CN202424658U - Synchronous resetting circuit for master control chip and video camera - Google Patents
Synchronous resetting circuit for master control chip and video camera Download PDFInfo
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- CN202424658U CN202424658U CN2011205608994U CN201120560899U CN202424658U CN 202424658 U CN202424658 U CN 202424658U CN 2011205608994 U CN2011205608994 U CN 2011205608994U CN 201120560899 U CN201120560899 U CN 201120560899U CN 202424658 U CN202424658 U CN 202424658U
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- video camera
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- control chip
- power
- master control
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Abstract
The utility model discloses a circuit capable of ensuring the synchronous resetting of a master control chip and a video camera. The circuit aims to solve the problem that the video camera is reset by voltage fluctuation and the master control chip still normally works, so that a video camera parameter in the master control chip is inconsistent with an actual video camera parameter, and the master control chip cannot correctly control the video camera to cause influence on a monitoring effect in the prior art. The synchronous resetting circuit for the master control chip and the video camera comprises a power input module, a power conversion module and a synchronous resetting module, wherein the power input module is used for supplying power to the video camera and the master control chip; the power conversion module is used for supplying the power to the master control chip; the synchronous resetting module is used for controlling the power conversion module; the power input module is connected with the video camera; the power conversion module is connected with the master control chip; and the synchronous resetting module is connected between the power input module and the power conversion module.
Description
Technical field
The utility model relates to field of video monitoring, the especially a kind of circuit that can guarantee that main control chip and video camera can synchronous resets.
Background technology
In field of video monitoring, may run into some unexpected states, make video camera that some exceptional reset actions take place, influence monitoring effect.For example run into power supply unit and occur unusually, supply power voltage is shaken, and the situation of supply current moment break-make can occur, and this situation can form very big test to the power supply of monopod video camera.And most monopod video camera all to be video camera and master control chip shared one tunnel input power supply; Because the video camera power consumption is bigger, but the situation that the master control chip (being the The Cloud Terrace main control unit) of The Cloud Terrace is still being worked the video camera outage just may appear in instant cut-off.Power up is normal behind instant cut-off; This moment, video camera can restart; Parameter after restarting reverts to default setting, but because the The Cloud Terrace main control unit does not restart, this has just caused, and stored parameters is different in the parameter in the video camera and the The Cloud Terrace main control unit.After this situation occurs; Can make main control chip make correct reaction to the video camera current states; Monitoring effect to the part occasion exerts an influence, and especially regulates in advance under the occasion of camera parameters when monitoring like night at special needs, can have a strong impact on the effect of monitoring.
The utility model content
The technical problem that the utility model will solve provides a kind of circuit that can guarantee main control chip and video camera synchronous reset; Be intended to solve in the prior art; The main control chip operate as normal still because voltage fluctuation causes video camera to reset; Thereby cause the camera parameters in the main control chip not to be inconsistent, cause main control chip incorrect, and then influence the problem of monitoring effect video camera control with actual camera parameters.
For addressing the above problem, a kind of main control chip of the utility model and video camera synchronous reset circuit comprise:
Be used for Power Entry Module to video camera and main control unit bulk supply;
Be used for power transfer module to the main control unit power supply;
Be used to control the synchronous reset module of said power transfer module;
Wherein said Power Entry Module links to each other with camara module; Power transfer module links to each other with main control unit; The synchronous reset module is connected between Power Entry Module and the power transfer module.
Said power transfer module is the power supply chip that has enable pin.
Said synchronous reset module comprises: two resistance; Wherein, a resistance in said two resistance is connected between the enable pin of power output end and power supply chip, and another resistance is connected between the enable pin and power supply ground of power supply chip.
Adopt the main control chip and the video camera synchronous reset circuit of the utility model structure; Can cause under the situation that video camera resets in voltage fluctuation; Guarantee that main control chip and video camera reset simultaneously; So that main control chip in time carries out necessary initialization operation to video camera, guaranteed the normal reliable of monitor video output.The main control chip of the utility model structure and video camera synchronous reset circuit have characteristics reasonable in design, simple in structure, widely used.
Description of drawings
Fig. 1 is the structured flowchart of the utility model main control chip and video camera synchronous reset circuit.
Fig. 2 is the circuit diagram of the utility model main control chip and video camera synchronous reset circuit.
Embodiment
In order to make those skilled in the art person understand the utility model technical scheme better, the utility model is done further to specify below in conjunction with accompanying drawing and execution mode.
As shown in Figure 1, main control chip of the utility model and video camera synchronous reset circuit comprise:
Be used for exchanging the Power Entry Module that 24V converts the direct current 12V that can supply master control system and video camera use to;
Be used for converting direct current 12V to the power transfer module of the employable direct current 5V of main control unit;
Be used to the synchronous reset module of guaranteeing that main control chip resets with video camera;
And main control unit and camara module;
Wherein said Power Entry Module links to each other with camara module; Power transfer module links to each other with main control unit; The synchronous reset module is connected between Power Entry Module and the power transfer module.
As shown in Figure 2, the power transfer module in the utility model is selected DC-DC chip MP2359 chip for use; This chip has enable pin, and the effective voltage of enable pin is 1.2V.
The DC 12V of process Power Entry Module output output inserts the voltage input end of video camera and MP2359 chip respectively, and the voltage output end output DC 5V of MP2359 chip inserts single-chip microcomputer.
In actual measurement, find; When the voltage of Power Entry Module output output is lower than 10V; Video camera can cut off the power supply, so be lower than 1.2V as long as guarantee the voltage of the enable pin of MP2359 chip when 10V, just can make the MP2359 chip be in off state; Can't export 5V, thereby single-chip microcomputer is also cut off the power supply.Recover just often and work as voltage, single-chip microcomputer and video camera will power on simultaneously, reach the effect of synchronous reset.
Realize above-mentioned requirement, the synchronous reset module comprises two resistance: R1 and R2; R1 is connected between the enable pin of Power Entry Module output and MP2359 chip, and R2 is connected between the enable pin and power supply ground of MP2359 chip.
Voltage divider principle according to resistance:
Uen=R2/ (R1+R2) * Uin ... ... formula one
Wherein: Uen is the voltage on the enable pin; Uin is the Power Entry Module output end voltage
Can derive through formula one and to draw:
R2=(Uen*R1)/(Uin-Uen) ... ... formula two
In formula two, get R1=100k Ω, Uin gets the shutoff threshold voltage 10V of video camera, and Uen gets the shutoff threshold voltage 1.2V of MP2359 chip.Calculate R2=13.636k Ω, the actual R2=13.7k Ω that gets.
R1, the R2 that draws numerical value through above formula constituted the synchronous reset circuit of MP2359 chip and video camera.Can guarantee that MP2359 also is in off state, no longer to single-chip microcomputer power supply is provided when the video camera power supply is lower than 10V.Thereby can guarantee when powering on once more that single-chip microcomputer and video camera reset simultaneously.
Claims (3)
1. main control chip and video camera synchronous reset circuit is characterized in that: comprising:
Be used for Power Entry Module to video camera and main control unit bulk supply;
Be used for power transfer module to the main control unit power supply;
Be used to control the synchronous reset module of said power transfer module;
Wherein said Power Entry Module links to each other with camara module; Power transfer module links to each other with main control unit; The synchronous reset module is connected between Power Entry Module and the power transfer module.
2. main control chip and video camera synchronous reset circuit according to claim 1, it is characterized in that: said power transfer module is the power supply chip that has enable pin.
3. like said main control chip of claim 2 and video camera synchronous reset circuit, it is characterized in that: said synchronous reset module comprises: two resistance; Wherein, a resistance in said two resistance is connected between the enable pin of power output end and power supply chip, and another resistance is connected between the enable pin and power supply ground of power supply chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205608994U CN202424658U (en) | 2011-12-28 | 2011-12-28 | Synchronous resetting circuit for master control chip and video camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205608994U CN202424658U (en) | 2011-12-28 | 2011-12-28 | Synchronous resetting circuit for master control chip and video camera |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202424658U true CN202424658U (en) | 2012-09-05 |
Family
ID=46749381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205608994U Expired - Fee Related CN202424658U (en) | 2011-12-28 | 2011-12-28 | Synchronous resetting circuit for master control chip and video camera |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202424658U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114461142A (en) * | 2022-01-07 | 2022-05-10 | 苏州浪潮智能科技有限公司 | Method, system, device and medium for reading and writing Flash data |
| CN115567761A (en) * | 2022-12-07 | 2023-01-03 | 杭州视洞科技有限公司 | Resetting method of infinite rotation camera and electronic equipment |
-
2011
- 2011-12-28 CN CN2011205608994U patent/CN202424658U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114461142A (en) * | 2022-01-07 | 2022-05-10 | 苏州浪潮智能科技有限公司 | Method, system, device and medium for reading and writing Flash data |
| CN114461142B (en) * | 2022-01-07 | 2023-08-08 | 苏州浪潮智能科技有限公司 | Method, system, device and medium for reading and writing Flash data |
| CN115567761A (en) * | 2022-12-07 | 2023-01-03 | 杭州视洞科技有限公司 | Resetting method of infinite rotation camera and electronic equipment |
| CN115567761B (en) * | 2022-12-07 | 2023-03-31 | 杭州视洞科技有限公司 | Resetting method of infinite rotation camera and 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: 20120905 Termination date: 20151228 |
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| EXPY | Termination of patent right or utility model |