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

The invention relates to a TEC-based automatic calibration method and device for an infrared thermal imager. During the calibration process of an infrared thermal imager, the suspected pixels in each temperature range of the infrared thermal imager are measured, and the suspected pixels in each temperature range are measured. The pixel is used as the dead point, and the remaining suspected pixels are used as unstable pixels at each temperature point; during use, the processing circuit acquires the image of the infrared thermal imager, completes the non-uniformity correction, obtains the dead point position, and obtains the current temperature; According to the current temperature, look for unstable pixels; directly compensate for the dead point position in the image; judge whether the unstable pixel is a blind pixel, if so, perform compensation, otherwise do not process. The present invention calibrates dead points and unstable pixels for all temperature points and completes non-uniformity correction at the same time. In the process of use, it is not necessary to carry out blind element judgment for each image, and directly adopts corresponding values ​​for dead points and unstable pixels. The compensation method is used for compensation, the processing is simple, and the real-time performance is good.

The invention provides a method and system for coning error compensation based on flow-type rotation vector. The method includes: analyzing the coning error generation mechanism of laser inertial navigation based on the attitude transfer matrix of laser inertial navigation; and establishing a mathematical model of coning error under the condition of coning motion , deduce the flow-type rotation vector structure for compensating the coning error; determine the coning error compensation term coefficients of different sub-samples in the flow-type rotation vector structure; based on the angle increment of the current sampling period and the angle increment of the historical sampling period, use the flow The rotary vector structure realizes the online compensation of the coning error. The invention provides a flow-type rotation vector algorithm based on laser gyroscope angle incremental output, which ensures the compensation accuracy of the laser inertial navigation system cone error and at the same time increases the update frequency of the system attitude, reduces the cone error introduced by the algorithm, and finally realizes the improvement of the system attitude solution. frequency and accuracy purposes.

The invention discloses a gravity compensation vertical subsystem control method based on a slip form face. A gravity compensation vertical subsystem composed of a controller, a sensing unit, an executer and a spring module is provided. A coordinate system is established based on a working principle of the gravity compensation vertical subsystem. The system is modeled through a lagrange equation, a model is simplified, and a simplified spring mass system with the interference, model indeterminancy and outside motivation is obtained. According to the characteristics of the system model, a PID algorithm, a PISS algorithm and a PISST algorithm suitable for different task requirements are given according to the different task requirements. The three algorithms are integrated, algorithm selection is finished by setting parameters of the controller, and a criterion for parameter adjustment of the three algorithms is given. The gravity compensation vertical subsystem control method has the beneficial effects that a tension sensor and a displacement sensor are comprehensively applied, the compensation precision is improved, the comprehensive degree of the controller is high, and parameters are easy to adjust.

The invention relates to an ambient light compensation circuit for an infrared receiving device, comprising a potential detection unit, a voltage integration unit and a voltage-current conversion unit connected in sequence, wherein the potential detection unit is used to receive a first voltage signal (VSAM) , and compare the first voltage signal (VSAM) with the reference voltage; the voltage integration unit includes a first switch (SW1) for controlling the charging of the capacitor and a second switch (SW2) for controlling the discharging of the capacitor, according to the output of the potential detection unit The signal controls the first switch (SW1) and the second switch (SW2), so as to charge or discharge the capacitor to output a second voltage signal (VX), and the voltage-current conversion unit is used to convert the second voltage signal ( VX) is converted to output compensation current. The invention can realize ambient light current compensation and realize stable gain.

The invention discloses a compensation device of a high-precision positioning tool for workpiece machining. The compensation device includes a base, one end of the base is connected with a detection assembly, and the other end is connected with a fixing assembly; the detection assembly is used for detecting the position of a cutter and feeding back to a control center to adjust the cutter, and thefixing assembly is used for fixing the base and the detection assembly to a machining device. The compensation device is stable in structure, is flexible and reliable, and is convenient to disassemble and assemble; with the arrangement of a sealing protection device, a sensor can be protected from being polluted or damaged by the processing disintegrating slag at any time; a cleaning device is additionally arranged in the sealing protection device, the sensor can be guaranteed to be clean further, so that the precision of the sensor is guaranteed, and the compensation precision is guaranteed;in addition, the sensor is installed in an automatic telescopic device, the full-automatic control is achieved; the sensor is matched with the sealing protection device, so that the sensor is more intelligent; the fixing assembly is arranged at the tail of the base, so that the compensation device can be installed outside various large complex machine tools, and the universality is high.

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 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 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.