Wireless audible and visual alarm

Abstract

The utility model provides a wireless audible and visual alarm, which comprises a communication circuit, a key circuit, a power supply module circuit, a storage circuit, an audible and visual alarm module circuit, a temperature and pressure sensor circuit and an MCU (Microprogrammed Control Unit) control circuit, the second end of the power supply module circuit is connected with the key circuit, the NBIoT communication circuit and the MCU control circuit; the MCU control circuit is further connected with the temperature and pressure sensor circuit, the storage circuit, the NBIoT communication circuit, the key circuit and the sound and light alarm module circuit. By arranging the NBIoT communication circuit, the networking function is added to the alarm, so that the alarm information can be seen on an external monitoring platform besides the field sound-light alarm information, the probability that the alarm information is missed is reduced, the field safety is improved, and the technical problems that the existing alarm equipment is lagged in alarm and single in alarm information are solved.

Description

Technical Field

[0001] The utility model belongs to the field of gas pipeline alarms and relates to an alarm circuit, in particular to a wireless sound and light alarm. Background Art

[0002] For gas companies, due to the dense and complex pipeline network and the large number of pipelines, many alarms are needed to build a gas network so that they can know at any time whether the detection data of a certain part of the pipeline is abnormal, which is convenient for gas companies to repair in time to ensure the safety of residents and other gas users. The alarms currently used do not have networking functions, and the alarm methods are limited. Therefore, it is urgent to design a wireless sound and light alarm with good timeliness, high accuracy and high safety. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a wireless sound and light alarm to solve the technical problems of the existing alarm equipment such as alarm lag and single alarm information.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A wireless sound and light alarm device comprises a communication circuit, a key circuit, a power module circuit, a storage circuit, a sound and light alarm module circuit, a temperature and pressure sensor circuit and an MCU control circuit, wherein a first end of the power module circuit is connected to the sound and light alarm module circuit, and a second end of the power module circuit is connected to the key circuit, the NBIoT communication circuit and the MCU control circuit; the MCU control circuit is also respectively connected to the temperature and pressure sensor circuit, the storage circuit, the NBIoT communication circuit, the key circuit and the sound and light alarm module circuit.

[0006] The utility model also includes the following technical features:

[0007] The temperature and pressure sensor circuit includes a resistor R9, a resistor R4, a capacitor C18, and a socket J9; wherein one end of the resistor R9 is connected to one end of the resistor R4, one end of the capacitor C18, pin 4 of the socket J9, and the MCU control circuit; the second end of the resistor R9 is connected to the MCU control circuit and pin 1 of the socket J9; the second end of the resistor R4 is connected to the MCU control circuit and pin 2 of the socket J9; the second end of the capacitor C18 is connected to pin 3 of the socket J9 and is grounded.

[0008] The storage circuit includes a storage chip U6, a resistor R7, a resistor R6, and a capacitor C15, wherein pins 1, 2, 3, and 4 of the storage chip U6 are connected to one end of the capacitor C15 and are grounded, the second end of the capacitor C15 is connected to one end of the resistor R7, one end of the resistor R6, pin 8 of the storage chip U6, and the MCU control circuit, the second end of the resistor R7 is connected to pin 6 of the storage chip U6 and the MCU control circuit, and the second end of R6 is connected to pin 5 of the storage chip U6 and the MCU control circuit.

[0009] The NBIoT communication circuit includes capacitor C3, capacitor C4, capacitor C5, capacitor C6, capacitor C12, module U3, SIM card U5, and antenna ANT1, wherein one end of capacitor C3 is connected to one end of capacitor C4, one end of capacitor C5, one end of capacitor C6, the first end of the power module circuit of pins 42 and 43 of module U3, the key circuit, and the MCU control circuit; the second end of capacitor C3 is connected to the second end of capacitor C4, the second end of capacitor C5, and the second end of capacitor C6 and is grounded; pin 1 of SIM card U5 is connected to capacitor C4, the first end of capacitor C5, and the second end of capacitor C6; One end of C12 is connected and grounded, the second end of capacitor C12 is connected to pin 8 of SIM card U5 and pin 14 of module U3, pins 3, 6 and 7 of SIM card U5 are connected to pins 11, 13 and 12 of module U3 respectively, and pins 2, 4 and 5 of SIM card U5 are all floating; pins 10, 27, 34, 36, 37, 40 and 41 of module U3 are all grounded, pins 15, 17 and 18 of module U3 are respectively connected to the MCU control circuit; pin 35 of module U3 is connected to ANT1.

[0010] The button circuit includes a button J2, a resistor R5, and a capacitor C16, wherein one end of the resistor R5 is connected to the first end of the power module circuit, the NBIoT communication circuit, and the MCU control circuit, the second end of the resistor R5 is connected to pin 1 of the button J2, one end of the capacitor C16, and the MCU control circuit, and the second end of the capacitor C16 is connected to pin 2 of the button J2 and is grounded.

[0011] The sound and light alarm module circuit includes a seat P1, a relay K1, a diode D3, a capacitor E2, a resistor R8, a resistor R10, a resistor R12, and a transistor Q2, wherein pin 1 and pin 2 of the seat P1 are respectively connected to pin 4 and pin 5 of the relay K1, pin 2 of the relay K1 is commonly connected to the positive electrode of the capacitor E2, one end of the resistor R8 and the negative electrode of the diode D3, the negative electrode of the capacitor E2 is grounded, the second end of the resistor R8 is connected to the power module circuit, the positive electrode of the diode D3 is commonly connected to pin 1 of the relay K1 and the collector of the transistor Q2, the base of the transistor Q2 is connected to one end of the resistor R10, the second end of the resistor R10 is connected to the MCU control circuit, the emitter of the transistor Q2 is connected to one end of the resistor R12, and the second end of the resistor R12 is grounded.

[0012] The power module circuit includes a socket J1, a diode D2, a diode D1, a capacitor C1, a capacitor C2, a capacitor C7, a capacitor E1, a power chip U1, and a power chip U2, wherein pin 1 of the socket J1 is grounded, pin 2 of the socket J1 is connected to the positive electrode of the diode D2, the negative electrode of the diode D2 is connected to pin 2 of the power chip U1, pin 1 of the power chip U1 is connected to one end of the capacitor C1, one end of the capacitor C2, pin 1 of the power chip U2, one end of the capacitor C7 and the negative electrode of the capacitor E1, pin 3 of the power chip U1 is connected to the second end of the capacitor C1, the positive electrode of the diode D1 and the sound and light alarm module circuit, the negative electrode of the diode D1 is connected to one end of the capacitor C2 and pin 2 of the power chip U2; pin 3 of the power chip U2 is connected to the second end of the capacitor C7, the positive electrode of the capacitor E1, the button circuit, the NBIoT communication circuit and the MCU control circuit.

[0013] Compared with the prior art, the utility model has the following beneficial technical effects:

[0014] (I) In the present invention, an NBIoT communication circuit is provided to increase the networking function in the alarm, so that in addition to the sound and light alarm information on site, the alarm information can also be seen on an external monitoring platform, thereby reducing the probability of alarm information being missed, increasing the safety of the site, and solving the technical problems of alarm lag and single alarm information of existing alarm equipment.

[0015] (II) By densely deploying alarms on site, the alarm location can be quickly determined through the monitoring platform so that emergencies can be dealt with in a timely manner, improving site safety. At the same time, it can monitor areas that are inconvenient for staff to inspect, thereby increasing personnel safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the circuit topology diagram of the utility model;

[0017] Figure 2 The MCU controller circuit in the utility model

[0018] Figure 3 It is the temperature and pressure sensor circuit in the utility model;

[0019] Figure 4 It is the storage circuit in the utility model;

[0020] Figure 5 It is the NBIoT communication circuit in the utility model;

[0021] Figure 6 It is the key circuit in the utility model;

[0022] Figure 7 The utility model is a sound and light alarm module circuit.

[0023] Figure 8 This is the power supply circuit in the utility model.

[0024] The specific contents of the utility model are further explained in detail below in conjunction with the embodiments. DETAILED DESCRIPTION

[0025] It should be noted that, unless otherwise specified, all components in the present invention are components known in the art.

[0026] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solution of the present application fall within the protection scope of the present invention.

[0027] The utility model provides a wireless sound and light alarm, comprising a communication circuit, a key circuit, a power module circuit, a storage circuit, a sound and light alarm module circuit, a temperature and pressure sensor circuit and an MCU control circuit. The first end of the power module circuit is connected to the sound and light alarm module circuit, and the second end of the power module circuit is connected to the key circuit, the NBIoT communication circuit and the MCU control circuit; the MCU control circuit is also respectively connected to the temperature and pressure sensor circuit, the storage circuit, the NBIoT communication circuit, the key circuit and the sound and light alarm module circuit.

[0028] In the above technical solution, by setting up an NBIoT communication circuit, a networking function is added to the alarm, so that in addition to the sound and light alarm information on site, the alarm information can also be seen on an external monitoring platform, reducing the probability of alarm information being missed, increasing the safety of the site, and solving the technical problems of alarm lag and single alarm information of existing alarm equipment.

[0029] In the above scheme, the MCU control circuit adopts the single-chip microcomputer U4 of model R7F0C908B2DFP and its peripheral circuit, and the peripheral circuit includes socket JP1, resistor R1, resistor R3, resistor R13, capacitor C8, capacitor C9, capacitor C10, capacitor C14 and crystal oscillator X1; wherein, pin 1 of socket JP1 is connected to pin 1 of single-chip microcomputer U4 and one end of resistor R3, the second end of resistor R3 is connected to pin 3 of socket JP1, pin 8 of single-chip microcomputer U4, one end of resistor R13 and pin 3 of power chip U2 of power module circuit, one end of resistor R5 of key circuit and capacitor C3 of NBIoT communication circuit. The two ends are connected together; Pin 2 of the socket JP1 is grounded, Pin 4 of the socket JP1 is connected to Pin 2 of the single-chip computer U4, the second end of the resistor R13 is connected to Pin 2 of the single-chip computer U4 and one end of the capacitor C14, and the second end of the capacitor C14 is grounded; Pin 4 of the single-chip computer U4 is connected to one end of the resistor R1, the second end of the resistor R1 is connected together to one end of the crystal oscillator X1 and one end of the capacitor C8, the second end of the capacitor C8 is connected together to one end of the capacitor C9 and one end of the capacitor C10 and is grounded; the second end of the capacitor C9 is connected together to the second end of the crystal oscillator X1 and Pin 5 of the single-chip computer U4, the second end of the capacitor C10 is connected to Pin 6 of the single-chip computer U4, and Pin 7 of the single-chip computer U4 is grounded.

[0030] Preferably, the value of capacitor C8 is 22pF, the value of capacitor C9 is 22pF, the value of capacitor C10 is 100uF, the value of capacitor C14 is 100uF, the value of resistor R1 is 1K, the value of resistor R3 is 1K, and the value of resistor R13 is 10K.

[0031] The MCU control circuit is used to receive the temperature data and pressure data transmitted by the temperature and pressure sensor circuit, and transmit it to the NBIoT communication circuit, and trigger the sound and light alarm module circuit when the value of the temperature data or the pressure data exceeds the normal value.

[0032] The temperature and pressure sensor circuit includes a resistor R9, a resistor R4, a capacitor C18, and a socket J9; wherein, one end of the resistor R9 is connected to one end of the resistor R4, one end of the capacitor C18, pin 4 of the socket J9, and the MCU control circuit; the second end of the resistor R9 is connected to the MCU control circuit and pin 1 of the socket J9; the second end of the resistor R4 is connected to the MCU control circuit and pin 2 of the socket J9; the second end of the capacitor C18 is connected to pin 3 of the socket J9 and is grounded.

[0033] In the above technical solution, the temperature and pressure sensor circuit is used to collect temperature data and pressure data of the gas pipeline and transmit them to the MCU control circuit.

[0034] Among them, one end of the resistor R9 is connected to one end of the resistor R4, one end of the capacitor C18, pin 4 of the socket J9 and pin 11 of the microcontroller U4 of the MCU control circuit; the second end of the resistor R9 is connected to pin 10 of the microcontroller U4 of the MCU control circuit and pin 1 of the socket J9; the second end of the resistor R4 is connected to pin 9 of the microcontroller U4 of the MCU control circuit and pin 2 of the socket J9.

[0035] Preferably, the value of the resistor R9 is 10K, the value of the resistor R4 is 10K, the value of the capacitor C18 is 100nF and the model of the socket J9 is 5264-4A.

[0036] The storage circuit includes a storage chip U6, a resistor R7, a resistor R6, and a capacitor C15, wherein pins 1, 2, 3, and 4 of the storage chip U6 are connected to one end of the capacitor C15 and are grounded, the second end of the capacitor C15 is connected to one end of the resistor R7, one end of the resistor R6, pin 8 of the storage chip U6, and the MCU control circuit, the second end of the resistor R7 is connected to pin 6 of the storage chip U6 and the MCU control circuit, and the second end of R6 is connected to pin 5 of the storage chip U6 and the MCU control circuit.

[0037] The storage circuit is used to store alarm information and temperature data and pressure data collected by the temperature and pressure sensors; wherein the storage chip U6 is connected to the MCU control circuit via the IIC bus to store and read data.

[0038] Among them, the second end of capacitor C15 is connected to one end of resistor R7, one end of resistor R6, pin 8 of storage chip U6 and pin 18 of single-chip microcomputer U4 of MCU control circuit, the second end of resistor R7 is connected to pin 6 of storage chip U6 and pin 19 of single-chip microcomputer U4 of MCU control circuit, and the second end of R6 is connected to pin 5 of storage chip U6 and pin 20 of single-chip microcomputer U4 of MCU control circuit.

[0039] Preferably, the value of the resistor R6 is 10K, the value of the resistor R7 is 10K, the value of the capacitor C15 is 100nF, and the model of the storage chip U6 is AT24C1024.

[0040] The NBIoT communication circuit includes capacitor C3, capacitor C4, capacitor C5, capacitor C6, capacitor C12, module U3, SIM card U5, and antenna ANT1, wherein one end of capacitor C3 is connected to one end of capacitor C4, one end of capacitor C5, one end of capacitor C6, pins 42 and 43 of module U3, the first end of the power module circuit, the key circuit, and the MCU control circuit; the second end of capacitor C3 is connected to the second end of capacitor C4, the second end of capacitor C5, and the second end of capacitor C6 and is grounded; pin 1 of SIM card U5 is connected to capacitor One end of C12 is connected and grounded, the second end of capacitor C12 is connected to pin 8 of SIM card U5 and pin 14 of module U3, pins 3, 6 and 7 of SIM card U5 are connected to pins 11, 13 and 12 of module U3 respectively, and pins 2, 4 and 5 of SIM card U5 are all floating; pins 10, 27, 34, 36, 37, 40 and 41 of module U3 are all grounded, pins 15, 17 and 18 of module U3 are respectively connected to the MCU control circuit; pin 35 of module U3 is connected to ANT1.

[0041] In the above technical solution, the NBIoT communication circuit is used to receive temperature and pressure signals from the MCU control circuit and send them to the external monitoring platform through the wireless network; the SIM card U5 is used to authenticate the product with the NB network when it is connected to the network, the module U3 communicates with the MCU control circuit through the serial port, and the capacitors C6, C3, C4, and C5 filter the input voltage of the module U3.

[0042] Among them, one end of capacitor C3 is connected to one end of capacitor C4, one end of capacitor C5, one end of capacitor C6, pins 42 and 43 of module U3, pin 3 of power chip U2 of power module circuit, one end of resistor R5 of key circuit and the second end of resistor R3 of MCU control circuit, and pins 15, 17 and 18 of module U3 are connected to pins 27, 22 and 23 of microcontroller U4 of MCU control circuit respectively;

[0043] Preferably, the value of capacitor C6 is 100uF, the value of capacitor C3 is 100nF, the value of capacitor C4 is 100uF, the value of capacitor C5 is 10uF, and the value of capacitor C12 is 100nF; the model of SIM card U5 is a telecommunications Internet of Things card, and the model of module U3 is BC25-CNV.

[0044] The button circuit includes a button J2, a resistor R5, and a capacitor C16, wherein one end of the resistor R5 is connected to the first end of the power module circuit, the NBIoT communication circuit, and the MCU control circuit, the second end of the resistor R5 is connected to pin 1 of the button J2, one end of the capacitor C16, and the MCU control circuit, and the second end of the capacitor C16 is connected to pin 2 of the button J2 and is grounded.

[0045] In the above technical solution, the button circuit is used to confirm the alarm information after the device alarms, wherein pin 1 of button J2 is high level by default. When button J2 is pressed, pin 1 of button J2 becomes low level, and the MCU control circuit can collect this signal.

[0046] Among them, one end of the resistor R5 is connected to the 3rd pin of the power chip U2 of the power module circuit, one end of the capacitor C3 of the NBIoT communication circuit and the second end of the resistor R3 of the MCU control circuit. The second end of the resistor R5 is connected to the 1st pin of the button J2, one end of the capacitor C16 and the 16th pin of the microcontroller U4 of the MCU control circuit.

[0047] Preferably, the value of capacitor C16 is 100uF, the value of resistor R5 is 100K, and the model of button J2 is BH06-5.

[0048] The sound and light alarm module circuit includes a seat P1, a relay K1, a diode D3, a capacitor E2, a resistor R8, a resistor R10, a resistor R12, and a transistor Q2, wherein pin 1 and pin 2 of the seat P1 are respectively connected to pin 4 and pin 5 of the relay K1, pin 2 of the relay K1 is commonly connected to the positive electrode of the capacitor E2, one end of the resistor R8 and the negative electrode of the diode D3, the negative electrode of the capacitor E2 is grounded, the second end of the resistor R8 is connected to the power module circuit, the positive electrode of the diode D3 is commonly connected to pin 1 of the relay K1 and the collector of the transistor Q2, the base of the transistor Q2 is connected to one end of the resistor R10, the second end of the resistor R10 is connected to the MCU control circuit, the emitter of the transistor Q2 is connected to one end of the resistor R12, and the second end of the resistor R12 is grounded.

[0049] In the above technical solution, the sound and light alarm module circuit is used to turn on or off the sound and light alarm, wherein the relay K1 is used to control the power switch of the sound and light alarm device connected externally through the socket P1. The second end of the resistor R8 is connected to the 3rd pin of the power chip U1 of the power module circuit, and the second end of the resistor R10 is connected to the 12th pin of the single chip U4 of the MCU control circuit.

[0050] Preferably, the value of resistor R8 is 100Ω, the value of resistor R12 is 5.1Ω, and the value of resistor R10 is 5.1K; the model of diode D3 is 1N4007, the model of relay K1 is HF165FD-G, the model of socket P1 is DA129-7.26-2P, and the model of transistor Q2 is MMBTSB1781R.

[0051] The power module circuit includes a socket J1, a diode D2, a diode D1, a capacitor C1, a capacitor C2, a capacitor C7, a capacitor E1, a power chip U1, and a power chip U2, wherein pin 1 of the socket J1 is grounded, pin 2 of the socket J1 is connected to the positive electrode of the diode D2, the negative electrode of the diode D2 is connected to pin 2 of the power chip U1, pin 1 of the power chip U1 is connected to one end of the capacitor C1, one end of the capacitor C2, pin 1 of the power chip U2, one end of the capacitor C7 and the negative electrode of the capacitor E1, pin 3 of the power chip U1 is connected to the second end of the capacitor C1, the positive electrode of the diode D1 and the sound and light alarm module circuit, the negative electrode of the diode D1 is connected to one end of the capacitor C2 and pin 2 of the power chip U2; pin 3 of the power chip U2 is connected to the second end of the capacitor C7, the positive electrode of the capacitor E1, the button circuit, the NBIoT communication circuit and the MCU control circuit.

[0052] In the above technical solution, the power module circuit is used to supply power to each circuit, wherein the power chip U1 is used to convert the input voltage into a 5V voltage, and the power chip U2 is used to convert the 5V voltage into a 3.6V voltage.

[0053] Pin 3 of the power chip U1 is connected to the second end of capacitor C1, the positive electrode of diode D1 and the second end of resistor R8 of the sound and light alarm module circuit. Pin 3 of the power chip U2 is connected to the second end of capacitor C7, the positive electrode of capacitor E1, one end of resistor R5 of the button circuit, one end of capacitor C3 of the NBIoT communication circuit and the second end of resistor R3 of the MCU control circuit.

[0054] Preferably, the value of capacitor C1 is 100uF, the value of capacitor C2 is 100nF, the value of capacitor C7 is 100uF, and the value of capacitor E1 is 1000uF;

[0055] The model of diode D2 is 1N4007, the model of diode D1 is 1N4007, the model of power chip U1 is ME6210A50, the model of power chip U1 is ME6210A36, and the model of socket J1 is 5264-4A.

Claims

1. A wireless sound and light alarm, characterized in that: It includes a communication circuit, a key circuit, a power module circuit, a storage circuit, an sound and light alarm module circuit, a temperature and pressure sensor circuit and an MCU control circuit. The first end of the power module circuit is connected to the sound and light alarm module circuit, and the second end of the power module circuit is connected to the key circuit, the NBIoT communication circuit and the MCU control circuit; the MCU control circuit is also respectively connected to the temperature and pressure sensor circuit, the storage circuit, the NBIoT communication circuit, the key circuit and the sound and light alarm module circuit.

2. The wireless sound and light alarm as claimed in claim 1, characterized in that: The temperature and pressure sensor circuit includes a resistor R9, a resistor R4, a capacitor C18, and a socket J9; wherein one end of the resistor R9 is connected to one end of the resistor R4, one end of the capacitor C18, pin 4 of the socket J9, and the MCU control circuit; the second end of the resistor R9 is connected to the MCU control circuit and pin 1 of the socket J9; the second end of the resistor R4 is connected to the MCU control circuit and pin 2 of the socket J9; the second end of the capacitor C18 is connected to pin 3 of the socket J9 and is grounded.

3. The wireless sound and light alarm as claimed in claim 1, characterized in that: The storage circuit includes a storage chip U6, a resistor R7, a resistor R6, and a capacitor C15, wherein pins 1, 2, 3, and 4 of the storage chip U6 are connected to one end of the capacitor C15 and are grounded, the second end of the capacitor C15 is connected to one end of the resistor R7, one end of the resistor R6, pin 8 of the storage chip U6, and the MCU control circuit, the second end of the resistor R7 is connected to pin 6 of the storage chip U6 and the MCU control circuit, and the second end of R6 is connected to pin 5 of the storage chip U6 and the MCU control circuit.

4. The wireless sound and light alarm as claimed in claim 1, characterized in that: The NBIoT communication circuit includes capacitor C3, capacitor C4, capacitor C5, capacitor C6, capacitor C12, module U3, SIM card U5, and antenna ANT1, wherein one end of capacitor C3 is connected to one end of capacitor C4, one end of capacitor C5, one end of capacitor C6, pins 42 and 43 of module U3, the first end of the power module circuit, the key circuit, and the MCU control circuit; the second end of capacitor C3 is connected to the second end of capacitor C4, the second end of capacitor C5, and the second end of capacitor C6 and is grounded; pin 1 of SIM card U5 is connected to the One end of capacitor C12 is connected and grounded, the second end of capacitor C12 is connected to pin 8 of SIM card U5 and pin 14 of module U3, pin 3, pin 6 and pin 7 of SIM card U5 are connected to pin 11, pin 13 and pin 12 of module U3 respectively, pin 2, pin 4 and pin 5 of SIM card U5 are all floating; pin 10, pin 27, pin 34, pin 36, pin 37, pin 40 and pin 41 of module U3 are all grounded, pin 15, pin 17 and pin 18 of module U3 are respectively connected to the MCU control circuit; pin 35 of module U3 is connected to ANT1.

5. The wireless sound and light alarm as claimed in claim 1, characterized in that: The button circuit includes a button J2, a resistor R5, and a capacitor C16, wherein one end of the resistor R5 is connected to the first end of the power module circuit, the NBIoT communication circuit, and the MCU control circuit, the second end of the resistor R5 is connected to pin 1 of the button J2, one end of the capacitor C16, and the MCU control circuit, and the second end of the capacitor C16 is connected to pin 2 of the button J2 and is grounded.

6. The wireless sound and light alarm as claimed in claim 1, characterized in that: The sound and light alarm module circuit includes a seat P1, a relay K1, a diode D3, a capacitor E2, a resistor R8, a resistor R10, a resistor R12, and a transistor Q2, wherein pin 1 and pin 2 of the seat P1 are respectively connected to pin 4 and pin 5 of the relay K1, pin 2 of the relay K1 is commonly connected to the positive electrode of the capacitor E2, one end of the resistor R8 and the negative electrode of the diode D3, the negative electrode of the capacitor E2 is grounded, the second end of the resistor R8 is connected to the power module circuit, the positive electrode of the diode D3 is commonly connected to pin 1 of the relay K1 and the collector of the transistor Q2, the base of the transistor Q2 is connected to one end of the resistor R10, the second end of the resistor R10 is connected to the MCU control circuit, the emitter of the transistor Q2 is connected to one end of the resistor R12, and the second end of the resistor R12 is grounded.

7. The wireless sound and light alarm as claimed in claim 1, characterized in that: The power module circuit includes a socket J1, a diode D2, a diode D1, a capacitor C1, a capacitor C2, a capacitor C7, a capacitor E1, a power chip U1, and a power chip U2, wherein pin 1 of the socket J1 is grounded, pin 2 of the socket J1 is connected to the positive electrode of the diode D2, the negative electrode of the diode D2 is connected to pin 2 of the power chip U1, pin 1 of the power chip U1 is connected to one end of the capacitor C1, one end of the capacitor C2, pin 1 of the power chip U2, one end of the capacitor C7 and the negative electrode of the capacitor E1, pin 3 of the power chip U1 is connected to the second end of the capacitor C1, the positive electrode of the diode D1 and the sound and light alarm module circuit, the negative electrode of the diode D1 is connected to one end of the capacitor C2 and pin 2 of the power chip U2; pin 3 of the power chip U2 is connected to the second end of the capacitor C7, the positive electrode of the capacitor E1, the button circuit, the NBIoT communication circuit and the MCU control circuit.

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