Intelligent electricity utilization safety device and intelligent electricity utilization safety measurement system

Abstract

The utility model discloses an intelligent power utilization safety device, which comprises a control module and metering modules in one-to-one correspondence with tested power utilization lines, the metering module comprises a temperature acquisition unit, a current acquisition unit, an electric leakage acquisition unit, a voltage acquisition unit and a metering chip, the temperature acquisition unit, the current acquisition unit and the electric leakage acquisition unit are respectively connected with a measured power utilization circuit, and the voltage acquisition unit is connected with the power utilization input end; all the metering modules share the same voltage acquisition unit; the metering chip is respectively connected with the temperature acquisition unit, the current acquisition unit, the electric leakage acquisition unit and the voltage acquisition unit; and the control module is connected with the metering chip. The intelligent power utilization safety device can monitor the temperature, voltage, current and residual current of a plurality of to-be-detected power utilization lines at the same time, and is suitable for the working condition of a plurality of accessed power utilization devices at present.

Description

Technical Field

[0001] This utility model relates to the field of electrical technology, and in particular to a smart electrical safety device and a smart electrical safety measurement system. Background Technology

[0002] With economic development and rising living standards, various household appliances are entering every household. It is necessary to use electrical safety devices to monitor various data of the tested electrical circuits and measure the electricity of different tested electrical circuits.

[0003] However, current electrical safety devices can only detect data from one circuit being tested. Utility Model Content

[0004] This utility model provides a smart electricity safety device and a smart electricity safety measurement system to achieve data monitoring of multiple tested power lines.

[0005] According to one aspect of this utility model, a smart electricity safety device is provided.

[0006] Includes: a control module and a metering module corresponding to each of the tested power lines;

[0007] The metering module includes a temperature acquisition unit, a current acquisition unit, a leakage current acquisition unit, a voltage acquisition unit, and a metering chip. The temperature acquisition unit, the current acquisition unit, and the leakage current acquisition unit are respectively connected to the power line under test, and the voltage acquisition unit is connected to the power input terminal. All metering modules share the same voltage acquisition unit.

[0008] The metering chip is connected to the temperature acquisition unit, the current acquisition unit, the leakage current acquisition unit, and the voltage acquisition unit, respectively.

[0009] The control module is connected to the metering chip.

[0010] Optionally, the power line under test includes three phase lines: phase A, phase B, and phase C.

[0011] The temperature acquisition unit includes three temperature acquisition subunits: phase A temperature acquisition subunit, phase B temperature acquisition subunit, and phase C temperature acquisition subunit.

[0012] The A-phase temperature acquisition subunit is in contact with the A-phase line and connected to the metering chip;

[0013] The B-phase temperature acquisition subunit is in contact with the B-phase line and connected to the metering chip;

[0014] The C-phase temperature acquisition subunit is in contact with the C-phase line and connected to the metering chip.

[0015] Optionally, the temperature acquisition subunit includes a temperature sensor and a voltage conversion circuit;

[0016] The temperature sensor is in contact with the corresponding phase line and is configured to generate a resistance signal based on the temperature of the corresponding phase line.

[0017] The voltage conversion circuit is connected to the temperature sensor and is configured to generate a temperature voltage signal based on the resistance signal.

[0018] The metering chip is connected to the voltage conversion circuit and is configured to generate a digital signal based on the temperature-voltage signal.

[0019] The control module is used to determine the temperature of the phase line based on the digital signal.

[0020] Optionally, the voltage conversion circuit includes: a first resistor, an anti-static diode, a second resistor, and a first capacitor;

[0021] The first end of the first resistor is connected to a first voltage, the second end of the first resistor is connected to the first end of the temperature sensor, and the second end of the temperature sensor is connected to ground potential;

[0022] The first end of the second resistor is connected to the second end of the first resistor, the second end of the second resistor is connected to the first end of the first capacitor, the second end of the first capacitor is connected to ground potential, and the second end of the second resistor is also connected to the metering chip.

[0023] The first end of the antistatic diode is connected to the second end of the first resistor, and the second end of the antistatic diode is connected to ground potential.

[0024] Optionally, the intelligent power safety device further includes: a power chip, a clock chip, and a clock-power switching circuit; the clock-power switching circuit includes a battery;

[0025] The input terminal of the power chip is connected to the power input terminal and is configured to convert the voltage of the power input terminal into a second voltage required by the clock chip and output it through the first output terminal of the power chip.

[0026] The input terminal of the clock power switching circuit is connected to the first output terminal of the power chip, and the output terminal of the clock power switching circuit is connected to the power supply terminal of the clock chip. The clock power switching circuit is configured to control the second voltage output by the power chip or the voltage output by the battery to power the clock chip; the second voltage is greater than the voltage output by the battery.

[0027] The output of the clock chip is connected to the control module and is configured to provide a clock signal to the control module.

[0028] Optionally, the clock power switching circuit further includes: a first diode, a second diode, a third resistor, and a fourth resistor;

[0029] The first terminal of the first diode is connected to the second voltage, and the second terminal of the first diode is connected to the power supply terminal of the clock chip;

[0030] The first end of the second diode is connected to the second end of the first diode, the second end of the second diode is connected to the first end of the third resistor, the second end of the third resistor is connected to the first end of the battery, the second end of the battery is connected to the first end of the fourth resistor, and the second end of the fourth resistor is connected to ground potential.

[0031] Optionally, the intelligent power safety device further includes: a power chip, a first signal line, a second signal line, an RS485 communication module, and a first RJ11 interface;

[0032] The input terminal of the power chip is connected to the power input terminal. The power chip is configured to convert the voltage of the power input terminal into a third voltage required by the display module and output it through the second output terminal of the power chip.

[0033] The RS485 communication module is connected to the control module;

[0034] The first signal line is connected between the RS485 communication module and the first RJ11 interface;

[0035] The second signal line is connected between the RS485 communication module and the first RJ11 interface;

[0036] The first RJ11 interface is also configured to be connected to the second output terminal of the power chip and to be connected to ground potential;

[0037] The display module is configured to connect to the first RJ11 interface of the smart electricity safety device via its second RJ11 interface.

[0038] Optionally, the intelligent power safety device further includes a relay corresponding to each of the tested power lines, wherein the relay is connected in series in the circuit of the corresponding tested power line;

[0039] The control module is connected to the control terminals of each of the relays.

[0040] The intelligent power safety device also includes a switch input module that corresponds one-to-one with the power line under test.

[0041] The digital input module is configured to detect the continuity of the corresponding circuit of the power line under test.

[0042] Optionally, the intelligent electricity safety device further includes a ferroelectric memory, a flash memory, and an indicator module;

[0043] The ferroelectric memory is connected to the control module;

[0044] The flash memory is connected to the control module;

[0045] The indicator module includes at least two indicator lights, each of which is connected to the control module. The indicator lights are configured to indicate the operating conditions of the smart electricity safety device, with different indicator lights corresponding to different operating conditions.

[0046] According to another aspect of this utility model, a smart electricity safety measurement system is also provided, including the smart electricity safety device described above, an electricity input terminal, and at least two electrical lines to be tested, each of the electrical lines to be tested being connected to the electricity input terminal.

[0047] The intelligent power safety device provided in this embodiment includes at least two metering modules. Each metering module includes a temperature acquisition unit, a current acquisition unit, a leakage current acquisition unit, a voltage acquisition unit, and a metering chip to collect the temperature, current, voltage, and residual current of the corresponding tested power line, thereby realizing power metering and temperature monitoring. The intelligent power safety device can simultaneously monitor the temperature, voltage, current, and residual current of multiple tested power lines, making it suitable for current operating conditions with multiple connected electrical devices and meeting the multifunctional needs of intelligent power safety measurement systems.

[0048] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0049] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0050] Figure 1A hardware structure diagram of a smart electricity safety device provided in an embodiment of this utility model;

[0051] Figure 2 A principle block diagram for temperature acquisition provided for an embodiment of this utility model;

[0052] Figure 3 A circuit diagram of a voltage conversion circuit provided for an embodiment of this utility model;

[0053] Figure 4 A circuit diagram of a clock power switching circuit provided for an embodiment of this utility model;

[0054] Figure 5 A hardware structure diagram of a smart electricity safety device connected to a display module provided for an embodiment of this utility model;

[0055] Figure 6 A hardware structure diagram of a smart electricity safety device connected to a host computer is provided for an embodiment of this utility model;

[0056] Figure 7 A flowchart illustrating the operation of a smart electricity safety device is provided for an embodiment of this utility model.

[0057] Figure 8 This is a schematic diagram of the panel of a smart electricity safety device provided in an embodiment of the present utility model. Detailed Implementation

[0058] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0059] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0060] Figure 1 A hardware structure diagram of a smart electricity safety device provided in an embodiment of this utility model is shown below. Figure 1 The intelligent electricity safety device includes: a control module 1 and a metering module that corresponds one-to-one with the measured power line;

[0061] The metering module includes: a temperature acquisition unit, a current acquisition unit, a leakage current acquisition unit, a voltage acquisition unit, and a metering chip. The temperature acquisition unit, current acquisition unit, and leakage current acquisition unit are respectively connected to the power line under test, and the voltage acquisition unit is connected to the power input terminal. The metering module shares the same voltage acquisition unit.

[0062] The metering chip is connected to the temperature acquisition unit, current acquisition unit, leakage current acquisition unit, and voltage acquisition unit, respectively.

[0063] The control module is connected to the metering chip.

[0064] The temperature acquisition unit includes a temperature sensor configured to acquire the temperature of the circuit under test. The current acquisition unit is configured to acquire the current of the circuit under test. The leakage current acquisition unit is configured to acquire the residual current of the circuit under test. The voltage acquisition unit is configured to acquire the voltage at the power input terminal. The metering chip is configured to measure the power consumption of the circuit under test based on the current and voltage at the power input terminal. The control module is used to acquire the power consumption, temperature, current, residual current, and voltage of the circuit under test through the metering chip. The circuit under test includes three phases (A, B, and C). The current acquisition unit may include multiple current transformers, each corresponding to a phase. The current transformer corresponding to phase A can be installed on phase A to acquire the current of phase A, and the current transformer corresponding to phase B can be installed on phase B to acquire the current of phase B. The leakage current acquisition unit may include only one current transformer, installed on a bus bundle consisting of phases A, B, and C.

[0065] The intelligent electricity safety measurement system is a system that uses intelligent electricity safety devices to monitor various parameters such as temperature, voltage, and current, and calculate electricity consumption. It can be used in power systems. Each tested electrical circuit corresponds to one electrical device. Because different devices have different resistances, the current on the tested electrical circuits for different devices will differ. Each tested electrical circuit is equipped with a current acquisition unit and a leakage current acquisition unit to detect the current and residual current during normal operation. The power input terminal can be the voltage input terminal of the distribution cabinet, used to input 220V AC voltage. The distribution cabinet transmits the voltage input terminal to each electrical circuit to power the electrical devices. Because the tested electrical circuits are connected in parallel, the power supply voltage for each electrical device is the same. Therefore, the intelligent electricity safety device can only set up one voltage acquisition unit, and different tested electrical circuits can share the same voltage acquisition unit. Alternatively, in other embodiments, each tested electrical circuit can be equipped with a separate power acquisition unit.

[0066] In this embodiment, an exemplary intelligent electricity safety measurement system is shown, comprising two tested power lines. Correspondingly, the intelligent electricity safety device includes two metering modules: a first metering module and a second metering module. The first metering module includes a first metering chip 211, a first temperature acquisition unit 212, a first current acquisition unit 213, a first leakage current acquisition unit 214, and a voltage acquisition unit 20. The second metering module includes a second metering chip 221, a second temperature acquisition unit 222, a second current acquisition unit 223, a second leakage current acquisition unit 224, and a voltage acquisition unit 20. The first metering module is used to acquire the temperature, current, voltage, residual current, and power consumption of the first tested power line. The second metering module is used to acquire the temperature, current, voltage, residual current, and power consumption of the second tested power line. The two metering modules support the detection of current, frequency, and power factor of the two tested power lines, as well as the metering of positive and negative active energy and four-quadrant reactive energy. The voltages of the two tested power lines originate from the same voltage source.

[0067] The intelligent power safety device provided in this embodiment includes at least two metering modules. Each metering module includes a temperature acquisition unit, a current acquisition unit, a leakage current acquisition unit, a voltage acquisition unit, and a metering chip to collect the temperature, current, voltage, and residual current of the corresponding tested power line, thereby realizing power metering and temperature monitoring. The intelligent power safety device can simultaneously monitor the temperature, voltage, current, and residual current of multiple tested power lines, making it suitable for current operating conditions with multiple connected electrical devices and meeting the multifunctional needs of intelligent power safety measurement systems.

[0068] Optionally, the power line under test includes three phase lines: phase A, phase B, and phase C.

[0069] The temperature acquisition unit includes three temperature acquisition sub-units: the A-phase temperature acquisition sub-unit, the B-phase temperature acquisition sub-unit, and the C-phase temperature acquisition sub-unit.

[0070] The A-phase temperature acquisition subunit is in contact with the A-phase line and connected to the metering chip;

[0071] The B-phase temperature acquisition subunit is in contact with the B-phase line and connected to the metering chip;

[0072] The C-phase temperature acquisition subunit is in contact with the C-phase line and connected to the metering chip.

[0073] The power transmission line of the tested electrical circuit is a three-phase line, consisting of phases A, B, and C, and a neutral line (N). Correspondingly, a temperature acquisition subunit is set up for each phase line to obtain its temperature. The structures of the phase A, phase B, and phase C temperature acquisition subunits can be identical. A temperature acquisition subunit can be set up on the neutral line (N), or it can be omitted; there is no specific limitation on this. In this embodiment, a temperature acquisition subunit is set up for each phase line of each tested electrical circuit to monitor the temperature, achieving multi-point temperature monitoring. This allows for comprehensive monitoring of temperature changes in the tested electrical circuit, ensuring that any abnormal temperature on any phase line can be detected promptly, enabling timely response to emergencies and preventing faults in the tested electrical circuit.

[0074] Figure 2 A principle block diagram for temperature acquisition provided in this embodiment of the utility model, with reference to... Figure 2 Optionally, the temperature acquisition subunit includes a temperature sensor and a voltage conversion circuit;

[0075] The temperature sensor is in contact with the corresponding phase line, specifically through a bundled contact, and is configured to generate a resistance signal based on the temperature of the corresponding phase line.

[0076] A voltage conversion circuit, connected to a temperature sensor, is configured to generate a temperature voltage signal based on a resistance signal.

[0077] The metering chip, connected to the voltage conversion circuit, is configured to generate a digital signal based on the temperature and voltage signal.

[0078] The control module is used to determine the temperature of the phase line based on the digital signal.

[0079] The A-phase temperature acquisition subunit, B-phase temperature acquisition subunit, and C-phase temperature acquisition subunit have the same structure, all including a temperature sensor and a voltage conversion circuit. Taking the A-phase temperature acquisition subunit in the first metering module as an example, the temperature sensor included in the A-phase temperature acquisition subunit is denoted as A-phase temperature sensor 2121, and the voltage conversion circuit included in the A-phase temperature acquisition subunit is denoted as A-phase voltage conversion circuit 2122. The A-phase temperature sensor 2121 is equivalent to a variable resistor, and its resistance changes with the temperature. Thus, the A-phase temperature sensor 2121 converts the temperature of the A-phase line into a resistance signal. The A-phase voltage conversion circuit 2122 converts the resistance signal into a corresponding temperature voltage signal, i.e., a voltage value, which is input to the corresponding metering chip, i.e., the first metering chip 211. After receiving the temperature voltage signal, the first metering chip 211 generates a corresponding value and transmits it to the control module 1 via the SPI communication bus. The control module then converts the value back into the corresponding resistance and obtains the corresponding temperature by looking up a table and outputs it. The control module 1 stores a table of correspondence between resistance and temperature in advance so that the temperature corresponding to the resistance can be obtained by looking up the table later.

[0080] Figure 3 A circuit diagram of a voltage conversion circuit provided for an embodiment of this utility model is shown below. Figure 3 Optionally, the voltage conversion circuit includes: a first resistor R1, an anti-static diode D0, a second resistor R2, and a first capacitor C1;

[0081] The first end of the first resistor R1 is connected to the first voltage U1, the second end of the first resistor R1 is connected to the first end of the temperature sensor through the first port of the temperature sensor interface J1, and the second end of the temperature sensor is connected to the ground potential, i.e., ground GND, through the second port of the temperature sensor interface J1.

[0082] The first end of the second resistor R2 is connected to the second end of the first resistor R1. The second end of the second resistor R2 is connected to the first end of the first capacitor C1. The second end of the first capacitor C1 is connected to the ground potential, i.e., ground GND. The second end of the second resistor R2 is also connected to the metering chip.

[0083] The first terminal of the anti-static diode D0 is connected to the second terminal of the first resistor R1, and the second terminal of the anti-static diode D0 is connected to the ground potential, i.e., ground GND.

[0084] The first voltage can be the 3.3V output from the power chip of the smart power safety device. The power chip can be a step-down circuit used to convert the voltage at the power input terminal into multiple different target voltages for output, among which the first voltage is included. The power chip can be any existing step-down chip, and no specific limitation is made here.

[0085] The voltage signal ADC_TC1 at the second terminal of the second resistor R2 is obtained by voltage division between the first resistor R1 and the temperature sensor. For example, when the room temperature is 25°C, the resistance of the temperature sensor is 100kΩ. The first voltage U1 passes through the first resistor R1 and the temperature sensor to ground (GND). At this time, the voltage signal ADC_TC1 output from the second terminal of the second resistor R2 is 3.3*(100 / (10+100)) = 3V. By setting an anti-static diode D0, static electricity is conducted to the ground plane when there is static input, protecting subsequent circuits. The second resistor R2 and the first capacitor C1 form a first-order filter to filter out high-order interference signals. In an optional embodiment, the resistance of the first resistor R1 is 10KΩ, the resistance of the second resistor R2 is 1KΩ, the capacitance of the first capacitor C1 is 0.1μF, and D0 uses a JEB05DC chip.

[0086] This embodiment exemplifies a method for obtaining the temperature of the phase line, as follows:

[0087] Short-circuit the temperature sensor interface J1, record the digital value output by the metering chip at this time, and store it in the flash memory of the smart electricity safety device;

[0088] Connect the temperature sensor interface J1 to a 100kΩ resistor, record the digital value output by the metering chip at this time, and store it in the flash memory.

[0089] Disconnect the temperature sensor interface J1, record the digital value output by the metering chip at this time, and store it in the flash memory.

[0090] Read real-time temperature and voltage signals from inside the metering chip.

[0091] The resistance value is calculated based on the current temperature and voltage signal and the three previously calibrated and stored calibration values.

[0092] The control module stores a table mapping temperature to resistance. The temperature range is then looked up in the list based on the current resistance value.

[0093] The precise temperature is calculated based on the ratio.

[0094] Compared to directly transmitting temperature and voltage values ​​to the control module, this embodiment uses a metering chip to read the temperature and voltage values. Because the resolution of the metering chip is greater than that of the control module, the measurement accuracy can be increased. Additionally, an anti-static diode, a second resistor, and a first capacitor are included to increase interference immunity.

[0095] Continue to refer to Figure 1 Optionally, the intelligent power safety device also includes: a power chip, a clock chip 3, and a clock-power switching circuit 4; the clock-power switching circuit 4 includes a battery.

[0096] The input terminal of the power supply chip is connected to the power input terminal and is configured to convert the voltage of the power input terminal into a second voltage required by the clock chip and output it through the first output terminal of the power supply chip;

[0097] The input terminal of the clock power switching circuit 4 is connected to the first output terminal of the power chip, and the output terminal of the clock power switching circuit 4 is connected to the power supply terminal VRTC of the clock chip 3. The clock power switching circuit 4 is configured to control the second voltage output by the power chip or the voltage output by the battery to power the clock chip 3.

[0098] The output of clock chip 3 is connected to control module 1 and is configured to provide clock signals to control module 1.

[0099] The power supply chip includes multiple output terminals, each used to output a different target voltage. These target voltages include a first voltage and a second voltage. Optionally, the second voltage U2 is equal to the first voltage U1, both being 3.3V. The main function of the clock chip 3 is to provide an accurate clock signal to the control module. Regardless of whether the main circuit has power, the clock chip 3 must always have power to ensure it is always operational. Therefore, a clock power switching circuit 4 is provided. When the main circuit has voltage output (i.e., the power supply chip can output the second voltage), the second voltage is used to power the clock chip 3. When the power supply chip is not working and cannot output the second voltage, a battery is used to power the clock chip 3.

[0100] Based on the above embodiments, a specific circuit diagram of a clock power switching circuit is provided. Figure 4 A circuit diagram of a clock power switching circuit provided for an embodiment of this utility model is shown below. Figure 1 and Figure 4 Optionally, the clock power switching circuit also includes: a first diode D1, a second diode D2, a third resistor R3, and a fourth resistor R4;

[0101] The first terminal of the first diode D1 is connected to the first output terminal of the power chip to access the second voltage U2, and the second terminal of the first diode D1 is connected to the power supply terminal VRTC of the clock chip 3.

[0102] The first terminal of the second diode D2 is connected to the second terminal of the first diode D1. The second terminal of the second diode D2 is connected to the first terminal of the third resistor R3. The second terminal of the third resistor R3 is connected to the first terminal of the battery 41. The second terminal of the battery 41 is connected to the first terminal of the fourth resistor R4. The second terminal of the fourth resistor R4 is connected to the ground potential, i.e., grounded GND.

[0103] The first diode D1 has its first terminal as the anode and its second terminal as the cathode, and the second diode D2 has its first terminal as the anode and its second terminal as the cathode. Battery 41 can be a lithium battery, a rechargeable battery, or other types of battery; no specific limitation is made. The first terminal of battery 41 is the positive terminal, and the second terminal is the negative terminal.

[0104] The second voltage U2 is greater than the voltage output by battery 41. For example, the second voltage is 3.3V, and the voltage of battery 41 is 3.2V. When the main circuit power supply is available, the second voltage U2 powers the clock chip 3 through the first diode D1. At this time, because the second voltage U2 is greater than the voltage of battery 41, the second diode D2 is cut off, so battery 41 does not output voltage. When there is no voltage in the main circuit, the first diode D1 is cut off, and the second diode D2 is turned on, at which point battery 41 powers the clock chip 3. This ensures that the clock chip is always powered and works normally, and will not stop working due to power failure.

[0105] Figure 5 A hardware structure diagram of a smart electricity safety device connected to a display module is provided for an embodiment of this utility model, with reference to... Figure 1 and Figure 5 Optionally, the intelligent power safety measurement system also includes a display module 80, and the intelligent power safety device also includes: a power chip 5, a first signal line L1, a second signal line L2, an RS485 communication module 6, and a first RJ11 interface 7.

[0106] The input terminal of the power chip 5 is connected to the power input terminal. The power chip 5 is configured to convert the voltage of the power input terminal into the third voltage required by the display module 80 and output it through the second output terminal of the power chip 5.

[0107] RS485 communication module 6 is connected to control module 1;

[0108] The first signal line L1 is connected between the RS485 communication module and the first RJ11 interface 7;

[0109] The second signal line L1 is connected between the RS485 communication module 6 and the first RJ11 interface 7;

[0110] The first RJ11 interface 7 is also configured to connect to the second output terminal of the power chip and to be connected to ground potential;

[0111] The display module 80 is configured to connect to the first RJ11 interface 7 of the smart electricity safety device via its own second RJ11 interface 101.

[0112] In this embodiment, the power chip 5 is configured to step down the voltage at the power input terminal and convert it into three target voltages for output. One target voltage is the first voltage required by the voltage conversion circuit, another target voltage is the second voltage required by the clock power switching circuit 4, and the third target voltage is the third voltage required by the display module 80. The third voltage can be 5V.

[0113] Both the first RJ11 interface 7 included in the smart power safety device and the second RJ11 interface included in the display module 80 have four pins. Two pins of the first RJ11 interface 7 are used to connect to the first signal line L1 and the second signal line L2, the third pin is used to connect to the third voltage output by the power chip, and the fourth pin is used to connect to ground. The control module 1 transmits data to the RS485 communication module 6 through the UART interface. The RS485 communication module 6 converts the signal into a differential signal and transmits it to the first signal line L1 and the second signal line L2. The first signal line L1 and the second signal line L2 are connected to the communication line L3 through the first RJ11 interface 7, and communicate with the display module 80 through the communication line L3. In addition to transmitting the 485 signal, the first RJ11 interface 7 also includes a 5V power supply and a ground wire, so the display module 80 can draw power from the smart power safety device through the communication line L3, without needing to supply power to the display module 80 separately.

[0114] In addition, the smart electricity safety device can also communicate with the host computer via the RJ11 interface, see details below. Figure 6 , Figure 6 A hardware structure diagram of a smart electricity safety device connected to a host computer is provided for an embodiment of this utility model, with reference to... Figure 1 and Figure 6 Since the host computer 90 has its own power supply, it does not need to draw power from the smart power safety device. The host computer 90 only needs to connect its own RS485 interface 201 to the two pins of the first RJ11 interface 7 of the smart power safety device, which connect to the first signal line L1 and the second signal line L2. The first RJ11 interface 7 is connected to the RS485 interface 201 of the host computer via the communication line L3 to communicate with the host computer 90.

[0115] Continue to refer to Figure 1 Optionally, the smart electricity safety device also includes a relay 8 that corresponds one-to-one with the tested power line, and the relay 8 is connected in series in the circuit of the corresponding tested power line.

[0116] Control module 1 is connected to the control terminals of each relay.

[0117] This embodiment exemplarily shows that the smart power safety device includes two relays. The relay 8 is configured to control the on / off state of the corresponding power line under test, that is, to control the on / off state of external devices.

[0118] Continue to refer to Figure 1 Optionally, the intelligent power safety device also includes a switch input module 9 that corresponds one-to-one with the power line being tested;

[0119] The digital input module 9 is configured to detect the continuity of the corresponding circuit of the electrical circuit under test.

[0120] In this embodiment, the exemplary output includes two switch input modules 9. The switch input modules 9 are configured to detect the continuity of the corresponding circuit of the tested power line, so that the control module 1 can implement linkage control of the tested power line. For example, when the switch input module 9 detects that the first external device is connected, the control module 1 controls the tested power line containing the second external device to be connected, so as to realize the linkage control of the first external device and the second external device.

[0121] Continue to refer to Figure 1 Optionally, the smart electricity safety device also includes a ferroelectric memory 10, a flash memory 11, and an indicator module 12;

[0122] The ferroelectric memory 10 is connected to the control module 1;

[0123] Flash memory 11 is connected to control module 1;

[0124] The indicator module 12 includes at least two indicator lights, each of which is connected to the control module 1. The indicator lights are configured to indicate the operating conditions of the smart power safety device. Different indicator lights correspond to different operating conditions, and the operating conditions include at least fault conditions and normal operating conditions.

[0125] Ferroelectric memory 10: mainly used for storing electrical energy data and other data that needs to be frequently read and written.

[0126] Flash memory 11: In conjunction with ferroelectric memory 10, it is mainly used to store data with a large amount of data but a low storage frequency.

[0127] The indicator module 12 includes eight indicator lights, namely:

[0128] Operation light: Used to flash at a certain frequency when the smart electricity safety device is operating normally;

[0129] Fault indicator: Used to flash when at least one parameter of the smart electricity safety device exceeds the normal value range;

[0130] Communication light: Used to flash during Ethernet communication between the smart power safety device and the client;

[0131] Alarm light: Used to flash when at least one parameter of the smart electricity safety device is about to exceed the normal value range;

[0132] Indicator light: Used to flash when the smart power safety device is connected to its own Ethernet module 13;

[0133] The sensor light flashes when the smart electrical safety device acquires one of the following: temperature, current, voltage, or residual current.

[0134] First-channel optical pulse lamp: used to flash when there is voltage and current in the first-channel tested power line;

[0135] Second-channel optical pulse lamp: used to flash when there is voltage and current in the second-channel tested circuit.

[0136] This embodiment only shows that the indicator module 12 includes 8 indicator lights, but in other embodiments it is not limited to the above 8 indicator lights.

[0137] In this embodiment, the control module 1 is used to communicate with the outside world through the RS485 communication module, store electrical energy data, control the display of LED lights, read data such as voltage, current, power, and frequency from the two metering chips, detect switch inputs, detect temperature, and control relay outputs.

[0138] Figure 7 A flowchart illustrating the operation of a smart electricity safety device is provided for an embodiment of this utility model. (Refer to...) Figure 7 Optional, the workflow includes:

[0139] S110: Connect each temperature acquisition subunit, current acquisition unit, voltage acquisition unit, and leakage current acquisition unit to the calibration source, and control the calibration source to output calibration voltage, current, and phase.

[0140] The calibration voltage is 220V, the calibration current is 5A, the calibration phase is 0.5L, the calibration residual current is 1A, and the resistance corresponding to the calibration temperature is 100KΩ.

[0141] S120: The host computer sends a calibration command.

[0142] The host computer sends calibration commands to control module 1 via the Modbus protocol.

[0143] S130: Calibrate the voltage gain and phase of one channel.

[0144] S140: Calibrate the current gain and phase of both channels.

[0145] S150: Calibrate the residual current gain of both channels.

[0146] S160: Calibrates six-channel temperature gain.

[0147] After receiving the command, the control module reads the current amplitude and phase values ​​of voltage and current, as well as the current amplitude of residual current and temperature from the metering chip. It then calculates the amplitude gain and phase deviation of each parameter.

[0148] S170: The amplitude gain and phase deviation of each parameter are written to the metering chip and the external Flash memory.

[0149] This utility model embodiment also provides a schematic diagram of the panel structure of a smart electricity safety device. Figure 8 A schematic diagram of a smart electricity safety device provided in an embodiment of this utility model is shown below. Figure 8 100 is a two-channel relay output interface; 200 is the first four channels of temperature quick-connect interface; 300 is the first RJ11 display output interface or RS485 output interface; 400 is a digital input interface; 500 is an Ethernet communication interface; 600 is the first channel of current and residual current quick-connect interface, where the pins in the first to third columns are the three-phase current input and output pins (A, B, C), and the fourth column is the residual current pin; 700 is the second channel of current and residual current quick-connect interface, where the pins in the first to third columns are the three-phase current input and output pins (A, B, C), and the fourth column is the residual current pin; 800 is the fifth and sixth channels of temperature interface; 900 is an auxiliary power interface; 1000 is a power input terminal interface; 1100 is an indicator light interface, including the eight indicator lights mentioned above.

[0150] Optionally, the smart electricity safety device also includes a circuit board. In the smart electricity safety devices described in the above examples, all modules or components are integrated onto the circuit board. An adhesive layer is provided between the components on the circuit board, and a panel is disposed outside the circuit board. An encapsulation process is used to fill the panel with adhesive to protect the critical circuit components of the circuit board from environmental humidity and gas corrosion.

[0151] This utility model also provides a smart electricity safety measurement system, including the smart electricity safety device of any of the above embodiments, an electricity input terminal, and at least two tested power lines, each of which is connected to the electricity input terminal. The smart electricity safety device includes a metering module corresponding to each tested power line to measure the parameters of the tested power lines.

[0152] It should be understood that the various forms of the process shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this utility model can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this utility model can be achieved, and this is not limited herein.

[0153] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A smart electricity safety device, Its features are, Includes: a control module and a metering module that corresponds one-to-one with the power line being tested; The metering module includes a temperature acquisition unit, a current acquisition unit, a leakage current acquisition unit, a voltage acquisition unit, and a metering chip. The temperature acquisition unit, the current acquisition unit, and the leakage current acquisition unit are respectively connected to the power line under test, and the voltage acquisition unit is connected to the power input terminal. All metering modules share the same voltage acquisition unit. The metering chip is connected to the temperature acquisition unit, the current acquisition unit, the leakage current acquisition unit, and the voltage acquisition unit, respectively. The control module is connected to the metering chip.

2. The intelligent electricity safety device according to claim 1, characterized in that, The power line under test includes three phase lines: phase A, phase B, and phase C. The temperature acquisition unit includes three temperature acquisition subunits: phase A temperature acquisition subunit, phase B temperature acquisition subunit, and phase C temperature acquisition subunit. The A-phase temperature acquisition subunit is in contact with the A-phase line and connected to the metering chip; The B-phase temperature acquisition subunit is in contact with the B-phase line and connected to the metering chip; The C-phase temperature acquisition subunit is in contact with the C-phase line and connected to the metering chip.

3. The intelligent electricity safety device according to claim 2, characterized in that, The temperature acquisition subunit includes a temperature sensor and a voltage conversion circuit; The temperature sensor is in contact with the corresponding phase line and is configured to generate a resistance signal based on the temperature of the corresponding phase line. The voltage conversion circuit is connected to the temperature sensor and is configured to generate a temperature voltage signal based on the resistance signal. The metering chip is connected to the voltage conversion circuit and is configured to generate a digital signal based on the temperature-voltage signal. The control module is used to determine the temperature of the phase line based on the digital signal.

4. The intelligent electricity safety device according to claim 3, characterized in that, The voltage conversion circuit includes: a first resistor, an anti-static diode, a second resistor, and a first capacitor; The first end of the first resistor is connected to a first voltage, the second end of the first resistor is connected to the first end of the temperature sensor, and the second end of the temperature sensor is connected to ground potential; The first end of the second resistor is connected to the second end of the first resistor, the second end of the second resistor is connected to the first end of the first capacitor, the second end of the first capacitor is connected to ground potential, and the second end of the second resistor is also connected to the metering chip. The first end of the antistatic diode is connected to the second end of the first resistor, and the second end of the antistatic diode is connected to ground potential.

5. The intelligent electricity safety device according to claim 1, characterized in that, Also includes: Power supply chip, clock chip, and clock-power switching circuit; The clock power switching circuit includes a battery; The input terminal of the power chip is connected to the power input terminal and is configured to convert the voltage of the power input terminal into a second voltage required by the clock chip and output it through the first output terminal of the power chip. The input terminal of the clock power switching circuit is connected to the first output terminal of the power chip, and the output terminal of the clock power switching circuit is connected to the power supply terminal of the clock chip. The clock power switching circuit is configured to control the second voltage output by the power chip or the voltage output by the battery to power the clock chip. The second voltage is greater than the voltage output by the battery; The output of the clock chip is connected to the control module and is configured to provide a clock signal to the control module.

6. The intelligent electricity safety device according to claim 5, characterized in that, The clock power switching circuit also includes: a first diode, a second diode, a third resistor, and a fourth resistor; The first terminal of the first diode is connected to the second voltage, and the second terminal of the first diode is connected to the power supply terminal of the clock chip; The first end of the second diode is connected to the second end of the first diode, the second end of the second diode is connected to the first end of the third resistor, the second end of the third resistor is connected to the first end of the battery, the second end of the battery is connected to the first end of the fourth resistor, and the second end of the fourth resistor is connected to ground potential.

7. The intelligent electricity safety device according to claim 1, characterized in that, The intelligent power safety device also includes: a power chip, a first signal line, a second signal line, an RS485 communication module, and a first RJ11 interface; The input terminal of the power chip is connected to the power input terminal. The power chip is configured to convert the voltage of the power input terminal into a third voltage required by the display module and output it through the second output terminal of the power chip. The RS485 communication module is connected to the control module; The first signal line is connected between the RS485 communication module and the first RJ11 interface; The second signal line is connected between the RS485 communication module and the first RJ11 interface; The first RJ11 interface is also configured to be connected to the second output terminal of the power chip and to be connected to ground potential; The display module is configured to connect to the first RJ11 interface of the smart electricity safety device via its second RJ11 interface.

8. The intelligent electricity safety device according to claim 1, characterized in that, It also includes relays that correspond one-to-one with the electrical circuit under test, and the relays are connected in series in the circuit of the corresponding electrical circuit under test; The control module is connected to the control terminals of each of the relays; The intelligent power safety device also includes a switch input module that corresponds one-to-one with the power line under test. The digital input module is configured to detect the continuity of the corresponding circuit of the power line under test.

9. The intelligent electricity safety device according to claim 1, characterized in that, It also includes ferroelectric memory, flash memory and indicator module; The ferroelectric memory is connected to the control module; The flash memory is connected to the control module; The indicator module includes at least two indicator lights, each of which is connected to the control module. The indicator lights are configured to indicate the operating conditions of the smart electricity safety device, with different indicator lights corresponding to different operating conditions.

10. A smart electricity safety measurement system, characterized in that, It includes the smart electricity safety device as described in any one of claims 1-9, an electricity input terminal, and at least two tested power lines, each of which is connected to the electricity input terminal.

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