Temperature detection tail cover for strong current wiring terminal of electric energy meter and control method

Abstract

The invention discloses an electric energy meter strong current wiring terminal temperature detection tail cover and a control method, and mainly relates to the technical field of power equipment operation monitoring. Comprising a cover body, the cover body is of a hollow cuboid box body structure, a connecting mechanism is arranged on the inner bottom surface of the cover body, a plurality of first screw holes are formed in the inner bottom surface of the cover body in a penetrating mode, and a detection module, a management module, a communication module and a power supply module are integrated on the inner bottom surface of the cover body; the power supply module is electrically connected with the detection module, the management module and the communication module, and the management module is in data connection with the detection module and the communication module. The electric energy meter tail temperature monitoring device has the advantages that the blank of real-time monitoring of the electric energy meter tail temperature is solved, the electric energy meter tail temperature condition can be known in real time, and real-time alarm reminding is carried out when the meter tail temperature exceeds the limit.

Description

Technical Field

[0001] The invention relates to the technical field of power equipment operation monitoring, in particular to a temperature detection tail cover of a strong current connection terminal of an electric energy meter and a control method thereof. Background Art

[0002] The high-voltage wiring terminals of the electricity meter are not installed in a standardized manner. As the user load increases, heat will occur, sparks will be generated, the meter tail will be burned, and even a fire may occur, burning the electricity meter or even the meter box, causing a fire.

[0003] Since there is strong electricity at the terminal block at the end of the meter, the existing technical method is to manually use an infrared thermometer to measure the temperature of the high-voltage terminal block at the end of the meter on site. The manual detection method cannot be carried out continuously 24 hours a day due to labor costs and other reasons. It is easy for the customer load to be low during manual detection, and the heating of the end of the meter is not obvious, resulting in missed detection and missed reporting. It is impossible to fully reflect the temperature changes of the end of the meter on site, and it is impossible to discover problems in advance as soon as possible, and prevent accidents such as fire caused by excessive temperature in advance.

[0004] Therefore, there is an urgent need for a temperature detection tail cover for the high-voltage wiring terminals of an electric energy meter and a control method to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a temperature detection tail cover and control method for the high-voltage wiring terminal of an electric energy meter, which solves the gap in real-time monitoring of the temperature at the tail of the electric energy meter, can understand the temperature of the tail of the electric energy meter in real time, and give a real-time alarm when the temperature at the tail of the meter exceeds the limit.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0007] Provided is a temperature detection tail cover for a high-voltage terminal block of an electric energy meter, comprising a cover body, the cover body being a hollow rectangular box structure, a connecting mechanism being arranged on the inner bottom surface of the cover body, a plurality of first screw holes being arranged through the inner bottom surface of the cover body, a detection module, a management module, a communication module and a power supply module being integrated on the inner bottom surface of the cover body, the power supply module being electrically connected to the detection module, the management module and the communication module respectively, and the management module being data connected to the detection module and the communication module respectively.

[0008] Preferably, the top surface and the rear surface of the cover body are provided with openings, and the top front surface of the cover body is provided with a groove.

[0009] Preferably, the connecting mechanism includes two studs, which are respectively arranged at the left and right ends of the inner bottom surface of the cover body, and a second screw hole is arranged through the studs, and the second screw hole passes through the bottom surface of the cover body. The connecting mechanism also includes a buckle.

[0010] Preferably, the detection module includes a temperature measurement and control single chip microcomputer, the output end of the temperature measurement and control single chip microcomputer is connected to a temperature measuring probe, and the model of the temperature measuring probe is MLX90614ESF-BAA.

[0011] Preferably, the management module includes a high-speed CPU, an EEPROM, a clock management chip DS3231, a storage chip and an LED indicator light of the STC.

[0012] Preferably, the communication module includes a 4G DTU module and a Bluetooth communication module, the 4G DTU module model is WH-GM800TF-CT-4-N41, and the Bluetooth communication module model is HLK-B40.

[0013] A control method for the temperature detection tail cover of the high-voltage terminal of the electric energy meter is provided, comprising the following steps:

[0014] S1: Collect temperature data information of the electric meter;

[0015] S2: Analyze the collected temperature data information;

[0016] S3: Send the parsed temperature data information to the remote client and display it through the LED indicator.

[0017] Preferably, the step S1 specifically comprises:

[0018] The temperature inside the electric meter is collected by a temperature measuring probe arranged on the cover, and the collected temperature data information is sent to the management module.

[0019] Preferably, the step S2 is specifically:

[0020] The CPU of the management module compares the collected temperature data information with the temperature threshold stored in the CPU. If the collected temperature information is greater than or equal to the temperature threshold, it is recorded as abnormal temperature; if the collected temperature information is less than the temperature threshold, it is recorded as normal temperature.

[0021] Preferably, the step S3 is specifically:

[0022] When the temperature information is abnormal, the management module sends the temperature abnormality information to the client through the communication module, and the management module displays the temperature level through the LED indicator.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] 1. It solves the gap of real-time monitoring of the temperature at the tail of the electric energy meter. It can understand the temperature of the tail of the electric energy meter in real time, and give a real-time alarm reminder when the temperature at the tail of the electric energy meter exceeds the limit, so as to realize the real-time reporting of the temperature exceeding the limit at the tail of the electric energy meter, realize the timely discovery of the temperature problem at the tail of the electric energy meter, and avoid the damage and burning of the electric energy meter caused by the increase of the temperature at the tail of the electric energy meter; the occurrence of fires such as the burning of the meter box;

[0025] 2. The meter tail module uses 6 detection modules corresponding to the structure of the 6-way high-voltage wiring terminals of the electric energy meter, supports the connection of Bluetooth modules and the upload of real-time data of 4G modules, which are not available in previous temperature measurement equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is the front view of the present invention.

[0027] Figure 2 It is a schematic diagram of the internal structure of the present invention.

[0028] Figure 3 This is the connection method between the temperature measurement and control single chip microcomputer and the temperature measurement probe of the present invention.

[0029] Figure 4 It is a schematic diagram of the LED lamp driving method of the present invention.

[0030] Figure 5 It is a schematic diagram of the wiring method of the clock chip of the present invention.

[0031] Figure 6 It is a schematic diagram of the connection mode of the Bluetooth communication module of the present invention.

[0032] Figure 7 It is a flow chart of the method of the present invention.

[0033] Numbers shown in the accompanying drawings:

[0034] 1. Cover body; 2. First screw hole; 3. Second screw hole; 4. Buckle. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the application equally.

[0036] In the present invention, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention, and do not specifically refer to any part or element in the present invention and should not be understood as limitations on the present invention.

[0037] In the present invention, terms such as "fixed connection", "connected", "connection", etc. should be understood in a broad sense, indicating that it can be fixedly connected, integrally connected or detachably connected; it can be directly connected or indirectly connected through an intermediate medium. Relevant scientific research or technical personnel in this field can determine the specific meanings of the above terms in the present invention according to specific circumstances, and they should not be understood as limiting the present invention.

[0038] Example:

[0039] This embodiment provides a temperature detection tail cover for the high-voltage wiring terminal of an electric energy meter, such as Figure 1-2 As shown, it includes a cover body, which is a hollow rectangular box structure. A connecting mechanism is arranged on the inner bottom surface of the cover body. A plurality of first screw holes are arranged through the inner bottom surface of the cover body. A detection module, a management module, a communication module and a power supply module are integrated on the inner bottom surface of the cover body. The power supply module is electrically connected to the detection module, the management module and the communication module respectively, and the management module is data connected to the detection module and the communication module respectively.

[0040] Among them, the top surface and the back of the cover body are provided with openings, the front top of the cover body is provided with a groove, the connecting mechanism includes two studs, the two studs are respectively provided at the left and right ends of the inner bottom surface of the cover body, and the studs are provided with a second screw hole, and the second screw hole passes through the bottom surface of the cover body. The connecting mechanism also includes a buckle. The size of the temperature measuring tail cover is adapted to the tail of the three-phase electric energy meter. The temperature measuring tail cover can replace the tail cover of the electric energy meter. Compared with the handheld infrared temperature measuring device, it can be firmly fixed above the strong current terminal of the electric energy meter. Because the strong current terminal of the electric energy meter is small in area, the fixing method of the tail cover is adapted to be firm and reliable, which can avoid the temperature deviation caused by the jitter that is easy to occur in manual temperature measurement, thereby ensuring the accuracy of temperature measurement.

[0041] The size of the temperature measuring tail cover is designed to be consistent with the size of the original tail cover of the electric energy meter. It is easy to install on site. During the installation process, the original tail cover is removed and the temperature measuring tail cover is inserted. This installation method is simpler and more secure than the traditional fixed clip-on temperature measuring equipment. In addition, after the installation, the temperature measuring tail cover still maintains the protection and anti-electricity theft function of the original tail cover.

[0042] The detection module is located under the temperature measurement tail cover and integrates a temperature measurement and control microcontroller to control six MLX90614ESF-BAA high-precision, large-range infrared temperature detection probes (hereinafter referred to as temperature measurement probes) from Melexis. Each probe corresponds to one high-voltage wiring terminal of the electric energy meter, which can realize simultaneous measurement of six temperatures.

[0043] The temperature probe used in the temperature measuring tail cover is calibrated in the factory within the temperature range of: ambient temperature -40...125°C, object temperature -70...382.2°C. This temperature probe has higher accuracy and resolution than the commonly used handheld and fixed infrared temperature measuring devices, and can effectively and quickly detect temperature exceeding the limit of the high-voltage terminal.

[0044] The detection module is driven by a temperature measurement and control microcontroller through the IIC bus to drive 6 temperature measuring probes. The temperature of the power meter terminal is measured every 10 seconds. It can be tested 24 hours a day to achieve high-frequency collection of the temperature at the end of the meter. The connection between the temperature measurement and control microcontroller and the temperature measuring probe is as follows: Figure 3 shown.

[0045] This connection method is a serial connection method. Compared with the PWM communication method, each probe requires the temperature measurement and control microcontroller to allocate two communication pins (6 detection modules require 12 pins). The serial connection method temperature measurement and control microcontroller only needs to allocate two pins to communicate with 6 detection modules, saving the communication pins of the temperature measurement and control microcontroller.

[0046] The detection module adopts an independent circuit board design, and a distance of 2 cm is maintained between the probe and the high-voltage terminal. This detection distance is determined through multiple tests. At this distance, it can ensure that the field of view of the temperature measuring probe fully covers the high-voltage terminal, and can effectively avoid the problem of low detection temperature caused by excessive field of view and coverage, thereby ensuring accurate and reliable temperature detection. In addition, the measurement distance of 2 cm is much greater than the high-voltage discharge distance of the high-voltage terminal, thereby ensuring the safe operation of the equipment.

[0047] The detection module adopts a separate circuit board design, and the temperature probes and the temperature probes and other components are designed to maintain a minimum distance of 5mm. If the temperature probes or the temperature probes and other components are too close, the temperature probe housing will be inserted by other components, resulting in inaccurate measurement of the ambient temperature, which will in turn cause the temperature detected by the temperature probe to be inaccurate, reducing the accuracy of the temperature probe. The separate circuit board design increases the distance between the temperature probes and the temperature probes and other components, reducing interference from components.

[0048] The temperature measurement and control CPU and the temperature measuring probe use SMBus (system management bus) communication. Compared with the PWM communication method, this communication method has a faster communication rate and transmits data as a digital signal, ensuring the accuracy of the data.

[0049] The management module, the high-speed CPU with integrated STC, is connected to the detection module through a 4-pin plug, which includes 3.3V VDD, GND, RX, and TX. The 4-pin plug connection is simpler and more reliable than the flat cable connection. It is also more convenient to repair and replace the detection module if it fails.

[0050] The management module and the detection module use serial port communication; the management module integrates a 16MB large-capacity EEPROM, which can store the temperature data detected by 6 temperature probes in the last 3 days;

[0051] The management module stores the temperature over-limit thresholds of the six high-voltage terminals. The detection module obtains the temperature values ​​of the six infrared probes from the detection module every 10 seconds, and immediately compares them with the temperature over-limit thresholds of the six high-voltage terminals. If the problem is found to be exceeded, an alarm is immediately generated, which is sent to the background management system through the communication module and the corresponding channel LED indicator is lit locally to remind on-site personnel that the temperature is out of limit.

[0052] In order to intuitively display the temperature status of the high-voltage terminal at the end of the meter, the detection module is designed with 6 LED temperature over-limit indicators. The 6 LED indicators are directly controlled by the 6 pins of the high-speed CPU of the STC inside the management module. The control circuit is as follows: Figure 4 As shown, the current injection driving method is adopted. Since the driving ability of the microcontroller is weak, the current injection method is better than the current pulling method.

[0053] When the management module CPU detects that the temperature of the corresponding high-voltage terminal exceeds the limit, it drives the corresponding LED light to light up, indicating that the on-site temperature exceeds the limit. The LED indicator light can only be turned off after the on-site personnel use Bluetooth connection to reset the alarm channel. This method is simpler, more reliable, more efficient, and can save costs compared to the previous LCD display method.

[0054] In order to obtain accurate temperature over-limit time and maintain a stable data collection cycle, the management module integrates a high-precision clock management chip DS3231. The chip is connected to the management module CPU as follows Figure 5 shown.

[0055] The use of high-precision clock chips is better than using the CPU's own clock chip. This high-precision clock chip can provide accurate clock signals for the CPU, which can ensure the accuracy of the time when the temperature exceeds the limit on site, and facilitate the location of subsequent problems. It prevents the alarm time error caused by time offset, which in turn affects the accuracy of the temperature limit judgment.

[0056] In addition, a 3.3V CR1220 backup battery is specially designed for this chip to ensure that the clock can still be accurately maintained after the temperature measurement tail cover loses power. Compared with equipment without a backup battery, it saves the communication cost of synchronization.

[0057] The management module integrates three atmlh052 flash storage chips, which can provide 64K storage for the CPU, ensuring that the management module can store the latest 100 temperature over-limit events and the temperature data of the 6-channel modules in the latest 3 days, making it convenient for on-site personnel to trace data.

[0058] The communication module integrates the 4G DTU module of the UIoT. The model of the 4G DTU module is WH-GM800TF-CT-4-N41. The 4G communication module can quickly upload the temperature data of the tail measured by the detection module to the temperature monitoring and forecasting system in real time, realizing remote real-time viewing and storage of data; the temperature monitoring system uses the WeChat applet to notify relevant management personnel to deal with the temperature exceeding the limit. The UART interface is used between the 4G communication module and the management module, and the communication baud rate is 921600bps. The network transparent transmission mode is used between the 4G module and the background master station.

[0059] The temperature measurement tail cover 4G communication has enabled the dual-socket connection mode. All data are sent to the two main station front-end machines at the same time, forming a data dual backup mechanism. Compared with the single socket connection method, the dual-socket connection method ensures the reliability of data upload and the dual servers are in backup mode to ensure data security.

[0060] In addition, SSL / TLS encrypted communication is specifically enabled during 4G communication to ensure encrypted transmission of data in TCP transparent transmission mode.

[0061] The communication module of the tail cover also integrates a Bluetooth communication module, which communicates with the management module microcontroller through the serial port bus. The on-site mobile phone APP can read the current tail temperature, over-limit situation, over-limit occurrence time, and temperature change curve in the past three days through the Bluetooth link, and realize on-site temperature analysis function when the 4G module is disconnected.

[0062] The Bluetooth communication module uses the HLK-B40 master-slave integrated Bluetooth transparent transmission module of Hailingke. The module is connected to the management module CPU as follows: Figure 6 shown.

[0063] The Bluetooth communication module and the management CPU use UART communication with a communication rate of 9600bps, which can ensure that the on-site mobile phones and PDA devices can quickly connect to the temperature measurement tail cover, and read the current temperature of the high-voltage terminal at the end of the meter, the historical temperature within 3 days, and the temperature over-limit alarm threshold on site.

[0064] In addition, it supports on-site mobile phones or PDA devices to connect to the temperature measurement tail cover via Bluetooth, synchronize the temperature measurement tail cover, modify the alarm threshold and reset the alarm to complete on-site problem handling.

[0065] Mobile phones, PDA devices or laptop devices communicate with the detection module through Bluetooth and 4G modules, using the mdbus protocol. We have optimized and streamlined the protocol, removed some redundant protocols, increased the communication rate, and reduced the communication traffic. For specific communication protocols, see Appendix 1, Communication protocol between the temperature measurement tail cover and the main station

[0066] The power module of the tail cover uses the probes on both sides of the measurement module integrated at the bottom of the tail cover to draw power from the A phase and the neutral line at the end of the electric energy meter. After the detection module is inserted into the end of the meter, the power probe will automatically touch the screws at the high-voltage terminal at the end of the meter and automatically connect the power circuit. This power-drawing mode is simpler and more efficient than the power-drawing method of drawing out the power line from the end of the electric energy meter and crimping it to the high-voltage terminal. See the power-drawing method of the power module for details. Figure 6 , the power supply module draws power from the end of the table.

[0067] The power supply module uses a highly integrated, small-volume integrated switching power supply to convert 220V AC power into 12V DC power to power the detection module, management module, etc. The power supply module has a wide input voltage and can operate stably at AC 100V to 240V. The power supply module is small in size and can be integrated into the tail cover of the meter. It has an incomparable volume advantage over existing industrial frequency power supplies.

[0068] like Figure 7 As shown, this embodiment also provides a control method for the temperature detection tail cover of the high-voltage terminal of the electric energy meter as described above, comprising the following steps:

[0069] S1: Collect temperature data information of the electric meter;

[0070] S2: Analyze the collected temperature data information;

[0071] S3: Send the parsed temperature data information to the remote client and display it through the LED indicator.

[0072] The step S1 is specifically as follows:

[0073] The temperature inside the electric meter is collected by a temperature measuring probe arranged on the cover, and the collected temperature data information is sent to the management module.

[0074] The step S2 is specifically as follows:

[0075] The CPU of the management module compares the collected temperature data information with the temperature threshold stored in the CPU. If the collected temperature information is greater than or equal to the temperature threshold, it is recorded as abnormal temperature; if the collected temperature information is less than the temperature threshold, it is recorded as normal temperature.

[0076] The step S3 is specifically as follows:

[0077] When the temperature information is abnormal, the management module sends the temperature abnormality information to the client through the communication module, and the management module displays the temperature level through the LED indicator.

[0078] The above is a specific description of the preferred implementation of the present invention, but the present invention is not limited to the described embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A temperature detection tail cover for a high-voltage terminal of an electric energy meter, characterized in that: It includes a cover body, which is a hollow rectangular box structure. A connecting mechanism is arranged on the inner bottom surface of the cover body. A plurality of first screw holes are arranged through the inner bottom surface of the cover body. A detection module, a management module, a communication module and a power supply module are integrated on the inner bottom surface of the cover body. The power supply module is electrically connected to the detection module, the management module and the communication module respectively, and the management module is data connected to the detection module and the communication module respectively.

2. According to claim 1, a temperature detection tail cover for a high-voltage terminal of an electric energy meter, characterized in that: The top surface and the rear surface of the cover body are provided with openings, and the top front surface of the cover body is provided with a groove.

3. According to claim 1, a temperature detection tail cover for a high-voltage terminal of an electric energy meter is characterized in that: The connection mechanism includes two studs, which are respectively arranged at the left and right ends of the inner bottom surface of the cover body. A second screw hole is arranged through the studs, and the second screw hole passes through the bottom surface of the cover body. The connection mechanism also includes a buckle.

4. According to claim 1, a temperature detection tail cover for a high-voltage terminal of an electric energy meter, characterized in that: The detection module includes a temperature measurement and control single chip microcomputer, and the output end of the temperature measurement and control single chip microcomputer is connected to a temperature measurement probe, and the model of the temperature measurement probe is MLX90614ESF-BAA.

5. According to claim 1, a temperature detection tail cover for a high-voltage terminal of an electric energy meter, characterized in that: The management module includes a high-speed CPU, an EEPROM, a clock management chip DS3231, a storage chip and an LED indicator light of the STC.

6. According to claim 1, a temperature detection tail cover for a high-voltage terminal of an electric energy meter, characterized in that: The communication module includes a 4G DTU module and a Bluetooth communication module. The model of the 4G DTU module is WH-GM800TF-CT-4-N41, and the model of the Bluetooth communication module is HLK-B40.

7. A control method for the temperature detection tail cover of the high-voltage terminal of an electric energy meter as claimed in claim 1, characterized in that: The following steps are involved: S1: Collect temperature data information of the electric meter; S2: Analyze the collected temperature data information; S3: Send the parsed temperature data information to the remote client and display it through the LED indicator.

8. A control method according to claim 7, characterized in that: The step S1 is specifically as follows: The temperature inside the electric meter is collected by a temperature measuring probe arranged on the cover, and the collected temperature data information is sent to the management module.

9. A control method according to claim 7, characterized in that: The step S2 is specifically as follows: The CPU of the management module compares the collected temperature data information with the temperature threshold stored in the CPU. If the collected temperature information is greater than or equal to the temperature threshold, it is recorded as abnormal temperature; if the collected temperature information is less than the temperature threshold, it is recorded as normal temperature.

10. A control method according to claim 7, characterized in that: The step S3 is specifically as follows: When the temperature information is abnormal, the management module sends the temperature abnormality information to the client through the communication module, and the management module displays the temperature level through the LED indicator.

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