CN205545672U - Power supply unit of SDI mode - Google Patents
Power supply unit of SDI mode Download PDFInfo
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- CN205545672U CN205545672U CN201620098332.2U CN201620098332U CN205545672U CN 205545672 U CN205545672 U CN 205545672U CN 201620098332 U CN201620098332 U CN 201620098332U CN 205545672 U CN205545672 U CN 205545672U
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Abstract
The utility model relates to a power supply unit of SDI mode. The SDI power module that with this control module be connected is reached including control module, SDI power module includes power supply switching, power change -over switch, first power, second source and first resistance, power supply switching's one end warp power change -over switch is connected with first power, second source respectively, power supply switching's the other end with first ohmic connection, SDI power module realizes detecting voltage and current signal through the SDI coaxial cable input through first resistance, control module controls according to the voltage that detects and current signal power supply switching, the power change -over switch to SDI power module. The utility model discloses can reduce video monitoring's wiring, can utilize a coaxial cable can realize the video signal transmission of camera power supply harmony, improve the reliability of system's work and simplified system's overall arrangement wiring.
Description
Technical field
This utility model relates to the electric supply installation of a kind of SDI pattern.
Background technology
At present under real-time detection requires higher occasion, still the means using analog video carry out video image acquisition, but such detection means can not meet visual detection fine definition, high intelligential requirement, in order to carry out the transmission of HD video, existing frequently-used means are exactly parallel data transmission, such as CAMERA Link, DVI or HDMI, these transmission means are required for again improving existing engineering, or engineering entirety needs to redesign, in terms of the transformation of engineering cost or system, input amount is bigger, to such an extent as to the enforcement of propelling HD video detection is slow.
Detect now for non real-time occasion, mainly use network service, in order to reduce the powerup issue of wiring, transmit voltage signal during network service simultaneously, but this being designed to transmits image, but network transmission needs to be compressed video or need being transmitted according to procotol, thus affects the definition of image and the requirements of real time of video.
Summary of the invention
The purpose of this utility model is for the two not enough, proposes the electric supply installation of a kind of SDI pattern, in the case of not changing present system engineering, uses skew sdi high definition video interface with voltage to replace the system that the most traditional analog video gathers.
For achieving the above object, the technical solution of the utility model is: the electric supply installation of a kind of SDI pattern, including control module and the SDI supply module that is connected with this control module, described SDI supply module includes power switch, power change-over switch, first power supply, second source and the first resistance, one end of described power switch through described power change-over switch respectively with the first power supply, second source connects, the other end of described power switch is connected with described first resistance, described SDI supply module realizes detecting voltage and the current signal inputted through SDI coaxial cable by the first resistance, described control module is the power switch to SDI supply module according to the voltage detected and current signal, power change-over switch is controlled.
In this utility model one embodiment, described SDI supply module also includes the first electric capacity, the second resistance, one end that described first resistance is connected with power switch is connected with the positive pole of video output terminal through described first electric capacity, the other end of the first resistance is connected with one end of described second resistance and is connected to the positive pole cable of described SDI coaxial cable, the other end of described second resistance is connected with the negative pole cable of SDI coaxial cable, the negative pole of the first power supply, the negative pole of second source, the negative pole of video output terminal, and described SDI coaxial cable is connected with video input apparatus.
In this utility model one embodiment, described video input apparatus is SDI pattern camera, the positive pole cable of described SDI coaxial cable inductance, electric capacity through SDI pattern camera respectively is connected with camera feeder ear, video output terminals, and the negative pole cable of described SDI coaxial cable is connected to the negative pole of SDI pattern camera.
In this utility model one embodiment, being connected also by a diode between described power switch and power change-over switch, and this diode cathode is connected with power change-over switch, diode cathode is connected with power switch.
In this utility model one embodiment, described power switch is controllable silicon.
In this utility model one embodiment, described first power source supplying voltage is 12V, and second source supply voltage is 5V.
Compared to prior art, this utility model has the advantages that
1, this utility model can be used in existing engineered, and existing more supervision control engineering uses the mode of operation of analog video, does not the most adapt to existing monitoring needs；Employing this utility model can be under conditions of not changing existing engineering construction and layout, current monitoring performance of directly upgrading；
2, this utility model can reduce the wiring of video monitoring simultaneously, it is possible to use a coaxial cable can realize camera and power and the signal transmission of audio frequency and video, improves reliability and the placement-and-routing of simplified system of system work；
3, autgmentability of the present utility model is very strong, including the power supply that can also carry out power supply in existing SMI communication.
Accompanying drawing explanation
Fig. 1 is the block diagram of the electric supply installation of this utility model SDI pattern.
Fig. 2 is that the electric supply installation voltage bias of this utility model SDI pattern is powered rough schematic view.
Fig. 3 is the signal schematic representation after the electric supply installation voltage bias of this utility model SDI pattern.
Fig. 4-1 is to detect after this utility model device starts that SDI powers the working method schematic diagram of camera.
Fig. 4-2 is signal to be detected after this utility model device starts but is not that SDI powers the working method schematic diagram of camera.
Fig. 4-3 is electric current to be detected after this utility model device starts but does not has the working method schematic diagram of sdi signal.
Fig. 5 is the process working method schematic diagram after this utility model real time on-line monitoring malfunction.
Detailed description of the invention
Below in conjunction with the accompanying drawings, the technical solution of the utility model is specifically described.
The electric supply installation of a kind of SDI pattern of the present utility model, including control module and the SDI supply module that is connected with this control module, described SDI supply module includes power switch, power change-over switch, first power supply, second source and the first resistance, one end of described power switch through described power change-over switch respectively with the first power supply, second source connects, the other end of described power switch is connected with described first resistance, described SDI supply module realizes detecting voltage and the current signal inputted through SDI coaxial cable by the first resistance, described control module is the power switch to SDI supply module according to the voltage detected and current signal, power change-over switch is controlled.
Described SDI supply module also includes the first electric capacity, the second resistance, one end that described first resistance is connected with power switch is connected with the positive pole of video output terminal through described first electric capacity, the other end of the first resistance is connected with one end of described second resistance and is connected to the positive pole cable of described SDI coaxial cable, the other end of described second resistance is connected with the negative pole cable of SDI coaxial cable, the negative pole of the first power supply, the negative pole of second source, the negative pole of video output terminal, and described SDI coaxial cable is connected with video input apparatus.
Being connected also by a diode between described power switch and power change-over switch, and this diode cathode is connected with power change-over switch, diode cathode is connected with power switch.Described power switch is controllable silicon.Described first power source supplying voltage is 12V, and second source supply voltage is 5V.
Described video input apparatus is SDI pattern camera (or general camera, analogue camera etc.), the positive pole cable of described SDI coaxial cable inductance, electric capacity through SDI pattern camera respectively is connected with camera feeder ear, video output terminals, and the negative pole cable of described SDI coaxial cable is connected to the negative pole of SDI pattern camera.
Technical solutions of the utility model are told about below by way of specific embodiment.
As shown in Figure 1, the electric supply installation of a kind of SDI pattern of the present utility model, including control module and the SDI supply module that is connected with this control module, SDI supply module includes resistance R1, R2, electric capacity C1, C2, inductance L, IGBT pipe, diode D, on and off switch S, battery BT1, battery BT2.
After coaxial cable connects above (after i.e. the feeder ear of camera, video output terminals connect D point, C point respectively), control module automatic 1s timing sends the pulse width signal of 100ms (i.e. by the battery BT2 of 3 grades of connection 5V, control IGBT pipe timing 100ms to turn off), the selection of pattern it is operated by the way of detection electric current automatically and signal, as Fig. 4-1 once detects electric current, it is detected simultaneously by video signal, then it is assumed that system is the mode of operation utilizing SDI to power；Video signal only detected such as Fig. 4-2 when system, be not detected by current signal value, then automatic decision is general camera, and system is operated according to the mode of general camera, and back-end system can not be powered to front end；If as Fig. 4-3 detects electric current, but video signal can not be detected, then system is not HD video SDI form, but analogue camera standard.
As Fig. 1 can be 10m Ω by resistance R1() monitoring supply voltage and electric current judge the internal resistance parameter value of current system, Switching power switch S is from 2 gears (i.e. disconnection battery BT2, connection battery BT1) of 3 gears of 5V to 12V simultaneously, carries out 12V and powers.The current parameters value simultaneously utilizing acquisition analyzes the power grade of camera, and utilizes the mode of current limliting that circuit is carried out power control.
The video signal of C point input on the right side of Fig. 2, i.e. Fig. 3 is 1., it is then the 2. composite signal of Fig. 3 at the B point of Fig. 2 after electric capacity C2 superimposed voltage, after electric capacity C1, arrive Fig. 2 left side A point signal be restored to Fig. 3 1., the B point signal of Fig. 2 arrives the signal 3. that D point waveform is Fig. 3 of Fig. 2 through inductance L, voltage pulsation amplitude reduction, utilizes the power supply chip of Width funtion can carry out voltage conversion in camera circuitry, does not interferes with power supply.
As shown in Figure 5, in the work process of system, the feeder ear of system monitoring voltage always and electric current, once the electric current of system changes, short circuit or off state occur, the controllable silicon (IGBT pipe) of system is then at 100us time internal cutting off power supply, and 1s recovers above-mentioned SDI original operating state, the state of real-time monitoring system.
It is above preferred embodiment of the present utility model, all changes made according to technical solutions of the utility model, when produced function is without departing from the scope of technical solutions of the utility model, belong to protection domain of the present utility model.
Claims (6)
1. the electric supply installation of a SDI pattern, it is characterized in that: include control module and the SDI supply module being connected with this control module, described SDI supply module includes power switch, power change-over switch, first power supply, second source and the first resistance, one end of described power switch through described power change-over switch respectively with the first power supply, second source connects, the other end of described power switch is connected with described first resistance, described SDI supply module realizes detecting voltage and the current signal inputted through SDI coaxial cable by the first resistance, described control module is the power switch to SDI supply module according to the voltage detected and current signal, power change-over switch is controlled.
The electric supply installation of SDI pattern the most according to claim 1, it is characterized in that: described SDI supply module also includes the first electric capacity, second resistance, one end that described first resistance is connected with power switch is connected with the positive pole of video output terminal through described first electric capacity, the other end of the first resistance is connected with one end of described second resistance and is connected to the positive pole cable of described SDI coaxial cable, the other end of described second resistance and the negative pole cable of SDI coaxial cable, the negative pole of the first power supply, the negative pole of second source, the negative pole of video output terminal connects, described SDI coaxial cable is connected with video input apparatus.
The electric supply installation of SDI pattern the most according to claim 2, it is characterized in that: described video input apparatus is SDI pattern camera, the positive pole cable of described SDI coaxial cable inductance, electric capacity through SDI pattern camera respectively is connected with camera feeder ear, video output terminals, and the negative pole cable of described SDI coaxial cable is connected to the negative pole of SDI pattern camera.
4. according to the electric supply installation of the SDI pattern described in claims 1 to 3 any one, it is characterized in that: be connected also by a diode between described power switch and power change-over switch, and this diode cathode is connected with power change-over switch, diode cathode is connected with power switch.
5. according to the electric supply installation of the SDI pattern described in claims 1 to 3 any one, it is characterised in that: described power switch is controllable silicon.
6. according to the electric supply installation of the SDI pattern described in claims 1 to 3 any one, it is characterised in that: described first power source supplying voltage is 12V, and second source supply voltage is 5V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620098332.2U CN205545672U (en) | 2016-02-01 | 2016-02-01 | Power supply unit of SDI mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620098332.2U CN205545672U (en) | 2016-02-01 | 2016-02-01 | Power supply unit of SDI mode |
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| CN205545672U true CN205545672U (en) | 2016-08-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105657228A (en) * | 2016-02-01 | 2016-06-08 | 福建福光股份有限公司 | Power supply system of SDI (Serial Digital Interface) mode and power supply method |
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2016
- 2016-02-01 CN CN201620098332.2U patent/CN205545672U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105657228A (en) * | 2016-02-01 | 2016-06-08 | 福建福光股份有限公司 | Power supply system of SDI (Serial Digital Interface) mode and power supply method |
| CN105657228B (en) * | 2016-02-01 | 2017-12-22 | 福建福光股份有限公司 | The electric power system and method for supplying power to of SDI patterns |
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