45results about How to "No temperature drift" patented technology

The invention provides an intelligent parking monitoring and management system and a vehicle in-position detection method under a parking mode. The system comprises a vehicle detector, a wireless communication unit and a parking monitoring and management center, wherein the vehicle detector comprises an infrared detection module and a GMI detection module; the vehicle detector is used for carrying out comprehensive processing on a vehicle existence signal, which is detected by the infrared detection module, of a parking space and a vehicle disturbance geomagnetic field magnetic anomaly signal, which is detected by the GMI detection module, of the parking space, generating vehicle information of the parking space, and sending the vehicle information of the parking space to the wireless communication unit; and the parking monitoring and management center is used for processing the received vehicle information of the parking space, and carrying out monitoring, management and charge management on the parking space information according to a processing result. The intelligent parking monitoring and management system and the vehicle in-position detection method under the parking mode are applicable to the technical field of vehicle detection.

The invention provides an intelligent pressure guide wire based on flexible MEMS sensors and a manufacturing method of the sensors. The body of the pressure guide wire is of a solid structure, the guide wire is made to rotate in the circumference by controlling the head of the guide wire, and the guide wire can move forward in a blood vessel of a human body in cooperation with the axial feeding of the guide wire; the pressure sensors which are distributed on multiple points are arranged at the tail of the pressure guide wire and connected with internal leads, the sensors reach the head of the guide wire along the guide wire, a sensor lead electrode point is arranged on the head of the guide wire and connected with a controlling handle, and blood flow pressure signals measured by the pressure sensors are collected in real time. The pressure sensors are fully flexible and wrap the surface of the guide wire in a wind-around mode; the head of the guide wire is designed to be flat so that the head of the guide wire can be connected with an external torque sensor on the controlling handle and the feedback torque generated when the guide wire rotates can be measured in real time. The guide wire solves the problem of limitation existing in the manufacturing and measurement process of an existing pressure guide wire.

The invention discloses an integrating method of a hybrid integrated circuit with controllable working temperature. The method comprises the steps of integrating a common hybrid integrated circuit on the right side of a frontal base aluminium nitride ceramics substrate, integrating a semiconductor freezer on the back of the frontal base aluminium nitride ceramics substrate, respectively leading out connecting lines from two ends of a N type semiconductor and a P type semiconductor, bonding, and connecting the whole circuit. A thermal resistor, which is clinging to a temperature-sensitive semiconductor core, is provided in the device for detecting the inner working temperature of device. An exterior controllable switch circuit and the current direction are controlled by tracking the change of the resistor to check the change of the voltage at two ends of the resistor and to control temperature by controlling the frequency of increasing or decreasing temperature. The integrated circuit of the invention is widely applied to the fields such as space flight, aviation, ship, precise instrument, geological exploration, oil exploration, communication, industrial control, etc. The invention has an expansive market prospect.

The invention discloses an integrating method of a working temperature controllable multi-chip component. Integrating technology of a thermal signal-acquiring thick film thermistor, micro thermoelectric refrigeration, thick film screen printing, thick film laser resistor trimming, and co-sintering ceramic at low temperature in multiple layers, is adopted by the method, wherein a multi-layer co-sintered ceramic substrate is formed by sintering multiple layers of ceramic, and each layer comprises a metalized through hole, a conduction band and a stop band; the thick film thermistor is buried in the second layer of a ceramic plate of the multi-layer co-sintered ceramic substrate, and the burying position faces an integrated circuit chip which is sensitive to temperature; the conduction band, the stop band, the integrated circuit chip, a small-capacity inducer and a micro element are integrated on the front surface of the substrate; and a semiconductor cooler is integrated on the back surface of the substrate and is respectively connected to a surface bonding area through the through hole from the two ends of an N type semiconductor and a P type semiconductor. By the component, devices work in a specific working temperature range for a long time, the temperature stability for long-term work of the devices can be ensured, and the long-term reliability of the devices is improved.

The present invention relates to an ultra-wide field small distortion vehicle lens optical system. The optical system comprises a first lens L1 having negative power, a second lend L2 having negative power, a third lens L3 having negative power, a fourth lens having positive power, a fifth lens L5 having positive power and an infrared cutoff filter L6 which are arranged from an object to be shot to an image plane in order, and the object to be shot can realize clear imaging at the image plane through integrally moving the lens at different distances. The first lens, the fourth lens and the fifth lens are glass aspherical lenses, and others are glass lenses. The optical system is big in the angle of visual field and small in distortion and size, has no TV distortion, and has no temperature drift defocusing phenomenon in the temperature range from 20-85 DEG c.

The invention discloses a testing system and method for phase consistency among frequency variable T / R assembly channels and belongs to the technical field of testing. According to the system and the method, reference channels and calibration channels work in a passive state, do not consume power, do not generate heat, do not generate temperature drift and are high in testing accuracy; according to the reference channels and the calibration channels established by introducing double-balanced mixers and lowpass filters, so full-double two-port calibration is possible and the testing accuracy is improved; power supply, state control and transmitting signal regulating devices do not need to be arranged for the reference channels, so system components are simplified, and system construction costs are reduced; the working bands of the double-balanced mixers are relatively wide; frequency unchangeable and one-time frequency variable reference channels and calibration channels are established through switching of switches, so certain university is achieved; and the lowpass filters are introduced into the input and output ports of the reference channels and the calibration channels, so unnecessary spectrum components are filtered, and the accuracy of a testing result is improved.

The invention discloses an open channel section water flow online measuring device and a measurement and control method. The device comprises a measuring supporting frame, a measuring rod assembly is fixedly installed on the measuring supporting frame, a side rod assembly communicates with a signal processing control host 11, the measuring rod assembly comprises a measuring rod 8 and a measuring rod driving mechanism, and a set of sensors are arranged on the side rod 8. The measuring rod driving mechanism comprises a measuring rod lifting motor 10, an output shaft of the measuring rod lifting motor 10 is fixedly connected with a coded disc 4 and a shaft angle encoder 5, and the coded disc 4 is fixedly connected with the measuring rod 8. The technical problem to be solved by the invention is to provide the open channel section water flow online measurement device and the measurement and control method so as to solve the problems that the existing open channel flow measurement equipment realizes multi-vertical-line multi-measurement-point water flow real-time online measurement according to relevant national standards, and the measurement is inaccurate under the conditions of turbid water body, silted channel, sundries in the water body and the like. The problem of real-time online flow measurement of the open channel can be effectively solved.

The invention discloses an electric detection means, specifically a thermometry cable. The thermometry cable includes temperature sensor chip at least, protecting node which is out of the sensor chip and directing line which is connected with the sensor chip, the specific characteristics are: said top end of the directing line is T type injection part, the two sides of the T type injection part are two-core waterproof sealing connector, a circuit board which is connected with the left and right two-core connectors and the directing line is mounted in the inner of the T type injection part; the sensor chip is a digital temperature sensor chip which integrates the temperature sensor and signal pickup circuit, analog-to-digital conversion circuit. The invention has high accuracy, strong interference immunity, corrosion prevention, flexibility, tension; it can be widely used in various signals sensing system of temperature monitoring and detecting system, such as warehousing, agriculture, fisheries industry, mining industry.

The invention discloses a medium-low-speed maglev train gap detection method based on image processing, and the method comprises the steps of respectively using a high-speed industrial camera to collect suspension gap images by two gap sensing units, and transmitting the collected images to respective image processing units for the processing of the suspension gap images; respectively calculatingthe actual suspension gap value of the current suspension point and the actual suspension gap value of the suspension point of the adjacent suspension frame by respective gap calculation units I, andrespectively sending the actual suspension gap values to gap calculation units II of the suspension point on the side and the suspension point of the adjacent suspension frame; and calculating the final suspension gap value and sending a fault alarm signal by the gap calculation unit II when the difference between the two suspension gap values is too large. The medium-low-speed maglev train gap detection method has the advantages of strong anti-interference capability, low equipment cost, simple installation process, high linearity and no temperature drift; and meanwhile, the detection precision and the fault tolerance are higher.

The present invention provides an electric field measurement system based on FPGA control and an application method thereof, belongs to the technical field of electrical devices, and especially relates to an electric field measurement system. Aiming at current defects, the present invention provides an electric field measurement system and an application method thereof with large measurement and application ranges of a power frequency electric field, high measurement accuracy, good safety and stable operation and suitable for a high humidity and a high temperature. In the method, an FPGA controller receives signals to switch on an electric field sensor and a temperature and humidity sensor, the temperature and humidity sensor returns temperature and humidity information to the FPGA controller, the FPGA controller processes received signals, performs flash latch of the corrected data and transmits the data to the upper computer for display, the upper computer sends the data to a handheld terminal, and when the data exceeds a set value, an alarm module starts. The electric field measurement system based on the FPGA control and the application method thereof are mainly applied to electric field measurement of a suspension field intensity indicator.

The invention provides an impeller-type flowmeter flow high-speed sampling sensor to solve the problem that conventional sampling sensors are short in detecting distance, poor in diamagnetism and inaccurate in measuring. The impeller-type flowmeter flow high-speed sampling sensor mainly comprises a high-speed sampling probe and a sensor controller, a coil, a coil support and a protecting support are arranged in the high-speed sampling probe, and the sensor controller comprises a power-source power supply device, a radio wave generating device, a raid wave receiving device, a sampling recognition device, an edge steep pulse generating device, a sampling signal converting device and a sensor signal outputting device. The impeller-type flowmeter flow high-speed sampling sensor is suitable for various impeller-type flowmeters to realize high-speed measuring, and has the advantages of micro power consumption, wide voltage, good temperature characteristic and voltage resistance, excellent output signal and the like; in addition, the impeller-type flowmeter flow high-speed sampling sensor is free of any resistance on an impeller, long in detecting distance, good in resistance to ferromagnetism and accurate in measuring, and different shells can be chosen for different purposes.

The invention discloses a water flow on-line testing device which comprises a fixing plate, four corners of the fixing plate are respectively provided with mounting holes, and the water flow on-line testing device is characterized in that one side of the fixing plate is fixedly connected with one end of a cross rod of an L-shaped fixing rod, and the other end of the L-shaped fixing rod is fixedly connected with the middle of the cross rod; the two ends of the cross rod are fixedly connected with one ends of the straight groove rods respectively, the other ends of the straight groove rods are fixedly connected with the two ends of the vertical rod of the inverted-U-shaped support respectively, the inverted-U-shaped support is connected with the ditch depth testing module, and the two straight groove rods are connected with the water flow velocity testing module respectively. The invention relates to the technical field of open channel flow measurement, in particular to a water flow online measuring device. The device can conveniently measure the water flow velocity.

A high voltage power supply device for a diesel engine particle cleaner and an output control method of the high voltage power supply device are used for burning particles by the fact that the particles in a diesel engine automobile particle cleaner are sparked, and the high voltage power supply device enables battery voltage to convert to high voltage through inversion. The high voltage power supply device for the diesel engine particle cleaner comprises a storage battery assembly, a direct current voltage stabilizing circuit, a signal operational circuit, a signal modulator circuit, a power amplificatory circuit, a boosting transformer, a high voltage output rectifying circuit, a high voltage signal sampling circuit and a current sampling circuit. The high voltage power supply device for the diesel engine particle cleaner is characterized in that the high voltage power supply device further comprises a single chip microcomputer, wherein feet of input or output (I / O) port of the single chip microcomputer are respectively the input end of the signal modulator circuit and the output end of the current sampling circuit. Feet which are connected with the input end of the signal modulator circuit can output square waves with mutually inverse phase positions. In the time process of the particles accumulating, the single chip microcomputer can discontinuously output the square waves to enable the inversion to happen discontinuously, when the accumulation of the particles achieves the regeneration point, the single chip microcomputer continuously output the square waves to enable the particles to be sparkled and burned, so that the fact that the high voltage power supply device absorbs electric energy from a storage battery is largely reduced.

The invention relates to a high-temperature and high-pressure small-size length measuring device belonging to the technical field of displacement sensor measurement and comprising a sensor, a dial gauge, a dial gauge support, an outer sleeve, a movable sleeve, a device body, high-temperature magnets and a measuring rod, wherein the measuring rod is arranged in a central hole of the device body, and the upper end of the measuring rod is provided with one high-temperature magnet; and the outer sleeve of the device body is provided with the movable sleeve, the other high-temperature magnet is arranged on the inner wall of the movable sleeve, the top of the outer sleeve is provided with the sensor, and the middle of the outer sleeve is provided with the dial gauge. The device adopts a pair ofhigh-temperature magnets for connection and interaction by magnetic force, the measuring rod is arranged in the high pressure-resistant device body, when the measuring rod is moved up and down, the high-temperature magnet on the measuring rod and the high-temperature magnet on the movable sleeve are synchronously moved up and down, and because the high-temperature magnets have no demagnetization at high temperature, the activity and the reliability of the device at high temperature and high pressure are ensured. The device solves the problem that an electronic element of the sensor generates great temperature fluctuation at high temperature and high pressure to result in inaccurate measuring precision.

The invention discloses a single-heat-source micromechanical Z-axis thin-film gyroscope which comprises a sensitive layer and a cover plate, wherein two pairs of heaters and four pairs of thermistors,of a cross-shaped structure, are arranged on the upper surface of the sensitive layer, and a rectangular groove is etched in the lower surface of the sensitive layer; the electrifying mode of the twopairs of heaters is periodic square wave type electrifying; a groove is etched on the cover plate and is hermetically connected with the upper surface of the sensitive layer. The Z-axis thin-film gyroscope has the advantages of no solid sensitive mass block, vibration resistance, impact resistance and the like of the micro heat-flow gyroscope. The process adopted by the invention is compatible with an integrated circuit process, so that the driving circuit and the extraction circuit can be easily manufactured on the same chip, and the potential of high integration level is achieved. As the sensitive mass does not contain a solid mass block, compared with micro inertial sensors adopting other working principles, the micro inertial sensor has the advantages of large impact resistance, simple structure, extremely low cost and high reliability.

The invention provides a method for measuring the direct current magnetic bias current of a neutral point multi-point grounding power transformer, which comprises the following steps of: 1, cutting sampling flat steel with the same length from each grounding flat steel as a sampling resistor, and applying a current source to two ends of one of the sampling flat steel; 2, connecting voltmeters to two ends of the cut length of each sampling flat steel, and sampling voltage signals of the sampling flat steel; and 3, enabling the current source to apply currents of different magnitudes twice, enabling each piece of sampling flat steel to respectively extract voltage signals under the working condition of the currents twice, obtaining the actual resistance value of the sampling resistor through conversion under the condition of considering the inherent grounding current of the neutral point through the known current and voltage signals, and then measuring a direct-current magnetic bias current signal flowing through each piece of flat steel. The method can accurately measure the direct-current magnetic bias current of the neutral point of the power transformer when multiple grounding flat steel is grounded, is suitable for field detection and on-line monitoring, and has the advantages of being free of temperature drift and capable of being calibrated on line compared with a traditional Hall sensor.

The invention discloses a current sensor based on an alloy resistor and an implementing method thereof. The current sensor comprises the alloy resistor, a voltage measuring unit, a power supply unit, a controller and a communication unit, wherein the alloy resistor is serially connected with a to-be-measured circuit, the voltage measuring unit is used for measuring the voltage at the two ends of the alloy resistor and sending the voltage value to the controller, the controller is used for calculating the current value of the measured circuit and outputting according to the resistance value of the alloy resistor, the power supply unit is used for supplying power for the voltage measuring unit, the controller and the communication unit, and the communication unit is used for the remote outputting of the controller. When the controller sends measured data to a far end or a background, the measured data is transmitted through the communication unit. Compared with an existing current transformer, the current sensor has the advantages that the temperature drift is avoided, the mechanical vibration-resistant performance is realized, the frequency characteristic is good, the alternating current and the direct current are universal, the size is small, the assembly is realized, and the like.

The invention belongs to the technical field of ship safety monitoring, and particularly relates to a ship structure state long-term monitoring system. The ship body total longitudinal stress testing unit measures the deformation amount of the ship body structure in real time; the ship body vibration test unit monitors the ship bow acceleration and tests ship body vibration data; testing the overall rolling and pitching angle data of the ship body through a ship body motion testing unit; monitoring stress-strain information of a dangerous position of the ship body in real time through a ship body local stress testing unit; the total longitudinal bending moment, the transverse bending moment, the double torque and the size and direction of the torque acting on the cross section of each needed shipping space of the ship body structure are obtained through calculation of the main control center and compared with preset threshold values, and if the ship body is in a dangerous stress state, early warning is conducted through the alarm unit. The device has the advantages of being simple in structure, convenient to install, accurate in measurement, free of temperature drift and the like, and is suitable for monitoring structural deformation and stress states of the container ship in the loading, unloading and shipping processes for a long time.

The invention discloses a current transformer device for high-precision current-voltage conversion. The current transformer device comprises a core, a primary winding and a secondary winding and is characterized in that the primary winding is of a multi-tap structure and at least comprises a first tap and a second tap, a primary current corresponding to the first tap is 1A, a primary current corresponding to the second tap is 5A, a secondary current corresponding to the output of the secondary winding is 50mA, a resistor R1 and a resistor R2 which are connected in series are arranged between the secondary winding and are identical, and a part between the R1 and the R2 is grounded. According to the device, a high current of 5A or 1A is converted into a 1.25V voltage signal, which facilitates digital signal processing, separately through a 0.005-level current transformer and the two resistors which have the characteristics of 0.005 high-precision and 1ppM ultralow temperature coefficient, so that compared with the traditional resistance sample current-voltage converter, the device has the advantages that a temperature drift phenomenon cannot occur, and the final conversion precision can reach a 0.01 level.

The invention discloses a full-bridge double push-pull flow z-axis film gyroscope and a processing method thereof, the z-axis film gyroscope comprises a sensitive layer and a cover plate, the upper surface of the sensitive layer is provided with two pairs of heaters, two pairs of thermistors and an isolation resistor; the electrifying mode of the heater is periodic push-pull electrifying; and a groove is etched on the cover plate and is hermetically connected with the upper surface of the sensitive layer. According to the invention, full-bridge and double-push-pull type heat flow is adopted, four bridge arms participate in work, the sensitivity is four times that of a single arm, the sensitivity is the highest one, and the power consumption is low; and the extraction circuit is an equal-armed bridge, the relation nonlinearity between the bridge arm resistance change of the equal-armed bridge and the bridge output unbalanced voltage is minimum, and the linearity of the gyroscope is good.

The invention discloses a single-heat-source T-shaped micromechanical biaxial thin-film gyroscope which comprises a sensitive layer and a cover plate, an isolation resistor, three heaters and two pairs of thermistors which are of a T-shaped structure are arranged on the upper surface of the sensitive layer, and a T-shaped groove is etched in the lower surface of the sensitive layer; the electrifying mode of the three heaters is periodic square wave type electrifying; and a groove is etched on the cover plate and is hermetically connected with the upper surface of the sensitive layer. The single-heat-source T-shaped micromechanical biaxial thin-film gyroscope inherits the advantages of no solid sensitive mass block, vibration resistance, impact resistance and the like of the micro heat-flowgyroscope. The process adopted by the invention is compatible with an integrated circuit process, so that the driving circuit and the extraction circuit can be easily manufactured on the same chip, and the potential of high integration level is achieved. As the sensitive mass does not contain a solid mass block, compared with micro inertial sensors adopting other working principles, the thin-filmgyroscope has the advantages of large impact resistance, the simple structure, extremely low cost and high reliability.

An optical fiber temperature sensor used for an oil-immersed transformer winding is disclosed. The sensor is characterized in that the optical fiber temperature sensor is formed by two protection pipes, two fixed caps and a transmission fiber; a fiber bragg grating is arranged in the transmission fiber; the two protection pipes are connected to the two fixed caps respectively, and the two protection pipes are in a hollow state; a center through hole is arranged in one fixed cap and a groove is arranged in another fixed cap; the transmission fiber is penetrated from a center through hole of the protection pipe, then enters into another protection pipe through the center through hole of the fixed cap and enters into the fixed cap through the protection pipe and the groove connected to another fixed cap; components are formed through one of mechanical connection, bonding agent connection and welding connection or combination of the above connection modes. The sensor has advantages that packaging is simple; installation and interchange are convenient; there is no error; temperature drift is not generated during long-term operation; and recalibration is not needed.

The invention discloses a channel water flow online measuring device comprising a rectangular frame and characterized in that the channel water flow online measuring device comprises the rectangular frame, the upper side of the rectangular frame is fixedly connected with the lower side of a sliding groove plate, and the sliding groove plate is provided with first sliding grooves, second sliding grooves, third sliding grooves, fourth sliding grooves and fifth sliding grooves which are symmetrical; and the two first sliding grooves, the two second sliding grooves, the two third sliding grooves, the two fourth sliding grooves and the two fifth sliding grooves are symmetrical about the transverse center line of the sliding groove plate, and sliding columns are arranged in the two first sliding grooves, the two second sliding grooves, the two third sliding grooves, the two fourth sliding grooves and the two fifth sliding grooves correspondingly. The invention relates to the field of water flow measuring equipment, and in particular, relates to the channel water flow online measuring device. According to the device, through simultaneous measurement of multiple measuring rods, real-time online measurement of multiple vertical lines and multiple sections of a river channel is achieved, measurement data are more comprehensive, the flow measurement precision is higher, and the data are more accurate.

The present invention discloses a high-temperature optical fiber probe convenient for cooling protection. The probe comprises an optical fiber collimator, a cooling protection shell and an infrared radiation energy processing system, a first fixed flange is installed inside the top of the cooling protection shell, and the optical fiber collimator is installed inside the first fixed flange. The optical fiber collimator is installed in the cooling protective shell through a first fixing flange. According to the invention, the optical fiber collimator can be well cooled and protected by using airflow, so that the optical fiber collimator can continuously work in a high-temperature industrial environment; the TE refrigeration patch is used for cooling and protecting the focusing imaging lens group and the detector, so that the detector can work in a room-temperature environment, and after the detector passes through the energy filtering assembly, a detector circuit board can obtain accurate data without temperature drift, continuous and reliable data are provided for a combustion optimization control system, the optimal optimization control effect is guaranteed, and the flue temperature of the coke oven is stable, and energy conservation, consumption reduction and emission reduction are realized.

The invention discloses a T-shaped push-pull flow micromechanical biaxial thin-film gyroscope which comprises a sensitive layer and a cover plate, three pairs of heaters and two pairs of thermistors which are of a T-shaped structure are arranged on the upper surface of the sensitive layer, and a T-shaped groove is etched in the lower surface of the sensitive layer; the electrifying mode of the three pairs of heaters is periodic push-pull electrifying; and a groove is etched on the cover plate and is hermetically connected with the upper surface of the sensitive layer. The T-shaped push-pull flow micromechanical biaxial thin-film gyroscope inherits the advantages of no solid sensitive mass block, vibration resistance, impact resistance and the like of the micro heat-flow gyroscope. The process adopted by the invention is compatible with an integrated circuit process, so that the driving circuit and the extraction circuit can be easily manufactured on the same chip, and the potential ofhigh integration level is achieved. As the sensitive mass does not contain a solid mass block, compared with micro inertial sensors by adopting other working principles, the T-shaped push-pull flow micromechanical biaxial thin-film gyroscope has the advantages of the large impact resistance, the simple structure, the extremely low cost and high reliability.