20 results about "Electrical analog" patented technology

The invention discloses a box transformer comprehensive measurement and control protection method integrating electrical quantity and non-electrical quantity monitoring, and the method comprises the steps: collecting the electrical analog quantity of a box transformer, carrying out the discrimination based on a preset electrical quantity protection logic, and generating an electrical quantity protection judgment result; non-electric quantity state signals reflecting the state of the transformer body are collected, judgment is carried out based on preset non-electric quantity protection logic, and a non-electric quantity protection judgment result is generated; according to the electric quantity protection judgment result and the non-electric quantity protection judgment result, comprehensive protection decision making is carried out through collaborative decision logic, and whether a preset protection action condition is met or not is determined; when the comprehensive protection decision result is that the protection action condition is met, a control instruction is output to drive an associated circuit breaker to act; the electrical quantity information and the non-electrical quantity information are placed under the unified collaborative decision framework, comprehensive and rapid response to the box transformer substation fault is achieved, the protection reliability and accuracy are effectively improved, and misoperation or operation refusal possibly caused by a single information source is avoided.

The invention relates to the technical field of industrial automation control, in particular to a full-isolation data acquisition method, circuit and terminal. The acquisition method comprises the following steps: acquiring a non-electric-quantity analog signal through a sensor, and preprocessing the analog signal, including low-pass filtering, common-mode noise suppression and gain programmable amplification. Through the designed Flyback-PFM / PWM hybrid modulation isolation power supply, four paths of mutually isolated low ripple output (the ripple suppression ratio reaches 60dB at 100kHz) are realized under the wide voltage input condition of 8-36V, and a secondary side feedback network is combined with a pi-type filter circuit to effectively suppress the interference of high-frequency switching noise on the reference voltage of a sigma-delta type ADC (Analog to Digital Converter). And the common-mode rejection ratio of the signal conditioning module is improved to 120dB.

The invention discloses a low-voltage loop latent fault real-time monitoring device, which comprises a controller, a current acquisition module, a voltage difference acquisition module, a phase voltage acquisition module, a management machine and a background master station, and is characterized in that the controller is respectively connected with the current acquisition module, the voltage difference acquisition module, the phase voltage acquisition module and the management machine, and the management machine is also connected with the background master station; the controller is further connected with a debugging network port, a B code time synchronization module, a watchdog, a wave recording storage module, a constant value storage module and an external real-time clock, the abnormal loss of the power supply loop is calculated by monitoring the electrical analog quantity of the power supply loop at the start end and the tail end of the power supply branch loop, the abnormal loss is analyzed, the ratio of inter-phase voltage and other data are analyzed, and the real-time performance of the power supply loop is improved. And the abnormal heating problem of the whole power supply branch loop is judged by measuring the electric energy loss, and an alarm is given in advance, so that the latent fault abnormal problem of the low-voltage loop is early warned before a fault occurs.

An optical receive device includes a coherent receiver that outputs an electrical analog signal corresponding to an optical signal, a converter that converts the electrical analog signal into a digital signal, a scrambler that scrambles a differential group delay (DGD) of the digital signal, and an adjustment unit that receives the digital signal output by the scrambler as an input and adjusts one or both of a sampling frequency and a sampling phase of the converter based on a power envelope (PE) method.

Embodiments of the present application disclose an optical computing device and method, relating to the field of information technology, to provide low computing latency optical computing. The device comprises an optical analog domain module, a first optoelectronic conversion module and an electrical analog domain module. The optical analog domain module is configured to receive a first electrical signal and an optical signal, modulate the received optical signal according to the first electrical signal to generate a first optical signal, and send the first optical signal to the first conversion module. The first optoelectronic conversion module is configured to convert the first optical signal into a first electrical analog signal, send the first electrical analog signal to the electrical analog domain module, convert the rearranged first electrical analog signal into a second optical signal, and send the second optical signal to the optical analog domain module. The electrical analog domain module is configured to rearrange the first electrical analog signal, and send the rearranged first electrical analog signal to the first optoelectronic conversion module. The first electrical signal indicates a target weight, and the first optical signal indicates an intermediate calculation result of to-be-calculated data and the target weight.

A nonvolatile memory device includes a memory cell array including a plurality of memory cells connected to a plurality of wordlines and a plurality of bitlines, a row decoder configured to select one of the plurality of wordlines in response to an address, and a wordline leakage current detector configured to determine whether the selected wordline is defective using trim information related to a level of a reference voltage or a gradient of a detect voltage during a test operation, wherein the trim information is stored internally in an electrical die sorting (EDS) process.

The application discloses a Mach-Zehnder modulator-based nonlinear calculation method and system, and relates to the technical field of optical fiber communication, wherein the Mach-Zehnder modulator-based nonlinear calculation method comprises the following steps: loading an optical carrier generated by a laser into an input port of a Mach-Zehnder modulator (MZM); loading a direct current bias voltage into upper and lower arms of the MZM, and loading data requiring nonlinear calculation into the upper and lower arms of the MZM as an alternating current voltage after the data are converted into an electrical analog signal; adjusting a voltage difference of the direct current bias voltage loaded into the upper and lower arms, so that the MZM is in a bias point in different states; and obtaining a nonlinear calculation result according to output optical signals of the bias points in different states of the MZM. The application utilizes different forms corresponding to different bias points of the MZM to realize the nonlinear calculation with fast response time and low energy consumption, and reduces the dependence on electrical devices.

In the method for converting a constant or variable electrical analog signal whose magnitude lies between a minimum value and a maximum value, a first converter unit (10) is provided which has an input (12) and a plurality of outputs (18.1 to 18.8) and a plurality of window discriminators (16.1 to 16.8). The value range between the minimum value (MIN) and the maximum value (MAX) is divided into individual, adjacent sub-ranges. Each window discriminator (16.1 to 16.8) is assigned a different one of the sub-ranges. The analog signal (14) is fed to the input (12) of the first converter unit (10), whereupon the window discriminator (16.1 to 16.8) to which the sub-range within which the magnitude of the analog signal (14) lies is assigned responds. This window discriminator (16.1 to 16.8) outputs at its output (18.1 to 18.8) output the output signal representing the first event, while all other window discriminators (16.1 to 16.8) output the output signal representing the second event at their outputs (18.1 to 18.8), whereby the output signals of all window discriminators (16.1 to 16.8) combined result in a digital signal with a number of bits equal to the number of window discriminators (16.1 to 16.8).

The application discloses a kind of integrated electrical quantity and non-electrical quantity monitoring's box transformer comprehensive measurement and control protection method includes, the electrical analog quantity of box transformer is collected, and it is discriminated based on preset electrical quantity protection logic, generates electrical quantity protection judgment result;Collect the non-electrical quantity state signal reflecting the state of transformer body, and it is discriminated based on preset non-electrical quantity protection logic, generates non-electrical quantity protection judgment result;According to electrical quantity protection judgment result and non-electrical quantity protection judgment result, it is comprehensively protected decision by collaborative decision logic, determine whether to satisfy preset protection action condition;When comprehensive protection decision result is to satisfy protection action condition, output control instruction to drive associated circuit breaker action;The application places electrical quantity and non-electrical quantity information under unified collaborative decision framework, realizes the overall, fast response to box transformer fault, effectively improves the reliability and accuracy of protection, avoids the misoperation or refusal to move possibly caused by single information source.

1.The name of the design product: graphical user interface of crane safety monitoring system for electronic equipment. 2.The use of the design product: an electronic equipment. 3.The design points of the design product: the graphical user interface. 4.The picture or photo that best shows the design points: front view. 5.The human-computer interaction mode of the graphical user interface: the front view is the initial user interface of the crane safety monitoring system, and the interface contains “hoist 1”, “hoist 2”, “luffing”, “rotation”, “trolley”, “low voltage” and “high voltage” function buttons; clicking the “hoist 1” button in the front view, the front view will display various analog parameters of the hoist 1 mechanism in real time; clicking the “hoist 2” button in the front view, the front view will display various analog parameters of the hoist 2 mechanism of the crane in real time; clicking the “luffing” button in the front view, the front view will display various analog parameters of the luffing mechanism of the crane in real time; clicking the “rotation” button in the front view, the front view will display various analog parameters of the rotation mechanism of the crane in real time; clicking the “trolley” button in the front view, the front view will display various analog parameters of the trolley mechanism of the crane in real time; clicking the “low voltage” button in the front view, the front view will display key electrical analog parameters of the low voltage system of the crane in real time; clicking the “high voltage” button in the front view, the front view will display key electrical analog parameters of the high voltage system of the crane in real time; after clicking the corresponding function button, by clicking the button again or clicking the blank area of the front view, the initial user interface display state is restored.

The present application relates to an optoelectronic fusion reconfigurable analog intelligent computing system and a task learning method therefor. The system comprises: an optical analog computing module and an electrical analog computing module, wherein the optical analog computing module is used for performing feature extraction and dimensionality reduction processing on an inputted optical analog signal to obtain an optical feature signal that meets a preset dimension, and the electrical analog computing module is used for converting the optical feature signal into an electrical analog signal and performing computation on the electrical analog signal to obtain an analog computation result. Therefore, by establishing a simulation model, determining a training set on the basis of a current learning task, performing numerical simulation training on the optoelectronic fusion analog computing system by using machine learning and other algorithms, and continuously optimizing parameters during the training to finally successfully complete the current learning task, the present application solves the problem of the limitations of an all-optical artificial neural network and a digital computing processor in completing a machine learning task and realizes advantages of high speed, low energy consumption, high robustness, and reconfigurability.

Embodiments of the present disclosure are directed to an integrated circuit with a photonic processor and an electrical analog memory. The integrated circuit further includes an array of photonic intensity modulators coupled to the photonic processor via a first set of optical connections, and an array of photodetectors coupled to the photonic processor via a second set of optical connections. The electrical analog memory is directly coupled to the array of photodetectors and the array of photonic intensity modulators.

The utility model relates to the technical field of power system safety and training, in particular to a high-voltage electrician operation practical training assessment device which comprises an electrical simulation module, a safety protection module and a practical training assessment module, and the safety protection module and the practical training assessment module are both electrically connected with the electrical simulation module. The electrical simulation module is used for performing operation training of the power system through electrical elements and a wiring mode; the safety protection module is used for cutting off the electrical simulation module and a power supply; and the practical training assessment module is used for displaying the operation training result. According to the utility model, a high-voltage switch cabinet, a transformer, a current transformer, a voltage transformer, a lightning arrester and the like of an actual power system are simulated through electrical elements and a wiring mode, and a highly-simulated working environment is constructed, so that a user can carry out operation training in an environment close to a real condition; and the practical operation capability and the capability of coping with complex conditions can be improved.

To provide an optical receiver capable of accurately compensating for signal distortion without increasing the number of tap stages of an adaptive equalizer.SOLUTION: An optical receiver includes: a receiver to receive an optical signal input via an optical transmission path; a converter to convert an electrical analog signal corresponding to the optical signal into a digital signal; a first compensator to fixedly compensate for a first signal distortion of the digital signal based on a first tap coefficient; a second compensator to adaptively compensate for a second signal distortion of the digital signal that has been compensated by the first compensator, based on a second tap coefficient with a second tap stage number different from a first tap stage number of the first compensator; and a controller to acquire the digital signal output from the first compensator before being input to the second compensator, calculate a third tap coefficient that adaptively compensates for the second signal distortion with the first tap stage number, and update the first tap coefficient of the first compensator based on the first tap coefficient and the third tap coefficient.SELECTED DRAWING: Figure 3

The invention discloses an overhead distribution line tree line grounding fault processing device which comprises a digital electronic transformer connected to a primary and secondary fusion column switch, and the electronic transformer comprises a low-voltage current transformer and an impedance voltage division type voltage transformer. Collected electrical analog quantity signals are preprocessed, preprocessing comprises filtering, transformation and compression, digitalized based on an automatic measurement unit and then transmitted to a feeder terminal, multi-source signal fusion is carried out on the signals, a miniature meteorological station and a tilt angle sensor, and a deep learning algorithm is used for achieving identification of tree line discharge fault features. And automatic processing of grounding faults is realized. The device can effectively improve the single-phase grounding fault processing identification capability of the pole-mounted switch, especially the identification rate of a high-resistance grounding fault, realizes distribution line environment perception, effectively avoids the hidden danger of forest fire induced by potential power factors, and improves the safety, digitization and intelligence level of power distribution network operation.

A quantum random number generator 1 comprises a light source 3 configured to emit a plurality of pulses having randomised intensity values, a combining unit 5 optically coupled to the light source and configured to generate an electrical analog signal so that a signal value of the electrical analog signal equals a combination of the intensity values of the plurality of intensity randomised pulses, and circuitry 7 configured to generate a random number from the electrical analog signal. The combining provides a more uniform intensity distribution (e.g. Figures 6 and 7), so the amount of entropy generated per clock cycle is increased (e.g. Figure 8).

An analog-digital conversion method according to the present invention is a method for converting an optical analog signal into an electrical digital signal, the method including: performing at least one of affine transformation with first reference light and homodyne detection with a detection axis of second reference light on the optical analog signal; converting the optical analog signal subject to transformation or detection into an electrical analog signal by photoelectric conversion; and converting the electrical analog signal into an electrical digital signal by thresholding.

The invention discloses a no-load pressurization test method, a control device and control equipment, and is used for a flexible low-frequency power transmission system, the flexible low-frequency power transmission system comprises a frequency conversion station, the frequency conversion station comprises an industrial frequency transformer, an AC-frequency converter and a low-frequency transformer which are sequentially connected in series, and the low-frequency transformer is connected with a low-frequency power transmission network. The no-load pressurization test method comprises the following steps: acquiring an electrical analog quantity and a switch state of a frequency conversion station; in response to the condition that the line voltage from the frequency conversion station to the low-frequency power transmission network is zero and the switch is switched off, starting an AC-frequency converter; controlling the voltage of the output end of the AC-AC converter to rise to a rated voltage value; controlling the voltage of the output end of the AC-frequency converter to maintain a rated voltage value, and detecting a circuit of the output end of the AC-frequency converter; in response to stable operation of the AC-frequency converter, controlling the voltage of the output end of the AC-frequency converter to drop to zero; and stopping the alternating current-alternating current frequency converter to complete the no-load pressurization test. Detection of a low-frequency side circuit is completed through voltage slow rising and slow falling, and engineering application conditions are met.

The present invention provides a performance monitoring device, an optical signal network with performance monitoring, and a performance monitoring method. The performance monitoring device (100) comprises a coherent receiver (10), an analog-to-digital-converter, ADC (20), a digital signal processing module, DSPM (30), and a noise correction module, NCM (40),the receiver (10) having a second bandwidth that is smaller than the first bandwidth (BW1) such that the receiver (10) is configured to output an electrical analog signal (72) with the second bandwidth based on the received optical signal (71) having the first bandwidth,the ADC (20), being configured to generate from the electric analog signal (72) a digital input signal (73) with the second bandwidth;the DSPM (30) being configured to generate a raw performance monitoring metric, RPMM (74), based on the digital input signal (73);wherein the NCM (40) is configured to generate a performance monitoring metric, PMM (75), based on the digital input signal (73) by compensating distortion in the RPMM (74) caused by the coherent receiver (10) having a smaller bandwidth than the optical signal (71).

An optical receiver includes a receiver to receive an optical signal, a convertor to convert an electrical analog signal into a digital signal, a first compensator to fixedly compensate for a first signal distortion of the digital signal based on a first tap coefficient, a second compensator to adaptively compensate for a second distortion of the digital signal that has been compensated by the first compensator, based on a second tap coefficient with a second tap stage number different from a first tap stage number of the first compensator, and a controller to acquire the digital signal output from the first compensator before being input to the second compensator, calculate a third tap coefficient that adaptively compensates for the second signal distortion with the first tap stage number, and update the first tap coefficient of the first compensator based on the first tap coefficient and the third tap coefficient.