Electrical circuit detection device with temperature and electromagnetic detection function

Abstract

The utility model relates to the technical field of electrical detection, in particular to an electrical circuit detection device with a temperature and electromagnetic detection function, which comprises a main controller, an ASK signal receiving interface, a serial peripheral interface, an ADC signal receiving interface and a USART serial port are arranged in the main controller, and the ASK signal receiving interface receives door magnetic signals of a wireless door magnetic detector. The serial peripheral interface receives a residual current magnitude signal of the residual current sensor and a single-phase current effective value signal of the current mutual inductance sensor. The ADC signal receiving interface receives a crystal oscillator oscillation frequency signal of the temperature sensor. And the control signal is input into the NB-IoT communication module through a USART serial port. And the NB-IoT communication module uploads the packaged data of the signal and the control signal to the Internet of Things cloud platform. The electric power system is accurately monitored, early warning is given out in time, and higher performance is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical detection, in particular to an electrical circuit detection device with temperature and electromagnetic detection functions. Background Art

[0002] Abnormal working conditions of various electrical lines and equipment may become the source of electrical fires, such as abnormal opening of distribution cabinets or damage to cables by rats, resulting in leakage; large loads in power lines causing overheating of the lines; leakage caused by aging and damage of insulation; various forms of short circuits in electrical lines; improper wiring methods resulting in poor contact and heating of conductors; and the formation of high-energy and high-heat arcs.

[0003] According to years of statistical data and experience on electrical fires. Electrical fires are mostly caused by abnormal increase in current, which generates a large amount of heat within a certain period of time, exceeding the tolerance of the electrical circuit and burning, or igniting flammable materials. Apart from the two situations of increased load and short circuit, abnormal current values ​​are usually caused by arcs, sparks and leakage current. Before an electrical fault evolves into a fire, the value of the residual current and the value of the temperature will rise sharply, so the traditional electrical fire detection system usually consists of a temperature monitoring part and a residual current monitoring part. Most of the electrical fire monitoring equipment that is currently popular on the market adopts a bus structure, which requires slotting and reserving wall holes, which is time-consuming, labor-intensive and costly. This type of electrical fire monitoring equipment is not practical for old residential areas and vast rural areas. Utility Model Content

[0004] In order to solve the above problems existing in the prior art, the utility model provides an electrical circuit detection device with temperature and electromagnetic detection functions, including a main controller, wherein the main controller is provided with an ASK signal receiving interface, wherein the ASK signal receiving interface receives the door magnetic signal of the wireless door magnetic detector, and the door magnetic signal is also the state signal of the distribution cabinet door, and the state of the distribution cabinet door is monitored by the door magnetic signal. The wireless door magnetic detection module is connected to the main controller by amplitude shift keying modulation, and the amplitude is regarded as a variable and the frequency phase is regarded as a constant. When the modulation signal is "1", the carrier amplitude is the maximum value, that is, the carrier is connected to realize information transmission. When the modulation signal is "0", the carrier amplitude is zero, that is, the information is not transmitted when the carrier is not connected.

[0005] The main controller is also provided with a serial peripheral interface, which receives the residual current magnitude signal of the residual current sensor, and the serial peripheral interface receives the single-phase current effective value signal of the current mutual inductance sensor. The residual current sensor is provided with a three-phase line. When the power line is in an abnormal state, the vector sum of the three-phase currents A, B, and C in the three-phase line is not zero, and current flows in the center line N, and the residual current detector senses the current.

[0006] The main controller is also provided with an ADC signal receiving interface, and the ADC signal receiving interface receives a crystal oscillation frequency signal of a temperature sensor;

[0007] The main controller is also provided with a USART serial port, and the main controller inputs the control signal into the NB-IoT communication module through the USART serial port;

[0008] The NB-IoT communication module uploads the packaged data of the door magnetic signal, the residual current magnitude signal, the single-phase current effective value signal, the crystal oscillation frequency signal and the control signal to the IoT cloud platform.

[0009] Specifically, the serial peripheral interface is also connected to a display screen.

[0010] Specifically, the main controller is further provided with a human-machine interaction interface, the human-machine interaction interface receives the alarm termination signal sent by the key module, and the human-machine interaction interface sends an audible and visual alarm signal to the audible and visual alarm module.

[0011] Specifically, the ADC signal receiving interface converts the crystal oscillation frequency into a temperature change analog signal, and then converts the temperature change analog signal into a temperature change digital signal.

[0012] Specifically, the Internet of Things cloud platform is connected with the web page and the host computer to achieve end-to-end control and management effects.

[0013] Specifically, the residual current sensor and the current mutual inductance sensor are connected to an electric meter chip, and the other end of the electric meter chip relative to the residual current sensor and the current mutual inductance sensor is connected to the serial peripheral interface.

[0014] The beneficial effects of the utility model are:

[0015] (1) By setting up monitoring sensors for door magnetic status, residual current, current mutual inductance, and temperature data, the power system can be monitored more accurately and early warnings can be issued in a timely manner to reduce losses and casualties;

[0016] (2) By setting a fuel meter chip between the residual current sensor, the current mutual inductance sensor and the serial peripheral interface, excessive occupation of the ADC channel is avoided and the performance of the main control system is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Description of main component symbols:

[0020] In the figure: 1. Main controller; 2. Wireless door magnetic detector; 3. Display screen; 4. Key module; 101. ASK signal receiving interface; 102. Serial peripheral interface; 103. ADC signal receiving interface; 104. USART serial port; 105. Human-computer interaction interface. DETAILED DESCRIPTION

[0021] In order to further explain the technical means and effects adopted by the utility model to achieve the predetermined utility model purpose, the specific implementation methods, structures, features and effects of the utility model are clearly and completely described below in combination with the accompanying drawings and preferred embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In the description of the present application, it should be understood that the orientation or position relationship indicated by "inside" or "outside" etc. is based on the orientation or position described in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, a specific orientation structure and operation, and therefore cannot be understood as a limitation on the present application.

[0023] Reference Figure 1 , an electrical circuit detection device with temperature and electromagnetic detection functions disclosed by the utility model, including a main controller, an ASK signal receiving interface is provided in the main controller, the ASK signal receiving interface receives the door magnetic signal of the wireless door magnetic detector, the door magnetic signal is also the status signal of the distribution cabinet door, and the status of the distribution cabinet door is monitored by the door magnetic signal. The wireless door magnetic detection module is connected to the main controller using amplitude shift keying modulation. In essence, the amplitude is regarded as a variable, the frequency phase is regarded as a constant, and the information is transmitted through the amplitude of the carrier signal. When the modulation signal is "1", the carrier amplitude is the maximum value, that is, the carrier is connected to realize information transmission. When the modulation signal is "0", the carrier amplitude is zero, that is, the information is not transmitted when the carrier is not connected.

[0024] The main controller is also provided with a serial peripheral interface, which receives the residual current magnitude signal of the residual current sensor, and the serial peripheral interface receives the single-phase current effective value signal of the current mutual inductance sensor. The residual current sensor is provided with a three-phase line. When the power line is in an abnormal state, the vector sum of the three-phase currents A, B, and C in the three-phase line is not zero, and current flows in the center line N, and the residual current detector senses the current.

[0025] The main controller is also provided with an ADC signal receiving interface, and the ADC signal receiving interface receives a crystal oscillation frequency signal of a temperature sensor;

[0026] The main controller is also provided with a USART serial port. After the main controller analyzes the door magnetic signal, the residual current magnitude signal, the single-phase current effective value signal and the crystal oscillation frequency signal to obtain a control signal, the control signal is input into the NB-IoT communication module through the USART serial port;

[0027] The NB-IoT communication module performs signal analysis and packaging on the door magnetic signal, the residual current magnitude signal, the single-phase current effective value signal, the crystal oscillation frequency signal and the control signal to obtain packaged data, and the NB-IoT communication module uploads the packaged data to the Internet of Things cloud platform.

[0028] Specifically, the serial peripheral interface is also connected to a display screen.

[0029] Specifically, the main controller is further provided with a human-machine interaction interface, the human-machine interaction interface receives the alarm termination signal sent by the key module, and the human-machine interaction interface sends an audible and visual alarm signal to the audible and visual alarm module.

[0030] Specifically, the ADC signal receiving interface converts the crystal oscillation frequency into a temperature change analog signal, and then converts the temperature change analog signal into a temperature change digital signal.

[0031] Specifically, the Internet of Things cloud platform is connected with the web page and the host computer to achieve end-to-end control and management effects.

[0032] Specifically, the residual current sensor and the current mutual inductance sensor are connected to an electric meter chip, and the other end of the electric meter chip relative to the residual current sensor and the current mutual inductance sensor is connected to the serial peripheral interface.

[0033] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An electrical circuit detection device with temperature and electromagnetic detection functions, comprising a main controller (1), characterized in that: The main controller (1) is provided with an ASK signal receiving interface (101), and the ASK signal receiving interface (101) receives a door magnetic signal from a wireless door magnetic detector (2); The main controller (1) is further provided with a serial peripheral interface (102), wherein the serial peripheral interface (102) receives a residual current magnitude signal from a residual current sensor, and the serial peripheral interface (102) receives a single-phase current effective value signal from a current mutual inductance sensor; The main controller (1) is further provided with an ADC signal receiving interface (103), wherein the ADC signal receiving interface (103) receives a crystal oscillation frequency signal of a temperature sensor; The main controller (1) is also provided with a USART serial port (104), and the main controller (1) inputs a control signal into the NB-IoT communication module via the USART serial port (104); The NB-IoT communication module uploads the packaged data of the door magnetic signal, the residual current magnitude signal, the single-phase current effective value signal, the crystal oscillation frequency signal and the control signal to the IoT cloud platform.

2. The electrical circuit detection device with temperature and electromagnetic detection functions according to claim 1, characterized in that: The serial peripheral interface (102) is also connected to the display screen (3).

3. The electrical circuit detection device with temperature and electromagnetic detection functions according to claim 1, characterized in that: The main controller (1) is also provided with a human-machine interaction interface (105), wherein the human-machine interaction interface (105) receives an alarm stop signal sent by the key module (4), and wherein the human-machine interaction interface (105) sends an audible and visual alarm signal to the audible and visual alarm module.

4. The electrical circuit detection device with temperature and electromagnetic detection functions according to claim 1, characterized in that: The ADC signal receiving interface (103) converts the crystal oscillation frequency into a temperature change analog signal, and then converts the temperature change analog signal into a temperature change digital signal.

5. The electrical circuit detection device with temperature and electromagnetic detection functions according to claim 1, characterized in that: The Internet of Things cloud platform is connected to the web page and the host computer.

6. The electrical circuit detection device with temperature and electromagnetic detection functions according to claim 1, characterized in that: The residual current sensor and the current mutual inductance sensor are connected to an electric quantity meter chip, and the other end of the electric quantity meter chip relative to the residual current sensor and the current mutual inductance sensor is connected to the serial peripheral interface (102).

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