30results about How to "Realize self-calibration function" patented technology

The invention discloses a radio frequency signal generating and radio frequency power detecting device. The invention comprises a radio frequency signal generating unit, which is used to generate the radio frequency signal with required frequency and power; a radio frequency signal power detecting unit, which is used to receive the radio frequency signal generated by the radio frequency signal generating unit or the radio frequency signal from the external, and to perform power detection; a radio frequency signal channel switching control unit, which is used to control the make-and-break of the input / output interface and the switching of the radio frequency signal generating unit and the radio frequency signal power detecting unit; a control unit, which is used to receive command through the interface unit, to control the radio frequency signal generating unit and the radio frequency signal power detecting unit; and an input / output interface, which is used for the input / output of the radio frequency signal. Through the adoption of the invention, the high accuracy power detection with low cost and high flexibility can be realized, and simultaneously the self calibration function can be realized, to acquire the output of the radio frequency signal with high accuracy.

The invention relates to an orthogonal mismatch calibration method and device of a direct frequency conversion transmitter. The orthogonal mismatch calibration device comprises a first voltage comparator, a second voltage comparator, a first switching circuit, a second switching circuit, a digital state machine, a low-pass filter, a gain fine-tuning circuit and a phase fine-tuning circuit. The output end of a passive frequency mixer is connected with the input end of the low-pass filter, and the output end of the low-pass filter is connected with a first input end of the second voltage comparator. The gain error and the phase error between same-phase / orthogonal channels of the direct frequency conversion transmitter are measured with the orthogonal mismatch calibration method and device; the optimal calibration value is obtained through successive approximation, the self-calibration capacity of orthogonal mismatch of the direct frequency conversion transmitter can be improved, and dependency, complexity and power consumption of a calibration system are lowered.

The invention relates to a capacitive micro inertial sensor with a self calibration function. An existing sensor with the self calibration function is small in calibration range. According to the capacitive micro inertial sensor with the self calibration function, one sensor mass block is a rectangular silicon slice etched with grid-shaped wells, two corresponding ends of the sensor mass block are connected with anchor points through silicon supporting beams, and rectangular silicon strips are respectively arranged the other two corresponding ends of the sensor mass block. Two driver mass blocks are arranged at two sides of the sensor mass block, an annular groove is formed in the middle of each driver mass block in an engraved mode, movable mass block driving silicon strips and driver driving silicon strips are arranged at two sides of each driver mass block, and the silicon strips connected with the sensor mass block form a mass block driving capacitor along with the corresponding mass block driving silicon strips. Comb tooth strips fixing the driving silicon strips and the movable driver driving silicon strips form a driver driving capacitor. Comb-shaped silicon strips and fixed detection silicon strips connected with the sensor mass block, a grid electrode and an interdigital aluminum electrode on the surface of a substrate form a detecting capacitor. The capacitive micro inertial sensor with the self calibration function increases the mass block driving capacitance, further reduces driving voltage, increases the mass of an oscillator, and reduces Brown noise.

An active array antenna calibration system, a method, an apparatus, and an active array antenna system are provided. The calibration system includes a calibration cable,a power splitting and combininglink and a calibration detection module. The calibration detection module comprises a calibration signal baseband processing chip and a radio frequency transceiver unit connected with the calibration signal baseband processing chip. The calibration cable is respectively connected with the transceiver links of each transceiver radio frequency single board and collects calibration signals of the transceiver links of each transceiver radio frequency single board. The power splitting and combining link is connected with the calibration cable and the calibration detection module, and the calibration signal collected by the calibration cable is sent to the calibration signal baseband processing chip, and the calibration signal baseband processing chip performs calibration processing. Or the original signal is sent to the antenna baseband processing chip of each RF single board, and the antenna baseband processing chip performs calibration processing. The invention realizes the self-calibration function of the multi-channel antenna array through the internal link of the equipment, thereby optimizing the antenna coverage range and the effect.

The invention discloses a control driving system for a universal rack, which can realize stable and reliable rack rotation control and high control precision. A photoelectric encoder and a potentiometer are arranged on the rack and a motor respectively, two measurement angle values are calibrated through an angle calibration module, and thus, a self-calibration function is realized; in the case of automatic control, when the rack moves near a target angle, different operating frequencies are transmitted to a frequency converter according to the difference between the current angle and the target angle, the relationship between the angle difference and a motion speed can simulate a damped motion curve, the motion speed of the rack just reaches 0 when the rack moves to the target angle, and thus, zero overshoot control is realized, and the rotation precision is high; and through detecting the position of a treatment couch in real time through an automatic anti-collision control unit and an anti-collision and anti-over turning control module, collision between the rack and the treatment couch is automatically prevented.

The invention discloses a ground resistance monitor with self-inspection and self-correction functions. The ground resistance monitor comprises a main circuit and a switching circuit connected with the main circuit, wherein the switching circuit is further connected with an external ground network and a standard resistor respectively. A high-precision standard resistor analog ground network is added into a circuit board, a circuit which originally tests the external ground network is switched to the standard resistor on a test board through a relay switching circuit, and if a deviation existsbetween a measured value and a preset standard resistance value, fine adjustment can be realized in a program and an offset is added to the measured value so as to reach a normal value; if a relatively large deviation exists between the measured value and the standard value, equipment has a relatively large problem and is required to be returned to a factory for repair. The switching circuit adopts the structure as follows: four double-pole double-throw relay switches are used. After adoption of the ground resistance monitor, a technician can remotely know the working state of the equipment and can perform remote correction when measurement data has a deviation.

The invention discloses an air humidity measurement method with low power consumption. The method comprises the following steps of: allowing a fixed resistor and a humidity-sensitive capacitor to form a resistor-capacitor (RC) circuit, allowing the RC circuit, a comparator in a microcontroller chip and a timer module to form a measuring circuit, and respectively measuring count values of a timer in two humidity states when the humidity-sensitive capacitor is charged to certain voltage and an output end of the comparator in the microcontroller chip produces input capture interruptions of the timer in a standard humidity environment; and saving humidity values and the corresponding count values in a storage of equipment, and effectively establishing the linear relation between the humidity and a count value, so that a measured practical humidity value is accurately calculated according to the measured count value in the practical use. The measurement method is simple, low in cost and power consumption and high in measurement accuracy, precision values can be adjusted according to application requirements, the self-correction can be performed, and the industrialized batch production of temperature and humidity instruments are convenient.

A multiple-freedom-degree floating electric connector with a self-calibration function comprises a plug (1) and a socket (2), and is characterized in that the socket (2) comprises the components as follows: a secondary positioning pin (11), an after-pin insulator (13), a Phi12 contact pin (14), a Phi6 contact pin (15), a before-pin insulator (16), a Phi3 contact pin (18) and a lug casing (19). According to the multiple-freedom-degree floating electric connector with the self-calibration function, the problems of unreliable electrical connection or electrical connection failures caused by multiple-freedom-degree changes such as displacement, torsion and the like produced by a battery in any direction or at any angle of an installation carrier can be solved; at the same time, damage caused by vibration and impact can be effectively eliminated; the electric connector has the characteristics that the electric connector can be connected and separated rapidly, the operation is convenient, the mechanical property is good, the electric connection is reliable, and the like; and the electric connector has larger economic and social values.

Detector data representative of an intensity of light that impinges on a detector after being emitted from a light source and passing through a gas over a path length can be analyzed using a first analysis method to obtain a first calculation of an analyte concentration in the volume of gas and a second analysis method to obtain a second calculation of the analyte concentration. The second calculation can be promoted as the analyte concentration upon determining that the analyte concentration is out of a first target range for the first analysis method.

The invention relates to a fringe effect based capacitance type micro inertial sensor with self-calibrating. The existing sensor having the self-calibrating function is small in calibrating range. Sensor blocks are rectangular silicon wafers etched with grid-shaped wells; four corresponding ends are connected with anchor points through silicon supporting beams; the four corresponding ends are correspondingly provided with rectangular silicon strips in the same number; comb type silicon strips which are connected with the sensor mass blocks, fixed detection silicon strips, grid-shaped electrodes and grid-shaped aluminum electrodes on the surface of a substrate are formed into detection capacitance. When acceleration speed signals are loaded in the mass block sensitive directions, silicon strip groups on the sensor mass blocks cut electric field lines of substrate fringe electric fields and then the substrate fringe capacitance is changed; the size of the loaded acceleration speed is detected due to detection of the capacitance change of the micro inertial sensor. The existing sensor having the self-calibrating function has the advantages of increasing vibrator quality, reducing pull-in and brown noise, increasing detection capacitance and reducing pressed film air damping.

The invention belongs to the field of image processing and computer vision, and relates to an infrared stereo camera dynamic external parameter calculation method based on histogram equalization. Because the imaging of the infrared camera is different from the imaging of the visible light camera, the number of point pairs which are obtained by directly extracting feature points for matching and meet requirements is small. In order to solve the problem, feature points of a left infrared camera and a right infrared camera are extracted and matched, and an original calibration result is correctedaccording to the feature points. Besides, in order to solve the problem of insufficient feature points, feature point extraction is carried out on an original image, and feature point extraction is also carried out on an infrared image after gray histogram equalization. According to the invention, the change of the position relationship of the infrared binocular camera caused by factors such as temperature, humidity and vibration is solved. The method has the advantages of high speed, accurate result, simple operation and the like.

The invention discloses an elevator sensor self-calibration system. An elevator control mainboard and a measuring module are included; the measuring module comprises a sensor and a processor; the elevator control mainboard is used for sending a measuring instruction to the processor; the sensor is used for acquiring static data of an elevator and transmitting the static data to the processor; andthe processor is used for receiving the measuring instruction sent by the elevator control mainboard, controls the sensor to acquire the static data of the elevator and processes the static data, andthe self-calibration process is completed according to the static data acquired by the sensor. The invention further discloses an elevator sensor self-calibration method. By adopting the processor toprocess the static data of the elevator acquired by the sensor and complete the self-calibration process, static errors are eliminated, it is achieved that the sensor is calibrated in real time, the calibrating operation is easy and fast, the function expansibility is high, and cost is low.

The invention discloses a radio frequency signal generation and radio frequency power detection device, comprising: a radio frequency signal generation unit, used to generate a radio frequency signal with required frequency and power; a radio frequency signal power detection unit, used to receive the radio frequency signal generated by the radio frequency signal generation unit RF signal or external input RF signal, and power detection; RF signal path switching control unit, used to control the on-off of the input / output port and the switching of the RF signal generation unit and the RF signal power detection unit; the control unit, used The interface unit is used to receive commands to control the radio frequency signal generation unit and the radio frequency signal power detection unit; and the input / output port is used to output / output radio frequency signals. By using the invention, low-cost, high-flexibility and high-precision power detection can be realized, and at the same time, the self-calibration function can be realized to obtain high-precision radio frequency signal output.

The invention relates to a self-calibration method for realizing an optical voltage sensor, which relates to a self-calibration method for a sensor. A reference voltage source is designed to realize a self-calibration function of the optical voltage sensor. By using the current optical voltage sensor, measurement precision and temperature stability are low. By using the optical voltage sensor of the invention, the above problem can be solved. In the invention, a discrete Fourier algorithm is used to acquire an effective value of a voltage signal. Through adding a calculation sample number and windowing processing, influence of frequency fluctuation on effective value calculation can be reduced and the stability of a self-calibration coefficient can be increased. An optical voltage sensor measurement result is affected by a temperature. By using an optical current sensor in the invention, the above problem can be solved. Through testing, the measurement precision reaches an IEC 0.2 grade measuring requirement in a temperature scope of minus 40-60 DEG C. The sensor and the method are suitable for designing a voltage transformer.

The invention discloses a self-calibration combined type water level gauge. The gauge is used for measuring the water level of a boiler drum and comprises a double-color water level gauge; the double-color water level gauge comprises a water level gauge body; the top of the water level gauge body is provided with a steam side connecting pipe, and the lower part of the water level gauge body is provided with a water side channel; the gauge further comprises a separation membrane box differential pressure transmitter and an integrator; the separation membrane box differential pressure transmitter comprises a low-pressure membrane box, a high-pressure membrane box and a differential pressure transmitter; the signal output end of the differential pressure transmitter is connected with the signal input end of the integrator; the gauge also comprises a first temperature sensor, a first pressure sensor, a second temperature sensor and a second pressure sensor, wherein the first temperature sensor and the first pressure sensor are installed on the steam side of the boiler drum, and the second temperature sensor and the second pressure sensor are installed on the water side of the boiler drum; the signal output ends of the first temperature sensor, the first pressure sensor, the second temperature sensor and the second pressure sensor are connected with the signal input end of the integrator. After the method is applied, the water level in the boiler drum can be visually known, and the real water level in the boiler drum can be relatively accurately mastered.

The invention discloses an impeller detecting system and method for a range hood. The range hood comprises a motor, a volute and an air flue, wherein the volute is communicated with the air flue; an impeller is arranged inside the volute; and the motor is used for driving the impeller to rotate. The impeller detection system comprises a magnetic element, a magnetic field detection module and a range hood main control unit, wherein the magnetic element is arranged on the impeller; the magnetic field detection module and the range hood main control unit are arranged on the volute; the magnetic field detection module is used for detecting the magnetic field of the magnetic element in the rotation process of the impeller and used for forming corresponding pulse signals according to the detected magnetic field signals; and the range hood main control unit is used for detecting whether the impeller has eccentric abnormity or not according to amplitude change of the pulse signals, and used for detecting whether the air flue has load abnormity or not according to frequency change of the pulse signals. By adopting the scheme of the embodiment, the magnetic element is mounted on the impeller, the magnetic field detection module is arranged on the volute, impeller eccentric abnormity and air flue load abnormity can be rapidly and effectively detected, and real-time monitoring on impelleroperation properties and air flow properties can be achieved.

Detector data representing the intensity of light emitted from a light source and impinging on a detector after passing a certain path length through the gas may be analyzed using a first analysis method to obtain a first estimate of the analyte concentration in the volume of gas. calculating, and analyzing the detector data using a second analysis method to obtain a second calculation of the analyte concentration. The second calculation may be promoted to an analyte concentration when it is determined that the analyte concentration is outside the first target range of the first analytical method.

The invention belongs to the technical field of strain measurement, and relates to a flexible film microwave strain sensor which comprises a substrate, a sensor main body, a positive pole and a negative pole, wherein the substrate comprises a plastic layer and an SU8 material layer for bonding a polyethylene terephthalate (PET) plastic layer and the sensor main body; the sensor main body is a monocrystalline silicon film; the film is composed of a P-type doped region, an undoped region and an N-type doped region; the undoped region is positioned between the P-type doped region and the N-type doped region to form a PIN junction; the P-type monocrystalline silicon region is connected with the positive pole; the N-type monocrystalline silicon region is connected with the negative pole; and during measurement, the flexible film microwave strain sensor is fixed on an object to be measured. The flexible film microwave strain sensor can be used for measuring high-frequency dynamic strain, and the accuracy is greatly enhanced.

The invention discloses a miniature electrochemical sensor reference electrode potential measuring and calculating device which comprises a closed shell, a reference electrode, a temperature sensor, aconductivity sensor, a measuring circuit and a working electrode. The reference electrode, the temperature sensor and the conductivity sensor are arranged in the closed shell; and the reference electrode, the temperature sensor, the conductivity sensor and the working electrode are electrically connected with the measuring circuit through connecting wires. The invention belongs to the technical field of sensors, and aims to solve the problems of low stability of reference potential, potential drift, limited service life and difficulty in direct measurement of reference electrode potential during measurement of an electrochemical sensor in the prior art. The device has the technical effects that the device solves the problem that the reference electrode of the miniature electrochemical sensor is difficult to directly measure the electrode potential, and further solves the problems that the measurement precision of the sensor is reduced and the service life of the sensor is limited dueto degradation and drifting of the reference electrode.

The invention discloses a system and method for control of a biaxial transposition mechanism and a method for self-calibration of a strapdown inertial group. The control system includes an angular position sensor, an analog-to-digital converter, a DSP microprocessor, an FPGA processor, a motor driver circuit and a motor which are connected in sequence. The control method includes the steps of collecting and analyzing an angular position signal, generating a digital control quantity after a closed-loop control based on an analysis result, and driving the motor to rotate through output of the digital control quantity. The self-calibration method utilizes the above control system or control method for calibration. The control system, the control method and the self-calibration method can realize high-precision acquisition of angular position data of the biaxial transposition mechanism and high-precision closed-loop control of the biaxial transposition mechanism, effectively realize the high-precision control of a speed loop and the position loop of the biaxial transposition mechanism, and further achieve self-calibration function of the strapdown inertial group.

The invention discloses a grounding resistance monitoring instrument with self-checking and correction, which comprises a main circuit and a switching circuit connected with the main circuit, and the switching circuit is respectively connected to an external grounding network and a standard resistance. Add a high-precision standard resistance to the circuit board to simulate the ground network, and transfer the circuit that originally tested the external ground network to the standard resistance on the test board through the relay switching circuit. Fine-tuning is implemented inside the program, and the offset is added to the measured value to reach the normal value; if there is a large deviation between the measured value and the standard value, it means that there is a big problem with the equipment and needs to be returned to the factory for repair. Among them, the switching circuit structure is as follows: four double-pole double-throw relay switches are used. After adopting the present invention, technicians can remotely know the working status of the equipment, and can realize remote correction when the measurement data deviates.

The invention discloses a self-calibration double-signal biosensor and application thereof in miRNA detection, and belongs to the technical field of biosensors. Fluorescent group modified DNA is fixedon a full covalent bond graphene field effect transistor to serve as a sensitive probe for detecting miRNA. The stability of multiple subsequent processing of the device in a solution phase is realized by utilizing the characteristic of covalent bond connection between layer transfer structures; through a full covalent bond graphene field effect transistor and a fluorescence technology, simultaneous detection of double signals of miRNA is realized so as to realize a self-calibration function. Compared with the existing miRNA detection technology at present, the self-calibration biosensor fordetecting miRNA can meet the detection requirements of stability, reliability, high sensitivity, high selectivity, rapidness, simplicity and convenience, and a new thought is provided for miRNA detection.

The invention discloses a standardized collection and sensing method of a clinical expiration sample in non-invasive lung cancer screening. The method comprises the following steps of constructing a sensing chip, and constructing a self-calibration multi-parameter sensing device for quickly identifying lung cancer; sampling the expiration; sensing and recognizing an expiration sample; connecting agas bag with the sensor to enable the gas and a photosensitive material above the sensing chip to generate the cross response and enable the color and the RGB value of the photosensitive material tobe changed; and collecting a difference spectrum image and a 30-dimensional RGB value before and after the reaction of a calibration sensing chip and a measurement sensing chip for the further analysis and judgment. The standardized collection and sensing method of the clinical expiration sample in non-invasive lung cancer screening solves the field calibration problem in the rapid lung cancer recognition by using a dual-channel structure, realizes a self-calibration function, eliminates the background interference and effectively improves the detection speed and accuracy.

The invention discloses a self-calibration balance free of manual calibration. The self-calibration balance comprises a base, a weighing pan, a weighing sensor, an electromagnet, a positioning column and a weight, wherein the weighing sensor comprises a weighing part used for generating deformation and a mounting part used for mounting and fixing, the weighing pan is fixedly connected with the weighing part of the weighing sensor, and the mounting part of the weighing sensor is fixedly connected with the base; the electromagnet mounting part is mounted at the bottom of the bearing part; the electromagnet is fixedly mounted on the electromagnet mounting part; the positioning columns are fixedly installed on the base and distributed at the two ends of the electromagnet. the weight is mounted between the base and the electromagnet; Based on the invention, through the calibration function of the main controller, the electromagnet can be controlled to be opened or closed so as to generate or lose magnetism. Meanwhile, under the guiding action of the positioning column, the weights can be automatically loaded and unloaded, so that the self-calibration function of the balance is realized.

The invention relates to the field of laser wavelength monitoring, and discloses a multichannel laser wavelength dependence monitor and a monitoring method. The multichannel laser wavelength dependence monitor is composed of a multi-optical-fiber collimator, an F-P etalon with adjustable cavity length and a photoelectric detector, and monitors and measures frequency differences between laser light sources in a scanning manner. Through the multiplexing of the F-P etalon by means of a multi-optical-fiber head and the tenability of the etalon, the multichannel laser wavelength dependence monitor realizes frequency difference monitoring and feedback of multiple laser devices, is simple in structure, can be used for monitoring multi-channel laser without modulating a DFB laser device, reduces channel interference, and plays a significant role in improving a signal-to-noise ratio of the system.

The invention provides a gas mass flow controller. A detection and calibration module is used for receiving input to-be-controlled gas, conveying the input to-be-controlled gas to a flow adjusting module and detecting the actual flow value of the flowing to-be-controlled gas; the flow adjusting module is used for outputting the to-be-controlled gas and can detect and adjust the flow output value of the to-be-controlled gas; a control module is used for controlling the detection and calibration module and the flow regulation module to respectively detect a flow actual value and a flow output value in a detection and calibration mode, and controlling the flow regulation module to regulate the flow of the output to-be-controlled gas according to the flow actual value and the flow output value, so that the flow is consistent with the flow actual value; and in the real-time detection mode, the flow adjusting module is controlled to detect the flow output value in real time, and the flow adjusting module is controlled to adjust the flow of the output to-be-controlled gas according to the flow output value and the flow output value, so that the flow is consistent with the flow set value. The gas mass flow controller provided by the invention has a self-calibration function, so that the gas mass flow controller can be suitable for various different gas environments.

The invention relates to an orthogonal mismatch calibration method and device of a direct frequency conversion transmitter. The orthogonal mismatch calibration device comprises a first voltage comparator, a second voltage comparator, a first switching circuit, a second switching circuit, a digital state machine, a low-pass filter, a gain fine-tuning circuit and a phase fine-tuning circuit. The output end of a passive frequency mixer is connected with the input end of the low-pass filter, and the output end of the low-pass filter is connected with a first input end of the second voltage comparator. The gain error and the phase error between same-phase / orthogonal channels of the direct frequency conversion transmitter are measured with the orthogonal mismatch calibration method and device; the optimal calibration value is obtained through successive approximation, the self-calibration capacity of orthogonal mismatch of the direct frequency conversion transmitter can be improved, and dependency, complexity and power consumption of a calibration system are lowered.

The invention belongs to the fields of image processing and computer vision, and relates to a method for calculating dynamic external parameters of an infrared stereo camera based on histogram equalization. Since the imaging of infrared cameras is different from that of visible light cameras, there are fewer points that meet the requirements obtained by directly extracting feature points for matching. In order to solve this problem, the present invention extracts and matches the respective feature points of the left and right infrared cameras, and corrects the original calibration results based on these feature points. In addition, in order to solve the problem of insufficient feature points, we not only extract feature points from the original image, but also extract feature points from the infrared image after grayscale histogram equalization. The invention solves the problem of changes in the positional relationship of an infrared binocular camera caused by temperature, humidity, vibration and other factors. It has the advantages of fast speed, accurate results and simple operation.