CN211505684U - Power failure detection alarm circuit for power consumption equipment - Google Patents
Power failure detection alarm circuit for power consumption equipment Download PDFInfo
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Abstract
一种用电设备掉电检测报警电路，包括二极管D1，二极管D1阳极接直流电源正极，二极管D1阴极接用电设备正极，用电设备负极接三极管基极，三极管发射极接直流电源负极，三极管集电极接电阻R1一端、555定时器4脚，电阻R1另一端接红色发光二极管阳极、555定时器8脚、电源VCC端；红色发光二极管阴极端接电阻R2一端，电阻R2另一端接555定时器7脚、电阻R3一端，电阻R3另一端接555定时器2脚、6脚和电容C1一端，电容C1另一端接GND端和电容C2一端，电容C2另一端接555定时器5脚，555定时器1脚接GND端，555定时器3脚接电阻R4一端，电阻R4另一端接蜂鸣器一端、电源VCC端，蜂鸣器另一端接GND端；本实用新型具有成本低、线路结构简单、线路稳定性高等优点。
A power failure detection and alarm circuit for electrical equipment comprises a diode D1, the anode of the diode D1 is connected to the positive electrode of the DC power supply, the cathode of the diode D1 is connected to the positive electrode of the electrical equipment, the negative electrode of the electrical equipment is connected to the base of the triode, the emitter of the transistor is connected to the negative electrode of the DC power supply, and the triode is connected to the negative electrode of the DC power supply. The collector is connected to one end of the resistor R1, the 4 pin of the 555 timer, the other end of the resistor R1 is connected to the anode of the red LED, the 8 pin of the 555 timer, and the VCC terminal of the power supply; the cathode of the red LED is connected to one end of the resistor R2, and the other end of the resistor R2 is connected to the 555 timer 7 pin of the device, one end of resistor R3, the other end of resistor R3 is connected to 555 timer pin 2, 6 pin and one end of capacitor C1, the other end of capacitor C1 is connected to GND end and one end of capacitor C2, the other end of capacitor C2 is connected to 555 timer pin 5, 555 The 1 pin of the timer is connected to the GND end, the 3 pin of the 555 timer is connected to one end of the resistor R4, the other end of the resistor R4 is connected to one end of the buzzer, the VCC end of the power supply, and the other end of the buzzer is connected to the GND end; the utility model has the advantages of low cost and circuit structure. Simple, high line stability advantages.
Description
技术领域technical field
本实用新型属于用电设备掉电控制技术领域，具体涉及一种用电设备掉电检测报警电路。The utility model belongs to the technical field of power-down control of electrical equipment, in particular to a power-down detection and alarm circuit for electrical equipment.
背景技术Background technique
随着现代通讯和工业技术的发展，对设备工作的可靠性要求越来越高，用电设备掉电应能检测到掉电信息，以便操作人员采取一系列应对工作。现有的用电设备掉电检测报警电路通常是检测市电部分，但是市电部分掉电概率较小，相对应更多的是AC转DC的直流电源部分因为电源适配器损坏或接线端接线不牢固等原因，使得直流电源端停止电源输出，从而引起用电设备停止工作。目前相关的用电设备检测电路有的是通过电压监控芯片、微控制器等控制芯片进行设计的，虽然具有检测精度高等，但是系统电路复杂，成本较高；还有的是通过继电器进行掉电检测报警，虽然具有成本低等优点，但是检测速度慢，且继电器体积较大占用PCB板空间。With the development of modern communication and industrial technology, the reliability of equipment operation is getting higher and higher, and the power failure information of electric equipment should be detected, so that operators can take a series of countermeasures. The existing power failure detection and alarm circuit of electrical equipment usually detects the mains part, but the probability of power failure in the mains part is small. Correspondingly, it is more for the DC power supply part of AC to DC because the power adapter is damaged or the terminal wiring is incorrect. For reasons such as firmness, the DC power supply end stops the power output, thereby causing the electrical equipment to stop working. At present, some of the relevant electrical equipment detection circuits are designed by control chips such as voltage monitoring chips and microcontrollers. Although they have high detection accuracy, the system circuit is complex and the cost is high; some are powered by relays. It has the advantages of low cost, but the detection speed is slow, and the size of the relay is large and occupies the PCB board space.
发明内容SUMMARY OF THE INVENTION
为了克服上述现有技术的缺点，本实用新型的目的在于提供一种用电设备掉电检测报警电路，采用555定时器芯片进行掉电检测报警设计，具有成本低、线路结构简单、线路稳定性高等优点。In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the present utility model is to provide a power-down detection and alarm circuit for electrical equipment, which adopts a 555 timer chip for power-down detection and alarm design, and has the advantages of low cost, simple circuit structure, and circuit stability. high advantage.
为了达到上述目的，本实用新型采取的技术方案为：In order to achieve the above purpose, the technical scheme adopted by the present utility model is:
一种用电设备掉电检测报警电路，包括二极管D1，二极管D1的阳极端连接直流电源的正极端，二极管D1的阴极端连接用电设备的正极端，用电设备的负极端连接三极管Q1的基极端，三极管Q1的发射极端连接直流电源的负极端，三极管Q1的集电极端连接电阻R1的一端、555定时器的4脚端，电阻R1的另一端连接红色发光二极管L1的阳极端、555定时器的8脚端、电源VCC端；A power-down detection and alarm circuit for electrical equipment includes a diode D1, the anode end of the diode D1 is connected to the positive terminal of a DC power supply, the cathode terminal of the diode D1 is connected to the positive terminal of the electrical equipment, and the negative terminal of the electrical equipment is connected to the transistor Q1. The base terminal, the emitter terminal of the transistor Q1 is connected to the negative terminal of the DC power supply, the collector terminal of the transistor Q1 is connected to one end of the resistor R1, the 4-pin terminal of the 555 timer, and the other end of the resistor R1 is connected to the red light-emitting diode L1 The anode terminal, 555 The 8-pin end of the timer, the power supply VCC end;
红色发光二极管L1的阴极端连接电阻R2的一端，电阻R2的另一端连接555定时器的7脚端、电阻R3的一端，电阻R3的另一端连接555定时器的2脚、6脚端和电容C1的一端，电容C1的另一端连接GND端和电容C2的一端，电容C2的另一端连接555定时器的5脚端，555定时器的1脚端连接GND端，555定时器的3脚端连接电阻R4的一端，电阻R4的另一端连接蜂鸣器LS1的一端、电源VCC端，蜂鸣器LS1的另一端连接GND端。The cathode end of the red light-emitting diode L1 is connected to one end of the resistor R2, the other end of the resistor R2 is connected to the 7-pin end of the 555 timer and one end of the resistor R3, and the other end of the resistor R3 is connected to the 555 timer. One end of C1, the other end of capacitor C1 is connected to GND and one end of capacitor C2, the other end of capacitor C2 is connected to the 5-pin end of the 555 timer, the 1-pin end of the 555 timer is connected to the GND end, and the 3-pin end of the 555 timer One end of the resistor R4 is connected, the other end of the resistor R4 is connected to one end of the buzzer LS1 and the power supply VCC terminal, and the other end of the buzzer LS1 is connected to the GND terminal.
所述的直流电源的输出电压为24V，VCC端输出电压为12V。The output voltage of the DC power supply is 24V, and the output voltage of the VCC terminal is 12V.
所述的三极管Q1为直插型NPN三极管，型号为2SA1013。The triode Q1 is an in-line NPN triode, and the model is 2SA1013.
所述的电容C1为贴片钽电容，电容为100uF；电容C2为瓷片电容，电容为0.01uF。The capacitor C1 is a chip tantalum capacitor with a capacitance of 100uF; the capacitor C2 is a ceramic chip capacitor with a capacitance of 0.01uF.
所述的电阻R1、电阻R2、电阻R3、电阻R4的参数分别为：The parameters of the resistor R1, resistor R2, resistor R3 and resistor R4 are:
100KΩ、1kΩ、10KΩ、1KΩ。100KΩ, 1kΩ, 10KΩ, 1KΩ.
本实用新型的有益效果：The beneficial effects of the present utility model:
1、通过555定时器完成用电设备掉电检测和报警设计，检测简单，可靠性高。1. Complete the power failure detection and alarm design of electrical equipment through the 555 timer, which is simple in detection and high in reliability.
2、通过低成本的声光报警方式进行掉电指示(用电设备正常工作时，红色发光二极管保持常亮状态，用电设备掉电时，红色发光二极管闪烁，蜂鸣器鸣响报警)，便于用户及时的了解用电设备工作情况。2. Power down indication through low-cost sound and light alarm (when the electrical equipment is working normally, the red light-emitting diode remains on, and when the electrical equipment is powered off, the red light-emitting diode flashes, and the buzzer sounds for alarm), It is convenient for users to know the working conditions of electrical equipment in a timely manner.
3、电路简单，可靠性高，造价成本低。3. Simple circuit, high reliability and low cost.
附图说明Description of drawings
图1为本实用新型的示意图。Fig. 1 is the schematic diagram of the utility model.
图2为用电设备正常工作时的电流流向示意图。FIG. 2 is a schematic diagram of the current flow when the electrical equipment is working normally.
图3为用电设备发生掉电事故时，555定时器工作的瞬间电流流向示意图。Figure 3 is a schematic diagram of the instantaneous current flow when the 555 timer works when a power failure accident occurs in the electrical equipment.
图4为555定时器工作时2脚端和3脚端电压波形变化示意图。Figure 4 is a schematic diagram of the voltage waveform changes at the 2-pin terminal and the 3-pin terminal when the 555 timer is working.
具体实施方式Detailed ways
下面结合附图和实施例对本实用新型进一步说明The utility model will be further described below in conjunction with the accompanying drawings and embodiments
参照图1，一种用电设备掉电检测报警电路，包括二极管D1，二极管D1的阳极端连接直流电源的正极端，二极管D1的阴极端连接用电设备的正极端，用电设备的负极端连接三极管Q1的基极端，三极管Q1的发射极端连接直流电源的负极端，三极管Q1的集电极端连接电阻R1的一端、555定时器的4脚端，电阻R1的另一端连接红色发光二极管L1的阳极端、555定时器的8脚端、电源VCC端；Referring to FIG. 1, a power failure detection and alarm circuit of an electrical equipment includes a diode D1, the anode of the diode D1 is connected to the positive terminal of the DC power supply, the cathode terminal of the diode D1 is connected to the positive terminal of the electrical equipment, and the negative terminal of the electrical equipment is connected. Connect the base terminal of the transistor Q1, the emitter terminal of the transistor Q1 is connected to the negative terminal of the DC power supply, the collector terminal of the transistor Q1 is connected to one end of the resistor R1, the 4-pin end of the 555 timer, and the other end of the resistor R1 is connected to the red light-emitting diode L1. Anode end, 8-pin end of 555 timer, power supply VCC end;
红色发光二极管L1的阴极端连接电阻R2的一端，电阻R2的另一端连接555定时器的7脚端、电阻R3的一端，电阻R3的另一端连接555定时器的2脚、6脚端和电容C1的一端，电容C1的另一端连接GND端和电容C2的一端，电容C2的另一端连接555定时器的5脚端，555定时器的1脚端连接GND端，555定时器的3脚端连接电阻R4的一端，电阻R4的另一端连接蜂鸣器LS1的一端、电源VCC端，蜂鸣器LS1的另一端连接GND端。The cathode end of the red light-emitting diode L1 is connected to one end of the resistor R2, the other end of the resistor R2 is connected to the 7-pin end of the 555 timer and one end of the resistor R3, and the other end of the resistor R3 is connected to the 555 timer. One end of C1, the other end of capacitor C1 is connected to GND and one end of capacitor C2, the other end of capacitor C2 is connected to the 5-pin end of the 555 timer, the 1-pin end of the 555 timer is connected to the GND end, and the 3-pin end of the 555 timer One end of the resistor R4 is connected, the other end of the resistor R4 is connected to one end of the buzzer LS1 and the power supply VCC terminal, and the other end of the buzzer LS1 is connected to the GND terminal.
所述的直流电源的输出电压为24V，VCC端输出电压为12V。The output voltage of the DC power supply is 24V, and the output voltage of the VCC terminal is 12V.
所述的三极管Q1为直插型NPN三极管，型号为2SA1013。The triode Q1 is an in-line NPN triode, and the model is 2SA1013.
所述的电容C1为贴片钽电容，电容为100uF；电容C2为瓷片电容，电容为0.01uF。The capacitor C1 is a chip tantalum capacitor with a capacitance of 100uF; the capacitor C2 is a ceramic chip capacitor with a capacitance of 0.01uF.
所述的电阻R1、电阻R2、电阻R3、电阻R4的参数分别为：100KΩ、1kΩ、10KΩ、1KΩ。The parameters of the resistor R1, the resistor R2, the resistor R3, and the resistor R4 are: 100KΩ, 1kΩ, 10KΩ, and 1KΩ, respectively.
本实用新型的工作原理为：The working principle of the utility model is:
如图1、图2所示，当用电设备两端电压正常输入时(直流电源供电正常)，三极管Q1基极端有电流流过，由于三极管Q1的基极端电压与发射极端电压大差大于0.7V，从而使得三极管Q1导通，进而使得555定时器4脚端为低电平状态(此时4脚端电压大约为0.3V左右)，555定时器处于复位状态，555定时器3脚保持低电平状态，不进行输出。此时直流电源端电流从正极端流经二极管D1、用电设备、三极管Q1后流入直流电源负极端，此时用电设备正常工作。VCC电源端一路电流从红色发光二极管L1流经电阻R2、555定时器7脚端(放电端)、555定时器1脚端(GND端)后流入电源GND端。此时红色发光二极管L1因为有电流流过，保持常亮状态。另一路电流从电阻R1端流经三极管Q1后流入GND端。As shown in Figure 1 and Figure 2, when the voltage at both ends of the electrical equipment is input normally (the DC power supply is normal), there is current flowing through the base terminal of the transistor Q1, because the voltage difference between the base terminal and the emitter terminal of the transistor Q1 is greater than 0.7V , so that the transistor Q1 is turned on, and then the 555
如图1、图3，当用电设备发生掉电事故时，此时，三极管Q1基极端没有电流流过，三极管Q1处于关闭状态，进而使得555定时器4脚端为高电平状态(此时4脚端电压为12V)，555定时器进行正常工作，由电阻R2、电阻R3、电容C1组成的RC电路进行充放电工作，使得555定时器3脚端进行一定占空比的高低电平输出。相关工作原理如图4所示，以一个工作周期进行说明：As shown in Figure 1 and Figure 3, when a power failure accident occurs in the electrical equipment, at this time, no current flows through the base terminal of the transistor Q1, and the transistor Q1 is in a closed state, which makes the 555
(1)由于RC电路充电作用，使得555定时器6脚端电压大于2/3Vcc,2脚端电压大于1/3Vcc,此时555定时器3脚端输出高电平；(1) Due to the charging effect of the RC circuit, the voltage at the 6-pin terminal of the 555 timer is greater than 2/3Vcc, and the voltage at the 2-pin terminal is greater than 1/3Vcc. At this time, the 3-pin terminal of the 555 timer outputs a high level;
(2)随着电容C1放电，6脚端电压开始小于2/3Vcc，2脚端电压大于1/3Vcc，此时555定时器3脚端继续保持高电平输出；(2) With the discharge of capacitor C1, the voltage of
(3)随着电容C1继续放电，6脚端电压小于2/3Vcc，2脚端电压开始小于1/3Vcc，此时555定时器3脚端发生电平转换，进行低电平输出。(3) As the capacitor C1 continues to discharge, the voltage at the 6-pin terminal is less than 2/3Vcc, and the 2-pin terminal voltage begins to be less than 1/3Vcc. At this time, the 3-pin terminal of the 555 timer undergoes level conversion and low-level output.
由于555定时器3脚端进行一定占空比的高低电平输出，此时红色发光二极管L1以一定的频率进行闪烁，蜂鸣器LS1以一定的频率进行鸣响，从而提醒用户发生了用电设备掉电事故，以便于用户进行掉电事故排查。Because the 3-pin terminal of the 555 timer performs a high and low level output with a certain duty cycle, the red light-emitting diode L1 flashes at a certain frequency, and the buzzer LS1 sounds at a certain frequency, thereby reminding the user that electricity consumption has occurred. Equipment power failure, so that users can troubleshoot power failure.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115234962A (en) * | 2022-05-27 | 2022-10-25 | 浙江中广电器集团股份有限公司 | Power failure protection system of air source heat pump heating unit and control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115234962A (en) * | 2022-05-27 | 2022-10-25 | 浙江中广电器集团股份有限公司 | Power failure protection system of air source heat pump heating unit and control method thereof |
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