31results about How to "Guaranteed Compensation Accuracy" patented technology

The invention discloses an active power filter selective harmonic compensation control method based on a frequency self-adaptive resonant controller. The active power filter selective harmonic compensation control method comprises the steps of acquiring power grid voltage, load current, active power filter output current and active power filter direct-current-side voltage; controlling output through an independent direct current control and independently controlling harmonic current through an independent control fundamental current according to a load signal; obtaining a modulation signal according to fundamental current control output and harmonic current control output and generating a switch signal of a controlling grid-connected inverter according to the modulation signal. The active power filter selective harmonic compensation control method can achieve selective harmonic compensation to load harmonic current and keep the compensation effect at rated frequency under the power grid frequency fluctuation condition.

The invention provides a method for compensating heterogeneity of a shield magnetic field coil through a winding. The shield magnetic field coil is wound by the compensating winding with the particular specification, and distribution of magnetic lines of force of an original magnetic field coil is changed through the compensating winding, so that the heterogeneity of the shield magnetic field coil is increased in a magnitude mode. The magnetic field generated by the compensating winding has equal magnetic force and the opposite direction with the heterogeneous field additionally produced because a magnetic shield layer changes distribution of the magnetic lines of force in the magnetic field coil, and therefore the purpose of compensating the heterogeneity of the shield magnetic field is achieved.

The invention discloses a probe of an eddy current sensor and the eddy current sensor. The probe of the eddy current sensor includes a detection coil, a temperature compensation coil and a magnetic isolation plate; the magnetic isolation plate is arranged between the detection coil and the temperature compensation coil, and is respectively connected to the detection coil and the temperature The compensation coils are parallel. The invention solves the problem that the temperature compensation precision of the current eddy current sensor is increased at the cost of increasing the probe, realizes reducing the probe size on the basis of ensuring the compensation precision, and achieves the effect of ensuring the detection displacement sensitivity and reducing the probe size.

An exoskeleton robot motor self-check correction system and a method are provided; the motor comprises a drive module driving an exoskeleton robot body; the drive module comprises a servo motor and a motor self-check correction module; the self-check correction method comprises the following steps: starting the self-check correction module before a rehabilitation user uses the exoskeleton robot to carry out rehabilitation training every day; using a hall sensor to record a self-check error compensation value everyday; forming a compensation value under each rehabilitation training mode according to the recorded error compensation value; aiming at motor corrections of temporarily added novel training steps and following each training step under the rehabilitation training mode, the corresponding motor compensation values are given. The motor self-check correction steps are simple, thus satisfying rehabilitation training precision high requirements of the exoskeleton robot.

The invention discloses a wireless signal compensation method and device, a numerical value determination method and device, equipment and a storage medium. The wireless signal compensation method isused to compensate wireless signals, and comprises the steps of: obtaining a group of target parameter values of a corresponding fitting function for wireless signal compensation according to the current state information, wherein the group of target parameter values comprises a first number set for amplitude compensation and/or a second number set for phase compensation; determining a target compensation coefficient of at least one frequency component of the wireless signal according to the fitting function and the group of target parameter values; and compensating the corresponding frequencycomponent in the wireless signal by using the target compensation coefficient of each frequency component to obtain a target signal.

The invention relates to a fiber-optic gyroscope zero offset determination method. The method comprises the following steps: S1, obtaining a zero-bias temperature rise model table and a zero-bias temperature drop model table under a preset temperature change rate; s2, querying a zero-bias heating model table and a zero-bias cooling model table, and obtaining a heating zero-bias value and a cooling zero-bias value corresponding to the current environment temperature of the tested fiber-optic gyroscope; s3, calculating a zero-bias heating model weight and a zero-bias cooling model weight corresponding to the current temperature; and S4, carrying out weighted operation on the temperature rise zero-bias value and the temperature drop zero-bias value corresponding to the current temperature obtained in the step S2, and finally obtaining the gyroscope zero-bias value of the fiber-optic gyroscope at the current environment temperature and the temperature change rate. The weighted zero-bias compensation value can be calculated in real time according to the temperature, the temperature rising and falling trend and the temperature change rate, the problem that a traditional zero-bias compensation method is poor in environmental adaptability is solved, and the method is suitable for zero-bias modeling and compensation of fiber-optic gyroscopes of different models or precisions.

The invention relates to an ambient light compensation circuit for an infrared receiving device. The circuit comprises a potential detection unit, a voltage integration unit and a voltage-current conversion unit which are connected in sequence, wherein the potential detection unit is used for receiving a first voltage signal (VSAM) and comparing the first voltage signal (VSAM) with a reference voltage; the voltage integration unit comprises a first switch (SW1) for controlling the charging of a capacitor and a second switch (SW2) for controlling the discharging of the capacitor, and the first switch (SW1) and the second switch (SW2) are controlled according to an output signal of the potential detection unit, so that the capacitor is charged or discharged to output a second voltage signal (VX); and the voltage-current conversion unit is used for converting the second voltage signal (VX) to output a compensation current. According to the invention, the ambient light current compensation can be realized, and the stable gain is realized.

The invention relates to a band gap reference voltage circuit. The voltage VDD is divided into three paths; the first path is connected with an emitter of a triode T2 through a resistor R1, and a base of the T2 is connected with a collector and then is grounded; the second path is connected with an emitter of a triode T1, and a base of the T1 is connected with a collector and then is grounded; the third path is grounded through resistors R4 and R2, and a voltage Vref output point is positioned between the resistor R4 and the resistor R2; and the first path and the second path are connected to the input end of an operational amplifier OP, and the input end of the OP is grounded through a resistor R3, and the output end of the OP directly controls a constant current source circuit. The band gap reference voltage circuit has a startup enhancing function.

The invention discloses a bending machine deflection compensation workbench with wedge blocks integrally connected. The deflection compensation workbench comprises a groove type base and a cover platearranged at the upper end of the base; the groove bottom of the groove type base is provided with a wedge block installation plate, the multiple lower wedge blocks and the multiple upper wedge blocksfrom bottom to top in sequence; and the upper end surface of the wedge block installation plate is provided with a plurality of concave grooves in the length direction of the wedge block installationplate, the multiple lower wedge blocks are embedded in the multiple concave grooves correspondingly so that the lower wedge blocks and the installation plate can be connected into a whole, the upperwedge blocks are installed on the upper end surfaces of the lower wedge blocks in a matched mode by adopting inclined surfaces different in angle, and the end of the installation plate is connected with a driving motor. According to the technical scheme of the invention, integral deflection compensation is achieved, the integral compensation precision of the workbench is ensured, in addition, thestructure is simple, disassembling is convenient, and the cost is low.

The invention relates to a cable automatic calibration and automatic compensation method for comprehensive detection equipment; the method employs an operation terminal, the comprehensive detection equipment, a power meter, a signal generator and a switch to carry out automatic calibration and automatic compensation of a cable. The method comprises the following steps: firstly, obtaining power calibration data of the signal generator, then connecting one end of the cable to an output port of the signal generator, and connecting the other end of the cable with the power meter; and setting parameters required to be calibrated of the cable in a cable automatic calibration function of the operation terminal, selecting measured power calibration data of the signal generator, starting automatic calibration work of the cable, and automatically generating a power compensation value of each frequency point after the cable is calibrated. According to the invention, automatic calibration of a self-defined frequency band can be carried out on any type of cables, corresponding cable compensation files can be stored, and real-time loading of other cable data and modification of cable compensation data can be supported.

The invention relates to the field of high-voltage circuit breakers, in particular to a self-powered circuit breaker and an air cylinder assembly thereof. The self-powered circuit breaker comprises an air cylinder assembly, wherein the air cylinder assembly comprises an air compression chamber air cylinder and an expansion chamber air cylinder; one end of the air compression chamber air cylinder is closed by a valve base, and the other end of the air compression chamber air cylinder has an open structure; the expansion chamber air cylinder is spliced into the open end of the air compression chamber air cylinder; one end, which is inserted into the air compression chamber air cylinder, of the expansion chamber air cylinder is further provided with a cylindrical extension segment; the valve base is provided with a convex compensating structure for being inserted into the expansion chamber air cylinder; and the size of the compensating structure is equal to the volume of the extension segment. In the self-powered circuit breaker, a plurality of contact fingers can be arranged correspondingly between the expansion chamber air cylinder and the air compression chamber air cylinder according to requirements, so that the resistance of a main loop is reduced, and the temperature rise of the circuit breaker is further reduced; and the size of the expansion chamber air cylinder does not change, so that the original short-circuit breaking performance of the circuit breaker is ensured.

A precise compensation method for a clock source relates to the field of clock compensation, and comprises the following steps: taming self-learning data, removing abnormal data, respectively separating temperature and frequency drift characteristics, respectively fitting frequency drift and temperature characteristic curves by adopting a multi-time curve fitting mode, and in a time keeping process, and selecting the optimal characteristic for automatic separate compensation. High-precision time keeping is realized, and the problems that a traditional time keeping algorithm adopts a least square method for curve fitting, the learning accuracy is low, frequency drift and temperature of a frequency source are not separated, and the problems that the consistency of the traditional compensation effect is low and the multiple tests are highly random are solved.