技术领域technical field
本实用新型涉及监控领域，特别涉及一种监控摄像头定时检测电路。The utility model relates to the monitoring field, in particular to a monitoring camera timing detection circuit.
背景技术Background technique
摄像头(CAMERA或WEBCAM)又称为电脑相机、电脑眼、电子眼等，是一种视频输入设备，被广泛的运用于视频会议，远程医疗及实时监控等方面。普通的人也可以彼此通过摄像头在网络进行有影像、有声音的交谈和沟通。另外，人们还可以将其用于当前各种流行的数码影像，影音处理。Camera (CAMERA or WEBCAM), also known as computer camera, computer eye, electronic eye, etc., is a video input device that is widely used in video conferencing, telemedicine and real-time monitoring. Ordinary people can also talk and communicate with each other through the network with images and sounds through the camera. In addition, people can also use it for various popular digital images and audio-visual processing.
摄像头在实际使用中可能为因为各种外界或自身因素导致其出现故障，无法使用，监控摄像头故障主要分为三个方面：电源故障、摄像头连接线路故障、摄像头设备故障。In actual use, the camera may fail due to various external or internal factors and cannot be used. Surveillance camera failures are mainly divided into three aspects: power failure, camera connection line failure, and camera equipment failure.
一、监控摄像机电源引起摄像头设备故障。1. The power supply of the surveillance camera causes the camera equipment to fail.
电源的问题大致有以下几种可能：供电线路或供电电压不正确、功率不够（或某一路供电线路的线径不够，降压过大等）、供电系统的传输线路出现短路、断路、瞬间过压等，都会导致摄像头损坏。The problems of the power supply generally have the following possibilities: the power supply line or the power supply voltage is incorrect, the power is not enough (or the wire diameter of a certain power supply line is not enough, the voltage drop is too large, etc.), the transmission line of the power supply system is short-circuited, open circuit, instantaneous Pressure, etc., will cause damage to the camera.
二、摄像头设备线路连接原因2. The reason for the connection of the camera equipment line
由于某些设备(如带三可变镜头的摄像机及云台)的连结有很多条，若处理不好，特别是与设备相接的线路处理不好，就会出现断路、短路、线间绝缘不良、误接线等导致设备的损坏、性能下降的问题。Since there are many connections of some equipment (such as cameras with three variable lenses and pan/tilts), if the handling is not good, especially the lines connected to the equipment are not well handled, there will be open circuit, short circuit, and insulation between lines. Defective, miswiring and other problems that lead to equipment damage and performance degradation.
三、摄像头设备或不见本身的质量问题3. The camera equipment may not see its own quality problems
从理论上说，各种设备和部件都有可能发生质量问题。但从经验上看，纯属产品本身的质量问题，多发生在解码器、电动云台、传输部件等设备上。Theoretically speaking, quality problems may occur in various equipment and components. But from experience, it is purely a quality problem of the product itself, which mostly occurs on decoders, electric pan/tilts, transmission components and other equipment.
总而言之，摄像头无法正常工作主要在电源出现问题和摄像头信号输出线没有信号输出。All in all, the main reason that the camera cannot work normally is that there is a problem with the power supply and there is no signal output from the camera signal output line.
实用新型内容Utility model content
本实用新型的目的在于提供一种监控摄像头定时检测电路，具有能够定时对摄像头是否正常工作进行检测的效果。The purpose of the utility model is to provide a monitoring camera timing detection circuit, which can regularly detect whether the camera is working normally.
本实用新型的上述目的是通过以下技术方案得以实现的：The above-mentioned purpose of the utility model is achieved through the following technical solutions:
一种监控摄像头定时检测电路，包括A monitoring camera timing detection circuit, comprising
定时电路，所述定时电路阶段性输出持续一段时间的工作信号；a timing circuit, the timing circuit periodically outputs a working signal that lasts for a period of time;
电源检测电路，响应于工作信号得电工作，用于检测摄像头是否接入电源，当检测到摄像头正常接入电源时，所述电源检测电路输出电源信号；The power detection circuit is powered to work in response to the working signal, and is used to detect whether the camera is connected to the power supply. When it is detected that the camera is normally connected to the power supply, the power detection circuit outputs a power signal;
信号检测电路，响应于工作信号得电工作，用于检测摄像头是否有信号输出，当检测到摄像头有信号输出时，所述信号检测电路输出正常信号；The signal detection circuit is powered to work in response to the working signal, and is used to detect whether the camera has a signal output. When it is detected that the camera has a signal output, the signal detection circuit outputs a normal signal;
与非门电路，所述与非门电路的输入端耦接电源检测电路和信号检测电路，当不同时接收到电源信号和正常信号时，所述与非门电路输出高电平信号；A NAND gate circuit, the input end of the NAND gate circuit is coupled to the power detection circuit and the signal detection circuit, and when the power supply signal and the normal signal are not received at the same time, the NAND gate circuit outputs a high-level signal;
报警电路，所述报警电路耦接于与非门电路的输出端，并响应于高电平信号工作并输出报警信号；An alarm circuit, the alarm circuit is coupled to the output end of the NAND gate circuit, and responds to a high-level signal to work and output an alarm signal;
所述电源检测电路和信号检测电路响应于报警信号一直处于工作状态。The power detection circuit and the signal detection circuit are always in working state in response to the alarm signal.
通过采用上述技术方案，定时电路阶段性输出持续一段时间的工作信号，且电源检测电路和信号检测电路均响应于该工作信号工作，从而起到定时检测的作用，电源检测电路用于检测摄像头的供电单元是否稳定，当供电电源正常接入时，该电源检测电路输出电源信号，信号检测电路用于检测摄像头是否有信号输出，摄像头一般输出模拟信号进行数据传输，而该信号检测电路从中截取信号，当检测到摄像头正常输出时，该信号检测电路输出正常信号，或非门电路的输入端耦接电源检测电路和信号检测电路，且当同时接受到电源信号和正常信号时，表示电源端和摄像头的信号输出端均正常工作，此时，或非门电路由于输入端均为高电平信号，则其输出低电平信号，当其一输入端为低电平信号时，该或非门输入端输出高电平信号，报警电路响应于高电平信号报警已提醒工作人员监控摄像头出现问题需要采取措施，此时，该电源检测电路和信号检测电路响应于报警信号一直处于工作状态。By adopting the above technical solution, the timing circuit periodically outputs a working signal that lasts for a period of time, and both the power detection circuit and the signal detection circuit work in response to the working signal, thus playing the role of timing detection. The power detection circuit is used to detect the camera. Whether the power supply unit is stable. When the power supply is connected normally, the power detection circuit outputs a power signal. The signal detection circuit is used to detect whether the camera has a signal output. The camera generally outputs an analog signal for data transmission, and the signal detection circuit intercepts the signal , when the normal output of the camera is detected, the signal detection circuit outputs a normal signal, and the input end of the NOR gate circuit is coupled to the power detection circuit and the signal detection circuit, and when the power signal and the normal signal are received at the same time, it indicates that the power terminal and The signal output terminals of the camera are all working normally. At this time, because the input terminals of the NOR gate circuit are all high-level signals, it outputs a low-level signal. When one of its input terminals is a low-level signal, the NOR gate circuit The input terminal outputs a high-level signal, and the alarm circuit responds to the high-level signal alarm and has reminded the staff to take measures when there is a problem with the surveillance camera. At this time, the power detection circuit and signal detection circuit are always in a working state in response to the alarm signal.
作为本实用新型的改进，所述定时电路为555定时芯片和第一继电器构成的单稳态电路，所述第一继电器包括第一继电器线圈和第一继电器常开触点，所述555定时芯片的输出端耦接一第一继电器线圈，所述第一继电器常开触点接入所述电源检测电路和信号检测电路的供电端。As an improvement of the utility model, the timing circuit is a monostable circuit composed of a 555 timing chip and a first relay, the first relay includes a first relay coil and a normally open contact of the first relay, and the 555 timing chip The output end of the first relay is coupled to a first relay coil, and the normally open contact of the first relay is connected to the power supply end of the power detection circuit and the signal detection circuit.
通过采用上述技术方案，555定时器成本低，性能可靠，只需要外接几个电阻、电容，就可以实现多谐振荡器、单稳态触发器及施密特触发器等脉冲产生与变换电路，所以作为优选，并在555定时芯片的输出端耦接一继电器，通过该继电器的常开触点来控制电源检测电路和信号检测电路的工作状态。By adopting the above technical solution, the 555 timer has low cost and reliable performance. It only needs to connect a few resistors and capacitors to realize pulse generation and conversion circuits such as multivibrator, monostable trigger and Schmitt trigger. Therefore, as a preference, a relay is coupled to the output terminal of the 555 timing chip, and the working states of the power detection circuit and the signal detection circuit are controlled through the normally open contact of the relay.
作为本实用新型的改进，所述电源检测电路包括并联在摄像头电源两端的检测负载，和用于探测检测负载的电流互感器以及串接于电流互感器的检测电阻。As an improvement of the present invention, the power detection circuit includes a detection load connected in parallel at both ends of the power supply of the camera, a current transformer for detecting the detection load, and a detection resistor connected in series with the current transformer.
通过采用上述技术方案，检测负载与摄像头并联设置，使检测负载能够检测摄像头两端是否有电流通过，采用电流互感器来检测检测负载的电流，并通过检测电阻把电流互感器采集到的电流转换为电压，从而输出至与非门的输入端。By adopting the above technical solution, the detection load and the camera are set in parallel, so that the detection load can detect whether there is current passing through both ends of the camera, and the current transformer is used to detect the current of the detection load, and the current collected by the current transformer is converted through the detection resistor As a voltage, it is output to the input terminal of the NAND gate.
作为本实用新型的改进，所述检测负载设置为发光二极管。As an improvement of the utility model, the detection load is set as a light emitting diode.
通过采用上述技术方案，采用发光二极管作为检测负载，在具有检测特性的同时，该发光二极管还能够发光以警示人们电源位置正常工作。By adopting the above-mentioned technical solution, the light-emitting diode is used as the detection load. While having detection characteristics, the light-emitting diode can also emit light to warn people that the power supply is working normally.
作为本实用新型的改进，所述发光二极管串联设置一保护电阻。As an improvement of the utility model, a protection resistor is arranged in series with the light emitting diode.
通过采用上述技术方案，保护电阻用于保护发光二极管，防止摄像头的工作电压高于发光二极管太多导致发光二极管烧损，所以通过设置保护电阻起到分压保护作用。By adopting the above technical solution, the protection resistor is used to protect the light-emitting diode, preventing the camera from burning out due to the working voltage of the camera being too much higher than that of the light-emitting diode, so the setting of the protection resistor plays a role of voltage division protection.
作为本实用新型的改进，所述信号检测电路包括As an improvement of the utility model, the signal detection circuit includes
采样单元，所述采样单元接入摄像头的信号输出端，用于采集摄像头的输出信号以输出采样电压；A sampling unit, the sampling unit is connected to the signal output terminal of the camera, and is used to collect the output signal of the camera to output the sampling voltage;
放大单元，耦接于所述采样单元，用于将采样电压按一定比例放大，所述放大单元的输出端耦接所述与非门电路。The amplifying unit is coupled to the sampling unit, and is used to amplify the sampling voltage by a certain ratio, and the output terminal of the amplifying unit is coupled to the NAND gate circuit.
通过采用上述技术方案，采用单元接入摄像头的信号输出端，并输出采样电压，放大单元用于放大该采样电压，由于摄像头在输出模拟信号时，其电压过小，为了方便后续的检测，所以加了放大单元。By adopting the above technical solution, the adopting unit is connected to the signal output terminal of the camera, and outputs the sampling voltage, and the amplifying unit is used to amplify the sampling voltage. Since the voltage of the camera is too small when outputting the analog signal, in order to facilitate subsequent detection, the Amplifying unit is added.
作为本实用新型的改进，所述放大电路包括运算放大器，所述运算放大器的反向输入端接入所述摄像头的信号输出端，其同向输入端接地，其输出端耦接于与非门电路，所述运算放大器的输出端串接一第一电阻与运算放大器的反向输入端连接。As an improvement of the utility model, the amplifying circuit includes an operational amplifier, the inverting input terminal of the operational amplifier is connected to the signal output terminal of the camera, the same input terminal is grounded, and the output terminal is coupled to the NAND gate In the circuit, the output terminal of the operational amplifier is connected in series with a first resistor and connected to the inverting input terminal of the operational amplifier.
通过采用上述技术方案，采用常用的运算放大器作为放大电路，具有能够稳定放大一定倍数的作用，准确度高，灵敏性强。By adopting the above-mentioned technical solution and using a commonly used operational amplifier as an amplifying circuit, it has the function of stably amplifying a certain multiple, with high accuracy and strong sensitivity.
作为本实用新型的改进，所述运算放大器的反向输入端设置有用于对采样电压滤波的滤波单元。As an improvement of the utility model, the inverting input end of the operational amplifier is provided with a filtering unit for filtering the sampling voltage.
通过采用上述技术方案，第二电阻主要起到限流作用，防止电流过大损坏运算放大器。By adopting the above technical solution, the second resistor mainly functions as a current limiter to prevent damage to the operational amplifier due to excessive current.
作为本实用新型的改进，所述报警电路包括NPN三极管、蜂鸣器以及第二继电器，其中，As an improvement of the utility model, the alarm circuit includes an NPN triode, a buzzer and a second relay, wherein,
第二继电器包括第二继电器线圈和第二继电器常开触点，素数蜂鸣器与所述第二继电器线圈并联设置，所述NPN三极管的基极耦接于与非门电路的输出端，集电极耦接于电源，发射极耦接并联设置的蜂鸣器和第二继电器线圈并联的节点，所述第二继电器常开触点与所述第一继电器敞开触点并联设置。The second relay includes a second relay coil and a second relay normally open contact, a prime number buzzer is arranged in parallel with the second relay coil, the base of the NPN transistor is coupled to the output end of the NAND gate circuit, and the set The electrodes are coupled to the power supply, and the emitter is coupled to the node where the buzzer and the coil of the second relay are connected in parallel, and the normally open contact of the second relay is arranged in parallel with the open contact of the first relay.
通过采用上述技术方案，NPN三极管此处作为开关元器件，当其基极接收到高电平信号时，该NPN三极管导通，从而使并联设置的蜂鸣器和第二继电器线圈工作，蜂鸣器发出声音报警，并且第二继电器常开触点闭合，形成自锁电路，使电源检测电路和信号检测电路一直处于得电状态。By adopting the above-mentioned technical scheme, the NPN triode here is used as a switching component. When its base receives a high-level signal, the NPN triode is turned on, so that the parallel-connected buzzer and the second relay coil work, and the buzzer The device sends out a sound alarm, and the normally open contact of the second relay is closed to form a self-locking circuit, so that the power detection circuit and signal detection circuit are always in the energized state.
综上所述，本实用新型具有以下有益效果：通过采用上述技术方案，定时电路阶段性输出持续一段时间的工作信号，且电源检测电路和信号检测电路均响应于该工作信号工作，从而起到定时检测的作用，电源检测电路用于检测摄像头的供电单元是否稳定，当供电电源正常接入时，该电源检测电路输出电源信号，信号检测电路用于检测摄像头是否有信号输出，摄像头一般输出模拟信号进行数据传输，而该信号检测电路从中截取信号，当检测到摄像头正常输出时，该信号检测电路输出正常信号，或非门电路的输入端耦接电源检测电路和信号 电路，且当同时接受到电源信号和正常信号时，表示电源端和摄像头的信号输出端均正常工作，此时，或非门电路由于输入端均为高电平信号，则其输出低电平信号，当其一输入端为低电平信号时，该或非门输入端输出高电平信号，报警电路响应于高电平信号报警已提醒工作人员监控摄像头出现问题需要采取措施。In summary, the utility model has the following beneficial effects: by adopting the above technical solution, the timing circuit periodically outputs a working signal that lasts for a period of time, and both the power supply detection circuit and the signal detection circuit work in response to the working signal, thereby playing a role The function of timing detection. The power detection circuit is used to detect whether the power supply unit of the camera is stable. When the power supply is connected normally, the power detection circuit outputs the power signal. The signal detection circuit is used to detect whether the camera has signal output. The camera generally outputs analog The signal is used for data transmission, and the signal detection circuit intercepts the signal from it. When the normal output of the camera is detected, the signal detection circuit outputs a normal signal, and the input terminal of the NOR gate circuit is coupled to the power detection circuit and the signal circuit. When the power supply signal and normal signal are received, it means that the power supply terminal and the signal output terminal of the camera are working normally. When the terminal is a low-level signal, the NOR gate input terminal outputs a high-level signal, and the alarm circuit responds to the high-level signal alarm to remind the staff that there is a problem with the surveillance camera and needs to take measures.
附图说明Description of drawings
图1是监控摄像头接线电路图。Figure 1 is a wiring diagram of the surveillance camera.
图中，1、电源检测电路；11、电流互感器；2、放大单元；3、报警电路；4、定时电路。In the figure, 1. Power detection circuit; 11. Current transformer; 2. Amplifying unit; 3. Alarm circuit; 4. Timing circuit.
具体实施方式detailed description
以下结合附图对本实用新型作进一步详细说明。Below in conjunction with accompanying drawing, the utility model is described in further detail.
参照图1所示，一种监控摄像头定时检测电路，包括定时电路4、电源检测电路1、信号检测电路、与非门电路D2以及报警电路3，其中，定时电路是采用555定时芯片接成的单稳态电路，当定时电路处于工作状态时，使555的输出由低变成高电平，使第一继电器线圈K1处于工作状态，则第一继电器常开触点K1闭合及所谓的输出工作信号，从而使源检测电路和信号检测电路工作，同时，555第7脚内部截止，电源便通过R6给C2充电，这就是定时的开始，当电容C2上电压上升至电源电压的2/3时，555第7脚通道使C2放电，使第3脚输出由高电平变回到低电平，第一继电器线圈K1释放，不在输出工作信号，则源检测电路和信号检测电路断电，该定时长短由R6、C2决定。Referring to Fig. 1, a monitoring camera timing detection circuit includes a timing circuit 4, a power detection circuit 1, a signal detection circuit, a NAND gate circuit D2 and an alarm circuit 3, wherein the timing circuit is formed by using a 555 timing chip Monostable circuit, when the timing circuit is in working state, the output of 555 is changed from low to high level, so that the first relay coil K1 is in working state, then the first relay normally open contact K1 is closed and the so-called output works signal, so that the source detection circuit and the signal detection circuit work. At the same time, the 7th pin of 555 is internally cut off, and the power supply charges C2 through R6. This is the beginning of timing. When the voltage on capacitor C2 rises to 2/3 of the power supply voltage , 555 The 7th pin channel discharges C2, so that the 3rd pin output changes from high level to low level, the first relay coil K1 is released, and the working signal is not output, then the source detection circuit and signal detection circuit are powered off, the Timing length is determined by R6 and C2.
正常情况下监控摄像头一般的工作电压在24V属于直流电，众所周知，直流电具有正负之分，而电源检测电路包括检测负载、电流互感器11以及检测电阻R3，其中检测负载设置为发光二极管LED并在发光二极管LED串联一保护电阻R2，可以想象的到的是二极管LED只是其中一个实施例，并不局限于发光二极管LED，其他可以在直流电环境下工作的用电设备也可以，该检测负载串接在摄像头供电端的正负两端，也就是说与监控摄像头并联设置，那么如果监控摄像头无法工作并且检测负载也无法工作那么表示电路出现故障，此时，电源检测电路1不在输出信号，而检测方式是采用电流互感器11作为检测元件，因为在一些特定的情况下检测负载的两端会存在有电位，但是并没有电流通过，没有电流通过变表示摄像头或检测负载无法正常工作，电流互感器11采集到感应电流之后通过检测电阻R3把该感应电流转换为电压信号输出，当检测到检测负载正常工作时，电源检测单元输出高电平信号及所谓的电源信号，当没有检测到电流信号时，该电源检测单元不在输出电源信号，及所谓的低电平。Under normal circumstances, the general operating voltage of the surveillance camera is DC at 24V. As we all know, DC has positive and negative points, and the power detection circuit includes a detection load, a current transformer 11 and a detection resistor R3, wherein the detection load is set as a light-emitting diode LED and A light-emitting diode LED is connected in series with a protective resistor R2. It is conceivable that the diode LED is just one example, and it is not limited to the light-emitting diode LED. Other electrical equipment that can work in a DC environment can also be used. The detection load is connected in series At the positive and negative ends of the camera power supply end, that is to say, it is set in parallel with the surveillance camera. If the surveillance camera cannot work and the detection load cannot work, it means that the circuit is faulty. At this time, the power supply detection circuit 1 is not outputting signals, and the detection method The current transformer 11 is used as the detection element, because in some specific cases, there will be a potential at both ends of the detection load, but no current passes through, and no current passes through, indicating that the camera or the detection load cannot work normally. The current transformer 11 After the induction current is collected, the induction current is converted into a voltage signal output through the detection resistor R3. When the detection load is detected to be working normally, the power detection unit outputs a high-level signal and the so-called power signal. When no current signal is detected, The power detection unit is not outputting the power signal, and the so-called low level.
值得说的是，在上述的另一个实施例中，在发光二极管的接线位置串联设置一保护电阻R2，通过该保护电阻R2对流经发光二极管LED的的电压进行分压，从而防止电压较大以损坏发光二极管LED，具有保护发光二极管LED的作用。It is worth mentioning that, in another embodiment above, a protection resistor R2 is arranged in series at the connection position of the light emitting diode, and the voltage flowing through the light emitting diode LED is divided by the protection resistor R2, so as to prevent the voltage from being too large to Damage to the light-emitting diode LED has the function of protecting the light-emitting diode LED.
信号检测电路，该信号检测电路包括采样单元、放大单元2以及滤波单元，其中，采样单元通过导线接入摄像头的信号输出端，用于截取摄像头输出的信号V1，输出采样电压V1，现有的摄像头所述处的信号为模拟信号，当采样单元截取到信号时，连接一限流电阻R4，以防止电流过大导致放大单元的元器件损坏，同时，滤波单元包括滤波电容C1和滤波电感L1，用于对采样电压进行滤波，值得一提的是，滤波不仅仅局限于这种滤波方式;放大单元是由运算放大器D2作为核心元件组成的放大单元，但不局限于这种方式，放大单元用于对采样电压进行放大以满足后续的检测需要，当信号检测电路检测到摄像头输出电流时，输出高电平信号，反之则输出低电平信号。A signal detection circuit, the signal detection circuit includes a sampling unit, an amplifying unit 2 and a filtering unit, wherein the sampling unit is connected to the signal output terminal of the camera through a wire, and is used to intercept the signal V1 output by the camera, and output the sampling voltage V1. The signal at the position of the camera is an analog signal. When the sampling unit intercepts the signal, a current limiting resistor R4 is connected to prevent the components of the amplification unit from being damaged due to excessive current. At the same time, the filter unit includes a filter capacitor C1 and a filter inductor L1 , used to filter the sampling voltage. It is worth mentioning that the filtering is not limited to this filtering method; the amplifying unit is an amplifying unit composed of the operational amplifier D2 as the core component, but it is not limited to this method. The amplifying unit It is used to amplify the sampling voltage to meet the subsequent detection needs. When the signal detection circuit detects the output current of the camera, it outputs a high-level signal, otherwise it outputs a low-level signal.
上述的电源检测电路1和信号检测电路均响应于工作信号得电工作。Both the power detection circuit 1 and the signal detection circuit described above are energized to work in response to the working signal.
与非门电路D1对，利用自身的特性，当输入端均为高电平时输出低电平，当输入端其一为低电平时输出高电平，所以当监控摄像头出现问题时，与非门电路输出高电平信号。The pair of NAND gate circuit D1, using its own characteristics, outputs low level when both input terminals are high level, and outputs high level when one of the input terminals is low level, so when there is a problem with the surveillance camera, the NAND gate The circuit outputs a high level signal.
报警电路，该包括电路保护NPN三极管，该NPN三极管的基极耦接于与非门电路的输出端。其集电极耦接于电源，其发射极耦接一蜂鸣器和第二继电器线圈K2并联的节点，此处的NPN三极管作为开关元器件用，当其基极接收到高电平信号时，蜂鸣器发出声音，从而起到报警警示作用，同时，第二继电器常开触点K2闭合形成自锁电路，从而使源检测电路和信号检测电路一直处于工作状态。The alarm circuit includes a circuit protection NPN transistor, and the base of the NPN transistor is coupled to the output terminal of the NAND circuit. Its collector is coupled to the power supply, and its emitter is coupled to a node where a buzzer and the second relay coil K2 are connected in parallel. The NPN transistor here is used as a switching element. When its base receives a high-level signal, The buzzer emits a sound, which acts as an alarm. At the same time, the normally open contact K2 of the second relay is closed to form a self-locking circuit, so that the source detection circuit and the signal detection circuit are always in the working state.
值得说明的是，该报警电路的应用环境可以是摄像头现场、也可以是远方的总控中心等。It is worth noting that the application environment of the alarm circuit can be the scene of the camera, or the remote master control center, etc.
本具体实施例仅仅是对本实用新型的解释，其并不是对本实用新型的限制，本领域技术人员在阅读完本说明书后可以根据需要对本实施例做出没有创造性贡献的修改，但只要在本实用新型的权利要求范围内都受到专利法的保护。This specific embodiment is only an explanation of the utility model, and it is not a limitation of the utility model. After reading this description, those skilled in the art can make modifications to the embodiment without creative contribution according to needs, but as long as it is within the utility model All new claims are protected by patent law.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621265240.5UCN206517538U (en) | 2016-11-21 | 2016-11-21 | A kind of monitoring camera timely checking circuit |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621265240.5UCN206517538U (en) | 2016-11-21 | 2016-11-21 | A kind of monitoring camera timely checking circuit |
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|---|---|
| CN206517538Utrue CN206517538U (en) | 2017-09-22 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621265240.5UExpired - Fee RelatedCN206517538U (en) | 2016-11-21 | 2016-11-21 | A kind of monitoring camera timely checking circuit |
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| CN110294429A (en)* | 2019-06-22 | 2019-10-01 | 武汉宏宇建设工程咨询有限公司 | A kind of tower crane stabilization of equipment performance analysis system |
| CN114001874A (en)* | 2021-09-30 | 2022-02-01 | 苏州浪潮智能科技有限公司 | Liquid cooling device, liquid leakage detection method and liquid leakage detection circuit thereof |
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110294429A (en)* | 2019-06-22 | 2019-10-01 | 武汉宏宇建设工程咨询有限公司 | A kind of tower crane stabilization of equipment performance analysis system |
| CN114001874A (en)* | 2021-09-30 | 2022-02-01 | 苏州浪潮智能科技有限公司 | Liquid cooling device, liquid leakage detection method and liquid leakage detection circuit thereof |
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