1922results about "Devices using electric/magnetic means" patented technology

An agricultural implement control system, comprising at least one position sensor in association with at least one actuator and a processor in communication with the at least one position sensor configured to determine a position of the at least one actuator. The system where the at least one position sensor comprises a magnetometer and a magnet. The system including a controller wherein is controller is configured to start and stop an implement operation based on the position of the at least one actuator.

An all-terrain vehicle may include a frame and a plurality of ground-engaging members supporting the frame. The all-terrain vehicle may further include a powertrain assembly supported by the frame and shiftable transmission supported by the frame and operably coupled to the powertrain assembly. The all-terrain vehicle may also include a display, a back-up camera, and a controller supported by the frame. The controller may be configured to receive a signal from the shiftable transmission corresponding to the shiftable transmission being in a gear of the plurality of gears other than a reverse gear. Further, the controller may be configured to determine the all-terrain vehicle is moving backwards and send an activation signal to the back-up camera to display images of the back-up camera on the display.

The invention relates to a wheel speed redundancy detection system and method, computer equipment, a storage medium and a vehicle. The system comprises four groups of wheel speed detection modules and a first domain controller, the wheel speed detection module comprises a transmission, a driving motor, a rotary transformer sensor and a motor controller; the transmission is connected with wheels of the vehicle; the driving motor is respectively connected with the transmission and the motor controller; the rotary transformer sensor is arranged on the driving motor and is connected with the motor controller; the motor controller is also connected with the first domain controller, and is used for collecting the resolver signal, obtaining a motor rotating speed according to the resolver signal, and obtaining a corresponding wheel rotating speed according to the gear information of the transmission and the motor rotating speed; the first domain controller is used for performing motion control on the vehicle according to the wheel rotating speed. Redundancy of the vehicle wheel speed signals can be achieved based on the rotary transformer sensor, a wheel speed sensor does not need to be used, and a corresponding sensor wire harness does not need to be added, so that the vehicle using cost can be reduced, and the vehicle development period is shortened.

The invention discloses a motor rotating speed measuring method, system and equipment based on electromagnetic induction, and belongs to the field of motors. According to the embodiment of the invention, firstly, a magnetostriction resonance signal and an electromagnetic induction signal of a motor rotating shaft are obtained; performing frequency domain conversion on the magnetostrictive resonance signal to obtain magnetostrictive resonance frequency domain characteristics; performing frequency domain conversion on the electromagnetic induction signal to obtain electromagnetic induction frequency domain characteristics; frequency domain energy spectrum fusion reconstruction is carried out on the magnetostriction frequency domain characteristics and the electromagnetic induction frequency domain characteristics based on the frequency band matching relation between the magnetostriction frequency domain characteristics and the electromagnetic induction frequency domain characteristics, and a dual-frequency coupling energy spectrum is generated; and finally, determining the rotating speed of the motor rotating shaft according to the frequency position and amplitude distribution of the energy peak in the dual-frequency coupling energy spectrum, thereby improving the measurement precision of the rotating speed of the motor in a complex environment.

The utility model provides a wheel speed sensor signal analysis circuit, which is used for enabling the circuit to be compatible with a standard current type wheel speed sensor and an AK protocol current type wheel speed sensor at the same time, and comprises an overcurrent protection module, a current sampling resistor and a wheel speed signal output module, the overcurrent protection module is used for closing the connection with the wheel speed signal output module when the signal of the wheel speed sensor is short-circuited; the wheel speed signal output module is used for outputting a level signal corresponding to a wheel speed sensor signal; the overcurrent protection module is connected with one end of the current sampling resistor; one end of the current sampling resistor is connected with the wheel speed signal output module; the other end of the current sampling resistor is grounded.

Pulse wheel and system for determining the speed of a vehicle based on a revolution measurement of a wheel of the vehicle. The wheel has a wheel axle which is fixed to a frame of the vehicle and a hub which rotates thereon. A brake disc is connected to the hub. A pulse wheel is attached in a rotationally fixed manner in relation to the hub in the installed state. A measuring device determines the revolutions of the pulse wheel. The pulse wheel has a first material which does not influence the measuring device, and a second material, preferably an electrically conductive material, which influences the measuring device. The measuring device is an oscillator which excites an oscillating circuit, the amplitude of which is damped by the movement of the second material in the alternating electromagnetic field of a coil of the oscillator. An evaluation circuit evaluates the change in the voltage of the oscillating circuit and determines the revolutions of the pulse wheel.

A system for determining the speed of a vehicle based on a measurement of the rotation of a wheel of the vehicle, wherein the wheel has a wheel axle that can be fixed to a frame (11) of the vehicle and a hub (21) rotatable therefrom, and preferably a brake disc (23) rigidly connected to the hub (21). The system comprises a pulse wheel (1) which is fixedly mounted to the hub (21) in the installed state and a measuring device (40) associated with the pulse wheel (1) in the installed state for determining the rotations of the pulse wheel (1). The pulse wheel (1) has two different materials (31, 32), wherein a first material (31) is designed not to have any influence on the measuring device (40), and wherein a second material (32) is an electrically conductive material to have an influence on the measuring device (40).The pulse wheel (1) is wheel- or disc-shaped, with a width (d), a radius (r), and a circumference (U), wherein areas of the first material (31) and areas of the second material (32) are arranged alternately on the circumference (U). The measuring device (40) comprises an oscillator that excites a resonant circuit (44) with a coil and a capacitor, the amplitude of which is damped by the movement of the second material (32) into the alternating electromagnetic field of the coil, and an evaluation circuit (411) configured to evaluate the resulting change in the oscillation amplitude of the voltage of the resonant circuit and to determine the revolutions of the pulse wheel (1).

The invention discloses a signal acquisition and processing system compatible with various automobile wheel speed sensors, which comprises an external wheel speed signal input module, a reference voltage generation module and a comparison output module, and is characterized in that the external wheel speed signal input module is electrically connected with the comparison output module; and the reference voltage generation module is electrically connected with the comparison output module. According to the signal collecting and processing system compatible with the multiple automobile wheel speed sensors, the purpose that the same circuit is compatible with wheel speed signal analysis of the three wheel speed sensors is achieved through voltage conversion in the second resistance value adjusting device, and wheel speed voltage signals are compared with different reference voltages through the comparator; and the output of a wheel speed signal and the diagnosis of open circuit, short circuit to ground, short circuit to a power supply and overcurrent of a wheel speed sensor signal can be carried out, so that the whole circuit is more reliable in use.

The invention provides a high-speed train state acquisition method based on a high-order extended Kalman filter. The method comprises the following steps: establishing dynamic models of a train in different running states; constructing an extended Kalman filter state estimation error covariance matrix of the train after the dynamic models of the train in different running states are utilized; and establishing system models of different running states in the running process of the high-speed train, and acquiring the state information of the high-speed train according to the state estimation error covariance matrix of the extended Kalman filter of the train and the system models. According to the method, deep dynamic analysis is carried out on different running states (such as acceleration, air braking and adhesion braking) of the train, complex dynamic behaviors of the train in the states can be better captured, and the adaptability and reliability of a positioning system under various running conditions are improved.

A sensor system includes a first metamaterial track mechanically coupled to a rotational shaft configured to rotate about a rotational axis, wherein the first metamaterial track is arranged at least partially around the rotational axis, and wherein the first metamaterial track includes a first array of elementary structures; at least one transmitter configured to transmit a first continuous wave towards the first metamaterial track, wherein the first metamaterial track is configured to convert the first continuous wave into a first receive signal based on a rotational parameter of the rotational shaft; and at least one quadrature continuous-wave receiver configured to receive the first receive signal, acquire a first measurement of a first property of the first receive signal, and determine a measurement value for the rotational parameter of the rotational shaft based on the first measurement.

The embodiment of the invention provides a signal processing circuit, a signal processing system and a mobile carrier, which can be particularly used for processing signals of a wheel speed sensor. The signal processing circuit comprises a signal screening circuit, and the signal screening circuit comprises a first comparison element, a second comparison element and a first switch assembly. The first comparison element is used for outputting a first signal larger than a first threshold value, the second comparison element is used for outputting a second signal larger than a second threshold value, and the first signal and the second signal are effective signals of the WSS. When the first signal and the second signal are both output, the first switch assembly is used for outputting effective signals corresponding to two current values in the first signal and the second signal from the first output end and the second output end of the signal screening circuit respectively. Therefore, the circuit is simple, the cost is low, and effective signals with different current values can be screened and output according to wheel speed signals under different protocols.

The invention discloses a variable frequency motor load testing device and method, and relates to the technical field of variable frequency motor testing, and the device comprises a motor testing installation platform, a fastening T-shaped bolt, two variable frequency speed regulation asynchronous motors of the same model, a drum-shaped coupler, two inverters, a rectifier, a three-phase voltage regulator, a frequency converter and an intermediate DC link. According to the invention, two frequency conversion speed regulation asynchronous motors of the same model are coaxially connected, and the power generation electric energy of the accompanying test motor is fed back to an intermediate direct current link through an inverter, so that the cyclic utilization of the electric energy and the dual-motor structural design are realized, complex load equipment does not need to be configured, and the fixed asset investment is reduced; for motors of different models, only corresponding accompanying test motors need to be replaced, the universality is improved, through voltage and current monitoring in an intermediate direct current link and motor rotating speed and torque parameter collection, and by combining a multi-dimensional performance evaluation model, precise evaluation of the motor load performance is achieved, the test efficiency is improved, and the strict test requirements are met.

The embodiment of the invention discloses an aero-engine rotating speed measuring device which is characterized by comprising a tachogenerator module, a hardware conditioning module, a high-speed A / D conversion module, a data picking and buffering module, a digital signal processing module, a rotating speed measuring module, a power supply module, an operation control module and a communication module which are connected in sequence. The tachogenerator module converts an acquired engine rotating speed signal into a sine-wave-like alternating-current voltage signal of which the frequency and the amplitude are positively correlated with the rotating speed. The hardware conditioning module is used for conditioning the sine-like signal with a relatively wide amplitude range into a signal meeting the amplitude range requirement of the high-speed A / D conversion module; the high-speed A / D conversion module performs high-speed sampling on the conditioned sinusoidal-like signal and converts the conditioned sinusoidal-like signal into a digital signal; the data picking and buffering module is used for picking and buffering the digital signals subjected to A / D conversion; the digital signal processing module is used for converting the digital signal into a digital square wave signal; the rotating speed measuring module is used for monitoring the frequency of the digital square wave signal and calculating the rotating speed of the engine through the frequency; and the communication module is used for uploading the engine rotating speed measurement result to the flight control computer. The technical scheme of the invention solves the problem.

The embodiment of the invention provides a measurement angle interpolation method and device of a magnetic encoder, equipment and a storage medium. The method comprises the following steps: acquiring a latest measurement angle obtained by measuring rotation of a motor by the magnetic encoder; calculating a historical angular velocity mean value of the motor according to the historical measurement angle; performing delay compensation on the latest measurement angle based on the historical angular velocity mean value and the system delay time to obtain a delay compensation angle; determining the interpolation coefficient of the current round based on the difference value between the newest measurement angle and the last interpolation angle in the previous round of interpolation angles; according to the delay compensation angle, the historical angular velocity mean value, the current-round difference coefficient and the interpolation number, the current-round interpolation angle is predicted, and the current-round interpolation angle is inserted after the latest measurement angle. According to the method, the difference value between the newest measurement angle and the last interpolation angle of the last round is compared, the interpolation coefficient of the round is dynamically determined, the interpolation strategy is automatically adjusted according to the actual angle change speed, and the method can better adapt to a rapidly-changing motion scene.

The invention discloses an intelligent processing system and method for a magnetoelectric tachometric transducer, and relates to the technical field of engine control, the system comprises an electronic control unit, a signal acquisition circuit, an amplification circuit and a signal calculation circuit; the signal acquisition circuit is used for acquiring a voltage signal output by the magnetoelectric rotating speed sensor; the amplifying circuit is used for amplifying the voltage signal to obtain an amplified signal; the signal calculation circuit is used for calculating the rotating speed of the engine at the second moment according to the amplified signal; the amplifying circuit is used for amplifying the voltage and comprises a numerical control variable resistor; the resistance value of the numerical control variable resistor is controlled by the electronic control unit, the amplification factor is adjusted by adjusting the resistance value, when the rotating speed is low and the signal is weak, the signal amplification factor is large to ensure that the signal can be normally detected, and when the rotating speed is high and the signal is strong, the signal amplification factor is small to reduce the interference signal.

An inertial measurement device includes: an inertial sensor; a first signal processing circuit; a second signal processing circuit; a first communication unit and a second communication unit configured to communicate with an external device; and a mode selection unit configured to select a processing mode from a plurality of modes including a first processing mode and a second processing mode. The first processing mode is a mode in which the inertial measurement device is used alone and outputs a signal processed by the first signal processing circuit from the first communication unit, and the second processing mode is a mode in which the inertial measurement device is used in a state of being coupled to another inertial measurement device, a first signal processed by the first signal processing circuit and a second signal from another inertial measurement device received from the second communication unit are subjected to a calculation process by the second signal processing circuit, and a signal subjected to the calculation process is output from the first communication unit.

The invention provides a voltage amplifier and a preparation method thereof, which can be applied to the technical field of voltage amplifiers. The voltage amplifier method includes: a noise matching transformer including a primary winding, a secondary winding, and a magnetic core, the noise matching transformer being configured with a target number of turns of the primary winding and a target number of turns of the secondary winding, thereby reducing noise of the active amplifier, the target number of turns of the primary winding is determined according to at least one of the first number of turns and the second number of turns, the target number of turns of the secondary winding is determined according to the signal source resistance, the resistance of the primary winding and the single-turn average resistance of the secondary winding, and the primary winding comprises a first tap and a second tap, the secondary winding comprises a positive tap, a negative tap and a center tap; the active amplifier is used for amplifying the signal source voltage according to the gain of the active amplifier, and the gain of the active amplifier is determined according to the target number of turns of the primary winding and the target number of turns of the secondary winding.

A sensor apparatus according to the present embodiment incudes: a mechanism configured to rotate a rotation system around a rotation axis and is provided with an accelerometer having an axis that is not parallel to either a plane perpendicular to the rotation axis or the rotation axis; and a processor configured to acquire an acceleration measured by the accelerometer in response to rotation angles of three or more points of the rotation system rotated, separate the acceleration into a first component that follows the rotation of the rotation system and a second component that does not follow the rotation of the rotation system, and estimate an inclination angle of the rotation system based on the first component and the second component.

In order to determine a rotation angle signal of a DC machine precisely, reliably and in a simplified manner, a method is proposed, wherein combining of a current signal of the DC machine and a voltage signal of the DC machine is used to determine a combined signal; wherein conditioning of the combined signal is used to determine a conditioned signal; and wherein a rotation angle signal is determined by analysing signal oscillations of the conditioned signal.

A method for monitoring, diagnosing and predicting the health of an industrial machine having a rotating component and a sensor coupled to the industrial machine. The method containing the steps of receiving, from the at least one sensor, machine health data corresponding to a current operating condition of the industrial machine; generating, using a machine health module, a machine health status corresponding to the current operating condition of the industrial machine based on the machine health data; and communicating, to an electronic device, a representation of the machine health status. Also disclosed is a method for monitoring a plurality industrial machines having a rotating component; a non-transitory memory containing instructions and statements which, when executed by a processor, cause the processor to perform the method disclosed herein, a system for monitoring an industrial machine having a rotating component and a device to perform the method disclosed herein.

The invention discloses an ultrathin electronic glass roller way speed measurement support and a speed measurement method, and the support comprises a support which is connected to a mounting disc for fixing a supporting roller through a bolt, the support is fixedly provided with an encoder, a detection shaft of the encoder is connected with a connecting disc through a coupler, the connecting disc is clamped at the end part of the supporting roller, and a signal of the coupler is connected with a speedometer. And a driving control system and an alarm of the supporting roller are connected through a linear speed meter. The effect of improving the roller way rotating speed detection precision and frequency is achieved.

The utility model discloses a device used for detecting parameters of a mowing robot, comprising a workbench and a mowing robot, the workbench is provided with a test platform, the mowing robot is installed on the test platform, the device also comprises three-axis electrical parameter modules, the two sides of the test platform are both provided with the three-axis electrical parameter modules, and the three-axis electrical parameter modules are connected with the test platform. The three-axis electrical parameter module is used for detecting information of a wheel set and a cutter head of the mowing robot. The wheel set information of the mowing robot can be collected through the self-resetting wheel speed measurement module, the cutter information of the mowing robot can be collected through the photoelectric sensor, and the information can be collected through the PCB main control board.

The invention belongs to the technical field of gap measurement, and particularly relates to a high-temperature-resistant transparent shell type eddy current tip gap measuring device and method, and the device comprises a sensor probe module, a signal conditioning module, a data collection module and a data processing module. The sensor probe module is mounted on the outer wall of the casing; the sensor probe module comprises a permanent magnet excitation source, a soft magnet magnetic core and a receiving coil; the signal conditioning module is electrically connected with the receiving coil and is used for amplifying, filtering and integrating the weak induction signal; the data acquisition module is electrically connected with the signal conditioning module and converts an analog signal into a digital signal; the data processing module is used for processing the acquired digital signals and extracting blade tip clearance information.

The utility model discloses a current output type AK protocol wheel speed sensor receiving circuit. The current output type AK protocol wheel speed sensor receiving circuit comprises an identification circuit and a voltage conversion circuit used for converting current signals output by an AK protocol wheel speed sensor into voltage signals. The identification circuit comprises a speed pulse identification circuit used for comparing the voltage signal with a first standard voltage and outputting a first square wave signal represented by a high level and a low level. The data bit identification circuit is used for comparing the voltage signal with a second standard voltage and a third standard voltage at the same time and outputting a second square wave signal represented by a high level and a low level, and the speed pulse identification circuit and the data bit identification circuit are both connected with the voltage conversion circuit; wherein the current signal is divided into a high level, a middle level and a low level according to the magnitude of the current, and the magnitude of the first standard voltage and the magnitude of the third standard voltage are between the voltage signal corresponding to the high level and the voltage signal corresponding to the middle level. The size of the second standard voltage is between the voltage signal corresponding to the middle grade and the voltage signal corresponding to the low grade. According to the utility model, the current signal output by the AK protocol wheel speed sensor can be converted into the square wave signal which can be analyzed by a common chip, and the square wave signal can be analyzed only by a common electric appliance element, so that the use of a foreign special chip is avoided, the cost is reduced, and the convenience is improved.

The invention discloses an unmanned aerial vehicle electrical speed measurement system, and the system comprises a photoelectric encoder which is used for collecting first speed data of an unmanned aerial vehicle; the Hall sensor is used for collecting second speed data of the unmanned aerial vehicle; the inertial measurement unit is used for collecting third speed data of the unmanned aerial vehicle; the data fusion module is used for receiving the first speed data, the second speed data and the third speed data acquired by the photoelectric encoder, the Hall sensor and the inertial measurement unit, and performing data fusion on the first speed data, the second speed data and the third speed data to obtain a fusion speed; and the controller is used for receiving the fusion speed and controlling the unmanned aerial vehicle based on the fusion speed. According to the electrical speed measurement system for the unmanned aerial vehicle, speed data of the photoelectric encoder, the Hall sensor and the inertial measurement unit are fused, measurement errors can be greatly reduced, and more accurate speed information can be provided.

Apparatus, systems and processes for detection of objects representing possible projectile hazards in areas of high magnetic fields such as those potentially hazardous ferrous objects which may be moved within the region of forceful magnetic attraction by magnetic resonance imaging (MRI) scanners. The systems and process may include multiple magnetic field sensors and multiple time of flight sensors positioned around a passageway. The time of flight sensors may facilitate determination of movement (e.g., speed and / or direction) of the potentially hazardous ferrous object to provide enhanced accuracy of threat detection.

The invention relates to the technical field of electromagnetic actuator state monitoring, in particular to an electromagnetic valve operation process stability and clamping stagnation detection combined test method, which comprises the following steps of S1, synchronously acquiring a coil current signal, a valve core displacement signal and an outlet pressure pulsation signal; s2, converting the current signal acquired in the S1 into an equivalent electromagnetic force waveform, a speed-acceleration trajectory and a pressure gradient curve; s3, extracting an electromagnetic force zero-crossing distortion rate, an inertia abrupt change point of a speed-acceleration trajectory and an oscillation attenuation coefficient of a pressure gradient curve; s4, calculating a time offset, and generating a primary clamping stagnation early warning; s5, obtaining a stability degradation index; and S6, when primary clamping stagnation early warning is triggered and the stability degradation index exceeds a dynamic threshold value, outputting a conclusion of a clamping stagnation-instability coupling fault. According to the method, high-precision and real-time identification of the clamping stagnation and stability deterioration faults of the electromagnetic valve is realized by fusing the multi-dimensional signal features and a double-criterion judgment mechanism.

The invention belongs to the technical field of rotating machinery signal processing, and discloses a multi-shafting rotating machinery rotating speed estimation method based on a displacement vibration signal, and the method comprises the steps: collecting the displacement vibration signal, and carrying out the short-time Fourier transform to obtain a time-frequency distribution matrix; screening out a safety harmonic set of each shafting based on the estimated rotating speed range; calculating a definition evaluation value of each safety harmonic wave and selecting an optimal harmonic wave as a target tracking harmonic wave; constructing a cost function fusing amplitude and frequency abrupt change penalty, and performing ridge line tracking in the local time-frequency matrix after noise reduction to obtain a preliminary estimation time-frequency curve; and constructing a demodulation phase function based on the curve, performing generalized demodulation and narrow-band filtering on an original signal, extracting a pure harmonic component, and finally reconstructing a final rotating speed curve of a corresponding shaft system through instantaneous phase differential. According to the method, high-precision and anti-interference decoupling and estimation of the rotating speed of each shafting under a strong interference background are realized.

An aircraft wheel and brake assembly includes a wheel, a brake configured to brake the wheel, and a measurement device configured to measure the speed of rotation of the wheel. The brake includes at least one friction member, an actuator support, and at least one brake actuator carried by the actuator support and configured to exert a braking force selectively on the friction member. The measurement device includes a target and a sensing component for producing a measurement signal representative of the speed of rotation of the target. The aircraft wheel and brake assembly is configured in such a manner that, when assembled, the target is constrained to rotate with the wheel and the sensing component is mounted on the actuator support. The target and the sensing component is configured in such a manner that the sensing component detects rotation of the target.

The invention relates to the technical field of vehicles, in particular to a vehicle speed detection method and device, electronic equipment, a target vehicle and a medium. Attribute information of a single-chip microcomputer for collecting the vehicle speed pulse signal in the target vehicle is obtained; determining a clock configuration mode of a capture channel of the single-chip microcomputer according to the attribute information of the single-chip microcomputer; according to the clock configuration mode, the vehicle speed pulse signal is collected in a preset collection mode, and the target pulse width of the vehicle speed pulse signal is determined; and determining the vehicle speed of the target vehicle based on the target pulse width of the vehicle speed pulse signal. The accuracy of the determined target pulse width of the vehicle speed pulse signal is ensured. The vehicle speed of the target vehicle is determined based on the target pulse width of the vehicle speed pulse signal, and the accuracy of the determined target vehicle speed is ensured. According to the method, the clock configuration mode of the capture channel of the single-chip microcomputer is considered, so that the situation that the performance of the single-chip microcomputer cannot meet the vehicle speed collection requirement, the collected vehicle speed cannot cover the whole vehicle speed range, and the collection precision is not high is avoided.