A portable power consumption detection device for detecting battery of electric meter

Abstract

The utility model provides a portable power consumption detection device for detecting an electric meter battery. The detection device is provided with a shell, a detection circuit is integrated in the shell, a display screen, a battery socket, and a battery pin are provided on the shell, and the detection circuit includes a power module, an acquisition module, and a signal processing and display module. In the process of detecting the battery power consumption of the electric meter, it is not necessary to connect the multimeter in series to the battery circuit by flying wires of the battery socket, and it is not necessary to cut and disconnect the circuit in the battery power supply circuit. The detection can be completed by a simple and convenient direct plug-in method, and the original electric meter circuit will not be damaged. The battery voltage and battery power consumption can be detected in real time when the electric meter is in normal operation, and it can be judged whether it is in an abnormal state. In this way, rapid detection is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of electric meter detection, and in particular to a portable power consumption detection device for detecting an electric meter battery. Background Art

[0002] Functions such as energy metering, timed freezing, and load recording are important components of smart energy meters, and these functions are inseparable from the normal power supply of the meter battery. At present, in the design scheme of the State Grid meter, the battery generally has two uses, namely as a backup working power supply and a clock battery. When the meter is in a normal power supply state, the battery only supplies power to its clock module; when the meter is in a power-off state, as a backup working power supply, the battery must simultaneously supply power to modules such as the clock chip, MCU chip, and metering chip. Once the battery is in an undervoltage state, it cannot provide normal power supply to the meter, which will cause related faults such as metering and timing errors, causing great trouble to the power supply bureau and customers. The reasons for battery undervoltage can be divided into two types, one is the incoming material problem of the battery itself, and the other is the design defect of the battery power supply circuit of the meter itself. For the battery undervoltage meters returned by the market, technical support and R&D personnel cannot directly determine the source of the fault problem by visual inspection, and often need to be detected through external electronic wires and other steps.

[0003] In the prior art, when detecting the battery power consumption of an electric meter, there are usually two methods due to the special structure of the meter battery. Method one is to connect the multimeter in series to the battery circuit in the form of flying wires at the battery socket of the electric meter to detect the battery power consumption of the electric meter. However, the connection method involved in this detection method is relatively cumbersome. Method two is to cut off the circuit in the battery power supply circuit of the electric meter and connect the multimeter in series for measurement. However, this method also requires circuit recovery later. The above two methods are cumbersome to operate and have low detection efficiency. Therefore, it is necessary to design a portable battery power consumption detection device to facilitate technicians to detect the power supply function and power consumption of the electric meter battery on site. Utility Model Content

[0004] In order to solve the above technical problems, the present application provides a portable power consumption detection device for detecting an electric meter battery, comprising a shell, in which a detection circuit is integrated, the detection circuit comprises a power module, an acquisition module, and a signal processing and display module, one end of the signal processing module is electrically connected to the power module, and the other end is electrically connected to the acquisition module; the power module is used to provide power for the remaining modules; the acquisition module is used to collect the current signal of the electric meter battery and transmit the collected current signal to the signal processing and display module; the signal processing and display module is used to process the received current signal into a digital signal and display the digital signal.

[0005] In some embodiments of the present application, the power module includes a battery, a three-terminal voltage regulator U3, a 555 timer chip U2, a key switch K1, electrolytic capacitors C9, C10, C11, diodes D1, D2, capacitors C6, C7, C8, resistors R2, R3, R8, and an LED indicator D3; one end of the key switch K1 is electrically connected to the positive electrode of the battery, and the other end is electrically connected to the VI pin of the three-terminal voltage regulator U3 and one end of the capacitor C8; the other end of the capacitor C8 is grounded; the VO pin of the three-terminal voltage regulator U3 is electrically connected to one end of the resistor R2, one end of the resistor R3, the positive electrode of the electrolytic capacitor C9, the R pin and the VCC pin of the 555 timer chip U2; the GND pin of the three-terminal voltage regulator U3 is grounded; the other end of the resistor R2 is electrically connected to the positive electrode of the LED indicator D3; the other end of the resistor R3 is electrically connected to the DC pin of the 555 timer chip U2; The negative electrode of the electrolytic capacitor C9 is grounded; the negative electrode of the LED indicator D3 is grounded; the CV pin of the 555 timer chip U2 is electrically connected to one end of the capacitor C6; the TR pin of the 555 timer chip U2 is connected to the TH pin, and is also electrically connected to one end of the resistor R8 and one end of the capacitor C7; the Q pin of the 555 timer chip U2 is electrically connected to the positive electrode of the electrolytic capacitor C10; the other end of the capacitor C6 is grounded; the other end of the resistor R8 is electrically connected to the DC pin of the 555 timer chip U2; the other end of the capacitor C7 is grounded; the negative electrode of the electrolytic capacitor C10 is electrically connected to the negative electrode of the diode D1 and the positive electrode of the diode D2; the negative electrode of the diode D2 is grounded; the positive electrode of the electrolytic capacitor C11 is grounded; the positive electrode of the diode D1, the negative electrode of the electrolytic capacitor C11, and the VO pin of the three-terminal regulator U3 are electrically connected to the signal processing display module.

[0006] In some embodiments of the present application, the acquisition module includes a connection port, a battery interface, an amplifier chip U5, a knob switch SW1, and resistors R4, R10, R11, R12, R13, R14, R15, and R16; the connection port includes a connection port - and a connection port +; the battery interface includes a battery interface + and a battery interface -; the battery interface + and the battery interface - are electrically connected to the battery of the meter to be tested; the battery interface - is electrically connected to the connection port -; the connection port - and the connection port + are electrically connected to the original battery interface of the meter to be tested; the connection port + is electrically connected to one end of the resistor R13; the other end of the resistor R13 is electrically connected to the 20mA position of the knob switch SW1 and one end of the resistor R4; the other end of the resistor R4 It is electrically connected to the 2mA position of the knob switch SW1 and one end of the resistor R10; the other end of the resistor R10 is electrically connected to the 200μA position of the knob switch SW1 and one end of the resistor R12; the other end of the resistor R12 is electrically connected to the 20μA position of the knob switch SW1 and one end of the resistor R11; the other end of the resistor R11 is electrically connected to the 2μA position of the knob switch SW1 and the in-phase input end of the amplifier chip U4; the inverting input end of the amplifier chip U4 is electrically connected to the resistor R14 and one end of the resistor R16, and the output end of the amplifier chip U4 is electrically connected to the other end of the resistor R14 and one end of the resistor R15; the other end of the resistor R16 is grounded; the other end of the resistor R15 is grounded.

[0007] In some embodiments of the present application, the signal processing display module includes an I CL7107 chip U1, a reset button switch K2, digital tubes LED1, LED2, LED3, LED4, capacitors C1, C2, C3, C4, C5, resistors R1, R5, R6, R7, R9, and a variable resistor RV1; the OSC1 pin of the I CL7107 chip U1 is electrically connected to one end of the resistor R6 and one end of the capacitor C1; the other end of the resistor R6 is electrically connected to the OSC2 pin of the I CL7107 chip U1; the other end of the capacitor C1 is electrically connected to the OSC3 pin of the I CL7107 chip U1; the TEST pin of the I CL7107 chip U1 is electrically connected to one end of the reset button switch K2; the other end of the reset button switch K2 is electrically connected to the V+ pin of the I CL7107 chip U1; the I The VREF-pin of the CL7107 chip U1 is electrically connected to the first end pin of the variable resistor RV1; the middle pin of the variable resistor RV1 is electrically connected to the VREF+ pin of the CL7107 chip U1, and the second end pin of the variable resistor RV1 is electrically connected to one end of the resistor R5; the other end of the resistor R5 is electrically connected to the V+ pin of the CL7107 chip U1; the CREF-pin of the CL7107 chip U1 is electrically connected to one end of the capacitor C2; the other end of the capacitor C2 is electrically connected to the CREF+ pin of the CL7107 chip U1; one end of the capacitor C3 and one end of the capacitor C4 are electrically connected to one end of the capacitor R7, the other end of the capacitor C3 is electrically connected to the VI NT pin of the CL7107 chip U1, and the other end of the capacitor C4 is electrically connected to the CAZ pin of the CL7107 chip U1; the other end of the resistor R7 is electrically connected to the I CL7107 chip U1. The VBUFF pin of the I CL7107 chip U1 is electrically connected; the ACOM pin of the I CL7107 chip U1 is electrically connected to one end of the capacitor C5; the other end of the capacitor C5 and one end of the resistor R9 are electrically connected to the VI N+ pin of the I CL7107 chip U1, the A1-G1, A2-G2, A3-G3 pins of the I CL7107 chip U1 are electrically connected to the D1-D21 pins of the digital tubes LED2, LED3, and LED4; the AB4 pin of the I CL7107 chip U1 is electrically connected to the D22 pin of the digital tube LED1, and the POL pin of the I CL7107 chip U1 is electrically connected to the D23 pin of the digital tube LED1.

[0008] In some embodiments of the present application, a display screen is provided on the upper surface of the shell, a gear knob is provided below the display screen, and a battery socket, a full display button and a power switch button are provided below the gear knob; a battery pin is provided on the top surface of the shell, and the display screen, gear knob, battery socket, full display button, power switch button and battery pin are all electrically connected to the detection circuit.

[0009] Compared with the prior art, the utility model has the following advantages and beneficial effects: the portable power consumption detection device for detecting the battery of an electric meter of the present application is provided with a shell, a detection circuit is integrated in the shell, a display screen, a battery socket, and a battery pin are provided on the shell, and the detection circuit includes a power module, an acquisition module, and a signal processing and display module. In the process of detecting the battery power consumption of the electric meter, there is no need to connect the multimeter in series to the battery circuit by flying wires in the battery socket, and there is no need to cut and disconnect the circuit in the battery power supply circuit. The detection can be completed by a simple and convenient direct plug-in method, and the original electric meter circuit will not be damaged. The battery voltage and battery power consumption can be detected in real time when the electric meter is in normal operation, and it can be determined whether it is in an abnormal state. In this way, rapid detection is achieved.

[0010] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accompanying drawings constituting a part of this document are used to provide a further understanding of this document. The exemplary embodiments and descriptions of this document are used to explain this document and do not constitute an improper limitation on this document. In the accompanying drawings:

[0012] Figure 1 is a schematic diagram of a current detection method provided by an exemplary embodiment of the present application;

[0013] Figure 2 It is a structural schematic diagram of a portable power consumption detection device for detecting an electric meter battery provided by an exemplary embodiment of the present application;

[0014] Figure 3 It is a schematic diagram of the back structure of a portable power consumption detection device for detecting an electric meter battery provided by an exemplary embodiment of the present application.

[0015] In the figure:

[0016] 1. Power indicator light; 2. Display screen; 3. Battery pin; 4. Shift knob; 5. Battery socket; 6. Full display button; 7. Power switch button; 8. Battery box. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application. It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other arbitrarily.

[0018] In the prior art, when detecting the battery power consumption of an electric meter, there are usually two methods due to the special structure of the meter battery. Method one is to connect the multimeter in series to the battery circuit in the form of flying wires at the battery socket of the electric meter to detect the battery power consumption of the electric meter. However, the connection method involved in this detection method is relatively cumbersome. Method two is to cut off the circuit in the battery power supply circuit of the electric meter and connect the multimeter in series for measurement. However, this method also requires circuit recovery later. The above two methods are cumbersome to operate and have low detection efficiency. Therefore, it is necessary to design a portable battery power consumption detection device to facilitate technicians to detect the power supply function and power consumption of the electric meter battery on site.

[0019] Based on this, an exemplary embodiment of the present application provides a portable power consumption detection device for detecting an electric meter battery, wherein a shell is provided in the detection device, a detection circuit is integrated in the shell, a display screen, a battery socket, and a battery pin are provided on the shell, and the detection circuit includes a power module, an acquisition module, and a signal processing and display module. In the process of detecting the battery power consumption of the electric meter, there is no need to connect the multimeter in series with the battery circuit by flying wires in the battery socket, nor is there any need to cut and disconnect the circuit in the battery power supply circuit. The detection can be completed by a simple and convenient direct plug-in method, and the original electric meter circuit will not be damaged. The battery voltage and battery power consumption can be detected in real time when the electric meter is in normal operation, and it can be determined whether it is in an abnormal state. In this way, rapid detection is achieved.

[0020] An exemplary embodiment of the present application provides a portable power consumption detection device for detecting a battery of an electric meter. The detection device includes a housing, and a detection circuit is integrated in the housing, such as Figure 1 As shown, the detection circuit includes a power module, an acquisition module, and a signal processing and display module. One end of the signal processing module is electrically connected to the power module, and the other end is electrically connected to the acquisition module. The power module is used to provide power for the remaining modules. The acquisition module is used to collect the current signal of the meter battery and transmit the collected current signal to the signal processing and display module. The signal processing and display module is used to process the received current signal into a digital signal and display the digital signal.

[0021] The power module includes a battery, a three-terminal voltage regulator U3, a 555 timer chip U2, a key switch K1, electrolytic capacitors C9, C10, C11, diodes D1, D2, capacitors C6, C7, C8, resistors R2, R3, R8, and an LED indicator D3; one end of the key switch K1 is electrically connected to the positive pole of the battery, and the other end is electrically connected to the VI pin of the three-terminal voltage regulator U3 and one end of the capacitor C8; the other end of the capacitor C8 is grounded; the VO pin of the three-terminal voltage regulator U3 is electrically connected to one end of the resistor R2, one end of the resistor R3, the positive pole of the electrolytic capacitor C9, the R pin of the 555 timer chip U2, and the VCC pin; the GND pin of the three-terminal voltage regulator U3 is grounded; the other end of the resistor R2 is electrically connected to the positive pole of the LED indicator D3; the other end of the resistor R3 is electrically connected to the DC pin of the 555 timer chip U2 ; The negative electrode of the electrolytic capacitor C9 is grounded; The negative electrode of the LED indicator D3 is grounded; The CV pin of the 555 timer chip U2 is electrically connected to one end of the capacitor C6; The TR pin of the 555 timer chip U2 is connected to the TH pin, and is also electrically connected to one end of the resistor R8 and one end of the capacitor C7; The Q pin of the 555 timer chip U2 is electrically connected to the positive electrode of the electrolytic capacitor C10; The other end of the capacitor C6 is grounded; The other end of the resistor R8 is electrically connected to the DC pin of the 555 timer chip U2; The other end of the capacitor C7 is grounded; The negative electrode of the electrolytic capacitor C10 is electrically connected to the negative electrode of the diode D1 and the positive electrode of the diode D2; The negative electrode of the diode D2 is grounded; The positive electrode of the electrolytic capacitor C11 is grounded; The positive electrode of the diode D1, the negative electrode of the electrolytic capacitor C11, and the VO pin of the three-terminal regulator U3 are electrically connected to the signal processing display module.

[0022] The positive pole of the battery is electrically connected to the VI input terminal of the three-terminal voltage regulator U3. The output terminal VO of the three-terminal voltage regulator U3 outputs a 5V voltage to power the I CL7107 chip U1, the 555 timer chip U2, the amplifier chip U4 and the digital tube LED1-4. At the same time, the output terminal VO of the three-terminal voltage regulator U3 is connected to the positive pole of the LED indicator D3 through the current limiting resistor R2 to detect the power supply status. The -5V voltage required by the I CL7107 chip U1 in this circuit is generated based on the astable circuit composed of the timer NE555 chip U2, resistors R2, R8, capacitors C6, and C7. The NE555 is connected as an astable multivibrator with an operating frequency of about 1KHz. It outputs a square wave through the pin Q. In the positive half of the square wave, the capacitor C10 is charged through the diode D2. When the output of the NE555 is zero, C10 is discharged through the diode D2, and the capacitor C11 is charged. The voltage at the junction of the anode of D1 and the cathode of C11 will always be a negative voltage output relative to the ground. The model of the three-terminal voltage regulator may be LM7805, which can provide a DC-5V output voltage and includes overcurrent and overload protection circuits.

[0023] The acquisition module includes a connection port, a battery interface, an amplifier chip U5, a knob switch SW1, resistors R4, R10, R11, R12, R13, R14, R15, and R16; the connection port includes a connection port - and a connection port +; the battery interface includes a battery interface + and a battery interface -; the battery interface + and the battery interface - are electrically connected to the battery of the meter to be tested; the battery interface - is electrically connected to the connection port -; the connection port - and the connection port + are electrically connected to the original battery interface of the meter to be tested; the connection port + is electrically connected to one end of the resistor R13; the other end of the resistor R13 is electrically connected to the 20mA gear of the knob switch SW1 and one end of the resistor R4; the other end of the resistor R4 is electrically connected to the knob switch SW 1 and one end of the resistor R10 are electrically connected; the other end of the resistor R10 is electrically connected to the 200μA position of the knob switch SW1 and one end of the resistor R12; the other end of the resistor R12 is electrically connected to the 20μA position of the knob switch SW1 and one end of the resistor R11; the other end of the resistor R11 is electrically connected to the 2μA position of the knob switch SW1 and the non-inverting input end of the amplifier chip U4; the inverting input end of the amplifier chip U4 is electrically connected to the resistor R14 and one end of the resistor R16, and the output end of the amplifier chip U4 is electrically connected to the other end of the resistor R14 and one end of the resistor R15; the other end of the resistor R16 is grounded; the other end of the resistor R15 is grounded.

[0024] The battery of the meter under test is connected to the detection circuit through the battery socket 5, the battery pin 3 is inserted into the battery of the original meter, the meter battery power supply circuit is connected to the detection circuit through the connector - and connector +, the knob switch SW1 is rotated to select the corresponding gear, and the corresponding sampling resistor inputs the collected signal into the 3rd pin of the amplifier chip U5, and then inputs the amplified signal into the A / D converter I CL7107 chip U1 through the 6th pin of the amplifier chip, and R14 / R16 is the amplification factor of the amplifier.

[0025] The signal processing display module includes an I CL7107 chip U1, a reset button switch K2, digital tubes LED1, LED2, LED3, LED4, capacitors C1, C2, C3, C4, C5, resistors R1, R5, R6, R7, R9, and a variable resistor RV1; the OSC1 pin of the I CL7107 chip U1 is electrically connected to one end of the resistor R6 and one end of the capacitor C1; the other end of the resistor R6 is electrically connected to the OSC2 pin of the I CL7107 chip U1; the other end of the capacitor C1 is electrically connected to the OSC3 pin of the I CL7107 chip U1; the TEST pin of the I CL7107 chip U1 is electrically connected to one end of the reset button switch K2; the other end of the reset button switch K2 is electrically connected to the V+ pin of the I CL7107 chip U1; the VREF- pin of the I CL7107 chip U1 is electrically connected to the first end pin of the variable resistor RV1; the middle pin of the variable resistor RV1 is electrically connected to the I The VREF+ pin of the ICL7107 chip U1 is electrically connected, the second end pin of the variable resistor RV1 is electrically connected to one end of the resistor R5; the other end of the resistor R5 is electrically connected to the V+ pin of the ICL7107 chip U1; the CREF- pin of the ICL7107 chip U1 is electrically connected to one end of the capacitor C2; the other end of the capacitor C2 is electrically connected to the CREF+ pin of the ICL7107 chip U1; one end of the capacitor C3 and one end of the capacitor C4 are electrically connected to one end of the capacitor R7, the other end of the capacitor C3 is electrically connected to the VI NT pin of the ICL7107 chip U1, and the other end of the capacitor C4 is electrically connected to the CAZ pin of the ICL7107 chip U1; the other end of the resistor R7 is electrically connected to the VBUFF pin of the ICL7107 chip U1; the ACOM pin of the ICL7107 chip U1 is electrically connected to one end of the capacitor C5; the other end of the capacitor C5 and one end of the resistor R9 are electrically connected to the ICL7107 chip U1. The VI N+ pin of the CL7107 chip U1 is electrically connected, the A1-G1, A2-G2, A3-G3 pins of the CL7107 chip U1 are electrically connected to the D1-D21 pins of the digital tubes LED2, LED3, and LED4; the AB4 pin of the CL7107 chip U1 is electrically connected to the D22 pin of the digital tube LED1, and the POL pin of the CL7107 chip U1 is electrically connected to the D23 pin of the digital tube LED1.

[0026] I CL7107 chip U1, pins 38 to 40 are the lead-out terminals of the clock oscillator, resistor R6 and capacitor C1 are its external resistors and capacitors; pins 35 and 36 are the positive and negative terminals of the reference voltage, resistor R5 and variable resistor RV1 are used to adjust the reference voltage value; capacitor C2 between pins 33 and 34 is the external reference capacitor; pin 27 is the integration capacitor, connected to capacitor C3; pin 28 is the output terminal of the buffer amplifier, connected to the integration resistor R7; pin 29 is the reverse input terminal of the integrator and comparator, connected to the automatic zeroing capacitor C4, pins 30 and 31 are analog input terminals, connected to the positive and negative terminals of the acquisition module input signal respectively; 3 Pin 2 is the common terminal of analog signals, i.e., "analog ground", which is connected to the negative terminal of the input signal and the negative electrode of the reference voltage when in use; pins 2-20 and 22-25 are the drive pins connected to the digital tubes, and their corresponding A1-G1, A2-G2, A3-G3 are the drive signals for the strokes of the ones, tens, and hundreds respectively, which are connected to the corresponding stroke electrodes of the ones, tens, and hundreds LED digital tubes LED2, LED3, and LED4 in turn; pin 19 is the thousands stroke drive signal, which is connected to the corresponding stroke electrode of the thousands LED digital tube LED1; pin 20 is the drive end of the common electrode on the back of the liquid crystal display, i.e., the back electrode.

[0027] I CL7107 is an indirect A / D converter, which belongs to CMOS large-scale integrated circuit. It converts the average value of the input voltage into a time interval proportional to it by integrating the input analog voltage and the reference voltage twice, and then uses the pulse time interval to obtain the corresponding digital output. Its maximum display value is ±1999, the minimum resolution is 100uV, and the conversion accuracy is 0.05±1 word; it can directly drive the common anode LED digital tube without adding any driver; there is a highly stable 2.8V reference power supply between V+ and COM inside the chip, and the required reference voltage VREF can be obtained through a resistor divider; it can realize automatic zero adjustment and automatic polarity display functions through the internal analog switch; the input impedance is high and there is no attenuation effect on the input signal.

[0028] like Figure 2 As shown, a display screen 2 is provided on the upper surface of the shell, a gear knob 4 is provided below the display screen 2, and a battery socket 5, a full display button 6 and a power switch button 7 are provided below the gear knob 4; a battery pin 3 is provided on the top surface of the shell, and the display screen 2, the gear knob 4, the battery socket 5, the full display button 6, the power switch button 7, and the battery pin 3 are all electrically connected to the detection circuit; as shown Figure 3 As shown, the shell is provided with a battery box 8 for installing batteries to provide power to the detection device. By replacing different battery pins and battery sockets, the batteries of single-phase meters and three-phase meters can be tested to meet different detection requirements.

[0029] The use process of the detection device of this application is as follows:

[0030] Step 1: Remove the battery of the meter to be tested, connect the battery of the meter to be tested to the battery socket 5 of the detection device, and insert the battery pin 3 into the original battery socket of the meter to be tested.

[0031] Step 2: Select a matching gear and turn on the detection device. The A / D converter in the detection device samples the current signal of the battery of the meter to be tested through sampling resistors in different gears, integrates the input analog voltage and the reference voltage twice through the integrator, and converts the average value of the input voltage into a time interval proportional to it. Then, the pulse time interval is used to obtain the corresponding digital output, and then the LED digital tube is driven for display.

[0032] Step 3: Read the current of display screen 2, compare it with the current of a standard battery, determine whether the battery power consumption is in an abnormal state, and record the data of the abnormal state in real time.

[0033] In this application, the terms "comprises", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that an article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such article or device. In the absence of more restrictions, the elements defined by the sentence "comprising..." do not exclude the presence of other identical elements in the article or device comprising the elements.

[0034] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0035] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the intention of the present application also includes these modifications and variations.

Claims

1. A portable power consumption detection device for detecting an electric meter battery, characterized in that: It comprises a shell, in which a detection circuit is integrated, the detection circuit comprises a power module, an acquisition module, and a signal processing and display module, one end of the signal processing and display module is electrically connected to the power module, and the other end is electrically connected to the acquisition module; the power module is used to provide power for the remaining modules; the acquisition module is used to acquire the current signal of the battery of the electric meter and transmit the acquired current signal to the signal processing and display module; the signal processing and display module is used to process the received current signal into a digital signal and display the digital signal.

2. The portable power consumption detection device for detecting the battery of an electric meter according to claim 1, characterized in that: The power module includes a battery, a three-terminal voltage regulator U3, a 555 timer chip U2, a key switch K1, electrolytic capacitors C9, C10, C11, diodes D1, D2, capacitors C6, C7, C8, resistors R2, R3, R8, and an LED indicator D3; one end of the key switch K1 is electrically connected to the positive electrode of the battery, and the other end is electrically connected to the VI pin of the three-terminal voltage regulator U3 and one end of the capacitor C8; the other end of the capacitor C8 is grounded; the VO pin of the three-terminal voltage regulator U3 is electrically connected to one end of the resistor R2, one end of the resistor R3, the positive electrode of the electrolytic capacitor C9, the R pin and the VCC pin of the 555 timer chip U2; the GND pin of the three-terminal voltage regulator U3 is grounded; the other end of the resistor R2 is electrically connected to the positive electrode of the LED indicator D3; the other end of the resistor R3 is electrically connected to the DC pin of the 555 timer chip U2; the electrolytic capacitor The negative electrode of C9 is grounded; the negative electrode of the LED indicator D3 is grounded; the CV pin of the 555 timer chip U2 is electrically connected to one end of the capacitor C6; the TR pin of the 555 timer chip U2 is connected to the TH pin, and is also electrically connected to one end of the resistor R8 and one end of the capacitor C7; the Q pin of the 555 timer chip U2 is electrically connected to the positive electrode of the electrolytic capacitor C10; the other end of the capacitor C6 is grounded; the other end of the resistor R8 is electrically connected to the DC pin of the 555 timer chip U2; the other end of the capacitor C7 is grounded; the negative electrode of the electrolytic capacitor C10 is electrically connected to the negative electrode of the diode D1 and the positive electrode of the diode D2; the negative electrode of the diode D2 is grounded; the positive electrode of the electrolytic capacitor C11 is grounded; the positive electrode of the diode D1, the negative electrode of the electrolytic capacitor C11, and the VO pin of the three-terminal regulator U3 are electrically connected to the signal processing display module.

3. The portable power consumption detection device for detecting the battery of an electric meter according to claim 1, characterized in that: The acquisition module includes a connection port, a battery interface, an amplifier chip U5, a knob switch SW1, resistors R4, R10, R11, R12, R13, R14, R15, and R16; the connection port includes a connection port - and a connection port +; the battery interface includes a battery interface + and a battery interface -; the battery interface + and the battery interface - are electrically connected to the battery of the meter to be tested; the battery interface - is electrically connected to the connection port -; the connection port - and the connection port + are electrically connected to the original battery interface of the meter to be tested; the connection port + is electrically connected to one end of the resistor R13; the other end of the resistor R13 is electrically connected to the 20mA gear of the knob switch SW1 and one end of the resistor R4; the other end of the resistor R4 is electrically connected to the knob switch The 2mA position of SW1 and one end of the resistor R10 are electrically connected; the other end of the resistor R10 is electrically connected to the 200μA position of the knob switch SW1 and one end of the resistor R12; the other end of the resistor R12 is electrically connected to the 20μA position of the knob switch SW1 and one end of the resistor R11; the other end of the resistor R11 is electrically connected to the 2μA position of the knob switch SW1 and the in-phase input end of the amplifier chip U4; the inverting input end of the amplifier chip U4 is electrically connected to the resistor R14 and one end of the resistor R16, and the output end of the amplifier chip U4 is electrically connected to the other end of the resistor R14 and one end of the resistor R15; the other end of the resistor R16 is grounded; the other end of the resistor R15 is grounded.

4. The portable power consumption detection device for detecting the battery of an electric meter according to claim 1, characterized in that: The signal processing display module includes an ICL7107 chip U1, a reset button switch K2, digital tubes LED1, LED2, LED3, LED4, capacitors C1, C2, C3, C4, C5, resistors R1, R5, R6, R7, R9, and a variable resistor RV1; the OSC1 pin of the ICL7107 chip U1 is electrically connected to one end of the resistor R6 and one end of the capacitor C1; the other end of the resistor R6 is electrically connected to the OSC2 pin of the ICL7107 chip U1; the other end of the capacitor C1 is electrically connected to the OSC3 pin of the ICL7107 chip U1 The TEST pin of the ICL7107 chip U1 is electrically connected to one end of the reset button switch K2; the other end of the reset button switch K2 is electrically connected to the V+ pin of the ICL7107 chip U1; the VREF- pin of the ICL7107 chip U1 is electrically connected to the first end pin of the variable resistor RV1; the middle pin of the variable resistor RV1 is electrically connected to the VREF+ pin of the ICL7107 chip U1, and the second end pin of the variable resistor RV1 is electrically connected to one end of the resistor R5; the other end of the resistor R5 is electrically connected to the V+ pin of the ICL7107 chip U1 ; The CREF-pin of the ICL7107 chip U1 is electrically connected to one end of the capacitor C2; the other end of the capacitor C2 is electrically connected to the CREF+ pin of the ICL7107 chip U1; one end of the capacitor C3 and one end of the capacitor C4 are electrically connected to one end of the capacitor R7, the other end of the capacitor C3 is electrically connected to the VINT pin of the ICL7107 chip U1, and the other end of the capacitor C4 is electrically connected to the CAZ pin of the ICL7107 chip U1; the other end of the resistor R7 is electrically connected to the VBUFF pin of the ICL7107 chip U1; the I The ACOM pin of the CL7107 chip U1 is electrically connected to one end of the capacitor C5; the other end of the capacitor C5 and one end of the resistor R9 are electrically connected to the VIN+ pin of the ICL7107 chip U1, and the A1-G1, A2-G2, and A3-G3 pins of the ICL7107 chip U1 are electrically connected to the D1-D21 pins of the digital tubes LED2, LED3, and LED4; the AB4 pin of the ICL7107 chip U1 is electrically connected to the D22 pin of the digital tube LED1, and the POL pin of the ICL7107 chip U1 is electrically connected to the D23 pin of the digital tube LED1.

5. The portable power consumption detection device for detecting the battery of an electric meter according to claim 1, characterized in that: A display screen is provided on the upper surface of the shell, a gear knob is provided below the display screen, and a battery socket, a full display button and a power switch button are provided below the gear knob; a battery pin is provided on the top surface of the shell, and the display screen, gear knob, battery socket, full display button, power switch button and battery pin are all electrically connected to the detection circuit.

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