Abrégé

A message registration and subscription method and system, belonging to the field of message publish-subscribe-based software architecture. The message registration and subscription method comprises the following steps: 1) establishing a simulation model to simulate a source target program in a firmware project so as to generate a simulating target program, and the simulation model further simulating the running environment of the source target program by means of an environment support function and, according to a source message registration and subscription function corresponding to the source target program in the firmware project, generating a simulating message registration and subscription function so as to simulate message subscription data acquired by the source target program, the source target program being a program in the firmware project requiring message registration and subscription; 2) establishing a message registration and subscription constant array table; 3) running the simulating target program in the simulation model and, according to the specific running result, adding corresponding message registration and subscription data to the message registration and subscription constant array table; and 4) after the running of the simulating target program ends, storing in the firmware project the message registration and subscription constant array table to which the message registration and subscription data has been added, thus completing message registration and subscription. The present invention creates the simulating running environment of the firmware project by using a software environment outside the firmware project, acquires message subscription information by running the simulating target program in the simulating running environment, generates the message registration and subscription data required by the source target program of a firmware program, then saves same back into the firmware project and stores same in a FLASH space which is more stable and has a lower error probability. In addition, the whole process is automated, thus saving RAM resources, and avoiding the effect of human manual operations on the firmware project.

Classes IPC  ?

• G06F 9/54 - Communication interprogramme
• G06F 8/35 - Création ou génération de code source fondée sur un modèle
• G06F 8/41 - Compilation
• G06F 9/26 - Formation de l'adresse de la micro-instruction suivante

Abrégé

A method and apparatus for evaluating the service life of an electricity meter internal capacitor. According to the method, annual air temperature data within a set number of years is classified into different temperature intervals; air temperature characteristics of each temperature interval are represented by means of a representative temperature value; and a capacitor loss amount is used as an equivalent bridge according to the representative temperature value and the relationship between the service life change of a capacitor and the temperature change, that is, a loss amount of the capacitor after a period of a total equivalent duration at a set environment temperature is equivalent to the total loss of the capacitor after a period of a set number of years in an actual environment, and thus a value obtained by dividing rated service life of the capacitor at the set environment temperature by the total equivalent duration may be equivalent to a set number of years that the capacitor can be maintained at the actual environment temperature, thereby obtaining the actual service life of the capacitor.

Classes IPC  ?

• G06F 17/15 - Calcul de fonction de corrélation
• G01R 31/00 - Dispositions pour tester les propriétés électriquesDispositions pour la localisation des pannes électriquesDispositions pour tests électriques caractérisées par ce qui est testé, non prévues ailleurs

Abrégé

The present invention relates to a low-cost supercapacitor charging circuit and system suitable for a single-phase electricity meter. The charging circuit is used for charging a supercapacitor, and the voltage output from a charging voltage output end is adjusted by means of an output voltage adjustment module connected between a charging voltage input end and the charging voltage output end, such that the voltage at two ends of a supercapacitor to be charged is reduced, and the overall life service index of a single-phase intelligent electricity meter is improved. According to the technical solution provided in the present invention, the current consumed by the charging circuit per se is relatively low, the circuit working state of the charging circuit is stable, the device structure is simple, and the cost is low.

Classes IPC  ?

• H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries
• G06F 1/30 - Moyens pour agir en cas de panne ou d'interruption d'alimentation

Abrégé

A virtual hardware test acceleration method and apparatus for a software function of an electricity meter. The method comprises the following steps: on the basis of a virtual hardware system, generating a preset number of input signals according to a preset input signal rule (S200); obtaining an input signal amount of the virtual hardware system to be tested (S300); and analyzing and comparing the preset number of input signals with the input signal amount of the virtual hardware system to obtain the running status of software to be tested (S400). A virtual hardware apparatus is used to simulate an electricity meter to be tested so as to quickly generate a large number of cases, product function testing is quickly performed on the virtual hardware apparatus, full coverage of trigger signal input is implemented, and a test speed can be accelerated by using the virtual hardware apparatus, so that the present invention can be applied to automated testing of electricity meters and can also be applied to embedded product testing, and has broad application prospects.

Classes IPC  ?

• G06F 11/36 - Prévention d'erreurs par analyse, par débogage ou par test de logiciel

Abrégé

A direct-current metering voltage sampling device for an electric energy meter, the device comprising a first voltage-division module, an optocoupler processing module, a signal amplification module, a second voltage-division module and a sampling signal switching module, which are sequentially connected in series, wherein an input end of the first voltage-division module is respectively connected to a positive electrode and a negative electrode of a voltage sampling terminal of an electric energy meter to be subjected to measurement; the optocoupler processing module performs linear amplification and isolation on a sampling signal which is subjected to voltage division by means of the first voltage-division module, and an output end of the optocoupler processing module automatically adjusts, according to a connection situation of the positive electrode and the negative electrode of the voltage sampling terminal of said electric energy meter, a reference point of an output voltage; the signal amplification module amplifies the sampling signal output by the optocoupler processing module, and outputs the amplified sampling signal to the sampling signal switching module after passing through the second voltage-division module; and the sampling signal switching module performs, according to a preset frequency value, differential processing on a single-path voltage signal output by the second voltage-division module, so as to obtain an equal-amplitude differential signal and output same to a metering chip voltage channel for metering. The device may allow an input signal of a voltage sampling loop to be either a positive signal or a negative signal; and by means of using the isolation characteristic of a linear optocoupler, a short circuit between the voltage sampling loop and a current sampling loop is avoided, such that two situations where the current sampling of a direct-current electric energy meter is connected to a positive electrode or a negative electrode of a power source to be subjected to measurement are compatible.

Classes IPC  ?

• G01R 19/25 - Dispositions pour procéder aux mesures de courant ou de tension ou pour en indiquer l'existence ou le signe utilisant une méthode de mesure numérique

Abrégé

Disclosed are a circuit for improving clock accuracy and a clock. The circuit comprises an MCU controller, a temperature sensor, and a humidity sensor. An output end of the temperature sensor is connected to the MCU controller. An output end of the humidity sensor is connected to the MCU controller. The MCU controller has a clock function. Calculation is performed according to currently received temperature data and humidity data, as well as preset temperature data, humidity data, and an error curve so as to correct the clock accuracy. A clock using the present circuit has higher output accuracy, higher stability, higher product metering accuracy, and reduced costs.

Classes IPC  ?

• G01D 21/02 - Mesure de plusieurs variables par des moyens non couverts par une seule autre sous-classe
• G04F 10/00 - Appareils pour mesurer des intervalles de temps inconnus par des moyens électriques
• G01R 35/04 - Test ou étalonnage des appareils couverts par les autres groupes de la présente sous-classe des instruments pour mesurer l'intégrale dans le temps d'une puissance ou d'une intensité

Abrégé

An electric energy meter service life prediction method and apparatus (700), and a storage medium. The method comprises: determining an impact factor corresponding to each fault mode; acquiring historical failure data of each fault mode, and historical failure data corresponding to each impact factor in each fault mode; according to the historical failure data of the fault mode, obtaining a Weibull distribution model of the fault mode; according to the historical failure data corresponding to each impact factor in the fault mode, respectively obtaining a Weibull distribution model of each impact factor in the fault mode; then obtaining an impact coefficient of each impact factor; and according to the impact coefficient of each impact factor, modifying the Weibull distribution model of the fault mode, and then modifying a prediction failure rate, and predicting the batch service life of an electric energy meter according to the prediction failure rate. According to the method, the impact of the impact factors on the fault distribution is truly reflected, and a more accurate Weibull distribution model of each fault mode is obtained, thereby more accurately predicting the batch service life of the electric energy meter.

Classes IPC  ?

• G01R 35/04 - Test ou étalonnage des appareils couverts par les autres groupes de la présente sous-classe des instruments pour mesurer l'intégrale dans le temps d'une puissance ou d'une intensité

Abrégé

An intelligent meter, comprising a carrier module. The carrier module comprises a module box (2) and a light guide element (3) disposed on the module box (2). The light guide element (3) comprises columnar light guide bodies (1, 34) and a connector (32) that is fixedly connected to more than two columnar light guide bodies (1, 34). A positioning groove (33) or a positioning protrusion is disposed on the light guide element (3). The module box (2) is provided with an adaptive protrusion (21) or an adaptive groove that is adapted to the positioning groove (33) or the positioning protrusion on the light guide element (3). The positioning groove (33) or the positioning protrusion is disposed on the light guide element (3), and the adaptive protrusion (21) or the adaptive groove is disposed on the module box (2) so that the groove (33) and the protrusion (21) cooperate with each other to achieve positioning, thereby reducing the area of a positioning surface. Therefore, positioning accuracy is increased, and the situation in which positioning is difficult due to the area of the positioning surface of the light guide element (3) being large is avoided such that the plug-in installation of the light guide element (3) is relatively simple.

Classes IPC  ?

• G01R 11/04 - BoîtiersBâtis supportsAgencements des bornes

Abrégé

Provided is an on-site fault diagnosis instrument for an intelligent single-phase electric energy meter. When a user does not use electricity or when a current signal collected by a current clamp is almost zero, the fault diagnosis instrument can automatically enable a magnetic latching relay (S1) to close, an output end of an isolation power supply unit generates a virtual load current, and current sampling of the virtual load current can be completed by an intelligent single-phase electric energy meter to be tested and the fault diagnosis instrument. The fault diagnosis instrument can solve the problem of complicated wiring that occurs when a user does not use electricity and an external electric load needs to be connected, and can complete the requirements of on-site fault diagnosis in time, thereby greatly improving the working efficiency of on-site power operation and maintenance personnel.

Classes IPC  ?

• G01R 35/04 - Test ou étalonnage des appareils couverts par les autres groupes de la présente sous-classe des instruments pour mesurer l'intégrale dans le temps d'une puissance ou d'une intensité

Abrégé

Provided are a test system and test method for an intelligent electricity meter. The test system is provided with an analog quantity output end and a digital quantity input end, wherein the analog quantity output end is configured to be connected to an input end of a metering chip of an intelligent electricity meter to be tested, and is used for sending pre-stored voltage and current signals corresponding to an actual load to the metering chip of the intelligent electricity meter to be tested; and the digital quantity input end is configured to be connected to an output end of the intelligent electricity meter to be tested, and is used for acquiring metering data of the intelligent electricity meter to be tested. The acquired metering data is compared with metering data corresponding to the pre-stored voltage and current signals to obtain the metering accuracy of the intelligent electricity meter to be tested. By means of pre-storing voltage and current signals corresponding to an actual load, when a test is performed, actual on-site voltage and current signals can be used for testing an intelligent electricity meter, thereby ensuring the authenticity of test data, and improving the accuracy of a test result.

Classes IPC  ?

• G01R 35/04 - Test ou étalonnage des appareils couverts par les autres groupes de la présente sous-classe des instruments pour mesurer l'intégrale dans le temps d'une puissance ou d'une intensité