1218results about "Force measurement using piezo-electric devices" patented technology

The invention discloses a force and acceleration composite sensor and an adjusting method, and belongs to the field of sensors. According to the technical scheme, the force and acceleration composite sensor comprises a sensor shell, an acceleration detection assembly comprises an acceleration detection core body, a first positioning face and a first pressing block are arranged in the sensor shell, the acceleration detection core body is located between the first positioning face and the first pressing block, and a screwing screw rod is arranged on the first pressing block; a first threaded hole is formed in the sensor shell, and the tightening screw is in threaded connection with the first threaded hole; the force detection assembly comprises a force detection core body, a second positioning surface and a second pressing block are further arranged in the sensor shell, the force detection core body is located between the second positioning surface and the second pressing block, and a jack assembly is arranged on the face, opposite to the force detection core body, of the second pressing block. According to the scheme, an adjustable pressing block structure is added, and adjustment of pre-pressure is achieved; and through the rigid connection mode of threaded connection, the springback phenomenon is avoided, and the pre-compression is more stable and accurate.

The invention belongs to the technical field of flexible sensors, and relates to a flexible temperature and pressure dual-mode sensor and array equipment. The temperature and pressure dual-mode sensor comprises a first flexible substrate, a force-sensitive conductive layer, an interdigital electrode layer, a second flexible substrate, a counter electrode layer and a temperature-sensitive layer which are sequentially stacked; the force-sensitive conductive layer comprises a microstructure layer stacked on the first flexible substrate and a conductive layer stacked on the microstructure layer; wherein the material of the microstructure layer comprises flexible resin and expanded microsphere powder, the interior of the microstructure layer is provided with a microsphere micropore structure formed by expansion of expanded microspheres, and the surface of the microstructure layer is provided with a plurality of protrusions and recesses; the temperature-sensitive layer is connected between the two counter electrodes of the counter electrode layer, and the temperature-sensitive layer is made of graphene.

The invention relates to the technical field of precision machining, in particular to a cutting force signal synchronous calibration method based on multi-sensor data fusion, which comprises the following steps of: 1, dynamically preprocessing acquired signals; step 2, constructing a reference time axis based on the spindle current signal, and realizing time domain alignment of multichannel signals by adopting a dynamic time warping algorithm; 3, establishing a feature incidence matrix containing a force-vibration-temperature coupling relation, and generating a fusion cutting force feature vector through frequency domain energy weight distribution; 4, a dynamic transfer function model is constructed, model parameters are updated in real time, and the fusion feature vector is mapped into a calibration cutting force signal; and 5, carrying out dynamic compensation on the calibration signal by adopting a nonlinear inverse compensation and residual modal screening strategy. According to the method, the accuracy of cutting force signals can be remarkably improved, errors and uncertainty in the machining process are reduced, and the production quality and efficiency are optimized.

The invention discloses a miniature piezoelectric driving type detection contact integrated laser module and a contact type calibration method, particularly relates to the technical field of precision measurement, is used for solving the problem of dynamic time-varying interference of high-voltage driving pulses on micro-force signals, and is an interference coupling path synchronous acquisition and dynamic resolving technology based on a distributed electromagnetic probe. Online identification of transient interference energy distribution characteristics is realized; a multi-dimensional parameter fusion mechanism of an interference-response dynamic model quantifies cross-domain characteristics of interference energy, system response and signal noise into a comprehensive suppression coefficient, and reverse compensation waveform injection and adaptive filter dynamic adjustment are performed, so that full life cycle offset of common-mode noise is realized, and damage of residual interference to closed-loop control is avoided; through cross-domain collaborative analysis of laser-mechanical data, a self-healing iteration mechanism of contact type calibration parameters is established, progressive pollution of dynamic interference to a calibration reference is eradicated, and long-term consistency of detection precision under complex working conditions is ensured.

The invention provides a self-powered piezoelectric capacitance sensor for dynamic and static cooperative detection and a preparation method thereof, and the sensor comprises a piezoelectric unit which is used for collecting dynamic signals and comprises a top packaging layer, an upper electrode layer, a piezoelectric layer, a lower electrode layer and a central isolation layer from top to bottom; the self-powered capacitor unit is used for collecting static or low-frequency signals and comprises a bottom packaging layer, a combined lower electrode layer, a power supply layer, a radial isolation layer, a dielectric layer and a combined upper electrode layer from bottom to top, the radial isolation layer is arranged on the outer ring of the dielectric layer, and the power supply layer is arranged on the outer ring of the radial isolation layer; and the lower surface of the central isolation layer of the piezoelectric unit is bonded with the upper surface of the combined upper electrode layer of the self-powered capacitor unit in a face-to-face manner, so that the piezoelectric unit and the self-powered capacitor unit form an integral structure. Dynamic and static load monitoring under the sole complex environment is achieved through the piezoelectric-capacitance multiple effects, power is supplied to the capacitor unit through the power supply layer, and the sensor has the advantages of being high in sensitivity, low in power consumption, good in durability and the like.

The invention discloses a self-energy-supply multi-mode sensing electronic skin based on ionic gel heterojunction array integration and a preparation method and application of the self-energy-supply multi-mode sensing electronic skin. The electronic skin adopts a multi-layer composite structure design and comprises an electrode array layer, a silver paste connecting layer, a nano material doped ionic gel array layer and a pure ionic gel continuous layer, and passive self-energized work is realized through a space ion migration effect at a heterogeneous gel interface. The method is characterized in that the design of a multi-layer flexible composite structure is adopted, space-time coded light, temperature, pressure and humidity four-mode stimulation can be synchronously converted into electroneurographic signals, and a collaborative identification strategy of response intensity dynamic range and synaptic learning / delay time difference is utilized; and high-precision decoupling of the multi-source signals is realized in combination with a classification decision tree algorithm. The electronic skin has the characteristics of flexibility, deformation, environment self-repairing and bionic synapse, and geometrical characteristics of a reconfigurable target source are fused through time-space domain multi-modal data.

The invention provides a flexible piezoelectric sensor and a signal detection method thereof. The flexible piezoelectric sensor comprises a protective layer PDT, a second electrode layer, a flexible composite piezoelectric film layer, a first electrode layer, a flexible square polyimide substrate and a polyurethane adhesive tape. The signal detection method comprises the steps that the flexible piezoelectric sensor is attached to a human body and a sheep, the flexible piezoelectric sensor obtains signal data generated at a test position, the signal data are obtained through the processing module, signal preprocessing is carried out based on an improved filtering method, and a data set with a specific rule of effective signals is obtained. And then the information is sent to a rear end through wireless transmission, so that accurate identification of different behaviors is realized. The invention has the advantages of simple preparation process, small size, good flexibility, convenience in use, stable performance and the like, and can realize detection of heartbeat, respiration and other signals of human bodies and animals in a complex environment.

The invention provides a fiber reinforced structure damage positioning method based on a piezoelectric effect, a fiber reinforced structure is widely applied in multiple fields but is easy to damage, an existing positioning method has defects, and the method comprises the steps of piezoelectric composite material preparation, sensor network construction, signal acquisition and processing, positioning based on a time reversal method and the like. During preparation, specific materials are mixed and stirred and then laid with the reinforced fibers, and the processes of curing molding, polarization, packaging and the like are performed; the sensing network is formed by arranging electrodes on the surface of the composite material; signal acquisition is carried out when the composite material deforms or is damaged under load; and the positioning is to re-excite the acquired signal after time reversal processing, and determine a damage point according to a focusing position. The method has the advantages of high-precision positioning, self-energized real-time monitoring, wide applicability, simple and practical structure and the like, can be applied to various fiber reinforced structures, can effectively solve the problems in the prior art, and has important significance for guaranteeing the safety and reliability of the fiber reinforced structures.

The invention relates to the technical field of sensors, in particular to a three-electrode sensor integrating positioning and pressure detection and a manufacturing method thereof, and the three-electrode sensor comprises a resistor positioning unit, a gasket, a piezoelectric unit and a packaging layer which are connected in sequence; wherein the resistor positioning unit is used for detecting a stressed position; the upper parts of the two gaskets are respectively connected to the edge of the resistor positioning unit, and the lower parts of the two gaskets are respectively connected to the edge of the piezoelectric unit, so that the resistor positioning unit and the piezoelectric unit form a cavity structure; the piezoelectric unit is used for detecting the magnitude of stress; the sensor can collect the pressure position and the pressure magnitude at the same time, has the advantages of being simple in structure, independent in signal and stable in performance, and has great application potential in multiple frontier fields such as flexible sensing, medical instruments and robot grabbing.

The invention relates to the technical field of flexible piezoelectric sensors, and discloses a wide-working-condition multi-dimensional force representation flexible film piezoelectric sensor and a signal analysis method, after a pvdf piezoelectric film is cut in a paper-cut mode, regionalized electrode coating and covering are carried out, and multi-channel signal output is achieved. Therefore, characterization of multi-dimensional force can be realized on one film sensor, and meanwhile, the tension and conformal capability of the sensor are enhanced through the paper-cut design, so that the attachment requirement of a complex surface is met. A multi-layer composite structure is combined and comprises a flexible polymer protection layer and a flexible connection layer, and high sensitivity, excellent tensile property and mechanical durability are achieved through hot pressing and local ultrasonic welding. The sensing capability is enhanced, and the defect of poor tensile property of a traditional PVDF piezoelectric sensor is overcome. The preparation method is simple in process, low in cost and suitable for large-scale industrial production. In addition, the invention provides a deep learning analysis method for multi-channel signals, and classification and nonlinear fitting can be realized.

The invention relates to the technical field of fault detection, in particular to a high-voltage connector loosening fault detection method and device and an automobile, and the method comprises the following steps: forming a surface acoustic wave resonator array based on an interdigital transducer array, an acoustic wave resonator and a flexible waveguide; butting a signal source radio frequency cable with the pin interdigital electrode chip, triggering data acquisition, performing Fourier transform on original data, and judging the loosening risk of the connector according to each parameter threshold value; carrying out three-dimensional modeling on the connector plugging interface, carrying out modal analysis on the model, and obtaining surface acoustic wave frequencies, group velocities and phase distribution under different pre-tightening forces so as to identify a contact force abnormal region; based on a multi-stage early warning mechanism, rapid locking is achieved through electrorheological fluid, and displacement is finely adjusted through a magnetostrictive rod. According to the invention, the loosening hidden danger can be quickly and accurately locked, a tight protection system is constructed by multi-stage early warning and mechanical self-locking, and the loosening risk of the high-voltage connector can be greatly reduced from early warning to active intervention.

The invention relates to a bioelectronic surgical suture for suture tension monitoring, the surgical suture comprises a cannula and a conductive material, the cannula is a hollow capillary tube, and the conductive material is arranged in the cannula through perfusion and is subjected to first laser scanning treatment after perfusion; a micro-nano structure is manufactured on the outer wall of the sleeve through second laser scanning. According to the principle of friction nanometer power generation, the tension of the surgical suture causes the change of the contact area between the suture and tissue and the change of an output electric signal in the collection process, the tension of the surgical suture can be reversely deduced, and the purpose of monitoring the surgical suture tension is achieved. The operation line is a self-powered sensor, and an external power supply is not needed. The operation line can provide different quantitative feedbacks according to different suturing modes and suturing parts, and is combined with clinical suturing experience of doctors to assist in establishing a tension quantitative model, so that the doctors are helped to optimize operation procedures, postoperative complications are reduced, and wound healing is promoted.

The embodiment of the invention discloses a flexible piezoelectric sensor packaged by a fish scale microstructure elastomer and a preparation method thereof, the flexible piezoelectric sensor is provided with a flexible main body structure, the flexible main body structure comprises a first packaging layer, a piezoelectric layer, an electrode layer and a second packaging layer, the central area of the first packaging layer is provided with a rectangular notch, and the piezoelectric layer is arranged in the rectangular notch; a rectangular notch is formed in the first packaging layer, an elastomer packaging layer covers the rectangular notch, the elastomer packaging layer comprises a substrate and a fish scale microstructure, and the stress distribution effect of the elastomer packaging layer is optimized through the fish scale microstructure, so that the composite packaging structure of the first packaging layer and the elastomer packaging layer can guide stress to be concentrated in a specific area; the flexible piezoelectric sensor has the advantages that the flexible piezoelectric sensor is provided with the fish scale microstructure, local strain capacity is enhanced, energy dissipation is reduced, the fish scale microstructure comprises a plurality of fish scale microstructure units, the fish scale microstructure units are arranged in an array mode, and sensitivity and response speed of the flexible piezoelectric sensor under the low-pressure or low-frequency condition are further improved.

The invention discloses a ground wire system, and relates to the technical field of power system safety equipment, and the system comprises a conductive wire clamp assembly which can clamp a ground wire, and a pressure sensor is arranged at the clamping position, and can collect the pressure change of the clamping moment of the ground wire; the placement bin is connected to one end of the conductive wire clamp assembly, a circuit board is arranged in the placement bin, and a single-chip microcomputer, a 4G wireless communication module and an attitude sensor are carried on the circuit board; the attitude sensor can measure attitude information of the grounding wire; the single-chip microcomputer is electrically connected with the pressure sensor and the attitude sensor and can receive pressure and attitude data, and the 4G wireless communication module can upload the collected pressure and attitude data to a cloud server in real time by using a mobile communication network. According to the invention, the hitching state and hitching posture of the grounding wire can be judged in real time.

The invention discloses a displacement monitoring system in underground engineering construction and a monitoring method thereof. According to the system, millimeter-level earth surface deformation is captured in real time through a high-precision GNSS displacement monitoring network, and a sensing-decision-execution closed-loop control system is formed in combination with a three-dimensional pressure sensing array and a dynamic execution mechanism of the intelligent pressure regulating module. And when monitoring that the stress of the supporting structure is unbalanced or the displacement of the surrounding rock is abnormal, the intelligent decision center can generate a pressure regulating strategy within 200 milliseconds to drive the hydraulic servo system and the pneumatic compensation unit to implement accurate pressure correction, so that the displacement expansion trend is effectively inhibited. According to the real-time dynamic balance mechanism, traditional passive early warning is upgraded into active intervention, the sudden collapse risk is reduced by about 60%, and meanwhile material waste caused by excessive supporting is reduced.

The invention relates to the technical field of sensor sensing, in particular to a self-power-generation sensing sensor, a mechanical claw and a mechanical claw clamping force sensing method.The self-power-generation sensing sensor comprises an elastic body, a first friction electrode, a second friction electrode and a multi-channel data acquisition board, and an inner mounting cavity is formed in the elastic body; the first friction electrode and the second friction electrode are oppositely arranged and located in the internal mounting cavity, a negative electrode welding point is formed on the first friction electrode, and a positive electrode welding point is formed on the second friction electrode; and the multi-channel data acquisition board is respectively connected with the cathode welding point and the anode welding point through wires. The flexible triboelectric sensor is formed by the elastic body, the first friction electrode, the second friction electrode and the multi-channel data acquisition board, is not limited by own stretchability, is simple in structure, does not need an external power supply, realizes pressure monitoring of self-power generation, and expands the use scene of the sensor.

A roller for a web processing machine, wherein the roller comprises a roller cylinder having a cylindrical roller core, a roller covering surrounding the roller core, and a lateral surface, wherein the roller covering consists of one or more roller covering layers in the radial direction and contains sensors, characterized in that an electrically conductive shield is arranged in the radial direction between the sensors and the lateral surface; a web processing machine comprising the sensor roller and a counter roller arranged parallel to the sensor roller with an intermediate treatment gap, wherein each of the sensors of the sensor roller can detect the pressure exerted on the sensor roller when passing through the treatment gap.

Disclosed is a sensor for monitoring a composite structure. The sensor includes multiple sensing elements of different sizes, each configured for different respective monitoring tasks. Also disclosed are methods of fabricating the sensor, designing and manufacturing the sensor, and attaching the sensor to the composite structure.

The present invention relates to the technical field of measuring electrical variables, and in particular to a multi-dimensional force measurement device that takes into account both static and dynamic measurements. This device solves the technical problems of traditional six-dimensional force sensors, such as complex and cumbersome structures, overall weight, inability to take into account both static and dynamic measurements, and low measurement accuracy. The device comprises a measurement component and a vibration isolation component; the measurement component comprises a base plate, a top plate, and a cantilever beam; the cantilever beam is connected to the base plate, and the cantilever beam is inserted into a limit groove of the top plate through a support arm. The cantilever beam is provided with a uniaxial strain gauge, a first biaxial strain gauge, a second biaxial strain gauge, an X-type piezoelectric crystal, a first Y-type piezoelectric crystal, and a second Y-type piezoelectric crystal; the vibration isolation component comprises a first horizontal support plate, a second horizontal support plate, a multi-layer isolation sleeve, and a support column, and the adjacent isolation sleeve interlayers are filled with elastic material. The device realizes the combination of static and dynamic measurements, and can capture rapidly changing torques and forces while maintaining high accuracy.

The invention discloses a cable GIS terminal stress-strain sensor and a strain monitoring method thereof, and belongs to the technical field of stress-strain monitoring, and the sensor comprises a sensor structure unit which comprises a metal housing, a fixed contact, a movable contact and a piezoelectric element; the signal processing unit is integrated in the integrated circuit shell and comprises a charge collector used for converting a charge signal of the piezoelectric element into an analog voltage signal; the pulse charge discharger is connected to the output end of the charge collector in parallel; the analog-to-digital converter is connected with the output end of the charge collector and is used for converting the analog voltage signal into a digital signal; the serial communication interface is used for outputting digital signals after analog-to-digital conversion; the mounting unit comprises a fixing hole position and an adhesive base which are arranged on the metal shell; the cable GIS terminal stress strain monitoring device is used for monitoring the stress strain of the cable GIS terminal in the operation process so as to reflect typical structure defects appearing in the cable GIS terminal, and online monitoring of the cable GIS terminal equipment is achieved.

The invention discloses a recreation facility track error measuring vehicle, and relates to the field of recreation facility track detection, a driving system comprises two driving devices symmetrically arranged on the two sides of the front portion of a vehicle frame, and the driving devices are used for being clamped on a track and can drive the vehicle frame to run along the track; the front measuring system comprises a horizontal sensor and two front walking devices symmetrically arranged on the two sides of the rear portion of the vehicle frame, and the horizontal sensor is arranged on the vehicle frame. The rear measuring system comprises a middle piece, an acceleration sensor and two rear walking devices symmetrically arranged on the two sides of the middle piece, the front end of the connecting piece is connected with the frame through a first universal connecting part, the rear end of the connecting piece is connected with the middle piece through a second universal connecting part, and the acceleration sensor is arranged on the middle piece; a marking mechanism is arranged on the rear walking device and used for marking on the track. The recreation facility track error measuring vehicle can measure manufacturing errors and installation errors at the same time, and the measuring efficiency is improved.

The invention discloses an automatic system for brake spring force detection, which relates to the technical field of mechanical engineering and automatic control, and is characterized in that a multi-physics field coupling measurement module adopts a nested force sensor group (a strain gauge and piezoelectric quartz compound) and non-contact displacement measurement, and is combined with a thermal expansion compensation ring to correct temperature influence in real time; the environmental interference suppression module eliminates electromagnetic and thermal interference through an electromagnetic shielding cavity and a temperature control platform; the dynamic error compensation engine realizes drift prediction and physical field fusion by using six-dimensional attitude sensing and edge calculation (LSTM + GPR double-stage model); the self-calibration executing mechanism completes nanoscale positioning and micro-force control based on air flotation driving and the bionic clamping jaw. The method solves the problem of measurement misalignment caused by environmental interference, material thermal deformation and clamping errors in traditional detection, and is suitable for high-precision spring force detection under complex working conditions.

A load sensor that includes: an upper housing having an upper face portion, and a lateral face portion that extends in the thickness direction from an outer periphery of the upper face portion; a lower housing having a lower face portion that faces the upper face portion in the thickness direction, the lower housing being less elastically deformable than the upper housing; and a piezoelectric resonator in a space between the upper housing and the lower housing, wherein an end portion of the upper housing and an end portion of the lower housing are fixed to each other with a crimp such that the upper housing is elastically deformed and causes a preload to be applied by the upper housing to the piezoelectric resonator in the thickness direction.

The invention belongs to the field of MEMS sensors, and discloses a high-temperature-resistant MEMS pressure sensor chip and a packaging structure thereof. The chip is provided with an SOI substrate, an AlN layer and a SiO2 layer from bottom to top, a plurality of P-type piezoresistors are arranged on the uppermost layer of the SOI substrate and are symmetrically distributed at the stress concentration position of the edge of the elastic diaphragm; a channel which continuously penetrates through the AlN layer and the SiO2 layer is arranged above the P-type piezoresistor; a metal Pad is arranged in the channel; the upper end of the metal Pad is located on the uppermost layer of the high-temperature-resistant MEMS pressure sensor chip, and the lower end of the metal Pad is in contact with the P-type piezoresistor. According to the invention, the relatively thick buried oxide layer can resist a high-temperature severe environment, and an AlN heat dissipation material with a high heat conductivity coefficient is deposited, so that rapid heat dissipation at a high temperature is ensured; and meanwhile, the stability and the reliability of the sensor are improved by adopting leadless packaging, and the packaging density is further optimized.

The invention discloses a centripetal force sensor and a using method thereof, and belongs to the field of sensors. According to the technical scheme, the centripetal force sensor comprises a fixed part and a rotating part, the rotating part comprises a sensor shell, the sensor shell is hollow, a center signal column is fixedly installed in an inner cavity of the sensor shell, a plurality of notches are formed in the outer circumferential face of the center signal column, and mass blocks are placed in the notches; piezoelectric ceramics are arranged on the outer side of the mass block, and the piezoelectric ceramics and the mass block are clamped between the inner wall of the sensor shell and the outer wall of the center signal column. The sensor is directly installed at the rotation center of a detected object, additional centrifugal force generated by the mass of the sensor approaches to zero, the authenticity of the detection result is greatly improved, meanwhile, the sensor is in direct conductive contact with the signal output structure through the center signal column, the mouthpiece does not rotate along with the detected object, and the detection accuracy is improved. The winding and pulling faults of the mouthpiece and an external pipeline are completely eradicated, and the durability of the sensor is improved.

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 discloses a flexible pressure sensor based on a metal oxide thin film transistor and a preparation method and application thereof. The flexible pressure sensor based on the metal oxide thin film transistor comprises a flexible substrate, a gate electrode layer, a gate dielectric layer, a metal oxide channel layer, a source electrode, a drain electrode and a piezoelectric layer, the piezoelectric layer comprises a piezoelectric polymer, ZnO nanoparticles and MXene nanosheets, and the surface of the piezoelectric layer is provided with a convex micro-nano structure. The flexible pressure sensor based on the metal oxide thin film transistor has the advantages of excellent electrical properties, good flexibility, high sensitivity, easy integration, simple preparation process and low cost, is suitable for the production of large-scale sensor arrays, and has very wide application prospects in the fields of flexible touch screens, human-computer interaction, electronic skin and the like.

The invention relates to the technical field of stress monitoring, in particular to a piezoelectric ceramic system for stress monitoring, which comprises a distributed sensing network module, a stress signal processing module, a stress feature extraction module, an intelligent positioning module and a monitoring feedback module. Mechanical stress is converted into charge signals through a piezoelectric ceramic sensor array and a sensor group, spectrum correlation cross validation is carried out on multiple paths of signals through high-fidelity conditioning and digital processing, and abnormal data are effectively eliminated; vibration mode characteristics are extracted through collaborative time-frequency domain analysis, and damage risk parameters are calculated to distinguish damage types; the intelligent positioning module determines a damage area and endows different confidence levels with the damage area in combination with a sensor spatial topological relation and an abnormal association mode; and the monitoring feedback module executes graded early warning. According to the method, the reliability of monitoring data, the sensitivity of early damage identification and the accuracy of damage positioning are remarkably improved, and intelligent graded early warning based on risk confidence is realized.

The invention provides a high-precision force sensor chip packaging structure and a detection method, and the structure comprises a ceramic pedestal, the top end of the ceramic pedestal is provided with a first accommodation groove, the lower part of the first accommodation groove is provided with a second accommodation groove, the second accommodation groove is communicated with the first accommodation groove, the connection part of the first accommodation groove and the second accommodation groove forms an accommodation area, and the first accommodation groove and the second accommodation groove are communicated with each other. A plurality of internal electrodes are arranged in the accommodating area; one end of the crystal chip in the length direction is fixed in the accommodating area, the other end of the crystal chip is suspended, a chip electrode is arranged at the top end of the crystal chip, and an electrode pin of the chip electrode is electrically connected with each internal electrode; the metal sealing ring is arranged at the top end of the ceramic base; the upper cover covers the top end of the metal sealing ring; and the plurality of external electrodes are arranged on the outer side wall of the ceramic base at intervals. The chip packaging structure has the advantages that external force can be effectively transmitted into the oscillation area on the chip, the chip and the packaging structure both have high force frequency coefficients, dynamic and static conditions are detected at the same time, and the high-precision effect of mechanical detection is achieved.

The invention discloses a pressure detection system, and relates to the technical field of intelligent wearing, and the pressure detection system comprises 1) a flexible substrate layer which is used for fitting skin and sensing external tiny pressure changes; the micro-column array layer is composed of a plurality of micro-column structures and used for amplifying and conducting the pressure change sensed by the flexible substrate layer; the flexible gel sensing layer is used for receiving the pressure transmitted by the micro-column array layer and generating an electric signal; 4) a packaging layer; an interdigital electrode layer is arranged in the flexible gel sensing layer, an electric signal of the flexible gel sensing layer changes along with the change of external pressure, and the detection of a pressure electric signal is realized through the interdigital electrode layer. By means of the design, high-sensitivity response to tiny pressure changes can be achieved, micro-pressure signals are remarkably amplified, meanwhile, the problem of hysteresis effect generally existing in traditional silica gel or metal film materials is solved, and therefore the response speed of the sensor is greatly increased.