Abstract: A method, an apparatus and a device for simultaneously sampling multiples signals and a medium are provided. The method includes: modulating multiple target input signals with CDM, to obtain a single target analog signal; performing ?? modulation on the single target analog signal to obtain a target digital bit stream; demodulating the target digital bit stream to obtain a target demodulated bit stream; and filtering the target demodulated bit stream to obtain multiple target output signals. With the method, the hardware overhead for simultaneous sampling of multiple-channel signals is reduced while ensuring accuracy. Accordingly, the apparatus and the device, and the medium have the above beneficial effects.

Abstract: Provided are a method, an apparatus and a device for detecting abnormity of an energy metering chip. The method includes: inputting a target self-test signal to a to-be-tested component of a target energy metering chip in response to the target energy metering chip beginning to run under driving of a power signal; acquiring a first output signal from an output terminal of the to-be-tested component, and inputting the first output signal to a notch filter; inputting a second output signal from an output terminal of the notch filter to a signal correlator, and acquiring a third output signal from an output terminal of the signal correlator; and detecting a running state of the to-be-tested component based on the third output signal, to determine whether the target energy metering chip is abnormal.

Abstract: The present disclosure provides a method for encryption programming, including: selecting an encrypted programming file that matches the programmer from a target folder; loading the selected encrypted programming file; if a current number of times for programming of the programmer is greater than or equal to a maximum number of times for programming, destroying the selected encrypted programming file and ending programming; otherwise, decrypting the selected encrypted programming file; if the current number of times for programming of the programmer is less than an initial number of times for programming, replacing the current number of times for programming of the programmer with the initial number of times for programming, otherwise, re-encrypting the decrypted encrypted programming file and programing the re-encrypted programming file into a target chip. A programmer is further provided.

Abstract: A DSP-based electrical energy metering device is provided. After determining a current application mode, a DSP controller compares an execution rate of each computing task with a corresponding preset comparison value, and outputs a first condition value to a condition general register based on a comparison result, so as to control an execution rate of each computing task in the DSP controller. A jump condition controller outputs a second condition value corresponding to the current application mode to the condition general register based on a change in the execution rate of each computing task compared with an execution rate of the computing task in a previous application mode, so that all computing tasks are executed. An adaptive word length controller adjusts an effective bit width of the electrical signal read by a data general register from a data memory at execution rates of different computing tasks.

Abstract: A method, an apparatus, and a device for detecting abnormality of an electric signal. The method includes: sampling the electric signal at each of sampling points in unit sampling intervals, to obtain a sampling value; counting abnormal sampling points within each of the unit sampling intervals to acquire a quantity of abnormal points, where each of the abnormal sampling points is one of the sampling points at which the sampling value is out of a threshold range of the electric signal; determining each of the unit sampling intervals, within which the quantity of abnormal points is larger than a quantity-of-abnormal-point threshold, to be an abnormal unit sampling interval; counting the abnormal unit sampling intervals that are consecutive, to acquire a quantity of consecutive abnormal intervals; and determining that the electric signal is abnormal, in response to the quantity of consecutive abnormal intervals being greater than a quantity-of-abnormal-interval threshold.

Abstract: An instrumentation amplifier includes: a capacitive feedback closed-loop amplifier, an input capacitor charging module, a feedback capacitor discharging module, a noise separation module and a logic controller. The capacitive feedback closed-loop amplifier includes a fully differential operational amplifier, a first input capacitor, a second input capacitor, a first feedback capacitor and a second feedback capacitor. The input capacitor charging module is configured to charge the first input capacitor and the second input capacitor periodically. The feedback capacitor discharging module is configured to discharge the first feedback capacitor and the second feedback capacitor periodically. The noise separation module is configured to separate a noise from a signal using a chopping modulation technology. The logic controller is connected to the input capacitor charging module, the feedback capacitor discharging module and the noise separation module to control the modules to operate.

Abstract: A communication hub system is provided, which includes a wireless communication unit, a power line communication unit and a host unit. The wireless communication unit supports multiple preset wireless standards, and selects, based on a wireless network time-division multiplexing rule, the wireless standard corresponding to a target communication device for performing signal transmission and receiving. The power line communication unit supports at least one preset power line standard, and receives or transmits a signal via a power line. The host unit controls to select the power line communication unit and/or the wireless communication unit to perform the signal transmission and receiving under a target standard.

Abstract: An instrumentation amplifier includes: a capacitive feedback closed-loop amplifier, an input capacitor charging module, a feedback capacitor discharging module, a noise separation module and a logic controller. The capacitive feedback closed-loop amplifier includes a fully differential operational amplifier, a first input capacitor, a second input capacitor, a first feedback capacitor and a second feedback capacitor. The input capacitor charging module is configured to charge the first input capacitor and the second input capacitor periodically. The feedback capacitor discharging module is configured to discharge the first feedback capacitor and the second feedback capacitor periodically. The noise separation module is configured to separate a noise from a signal using a chopping modulation technology. The logic controller is connected to the input capacitor charging module, the feedback capacitor discharging module and the noise separation module to control the modules to operate.

Abstract: Devices and methods for accurately realizing the integration functions, in particular for energy metering systems using a Rogowski coil, are disclosed. In this regard, exemplary embodiments of the present invention may be constructed as two stable filters for the current (I) and voltage (U) channel. In the analog realization form, the transfer function of the voltage channel may be constructed as a high-pass filter function with at least one zero at the origin, while the transfer function of the current channel may be constructed as the multiplication of the high-pass filter function of the voltage channel and the ideal analog integration function.

Abstract: Devices and methods for accurately realizing the integration functions, in particular for energy metering systems using a Rogowski coil, are disclosed. In this regard, exemplary embodiments of the present invention may be constructed as two stable filters for the current (I) and voltage (U) channel. In the analog realization form, the transfer function of the voltage channel may be constructed as a high-pass filter function with at least one zero at the origin, while the transfer function of the current channel may be constructed as the multiplication of the high-pass filter function of the voltage channel and the ideal analog integration function.