Distributed electric parameter monitoring circuit

Abstract

The utility model relates to the technical field of electric parameter monitoring, in particular to a distributed electric parameter monitoring circuit, which comprises a host control circuit and a plurality of detection circuits used for detecting electric parameters of all point positions of a cable. The detection circuit comprises a voltage acquisition module, a current acquisition module, a first main control module, an LORA wireless sending module and a first power taking module, the LORA wireless sending module is wirelessly connected with the host control circuit, and the voltage acquisition module and the current acquisition module are arranged to acquire voltage and current data of a cable; the data collection module collects data and transmits the collected data to the first main control module, the LORA wireless transmission module transmits the data processed by the first main control module to the host control circuit in a wireless mode, and the host control circuit carries out integration processing on data information, packages the data and uploads the data to the cloud platform. Therefore, basic electric parameters of the power distribution and transmission line can be monitored in real time.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical parameter monitoring, and particularly relates to a distributed electrical parameter monitoring circuit. Background Art

[0002] The working conditions of low-voltage power transmission and distribution lines are relatively harsh, and the electricity consumption situation on the user side is complex. A large number of high-power electrical appliances are turned on and off irregularly, resulting in diverse changes in the loop current. At the same time, some circuits are aging, electrical appliances are updated and iterated, and the power increases, causing the actual electricity consumption power to be far greater than the rated power that the power consumption line can bear, and resulting in overcurrent tripping and power outages, as well as line aging and damage easily occurring during peak electricity consumption periods.

[0003] On the user side, three-phase meters are equipped in the distribution room to monitor the electricity consumption situation, but only support local RS485 data reading. At the same time, the installation method is limited by the traditional fixed method and requires a large number of external line accessories. Staff need to regularly go to each community to copy the meters to obtain information, and in the event of a tripping and power outage, they can only know the fault information by passively receiving the information feedback from the user side, lacking intelligence and timeliness. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is: to provide a distributed electrical parameter monitoring circuit that can monitor the basic electrical parameters of power distribution and transmission lines in real time.

[0005] To solve the above technical problem, the technical solution adopted by the utility model is:

[0006] A distributed electrical parameter monitoring circuit includes a host control circuit and several detection circuits for detecting the electrical parameters of each point of the cable. The detection circuit includes a voltage acquisition module, a current acquisition module, a first main control module, a LORA wireless transmission module, and a first power taking module. The input ends of the voltage acquisition module and the current acquisition module are both electrically connected to the cable. The output end of the voltage acquisition module is electrically connected to the voltage input end of the first main control module. The output end of the current acquisition module is connected to the current input end of the first main control module. The output end of the first main control module is electrically connected to the input end of the LORA wireless transmission module. The output end of the LORA wireless transmission module is wirelessly connected to the host control circuit. The input end of the first power taking module is electrically connected to the cable, and the output end of the first power taking module is electrically connected to the first main control module and the LORA wireless transmission module respectively.

[0007] The beneficial effects of the utility model are as follows:

[0008] This solution collects the voltage and current data of the cable through the voltage acquisition module and the current acquisition module, and transmits the collected data to the first main control module. The data processed by the first main control module is transmitted wirelessly to the host control circuit through the LORA wireless transmission module. After the host control circuit integrates and processes the data information, the data is packaged and uploaded to the cloud platform. Moreover, the first power supply module can directly obtain power from the cable to supply power to the first main control module and the LORA wireless transmission module. Adopting the integrated method of power supply and acquisition can avoid the need for traditional devices to install sensors and add external leads to obtain electrical parameter information, optimize the sampling method and the product circuit structure, simplify the installation method, and make the installation and debugging more convenient. This solution adopts a wireless multi-point data acquisition method, which can avoid the time-consuming process of manually recording data on-site. At the same time, the manual data recording method has a long cycle and a high probability of human error. The wireless multi-point data acquisition method realizes the function of real-time acquisition, ensures accuracy, and greatly improves the data utilization rate. The distributed electrical parameter data of the line can be used to evaluate the power consumption trend and judge the operation status of the line. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a block diagram of the module connection of the detection circuit according to the present invention;

[0010] Figure 2 It is a block diagram of the module connection of the host control circuit according to the present invention;

[0011] Figure 3 It is a circuit schematic diagram of the distributed electrical parameter monitoring circuit according to the present invention;

[0012] Figure 4 It is a circuit schematic diagram of the first main control module and the LORA wireless transmission module of the distributed electrical parameter monitoring circuit according to the present invention;

[0013] Figure 5 It is a circuit schematic diagram of the second main control module, the LORA wireless receiving module and the GPRS module of the distributed electrical parameter monitoring circuit according to the present invention;

[0014] Reference Numeral Description:

[0015] 1. Host control circuit; 101. Second main control module; 102. LORA wireless receiving module; 103. GPRS module; 104. Second power supply module; 2. Detection circuit; 201. Voltage acquisition module; 202. Current acquisition module; 203. First main control module; 204. LORA wireless transmission module; 205. First power supply module; 206. Filter module; 3. Cable. DETAILED DESCRIPTION OF THE INVENTION

[0016] To describe in detail the technical content, achieved objectives and effects of the present utility model, the following is described in conjunction with the embodiments and with reference to the drawings.

[0017] Please refer to Figure 1 , the technical solution adopted by the present utility model is as follows:

[0018] A distributed electrical parameter monitoring circuit includes a host control circuit and several detection circuits for detecting the electrical parameters of each point of the cable. The detection circuit includes a voltage acquisition module, a current acquisition module, a first main control module, a LORA wireless transmission module and a first power taking module. The input ends of the voltage acquisition module and the current acquisition module are both electrically connected to the cable. The output end of the voltage acquisition module is electrically connected to the voltage input end of the first main control module. The output end of the current acquisition module is connected to the current input end of the first main control module. The output end of the first main control module is electrically connected to the input end of the LORA wireless transmission module. The output end of the LORA wireless transmission module is wirelessly connected to the host control circuit. The input end of the first power taking module is electrically connected to the cable. The output end of the first power taking module is respectively electrically connected to the first main control module and the LORA wireless transmission module.

[0019] It can be seen from the above description that the beneficial effects of the present utility model are as follows:

[0020] This solution collects the voltage and current data of the cable by setting a voltage acquisition module and a current acquisition module, and transmits the collected data to the first main control module. The data processed by the first main control module is transmitted to the host control circuit in a wireless form through the LORA wireless transmission module. After the host control circuit integrates and processes the data information, the data is packaged and uploaded to the cloud platform. Moreover, the first power taking module can directly take power from the cable to supply power to the first main control module and the LORA wireless transmission module. Adopting the integrated way of power taking and acquisition can avoid the need for traditional devices to install sensors and add external leads to obtain electrical parameter information, optimize the sampling method and the product circuit structure, simplify the installation method, and make the installation and debugging more convenient. This solution adopts a wireless multi-point data acquisition method, which can avoid the time-consuming of manual on-site data recording. At the same time, the manual data recording method has a long cycle and a high probability of human error. The wireless multi-point data acquisition method realizes the function of real-time acquisition, ensures the accuracy at the same time, and greatly improves the data utilization. The distributed electrical parameter data of the line can be used to evaluate the power consumption trend and judge the operation status of the line.

[0021] Further, the first power-taking module includes a resistor R8, a resistor R9, a capacitor C5, a capacitor C9, a capacitor C11, a voltage regulator diode ZD1, and a chip U1. The model of the chip U1 is ME6206A25M3G. The first pin of the chip U1 is grounded. The third pin of the chip U1 is electrically connected to the cathode of the voltage regulator diode ZD1, one end of the capacitor C11, one end of the resistor R9, one end of the resistor R8, and one end of the capacitor C5. The other end of the capacitor C5 is electrically connected to the other end of the resistor R8, and both the other end of the capacitor C5 and the other end of the resistor R8 are electrically connected to the cable. The other end of the resistor R9 is electrically connected to the other end of the capacitor C11. The second pin of the chip U1 is electrically connected to one end of the capacitor C9 and the power-taking input terminal of the first main control module. The other end of the resistor R9, the other end of the capacitor C11, the anode of the voltage regulator diode ZD1, and the other end of the capacitor C9 are all grounded.

[0022] Further, the input end of the current acquisition module is electrically connected to the input end of the first power-taking module, and both are electrically connected to the same coil circuit and are electrically connected to the cable through the coil circuit.

[0023] Further, the coil circuit includes a coil connector X2, and the coil connector X2 is electrically connected to the input end of the current acquisition module and the input end of the first power-taking module respectively.

[0024] Further, a filtering module is further included. The output end of the filtering module is electrically connected to the input end of the current acquisition module and the input end of the first power-taking module respectively, and the input end of the filtering module is electrically connected to the output end of the coil circuit.

[0025] As can be seen from the above description, the filtering module can ensure the stability of energy storage and voltage.

[0026] Further, the filtering module includes a capacitor C10, a rectifier bridge BD1, a capacitor C6, a capacitor C7, and a capacitor C8. The first end of the rectifier bridge BD1 is electrically connected to one end of the capacitor C10. The second end of the rectifier bridge BD1 is electrically connected to the other end of the capacitor C10. The third end of the rectifier bridge BD1 is electrically connected to one end of the capacitor C6, one end of the capacitor C7, one end of the capacitor C8, the input end of the current acquisition module, and the input end of the first power-taking module respectively. The fourth end of the rectifier bridge BD1 is electrically connected to the other end of the capacitor C6 and the other end of the capacitor C7 respectively. The other ends of the capacitor C6, the capacitor C7, and the capacitor C8 are all grounded.

[0027] As can be seen from the above description, after rectification by the rectifier bridge BD1 and filtering by three capacitors (capacitor C6, capacitor C7, and capacitor C8 respectively), the stability of energy storage and voltage can be ensured.

[0028] Further, the voltage acquisition module includes a coil connector X1, resistors R1, R2, R3, R4, capacitors C1, C2, C3, diodes D1, D3, D4, voltage regulators D2 and D5. The second end of the coil connector X1 is electrically connected to one end of the resistor R3, one end of the capacitor C1, and one end of the resistor R1 respectively. The other end of the resistor R1 is respectively connected to the cathode of the diode D4, one end of the voltage regulator D5, and the anode of the diode D1. The cathode of the diode D1 is electrically connected to one end of the capacitor C3 and one end of the voltage regulator D2 respectively. The other end of the voltage regulator D2 is respectively connected to one end of the resistor R4 and one end of the resistor R2. The other end of the resistor R2 is respectively connected to the cathode of the diode D2, one end of the capacitor C2, and the voltage input terminal of the first main control module. The first end of the coil connector X1 is electrically connected to the other end of the resistor R3 and the other end of the capacitor C1 respectively. The first end of the coil connector X1, the other end of the resistor R3, the other end of the capacitor C1, the anode of the diode D4, the other end of the voltage regulator D5, the other end of the capacitor C3, the other end of the resistor R4, the anode of the diode D3, and the other end of the capacitor C2 are all grounded.

[0029] As can be seen from the above description, the voltage acquisition module uses a capacitive induction sensing unit to scale the voltage information of the cable to the coil connector X1 as the voltage signal information source. Part of the energy passing through the resistor R3 and the capacitor C1 is absorbed, and the voltage signal within the sampling range is retained. The diodes D4, voltage regulator D5, and capacitor C3 are further protection devices to prevent the subsequent circuit from being burned by sudden overvoltage. The resistors R4 and R2 are voltage dividing and matching resistors to ensure that the value at Ua-AD is within the allowable range of the detection circuit, and voltage data can be obtained after conversion.

[0030] Further, the current acquisition module includes resistors R5, R6, R7, capacitor C4, diodes D6 and D7. One end of the resistor R7 is electrically connected to the cable. The other end of the resistor R7 is respectively connected to one end of the resistor R6, one end of the capacitor C4, the anode of the diode D6, the cathode of the diode D7, and one end of the resistor R5. The other end of the resistor R5 is connected to the current input terminal of the first main control module. The other end of the resistor R6, the other end of the capacitor C4, and the anode of the diode D7 are all grounded. The cathode of the diode D6 is connected to the 3.3V power supply.

[0031] As can be seen from the above description, after voltage division by the resistors R6 and R7, the value at I-AD is ensured to be within the allowable range of the detection circuit, and current data can be obtained after conversion. The diodes D6 and D7 form a protection circuit to absorb excessive energy and protect the subsequent devices. The resistor R5 is a current limiting resistor.

[0032] As described above, the second power-taking module can directly take power from the cable to supply power to the second main control module, GPRS module and LORA wireless receiving module. By adopting the integrated method of power-taking and acquisition, it can avoid the need for traditional devices to install sensors and add external leads to obtain electrical parameter information, optimize the sampling method and the product circuit structure, simplify the installation method, and make the installation and debugging more convenient.

[0033] Please refer to Figures 1 to 3 , Embodiment 1 of the present utility model is:

[0034] Please refer to Figure 1 , A distributed electrical parameter monitoring circuit, including a host control circuit 1 and several detection circuits 2 for detecting the electrical parameters of each point of the cable 3. The detection circuit 2 includes a voltage acquisition module 201, a current acquisition module 202, a first main control module 203, a LORA wireless transmission module 204 and a first power-taking module 205. The input ends of the voltage acquisition module 201 and the current acquisition module 202 are both electrically connected to the cable 3. The output end of the voltage acquisition module 201 is electrically connected to the voltage input end of the first main control module 203. The output end of the current acquisition module 202 is connected to the current input end of the first main control module 203. The output end of the first main control module 203 is electrically connected to the input end of the LORA wireless transmission module 204. The input end of the first power-taking module 205 is electrically connected to the cable 3. The output end of the first power-taking module 205 is respectively electrically connected to the first main control module 203 and the LORA wireless transmission module 204;

[0035] Please refer to Figure 2 , The host control circuit 1 includes a second main control module 101, a LORA wireless receiving module 102 and a GPRS module. There is a wireless connection between the input end of the LORA wireless receiving module 102 and the output end of the LORA wireless transmission module 204. The second main control module 101 is respectively electrically connected to the output end of the LORA wireless receiving module 102 and the input end of the GPRS module.

[0036] Please refer to Figure 3, the first power-taking module 205 includes a resistor R8, a resistor R9, a capacitor C5, a capacitor C9, a capacitor C11, a voltage regulator diode ZD1, and a chip U1. The model of the chip U1 is ME6206A25M3G. The first pin of the chip U1 is grounded. The third pin of the chip U1 is electrically connected to the cathode of the voltage regulator diode ZD1, one end of the capacitor C11, one end of the resistor R9, one end of the resistor R8, and one end of the capacitor C5. The other end of the capacitor C5 is electrically connected to the other end of the resistor R8, and both the other end of the capacitor C5 and the other end of the resistor R8 are electrically connected to the cable 3. The other end of the resistor R9 is electrically connected to the other end of the capacitor C11. The second pin of the chip U1 is electrically connected to one end of the capacitor C9 and the power-taking input end of the first main control module 203. The other end of the resistor R9, the other end of the capacitor C11, the anode of the voltage regulator diode ZD1, and the other end of the capacitor C9 are all grounded.

[0037] The input end of the current acquisition module 202 is electrically connected to the input end of the first power-taking module 205, and both are electrically connected to the same coil circuit and are electrically connected to the cable 3 through the coil circuit.

[0038] Please refer to Figure 3 , the coil circuit includes a coil connector X2, and the coil connector X2 is electrically connected to the input end of the current acquisition module 202 and the input end of the first power-taking module 205 respectively.

[0039] It further includes a filtering module 206. The output end of the filtering module 206 is electrically connected to the input end of the current acquisition module 202 and the input end of the first power-taking module 205 respectively. The input end of the filtering module 206 is electrically connected to the output end of the coil circuit.

[0040] Please refer to Figure 3 , the filtering module 206 includes a capacitor C10, a rectifier bridge BD1, a capacitor C6, a capacitor C7, and a capacitor C8. The first end of the rectifier bridge BD1 is electrically connected to one end of the capacitor C10. The second end of the rectifier bridge BD1 is electrically connected to the other end of the capacitor C10. The third end of the rectifier bridge BD1 is electrically connected to one end of the capacitor C6, one end of the capacitor C7, one end of the capacitor C8, the input end of the current acquisition module 202, and the input end of the first power-taking module 205 respectively. The fourth end of the rectifier bridge BD1 is electrically connected to the other end of the capacitor C6 and the other end of the capacitor C7 respectively. The other end of the capacitor C6, the other end of the capacitor C7, and the other end of the capacitor C8 are all grounded.

[0041] Please refer to Figure 3, the voltage acquisition module 201 includes a coil connector X1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a capacitor C2, a capacitor C3, a diode D1, a diode D3, a diode D4, a voltage stabilizing diode D2, and a voltage stabilizing diode D5. The second end of the coil connector X1 is electrically connected to one end of the resistor R3, one end of the capacitor C1, and one end of the resistor R1 respectively. The other end of the resistor R1 is respectively connected to the cathode of the diode D4, one end of the voltage stabilizing diode D5, and the anode of the diode D1. The cathode of the diode D1 is electrically connected to one end of the capacitor C3 and one end of the voltage stabilizing diode D2 respectively. The other end of the voltage stabilizing diode D2 is electrically connected to one end of the resistor R4 and one end of the resistor R2 respectively. The other end of the resistor R2 is respectively connected to the cathode of the diode D2, one end of the capacitor C2, and the voltage input end of the first main control module 203. The first end of the coil connector X1 is electrically connected to the other end of the resistor R3 and the other end of the capacitor C1 respectively. The first end of the coil connector X1, the other end of the resistor R3, the other end of the capacitor C1, the anode of the diode D4, the other end of the voltage stabilizing diode D5, the other end of the capacitor C3, the other end of the resistor R4, the anode of the diode D3, and the other end of the capacitor C2 are all grounded.

[0042] Please refer to Figure 3 , the current acquisition module 202 includes a resistor R5, a resistor R6, a resistor R7, a capacitor C4, a diode D6, and a diode D7. One end of the resistor R7 is electrically connected to the cable 3. The other end of the resistor R7 is respectively connected to one end of the resistor R6, one end of the capacitor C4, the anode of the diode D6, the cathode of the diode D7, and one end of the resistor R5. The other end of the resistor R5 is electrically connected to the current input end of the first main control module 203. The other end of the resistor R6, the other end of the capacitor C4, and the anode of the diode D7 are all grounded. The cathode of the diode D6 is connected to the 3.3V power supply.

[0043] Please refer to Figure 2 , the host control circuit 1 further includes a second power acquisition module 104. The input end of the second power acquisition module 104 is electrically connected to the cable 3. The output end of the second power acquisition module 104 is respectively connected to the second main control module 101, the GPRS module 103, and the LORA wireless receiving module 102. The second power acquisition module 104 can directly obtain power from the cable to supply power to the second main control module 101, the GPRS module 103, and the LORA wireless receiving module 102. By adopting the integrated method of power acquisition and acquisition, it can avoid the need for traditional devices to install sensors and add external leads to obtain electrical parameter information, optimize the sampling method and the product circuit structure, simplify the installation method, and make the installation and debugging more convenient.

[0044] The voltage acquisition module 201 uses a capacitive induction sensing unit to scale the voltage information of the cable to the coil connector X1 as the voltage signal information source. Part of the energy passes through the resistor R3 and the capacitor C1 and is absorbed, retaining the voltage signal within the sampling range. The diode D4, the voltage regulator diode D5, and the capacitor C3 further protect the device to prevent the subsequent circuit from being burned by sudden overvoltage. The resistors R4 and R2 are used as voltage divider matching resistors to ensure that the value at Ua-AD is within the allowable range of the detection circuit 2, and voltage data is obtained after conversion.

[0045] The current acquisition module 202 and the first power extraction module 205 share a coil circuit. After rectification by the rectifier bridge BD1 composed of the diodes D8, D9, D10, and D11, it is filtered by 3 capacitors (capacitors C6, C7, and C8 respectively) to ensure the stability of energy storage and voltage. After voltage division by the resistors R6 and R7, the value at I-AD is ensured to be within the allowable range of the detection circuit 2, and current data is obtained after conversion. The diodes D6 and D7 form a protection circuit to absorb excessive energy and protect the subsequent devices. The resistor R5 is a current-limiting resistor. Another loop after filtering serves as the energy supply module of the entire detection circuit 2 (i.e., the first power extraction module 205), and a low-power LDO chip with a wide input voltage range (i.e., chip U1) is used to ensure the stability of power supply. The voltage regulator diode ZD1 is a voltage-stabilizing protection diode. The detection circuit 2 simply processes the obtained voltage data and current data and uses the LORA wireless transmission module 204 to send the electrical parameter information of this point.

[0046] In this embodiment, the circuit structure of the second power extraction module 104 is the same as that of the first power extraction module 205, and the circuit structure of the second main control module 101 is the same as that of the first main control module 203.

[0047] The first main control module 203 includes a main control chip U6. The LORA wireless transmission module 204 includes a LORA chip U4 (model SX1268S4S), capacitors C15, C17, C18, an inductor L2, and an antenna ANT3. For the specific connection relationships between the components, please refer to Figure 4, the ADC interface of the main control chip U6 is connected to the voltage acquisition module and the current acquisition module. The SPI interface of the main control chip U6 is connected to the SPI interface of the LORA chip U4. The first main control module 203 processes the collected voltage and current information, performs data encryption processing through a pre-set protocol method, then controls the LORA chip U4 through the SPI interface, and transmits relevant data through the antenna. Among them, the capacitor C15, capacitor C17, inductor L2, capacitor C18, and antenna ANT3 jointly form the first LORA antenna conditioning circuit to ensure that the wireless loop is in an optimal state.

[0048] The second main control module 101 includes a main control chip U7. The LORA wireless receiving module 102 includes a LORA chip U3 (model SX1268S4S), capacitor C12, capacitor C13, inductor L1, capacitor C14, and antenna ANT2. The GPRS module 103 includes a GPRS chip U2 (model USR-GM3-RF), SIM card slot J1, resistor R10, capacitor C16, capacitor C19, resistor R11, resistor R13, resistor R12, capacitor C20, capacitor C21, and electrostatic protection chip U5. For the specific connection relationships between its various components, please refer to Figure 5 ;

[0049] The USART interface of the main control chip U7 is connected to the USART interface of the GPRS chip U2. The antenna interface of the GPRS chip U2 is connected to the antenna ANT1. The corresponding GND interface of the GPRS chip U2 is connected to the ground. The RST interface of the GPRS chip U2 is electrically connected to one end of the resistor R11, one end of the capacitor C20, and the sixth pin of the electrostatic protection chip U5 respectively. The other end of the capacitor C20 is grounded. The other end of the resistor R11 is connected to the RST interface of the SIM card slot J1. The DAT interface of the GPRS chip U2 is connected to one end of the resistor R10, one end of the capacitor C16, one end of the resistor R12, and the third pin of the electrostatic protection chip U5 respectively. The other end of the capacitor C16 is grounded. The other end of the resistor R12 is connected to the I / O interface of the SIM card slot J1. The other end of the resistor R10 is electrically connected to the VSIM interface of the GPRS chip U2, one end of the capacitor C19, the VCC interface of the SIM card slot J1, and the fifth pin of the electrostatic protection chip U5 respectively. The other end of the capacitor C19 is grounded. The CLK interface of the GPRS chip U2 is connected to one end of the resistor R13, one end of the capacitor C21, and the fourth pin of the electrostatic protection chip U5 respectively. The other end of the resistor R13 is connected to the CLK interface of the SIM card slot J1. The other end of the capacitor C21 is grounded. The second pin of the electrostatic protection chip U5 is grounded.

[0050] The LORA wireless receiving module 102 receives the corresponding information from the first main control module 203 through the second LORA antenna conditioning circuit, and transmits it back to the main control chip U7 of the second main control module through the SPI interface. The main control chip U7 performs data decoding processing through decompilation, discriminates the collected data, retains the complete data, removes the invalid information, and then performs secondary encryption and packaging processing on the integrated information. At the same time, the packaged data is transmitted to the GPRS chip U2 through the USART interface, and the GPRS chip U2 remotely transmits the data through the antenna and the base station to achieve long-distance data collection; among them, the capacitor C12, the capacitor C13, the inductor L1, the capacitor C14 and the antenna ANT2 jointly form the second LORA antenna conditioning circuit to ensure that the wireless loop is in the optimal state.

[0051] This solution adopts a wireless multi-point data collection method, which avoids the time-consuming manual on-site data recording. At the same time, the manual data recording method has a long cycle and a high probability of human error. The wireless multi-point data collection method realizes the function of real-time collection, and at the same time ensures the accuracy, greatly improving the data utilization. The distributed line electrical parameter data can be used to evaluate the power consumption trend and judge the operation status of the line.

[0052] This solution also adopts a non-disassembly installation method. The distributed electrical parameter device has an integrated power-taking and data-collecting function, which avoids the need for traditional devices to install sensors and add external leads to obtain electrical parameter information, optimizes the sampling method and the product circuit structure, simplifies the installation method, and makes installation and debugging more convenient.

[0053] In summary, a distributed electrical parameter monitoring circuit provided by the present utility model collects the voltage and current data of the cable through the voltage acquisition module and the current acquisition module, and transmits the collected data to the first main control module. The data processed by the first main control module is transmitted wirelessly to the host control circuit through the LORA wireless transmission module. After the host control circuit integrates and processes the data information, the data is packaged and uploaded to the cloud platform; moreover, the first power-taking module can directly take power from the cable to supply power to the first main control module and the LORA wireless transmission module. Adopting the integrated power-taking and data-collecting method can avoid the need for traditional devices to install sensors and add external leads to obtain electrical parameter information, optimize the sampling method and the product circuit structure, simplify the installation method, and make installation and debugging more convenient; this solution adopts a wireless multi-point data collection method, which can avoid the time-consuming manual on-site data recording. At the same time, the manual data recording method has a long cycle and a high probability of human error. The wireless multi-point data collection method realizes the function of real-time collection, and at the same time ensures the accuracy, greatly improving the data utilization. The distributed line electrical parameter data can be used to evaluate the power consumption trend and judge the operation status of the line.

[0054] The above are only embodiments of the present utility model, and thus do not limit the patent scope of the present utility model. Any equivalent transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in the relevant technical fields, shall similarly be included within the patent protection scope of the present utility model.

Claims

1. A distributed electrical parameter monitoring circuit, characterized in that: It includes a host control circuit and several detection circuits for detecting electrical parameters of various points of the cable, the detection circuit includes a voltage acquisition module, a current acquisition module, a first main control module, a LORA wireless transmission module and a first power extraction module, the input end of the voltage acquisition module and the input end of the current acquisition module are both electrically connected to the cable, the output end of the voltage acquisition module is electrically connected to the voltage input end of the first main control module, the output end of the current acquisition module is connected to the current input end of the first main control module, the output end of the first main control module is electrically connected to the input end of the LORA wireless transmission module, the output end of the LORA wireless transmission module is wirelessly connected to the host control circuit, the input end of the first power extraction module is electrically connected to the cable, and the output end of the first power extraction module is electrically connected to the first main control module and the LORA wireless transmission module respectively.

2. The distributed electrical parameter monitoring circuit according to claim 1, characterized in that: The first power taking module includes a resistor R8, a resistor R9, a capacitor C5, a capacitor C9, a capacitor C11, a voltage regulator ZD1 and a chip U1. The model of the chip U1 is ME6206A25M3G. The first pin of the chip U1 is grounded. The third pin of the chip U1 is electrically connected to the cathode of the voltage regulator ZD1, one end of the capacitor C11, one end of the resistor R9, one end of the resistor R8 and one end of the capacitor C5 respectively. The other end of the capacitor C5 is electrically connected to the other end of the resistor R8, and the other end of the capacitor C5 and the other end of the resistor R8 are both electrically connected to the cable. The other end of the resistor R9 is electrically connected to the other end of the capacitor C11. The second pin of the chip U1 is electrically connected to one end of the capacitor C9 and the power taking input end of the first main control module respectively. The other end of the resistor R9, the other end of the capacitor C11, the anode of the voltage regulator ZD1 and the other end of the capacitor C9 are all grounded.

3. The distributed electrical parameter monitoring circuit according to claim 1, characterized in that: The input end of the current acquisition module is electrically connected to the input end of the first power extraction module, and both are electrically connected to the same coil loop, and are electrically connected to the cable through the coil loop.

4. The distributed electrical parameter monitoring circuit according to claim 3, characterized in that: The coil loop includes a coil connector X2, and the coil connector X2 is electrically connected to the input end of the current acquisition module and the input end of the first power extraction module respectively.

5. The distributed electrical parameter monitoring circuit according to claim 3, characterized in that: It also includes a filter module, the output end of which is electrically connected to the input end of the current acquisition module and the input end of the first power extraction module respectively, and the input end of the filter module is electrically connected to the output end of the coil loop.

6. The distributed electrical parameter monitoring circuit according to claim 5, characterized in that: The filtering module includes a capacitor C10, a rectifier bridge BD1, a capacitor C6, a capacitor C7 and a capacitor C8. The first end of the rectifier bridge BD1 is electrically connected to one end of the capacitor C10, the second end of the rectifier bridge BD1 is electrically connected to the other end of the capacitor C10, the third end of the rectifier bridge BD1 is electrically connected to one end of the capacitor C6, one end of the capacitor C7, one end of the capacitor C8, the input end of the current acquisition module and the input end of the first power extraction module, respectively, the fourth end of the rectifier bridge BD1 is electrically connected to the other end of the capacitor C6 and the other end of the capacitor C7, respectively, and the other end of the capacitor C6, the other end of the capacitor C7 and the other end of the capacitor C8 are all grounded.

7. The distributed electrical parameter monitoring circuit according to claim 1, characterized in that: The voltage acquisition module includes a coil connector X1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a capacitor C2, a capacitor C3, a diode D1, a diode D3, a diode D4, a voltage regulator D2 and a voltage regulator D5. The second end of the coil connector X1 is electrically connected to one end of the resistor R3, one end of the capacitor C1 and one end of the resistor R1 respectively. The other end of the resistor R1 is electrically connected to the cathode of the diode D4, one end of the voltage regulator D5 and the anode of the diode D1 respectively. The cathode of the diode D1 is electrically connected to one end of the capacitor C3 and one end of the voltage regulator D2 respectively. The other end of the voltage regulator D2 is electrically connected to one end of the resistor R4 and one end of the resistor R2 respectively, the other end of the resistor R2 is electrically connected to the cathode of the diode D2, one end of the capacitor C2 and the voltage input end of the first main control module respectively, the first end of the coil connector X1 is electrically connected to the other end of the resistor R3 and the other end of the capacitor C1 respectively, the first end of the coil connector X1, the other end of the resistor R3, the other end of the capacitor C1, the anode of the diode D4, the other end of the voltage regulator D5, the other end of the capacitor C3, the other end of the resistor R4, the anode of the diode D3 and the other end of the capacitor C2 are all grounded.

8. The distributed electrical parameter monitoring circuit according to claim 1, characterized in that: The current acquisition module includes a resistor R5, a resistor R6, a resistor R7, a capacitor C4, a diode D6 and a diode D7, one end of the resistor R7 is electrically connected to the cable, the other end of the resistor R7 is electrically connected to one end of the resistor R6, one end of the capacitor C4, the anode of the diode D6, the cathode of the diode D7 and one end of the resistor R5 respectively, the other end of the resistor R5 is electrically connected to the current input end of the first main control module, the other end of the resistor R6, the other end of the capacitor C4 and the anode of the diode D7 are all grounded, and the cathode of the diode D6 is connected to a 3.3V power supply.

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