing the supply voltage supply of an electronic load |
| CN102109829A (en) * | 2009-12-24 | 2011-06-29 | 北京普源精电科技有限公司 | Automatic power-on circuit |
| CN101765274A (en) * | 2010-01-29 | 2010-06-30 | 海洋王照明科技股份有限公司 | LED lamp and drive circuit |
| CN203632349U (en) * | 2013-12-13 | 2014-06-04 | 常州联力自动化科技有限公司 | A power supply circuit for a mining video camera |
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Application publication date: 20140409 |