84results about "Force measurement using piezo-electric devices" patented technology

The application relates to the technical field of intelligent auxiliary reminding, in particular to an auxiliary reminding method based on a smart wearable device, which comprises the following steps: collecting behavior data of the elderly through a multi-view camera, an infrared sensor and a pressure sensing device, constructing a four-dimensional characteristic behavior sequence graph, and using a deep learning model with a multi-modal fusion and attention enhancement mechanism to analyze behavior semantics and generate graded reminding instructions. The application can accurately monitor the daily behavior of the elderly, dynamically adjust the reminding strategy, trigger an emergency alarm in an abnormal situation and record intervention logs, and effectively improve the life safety of the elderly and the monitoring efficiency.

A battery pack according to embodiments disclosed herein may include: a plurality of battery cells; a first material located between the plurality of battery cells; a piezoelectric sensor adjacent to the first material; a temperature sensor configured to detect the temperature of the plurality of battery cells; and a battery management device configured to determine an anomaly of the plurality of battery cells, an anomaly of the piezoelectric sensor, and an anomaly of the temperature sensor based on information received from the piezoelectric sensor and the temperature of the plurality of battery cells.

The application discloses a kind of haptic temperature synergic sensor comprising flexible substrate material and preparation method thereof.Sensor includes flexible substrate, arrayed haptic sensing unit and multilayer heterostructure temperature-sensitive layer, multilayer heterostructure temperature-sensitive layer is alternately stacked by pressure-sensitive material layer, thermosensitive material layer and conductive material layer and so on Heterogeneous materials can realize the synergic perception of temperature and pressure.By reasonably designing the material properties and interface structure of each layer, the response performance of the sensor to multiple physical quantities is improved.

A battery pack according to an embodiment disclosed herein may include a plurality of battery cells, a first material positioned between the plurality of battery cells, a piezoelectric sensor adjacent to the first material, a temperature sensor configured to detect temperatures of the plurality of battery cells, and a battery management apparatus configured to determine abnormality of the plurality of battery cells, abnormality of the piezoelectric sensor, and abnormality of the temperature sensor based on information received from the piezoelectric sensor and the temperatures of the plurality of battery cells.

A haptic feedback signal detection circuit (211-m), a driving control circuit (200), and a haptic feedback apparatus. The haptic feedback signal detection circuit (211-m) includes: a charge-voltage conversion circuit (2111-m) coupled to at least one haptic detection piezoelectric device (021-m) in a haptic feedback panel (100), wherein the charge-voltage conversion circuit (2111-m) is configured to convert, when a target object is pressed, a charge signal of each of the at least one haptic detection piezoelectric device (021-m) into an initial voltage signal and then output the initial voltage signal; and at least one voltage amplifier circuit (2112-m), wherein the at least one voltage amplifier circuit (2112-m) is configured to sequentially amplify the initial voltage signals into target voltage signals and then output the target voltage signals to a detection output end as haptic feedback signals.

The application relates to the technical field of pressure sensors, in particular to a flexible pressure sensor based on PDMS and a preparation method thereof, the flexible pressure sensor based on PDMS comprises a flexible substrate, a bottom electrode and a top electrode arranged from bottom to top, and further comprises a PDMS dielectric layer, the PDMS dielectric layer is composed of two pieces of PDMS films with different surface microstructures, and the PDMS dielectric layer is located between the bottom electrode and the top electrode or on both sides. On one hand, the method can one-time prepare two pieces of PDMS with complementary surface microstructures based on petal templates, effectively increases the contact and deformation of the PDMS microstructure, and improves the sensitivity of the pressure sensor; on the other hand, a plurality of low-cost molds are arranged in a specific manner, a PDMS with a series of microstructures and a large size can be obtained, and various applications of the PDMS capacitive pressure sensor or the PDMS resistance pressure sensor with different sizes and microstructures in different scenes can be realized.

The disclosure provides a pressure variable sensing layer and a smart cushion, and relates to the technical field of smart cushions. The pressure variable sensing layer comprises a first electrode layer, a second electrode layer and a pressure sensitive layer. The first electrode layer comprises a first base layer and a plurality of first conductive lines, the plurality of first conductive lines extend along a first direction and are arranged at intervals along a second direction; the second electrode layer comprises a second base layer and a plurality of second conductive lines, the plurality of second conductive lines extend along the second direction and are arranged at intervals along the first direction; the pressure sensitive layer is located between the first electrode layer and the second electrode layer, and comprises a plurality of pressure sensitive strips arranged at intervals along the first direction, the plurality of pressure sensitive strips are arranged in one-to-one correspondence with the plurality of first conductive lines; wherein a plurality of ultrasonic welding parts connected together are formed on the first base layer and the second base layer, the plurality of ultrasonic welding parts are distributed on both sides of the plurality of first conductive lines along the second direction and are arranged at intervals in the first direction, thereby improving the generation of wrinkles of the pressure variable sensing layer.

The application discloses a double-vibration-beam differential metal-based two-stage amplification quartz resonant pressure sensing structure, relates to the technical field of micro-mechanical electronic (MEMS) pressure measuring devices, and comprises a pressure probe structure element, wherein the pressure probe structure element is connected with a metal flexible lever structure, the metal flexible lever structure is connected with a first quartz double-end fixed support vibration beam and a second quartz double-end fixed support vibration beam, and the first quartz double-end fixed support vibration beam and the second quartz double-end fixed support vibration beam are arranged in a differential mode. The application realizes differential loading at the mechanical structure level, effectively suppresses the temperature common-mode drift and the influence of packaging residual stress, and improves the measurement precision and stability.

To provide an electronic apparatus capable of detecting a pressed portion of a housing.SOLUTION: The electronic apparatus comprises a housing having a hollow shape, a partition placed in the housing, and a sensor provided at the partition and detecting deformation of the partition. The partition connects a first portion at the inner surface of the housing and a second portion opposite to the first portion.SELECTED DRAWING: Figure 3

A presumption system includes a first sensor capable of being disposed between a wheel and a tire fitted to the wheel, which outputs a first sensor signal corresponding to a pressing force generated by the wheel and the tire, and a processor that presumes a state of a rotating body including the wheel and the tire based on the first sensor signal, the processor generating a first interval signal by dividing the first sensor signal in a certain interval, and presuming the state of the rotating body based on the first interval signal.

The present invention relates to a single-crystal thin-film piezoelectric element (PIEZO) in the form of a plate extending in an extending plane (xy) defined by a first direction (x) and a second direction (y) perpendicular to the first direction, wherein the dimensions (L x , L y ) in the first and second directions are each greater than 100 μm, the thickness (L z ) is less than 50 μm, and the ratio of the thickness to the dimension (L x ) in the first direction or the dimension (L y ) in the second direction is less than 0.1. The piezoelectric element has a first sensitivity (S x ) to deformation in the first direction and a second sensitivity (S y ) to deformation in the second direction. The crystal orientation of the element (PIEZO) is such that abs(S y / S x ) < 0.1, abs((S y +S x ) / S x ) < 0.1, or for at least two first directions (x) of the extending plane (xy) forming an angle of 30° to 60°, abs((S x -S y ) / S x ) < 0.1. The present invention relates to a single-crystal thin-film piezoelectric element (PIEZO).

A pressure sensitive unit, a pressure sensor, a sensor module and an electronic device, the pressure sensitive unit comprising: a substrate provided with a concave cavity, the concave cavity having a first boundary and a second boundary; a piezoelectric resonant part, the piezoelectric resonant part comprising a piezoelectric layer and a substrate, the substrate having a first connecting edge and a second connecting edge, the piezoelectric layer being attached to a surface of the substrate, the first connecting edge being coupled to the first boundary, and the second connecting edge being spaced apart from the second boundary; wherein, under the action of an excitation signal, the piezoelectric resonant part resonates due to the inverse piezoelectric effect of the piezoelectric layer; when an external pressure acts on the piezoelectric resonant part, the piezoelectric layer deforms, the resonant frequency of the piezoelectric resonant part shifts, and the shift amount of the resonant frequency is used to determine the value of the external pressure. The piezoelectric resonant part is connected and fixed to the substrate through the first connecting edge, has the characteristics of higher mechanical stability, not easy to damage, convenient to process, low preparation cost and design complexity, high sensitivity, small size and low power consumption.

Flexible piezoelectric device having a ground plane. This description relates to a piezoelectric device (1000) comprising a substrate (100) covered by a piezoelectric sensor and electrically conductive tracks (200). The device (1000) comprises a ground plane, a first portion (150) of the ground plane covering the sensor and a second portion (220) of the ground plane covering the electrically conductive tracks (200). The first portion (150) of the ground plane is more flexible than the second portion (220) of the ground plane. The first portion (150) of the ground plane is in contact with the second portion (220) of the ground plane at an intermediate zone (Z3) to form a continuous ground plane. Figure for the abstract: Fig. 1B

The present disclosure relates to a device for detecting mechanical force at multiple regions of a surface, the device comprising: a plurality of sensor bodies, wherein each of the plurality of sensor bodies comprises: a deformable material; and a piezoelectric sensor configured to detect a displacement of a region of the surface upon deformation of the deformable material by the region of the surface; wherein the piezoelectric sensor of a first one of the plurality of sensor bodies is isolated from the piezoelectric sensor of a second one of the plurality of sensor bodies such that deformation of the piezoelectric sensor of the first one of the plurality of sensor bodies does not cause deformation of the piezoelectric sensor of the second one of the plurality of sensor bodies.

The application relates to a structural health monitoring system and application thereof. A preparation method of a carbon fiber reinforced thermoplastic composite material involved in the system comprises the following steps: providing a plurality of carbon fiber reinforced thermoplastic resin layers; prepositioning a multifunctional sensor unit array between adjacent thermoplastic resin layers, the multifunctional sensor unit array comprising a functional film containing ferroelectric ceramic, an electrode layer, and an insulating protective layer between the functional film and the carbon fiber layer; wherein the functional film comprises ferroelectric ceramic material with dielectric and piezoelectric response characteristics; and performing selective laser solidification on the layer area prepositioned with the multifunctional sensor unit array, so that the layer interface locally melts under the action of laser heating and embeds the multifunctional sensor unit array between adjacent layers; wherein the peak temperature of the laser heating area in the selective laser solidification process is not higher than 200 DEG C.

An input device includes an operation section and a controller. The operation section includes a piezoelectric element being arranged to receive a force from an operation body. The piezoelectric element includes one piezoelectric body including a first portion being arranged to be displaced through application of a voltage and a second portion being arranged to generate an electric charge through displacement. The operation section is arranged to output a signal responding to the electric charge generated in the second portion. The controller is arranged to acquire information regarding the force received from the operation body based on the signal output from the operation section.

The invention relates to a detection device comprising: a flexible substrate (20) comprising a first surface (30) and a second surface opposite the first surface; a plurality of transducers (21, 22) attached to the substrate; and a plurality of electrical tracks (23, 24) extending over the substrate. Each transducer has: an electroactive polymer film (50); and a first and a second electrode (54) that are stacked on either side of the film. Each of the first and second electrodes of the corresponding transducer (21, 22) has a conductive layer in contact respectively with a first face and a second face (66) of the film.

The utility model is suitable for sensor technical field provides a kind of pressure response integration film sensor, including substrate, lead-out circuit, conductive sensing paste and pressure response paste;Lead-out circuit, conductive sensing paste and pressure response paste are all covered on substrate by printing process, such integrated design can reduce the overall thickness of sensor, and reduce economic cost;Pressure response paste forms pressure zone on substrate, and according to the change of resistance value, the stress change under the static state of sensor is monitored quickly;Conductive sensing paste forms piezoelectric zone on substrate, and according to the change of voltage value, the stress change under the dynamic state of sensor is monitored quickly.

The utility model discloses a kind of piezoelectric sensor based on polyimide nanofiber, sensor includes: polyimide nanofiber layer, the layer has piezoelectric performance, can respond to external mechanical stress, pressure or vibration change and produce electric signal;Electrode layer is set to the both ends of polyimide nanofiber layer, electrode layer is used to collect the electric signal generated by polyimide nanofiber layer;Substrate, substrate is used to support polyimide nanofiber layer and electrode layer, and provide mechanical support;Protective layer, cover electrode layer and polyimide nanofiber layer;Signal processing unit is used to process the electric signal generated by polyimide nanofiber layer and output available sensing signal, the utility model relates to sensor technical field, the piezoelectric sensor based on polyimide nanofiber, high sensitivity and reliability: the piezoelectric performance of polyimide nanofiber layer is excellent, can produce enough electric signal under weak external pressure or vibration effect.

The application provides a battery module, a vehicle and an energy storage device, and belongs to the technical field of battery safety. The battery module comprises a shell, a baffle assembly and at least two battery monomers, the battery monomers and the baffle assembly are accommodated in the shell; the baffle assembly comprises a baffle main body and a pressure sensor, the baffle main body is clamped between the two battery monomers, and the part of the pressure sensor for detecting pressure is fixed on the baffle main body and arranged between the two battery monomers. Since the part of the pressure sensor for detecting pressure is fixed on the baffle main body, the expansion force obtained by the pressure sensor can be corresponded to the specific position of the battery monomer. Even if the expansion force of the battery monomer acts on the part of the pressure sensor for detecting pressure, the part of the pressure sensor for detecting pressure will not be greatly deviated, and the relative position thereof and the baffle main body can be kept within a certain range, thereby further ensuring the accuracy and stability of the expansion force detection of the pressure sensor.

A piezoelectric sensor is provided. The piezoelectric sensor comprises a first base, a first conductive layer adjacent to the first base, a second base, a second conductive layer adjacent to the second base; and a first structure between the first conductive layer and the second conductive layer. The first structure comprises a first layer with a first carbon-based material and a plurality of second structures with piezoelectricity. Each of the plurality of second structures comprises a second layer with a second carbon-based material and a third layer adjacent to the second layer. The third layer comprises a material of two-dimensional crystals of unconventional stoichiometries such as Na2Cl crystals.

The application discloses a structure vibration self-powered cable force meter based on electrostatic and piezoelectric principles, which comprises a cable force sensor, a wind power energy capturer, a power management module and a sensing signal wireless transmission module. The cable force sensor is installed on a cable and connected with the sensing signal wireless transmission module, and an electric potential difference is generated based on the electrostatic and piezoelectric principles to form an electric current, and the sensing signal wireless transmission module is used to send the sensed signal; the wind power energy capturer is electrically connected with the power management module, and the power management module is electrically connected with the sensing signal wireless transmission module; the wind power energy capturer comprises a support sheet, a blunt body shell, a base, a piezoelectric sheet, a fixed contact plate, a sliding contact plate, a positive friction power generation sheet fixed on the upper surface of the fixed contact plate and a negative friction power generation sheet fixed on the lower surface of the sliding contact plate, and can supply power for the sensing signal wireless transmission module. The device does not need external power supply and a large number of wiring, has high durability and high recognition accuracy.

This invention belongs to the field of medical robot technology, specifically relating to a rollable, wrap-around multi-point force sensing film, an actuator arm, and a force sensing method. The invention comprises, from bottom to top, a lower highly elastic base membrane, a distributed heterogeneous lower electrode layer, a PVDF piezoelectric film, a distributed heterogeneous upper electrode layer, and the lower highly elastic base membrane, stacked sequentially. The PVDF piezoelectric film includes a dense sensing segment at the distal end, a uniformly distributed segment in the middle, and a sparse sensing segment at the proximal end. In use, it is rolled up along its length as a rolling axis to form a rollable, wrap-around multi-point force sensing film. This invention, by directly using a flexible film integrating distributed PVDF piezoelectric units as electronic skin to wrap the sidewall of a catheter, not only significantly improves spatial sensing efficiency but also achieves an optimal balance between sensing accuracy and sensing range with a limited number of sensing units, enabling the flexible surgical actuator arm to possess gradient tactile sensing capabilities similar to biological nerves.

The present application belongs to the technical field of flexible electronics and sensors, and discloses a probe structure flexible tactile sensor and a preparation method thereof. The sensor comprises a flexible sensing probe and a flexible substrate layer. The flexible sensing probe is a two-segment bending flexible probe structure. The bottom surface of the flexible sensing probe is adhered to the surface of the flexible substrate layer. The top of the flexible sensing probe is provided with a magnetic strip. The flexible substrate layer comprises a planar electrode and a flexible substrate. The planar electrode outputs the electrical signal of the flexible sensing probe to an external circuit. The sensor of the present application converts the approach of a touched, vibrated or magnetically conductive object into the deformation of the flexible sensing probe through the flexible probe structure and the magnetic strip, and outputs an electrical signal. The sensor of the present application can work in both contact and non-contact modes, has the characteristics of multifunction, low cost, easy preparation and wearability, and can meet the actual needs of tactile recognition and non-contact sensing.

A double-vibration-beam differential metal-based two-stage amplification quartz resonant pressure sensor and an assembling method thereof relate to the technical field of micro-mechanical electronic (MEMS) pressure measurement, and comprise a pressure sensor shell, a top cover plate of the pressure sensor shell forms a sensitive chamber, a bottom cover plate and the pressure sensor shell form a PCB mounting chamber, a PCB board is fixed in the PCB mounting chamber, a metal-based two-stage amplification pressure sensitive structure element is connected to a side surface of the pressure sensor shell, the metal-based two-stage amplification pressure sensitive structure element is connected to two quartz double-end fixed support tuning forks, and a temperature sensor is connected to a surface of the metal-based two-stage amplification pressure sensitive structure element; the metal-based two-stage amplification pressure sensitive structure element senses and amplifies a pressure signal change and transmits the pressure signal change to the two quartz double-end fixed support tuning forks to obtain a differential frequency output; and the application improves measurement precision and long-term stability.

An artificial nociceptor may include a sensor configured to convert a damaging force into electric energy, a conversion circuit configured to generate an input voltage having a form of a cycle signal having a frequency and amplitude changed, based on the electric energy, and a storage circuit including a plurality of memory cells and configured to provide the input voltage to first memory cells included in a selected area, among the plurality of memory cells.

The application relates to the technical field of semiconductor devices, in particular to a self-powered solid non-contact avoidance sensor based on a liquid TVNG, which solves the technical problems of serious mechanical wear, complicated wiring and non-contact monitoring insensitivity of a fine gap of a contact type limit switch or a pressure-sensitive film installed at the front end of a mechanical arm, and comprises a gold electrode layer, a semiconductor layer and a metal moving electrode, the gold electrode layer is plated on the bottom surface of the semiconductor layer, the top surface of the semiconductor layer is fixedly connected with a hemispherical flexible packaging cover body, the metal moving electrode is fixedly connected to the inner top of the flexible packaging cover body, a certain gap is kept between the metal moving electrode and the top surface of the semiconductor layer, and interface liquid is filled in the gap. The sensor adds the interface liquid with a thickness of mm between the metal moving electrode and the semiconductor layer, an instantaneous signal is generated when the interface liquid slides relative to the semiconductor layer, and mm-level rapid sensing feedback with high sensitivity is successfully realized.

This invention provides a method for preparing an AlScN piezoelectric coating material with high mechanical properties and high temperature resistance. The method includes: using an alloy target composed of Al and Sc, forming an AlScN piezoelectric functional layer on a substrate surface via magnetron sputtering; and controlling the volume ratio of argon to nitrogen, temperature, sputtering power, deposition pressure, and target-substrate distance during magnetron sputtering to allow the AlScN piezoelectric functional layer to grow in multiple orientations during deposition. The AlScN piezoelectric coating material obtained by this invention exhibits excellent mechanical properties, temperature resistance, and corrosion resistance. When deposited on a substrate, this coating material can simultaneously generate longitudinal waves, longitudinal and transverse waves, and transverse waves to achieve defect detection and stress measurement in steel plates, welds, and steel pipes in various media. Furthermore, it exhibits long-term stable service capability under high temperature and harsh operating conditions without the need for a protective layer, meeting long-term usage requirements, facilitating mass production, and possessing promising prospects for promotion and application.

An apparatus for laser treatment, which may provide precise laser treatment in a body, the apparatus for laser treatment including: a light irradiation unit including an optical fiber; a catheter having an expansion fixing portion into which the optical fiber is inserted; a sensor monitoring unit including a plurality of sensors provided in the catheter; and a controller receiving measurement information from the sensor monitoring unit and controlling the light source Furthermore, the plurality of sensors include a shape information sensor inserted together with the optical fiber and configured to obtain internal shape information of the tubular tissue in a position of an optical fiber end to which light is irradiated, and in a cross-section, perpendicular to a longitudinal direction of the catheter, the shape information sensor is disposed in a central portion, together with the optical fiber.