CN110866369A - System and device for verification of electric energy meter management chip - Google Patents

Abstract

The invention discloses a system and a device for verification of an electric energy meter management chip. The system for verification of electric energy meter management chips includes an FPGA with built-in chip programs to be inspected and an FPGA sub-board connected to the FPGA; wherein the FPGA sub-board includes a signal processing module connected to the FPGA for collecting voltage signals and current signals , and convert the voltage and current signals into digital signals and send them to the FPGA; the FPGA verifies whether the function of the chip to be inspected meets the design requirements according to the program of the chip to be inspected and the digital signal. Among them, by placing the running program of the power meter management chip in the FPGA, and cooperating with the FPGA daughter board to simulate the normal operating environment of the power meter, the running program can be simulated and verified, so that the power meter management chip can be repeatedly debugged and solved. The technical problem that there is no special test device when developing the electric energy meter management chip is solved, and the development cost is reduced.

Description

System and device for verification of electric energy meter management chip

technical field

The invention relates to the field of chip design verification, in particular to a system and device for verification of an electric energy meter management chip.

Background technique

Common chips in electric energy meters include metering chips and management chips. Although foreign management chips have always been in the leading position in electric energy meters, with the changes in the international situation and the development of technology, more and more manufacturers have the ability to independently develop , trying to use self-developed energy meter management chips to replace foreign imported chips and break the foreign monopoly. However, the research and development cycle of the electric energy meter management chip is long, and the research and development cost is high. In order to reduce the number of tape-outs, the chip needs to be repeatedly verified during the chip design process.

At present, in order to verify whether the electric energy meter management chip meets all the requirements of the electric energy meter, it is usually necessary to apply the physical chip to the real electric energy meter for verification when designing the electric energy meter management chip. When the chip does not meet the requirements, it can only be redesigned and cannot continue. Used for debugging and verification, increasing design cost.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to provide a system and device for verification of an electric energy meter management chip, which aims to solve the technical problem in the prior art that there is no special testing device when developing an electric energy meter management chip.

In order to achieve the above object, the present invention provides a system for verification of an electric energy meter management chip, the system for verification of an electric energy meter management chip includes an FPGA with a built-in chip program to be inspected and an FPGA sub-board connected to the FPGA; in,

The FPGA sub-board includes a signal processing module, the signal processing module is connected to the FPGA, and is used to collect voltage signals and current signals, convert the voltage signals and the current signals into digital signals, and send them to the FPGA. FPGA;

The FPGA is used for verifying whether the function of the chip to be inspected meets the design requirements according to the program of the chip to be inspected and the digital signal.

Preferably, the signal processing module includes a voltage and current sampling circuit, an analog-to-digital converter, a random access memory and a metering circuit; the voltage and current sampling circuit is respectively connected to the bus bar and the analog-to-digital converter, and the analog-to-digital A converter is connected to the random access memory, the random access memory is connected to the metering circuit, and the metering circuit is connected to the FPGA.

Preferably, the FPGA sub-board further includes an FPGA interface, the FPGA interface is provided with pins corresponding to the functions of the chip to be tested, and the signal processing module is connected to the FPGA through the FPGA interface.

Preferably, the number of pins of the FPGA interface is greater than the number of pins of the chip to be inspected.

Preferably, the FPGA daughter board further includes an electric energy meter peripheral module, and the electric energy meter peripheral module includes a button, a display screen, an indicator light and a communication circuit; the button, the display screen, the indicator light and all the The communication circuits are respectively connected with the FPGA; wherein,

The button is used to receive an input signal from a user and send the input signal to the FPGA, so that the FPGA outputs a corresponding display signal to the display screen according to the input signal;

The display screen is used to receive the display signal and display it;

The indicator light is used to receive the indication signal sent by the FPGA and indicate the electric energy pulse of the electric energy meter;

The communication circuit is configured to communicate with the FPGA, obtain the power data of the user, and send the power consumption to the power system.

Preferably, both the indicator light and the communication circuit are connected to the FPGA through a resistor.

Preferably, the FPGA includes a configurable logic module and an input module, the configurable logic module has a built-in chip program to be tested, and the configurable logic module is connected to the input module, and the FPGA interface includes a function an interface and an output interface; the configurable logic module is connected to the functional interface, and the input module is connected to the output interface.

Preferably, the FPGA further includes a security module, the security module is connected to the configurable logic module, and the security module has a built-in security engine with an encryption algorithm.

Preferably, it also includes a power supply for supplying power to the FPGA, and an isolation device is provided between the power supply and the FPGA.

The present invention also provides an apparatus for verification of an electric energy meter management chip, and the apparatus for verification of an electric energy meter management chip includes the above-mentioned system for verification of an electric energy meter management chip.

In the present invention, an FPGA with a built-in chip program to be tested and an FPGA sub-board connected to the FPGA are arranged in a system for verification of an electric energy meter management chip; wherein, the FPGA sub-board includes a signal processing module connected to the FPGA for collecting voltage signals and current signal, and convert the voltage signal and current signal into digital signal and send to FPGA; FPGA verifies whether the function of the chip to be inspected meets the design requirements according to the program of the chip to be inspected and the digital signal. Among them, by placing the running program of the power meter management chip in the FPGA, and cooperating with the FPGA daughter board to simulate the normal operating environment of the power meter, the running program can be simulated and verified, so that the power meter management chip can be repeatedly debugged and solved. The technical problem that there is no special test device when developing the electric energy meter management chip is solved, and the development cost is reduced.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained according to the structures shown in these drawings without creative efforts.

1 is a schematic structural diagram of an embodiment of a system for verification of an electric energy meter management chip according to the present invention;

FIG. 2 is a schematic structural diagram of an embodiment of an FPGA interface in FIG. 1 .

Description of reference numbers:

label name label name 10 FPGA 210 Signal processing module 20 FPGA daughter board 220 Energy Meter Peripheral Module

The realization, functional characteristics and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that if there are directional indications (such as up, down, left, right, front, back, etc.) involved in the embodiments of the present invention, the directional indications are only used to explain a certain posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly.

In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for the purpose of description, and should not be construed as indicating or implying Its relative importance or implicitly indicates the number of technical features indicated. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of such technical solutions does not exist. , is not within the protection scope of the present invention.

The invention provides a system for verifying a management chip of an electric energy meter.

Referring to FIG. 1 , in one embodiment, the system for verification of an electric energy meter management chip includes an FPGA 10 with a built-in chip program to be inspected, and an FPGA sub-board 20 connected to the FPGA 10 ; wherein the FPGA sub-board 20 includes a signal processing module 210, the signal processing module 210 is connected to the FPGA 10 for collecting voltage signals and current signals, converting the voltage signals and the current signals into digital signals and sending them to the FPGA 10; the The FPGA 10 is configured to verify whether the function of the chip to be inspected meets the design requirements according to the program of the chip to be inspected and the digital signal.

It should be noted that the chip to be inspected refers to the electric energy meter management chip to be inspected, and the program of the chip to be inspected refers to the running program of the electric energy meter management chip to be inspected. The FPGA (Field-Programmable Gate Array, field programmable gate array) 10 is built in The running program of the electric energy meter management chip is to be detected, and the FPGA sub-board 20 simulates the other parts of the electric energy meter except the electric energy meter management chip. The combination of the two can be used as a simulated electric energy meter, and the FPGA sub-board 20 can simulate the running environment of the electric energy meter. Digital signal, FPGA10 runs the program according to the digital signal, and performs operations such as calculation, storage, and display, so as to verify whether the various functions of the electric energy meter management chip corresponding to the running program meet the design requirements.

Specifically, the signal processing module 210 includes a voltage and current sampling circuit (not shown), an analog-to-digital converter (not shown), a random access memory (not shown) and a metering circuit (not shown); the voltage and current sampling circuit , respectively connected to the bus bar and the analog-to-digital converter, for sampling the voltage and current, obtaining the voltage signal and the current signal, and sending the voltage signal and the current signal to the analog-to-digital converter, the analog-to-digital converter and the all The random access memory is connected to convert the voltage signal and the current signal into an initial digital signal, and the initial digital signal is sent to the random access memory for storage, and the random access memory is connected to the metering circuit to convert the initial digital signal. The signal is sent to the metering circuit, the metering circuit is connected to the FPGA 10 , the metering circuit performs metering operations according to the initial digital signal, obtains the final digital signal, and sends the final digital signal to the FPGA 10 .

It should be understood that, the above-mentioned metering circuit may be a metering circuit integrated in a metering chip or an unintegrated metering circuit, and its hardware form is not limited in this embodiment.

In a specific implementation, the FPGA sub-board 20 further includes an FPGA interface (not shown), and the FPGA interface is provided with pins corresponding to the functions of the chip to be tested, and the signal processing module 210 passes through the FPGA. The interface is connected with the FPGA10.

It should be understood that the FPGA sub-board 20 should be designed according to the actual requirements of the electric energy meter, and its reliability and function are not lower than that of existing products. In order to enable the FPGA 10 to be connected to the FPGA sub-board 20, it can be used for the verification of the electric energy meter management chip. , it is necessary to set the FPGA interface on the FPGA daughter board 20 to realize the communication with the FPGA10. The FPGA interface should be provided with pins corresponding to the functions of the energy meter management chip. Please refer to Figure 2 together, which is the FPGA interface. A schematic structural diagram of an embodiment of . The pins on the FPGA interface can include functions such as external load switch control, measurement chip serial communication reception, measurement chip serial communication transmission, LCD power control, relay detection input power control and other functions.

Further, in order to make the verification system suitable for most types of electric energy meter management chips, the number of pins of the FPGA interface may be greater than the number of pins of the chip to be checked. For example, the actual energy meter management chip has only about 80 pins when it is designed, but 120 pins can be set when designing the FPGA interface, and the unused pins can be left blank.

Further, the FPGA daughter board 20 also includes an electric energy meter peripheral module 220, and the electric energy meter peripheral module 220 includes a button (not shown), a display screen (not shown), an indicator light (not shown) and a communication circuit (not shown). not marked); the button, the display screen, the indicator light and the communication circuit are respectively connected to the FPGA10; wherein, the button is used to receive the input signal of the user and send the input signal to the FPGA 10, so that the FPGA 10 outputs a corresponding display signal to the display screen according to the input signal; the display screen is used to receive the display signal and display it; the indicator light is used to Receive the instruction signal sent by the FPGA, and indicate the power pulse of the power meter; the communication circuit is used for data interaction with the FPGA 10, reading the user's power consumption data and sending the power consumption data to the power system .

It should be noted that, the indicator light and the communication circuit are both connected to the FPGA 10 through a resistor, or connected to the FPGA 10 through devices such as resistors and capacitors. In order to meet the pluggability of the FPGA board, it is necessary to add a design method to prevent the abnormality of the FPGA10, such as adding resistance to the external switch control, leakage current detection, carrier communication, relay control, pulse output and other signals to divide the voltage and improve the resistance. intrusive.

It should be understood that the display screen is preferably a liquid crystal display screen, which can display data such as power and clock; the communication circuit is preferably an RS485 communication circuit; in addition, the power meter peripheral module may also include EEPROM ( Electrically Erasable Programmable read only memory, electrically erasable programmable read only memory), FLASH (flash memory) and relays, etc., together with FPGA to realize pulse output, relay output control, etc.

In the specific implementation, since the electric energy meter has three operating modes: work, low power consumption, and ultra-low power consumption. The working mode means that the electric energy meter management chip only runs at full speed after the electric energy meter is under normal measurement conditions. In the case of low power consumption, the electric energy meter needs to accept the key to wake up; in the case of ultra-low power consumption, it only needs to maintain the data in the memory without loss. Therefore, in this embodiment, the user can input the working mode switching signal of the electric energy meter by pressing a button, and finally the FPGA 10 can realize the switching of the working mode of the electric energy meter.

Further, the FPGA 10 includes a configurable logic module (not shown in the figure) and an input module (not shown in the figure), the configurable logic module has a built-in chip program to be checked, and the configurable logic module and the The input module is connected, and the FPGA interface includes a function interface (not shown) and an output interface (not shown); the configurable logic module is connected to the function interface, and the input module is connected to the output interface.

It should be understood that the configurable logic module on the FPGA 10 is connected with the functional interface on the FPGA sub-board 20, and the configurable logic module realizes switching of various modes and function realization of the FPGA sub-board 20. The input module on the FPGA 10 is connected with each output interface on the FPGA sub-board 20 to form a loop to control relay output, pulse output and communication control.

Further, the FPGA 10 further includes a security module (not shown), the security module is connected to the configurable logic module, and the security module has a built-in security engine with an encryption algorithm.

It should be understood that the encryption algorithm may be a national secret algorithm or other algorithms, which is not limited in this embodiment. Generally, in order to ensure the security of the electric energy meter management chip, a security engine integrated with an encryption algorithm is used, so that the The chip also has active immunity. In this embodiment, the encrypted electric energy meter management chip is simulated by the security module in the FPGA 10, which further restores the real application scenario of the electric energy meter management chip, and makes the verification result more accurate.

Further, the system for verification of the electric energy meter management chip further includes a power supply (not shown) for supplying power to the FPGA 10 , and an isolation device is provided between the power supply and the FPGA 10 .

It should be understood that the power supply of the FPGA 10 is powered by an external power supply, so isolation needs to be considered in the power supply to avoid interference from the external power supply, and isolation devices, such as optocouplers, need to be added in the circuit design.

Hereinafter, the system design steps of this embodiment will be described with reference to FIG. 1 and FIG. 2:

Step 1. First, design according to the final arrangement of the electric energy meter management chip. All PINs used on the electric energy meter are reflected. Combined with the function of FPGA10, the PIN on the electric energy meter management chip is corresponding to the FPGA interface, and the arrangement of the FPGA interface Specifically, referring to FIG. 2 , the pins of the FPGA interface are more than the pins on the power meter management chip.

Step 2. The circuit designed on the FPGA daughter board 20 should fully meet the requirements of all functions of the electric energy meter. Among them, the signal processing module 210 is designed with a voltage and current sampling circuit, an analog-to-digital converter, a random access memory and a metering circuit. The current is sampled, and finally converted into a digital signal and transmitted to the FPGA10. The FPGA10 can perform operations such as calculation, storage, and display according to specific functional requirements; the power meter peripheral module 220 is designed with buttons, display screens, indicator lights, buttons, and communication circuits. The circuit realizes the functions of metering, display, storage, button, communication and so on.

Step 3. FPGA10 is connected with metering circuit, button, display screen, indicator light, button and communication circuit through FPGA interface, and resistance is added to external switch control, leakage current detection, carrier communication, relay control, pulse output and other signals , used to divide the voltage and improve the anti-interference.

Step 4. An isolation device is added between the power supply of the FPGA 10 and the FPGA 10 .

Step 5. Run the program of the chip to be tested built in the FPGA 10 to verify the chip.

In this embodiment, an FPGA with a built-in chip program to be checked and an FPGA sub-board connected to the FPGA are provided in the system for verification of an electric energy meter management chip; wherein, the FPGA sub-board includes a signal processing module connected to the FPGA for Collect voltage and current signals, convert the voltage and current signals into digital signals and send them to the FPGA; the FPGA verifies whether the function of the chip to be tested meets the design requirements according to the program of the chip to be tested and the digital signal. Among them, by placing the running program of the power meter management chip in the FPGA, and simulating the normal operating environment of the power meter with the FPGA daughter board, the running program can be simulated and verified, so that in the process of designing the power meter management chip, it can be repeatedly debugged to solve the problem. The technical problem that there is no special test device when developing the electric energy meter management chip is solved, and the development cost is reduced.

The present invention also provides a device for verifying an electric energy meter management chip, the device for verifying an electric energy meter management chip includes the above-mentioned system for verifying an electric energy meter management chip, and the device for verifying an electric energy meter management chip For the system structure of the verification device, refer to the above-mentioned embodiments, which will not be repeated here; Therefore, the device for verification of the electric energy meter management chip has all the above-mentioned beneficial effects.

The above are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields , are similarly included in the scope of patent protection of the present invention.

Claims (10)

1. A system for verifying an electric energy meter management chip is characterized by comprising an FPGA (field programmable gate array) with a built-in chip program to be verified and an FPGA daughter board connected with the FPGA; wherein,

the FPGA daughter board comprises a signal processing module, and the signal processing module is connected with the FPGA and used for acquiring a voltage signal and a current signal, converting the voltage signal and the current signal into digital signals and then sending the digital signals to the FPGA;

and the FPGA is used for verifying whether the function of the chip to be detected meets the design requirement according to the program of the chip to be detected and the digital signal.

2. The system for electric energy meter management chip verification of claim 1, wherein the signal processing module comprises a voltage current sampling circuit, an analog-to-digital converter, a random access memory and a metering circuit; the voltage and current sampling circuit is respectively connected with the bus and the analog-to-digital converter, the analog-to-digital converter is connected with the random access memory, the random access memory is connected with the metering circuit, and the metering circuit is connected with the FPGA.

3. The system for electric energy meter management chip verification according to claim 2, wherein the FPGA daughter board further comprises an FPGA interface, a pin corresponding to a function of the chip to be verified is disposed on the FPGA interface, and the signal processing module is connected to the FPGA through the FPGA interface.

4. The system for power meter management chip validation of claim 3, wherein the number of pins of the FPGA interface is greater than the number of pins of the chip to be verified.

5. The system for electric energy meter management chip validation of claim 4, wherein the FPGA daughter board further comprises an electric energy meter peripheral module, the electric energy meter peripheral module comprising keys, a display screen, an indicator light and a communication circuit; the key, the display screen, the indicator light and the communication circuit are respectively connected with the FPGA; wherein,

the key is used for receiving an input signal of a user and sending the input signal to the FPGA so that the FPGA outputs a corresponding display signal to the display screen according to the input signal;

the display screen is used for receiving the display signal and displaying the display signal;

the indicator light is used for receiving the indication signal sent by the FPGA and indicating the electric energy pulse of the electric energy meter;

and the communication circuit is used for communicating with the FPGA, acquiring the power consumption data of the user and sending the power consumption data to the power system.

6. The system for electric energy meter management chip verification of claim 5, wherein the indicator light and the communication circuit are both connected to the FPGA through a resistor.

7. The system for electric energy meter management chip verification according to claim 6, wherein the FPGA comprises a configurable logic module and an input module, the configurable logic module is internally provided with the chip program to be verified, and is connected with the input module, and the FPGA interface comprises a function interface and an output interface; the configurable logic module is connected with the functional interface, and the input module is connected with the output interface.

8. The system for electric energy meter management chip authentication as recited in claim 7, wherein the FPGA further comprises a security module, the security module coupled to the configurable logic module, the security module having a security engine with a cryptographic algorithm built therein.

9. The system for electric energy meter management chip verification according to any one of claims 1 to 8, further comprising a power supply for supplying power to the FPGA, wherein an isolation device is arranged between the power supply and the FPGA.

10. An apparatus for verification of a power meter management chip, comprising a system for verification of a power meter management chip according to any one of claims 1 to 9.

Images