6642results about How to "The overall structure is simple and reliable" patented technology

A magnetically navigable catheter includes a sheath having a proximal end and a distal end, and an extension member having a proximal end and a distal end, slidably mounted in the sheath so that the distal end portion of the extension member telescopes from the distal end of the sheath. The distal end portion of the extension member being relatively more flexible than the distal end of the sheath. There may be one or more electrodes on the distal end of the extension member. There is also at least one magnet, and preferably more than one magnet, on the distal end portion of the extension member to allow the distal end of extension member to be oriented by the application of an externally applied magnetic field. The catheter preferably also includes a sleeve, having a proximal end and a distal end, the sleeve being slidably mounted in the sheath so that the distal end portion of the sleeve telescopes from the distal end of the sheath, so that the sleeve can be selectively extended and retracted relative to the sheath, and the extension member can be selectively extended and retracted relative to the sleeve. According to the method of this invention, the distal end of the electrode catheter is introduced into the part of the body where the electrode will be used to contact the specific body structures, and the electrode is moved into contact with the body structure by applying an external magnetic field and selectively telescoping the extension member relative to the sheath to bring the electrode on the distal end of the extension member into contact with the specific body structure.

The invention belongs to the field of underwater robots, and specifically relates to an underwater robot recovery system and a recovery method thereof. The system includes a mother ship, an underwater robot, an automatic line throwing device and a lifting seat arranged on the underwater robot, a butting lifting device and a draw gear. After the underwater robot completes the mission, a haulage rope is thrown out from the ship bow. The staff on the mother ship picks up the haulage rope through a rope picking device, and then the rope is traversed through the draw gear. The underwater robot is driven by the mother ship for navigation to overcome the effects of waves in the sea. A guidance rope is thrown by a remote control command. The butting lifting device is driven by a hoist installed on the mother ship, and falls down along the guidance rope to abut with the underwater robot and clamp. The whole recycling process is realized. The underwater robot recovery system of the present invention has the characteristics of compact structure, convenient operation, safety and reliability, small influence by the sea state, no transform to the hoist, and small requirement to the mother ship, and can achieve the laying and recovering by the same system for the underwater robot under four grade sea conditions.

The invention relates to a solar cell array and antenna deployment test device for spacecraft such as a satellite and the like, and provides a zero-gravity suspension type deployment test device which overcomes the shortcomings of the air-floating deployment test device in the prior art and solves the problem existing in simulation of the zero-gravity state of the environment orbit of the solar cell array and antenna of the satellite in the ground gravity environment. The zero-gravity suspension type deployment test device is characterized by comprising a support system [1], a guide rail system [2] and a hanging system [3]. The support system [1] comprises four upright frames and a horizontal frame. The guide rail system [2] comprises two longitudinal guide rails, multiple transverse guide rails and a guide rail hanger. The guide rail system [2] is mounted below the horizontal frame. The hanging system [3] comprises a rolling bearing frame, a tubular dynamometer and a connecting piece. Through the invention, the problems existing in simulation of the zero-gravity state of the environment orbit of the solar cell array and antenna of the satellite in the ground gravity environment and the like are solved, and beneficial effects of simple structure, convenience in use, strong adaptability and the like are obtained.

The invention discloses a pot cover assembly and a pressure cooker and belongs to the technical field of pressure cookers. The pot cover assembly and the pressure cooker are designed to solve the problem that the structure of an existing device is complex. The pot cover assembly comprises a pressure-limiting valve and a valve body unbalance mechanism. The valve body unbalance mechanism can eject the pressure-limiting valve continuously after triggered and enable the pressure-limiting valve to be in an exhaust status continuously until the valve body unbalance mechanism is reset, and the electric pressure cooker is restored to a high pressure mode. The pot cover assembly and the valve body unbalance mechanism of the pressure cooker can eject the pressure-limiting valve continuously after the valve body unbalance mechanism is triggered and enable the pressure-limiting valve to be in the exhaust status continuously until the valve body unbalance mechanism is reset. The electric pressure cooker is restored to the high pressure mode only when the pot cover of the electric pressure cooker is opened or rotated. A non-pressure cooking mode is achieved by using the pressure-limiting valve to exhaust continuously. Manual exhaust can also be achieved; the structure is simple and reliable; using is convenient; assembling is easy; the assembling efficiency is high; and the cost is low.

The invention discloses a device and a method for testing the precision retaining ability of a ball screw assembly. A head frame of the device is fixedly arranged at one end of a bed body; an output shaft of an alternating-current motor is connected with an output shaft of a speed reducer through a synchronous belt transmission mechanism; the other end of a tested ball screw is arranged in a mounting hole in a tail frame and can rotate; a fixing plate is fixedly connected with a second group of slide blocks; the second group of slide blocks has two slide blocks; the two slide blocks are respectively locked on two guide rails; the two guide rails are fixedly arranged on the bed body and are parallel to the axis of the tested ball screw; a nut penetrates through the tested ball screw and is fixedly connected with a nut base; the nut base is fixedly arranged on a slide plate; the slide plate is fixedly connected with a first group of slide blocks; and the nut and the slide plate drive the first group of slide blocks to move on the guide rails under the driving of the rotation of the tested ball screw. The device can test and detect the precision retaining ability of the ball screw assembly, is convenient to operate and is reliable in a detection result.

The invention discloses an electromagnetically-driven spherical robot. The electromagnetically-driven spherical robot is characterized in that the spherical robot comprises a spherical case, and magnets uniformly and annularly arranged at the vertical middle positions on the inner wall of the spherical case, wherein adjacent magnets have opposite pole directions; a main shaft is transversely arranged in the spherical case in a rotary manner, and is fixedly connected with a bracket; at least one group of electromagnetic coils are disposed on the bracket; and each electromagnetic coil group includes two pairs of electromagnetic coils arranged symmetrically relative to the main shaft. The magnetic core of the electromagnetic coils can be controlled to attract and repel the magnets on the inner wall of the spherical case by controlling the polarity of the two electromagnetic coils to change alternately, so that the bracket can be driven to rotate around the main shaft; therefore, the spherical robot can move forwards and backwards based on the electromagnetic stepping principle. Compared with the conventional spherical robot, the electromagnetically-driven spherical robot has the advantages of simple and reliable structure, stable and flexible movement, and high controllability. Meanwhile, the driving manner of the spherical robot is simplified greatly in comparison with the existing spherical robot, thereby improving the utilization rate of the inner space of the spherical robot. Spherical robots with different dimensions can be manufactured according to different purposes, thereby enhancing the bearing capacity of the spherical robot, and facilitating the generation of serial products.

The invention discloses a starting power generation system for an electric automobile, which comprises a double salient pole starting power generator, a starting power generation controller and controller working power; the starting power generation controller comprises a bidirectional power conversion circuit, an exciting current detection unit, an output current detection unit, an output voltage detection unit, a position rotation speed detection unit, an armature current detection unit, an exciting main circuit and a digital signal processor, wherein the exciting main circuit includes an exciting relay, a rectification filter unit and a chopper circuit which are connected in series in turn; and the digital signal processor is connected with the exciting current detection unit, the output current detection unit, the output voltage detection unit, the armature current detection unit, the position rotation speed detection unit, and the control ends of the bidirectional power conversion circuit, the exciting relay and the rectification filter unit by signals respectively. The invention also discloses an electric automobile and a control method thereof. Compared with the prior art, the starting power generation system is simple in structure, low in cost and flexible to control.

The invention discloses a 3D printing device suitable for multi-material workpieces. The 3D printing device comprises three-dimensional moving structures, a workbench, a rotary plate type sprayer switching device, a feeding system and a control system. The three-dimensional moving structures comprise the X-axis moving structure, the Y-axis moving structure and the Z-axis moving structure. The workbench is fixedly connected with the X-axis moving structure and is driven by the X-axis moving structure and the Y-axis moving structure to perform horizontal motion and driven by the Z-axis moving structure to perform vertical motion. The rotary plate type sprayer switching device comprises a rotary plate and a motor; multiple segmented screw rod sprayer devices are mounted on the rotary plate in the circumferential direction, and the rotary plate is driven by the motor to rotate for switching. The feeding system is used for providing pulp for the segmented screw rod sprayer devices. The control system is used for controlling the movement of the three-dimensional moving structures and the rotary plate and extrusion of the pulp in the segmented screw rod sprayer devices. According to the 3D printing device, the selecting range of processing materials is expanded, and the 3D printing device has the advantages of being high in work efficiency, low in production cost and the like, and can effectively reduce material hysteresis and flowing phenomena.

The invention discloses a monitoring method for sedimentation of soft soil foundation and the device. Procedures are that firstly, working reference pile is buried; secondly displacement sensor is installed; thirdly cable is connected; fourthly sedimentation steel plate is set; fifthly displacement is monitored and data are read; sixthly data is processed. Cement sand pile is connected with lower-layer PVC pipe and pre-buried steel plate is embedded at the top of pile. Four clip springs are welt on the pre-buried steel plate. The foundation of displacement sensor is fixed on the pre-buried steel plate tightly by clip springs. The foundation is connected with pull rod. The pull rod mated with spring is connected ball head. The ball head is connected with sedimentation steel plate. Shell, foundation, pull rod, spring and ball head are covered by bellows. The sedimentation steel plate is connected with upper-layer PVC pipe and the foundation of sensor is connected with the cable. After the cable passes through the hole and it is connected with digital display instrument through the cable protective pipe. The invention can not be constrained by construction and weather conditions and can realize quick, accurate, continuous and easy measurement for sedimentation value of soft soil foundation. The measuring accuracy is high and foundation sedimentation after opening for traffic can be monitored for a long time.

A device for detecting comprehensive performance of a ball screw assembly in a loaded state comprises a testboard machine body fixed on a cast iron platform, wherein a servomotor is arranged at one end of the testboard machine body; the output shaft of the servomotor is connected to one end of the ball screw assembly through a first coupler, a dynamic torque sensor and a second coupler; an eddy current sensor and a rotary encoder are arranged at the other end of the testboard machine body; a grating scale and an infrared temperature sensor are arranged on the testboard machine body; a rolling guide rail is arranged on the testboard machine body, and is provided with an analog working table; the analog working table is connected to the rolling guide rail through a rolling guide rail slide block, and is connected to a loading device; a ball screw assembly nut is arranged on the analog working table through a nut support base. The device is stable in properties, quick in movement and testing response speed, comprehensive and accurate in testing performance parameters, and simple in structure, and can realize the comprehensive performance detection of ball screw assemblies with different models in no-loaded states or loaded states.

The invention discloses a charging pressing forming method for a variable-cross-section special-shaped pipe, and relates to a forming manufacturing method of a metal pipe. The problems that an existing low-internal-pressure forming technology only can form a pipe with the unchangeable section perimeter, and meanwhile, in the internal-high-pressure forming process of an advanced high-strength steel variable-cross-section pipe, the pressure is high, springback is large, and a mold is seriously worn are solved. The forming method comprises the steps that firstly, an upper expansion mold and a lower expansion mold are assembled on a pressure machine; secondly, the upper expansion mold descends to perform mold assembly, a pipe blank is subject to charging, and the pipe blank expands until the pipe blank is attached to the mold; thirdly, the internal pressure of the pipe blank is relieved; fourthly, an upper pressing block and a lower pressing mold are assembled on a pressure machine; fifthly, the upper pressing block descends to perform mold assembly; sixthly, under the joint action of mechanical pressure of the mold and hydraulic pressure of an inner cavity of a variable-cross-section round pipe, mold attaching is carried out, the variable-cross-section round pipe is formed into the variable-cross-section special-shaped pipe, and the forming process is finished; and seventhly, the internal pressure of the variable-cross-section special-shaped pipe is relieved, and the variable-cross-section special-shaped pipe is cut, so that the variable-cross-section special-shaped pipe meeting the design requirement is obtained. The method is used for forming the variable-cross-section special-shaped pipe.

The vehicle classification method includes: the time-domain radar signal of single-frequency continuous wave radar is used as input to conduct time-frequency analysis to obtain a radar echo Doppler frequency spectrum chart changing along time; by Hafford counterchange the Doppler chart is mapped into a scattered central position parameter image; through characteristic picking-up, Karhunen-Loeve(K-L) screening and compressing, a characteristic sample is obtained, which is classified using Fisher rule to obtain the vehicle-type classification. For multi-type condition, multiple two-type classifiers are used to conduct respectively pairwise classification, according to the result of the classifiers said above the classification result is obtained by voting. Advantage: simple and reliable structure and low cost, conducting classification synchronously with detecting and speed-measuring of vehicles.

The present invention relates to a device with hinged USB connector, in which electric power or data is supplied via a computer to the USB connector, thereby providing power or data to the device. One or more ends of the device are connected to a USB connector in a hinged manner. At the foldable end of the device, there is a recess in the centre which forms a receiving slot, on each of the two sides of which, there is an insertion hole for insertion of a hinge shaft; the USB connector has an integrally formed protruding part, which corresponds to and is inserted into the receiving slot and has a through hole for insertion of the hinge shaft, which connects the USB connector and the device. The device can be a lighting device, UBS drive, MP3, blue-tooth device, anion generator, charger or mini digital camera.

The invention relates to launching and recycling technologies for underwater gliders or other underwater or water surface vehicles, in particular to an intelligent underwater robot shipborne launching and offshore recycling mechanism and corresponding method. The recycling mechanism comprises a shipborne body, a main recycling slide way, an auxiliary recycling slide way, an electric turning mechanism, an electric control cabinet, a tensioning mechanism, a multi-sensor fusion positioning system, a dragging unit and a hook system. The recycling mechanism is simple, reasonable, reliable in structure, and easy and convenient to operate, the underwater gliders, autonomous underwater vehicles (AUV), other underwater robots and the like can be launched and recycled quickly and efficiently, the workload of sailors and related staff on a ship are greatly relieved, the dangerous factors in the launching and recycling processes of the underwater robots are avoided, and the problem that the launching and recycling processes waste time and labor is solved.

The invention relates to a compliant passive gripper drawn by pneumatic ropes and provided with bent plate spring skeletons. The gripper is provided with two fingers which take bent plate springs as skeletons and grip objects passively through elastic restoring forces of the bent plate spring skeletons; the two fingers are driven by a cylinder; the acting force of the cylinder is increased through a five-hinge skewed double-elbow reinforcement mechanism which is frequently used on an injection machine so as to drive drawing ropes of the fingers, overcome deformation resistance of the bent plate springs and open the passive gripper; and the opening degree of the gripper can be controlled by controlling the pressure of the cylinder. The gripper has the advantages of large driving force, wide applicable range, simple structure, less controlled objects, convenience in maintenance and low requirements on using environment, has the characteristics of flexibility in degree of freedom and resiliency in acting force, has good flexibility in adaptivity, can grip objects with varying shapes and sizes, and belongs to the technical field of application of robots and mechatronics.

The invention discloses a transformer station guide rail type inspection robot. The transformer station guide rail type inspection robot is characterized by comprising a guide rail arranged in a transformer station and a mobile dolly walking on the guide rail. The mobile dolly is provided with a central control module, and a holder, a motor driving module, a positioning module, an equipment information acquisition module, a communication module, a remote control module and a fault module which are connected with the central control module, wherein the equipment information acquisition module is used for obtaining information of detected equipment; the communication module is used for receiving data and communicating with a host computer; the holder is provided with a camera for acquiring onsite image information in the transformer station; and the central control module is used for controlling the driving of the mobile dolly and the holder, data processing and communication. According to the invention, the transformer station guide rail type inspection robot has the following advantages: power is supplied uninterruptedly, the requirement for non-contact type state monitoring of various equipment of the transformer station is satisfied, electric power equipment is monitored in an omni-directional mode, the operation is stable and reliable, and the maintenance cost of the guide rail is low.

The invention discloses a multi-information display head-up display device for an automobile. The multi-information display head-up display device for the automobile comprises an image source screen for displaying information, an embedded controller for controlling the image source screen and a control button. The control button is installed below an instrument panel of the automobile. The multi-information display head-up display device for the automobile further comprises a reflector set, an image correcting lens and an antireflection film. The reflector set comprises a plane mirror and a non-plane mirror. The antireflection film is attached to a front windshield of the automobile. The image source screen is fixedly arranged below the plane mirror. The non-plane mirror is arranged on a reflective light path of the plane mirror. The image correcting lens is arranged right above the non-plane mirror. The embedded controller is fixedly installed right below the image source screen and is connected with the image source screen through a wiring harness. The multi-information display head-up display device for the automobile further comprises a photosensitive sensor and a loudspeaker. The multi-information display head-up display device for the automobile provided by the invention not only considers characteristics of visual ergonomics, but also displays various information.

The invention discloses a mixed format signal optical fiber transmission device. The mixed format signal optical fiber transmission device comprises a sending end, a fiber channel and a receiving end, wherein the sending end converts input camera link format video image signals and multi-channel universal serial signals into optical signals, the optical signals are sent to the receiving end through the fiber channel, and the receiving end receives the optical signals and restores the optical signals to original video image signals and multi-channel universal serial data signals. The mixed format signal optical fiber transmission device is suitable for optical fiber transmission of the camera link video image signals and the multi-channel universal serial signals in all configuration modes, the transmission of mixed format signals in a single-fiber channel at different rates can be achieved through multiplexing of a transmission bus, and consumption of extra fiber channels and devices is reduced. According to the mixed format signal optical fiber transmission device, electrical signal conversion processing and transmission control are achieved through a field programmable gate array (FPGA) device, the requirement for actual functions is met, meanwhile, the usage of application-specific integrated circuits is reduced, the advantage of high integration and universalization degrees can be achieved, and supports can be provided for further function extension and performance upgrading.

The invention provides an intelligent waste cellphone battery recycling device. The intelligent waste cellphone battery recycling device comprises a battery recycling box and a control system, a battery inlet is arranged on the right side of the middle of the front side of a box body, a coin outlet is arranged on the left side of the middle of the front side of the box body, a liquid crystal display is arranged on the upper side of the front side of the box body, a loudspeaker is arranged on the left side of the liquid crystal display, indicating lamps are arranged below the liquid crystal display, a battery collecting device is arranged on the lower side of the interior of the box body, a battery voltage detecting device is arranged between the battery inlet and the battery collecting device, and a coin output mechanism is arranged on the right side of the upper portion of the box body and connected with the coin outlet. By the battery collecting device, the coin output mechanism and a control system are integrated. Waste cellphone battery recycling is realized by means of incentive measures, the intelligent waste cellphone battery recycling device is simple in structure, high in practicability, intelligent and humanized, and a new idea for large-scale recycling of cellphone batteries is provided.

The invention relates to a transmission mechanism of an electric operating mechanism for a miniature circuit breaker, which includes a housing, a driving motor is installed in the housing, a handle that can rotate around a fixed shaft is installed on the housing, and a gear is installed at the lower end of the handle and is located in the housing. The output shaft of the drive motor is equipped with a turning wall and a matching driving gear, the driving gear meshes with the gear, and there is a gap between the turning wall and the supporting device of the driving gear; the scheme of the present invention provides a simple and reliable structure, Transmission mechanism of motor operating mechanism for lower cost miniature circuit breaker.

The invention relates to a stair climbing wheelchair, which comprises a wheelchair stair climbing device, a wheelchair and walking wheels, wherein the wheelchair stair climbing device comprises a power part, a gear chain power train, and a stair climbing structure, and the power part comprises a power source and a power source driving gear; the gear chain power train comprises a device framework, a main drive axle and a pair of driving gear chain mechanisms, and the device framework comprises a framework body and a pair of gear chain supports; the main drive axle comprises a main drive shaft and a power source driven gear, and the driving gear chain mechanism comprises I-class and II-class main drive gears and main drive rockers I and II; the stair climbing structure comprises a pair of stair climbing inner foot stands and outer foot stands, and the stair climbing inner foot stand comprises an inner foot stand linking rod, a telescopic inner foot stand front leg and a telescopic inner foot stand back leg; the stair climbing outer foot stand comprises an outer foot stand linking rod, a telescopic outer foot stand front leg and a telescopic outer foot stand back leg. A wheel chain train is used to drive the two sets of four-legs foot stands to make alternant forward rising and falling movement, and the stair climbing wheelchair is simple and reliable in structure, and is safe and convenient to use.

The inventive silicon based piezo-electricity socle girder miniature power supply device, pertains to the micro-energy sources field in the electronic technology Micro Electro-Me-chanical Systems field. A silicon based piezo-electricity socle girder miniature electric generating apparatus is provided with a silica fixing frame, an oxidizing layer, a platinum / titanium lower metallic layer, a piezo-electricity PZT layer, a platinum / titanium upper metallic layer, an electrode insulation protection layer, and a vibrating base; the structure of the silica fixing frame combines the monocrystal silicon wet method etching and dry-etching to process, whose structure is integrated as a whole, and the center part of the structure is in a socle girder shape, which includes a silicium socle girder and a free end mass block; the piezo-electricity power supply device uses a micro-machining technique to integrally machine, and can realize the integration of the power supply and the microelectronic devices. The service-life of the power supply is long, the structure is simple, and the power supply is environmental protective and energy-saving, which can realize the multi-point disposition of wireless sensing network, without incessant replacement of power supply.

The present invention discloses a pressure filter, which comprises multiple groups of filter plates, wherein the adjacent filter plates are arranged in a contact manner, and each filter plate is provided with a material channel and a pressure filtration space with a variable volume and for accommodating a material. One end of the material channel is communicated with the pressure filtration space, and the other end is communicated with the pressure filtration space of the adjacent filter plate. Each filter plate is further provided with an air channel for communicating the filter plate pressure filtration space and a liquid channel for communicating the pressure filtration space of the adjacent filter plate. Filter screens are arranged on both sides of the filter plates and are positioned inside the adjacent pressure filtration space, wherein a filter cloth is covered outside the filter screen. The pressure filter of the present invention has characteristics of fewer components, simple and reliable structure, and low equipment maintenance workload. The present invention provides a pressure filtration method. According to the pressure filtration method of the present invention, two-stage pressure filtration and one-stage drying are adopted, wherein the first stage is that a driving pump is adopted to feed the material to carry out pressure filtration, the second stage is that high pressure air pressurizes the filter cloth to carry out pressure pressing, and the third stage is that the material is dried with high temperature air, such that pressure filtration efficiency is improved, and effects of automatic material unloading and filter cloth cleaning are achieved through the high pressure air.

The invention discloses a hydraulic transmission-based method and a hydraulic transmission-based device for storing energy and realizing stabilized voltage and constant frequency in wave power generation. In the device, a floating pendulum is connected with a hydraulic cylinder, high pressure oil outputted by a non-rod cavity of the hydraulic cylinder enters a high pressure energy storing device and an oil inlet of a variable motor through a control integrated valve and through a high pressure oil tube, low pressure oil outputted by an oil outlet of the variable motor enters a low pressure big-capacity energy storing device and returns to the rod cavity of the hydraulic cylinder through the control integrated valve, the main shaft of the variable motor is connected with a permanent magnet synchronous generator, and the permanent magnet synchronous generator is connected to a rectifying module and a direct-current electric energy charging-discharging control module and then connected to a stepless unload adjustable load and a storage battery. The high pressure energy storing device and the low pressure big-capacity energy storing device realize the energy storage by absorbing the fluctuation, caused by the change of transient waves, of pressure and flow rate. A controller realizes the pressure stabilization constant frequency by the stepless unload adjustable load and the displacement of the hydraulic motor respectively. The device has the advantage of making the wave power generating device output more smoothly, more free from influence of the wave impact and have higher efficiency.

The invention relates to a planar spiral microphone array. The planar helix microphone array comprises an array camera, an array main body which are arranged at the center position and a plurality of microphones which are arranged on the array main body; the array main body is a plurality of planar spiral rigid spokes; the planar spiral microphone array is characterized in that: the microphones are distributed on cross nodes of n*n groined lines which are spaced uniformly in a plane, wherein n is an integral multiple of 15 or 21. The number of the planar spiral rigid spokes is 8, each rigid spoke is provided with 8 array elements, and the 64 array elements are distributed on the cross nodes of the 15*15 groined lines. The planar spiral microphone array has a simple and reliable structure,the number of support arms which are connected to each node is a few, influence on a sound field is less, and the detection precision is improved; the planar spiral microphone array adopts a fully rigid structure and is stable and reliable, so that an error which is caused by changes of an effective aperture because of flexible connection is avoided; and the planar spiral microphone array has theadvantages of multiple array element microphones, large information acquisition capacity, high positioning accuracy and wide positioning range.

The invention relates to a system and a method for positioning a linear rail car based on laser ranging. The system comprises a laser range finder, a controller programmable logic controller (PLC) and an alternating current contactor for controlling a motor, wherein the controller controls the rail car to start and stop by controlling the alternating current contactor; the laser range finder is arranged on the rail car; the emitted laser is parallel to an advancing rail; a laser reflection plate is supported by an upright post and fixed at one end of the rail; and the controller can accurately judge the current position of the rail car by receiving a digital position signal of the laser range finder, and can control starting and stopping of the motor according to the demanded position when the laser emitted by the laser range finder irradiates the reflection plate and is reflected to the laser range finder. By adopting the positioning method disclosed by the invention, the rail car can accurately achieve the target position, so as to achieve full-automatic positioning of the rail car.

The invention relates to a micro force load device of piezoelectric film suspension beam micro force sensor, belonging to sensor and test technical field, used for the static and quasi-static test and label of piezoelectric film suspension beam micro force sensor, wherein a micro force load device is composed of a one-dimension micro displacement table, a two-dimension micro displace table, a piezoelectric dual-crystal micro force generator, and a damping device. The one-dimension micro displacement table is composed of an X-axis micrometer element and a one-dimension micro displacement table base. The two-dimension micro displace table is composed of a Y-axis micrometer element, a Z-axis micrometer element, a two-dimension micro displacement table base, a support plate and a socket head cap screw. The piezoelectric dual-crystal micro force generator III is composed of a micro probe, a fixing block, two piezoelectric ceramic plates, an aluminum plate, a clamping plate and a socket head cap screw. The invention has simple and reliable structure, easy operation, and improved resolution of micro force loading system, to resolve the problems as instability and hard control of micro Newton force load.

The invention discloses a one-way isolated type metal-oxide-semiconductor filed-effect transistor (MOSFET) drive circuit. The one-way isolated type MOSFET drive circuit comprises a level transformation and pulse drive circuit, a pulse transformer, a magnetic reset circuit and an acceleration turn-off circuit. The level transformation and pulse drive circuit is used for level transformation and power amplification on input pulse signals so as to drive the pulse transformer to work. The magnetic reset circuit is used for enabling the pulse transformer to carry out reliable magnetic reset. The acceleration turn-off circuit is used for accelerating turn-on and turn-off of a MOSFET tube, and comprises a capacitor, a second resistor, a third resistor and a PNP type triode. One end of the capacitor is connected with an auxiliary edge synonym end of the pulse transformer, the other end of the capacitor is connected with the second resistor, and the other end of the second resistor is connected with a grid electrode of the MOSFET tube. The third resistor is connected with the capacitor in parallel, a collector electrode of the PNP type triode is connected with an auxiliary edge non-synonym end of the pulse transformer, a base electrode of the PNP type triode and the capacitor are connected with one end of the second resistor, and an emitting electrode of the PNP type triode is connected with the grid electrode of the MOSFET tube.