74results about How to "Not affected by electromagnetic interference" patented technology

The invention relates to a non-contact ground stress testing device and method based on drilling microscopy digital photography and belongs to ground stress measuring device and method of geotechnical engineering. The device comprises an electronic microscopy camera, a signal processing and control module, a signal transmission module, a gyroscope, a signal collecting module, a portable power source and a device shell. The method includes: fixing the testing device in a device mounting hole, using the electronic microscopy camera to collect the hole wall digital images of the hole during a whole stress relieving process, selecting the representative images before and after the stress relieving, acquiring sub-pixel images through image interpolation, optimizing sub-pixel image analyzing areas and points, setting analyzing traces, calculating to obtain strain values, and calculating the ground stress values and the azimuth angles thereof by the hole partial wall surface stress relieving method theory. The non-contact ground stress testing device and method has the advantages that simple operation and high adaptability are achieved, testing precision can reach one micro strain, strain measuring mark points and analyzing traces are optimized, influence of temperature, rock viscosity and electromagnetic interference is avoided, a probe can be reused, and low cost is achieved.

The invention provides a minimally-invasive-surgery-robot three-dimensional force sensor based on fiber gratings. The minimally-invasive-surgery-robot three-dimensional force sensor is mainly formed by four pairs of fiber bragg gratings, and the four pairs of fiber bragg gratings are fixed in a groove in the circumferential direction of the outer wall of a hollow-glass-fiber round bar; fibers transmit light signals to a signal processing module, and digital signals of stress are led out through the connecting end of a mechanical arm. A light path of the three-dimensional force sensor is that light emitted by a broadband light source enters sensing fiber gratings through a light frequency isolator and a fiber beam splitter in sequence, reflected light of the gratings is transmitted to a signal processing circuit through the fiber beam splitter and transmission of matching gratings in sequence, the light signals are processed to be transmitted to a control circuit, the central wavelengthof the sensing fiber gratings is reversely inferred by measuring driving signals of the circuit, and the digital signals of the stress are thus obtained. In addition, for the three-dimensional forceinformation coupling phenomenon, static decoupling of three-dimensional force information is achieved through the corresponding algorithm. The minimally-invasive-surgery-robot three-dimensional forcesensor based on the fiber gratings is simple in structure and high in accuracy, is not influenced by electromagnetic interference, and is easy to process and low in cost.

The invention belongs to the technical field of safety monitoring, in particular to a fiber photoelastic effect based larger-area sound monitoring system. The system comprises a remote demodulation terminal, full fiber sensing terminals in an area to be monitored and a transmission optical cable for connecting the demodulation terminal with the full fiber sensing terminals, wherein a large quantity of full fiber sensing terminals can be multiplexed on the transmission optical cable. In the invention, sensing fibers in the full fiber sensing terminals are used for extracting various sound signals in surrounding environment, and the transmission optical cable is utilized to acquire the information and returning the information to the demodulation terminal; and through corresponding analysis and processing, the information is really restored to realize the real-time monitoring of various sound signals in a large-range area to be monitored. The system mainly comprises passive fiber devices without comprising any electronic components, has no radiant electromagnetic waves, cannot be influenced by electromagnetic interference and is suitable for the fields of military affairs, public security, security, safety production, disaster prevention and control, and the like.

A method for actively controlling low mode vibration of space board-sail structure based on form-sending includes carrying out real time sense on vibration form of board-sail structure by optical fiber grating sensing network, generating control policy according to sensed vibration information of said structure, driving form memory alloy spring by using control driving unit to generate control action and utilizing form memory effect and super-elastic effect of said spring to realize purpose of eliminating structure vibration response. The device used for realizing said method is also disclosed.

The invention discloses a navigation positioning method for a tour inspection robot of a transformer substation. The imaging positions of tracking navigation lamps in an infrared thermal imager are detected, so that the moving direction of a trolley is determined, and the aim of tracking is fulfilled; in order to position the robot in a moving process, a cradle head is horizontally rotated until an image of a positioning navigation lamp in the infrared thermal imager is in the center, the distance to the next fixed point is calculated according to the horizontal rotating angle of the cradle head and the moving distance of the trolley is calculated according to the sizes of images of the tracking navigation lamps in the infrared thermal imager, so that the aim of positioning is fulfilled.

The invention relates to the aviation pipeline oil leakage detection technical field, and provides an oil transfer pipeline oil leakage detection system based on fiber grating and a work method thereof; the detection system comprises a detection sensor, a multi-channel wavelength demodulator and a computer; the detection sensor comprises a substrate material, a sensitive material, and the fiber grating; the fiber penetrates the sensitive material and the substrate material; two rasters of different wavelengths are arranged between the sensitive material and the substrate material; the raster in the sensitive material is a detection raster; the raster in the substrate material is a reference raster; the reference raster and the detection raster are symmetrically arranged in the joint of anairplane conduit. The detection system can fully monitor the oil leak conditions of airplane fuel oil, lubricating oil and hydraulic oil system pipelines, thus providing timely and accurate information for daily maintenance and air dangerous case treatments, and ensuring flight safety.

The invention discloses an electronic gear detection mechanism based on photoelectric sensors. The electronic gear detection mechanism comprises an operation rod and a handle base, wherein the operation rod is formed by sequentially connecting an operation handle, a center ball and a telescopic pointed head, the center ball and the telescopic pointed head are arranged in the handle base, a plurality of light shielding baffle plates are uniformly arranged on the center ball in the circumferential direction of the operation rod, a photoelectric sensor group connected with an electronic gear control circuit is respectively arranged in the handle base corresponding to each light shielding baffle plate, and the photoelectric sensor group consists of at least two layers of photoelectric sensors. The electronic gear detection mechanism based on the photoelectric sensors has the advantages that the structure is simple, the manufacture is convenient, the mechanical vibration resistance performance and the electromagnetic interference performance are high, and the mistake triggering can be effectively avoided.

The invention provides a minimally-invasive-surgical-robot four-dimensional force sensor based on fiber gratings. The minimally-invasive-surgical-robot four-dimensional force sensor based on the fibergratings is mainly formed that nine fiber bragg gratings are bonded onto four narrow beams and four wide beams formed after being cut by eight axial cutting grooves on a hollow glass fiber round barrespectively, and the nine fiber bragg gratings are used for measuring the radial force Fx, the radial force Fy, the axial force Fz and the torque Mz of an end executor of the a hollow glass fiber round bar 2. In order to increase the sensitivity of force perception, the hollow glass fiber bar is subjected to hollow cutting; in order to reduce coupling between all forces, the roots of one ends ofthe four residual narrow beams after cutting are aslant cut to allow the four narrow beams to form cantilever beams, and coupling between multidimensional force is reduced. In addition, for the condition that the fiber gratings are easily influenced by the temperature, temperature compensation optical gratings are arranged on the outer wall of the hollow glass fiber round bar. The minimally-invasive-surgical-robot four-dimensional force sensor based on the fiber gratings is high in accuracy, is not influenced by electromagnetic interference, and is low in cost.

The invention discloses a four-conducting-probe measurement signal-processing system for gas-liquid two-phase flow detection; voltage signals detected by probes are subjected to filtering, denoising, shaping and other processing, so that a signal acquired by a subsequent acquisition card can more really and conveniently show bubble information in a gas-liquid two-phase flow. For ensuring that the signals of the four probes are not affected with each other, at the same time, for ensuring that the amplitude of an output signal of a processing circuit conforms to the acquisition range of the acquisition card, and in the circuit design of the processing system, an isolated operation amplifier is used for each channel of signal and is used for isolating and amplifying the signal. In addition, because the precision of latter signal processing is directly affected by the amplitude and width of the probe signals, for ensuring the parameter-obtaining precision of the probe measurement system, the signal processing system adopts vast denoising measures in the aspects of signal conditioning and transmission, for example, connectors, shielding circuits, filter circuits and the like with good anti-interference performance are used.

The invention relates to an extreme ultraviolet-ray space remote communication system. The extreme ultraviolet-ray space remote communication system comprises an extreme ultraviolet pulse generation modulator, an extreme ultraviolet collimator, an extreme ultraviolet focuser and an extreme ultraviolet detection demodulator; the extreme ultraviolet pulse generation modulator is arranged on the focal point of the extreme collimator and used for modulating a to-be-transmitted digital signal, and the signal is output in an extreme pulse signal form; the modulated extreme pulse signal is transmitted in an orientation manner after being collimated by the extreme ultraviolet collimator; the extreme ultraviolet focuser is used for receiving the extreme ultraviolet pulse signal and focusing the extreme ultraviolet pulse signal, and the extreme ultraviolet detection demodulator which is arranged on the focal point of the extreme ultraviolet focuser is used for demodulating the extreme ultraviolet pulse signal to obtain the to-be-transmitted digital signal.

A DC-component-based fault classification apparatus and method for a three-phase power distribution cable are provided. The apparatus and the method reconstruct three-phase currents by measuring the magnetic field around the cable with an array of magnetic sensors arranged around the cable surface (with a shielding cover being mounted to shield outer interference magnetic field), and a fault variety is determined through the DC components and polarity after a fault. A data acquisition system acquires analog signals from the sensors and a processing system extracts DC components, by mathematical morphology, in the analog signals for the phases during the transient period after a fault. These DC components arise in the faulted phases when a fault occurs since there is a large current changein the inductive power network.

The invention discloses a sandwiched type piezoelectric manipulator based on a spherical joint and a control method of the manipulator. The manipulator comprises a palm platform and at least two fingers; each finger comprises a first joint, a first phalanx, a second joint and a tail end phalanx which are sequentially connected; the first joints and the second joints are the same in structure, andeach comprise two symmetrically installed two annular vibrators; every two annular vibrators are coaxially fixed to the upper side and the lower side of a supporting frame; the upper annular vibratorof each first joint is connected with the corresponding first phalanx, and the upper and lower annular vibrators of each second joint are connected with the corresponding tail end phalanx and the corresponding first phalanx correspondingly; the annular vibrators are provided with bending vibration electric ceramic wafers; and due to the fact that electric signals are loaded for the bending vibration electric ceramic wafers in setting of a polarization manner, the annular vibrators deform so that the action changing of the phalanxes can be driven. The manipulator is not provided with an extra transmission chain, the structure is simple and compact, and microminiaturization is facilitated; and each joint has two rotating freedom degrees, functions are flexible, responding is fast, precisionis high, and electromagnetic interference influences are avoided.

The invention discloses a method for locating and detecting a deep high-density inclined ore body under in a full spatial domain based on tunnel gravity and belongs to the geophysical prospecting technical field. According to the method of the invention, the deep high-density inclined ore body can be located and predicted through using gravity anomalies and X, Y and Z-direction gravity gradient anomalies. The method mainly comprises tunnel gravity and gravity gradient observation and correction of observation data, wherein the correction of the observation data involves solid tide earth tide correction, zero drift correction, terrain correction, Bouguer correction, latitude correction, tunnel correction, goaf correction, backfill area correction and the like, so that gravity anomaly valuesand X, Y and Z-direction gravity gradient anomaly values can be obtained. With the method adopted, difficulties in locating a high-density inclined ore body in a full spatial domain and difficultiesin accurately locating and detecting of a deep high-density inclined ore body of other geophysical prospecting methods which are subjected to electromagnetic interference and have multiplicity of solutions for abnormalities can be eliminated.

The invention discloses an online monitoring system for a lightning arrester of a power system. The ground (low voltage side) converts electric energy into optical energy through an optical power transmission module, transmits the optical energy to a power conversion module located in an elevated position (high voltage side) through an optical fiber and converts the optical energy into DC voltage(electric energy), thereby achieving power supply for an online monitoring device for the lightning arrester. Compared with an existing energy supply mode, the online monitoring system has the advantage that the energy is transmitted by adopting the optical fiber, so that power supply equipment (an optical power transmission module of the ground) is completely electrically isolated from electric equipment (the online monitoring device for the lightning arrester). Meanwhile, the transmitted laser (optical energy) is not affected by electromagnetic interference, so that transmission in the optical fiber is not disturbed by external factors. Finally, by adopting a ground energy supply mode, the online monitoring system is safe and reliable for a long period of time.

The invention provides a force measurement method of an FBG force measurement anchor rod, and belongs to the technical field of anchor rod monitoring, the problems that the monitoring accuracy of the existing anchor rod monitoring device is unstable and that the installation is complicated can be solved, and the force measurement anchor rod is composed of an anchor rod, an anchor rod anchoring agent, an FBG optical grating, an optical fiber connecting line, a backing plate and an anchor rod locking device. Three grooves are formed in the surface of the anchor rod along the axial section direction in a manner of forming 120 degrees with one another, fiber bragg grating strings are disposed in the grooves, and 5 FGB sensors are equidistantly arranged along the length direction of the anchor rod. The full name of FBG is Fiber Bragg Grating, that is, fiber Bragg grating. The force measurement anchor rod adopts the FBG as an intelligent sensing element, which can not only detect the axial load of the anchor rod, but also can detect the radial load of the anchor rod. The device provided by the invention has the advantages of simple structure, convenient installation, high accuracy and good stability.

The invention provides a single-core two-way plastic optical fiber system which is long in transmission distance, convenient to install and low in cost, wherein the single-core two-way plastic optical fiber system solves the problems that an existing quartz optical fiber is not easy to install and maintain, an existing SI type plastic optical fiber is short in transmission distance and an existing GI type plastic optical fiber is high in cost. Meanwhile, the invention provides multiple types of plastic optical fiber connectors, wherein the problem that due to the fact that the diameter of the GI type plastic optical fiber is larger than the diameter of the quartz optical fiber and smaller than the diameter of an ordinary plastic optical fiber, the GI type plastic optical fiber can not be used in cooperation with an existing optical fiber connector is solved. The single-core two-way plastic optical fiber system comprises a single-core plastic optical fiber and two plastic optical fiber connectors, wherein the singe-core full duplex mode serves as the signal transmission mode of the single-core two-way plastic optical fiber system, the plastic optical fiber is a full-fluoroplastic optical fiber of the FONTEX type of the AGC and belongs to one type of GI type plastic optical fibers, and the two plastic optical fiber connectors are connected to the two ends of the plastic optical fiber respectively and can be replaced.

The present invention discloses a steel rail flatness and torsion detection device and method. The device comprises a plurality of spectral confocal displacement sensors and a plurality of linear laser contour sensors. The spectral confocal displacement sensors are symmetrically arranged at two sides of a steel rail and two sides of the bottom portion of the steel rail to measure distances from the side of a rail head of the steel rail and measured points at the bottom portion of the steel rail to the sensors; the linear laser contour sensors are put at the top portion of the rail head of thesteel rail to collect a steel rail tread curve; and the spectral confocal displacement sensors and the linear laser contour sensors are connected with a data collection storage to perform analysis andprocessing to obtain the flatness and torsion of the steel rail. The detection method mainly employs the spectral confocal displacement sensors and the linear laser contour sensors to collect geometrical parameters of the surface of the steel rail to obtain flatness and torsion of the steel rail through data analysis and calculation.

The invention relates to a power utilization information acquisition device, which comprises a power distribution system and a master station system, wherein the power distribution system comprises a power distribution cabinet, and the power distribution cabinet comprises a cabinet body and a concentrator arranged in the cabinet body. The power utilization information acquisition device is characterized in that the concentrator and the master station system are connected in a switched manner by adopting a plastic optical fiber channel and a quartz optical fiber channel, the concentrator is provided with a collector which is connected in series through a first plastic optical fiber, the collector and the concentrator form a series closed loop through the first plastic optical fiber, and the collector is connected to an electric energy meter which is connected through a second plastic optical fiber. The power utilization information acquisition device has the advantages that the whole power utilization information acquisition device realizes data communication through the first plastic optical fiber and the second plastic optical fiber, the average meter reading time of each house can be shortened to less than one second, the overall meter reading period is short, the real-time performance is high, the overall communication rate is high, the reliability is high, the bit error rate is low, the power consumption is low, the device is not subjected to influences of electromagnetic interference and does not externally generate radiation, the operation and maintenance cost can be reduced by 95% compared with the existing operation and maintenance cost, and the work efficiency is improved.

The invention discloses a transformer oil temperature monitoring apparatus based on a fiber grating principle. The apparatus comprises a cabinet, a switch power supply, an installation plate, a grating module, a demodulation instrument and four temperature probe, wherein the side surface of the outer side of the installation plate is connected with the side surface of the inner side of the cabinet, one end of the switch power supply is connected with the surface of the installation plate, the grating module is provided with a fixation hole, the grating module is fixedly connected with the installation plate through the fixation hole, the demodulation instrument comprises a demodulator and a main control board, each temperature probe is internally provided with two fiber grating sensors, the other sides of the temperature probes are connected with eight ST ports of the grating module, the eight ST ports of the grating module are disposed at the bottom, wires of a power supply and a serial port of the grating module are disposed on the top, the main control board and the switch power supply are connected, the master control board is provided with a display screen, and the display screen is corresponding to a cabinet door window. The transformer oil temperature monitoring apparatus is not affected by electromagnetic interference, and is high in precision, fast in reaction, high in corrosion resistance and long in life.

The invention discloses a device for detecting an end screen current parameter of a high-voltage transformer bushing in real time, and a control method for the device. According to the device, a micro current sensor and a proportion amplifier are respectively connected with a light modulator; an optical fiber transmission system is connected with the light modulator and a light signal receiving converter respectively; an isolation power supply is connected with the light modulator; the micro current sensor senses and measures an end screen current signal; the proportion amplifier amplifies a voltage signal output by the micro current sensor; the amplified voltage signal is converted into a light pulse signal through the light modulator and is transmitted to the signal receiving converter through the optical fiber transmission system; the light signal is demodulated in the signal receiving converter; and an end screen current parameter real-time detection signal is output. The device has the advantages that a measurement result is accurate and reliable; the electric insulation performance and the electromagnetic interference resistance are high; and the device is extremely high in temperature stability and vibration resistance characteristic.

The invention provides an elbow control device for an electrically powered wheelchair. The elbow control device is installed on an armrest of an electrically powered wheelchair and is in transmission connection with a control handle on a controller of the electrically powered wheelchair. The elbow control device comprises an elbow carrier, a connecting mechanism, a two-degree-of-freedom transmission mechanism, a handle drive mechanism, a bulb and a fixing mechanism, wherein the elbow carrier, the connecting mechanism, the two-degree-of-freedom transmission mechanism, the handle drive mechanism and the bulb are connected in order. The bulb is fixedly connected with a control handle; the fixing mechanism fixes the two-degree-of-freedom transmission mechanism to an armrest of an electrically powered wheelchair. The elbow control device allows a patient to control an electrically powered wheelchair to move by using the residual power of the shoulders and elbows, is suitable for physically-disabled people, such as people with hand dysfunction, wrist dysfunction, incomplete fingers, wrist amputation and below-elbow amputation, and enables such people to control and use an electrically powered wheelchair on the condition that the joints and the muscle force of the upper arms or the shoulders and elbows thereof are good.

The invention discloses a signal generation and comparison device and method based on optical fiber transmission. The signal generation and comparison device comprises a ground operation control system and an information processing subsystem, a signal transceiving subsystem and a 10-gigabit switch of a civil service platform. The ground operation control system and the information processing subsystem of the civil service platform organize service information needing to be sent out of a station to generate baseband signals and send the baseband signals to the signal transceiving subsystem. Thesignal transceiving subsystem of the civil service platform is responsible for generation of information frames and signal spread spectrum modulation, signals are transmitted to a ground operation control system through optical fibers, meanwhile, time delay information is obtained by comparing the signals transmitted back through the optical fibers with outbound signals, and relevant parameters of signal transmission are adjusted. According to the invention, the signal interaction architecture and the optical fiber transmission signals are compared to realize the signal combination transmission of the main control station and the civil station, so that the security of the service information of the main control station is enhanced, the time delay stability of the system is improved, and the maintenance difficulty and cost are reduced.

The invention discloses a heat dissipation and electromagnetic interference prevention device for network equipment, which comprises a shell, a plurality of placement bins are arranged in the shell, a heat dissipation plate is arranged on one side of the shell, a plurality of first heat dissipation holes are formed in the heat dissipation plate, and sliding grooves are formed between the heat dissipation plate and the placement bins; an elastic piece is arranged at one end in the sliding groove, an air bag is arranged at the other end in the sliding groove, a sliding block is arranged between the elastic piece and the air bag, a plurality of second heat dissipation holes are formed in the sliding block, and the second heat dissipation holes are communicated with or staggered with the first heat dissipation holes along with sliding of the sliding block. The device not only meets the conventional working requirements of the network equipment, but also can divide each working area, realize fixed-point efficient cooling and ensure the heat dissipation efficiency and heat dissipation effect of the device, and meanwhile, the device also can judge whether the device is influenced by electromagnetic interference or not according to the displacement difference detected by each displacement sensor, so that the working efficiency of the device is improved. Therefore, electromagnetic interference can be prevented, and the efficient heat dissipation performance of the device can be continuously realized. The invention is applied to the technical field of network equipment.

The present invention provides a road-use optical fiber grating interlayer relative horizontal displacement sensor. According to the technical scheme of the invention, the test on the relative horizontal displacement between layers inside a pavement structure is realized. A top cover is embedded into the bottom of an upper-layer structure. A center column is connected with a top cover and a uniform strength beam, so that the top cover and the uniform strength beam move together. A bottom plate is embedded into the top of a lower-layer structure, and monitors the mutual displacement condition of the above two layers. A fixed ring is used for fixing the top cover and the bottom plate. Under the fixation of the fixed ring, only a tangential displacement is generated between the top cover and the bottom plate, so that the top cover and the bottom plate are not mutually separated. A silica gel pad is placed between the fixed ring and the bottom plate to limit the rotation of the bottom plate and the top cover, so that the top cover and the bottom plate are rebounded after the displacement. A fixed plate is used for fixing the silica gel pad of and other structures, so that the silica gel pad of and other structures are located inside the bottom plate. The uniform strength beam converts the horizontal sliding generated by the sensor into the vertical displacement. A sliding groove is arranged in the bottom plate and a glass cover plate is covered onto the sliding groove to increase the scratch resistance thereof. An optical fiber grating is stuck onto the uniform strength beam by a special structural adhesive, and the deformation of the uniform strength beam is converted into the wavelength change of the optical fiber grating.

The invention discloses a remote automatic monitoring system for subgrade settlement. The system comprises a monitoring terminal, an optical fiber sensing terminal and a transmission optical cable, wherein the transmission optical cable is connected with the optical fiber sensing terminal and the monitoring terminal; the optical fiber sensing terminal comprises an optical divider, an optical fiber displacement encoding device, a shell and a transmission device; the optical divider, the optical fiber displacement encoding device and the transmission device are arranged in the shell; and the optical divider is connected with the optical fiber displacement encoding device. By the optical fiber sensing terminal and the transmission device, the displacement of the subgrade settlement is converted into an optical code transmitted along an optical fiber, the optical code is remotely transmitted to the monitoring terminal through the transmission optical cable, and is subjected to operation such as photo-electric conversion, analysis processing, storage, display, alarm and the like in the monitoring terminal, and the subgrade settlement is remotely and automatically monitored in real time finally; and the remote automatic monitoring system is applied to the field of monitoring of subgrade settlement under complicated terrains and severe natural environments.

The invention provides an electric field distribution monitoring device of an ultrahigh-voltage circuit insulator. The electric field distribution monitoring device comprises an equipment end, an insulation rod and an optical electric field sensor, wherein a computer, an analogue divider, a filter, a photoelectric converter, a light-emitting diode and a storage battery are sequentially arranged inthe equipment end from right to left, a storage chamber is arranged on the equipment end, a bottom plate is arranged in the optical electric field sensor, a Pokeles component is arranged at the top of the bottom plate, a one fourth wave plate and an analyzer are respectively arranged at two ends of the Pokeles component, the light-emitting diode is connected with the one fourth wave plate by a first fiber, and the analyzer is connected with the photoelectric converter by a second fiber. The electric field distribution monitoring device of the ultrahigh-voltage circuit insulator is reasonablein design, the optical electric field sensors are all needed to employ passive devices, the problems of uncertainty, poor repeatability and the like of traditional manual operation are changed, the site working intensity can be substantially reduced, the measurement accuracy is improved, and the safety of site operation is guaranteed.

The invention discloses a self-powered multi-dimensional detection and interactive control device and method. The device comprises an X axis (2), a Y axis (3), a rocker (1) and angle sensors (4); therocker (1) penetrates through the X axis (2) and is fixed on the Y axis (3) by using a bolt; two angle sensors (4) are respectively installed at the top ends of the axis (2) and the Y axis (3); and when the rocker (1) rotates, the rocker can drive gears in the angle sensors to rotate around the X axis and the Y axis. Each of the angle sensors (4) comprises a mounting support (11), a hinge (12), afriction plate (13) and a gear (17); one end of the friction plate (13) extends into the two teeth of the gear, and the other end of the friction plate (13) is adhered to the hinge (12) through an adhesive tape; and the hinge (12) is connected with the mounting support (11) through a rotating shaft. According to the self-powered multi-dimensional detection and interactive control device provided by the invention, no extra power supply module is needed, and the influence of electromagnetic interferences caused by a direct current power supply is avoided.

The present invention relates to a maximum principal stress sensor of road fiber grating. The test of the maximum principal stress in the pavement structure can be realized. The sensor comprises spherical housing; a liquid chamber arranged in the spherical housing and consisting of a cavity body and internal fillers; elastic membranes which are fixed at two sides of the liquid chamber through fixed rings and have a force fiber grating arranged at the middle; and a compensation fiber grating arranged at the other side of the elastic membranes and configured to compensate the measurement error caused by the surrounding environment temperature of the sensor. Compared to a traditional sensor, the stress sensor provided by the invention can measure the pavement structure maximum principal stress, has the measurement result which cannot be influenced by the stress direction, is provided with temperature compensation, is easy in laying networking and wide in application range and can realize the remote distance monitoring, etc.

The invention relates to a crimping type power semiconductor structure and an internal pressure online measurement method thereof, and belongs to the field of power semiconductor devices. The structure comprises a shell and a plurality of parallel subunits; and each subunit comprises a top plate, a flexible assembly, a silver sheet, a molybdenum sheet, a chip and a substrate, wherein the flexible assembly comprises a disc spring group and a conductive copper sheet, and a thin copper sheet is arranged in the middle of the conductive copper sheet, a groove is formed in the side surface of the thin copper sheet, an optical fiber strain gauge and an optical fiber thermometer are installed in the groove, and the optical fiber thermometer is used for temperature compensation of the optical fiber strain gauge. According to the crimping type power semiconductor structure and the internal pressure online measurement method thereof of the invention, real-time measurement of the internal pressure of the crimping type power semiconductor module is realized, and the measurement sensitivity is high.

The invention discloses a tunnel gravity method for judging the deep extension of a high-density upright plate-shaped ore body. Firstly, the Bouguer gravity anomaly is obtained through field tunnel gravity observation and various corrections of observation data. Second, through the field separation of the Bouguer gravity anomaly, the remaining gravity anomaly is obtained. Judging whether the ore body is a vertical ore body according to the symmetry of the residual gravity anomaly of the tunnel, and then judging the deep extension characteristics of the high-density vertical ore body according to the positive or negative of the residual gravity anomaly of the tunnel. This method solves the problem of how to quickly judge the deep extension of high-density ore bodies when single or multiple tunnels see the ore body. It not only provides an important basis for the layout of deep prospecting projects, but also proposes a new method for judging the prospect of deep ore body resources.