7 results about "Pulse computation" patented technology

The application belongs to the technical field of photon imaging detection, and particularly relates to a photon counting imaging detection system based on a mixed anode. The system comprises a vacuum sealed tube detector composed of a window coated with a photocathode, a microchannel plate stack and a mixed anode, and a signal processing circuit. The photocathode is used for converting photons incident through the window into photoelectrons. The microchannel plate stack is used for converting the photoelectrons into electron clouds. The mixed anode comprises a strip anode and a delay line anode arranged orthogonally, and the mixed anode transmits the collected charge short pulses of each channel to the signal processing circuit. The signal processing circuit calculates the two-dimensional coordinates of the photons based on the collected charge short pulses of each channel, and then transmits the two-dimensional coordinates of the photons to a terminal for imaging display. The application provides a photon counting imaging detection system based on a cross strip-delay line mixed anode, and solves the problem that the existing position sensitive anode detector cannot simultaneously have high spatial resolution and high temporal resolution.

The application discloses a kind of based on dynamic pulse discrimination steam turbine speed anti-interference measurement method, it is related to industrial automation control field, the method includes: S1: by the speed sensor of installation in steam turbine rotor speed measuring gear flank alternately changed and generated sine wave signal of tooth valley conversion into digital pulse signal by conditioning circuit;S2: calculate the effective pulse frequency f of this sampling time, to calculate effective pulse cut-off period T;S3: for subsequent new pulse, calculate the time interval Δt between it and the last pulse being judged as effective;If Δt≥T, then determine that the new pulse is effective pulse;If Δt < T, then determine that the new pulse is interference pulse and is rejected;S4: update effective pulse frequency f, calculate the real-time speed of steam turbine, calculate the real-time speed of steam turbine solves the defect that present art relies on hardware filtering and is difficult to eliminate singular interference pulse completely, leading to unreliable speed measurement.

The application belongs to the technical field of incremental learning, and discloses a pulse neural network model construction method for task incremental learning. A gated parameter neuron layer of the pulse neural network comprises: a synaptic current calculation unit for calculating synaptic current of an input neuron at time t based on screened pulses fired by each neuron of a previous layer; a screened mask generation unit for randomly generating a screened mask for each task; a screened membrane voltage calculation unit for multiplying the screened mask and the membrane voltage v t to obtain screened membrane voltage at time t; a pulse firing module for calculating a hidden state membrane voltage based on the obtained gating value and the screened membrane voltage to determine whether a neuron fires a pulse s t ; and a screened pulse calculation unit for calculating the fired screened pulse and transmitting the fired screened pulse to each neuron of a next layer. The application can alleviate the catastrophic forgetting problem of the pulse neural network in task incremental learning, thereby improving the classification accuracy of the model.

This invention relates to the field of laser detection and navigation positioning technology, and discloses a real-time noise reduction and in-situ calibration system and method for laser ranging sensors. The system includes an acquisition module, an extraction unit, a mapping unit, a control unit, and a compensation unit. The system extracts the zero-position calibration pulse generated by reflection within the optical window, calculates the waveform asymmetry parameter to construct a timing compensation operator for the receiving link, and the control unit adjusts the measurement echo detection threshold according to the pulse energy distribution parameter. The compensation unit uses the operator to correct the target echo phase centroid and uses the real-time phase center of the pulse as the timing start anchor point. This invention converts the ranging reference from static setting to dynamic physical reconstruction, and synchronously eliminates clock temperature drift and circuit delay deviation caused by ambient temperature rise during the ranging cycle, thereby eliminating the cumulative error caused by spatiotemporal reference drift in long-distance navigation.

The application relates to a vehicle speed calculation method, system, calculation device and medium, the method comprising collecting a plurality of pulses generated by tire rotation once per preset timestamp, and determining the start time and end time of each preset timestamp; when no pulse generated by tire rotation is collected for a continuous preset duration, recording the current time; determining a target timestamp according to the current time; determining a statistical start time and a statistical end time according to the target timestamp; determining the first number of pulses between the start time and the end time in the target timestamp, and determining the second number of pulses between the statistical start time and the statistical end time; and calculating the vehicle speed according to the average of the first number and the second number. The application solves the problem that a complete tooth pulse cannot be collected through periodic sampling at low speed, so that the effective number of pulses collected by periodic sampling is not necessarily accurate, and the accuracy of the vehicle speed calculated according to the pulses in the period is low.

This invention discloses a data acquisition device for an energy meter based on pulse acquisition, comprising a pulse signal conditioning module, a photoelectric sensor, a multi-channel parallel acquisition unit, and a hybrid communication gateway. The output of the pulse signal conditioning module is connected to the pulse output interface of the energy meter. The photoelectric sensor is used to output pulse signals to the parallel acquisition unit, and the multi-channel parallel acquisition unit is used to send pulse calculation data to the hybrid communication gateway. This invention eliminates the need to replace the energy meter, reducing costs and construction time. Electromagnetic interference is eliminated through photoelectric isolation and RC filtering circuits. An HC32L196K8TA microcontroller is used for pulse counting and power-off protection. It supports RS-485 / 4G-CAT.1 dual-mode transmission and is compatible with photoelectric retrofitting of mechanical meters, direct acquisition from electronic meters, and 485 communication acquisition. A single concentrator supports pulse acquisition management of 48 meters and can be expanded through the 485 interface, reducing the pulse measurement error rate.

The invention discloses a gas classification method and device based on a learnable sensor attention network. The gas classification method comprises a learnable parameter coding module, a dual-scale residual module and a pulse attention module. The learnable parameter coding module introduces a current change rate as an explicit dynamic feature, and endows neurons with the ability to acutely capture gas adsorption and desorption gradients. And the dual-scale residual module realizes multi-level feature extraction of the complex odor manifold through parallel multi-cavity convolution branch. The pulse attention module adaptively searches and enhances cross-channel causal association under the condition of tolerating inherent response delay of a heterogeneous sensor, so that the problem of feature dislocation caused by asynchronous response is effectively solved. Finally, the pulse neural network can deeply explore and fully utilize the spatial-temporal dynamic and potential coupling relation in the sensor array under a low-power-consumption pulse calculation normal form, the robustness of the features is remarkably enhanced, and the recognition performance in a complex scene is improved.