WO2014026508A1 - 一种摄像机 - Google Patents

一种摄像机 Download PDF

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Publication number
WO2014026508A1
WO2014026508A1 PCT/CN2013/078039 CN2013078039W WO2014026508A1 WO 2014026508 A1 WO2014026508 A1 WO 2014026508A1 CN 2013078039 W CN2013078039 W CN 2013078039W WO 2014026508 A1 WO2014026508 A1 WO 2014026508A1
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WIPO (PCT)
Prior art keywords
logic circuit
control logic
main system
temperature
temperature sensor
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PCT/CN2013/078039
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English (en)
French (fr)
Inventor
盛华
孙一飞
Original Assignee
浙江宇视科技有限公司
Priority date (The priority date 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 date listed.)
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Application filed by 浙江宇视科技有限公司 filed Critical 浙江宇视科技有限公司
Priority to US14/390,014 priority Critical patent/US9307145B2/en
Publication of WO2014026508A1 publication Critical patent/WO2014026508A1/zh

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Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00Details of cameras or camera bodies; Accessories therefor
    • G03B17/55Details of cameras or camera bodies; Accessories therefor with provision for heating or cooling, e.g. in aircraft
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60Control of cameras or camera modules
    • H04N23/65Control of camera operation in relation to power supply
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01KMEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/16Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00Cameras or camera modules comprising electronic image sensors; Control thereof

Definitions

  • the present invention relates to a camera in the field of monitoring, and more particularly to a camera heating control technique.
  • BACKGROUND OF THE INVENTION Some components inside a surveillance camera cannot work reliably at low outdoor temperatures, such as an integrated movement, so a heating device is generally provided inside the camera.
  • the principle of the temperature jump switch control heating is as follows:
  • the automatic reset type sudden jump thermostat is to make the bimetal into a dish-shaped component, which is deformed by heat, causing a reverse kick, pushing the push rod to quickly break the contact, and breaking
  • the circuit is opened to achieve the purpose of controlling the disconnection of the heater; when the temperature is lowered, the bimetal jumps back to the original state, the contacts are closed, and the circuit is automatically turned on to achieve the purpose of turning on the heater.
  • This scheme is simple to implement, but the temperature of the heating control threshold cannot be set, which is mainly determined by the kick switch, and the snap switch has poor consistency and poor reliability.
  • the heating fan is not controllable and is in a normally open state.
  • the method of using the system software to control the heating is to obtain the temperature value of the temperature sensor in the system through the system software, and to control the opening and closing of the heating system according to a certain strategy, the software that can realize the heating opening temperature is configurable, but once the system software has problems, the whole The heating system will be confusing. In addition, at relatively low temperatures, the above two schemes may cause the system to fail to start or restart continuously at low temperatures.
  • the present invention provides a video camera including: a first temperature sensor, a control logic circuit, a main system, a heating module, a fan, and a power source; after the power is supplied, the first temperature sensor starts to operate; when the first temperature sensor senses When the temperature is less than ⁇ , the first temperature sensor outputs a control signal to the control logic circuit, so that the control logic circuit controls the heating module and the fan to be turned on and the control power source prohibits supplying power to the main system; when the temperature sensed by the first temperature sensor is greater than ⁇ , the first temperature sensor loses The control signal is sent to the control logic circuit such that the control logic circuit controls the power supply to supply power to the main system.
  • the device further includes a second temperature sensor, and the temperature sensed by the second temperature sensor is obtained after the main system is powered on, and when the temperature is greater than ⁇ less than T2, the main system outputs a control signal to the control logic circuit, so that the control logic circuit Control the heating module and the fan to work.
  • the heating module includes a first heating unit and a second heating unit.
  • the main system When the temperature sensed by the second temperature sensor obtained by the main system is less than T2 and greater than T3, the main system outputs a control signal to the control logic circuit, so that the control logic circuit controls The first heating unit and the fan are turned on; when the temperature sensed by the second temperature sensor obtained by the main system is less than T3 is greater than ⁇ , the main system outputs a control signal to the control logic circuit, so that the control logic circuit controls the first heating unit and the second heating unit. And the fan is turned on to work.
  • the first temperature sensor senses that the temperature is less than ⁇ , and outputs a control signal to the control logic circuit, so that the control logic circuit controls the heating module and the fan to be turned on, and the control power source is prohibited.
  • the main system is powered.
  • the first temperature sensor is connected to a temperature adjustment resistor, and the value of the temperature T1 is controlled by the resistance of the temperature adjustment resistor.
  • the device further includes a second temperature sensor, and the temperature sensed by the second temperature sensor is obtained after the main system is powered on, and when the temperature is greater than or equal to T2, the main system outputs a control signal to the control logic circuit, so that the control The logic circuit controls the heating module and the fan to turn on.
  • the heating module includes a first heating unit and a second heating unit.
  • the main system When the temperature sensed by the second temperature sensor obtained by the main system is less than or equal to T2 and greater than T3, the main system outputs a control signal to the control logic circuit, so that the control The logic circuit controls the first heating unit and the fan to be turned on, and controls the second heating unit not to be turned on; when the temperature sensed by the second temperature sensor obtained by the main system is less than or equal to T3 and greater than ⁇ , the main system outputs a control signal to the control logic circuit And causing the control logic circuit to control the first heating unit, the second heating unit, and the fan to be turned on.
  • the main system when the camera temperature is high and heat is required, the main system outputs a control signal to the control logic circuit, so that the control logic circuit drives the fan to turn on to dissipate the camera.
  • the first temperature sensor when the temperature sensed by the first temperature sensor is greater than ⁇ , the first temperature sensor outputs a control signal to the control logic circuit such that the control logic circuit temporarily disables the operation of the heating module and the fan.
  • FIG. 1 is a schematic diagram of a camera of the present invention.
  • DETAILED DESCRIPTION OF THE INVENTION The present invention controls the heating of a camera in a combination of hardware and software.
  • the heating module is first controlled by hardware for heating; after the camera rises to a certain temperature, the hardware can control the main system to operate. After the main system is powered on, the software in the main system takes over the hardware to control the heating module for heating.
  • Figure 1 is a schematic diagram of a camera of the present invention.
  • the camera includes: control logic circuit, temperature sensor 1, power supply, fan, heating module, main system (usually including CPU, memory, flash, etc.), switch, temperature sensor 2.
  • the heating control of the hardware part mainly includes a temperature sensor 1 and a control logic circuit.
  • the heating control of the software part mainly includes the temperature sensor 2, the main system and the control logic circuit.
  • the temperature sensor 1 senses the temperature, when the sensed temperature is less than ⁇ (such as -20 degrees), the temperature sensor 1 output control A signal (such as "logic 1") to the control logic that causes the control logic to control the heating module and the fan to turn on, while disabling the power supply to the main system.
  • such as -20 degrees
  • the temperature sensor 1 output control A signal (such as "logic 1") to the control logic that causes the control logic to control the heating module and the fan to turn on, while disabling the power supply to the main system.
  • such as -20 degrees
  • the temperature sensor 1 output control A signal (such as "logic 1") to the control logic that causes the control logic to control the heating module and the fan to turn on, while disabling the power supply to the main system.
  • the main system is difficult to ensure normal startup due to the sensitivity of some chips and even the camera's movement to the operating temperature. Heating module heating and fan blowing will cause the camera temperature to rise gradually.
  • the temperature sensor 1 When the temperature rises to ⁇ , when the temperature sensor 1 senses that the temperature is greater than ⁇ , the temperature sensor 1 outputs a control signal (such as "logic 0") to the control logic circuit, which causes the control logic circuit to control the power supply to supply power to the main system.
  • a control signal such as "logic 0"
  • the control logic circuit causes the control logic circuit to control the power supply to supply power to the main system.
  • there can be a switching device between the power supply and the main system, and the control signal output of the control logic circuit output output The opening/closing of the switch, to achieve the purpose of power supply to the main system or not, so that the main system starts working. This ensures that the main system can start normally at the right temperature at low temperatures, avoiding the inability to start after repeated system startup failures or repeated starts to seriously affect the life of the main system.
  • Temperature sensor 1 also known as a temperature switch, can output a control signal at a certain temperature.
  • the temperature sensor 1 is connected to a temperature adjustment resistor.
  • the resistance value is different, and the threshold temperature of the temperature sensor output control signal is also different.
  • the above temperature ⁇ the resistance of the corresponding resistor is R1; if the temperature ⁇ rises, the corresponding resistance value needs to be adjusted.
  • the main system After the heating control of the camera is performed by the main system, the main system obtains the temperature sensed by the temperature sensor 2 (for example, the temperature sensed by the main system timing reading temperature sensor 2), when the temperature is greater than ⁇ and less than or equal to T2 (such as ⁇ -20 degrees, T2 is 0 degrees), the main system outputs control signals (such as
  • the control logic again controls the heating module and the fan to turn on.
  • the heating module may comprise two independent heating units, which can further achieve green energy-saving hierarchical heating control: when the main system obtains the temperature sensor 2, the temperature sensed is less than or equal to T2 but greater than T3 (such as T2) When 0 degrees, T3 is 10 degrees), the main system outputs control signals (such as
  • the control logic circuit controls the first heating unit and the fan to be turned on; when the temperature sensor 2 obtained by the main system senses a temperature less than or equal to T3 is greater than ⁇ (if ⁇ is -20 degrees, T3 is - At 10 degrees), the main system outputs a control signal (such as "logic 10") to the control logic circuit, and the control logic circuit controls the first heating unit, the second heating unit, and the fan to be turned on; when the temperature sensor 2 obtained by the main system senses When the temperature is greater than T2 (such as 0 degrees), the main system outputs a control signal (such as "logic 00") to the control logic circuit, and the control logic circuit prohibits the heating of the first heating unit and the second heating unit.
  • a control signal such as "logic 10"
  • the main system controls the heating module to realize the heating control.
  • the heating control device is flexible.
  • the T2 and ⁇ 3 temperature values can be conveniently set, and only the corresponding software code can be changed.
  • the temperature sensor 2 can be connected to the CPU in the main system via I2C, and the CPU reads the temperature sensed by the temperature sensor 2 through the I2C. It can be seen that under the control of the software, with the temperature of the camera When the degree is increased, the heating force is continuously reduced until the heating is exited, and the whole process is green and energy-saving and can ensure the main system can operate normally.
  • the heating of the camera is controlled by the heating control software after the main system is started up.
  • the heating control software fails, the heating cannot be performed, and the temperature inside the camera will gradually decrease. When it falls below ⁇ , the main system may not work properly.
  • the temperature sensor 1 will output a control signal to the control logic circuit, so that the control logic circuit controls the heating module and the fan to turn on, and prohibits the power supply from supplying power to the main system.
  • the temperature sensor 1 outputs a control signal to the control logic circuit, and the control logic circuit causes the main system to be powered.
  • the heating control software is reloaded to start the work, and the camera's heating can be normally controlled.
  • control logic circuit can be built by discrete devices or by a single chip or a logic chip.
  • the control signals of temperature sensor 1 and the main system input control logic are specifically designed according to the specific implementation of the control logic.
  • the fan usually needs to be in the open state when the heating module is working. Firstly, the system is heated evenly to ensure that the local heating is not too high. Secondly, the heating module is evenly distributed and the heating module is protected. life span. In the case where the heating module is not operating, the main system can control the opening and closing of the fan based on the temperature sensed by the temperature sensor 2. For example, if the internal temperature of the camera is too high and heat dissipation is required, the main system can output a control signal to the control logic circuit, so that the control logic circuit drives the fan to turn on the heat dissipation function.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Aviation & Aerospace Engineering (AREA)
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Abstract

一种摄像机,包括:第一温度传感器、控制逻辑电路、主系统、加热模块、风扇和电源;电源供电后,第一温度传感器开始工作,当第一温度传感器感应到的温度小于T1时,第一温度传感器输出控制信号至控制逻辑电路,使得控制逻辑电路控制加热模块和风扇开启工作并且控制电源不给主系统供电,当第一温度传感器感应到的温度大于T1时,第一温度传感器输出控制信号至控制逻辑电路,使得控制逻辑电路控制电源给主系统供电并且控制加热模块和风扇不开启工作,保证了摄像机在低温条件下正常启动及稳定工作。

Description

一种摄像机
技术领域 本发明涉及监控领域的摄像机, 尤其涉及一种摄像机加热控制技术。 背景技术 监控摄像机内部一些器件在室外低温下不能可靠工作, 比如一体化机 芯, 所以一般会在摄像机内部设置加热装置。 业界普遍的控制加热的方式有 如下两种: 温度突跳开关控制加热和运用系统软件控制加热。 温度突跳开关 控制加热实现的原理如下: 自动复位型突跳温控器是将双金属片做成碟形元 件, 受热产生变形, 导致反向突跳, 推动推杆使触点迅速分断, 断开电路, 从而达到控制断开加热器的目的; 当降温后, 双金属片突跳恢复原状, 使触 点闭合, 自动接通电路达到打开加热器的目的。 这种方案实现简单, 但是加 热控制门限温度不可设置, 主要由突跳开关决定, 而突跳开关一致性差, 可 靠性差。 另外, 加热配套的风扇也不可控, 处于常开状态。 运用系统软件控 制加热的方法是通过系统软件获得系统内温度传感器的温度值, 根据一定的 策略控制加热系统的开启和关闭, 能实现加热开启温度的软件可配置, 但是 一旦系统软件出现问题, 整个加热系统就会混乱。 另, 在相当低的温度下, 上述两种方案可能导致系统在低温下无法正常启动或者不断重启。 发明内容 本发明提供一种摄像机, 该摄像机包括: 第一温度传感器、 控制逻辑电路、 主系统、 加热模块、 风扇和电源; 电源供电后, 第一温度传感器开始工作; 当 第一温度传感器感应到的温度小于 π时, 第一温度传感器输出控制信号至控制 逻辑电路, 使得控制逻辑电路控制加热模块和风扇开启工作并且控制电源禁止 向主系统供电; 当第一温度传感器感应到的温度大于 π时, 第一温度传感器输 出控制信号至控制逻辑电路, 使得控制逻辑电路控制电源给主系统供电。
优选地, 该装置还包括第二温度传感器, 主系统上电工作后获得第二温度传 感器感应的温度, 当该温度大于 Π小于 T2时, 主系统输出控制信号至控制逻 辑电路, 使得控制逻辑电路控制加热模块和风扇开启工作。
优选地, 所述加热模块包括第一加热单元和第二加热单元, 当主系统获得的 第二温度传感器感应的温度小于 T2大于 T3时, 主系统输出控制信号至控制逻 辑电路, 使得控制逻辑电路控制第一加热单元和风扇开启工作; 当主系统获得 的第二温度传感器感应的温度小于 T3大于 Π时, 主系统输出控制信号至控制 逻辑电路, 使得控制逻辑电路控制第一加热单元、 第二加热单元和风扇开启工 作。
优选地, 当主系统软件故障而无法控制加热模块工作时, 第一温度传感器感 应到温度小于 Π则输出控制信号至控制逻辑电路, 使得控制逻辑电路控制加热 模块和风扇开启工作, 并且控制电源禁止向主系统供电。 5、 如权利要求 1所述 的摄像机, 其特征在于, 所述第一温度传感器连接温度调节电阻, 所述温度 T1 的值由该温度调节电阻阻值来控制。
优选地, 该装置还包括第二温度传感器, 主系统上电工作后获得第二温度传 感器感应的温度, 当该温度大于 Π且小于等于 T2时, 主系统输出控制信号至 控制逻辑电路, 使得控制逻辑电路控制加热模块和风扇开启工作。
优选地, 所述加热模块包括第一加热单元和第二加热单元, 当主系统获得的 第二温度传感器感应的温度小于或等于 T2且大于 T3时, 主系统输出控制信号 至控制逻辑电路, 使得控制逻辑电路控制第一加热单元和风扇开启工作, 并控 制第二加热单元不开启; 当主系统获得的第二温度传感器感应的温度小于或等 于 T3且大于 Π时, 主系统输出控制信号至控制逻辑电路, 使得控制逻辑电路 控制第一加热单元、 第二加热单元和风扇开启工作。
优选地, 在摄像机温度较高需要散热时, 主系统输出控制信号至控制逻辑电 路, 使得控制逻辑电路驱动风扇开启以对摄像机进行散热。 优选地, 当第一温度传感器感应到的温度大于 π 时, 第一温度传感器输出 控制信号至控制逻辑电路, 使得控制逻辑电路暂时禁止加热模块和风扇工作。
相对于现有技术, 本发明能够解决低温下无法启动或者低温下启动可靠 性差的问题。 附图说明 图 1是本发明一种摄像机的原理图。 具体实施方式 本发明采用硬件和软件相结合的方式控制摄像机的加热。在一些极低温 度环境下, 首先由硬件来控制加热模块进行加热; 在摄像机上升到一定温度 后, 硬件可控制主系统上电工作。 在主系统上电工作后, 由主系统中的软件 接替硬件来控制加热模块进行加热。下面结合附图详细介绍本发明实施方式。
参见图 1, 图 1为本发明一种摄像机的原理图。 该摄像机包括: 控制逻 辑电路, 温度传感器 1, 电源, 风扇, 加热模块, 主系统 (通常包括 CPU、 内 存、 flash等在内的计算系统) , 开关, 温度传感器 2。 其中, 硬件部分的加 热控制主要包括温度传感器 1和控制逻辑电路。 软件部分的加热控制主要包 括温度传感器 2, 主系统和控制逻辑电路。 在相对极低的温度下, 仅有硬件 部分的加热控制装置进行工作: 电源上电后, 温度传感器 1感应温度, 当感 应到的温度小于 Π时 (比如 -20度), 温度传感器 1输出控制信号 (比如 "逻 辑 1 " )至控制逻辑电路, 这一信号会促使控制逻辑电路控制加热模块和风扇开 启工作, 同时禁止电源给主系统供电。 因为在极低的温度下, 主系统由于一些 芯片乃至摄像机的机芯对工作温度敏感等原因很难保证能正常启动进行工 作。加热模块加热和风扇吹动会使得摄像机温度逐歩升高。当温度升高到 Π后, 温度传感器 1感应到温度大于 Π时, 温度传感器 1输出控制信号 (比如 "逻辑 0" )至控制逻辑电路,这一信号会促使控制逻辑电路控制电源给主系统供电(比 如, 电源和主系统之间可以有一个开关器件, 控制逻辑电路输出的控制信号控 制开关的开启 /闭合, 达到电源给主系统供电与否的目的), 使主系统开始工作。 这就保证了低温时主系统能够在合适的温度正常启动, 避免系统启动失败后无 法启动或者反复多次启动严重影响主系统寿命的情况。
当主系统开始工作后, 摄像机进一歩的加热控制由软件部分实现, 所以当 温度升高到 π后, 温度传感器 1输出的控制信号使得控制逻辑电路暂时禁止加 热模块和风扇进行工作。 温度传感器 1, 也可以称作温度开关, 它能在一定的温 度下输出控制信号。 温度传感器 1 连接有一个温度调节电阻, 电阻值不同, 温 度传感器输出控制信号的阈值温度也不同。 比如上述温度 π, 对应该电阻的阻 值为 R1 ; 如果需要温度 Π上升, 那对应的电阻阻值也需要调整。
摄像机的加热控制交由主系统进行后,主系统会获得温度传感器 2感应的 温度 (比如主系统定时读取温度传感器 2感应的温度), 当该温度大于 Π且小 于或者等于 T2 (比如 Π为 -20度, T2为 0度) 时, 主系统输出控制信号 (比如
"逻辑 1 " )至控制逻辑电路,控制逻辑电路再次控制加热模块和风扇开启工作。 在一种优选的方式中, 加热模块可以包含两个独立的加热单元, 可以进一歩实 现绿色节能的分级的加热控制: 当主系统获得温度传感器 2 感应的温度小于或 等于 T2却大于 T3 (如 T2为 0度, T3为一 10度) 时, 主系统输出控制信号 (如
"逻辑 11 " ) 至控制逻辑电路, 控制逻辑电路控制第一加热单元和风扇开启工 作; 当主系统获得的温度传感器 2感应的温度小于或等于 T3大于 Π (如 Π为 -20度, T3为 -10度) 时, 主系统输出控制信号 (比如 "逻辑 10 " ) 至控制逻 辑电路, 控制逻辑电路控制第一加热单元、 第二加热单元和风扇开启工作; 当 主系统获得的温度感应器 2感应的温度大于 T2 (如 0度) 时, 主系统输出控制 信号 (如 "逻辑 00" ) 至控制逻辑电路, 控制逻辑电路禁止第一加热单元和第 二加热单元加热。 主系统控制加热模块实现加热控制相对于硬件部分的加热控 制装置实现灵活, 比如 T2、 Τ3温度值可以很方便的进行设置, 只需改动相应的 软件代码即可。 温度传感器 2可以通过 I2C与主系统中的 CPU连接, CPU通过 I2C读取温度传感器 2感应到的温度。 由此可见, 在软件控制下, 随着摄像机温 度的升高, 加热的力度不断降低直到退出加热, 整个过程绿色节能且可以保证 主系统能够正常运作。
如前所述, 在主系统启动工作后, 由加热控制软件来控制摄像机的加热。 在这个过程中, 如果加热控制软件出现故障, 加热无法进行, 将使得摄像机内 的温度逐渐降低。 当降到 Π以下时, 主系统可能就无法正常工作了。 但是当摄 像机内的温度在 Π以下时, 温度传感器 1将输出控制信号至控制逻辑电路, 使 控制逻辑电路控制加热模块和风扇开启工作, 同时禁止电源给主系统供电。 随 着摄像机内部的温度逐渐上升, 到达 π以上时, 温度传感器 1输出控制信号至 控制逻辑电路, 控制逻辑电路使得主系统接通电源。 在当前大于 π的温度下, 主系统接通电源后, 加热控制软件重新加载启动工作, 又能正常控制摄像机的 加热了。
上述控制逻辑电路可以有分立器件搭建, 也可以由单片机或者逻辑芯片实 现。 温度传感器 1 和主系统输入控制逻辑电路的控制信号根据控制逻辑电路的 具体实现来具体设计。
上述还有一点需要说明的, 风扇在加热模块工作时通常需要处于开启状态, 一来保证系统加热均匀, 确保不会出现局部加热过高的情况; 二来保证了加热 模块散热均匀, 保护加热模块工作寿命。 在加热模块不工作的情况下, 可以由 主系统根据温度传感器 2 感应的温度控制风扇的开启和关闭。 比如摄像机内部 温度过高, 需要散热, 则主系统可以输出控制信号至控制逻辑电路, 使得控制 逻辑电路驱动风扇开启达到散热的功能。
以上所述仅为本发明的较佳实施例而已, 并不用以限制本发明, 凡在本 发明的精神和原则之内, 所做的任何修改、 等同替换、 改进等, 均应包含在 本发明保护的范围之内。
以上所述仅为本发明的较佳实施例而已, 并不用以限制本发明, 凡在本 发明的精神和原则之内, 所做的任何修改、 等同替换、 改进等, 均应包含在 本发明保护的范围之内。

Claims

权利要求书
1、 一种摄像机, 其特征在于, 该摄像机包括: 第一温度传感器、 控制逻辑 电路、 主系统、 加热模块、 风扇和电源; 电源供电后, 第一温度传感器开始工 作; 当第一温度传感器感应到的温度小于 T1时, 第一温度传感器输出控制信号 至控制逻辑电路, 使得控制逻辑电路控制加热模块和风扇开启工作并且控制电 源禁止向主系统供电; 当第一温度传感器感应到的温度大于 T1时, 第一温度传 感器输出控制信号至控制逻辑电路, 使得控制逻辑电路控制电源给主系统供电。
2、 如权利要求 1 所述的摄像机, 其特征在于, 该装置还包括第二温度传感 器, 主系统上电工作后获得第二温度传感器感应的温度, 当该温度大于 T1小于 T2时, 主系统输出控制信号至控制逻辑电路, 使得控制逻辑电路控制加热模块 和风扇开启工作。
3、 如权利要求 2 所述的摄像机, 其特征在于, 所述加热模块包括第一加热 单元和第二加热单元, 当主系统获得的第二温度传感器感应的温度小于 T2大于 T3时, 主系统输出控制信号至控制逻辑电路, 使得控制逻辑电路控制第一加热 单元和风扇开启工作; 当主系统获得的第二温度传感器感应的温度小于 T3大于 T1 时, 主系统输出控制信号至控制逻辑电路, 使得控制逻辑电路控制第一加热 单元、 第二加热单元和风扇开启工作。
4、 如权利要求 2 所述的摄像机, 其特征在于, 当主系统软件故障而无法控 制加热模块工作时, 第一温度传感器感应到温度小于 T1则输出控制信号至控制 逻辑电路, 使得控制逻辑电路控制加热模块和风扇开启工作, 并且控制电源禁 止向主系统供电。
5、 如权利要求 1 所述的摄像机, 其特征在于, 所述第一温度传感器连接温 度调节电阻, 所述温度 T1的值由该温度调节电阻阻值来控制。
6、 如权利要求 1 所述的摄像机, 其特征在于, 该装置还包括第二温度传感 器, 主系统上电工作后获得第二温度传感器感应的温度, 当该温度大于 T1且小 于等于 T2时, 主系统输出控制信号至控制逻辑电路, 使得控制逻辑电路控制加 更正页 (细则第 91条) 热模块和风扇开启工作。
7、 如权利要求 6 所述的摄像机, 其特征在于, 所述加热模块包括第一加热 单元和第二加热单元, 当主系统获得的第二温度传感器感应的温度小于或等于 T2且大于 T3时, 主系统输出控制信号至控制逻辑电路, 使得控制逻辑电路控制 第一加热单元和风扇幵启工作, 并控制第二加热单元不幵启; 当主系统获得的 第二温度传感器感应的温度小于或等于 T3且大于 T1时, 主系统输出控制信号 至控制逻辑电路, 使得控制逻辑电路控制第一加热单元、 第二加热单元和风扇 开启工作。
8、 如权利要求 1 所述的摄像机, 其特征在于, 在摄像机温度较高需要散热 时, 主系统输出控制信号至控制逻辑电路, 使得控制逻辑电路驱动风扇开启以 对摄像机进行散热。
9、 如权利要求 1 所述的摄像机, 其特征在于, 当第一温度传感器感应到的 温度大于 T1时, 第一温度传感器输出控制信号至控制逻辑电路, 使得控制逻辑 电路暂时禁止加热模块和风扇工作。
8
更正页 (细则第 91条)
PCT/CN2013/078039 2012-08-16 2013-06-26 一种摄像机 WO2014026508A1 (zh)

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