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 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 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 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 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.

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.