Double-loop direct current measuring meter

Abstract

The utility model provides a double-loop direct current measuring meter, which relates to the field of double-loop direct current measuring meters and comprises a shell, the shell comprises a shell body and an end cover, a detection assembly is installed in an inner cavity of the shell, and the shell body and the end cover are used for providing protection for the detection assembly. The detection assembly comprises a system control assembly, a power supply assembly, a peripheral assembly and a measurement assembly, and the system control assembly comprises an MCU main control chip and a data storage module; according to the utility model, the system control assembly, the power supply assembly, the peripheral assembly and the measurement assembly are arranged, so that the measurement precision and long-term stability of the electric energy meter can be ensured, and the double-loop design can ensure that the electric energy meter can provide high-precision measurement results in different current and voltage ranges; and the high-performance analog-to-digital converter and the high-performance data processing unit are adopted, so that the speed and the accuracy of data acquisition are ensured.

Description

Technical Field

[0001] The utility model belongs to the field of double - loop DC measuring meters, and specifically relates to a double - loop DC measuring meter. Background Technique

[0002] A double - loop DC measuring meter is an instrument used to measure DC electrical parameters. It can monitor two independent circuits simultaneously. This kind of measuring meter is usually used in fields such as power systems, electronic devices, and industrial control, and is especially suitable for occasions such as charging piles, solar power supply, telecommunication base stations, and building automation to ensure the normal operation of the system and optimize energy use.

[0003] Currently, there are relatively few DC meter solutions on the market, and the performance of the solutions varies. A large part of them use the ADC inside the MCU for signal measurement, with relatively low measurement accuracy and poor temperature characteristics, thus unable to meet the requirements of high - precision DC measurement in the current photovoltaic and charging pile fields.

[0004] In summary, the utility model provides a double - loop DC measuring meter to solve the above problems. Content of the Utility Model

[0005] To solve the above - mentioned technical problems, the utility model provides the following technical solutions:

[0006] A double - loop DC measuring meter includes a housing, the housing includes a shell and an end - cover. A detection component is installed in the inner cavity of the housing. The shell and the end - cover are used to provide protection for the detection component. The detection component includes a system control component, a power supply component, a peripheral component, and a measurement component. The system control component includes an MCU main control chip and a data storage module. The system control component is used to process and store the measurement data of the measurement component. The power supply component includes a main power supply and an auxiliary power supply, and the power supply component is used to provide electrical energy. The peripheral component includes an LCD display, an electrical energy pulse output, and a communication module. The LCD display is used for data display. The electrical energy pulse output is used for meter calibration and accuracy detection. The communication module is used for remote data transmission. The number of the measurement components is two groups, and the measurement component includes current signal acquisition, voltage signal acquisition, and a signal measurement chip. The measurement component is used to measure the circuit.

[0007] Further, in the utility model, the number of the communication modules is two groups. The LCD display is installed on the surface of the end - cover. The end - cover and the shell are connected by bolt threads.

[0008] Further, in the present utility model, the output ends of the data storage module, the power supply component, the peripheral component, and the measurement component are all connected to the input end of the MCU main control chip, and the output end of the MCU main control chip is respectively connected to the input ends of the data storage module, the measurement component, and the peripheral component.

[0009] Further, in the present utility model, the output end of the measurement component is interconnected with the input end and the output end of the communication module, and a physical button is further provided on the surface of the end cover.

[0010] Further, in the present utility model, the current signal acquisition adopts a Hall effect sensor, the voltage signal acquisition adopts a high-precision voltage divider and a sampling resistor to acquire DC voltage signals, the signal measurement chip adopts a DC watt-hour meter measurement chip, and the output ends of the current signal acquisition and the voltage signal acquisition are both connected to the input end of the signal measurement chip.

[0011] Further, in the present utility model, the data storage module selects EEPROM and is used to store measurement data and device configuration parameters.

[0012] Further, in the present utility model, the main power supply adopts a DCDC switching power supply, DC9 - 36V, with two groups of outputs. The main circuit supplies power to the system, and the auxiliary circuit supplies power to the communication circuit. There are three groups of auxiliary power supplies, and all three groups of auxiliary power supplies are powered by the main circuit of the main power supply. Two of the auxiliary power supplies supply power to the DC metering of two circuits, and the other auxiliary power supply supplies power to the current signal acquisition.

[0013] Beneficial effects: The present utility model has the following beneficial effects:

[0014] By providing a housing in the present utility model, it can provide an installation and protection space for the detection component. By providing a system control component, a power supply component, a peripheral component, and a measurement component, it can ensure the accuracy and long-term stability of the watt-hour meter measurement. Through the dual-loop design, it can ensure that the meter can provide high-precision measurement results in different current and voltage ranges, ensuring that the measurements of each loop do not interfere with each other. By adopting a high-performance analog-to-digital converter and a data processing unit, it can ensure the speed and accuracy of data acquisition. Through the LCD display, it can provide a clear display interface, facilitating users to view real-time data and supporting data storage and export. By the main power supply and the auxiliary power supply, it can ensure the stability and reliability of the meter in different working environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the front view structural schematic diagram of the present utility model;

[0016] Figure 2 is the separated state structural schematic diagram of the housing and the end cover of the present utility model;

[0017] Figure 3 is a schematic flow chart of the detection component of the present utility model;

[0018] Figure 4 is a schematic flow chart of the measurement component of the present utility model;

[0019] Figure 5 is a schematic flow chart of the DC measurement part system of the present utility model;

[0020] Figure 6 is a schematic flow chart of the main control system of the present utility model;

[0021] Figure 7 is a schematic flow chart of the communication system of the present utility model;

[0022] Figure 8 is a schematic flow chart of the power supply system of the present utility model;

[0023] Figure 9 is a schematic flow chart of the communication circuit and pulse output system of the present utility model;

[0024] Figure 10 is a schematic flow chart of the present utility circuit.

[0025] In the figure:

[0026] 1. Outer shell; 101. Housing; 102. End cover; 2. Detection component; 21. System control component; 211. MCU main control chip; 212. Data storage module; 22. Power supply component; 221. Main power supply; 222. Auxiliary power supply; 23. Peripheral component; 231. LCD display; 232. Electric energy pulse output; 233. Communication module; 24. Measurement component; 241. Current signal acquisition; 242. Voltage signal acquisition; 243. Signal measurement chip. Specific embodiments

[0027] In order to better understand the technical content of the present utility model, specific embodiments are hereby given and described in conjunction with the accompanying drawings as follows. In this disclosure, aspects of the present utility model are described with reference to the drawings, and many illustrative embodiments are shown in the drawings. The embodiments of this disclosure do not necessarily define all aspects of the present utility model. It should be understood that the various concepts and embodiments introduced above, as well as those described in more detail below, can be implemented in any of many ways, because the concepts and embodiments disclosed in the present utility model are not limited to any implementation manner. Additionally, some aspects of the present utility model can be used alone, or in any suitable combination with other aspects of the present utility model.

[0028] Embodiment 1

[0029] AsFigures 1-10 As shown, this is the first embodiment of the present utility model. This embodiment provides a dual-loop DC measuring meter, which includes a housing 1. The housing 1 includes a shell 101 and an end cover 102. A detection component 2 is installed in the inner cavity of the housing 1. The shell 101 and the end cover 102 are used to provide protection for the detection component 2. The detection component 2 includes a system control component 21, a power supply component 22, a peripheral component 23, and a measurement component 24. The system control component 21 includes an MCU main control chip 211 and a data storage module 212. The system control component 21 is used to process and store the measurement data of the measurement component 24. The power supply component 22 includes a main power supply 221 and an auxiliary power supply 222. The power supply component 22 is used to provide electrical energy. The peripheral component 23 includes an LCD display 231, an electric energy pulse output 232, and a communication module 233. The LCD display 231 is used for data display. The electric energy pulse output 232 is used for meter calibration and accuracy detection. The communication module 233 is used for remote data transmission. The number of the measurement components 24 is two groups. The measurement component 24 includes a current signal acquisition 241, a voltage signal acquisition 242, and a signal measurement chip 243. The measurement component 24 is used to measure the circuit.

[0030] As Figures 1-10 shown, the MCU main control chip 211 uses a high-performance MCU to control the two measurement loops, ensuring the normal and reliable operation of the measurement circuit. At the same time, it processes the voltage and current data collected by the measurement loops, and writes efficient data processing algorithms, including filtering, calibration, temperature compensation, etc., to ensure fast and accurate power measurement for each loop. The data storage module 212 is equipped with a memory with sufficient capacity to store measurement data and device configuration parameters, and at the same time controls each peripheral to ensure stable and reliable data interaction. Through the main power supply 221 and the auxiliary power supply 222, the stability and reliability of the meter in different working environments can be ensured. The communication module 233 is convenient for supporting remote data transmission and centralized management. Through two completely independent communication interfaces, it can support data interaction between two main systems at the same time. Through the combination of the LCD display 231 and physical buttons, the collected data can be read on-site, and the parameters of the instrument can also be set. Through the MCU, high-precision electric energy pulses can be output, with a maximum of two paths, which are the electric energy pulses of the two loops respectively, and are used for production meter calibration and accuracy detection. The signal measurement chip 243 adopts high precision, with an ADC of 22-bit effective precision, and the voltage and current signals are simultaneously ADC-converted to ensure high real-time performance of the calculated power value. Through the dual-loop design, it can ensure that the meter can provide high-precision measurement results in different current and voltage ranges, and ensure that the measurements of each loop do not interfere with each other. High-performance analog-to-digital converters and data processing units are used to ensure the speed and accuracy of data acquisition.

[0031] Embodiment 2

[0032] Referring to Figures 1-4, which is the second embodiment of the present utility model, and this embodiment is based on the previous embodiment.

[0033] In this embodiment, the number of communication modules 233 is two groups. The LCD monitor 231 is installed on the surface of the end cap 102, and the end cap 102 is threadedly connected to the housing 101 by bolts.

[0034] The output ends of the data storage module 212, the power supply component 22, the peripheral component 23, and the measurement component 24 are all connected to the input end of the MCU main control chip 211, and the output end of the MCU main control chip 211 is respectively connected to the input ends of the data storage module 212, the measurement component 24, and the peripheral component 23.

[0035] The output end of the measurement component 24 is interconnected with the input end and the output end of the communication module 233, and physical buttons are also provided on the surface of the end cap 102.

[0036] The current signal acquisition 241 uses a Hall effect sensor, the voltage signal acquisition 242 uses a high-precision voltage divider and a sampling resistor to acquire DC voltage signals, the signal measurement chip 243 uses a DC watt-hour meter measurement chip, and the output ends of the current signal acquisition 241 and the voltage signal acquisition 242 are both connected to the input end of the signal measurement chip 243.

[0037] The data storage module 212 selects EEPROM and is used to store measurement data and device configuration parameters.

[0038] The main power supply 221 uses a DCDC switching power supply, with DC9 - 36V input and two groups of outputs. The main circuit supplies power to the system, and the auxiliary circuit supplies power to the communication circuit. There are three groups of auxiliary power supplies 222, and all three groups of auxiliary power supplies 222 are powered by the main circuit of the main power supply 221. Two groups of auxiliary power supplies 222 supply power to the DC metering of two circuits, and the other group of auxiliary power supplies 222 supplies power to the current signal acquisition 241.

[0039] As Figures 1-4 shown, the main power supply 221 adopts an optimized PCB layout to minimize the coupling and interference of high-frequency signals, ensuring the stability and reliability of the circuit. The auxiliary power supply 222 adopts the same DCDC switching power supply. The voltage and current signal acquisition circuit ensures that the acquired signals have good linearity and temperature stability. The voltage and current signals are simultaneously ADC-converted to ensure high real-time performance of calculating the power value. The communication module 233 is a 485 communication interface.

[0040] In use, the MCU master chip 211 uses a high-performance MCU to control two measurement circuits, ensuring the normal and reliable operation of the measurement circuit. At the same time, it processes the voltage and current data collected by the measurement circuit, and develops efficient data processing algorithms, including filtering, calibration, temperature compensation, etc., to ensure fast and accurate power metering for each circuit. The data storage module 212 is equipped with a memory with sufficient capacity to store measurement data and device configuration parameters. At the same time, it controls each peripheral device to ensure stable and reliable data interaction. The main power supply 221 and the auxiliary power supply 222 can ensure the stability and reliability of the electric meter in different working environments. The communication module 233 facilitates remote data transmission and centralized management. Through two completely independent communication interfaces, it can support data interaction between two main systems simultaneously. By combining the LCD display 231 with physical buttons, the collected data can be read on-site, and the parameters of the instrument can also be set. The MCU can provide high-precision power pulses, with a maximum of two channels, which are the power pulses of the two circuits respectively, and are used for production meter calibration and accuracy detection. The signal measurement chip 243 adopts high precision, with an ADC having 22-bit effective precision. The voltage and current signals are simultaneously ADC-converted to ensure high real-time performance of the calculated power value. Through the dual-loop design, it can ensure that the electric meter can provide high-precision measurement results in different current and voltage ranges, and ensure that the measurements of each loop do not interfere with each other. High-performance analog-to-digital converters and data processing units are used to ensure the speed and accuracy of data acquisition.

[0041] The standard parts used in this application document can all be purchased from the market, and can also be customized according to the descriptions in the specification and drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, welding, etc. that are mature in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art. The control method is to automatically control through a controller, and the control circuit of the controller can be realized by simple programming by those skilled in the art, which belongs to the common general knowledge in this field. And this application document is mainly used to protect mechanical devices, so the control method and circuit connection will not be explained in detail in this application document.

[0042] Although the present utility model has been disclosed above with preferred embodiments, it is not intended to limit the present utility model. Those with ordinary knowledge in the technical field to which the present utility model belongs can make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to what is defined by the claims.

Claims

1. A dual-circuit DC measuring meter, comprising a housing (1), characterized in that: The housing (1) comprises a housing (101) and an end cover (102); a detection component (2) is installed in the inner cavity of the housing (1); the housing (101) and the end cover (102) are used to provide protection for the detection component (2); the detection component (2) comprises a system control component (21), a power supply component (22), a peripheral component (23) and a measurement component (24); the system control component (21) comprises an MCU main control chip (211) and a data storage module (212); the system control component (21) is used to process and store measurement data of the measurement component (24); the power supply component (22) comprises a main power supply (221 ) and an auxiliary power supply (222), the power supply component (22) is used to provide electric energy, the peripheral component (23) includes an LCD display (231), an electric energy pulse output (232) and a communication module (233), the LCD display (231) is used for data display, the electric energy pulse output (232) is used for calibration and accuracy detection, the communication module (233) is used for remote data transmission, the number of the measurement components (24) is two groups, the measurement components (24) include current signal acquisition (241), voltage signal acquisition (242) and a signal measurement chip (243), and the measurement components (24) are used to measure circuits.

2. The dual-circuit DC measuring meter according to claim 1, characterized in that: The number of the communication modules (233) is two groups, the LCD display (231) is mounted on the surface of the end cover (102), and the end cover (102) and the housing (101) are threadedly connected by bolts.

3. The dual-circuit DC measuring meter according to claim 1, characterized in that: The output ends of the data storage module (212), the power supply component (22), the peripheral component (23) and the measurement component (24) are all connected to the input end of the MCU main control chip (211), and the output end of the MCU main control chip (211) is respectively connected to the input end of the data storage module (212), the measurement component (24) and the peripheral component (23).

4. The dual-circuit DC measuring meter according to claim 1, characterized in that: The output end of the measuring component (24) is interconnected with the input end and the output end of the communication module (233), and a physical button is also provided on the surface of the end cover (102).

5. The dual-circuit DC measuring meter according to claim 1, characterized in that: The current signal acquisition (241) uses a Hall effect sensor, the voltage signal acquisition (242) uses a high-precision voltage divider and a sampling resistor to acquire a DC voltage signal, the signal measurement chip (243) uses a DC electric energy meter measurement chip, and the output ends of the current signal acquisition (241) and the voltage signal acquisition (242) are both connected to the input end of the signal measurement chip (243).

6. The dual-circuit DC measuring meter according to claim 1, characterized in that: The data storage module (212) is an EEPROM and is used to store measurement data and equipment configuration parameters.

7. The dual-circuit DC measuring meter according to claim 1, characterized in that: The main power supply (221) adopts a DCDC switching power supply, with a DC9-36V input and two groups of outputs. The main circuit supplies power to the system, and the auxiliary circuit supplies power to the communication circuit. The auxiliary power supply (222) is provided with three groups, and the three groups of auxiliary power supplies (222) are all powered by the main circuit of the main power supply (221). Two groups of the auxiliary power supplies (222) supply power to the DC measurement of the two circuits, and the other group of the auxiliary power supplies (222) supplies power to the current signal acquisition (241).

Images