624results about How to "Low installation requirements" patented technology

The invention discloses a wireless positioning method and system. The wireless positioning system comprises at least one synchronous base station, a plurality of positioning base stations and at leastone positioning label and further comprises network communication equipment and a computing server. the synchronous base stations can also be used as positioning base stations at the same time, and the synchronous base stations and the positioning base stations further comprise high-precision clocks. The method comprises the following steps: a synchronization base station sends a synchronizationsignal at an interval of a period of time; the positioning base station receives the synchronization signal and uploads the data to the computing server; the computing server performs time synchronization on every two positioning base stations; whe positioning tag broadcasts a positioning signal once every other period of time; the positioning base station receives the positioning signal and uploads the data to the computing server; and the computing server computes the coordinates of the positioning tag.

The invention provides a train rail detection system and method and relates to the technical field of rail detection. An embedded computer device in the system sends sampling pulse signals to an inertia component and a laser photographing component; the laser photographing component shoots steel rail profile images and sends the steel rail profile images to the embedded computer device; the inertia component measures attitude parameters of a detection beam relative to steel rails and sends the attitude parameters to the embedded computer device; the embedded computer device determines transverse displacement data and vertical displacement data of the detection beam relative to the steel rails according to the steel rail profile images; calculation is conducted according to the transverse displacement data, vertical displacement data and the attitude parameters, and unsmooth geometric parameters of the train rails are determined; overrunning judgment is conducted according to the unsmooth geometric parameters, overrunning judgment data are obtained, and waveform data of the unsmooth geometric parameters are generated; and the overrunning judgment data and the waveform data are sentto a ground data processing center device.

The invention discloses a non-polar two-line system communication circuit which aims to solve the technical problem of preventing the occurrence of errors in the process of connection. The invention adopts the following technical scheme: a non-polar two-line system communication circuit comprises a host terminal and a slave terminal, wherein the host terminal is connected with the slave terminal and controls the slave terminal, the inside of the host terminal is provided with a host-terminal sending and receiving line module, the inside of the slave terminal is provided with a slave-terminal sending and receiving line module, and the host-terminal sending and receiving line module is connected with the slave-terminal sending and receiving line module in a non-polar two-line system connection mode. Compared with the prior art, an indoor unit controller for air conditioners supplies power for a temperature control device for air conditioners and carries out communication with the temperature control device by a power line, and the connection mode is a non-polar connection mode; and two lines can simultaneously carry out power supply and communication, thereby solving the problem that two lines simultaneously supply power and transmit signals, and reducing the demands on leads and installation.

The invention discloses a full-automatic biochemical analysis method. The method comprises the following steps: (1) preparing; (2) sampling, sample adding and stirring: an XYZ triaxial movement system is driven by a controlling circuit module to drive a reagent-sample adding and stirring system to transfer samples from a sample cabin to a reaction cup in a reaction disc and transfer reagents from a reagent cabin to the reaction cup in the reaction disc; when the reagents and samples are transferred, liquid in the reaction cup is stirred through the reagent-sample adding and stirring system; the specific liquid volume of sampling and sample adding is controlled by a plunger pump; (3) biochemical reaction and detecting; (4) cleaning. According to the invention, procedures such as sampling, sample adding, stirring, analyzing and detecting, and cleaning are integrated, so that the degree of automation is high, the operation is convenient, the relevant equipment cost is low, the detecting efficiency is high, and the popularization and implementation are easy.

A rendezvous and docking microwave radar angle measuring performance system error calibration system and a method are disclosed. The calibration system comprises an attitude position adjustment system, a microwave radar measurement system, an external conformance calibration system, and a measurement data acquisition system. The calibration method comprises the following steps: (1) building and preheating a laser tracker; (2) installing a microwave radar antenna and calibrating geometric parameters; (3) acquiring grid-style test data in the full field of microwave radar; and (4) calculating and binding radar angle measuring performance system error. The angle measuring performance system error in the full field of microwave radar can be calibrated, and angle measuring performance calibration under a target large-angle working condition is no longer limited by site factors and the ability of external conformance equipment. After initial geometric parameter calibration, full-automatic calibration work can be carried out. The calibration process is simple and reliable.

The invention relates to a method for calibrating the geometrical parameter error of an industrial robot based on a two-step method. A calibration coordinate system is established and comprises a measuring coordinate system and a constraint coordinate system, an error model is established according to the interconversion relationship between a robot connecting rod coordinate system and the calibration coordinate system, and thus the preliminary calibration result of a conversion matrix between the robot connecting rod coordinate system and the calibration coordinate system is obtained; and then the preliminary calibration result is utilized to establish an error correction model including the robot connecting rod geometrical parameter error and the conversion matrix error between the robotconnecting rod coordinate system and the calibration coordinate system according to a differential perturbation method, the corrected robot geometrical parameter error is obtained, and the calibration method is simple and precise.

The invention discloses a hoisting land power catwalk of a cylinder and belongs to the technical field of oil drilling equipment. The hoisting land power catwalk comprises a ramp, a pedestal, a rotating arm and a V-shaped drilling tool support beam, the upper end of the ramp is provided with a ramp guide pulley which is positioned at the connection part of the ramp and the drilling platform; the bottom of the V-shaped drilling tool support beam is provided with a support beam guide rail combined with the ramp guide pulley, and the support beam guide rail can be moved with respect to the ramp guide pulley. The hoisting land power catwalk is characterized in that the support beam guide rail at the V-shaped drilling tool support beam bottom is combined with the ramp guide pulley on the upper end of the ramp to directly convey the drilling rod near the well mouth, thereby improving drill-feeding working efficiency, in particular, the structure has the more obvious drill-feeding effect in the high drilling platform.

The invention provides an error compensation method for rotary shafts of a double-rotary-table five-shaft linkage machine tool. The error compensation method comprises the following steps that the tool length and the current coordinate system are set; a measurement center base at the workbench end is installed, and an installation error is measured and calculated; a rotary shaft error model containing an installation error and machine tool assembly relation is established; 12 error values generated when the two rotary shafts rotate are calculated through the error model; compensation and decoupling of the errors of the rotary shafts and the linear shafts, and an error compensation value is corrected; and a numerical-control code is corrected according to the error compensation value, so that error compensation of the rotary shafts of the double-rotary-table five-shaft linkage machine tool is achieved. The error compensation method is high in universality, the precision of the error model is improved, and automatic and effect error detection of the five-shaft machine tool is achieved.

The invention discloses a single-electrical signal-stimulated rotation ultrasonic motor which comprises a mandrel, a group of piezoelectric ceramic sheets, a window-shaped staggered mode converter, a friction disk, a bearing, a spring and a nut, wherein the piezoelectric ceramic sheets, the window-shaped staggered mode converter, the friction disk, the bearing, the spring and the nut are sequentially sleeved on the mandrel, the piezoelectric ceramic sheets are connected with electrode sheets, the mandrel, the piezoelectric ceramic sheets, the electrode sheets and the window-shaped staggered mode converter form the stator part of the ultrasonic motor, the friction disk and the bearing form the rotor part of the ultrasonic motor, and the spring and the nut form a positive-pressure pretightening force adjusting mechanism of the rotor and the stator parts of the ultrasonic motor. In the invention, a single-electrical signal-stimulated working mode is adopted, the elliptical orbit motion of stator end surface particles is realized by utilizing the longitudinal vibration mode of the group of piezoelectric ceramic sheets, a rotor is driven to rotate, and the ultrasonic motor has simple control-driven system, easy manufacture, easy miniaturization and integration, low cost, small control difficulty and broad application prospect.

The invention provides a method for improving accelerometer calibration accuracy. The method comprises the steps that a servo table on a linear acceleration simulation rotary table is positioned at the zero position, the output accelerated speed of the linear acceleration simulation rotary table is made to have a plurality of preset acceleration values, and the output value of an accelerometer fixed to the servo table is obtained; the servo table on the linear acceleration simulation rotary table is positioned at 180 degrees, the output accelerated speed of the linear acceleration simulation rotary table is made to have a plurality of preset acceleration values, and the output value of the accelerometer fixed to the servo table is obtained; according to the formula, the error of the installation positions of the accelerometer on the linear acceleration simulation rotary table is obtained. The invention further provides a device for improving accelerometer calibration accuracy. Working radius error influences of the accelerometer can be eliminated, and calibration accuracy can be improved.

The invention discloses an accelerometer performance parameter detection method and an accelerometer performance parameter detection system. The method includes: when a follow-up table on a linear acceleration simulation rotary table is located at a zero position, enabling output acceleration of the linear acceleration simulation rotary table to be multiple preset acceleration values, and obtaining output values of an accelerometer fixed on the follow-up table; after the follow-up table on the linear acceleration simulation rotary table rotates by 180 degrees relative to the zero position, enabling output acceleration of the linear acceleration simulation rotary table to be multiple preset acceleration values, and obtaining output values of the accelerometer fixed on the follow-up table; obtaining mounting position errors and corresponding performance parameters of the accelerometer on the linear acceleration simulation rotary table according to formulas, so that the performance parameters of the calibrated accelerometer can be corrected. By the method and the system, working radius error influences of the accelerometer can be eliminated, calibration precision is improved, and mounting requirements on the accelerometer during calibration are lowered.

The invention relates to a soda water preparation device. The soda water preparation device comprises a stirred vessel and a control circuit, wherein a water inlet connected with a water inlet pipe and an air inlet connected with an air inlet pipe are arranged at the upper part of the stirred vessel, a water outlet connected with a water outlet pipe is arranged at the lower part of the stirred vessel, paddle wheels driven by a motor are arranged in the stirred vessel, a water inlet controller is arranged on the water inlet pipe, a water outlet electromagnetic valve is arranged on the water outlet pipe, an air inlet electromagnetic valve and a three-way safety valve are arranged on the air inlet pipe, and a pressure switch is arranged on the three-way safety valve; an exhaust gas discharging port is arranged at the upper part of the stirred vessel, and a floating ball device is arranged in the stirred vessel; and the input end of the control circuit is connected with the pressure switch, the output end of the control circuit is connected with the water inlet controller, the air inlet electromagnetic valve, the motor and the water outlet electromagnetic valve. The invention also relates to a water dispenser with the soda water preparation device, and the water dispenser has the function of preparation of soda water, comprehensively promotes the functions of the existing water dispenser, and more conforms to the living demands of modern people.

A seat (5) includes a sensor (21) mounted on the seat which is arranged to sense the presence of an object, or movement or position of an object in a non-contact manner, within a sensing region around the seat. A processor is arranged to receive an audio signal and to process the audio signal based on presence, movement or position detected by the first sensor. A processed signal is delivered to a vibro-acoustic transducer mounted within the seat. The processor can also control a lighting effect based on presence, movement or position detected by the first sensor. A user can interact with audio in a personal way, to suit the mood of the user. A seated user can move their body (especially arms or hands) to modify audio, such as music. The seat has a nodule (12) which, in use, fits between the legs of a seated user. The nodule can house the sensor (21) and user controls.

The invention discloses a solid insulating bus connector which comprises a T-shaped insulating sleeve, an insulating rubber sheath, a conducting rod and a plug, wherein an electrified conductor is embedded in the T-shaped insulating sleeve. By arranging a through hole on one end of the electrified conductor in the T-shaped insulating sleeve, arranging a spring contact finger in the through hole of the electrified conductor and using the flexibility of the insulating rubber sheath, cabinet bodies can be firstly spliced, and then, buses can be connected. The dimensional accuracy and installation requirements for gas switch cabinets are reduced, installation deviation occurring in cabinet splicing can be effectively and adaptively compensated and adjusted, cabinet splicing is simple, buses are connected conveniently and reliably, and the insulating performance is good.

The invention discloses an optical rainfall detecting method, a detecting device and a light guide device. The optical rainfall detecting method includes transmitting parallel light onto the light guide device, repeatedly totally reflecting the parallel light in comprehensive fields of the light guide device and then ejecting the parallel light to certain positions according to preset directions; enabling light energy amplitude and frequency detectors to receive light signals via light receiving elements, detecting fluctuation frequencies and fluctuation amplitude of the light signals and transmitting detection signals to a central processing unit; enabling the central processing unit to acquire rainfall speeds and rainfall amounts according to the received detection signals. The parallel light is emitted by program-controlled light sources positioned inside the detecting device. The light receiving elements are located at the certain positions. The optical rainfall detecting method, the detecting device and the light guide device have the advantages that parts of the light can be refracted and scattered to air when raindrops drop on the surfaces of the light guide device, the light can leak when transmitted in the light guide device, light energy received by the light receiving elements can be reduced, the amplitude of reduction of the light energy can be directly affected by contact areas of the raindrops and the light guide device, accordingly, the sizes of the raindrops can be indirectly computed by the aid of reduction amplitude values, and the quantities of the raindrops can be computed according to frequencies of amplitude change of the light energy.

The invention belongs to the indoor environment detecting field, in particular relating to a detecting system used for detecting chemical contamination of materials of indoor articles. The detecting system comprises a lab and a closed detecting cabin arranged in the lab, wherein the detecting cabin comprises a detecting cabin door, a stirring fan arranged at the inner top of the detecting cabin, an exhaust outlet arranged on the upper wall of the detecting cabin, and an air supply outlet arranged on the lower part of the side wall of the detecting cabin; a computer, a concentration sampler, a pressure sampler, a temperature and humidity sampler and a flow sampler are arranged in the lab, the computer is connected with the concentration sampler, the pressure sampler, the temperature and humidity sampler and the flow sampler; three pipelines are arranged at the airspace in the lab, wherein the first pipeline is provided with a first set of air handling equipment, the second pipeline is provided with a second set of air handling equipment, and the third pipeline is provided with an exhaust fan. The detecting system used for detecting chemical contamination of materials of indoor articles uses the air handling equipment to control the environment of the detecting cabin, in order to ensure temperature, humidity, background concentration, particulate matter concentration, mixedness and air output to reach standard, improve detecting quality for chemical contamination of the materials of the indoor articles and reduce the cost.

The invention discloses a multifunctional driving monitoring early warning system based on a mobile terminal. According to the multifunctional driving monitoring early warning system, data are collected through four wide-angle cameras arranged on a front grating, a left side door mirror, a right side door mirror and a tail door of a vehicle respectively; then, the data are synthesized to form a complete image through the image processing technology; meanwhile, after electronic power-assisted steering data in an ECU of a vehicle and related working condition information of other vehicles are collected through an OBD2 port data collector which is connected to the ECU of the vehicle and comprises a main chip, namely, an eml327 chip, a 2.4 G module and other related circuits, the data are transmitted to a controller through the 2.4 G wireless technology; advancing trajectory prediction of the vehicle is calculated according to other data, including the axle base, the wheel tread and the like, of the vehicle; finally, the image where trajectory prediction is conducted is outputted to the mobile terminal device such as a mobile phone in a wireless mode, and the data are displayed through the mobile terminal device. According to the multifunctional driving monitoring early warning system, real-time image transmission and detection are achieved through a wireless communication method at a low cost.

The invention provides a measuring device for the three-dimensional displacement of a GIS busbar chamber relative to the ground, which comprises an image processing unit and a marker, and is characterized in that the image processing unit is fixed on a busbar chamber, and the marker is fixed right below the image processing unit; the image processing unit comprises a camera, a storage unit, a calculation unit and a communication unit, the camera is used for imaging the marker and outputting an image of the marker to the storage unit to store; the calculation unit is used for acquiring three-dimensional displacement information of the busbar chamber according to central position variations of the marker in the imaged image and variations in the distance between two features points on the marker; and the communication unit is used for transmitting the three-dimensional displacement information, which is calculated by the calculation unit, of the busbar chamber to a monitoring center. The invention further provides a measuring method for the three-dimensional displacement of the GIS busbar chamber relative to the ground. The measuring device provided by the invention can measure the three-dimensional displacement of the GIS busbar chamber relative to the ground accurately, is simple in mechanical structure, low in installation requirement, low in cost and easy to be deployed in great quantities, and can be widely applied to the field of electric power monitoring.

The invention belongs to the technical field of smoke detection and particularly relates to an online monitoring system of ultralow-concentration smoke and an analysis method thereof. The online monitoring system of ultralow-concentration smoke disclosed herein comprises a smoke sampling system, a gas pretreatment system, a dried compressed air generating system, a gas component analysis system, a temperature-pressure flow measuring system. The invention also discloses the analysis method relating to the online monitoring system of ultralow-concentration smoke. The online monitoring system of ultralow-concentration smoke and the analysis method have the advantages that the gas sampling system provides thermal treatment, dissolution loss of measured gas due to high-humidity environment in a flue is prevented effectively, flow speed measuring is stable and reliable, the flow speed can reflect working conditions better, the sample gas pretreatment system is researched and designed independently, the special material selected can remove moisture in smoke within a short time, gas component loss is avoided, operation configuration software has a friendly interface, data are visually displayed, and operation is simple and feasible for a user.

The invention discloses a rectangular workpiece position and angle measurement method, and the method comprises the steps: 1), enabling a two-dimensional shape measurement sensor to make plane movement in an X-axis or Y-axis direction in a cutting range along with a laser cutting head, enabling the light of a sensor to vertically irradiate an edge part of a steel plate in a downward manner, enabling the light to form an inclined angle theta with the X-axis direction, and obtaining the contour of the edge of the steel plate; 2), obtaining the left and right edge position values of a rectangular piece material through the first measurement; 3), carrying out the translational scanning measurement of the long side of the rectangular piece material, carrying out the sampling of the position of the long edge of the rectangular piece material, and recording the coordinate position of a machine tool; 4), employing a long edge data ample and a two-point straight line method or a least square method for the fitting of a straight line, and calculating the deflection angle of the long side of the rectangular piece material and the X-axis; 5), comparing a left and right edge value and a theoretical left and right edge value, and deducing the X-axis and Y-axis offsets of the rectangular piece material; 6), enabling the obtained deflection angle and the X-axis and Y-axis offsets to be transmitted to a numerical control system for the compensation of a workpiece coordinate system; 7), enabling the numerical control system to start to laser cutting through employing the workpiece coordinate system after compensation.

The invention discloses a cusp form revolution object tool calibration method for an industrial robot on the basis of a crossed laser beam. A crossed laser correlation device is connected with a robotmovement control system through calibration software, the calibration software obtains the tail end posture of a robot flange plate and plans a circular arc trajectory, and the trajectory is conveyedto the robot movement control system; in a process that a robot executes the circular arc trajectory, the calibration software monitors a signal of a laser beam and obtains the posture of the robot when the signal changes; the calibration software carries out on-line planning on a linear movement trajectory generated by movement along the axial line of a tool to be calibrated under different gestures, and then, the linear movement trajectory is conveyed to a robot movement controller to be executed; and when the signal suddenly changes, the posture of the tail end of the robot flange plate isobtained, and the position of the cusp of the tool is obtained through data under different postures. By use of the method, the automated calibration of a tool coordinate system is realized, and therefore, the problems of being complex in operation, high in cost, difficult in practical application and the like in tool calibration are solved.

The invention provides a monocular vision based measurement method for terrain clearance of an unmanned aerial vehicle. A series of ground scene images are acquired by a monocular electric focusing camera vision sensor, a definition evaluation function is proposed by utilizing the characteristic of high proportion of high-frequency energy of clear images, the images are evaluated on the basis of the proposed definition evaluation function, terrain clearance of the unmanned aerial vehicle is completed according to evaluation results, and height information is provided for landing, ascending ordescending of various small flying platforms such as unmanned aerial vehicles and the like. High-frequency energy is obtained with a gradient calculation method, image definition evaluation is realized by evaluating the amount of the high-frequency energy of the images; compared with direct calculation of a frequency domain, the method has a small calculation amount and meets the requirement of real-time performance of the system; compared with a gradient function, the evaluation results are described by frequency domain information, and noise resistance is better.

The invention provides a collision early warning method and system based on vehicle-road cooperation and an intelligent terminal, and the method comprises the steps: collecting the original sensor data of a moving target in a set space region, and carrying out the matching of the motion information of the moving target; identifying the type of the moving target based on the original sensor data and the matched moving information of the moving target, and dynamically tracking the moving target; according to the dynamic tracking result, predicting the occurrence probability, the occurrence region and the collision moment of the collision accident in a future preset time period; and if judging that the occurrence probability of the collision accident is higher than a preset value, outputting the occurrence area and collision moment of the collision accident in the form of alarm information. Vehicle-mounted and roadside communication equipment of the Internet of Vehicles is utilized, the equipment installation requirements for vulnerable traffic participants are reduced, and the accuracy of early warning is improved through the directional sound wave transmission technology.

The invention belongs to the technical field of structural design, and particularly relates to a pipeline connecting clamp hoop, which has the technical scheme that the inflating type pipeline connecting clamp hoop comprises a plug (1), a clamp hoop (2), a screw bolt (3) and an air bag (4), wherein the clamp hoop (2) is connected by the screw bolt (3), the air bag (4) is plated in the clamp hoop (2) after being inflated, and the plug (1) is arranged in a threaded hole of the clamp hoop (2). The inflating type pipeline connecting clamp hoop can be used for completely pasting the outer surfaces of the two ends of a pipeline, so the sealing is ensured, the pressure of the clamp hoop on the pipeline can be changed according to the inflating pressure of the air bag, in addition, the vibration resistance capability is realized, the impact force from each direction can be absorbed, and meanwhile, the contraction and expansion resistance capability is realized. Compared with the welding connecting mode, a flange connecting mode and an ordinary clamp hoop connecting mode, the inflating type pipeline connecting clamp hoop has the advantage that the stability of a pipeline system is improved.

Characters of the invention are: embedded type processor / controller of supporting ZigBee is adopted; through interface of SPI bus, radio comm. module of supporting ZigBee is connected to microcontroller; through ZigBee and gateway of isomeric network, the radio comm. module is connected to data monitor center; receiving polling, querying commands from the data monitor center, microcontroller issues commands of turning on / off power to switch relay, and transfers collected data to the data monitor center for collection and arrangement. The invention is capable of constructing network in high redundant nodes including 65000 metering devices for electric energy so as to guarantee that network possess powerful capability of data acquisition, and error self recovery capability. Thus, in condition, in which individual nodes do not work, the network can run normally. Advantages are: avoiding boring configuration procedure, reducing cost for maintaining network, manpower and time.

The invention discloses a novel full-automatic biochemical analyzer, comprising a pedestal (15), a reagent-sample introducing and stirring system (4), a control circuit module, a sample storage device, a reagent storage device, a rotary reaction disc (13), a stepping motor used for driving the reaction disc to rotate, a cleaning system (11), a plunger pump (12), a photoelectric detection system (9) and an XYZ triaxial moving system used for driving the reagent-sample introducing and stirring system to rotate, wherein the control circuit module, the sample storage device, the reagent storage device, the rotary reaction disc (13), the stepping motor, the cleaning system (11), the plunger pump (12), the photoelectric detection system (9) and the XYZ triaxial moving system are arranged on the pedestal, and the reagent-sample introducing and stirring system (4) has an integrated introducing and stirring function and is arranged on a Z-direction sliding assembly. The novel full-automatic biochemical analyzer provided by the invention integrates procedures consisting of sampling, sample introduction, stirring, analysis and detection, cleaning, etc., realizes full process automation and has the advantages of a high degree of automation, convenient operation, low cost, high testing efficiency and easy popularization and application.

The invention relates to a star search method, which comprises three coarse adjustment star search proposals, a fine adjustment star search proposal and a tracking mode. The star search method has the advantages of low cost, low mounting requirement, convenient debugging, capacity of acquiring the orientation and a pitch angle value of an antenna in real time, no interference by external factors such as weather or geomagnetism and the like, and quick, accurate and stable star search.

The invention belongs to the technical field of non-circular gears and discloses a design method for a curved-tooth non-circular gear. The tooth profile of the curved-tooth non-circular gear is designed through a generating gear. The tooth profile equation is solved according to the curved surface of a counterpart rack, the kinematic relation of gear generation and the engagement principle. Compared with a straight gear, the curved-tooth non-circular gear designed through the method is high in contact ratio and bearing capacity. Compared with a bevel gear, the curved-tooth non-circular gear designed through the method does not generate axial force in the transmission process and has low requirements on bearings and installation. Through the arc tooth profile of the curved-tooth non-circular gear, lubricating oil is contained in the tooth surface, and therefore a quite good lubricating condition is achieved.

The invention discloses a camera fast-calibration method for a highway lane departure warning system. The method includes the following steps that a road image based on effective information of a lane line is acquired; coordinates of calibration points are acquired; a camera calibration model is established. According to the method, the road image containing the effective information of the lane line is acquired by calculating the effective view field of a camera; on the basis, the four calibration points with spatial actual positions and image positions known are selected. According to the method, every time calibration is performed, only the length of the four sides and the length of the diagonals of a quadrangle formed by the four calibration points, and the coordinate values of the intersection point of the diagonals of the quadrangle need to be measured, and in other words, the coordinate positions of the calibration points can be uniquely determined through the geometric position relation. According to the method, not only is a large amount of time consumed by a traditional method shortened, but also factors causing measurement errors are reduced, the calibration process is simple, the calibration is easy to operate, a user does not need to carry a special calibration device, and the method is suitable for the lane departure warning application background.

The present invention discloses a pressure sensor based on RFID technology and a vehicle anti-theft detection technique. An instantaneous pressure change in the car is detected by the pressure sensor. When the pressure changes, an identity serial number of a driver marked in a mark card can be read by an anti-theft detection device through a RFID reader. The decision of whether driving an alarming device to alarm is made after judging the legality of the serial number of the driver. At the same time, the identity serial number of the driver is read by RFID at a fixed interval (such as 10 seconds); the driver is judged as having left the car if the legal identity serial number of the driver for a continuous fixed times (such as 3 times), and then the defending state is shifted from 'off' to 'on'. Destructive operations, such as cutting an electrical connection line from the original car are not necessary. The present invention has the advantages of simple and convenient in installation; and reliable in anti-theft detection. The present invention is characterized in easy to use and prevail thus is suitable for any car model.