741results about "Force measurement using piezo-resistive materials" patented technology

The invention discloses an ultrasonic enhanced tactile sensor system, a sensor and a sensing method. The tactile sensor system comprises a multi-mode sensing unit and a processing unit. The multi-mode sensing unit integrates an ultrasonic module and a visual tactile sensing module, ultrasonic acoustic impedance matching and optical imaging transmission are achieved through an acousto-optic matching structure, and ultrasonic echo signals and tactile deformation images can be synchronously collected. In the processing unit, an event triggering module detects a contact event based on a tactile image and generates a switching signal, and a self-adaptive processing module dynamically controls an ultrasonic mode, distance measurement during non-contact, and switching to object internal imaging or material property identification during contact according to the switching signal. And the three-level fusion processing module outputs a multi-modal sensing result through signal-level synchronous acquisition, feature-level cross-modal fusion and decision-level task switching. According to the system, multi-dimensional perception of proximity sense, surface texture and deep information is realized, and the pre-judgment and accurate operation capability of the robot in a complex scene is improved.

The invention belongs to the technical field of flexible sensing, and discloses a flexible piezoresistive sensing array based on a triangular truss grid structure weft knitting spacer fabric, which is of a five-layer composite structure integrally woven and formed through a weft knitting process. The first packaging layer, the first electrode layer, the spacer fabric spacer layer, the second electrode layer and the second packaging layer are sequentially arranged from top to bottom; the first packaging layer and the second packaging layer are formed by weaving insulating yarns and are respectively an upper surface layer and a lower surface layer of the spacer fabric; the spacer fabric spacer layer is of a three-dimensional elastic supporting structure and comprises a plurality of first spacer layer transverse rows and a plurality of second spacer layer transverse rows which are formed by alternately weaving the upper face layer and the lower face layer of the spacer fabric through tucking. The first spacing layer transverse rows and the second spacing layer transverse rows are arranged in the spacing fabric in a staggered mode and are sequentially connected end to end to form a transverse row crossing cross-linked type triangular truss grid structure. The flexible piezoresistive sensing array provided by the invention has high structural integrity and long-term stability.

The invention discloses a PDMS / MWCNTs flexible resistive pressure sensor with a double-layer corrugated structure and a preparation method of the PDMS / MWCNTs flexible resistive pressure sensor, and belongs to the technical field of flexible piezoresistive sensors. The PDMS / MWCNTs flexible resistive pressure sensor with the double-layer corrugated structure sequentially comprises a silica gel packaging layer, a copper foil, a PDMS / MWCNTs conductive thin film with a high-amplitude corrugated structure, a PDMS / MWCNTs conductive thin film with a low-amplitude corrugated structure, a copper foil and a silica gel packaging layer from top to bottom, the cross section of the PDMS / MWCNTs conductive thin film with the high-amplitude corrugated structure and the cross section of the PDMS / MWCNTs conductive thin film with the low-amplitude corrugated structure are both in a wave shape, and the wave length of the wave shape of the PDMS / MWCNTs conductive thin film with the high-amplitude corrugated structure is the same as that of the wave shape of the PDMS / MWCNTs conductive thin film with the low-amplitude corrugated structure. And the wave height of the wave shape of the PDMS / MWCNTs conductive thin film with the high-amplitude corrugated structure is higher than that of the wave shape of the PDMS / MWCNTs conductive thin film with the low-amplitude corrugated structure. The flexible resistance type pressure sensor realizes high linearity and good sensitivity in a wide pressure range, has excellent mechanical stability, rapid responsiveness and good durability, and has great potential in the fields of human wearable health monitoring, motion detection and the like.

The present application belongs to the technical field of flexible sensing, and discloses a flexible piezoresistive sensing array based on a triangular truss grid structure weft-knitted spacer fabric, which is a five-layer composite structure integrally formed through a weft-knitting process, and sequentially comprises a first encapsulation layer, a first electrode layer, a spacer fabric spacing layer, a second electrode layer and a second encapsulation layer from top to bottom; the first encapsulation layer and the second encapsulation layer are knitted from insulating yarns and serve as upper and lower layers of the spacer fabric respectively; the spacer fabric spacing layer is a three-dimensional elastic support structure, and comprises a plurality of first spacer layer courses and a plurality of second spacer layer courses alternately knitted through tuck stitches on the upper and lower layers of the spacer fabric; the first spacer layer courses and the second spacer layer courses are staggered with each other in the spacer fabric and are sequentially connected at the head and tail to form a triangular truss grid structure in a cross-course crosslinking mode. The flexible piezoresistive sensing array of the present application has high structural integrity and long-term stability.

A pressure distribution monitoring flexible planar mat system with a wide pressure measuring range. The flexible planar mat includes a first electrode layer and a first composite piezoelectric-dielectric layer with a second composite piezoelectric-dielectric layer facing the first layer and a second electrode layer. Each of the first and second composite piezoelectric-dielectric layers includes an elastomeric matrix with conductive and dielectric particles embedded therein. The relative size of the conductive particles and the dielectric particles creates a micro-rough interface between these layers and the electrode layers resulting in a range of contact areas, permitting detection between 0 and 3000 kPa. The flexible planar mat system further includes a data collector that collects a pressure signal from the mat. A pressure distribution data processor receives and calculates data from the data collector and creates a two-dimensional pressure map from the flexible planar mat.

The invention provides a data error compensation method for a biological net port flowmeter, and belongs to the technical field of ocean detection. A multi-dimensional sensor is arranged at a biological net port to collect fluid parameters, a deep learning model is used for recognizing multi-phase flow characteristics, and a corresponding compensation strategy is selected; based on a correlation analysis algorithm, compensation processing frequency is dynamically adjusted to achieve self-adaptive balance of precision and efficiency, the flow state change degree is monitored through the Euclidean distance, compensation parameters are hierarchically adjusted to ensure system stability, a parallel processing architecture is adopted to execute coarse compensation and fine compensation algorithms at the same time, and results are fused according to weights. Finally, dynamic and accurate compensation of the measurement error of the biological net port flowmeter in the complex multiphase flow environment is achieved, and the technical problem that in the prior art, the biological net port flowmeter cannot achieve dynamic and accurate error compensation in the complex multiphase flow environment is solved.

A composite structure for a pressure sensor, a pressure sensor, a method of pressure sensing using the pressure sensor, and a method of fabricating a composite structure for a pressure sensor. The method of fabricating a composite structure for a pressure sensor comprises the steps of forming an array of microstructures made from an elastomeric material; and forming a flexible conductive coating on the array of microstructures such that a surface morphology of microstructures is substantially maintained for the coated array of the microstructures; wherein the conductive coating exhibits a Young's modulus that is higher than that of the elastomeric material.

The invention relates to the technical field of sensors, and provides a flexible pressure sensor and a pressure-sensitive fabric, the flexible pressure sensor comprises the pressure-sensitive fabric, the pressure-sensitive fabric is provided with a pressure detection position for detecting a pressure signal, and the pressure-sensitive fabric is formed by weaving a composite conductive filament and a first non-conductive filament, the composite conductive wire is obtained by doubling a conductive wire and a second non-conductive wire, and the conductive wire is prepared from a conductive material and a base material; the processor is connected with the pressure detection positions and used for processing the pressure signals of the pressure detection positions and outputting pressure distribution information on the pressure-sensitive fabric according to the pressure signals corresponding to the pressure detection positions. According to the pressure sensor provided by the embodiment of the invention, the pressure-sensitive fabric has the characteristics of bending resistance, impact resistance and electric conductivity which is not easily influenced by the environment, and the consistency of the pressure-sensitive fabric is improved, so that the precision of the pressure sensor in various environments is improved.

The invention discloses a preparation method of flexible hydrogel and application of the flexible hydrogel in a pressure sensor, and belongs to the field of flexible sensors. According to the hydrogel disclosed by the invention, polyvinyl alcohol and regenerated cellulose are used as a hydrogel skeleton, and carboxylated carbon black is doped as a conducting medium. The preparation method comprises the following steps: carrying out carbonization treatment on microcrystalline cellulose in a tubular furnace at high temperature to obtain high-conductivity carbon black; then, functional groups are introduced into the carbon black through modification treatment; the method comprises the following steps: dissolving paper pulp in N-methylmorpholine-N-oxide (NMMO), and carrying out cooling, solidification, dialysis and other process treatments to obtain regenerated cellulose; the flexible conductive hydrogel is obtained by adding conductive carbon black and regenerated cellulose into a PVA solution with a certain concentration and introducing sodium tetraborate at the same time. The regenerated cellulose in the hydrogel is rich in a large number of hydrogen bonds, and the flexibility and the self-healing performance of the hydrogel are remarkably improved through the interaction among the hydrogen bonds. The method disclosed by the invention is simple to operate, the prepared hydrogel has better elasticity, self-healing property and conductivity, and the practical application of the hydrogel in the field of flexible sensors is widened.

The invention relates to the technical field of flexible sensors, in particular to a gradient hierarchical porous structure flexible piezoresistive sensor and a preparation method thereof. The sensor is of a laminated structure and comprises an upper flexible packaging protection layer, a lower flexible packaging protection layer, a conductive fabric electrode and a middle piezoresistive sensing layer, and a limiting frame is arranged on the periphery of the sensor. The sensing layer is prepared by adopting a 3D printing ink direct writing technology, and adopted printing slurry takes silicone rubber as a matrix and is uniformly mixed with expanded conductive microspheres and conductive filler. The printing wires are stacked in order to form a macroscopic gradient porous network structure; after the expanded microspheres are subjected to in-situ foaming, micro closed pores are formed in the material, and a rough microstructure is constructed on the surface of the wire material, so that hierarchical multi-scale regulation and control of a conductive network are realized cooperatively, contact sites are increased remarkably, and the sensitivity of the sensor is further improved effectively. The flexible piezoresistive sensor prepared by the invention has the advantages of high sensitivity, wide pressure detection range and high linearity, and has the commercial values of simple preparation process, high repeatability, lower cost and the like.

The invention discloses a piezoresistive pressure sensor chip and a preparation method thereof, and belongs to the technical field of micro-electromechanical systems. The piezoresistive pressure sensor chip comprises a substrate, the back of the substrate is etched with a cavity, the center of the cavity is provided with a cross-shaped mass block, and four hollow islands and four peninsula are arranged along the linear direction of the cross-shaped mass block; a plurality of groups of piezoresistor strips are arranged on the front surface of the substrate, each group of piezoresistor strips comprises a first piezoresistor strip component arranged close to the center and a second piezoresistor strip component arranged close to the side wall of the cavity, and the first piezoresistor strip component forms an internal Wheatstone bridge through a first metal lead group; the second piezoresistor strip component forms an external Wheatstone bridge through a second metal lead group; the glass is arranged on the substrate back. The piezoresistive pressure sensor chip can measure the pressure of a micro-pressure section, can bear high overload equivalent to a plurality of times of the full scale, and has the advantages of high sensitivity, good linearity, high precision, good dynamic performance and the like.

The invention discloses a cable wrapping machine with a wrapping tape gap adjustment function and a cable thereof.The cable wrapping machine comprises a wrapping machine body, a rotating disc is rotationally installed on one side of the wrapping machine body, a pay-off device and an adjusting mechanism are fixedly installed on one side of the rotating disc, and the adjusting mechanism comprises a supporting bottom plate arranged on one side of the rotating disc; a detection assembly and an abutting assembly are arranged on one side of the supporting bottom plate, the detection assembly can detect pressure on the two sides of the wrapping tape, and the abutting assembly can adjust the wrapping tape when the wrapping tape inclines. According to the technical scheme of the invention, through the arrangement of the adjusting mechanism, when a wrapping gap is generated between a wrapping tape and a cable, the detection assembly can rapidly detect the generation of the wrapping gap through the difference between the pressures applied to the two ends of the tension roller, thereby driving the abutting assembly to operate to adjust the gap of the wrapping tape. Therefore, the working efficiency of the wrapping machine and the wrapping effect of the cable are improved.

The invention discloses a monitoring alarm system and method based on multi-modal fusion and regional perception, and the system comprises a multi-source perception module which collects the related data of a patient through a plurality of sensors; the data processing center is used for judging whether an abnormal state occurs or not based on the related data acquired by the multi-source sensing module, and triggering an alarm when the abnormal state occurs; and the notification terminal receives the alarm related information and executes alarm linkage measures. Wherein the data processing center realizes multi-modal data binding of the same patient by using the positioning identification module, so that the position of the patient is accurately positioned; the layered configuration module is used for setting alarm rules according to different patients and different areas. Multiple sensors are adopted for monitoring, the identity and state of a patient are accurately recognized through cross validation of multi-modal data, and the false alarm rate is reduced; a regional division monitoring strategy is adopted, excessive monitoring is avoided on the premise that the monitoring effect is ensured, and resource waste is avoided.

The invention relates to the technical field of underground energy storage, in particular to a gas storage cavern grouting confining pressure real-time monitoring system and method based on the piezoresistive effect, and the system comprises a grouting reinforcement module which is used for injecting grout into a target gas storage cavern and laying a lining to form a grouting reinforcement area; the resistance detection module is used for detecting resistivity distribution characteristics of the grouting reinforcement area in real time; the confining pressure monitoring module is used for analyzing the resistivity distribution characteristics based on a preset piezoresistive modified slurry resistivity-surrounding rock stress relation model to obtain the actual stress state of surrounding rock; and the early warning regulation and control module is used for triggering an early warning signal based on the actual stress state of the surrounding rock and releasing gas. According to the invention, continuous and non-contact measurement of the surrounding rock stress state of the gas storage cavern can be realized.

A force sensor comprising a contact arrangement for transmitting a contact force to a force sensor assembly. The force sensor assembly comprising a first sensor sensing, and producing an output from, a normal contact force component of the contact force; and a body moveable on transmission of the contact force to the force sensor assembly; and a second sensor for sensing, and producing an output from, a relative displacement of the body relative to the second sensor, the a tri-axis contact force being determined from the relative displacement.

The invention relates to the technical field of ice engineering measurement, and discloses an underwater special-shaped structure surface floating icebreaking load spatial and temporal distribution test system, which comprises a flexible high-density distributed pressure sensor array, a high-speed synchronous data acquisition module, an underwater data transmission system and a shore data processing platform, the flexible high-density distributed pressure sensor array is attached to the surface of an underwater target special-shaped structure; the high-speed synchronous data acquisition module is mounted in a sealed cabin in the special-shaped structure of the underwater target, is close to the flexible high-density distributed pressure sensor array and is used for digitalization; the underwater data transmission system is used for communication between the high-speed synchronous data acquisition module and the ashore data processing platform; and the ashore data processing platform is used for reconstructing and visually displaying the pressure field of the special-shaped structure of the underwater target. According to the method, more comprehensive and accurate ice-structure interaction load information can be obtained, and fine structure design is served.

The invention relates to a low-noise high-precision pressure measuring circuit which comprises a bridge type sensor, an alternating-current excitation signal source, a phase-sensitive detector, a low-pass filter, a reference signal source and a signal conditioning amplifier. The alternating current excitation signal source modulates a differential voltage signal generated by the bridge type sensor to a high-frequency alternating current excitation signal generated by the alternating current excitation signal source to obtain a high-frequency pressure signal; the high-frequency pressure signal is amplified by the signal conditioning amplifier to form a modulated signal; the phase-sensitive detector performs frequency mixing on the modulated signal and a reference signal generated by a reference signal source to obtain a frequency mixing signal; the frequency mixing signal is filtered by a low-pass filter to form a direct-current voltage signal for pressure measurement; the reference signal generated by the reference signal source and the high-frequency AC excitation signal generated by the AC excitation signal source have the same frequency. According to the circuit, signals are modulated to a high-frequency area with low noise energy to be processed by adopting alternating-current excitation and coherent detection technologies, the signals and noise are effectively separated, and extremely high measurement resolution and precision are achieved.

The invention relates to a multi-mode cooperative flexible tactile buffer sensor for drone inhabitation, and belongs to the technical field of tactile sensors, the sensor comprises a support, a Hall sensor, an elastic layer, a first magnetic layer, a piezoelectric layer and a protective cover, the top end of the first magnetic layer is bonded to the bottom end of the elastic layer, when an inhabiting drone inhabits and bears force, the piezoelectric layer is attached to the bottom end of the elastic layer, and the piezoelectric layer is attached to the bottom end of the first magnetic layer; the shape of the elastic layer is rapidly changed, the distance between the Hall sensor and the first magnetic layer is adjusted, correspondingly, the intensity of the magnetic field sensed by the Hall sensor also changes, and the inhabiting stress of the inhabiting unmanned aerial vehicle can be calculated according to the change of the magnetic field intensity; then the top end of the piezoelectric layer is bonded to the bottom end of the first magnetic layer, when the inhabiting unmanned aerial vehicle is stressed in motion, the piezoelectric layer generates elastic deformation and generates current, and the motion stress of the inhabiting unmanned aerial vehicle is calculated, so that various states of inhabiting, landing, collision, sliding, falling, shaking and the like of the inhabiting unmanned aerial vehicle are detected at the same time; and closed-loop feedback is provided for self-adaptive inhabitation of the inhabiting unmanned aerial vehicle.

The invention discloses a high-temperature strain film sensor for detecting thermal stress of a small square billet crystallizer, and relates to the technical field of sensors, the high-temperature strain film sensor comprises a composite system formed by fiber structures, the fiber structures are interwoven and interspersed, and the composite system sequentially comprises a substrate layer, a high-temperature insulating layer, a piezoelectric film layer and a multifunctional composite layer from bottom to top; a channel is arranged in the piezoelectric film layer, the channel penetrates to the high-temperature insulating layer and the multifunctional composite layer, and the channel is connected with external equipment through a lead electrode. The multifunctional composite layer comprises a thermocouple array and a sensitive grid unit which are distributed in parallel and interwoven, and the thermocouple array is used for superposing the thermoelectric effect and increasing the output situation; the sensitive grid unit is used for converting strain of the crystallizer steel pipe into electric signals through sensitive grid deformation and outputting the electric signals, and real-time measurement of stress and strain on the surface or in the crystallizer is achieved. The sensor designed by the invention is good in high temperature resistance, good in structural stability, long in service life and high in measurement precision.

The present invention discloses a flexible sensor based on an oxide wrinkle structure and a preparation method thereof, comprising: using a solid-phase method to prepare a Sr3Al2O6 target material and a La-BaTiO3 target material respectively; using a pulsed laser deposition technique to prepare a "La-BaTiO3 / Sr3Al2O6 / SrTiO3" heterostructure using the Sr3Al2O6 target material and the BaTiO3 target material on a SrTiO3 single crystal substrate; using a water-soluble method to electrostatically adsorb a polydimethylsiloxane (PDMS) film on the "La-BaTiO3 / Sr3Al2O6 / SrTiO3" heterostructure. The La-BaTiO3 film was then peeled off from the structure to create a "La-BaTiO3 / PDMS" heterostructure. A gold (Au) electrode was grown on the "La-BaTiO3 / PDMS" heterostructure using magnetron sputtering to create an "Au / PDMS / La-BaTiO3" heterostructure. Another PDMS film was attached to the Au electrode surface of the "Au / PDMS / La-BaTiO3" heterostructure by electrostatic adsorption for encapsulation, resulting in a piezoresistive sensor with the "PDMS / Au / La-BaTiO3 / PDMS" heterostructure. This preparation method offers high process controllability, and the resulting flexible piezoresistive sensor exhibits high precision, high sensitivity, and high reliability. The flexible piezoresistive sensor can adapt to changes in various surfaces and shapes and has a wide range of applications.

The invention relates to the technical field of conductive materials, and discloses a flexible conductive composite material and a preparation method and application thereof. The flexible conductive composite material comprises the following preparation raw materials: a thermoplastic elastomer, a conductive filler, cellulose nanocrystals, an inorganic salt, an organic solvent and water. According to the flexible conductive composite material provided by the invention, the Pickering emulsion is co-stabilized by the cellulose nanocrystal auxiliary conductive filler, the cellulose nanocrystal raw material is easy to obtain, biodegradable, environment-friendly and pollution-free, the Pickering emulsion is good in stability, the conductive filler is directionally enriched on an emulsion interface to form a continuous path, the bottleneck of filler dispersion is broken through, a conductive network structure is complete, and the stability of the Pickering emulsion is improved. The strain sensing response is sensitive, reversible circulation is achieved, the conductive interval is wide, the conductive seepage threshold value is about 1 wt%-2 wt%, when the addition amount of the conductive filler is 10 wt%, the conductivity is about 25 S / cm, and the conductivity is improved in a breakthrough mode.

The invention discloses a flexible pressure sensor and a head-mounted device, is applied to the technical field of sensors, and aims to solve the technical problem of poor consistency of a flexible pressure sensor in an initial compression stage in the prior art. The upper electrode layer comprises a plurality of row electrodes adhered to the inner side surface of the upper packaging layer, and each row electrode is provided with a first hollow position; a piezoresistive conductive layer; a lower encapsulation layer; the lower electrode layer comprises a plurality of column electrodes adhered to the inner side surface of the lower layer package, and each column electrode is provided with a second hollow position; the piezoresistive conductive layer is located between the upper electrode layer and the lower electrode layer, the upper packaging layer is adhered to the piezoresistive conductive layer through the first hollow-out position in the pressing process, and the lower packaging layer is adhered to the piezoresistive conductive layer through the second hollow-out position, so that the deformation degree of the row electrode and the column electrode after pressing can be relieved, the gap between the electrode and the piezoresistive conductive layer is reduced, and the reliability of the device is improved. And the consistency of the initial compression stage and the product measurement accuracy are improved.

The invention discloses a fabric-based compression sensor, a preparation method and a garment comprising the fabric-based compression sensor. The fabric-based compression sensor comprises an upper conductive layer, an isolation layer and a lower conductive layer which are sequentially stacked; yarns containing conductive yarns are woven into the upper conductive layer and the lower conductive layer; non-conductive yarns are woven into the isolation layer; in an unstressed initial state, the upper conductive layer and the lower conductive layer are separated by the isolation layer, are not in contact and are in an open circuit state; after the stress is compressed, the thickness of the isolating layer is reduced, and the upper conducting layer is in contact with the lower conducting layer to form a path; therefore, the overall resistance of the fabric-based compression sensor is greatly changed, and a qualitative change effect is realized. Therefore, the compression sensitivity of the fabric-based compression sensor is very high, the resistance change rate generated when the fabric-based compression sensor is pressed can reach 99% or above, and the fabric-based compression sensor is not prone to being affected by the external environment.

The invention discloses a micro MEMS piezoresistive pressure sensor and a preparation method thereof, and belongs to the technical field of piezoresistive pressure sensors. Comprising a base layer, a substrate layer, a bottom silicon layer, a buried oxide layer, a device layer and a metal layer which are stacked from bottom to top, the bottom silicon layer, the buried oxide layer and the device layer form a peninsula-rod beam reinforced pressure sensing diaphragm; the peninsula-rod beam reinforced pressure sensing diaphragm comprises a peninsula, a connecting beam, a stepped rib plate and a central diaphragm; the peninsula is arranged on the upper surface of the central diaphragm, the stepped rib plate is located on the lower surface of the central diaphragm, the rod beam is arranged along the diagonal line of the central diaphragm, and the square island is arranged at the central position of the central diaphragm; and the stepped rib plates are positioned on four sides of the central diaphragm. The peninsula-rod beam reinforced pressure sensing diaphragm is adopted, the peninsula improves the output voltage of the sensor, the rod beam relieves the phenomenon that the displacement of the pressure sensing diaphragm is excessively increased under high stress, the step-shaped rib plate enables a piezoresistor area to generate stress concentration, and the sensitivity and stability of the piezoresistive pressure sensor are improved.

A pressure and force sensor and method of fabrication for the implementation of the sensor is presented that employs piezoresistive elements having high gauge factors. Example embodiments allow for the implementation of a pressure or force sensing device and method of fabrication that can be tailored to the requirements of a wide range of applications without incurring long development times and high costs. The pressure or force sensor has an unprecedented level of sensitivity and can be used to measure extremely low levels of pressure and force, or alternatively to measure extremely high levels of pressure and forces. Moreover, the example embodiments teach pressure and force sensors suitable for use in harsh environments and can be operated at high temperatures.

A sensor unit (4) for monitoring connectable components is proposed, comprising a base unit (5), an electrode layer (6), and a sensor layer (7). The electrode layer (6) is formed on the base unit (5) and has at least one electrode in electrical contact with the sensor layer (7). Furthermore, the sensor layer (7) is formed on a side of the electrode layer (6) facing away from the base unit (5) and is made of a piezoresistive material such that a change in electrical resistance in the sensor layer (7) can be induced by a mechanical force.

The invention discloses an anti-pinch control method and device for vehicle moving parts, the method and device are applied to a vehicle, the vehicle comprises a plurality of moving parts corresponding to different anti-pinch areas, and the method comprises the steps that a target moving part and a target anti-pinch area corresponding to a moving part control instruction are obtained, acquiring an anti-pinch sensitive coefficient matrix corresponding to the piezoresistive sensor array in the target anti-pinch area, and acquiring a voltage fluctuation matrix acquired by the piezoresistive sensor array arranged in the target anti-pinch area in the process of controlling the target moving part according to the moving part control instruction, and according to the anti-pinch sensitive coefficient matrix and the voltage fluctuation matrix, determining pinch risk information, and if there is a pinch risk, controlling the target moving part according to the reverse control instruction to remove the pinch risk of the target anti-pinch area. According to the application, the risk difference of different positions is reflected through the anti-pinch sensitivity coefficient matrix, and anti-pinch control matched with real risks can be realized.

The invention discloses a flexible multi-dimensional force sensing device, comprising a first insulator having a plurality of three-dimensional structures protruding from the surface; the first conductor is made of a flexible conductive material and is in the shape of long-strip stitches, the stitches are connected with one another to form a conductive network, the stitches are adhered to the surface of the first insulator and distributed on the surface of the three-dimensional structure unit, and the three-dimensional structure unit is used for transmitting borne normal pressure, shear force and torsional force to the corresponding stitches; the first conductor has a piezoresistive effect, when the first conductor is stressed to generate elastic deformation, the stitch is stretched or compressed, and the resistance at the stressed position changes regularly; and connecting each trace of the first conductor to an external electrical impedance scanning imaging device so as to detect pressure information of each position on the surface of the flexible multi-dimensional force sensing device at each moment. On the basis, the flexible multi-dimensional force sensing equipment is simple in structure, low in cost, easy to process, good in fitting degree for a curved surface shape, and excellent in stability and robustness.

The invention discloses a piezoresistive array sensor and a manufacturing method thereof, the piezoresistive array sensor comprises a first flexible substrate layer, a conductive pattern layer, a pressure-sensitive layer, a sealing glue layer and a second flexible substrate layer, the first flexible substrate layer comprises a plurality of independently arranged island-shaped structures, the neck structure is connected with the adjacent island-shaped structures and is provided with a first hole groove; the sealing glue layer comprises hollowed-out grooves, air channel grooves and second hole grooves which are arranged in a communicating mode, the hollowed-out grooves are used for containing the pressure-sensitive units of the pressure-sensitive layer, the air channel grooves are connected between the adjacent hollowed-out grooves, and the second hole grooves are formed in the paths of the air channel grooves; the second flexible substrate layer is arranged on the side, away from the first flexible substrate layer, of the sealing glue layer, a third hole groove is formed in the second flexible substrate layer, and the third hole groove is sequentially communicated with the second hole groove and the first hole groove. The piezoresistive array sensor has high-sensitivity and high-stability pressure detection capability, and can adapt to flexible application scenes such as bending and folding.

The invention relates to the technical field of sensors, and discloses an array type flexible pressure sensor and a data transmission method thereof, and a wearable device, the sensor comprises a flexible transverse conductive layer, a flexible longitudinal conductive layer, a flexible pressure-sensitive material layer, a data selector, a divider resistor and a single-chip microcomputer; the flexible transverse conductive layer is located at the top of the flexible pressure-sensitive material layer; the flexible longitudinal conductive layer is located at the bottom of the flexible pressure-sensitive material layer; a pressure-sensitive sensor is formed at the crossed position of the flexible longitudinal conducting layer and the flexible transverse conducting layer; the data selector is respectively connected with an output port of the flexible transverse conducting layer, an output port of the flexible longitudinal conducting layer and the single chip microcomputer; the divider resistor is connected with an output port of the flexible transverse conductive layer; the single-chip microcomputer is used for controlling the array type flexible pressure sensors to switch rows and columns and collecting voltage values between the pressure-sensitive sensors and the divider resistors. The method can be suitable for fabric pressure measurement and other scenes needing flexible sensing, and occupation of hardware resources is reduced.