35 results about "Resistive sensors" patented technology

The application discloses a kind of based on transparent soil and pile-soil interface micro evolution measurement method of multi-source sensing, it is related to geotechnical engineering test field.The present application includes the following steps: constructing transparent soil model, pile body pre-embedded sensor arrangement, multi-source sensor calibration and parameter optimization, load application and multi-source data acquisition, improved DIC algorithm's pile-soil interface micro displacement calculation, pile-soil interface pore and particle density calculation, multi-source sensing data's heterogeneous fusion, pile-soil interface micro evolution characteristic quantitative inversion and visualization, test end and data verification.The present application simulates real soil environment by constructing transparent soil model, in combination with image recognition, digital image correlation, fiber-optic sensing and resistance sensor and other multi-source sensing technology, the micro deformation, stress distribution and failure evolution process of pile-soil interface in loading process are monitored and analyzed in real time with high precision, realize the high-precision, full-process, visual measurement of pile-soil interface micro evolution, improve measurement precision.

The invention belongs to the technical field of flexible sensing, and particularly relates to a tensile transparent resistive sensor and a preparation method thereof. The sensor is composed of an elastic substrate and gradient conductive layers, the conductive layers I and II are metal nanowire grids, the conductive layer III is a PEDOT: PSS / metal nanowire composite layer, the three layers form a gradient conductive network on the rigid substrate through a layer-by-layer coating process, and then the gradient conductive network is integrally transferred to the surface of the elastic substrate through a freezing auxiliary transfer printing technology. And forming an interlayer interpenetrating stretchable transparent conductive structure. After the structure is circularly stretched for 100 times under 50% strain, the resistance change rate is less than or equal to 7%, the light transmittance at 550 nm is more than or equal to 85%, the sheet resistance is as low as 16 omega / sq, and the structure has high sensitivity (the detection limit is less than or equal to 5% strain), high light transmittance and excellent cycle stability. The preparation method adopts an all-solution process, is low in cost, can realize large-area preparation, and is suitable for the fields of wearable electronics, health monitoring, human-computer interaction and the like.

According to an embodiment, a biasing circuit includes a high impedance bias stage coupled to sensor pads connected to a resistive sensor for detecting fly height in a hard disk drive. The circuit employs dual operational transconductance amplifiers with different bandwidths working in conjunction with switching circuitry to establish and maintain bias conditions. A first operational transconductance amplifier with a higher bandwidth provides fast initial settling, while a second operational transconductance amplifier with a lower bandwidth optimizes continuous operation. The architecture supports multiple operating modes, including differential voltage, differential current, and common mode configurations, through various arrangements of transistors, compensation capacitors, and feedback paths.

Devices, systems, and methods for assessing contact between a treatment element and an area of target tissue using resistive-type and / or capacitive-type contact sensing elements. In one embodiment, a medical system for determining tissue contact includes an elongate body including a distal portion and a proximal portion and a treatment element coupled to the elongate body distal portion. The treatment element may have a first expandable element, a second expandable element, the first expandable element being within the second expandable element, and at least one contact sensing element between the first and second expandable elements. In one example, the device may include a plurality of contact sensing elements arranged in a matrix or in a plurality of linear configurations. In another example, the device may include a layer of conductive microparticles or a contact-sensing film.

The invention discloses a resistance-type sensing array signal acquisition system with a unit electrode sharing characteristic. The system comprises a resistance-type sensing array with the unit electrode sharing characteristic, an automatic point-by-point switch gating circuit, an excitation end circuit and a signal end circuit. Through the design of double groups of row and column scanning wires and the zero potential isolation circuit, current crosstalk caused by multi-path gating on the same wire of the resistive sensing array with a unit electrode sharing characteristic and adjacent resistor units among different wires is avoided, so that automatic point-by-point scanning of the sensing array can be realized; no external microprocessor or other control is needed, the integration level is high, the unit scanning rate is high, and power consumption is low.

The application relates to a sensing thermal type gas flow sensor MEMS chip end, a heating wire is located at a center symmetrical position of a heat insulation bridge; an adiabatic cavity is arranged at the bottom of the heat insulation bridge, the adiabatic cavity is connected with the heat insulation bridge at two ends in the vertical direction along the arrangement direction of the heating wire; the outside of the adiabatic cavity is a substrate; first and second temperature sensitive resistance type sensors are connected in series to form a half-arm Wheatstone bridge and are located at equidistant positions of two ends of the heating wire and on the heat insulation bridge; first and second BJT bipolar transistors are combined on the substrate on two sides of the adiabatic cavity along the arrangement direction of the central heating wire; and the distances from the heating wires are equal, they respectively include a first BJT transistor and a second BJT transistor and respectively include a third BJT transistor and a fourth BJT transistor. The disclosure uses a mathematical principle to convert a quadratic curve with constant curvature characteristics into a cubic curve with a curvature passing through 0 point characteristics to complete compensation. In the range of the scale, the curve is approximately a straight line.

The present invention provides a resistometric sensor for measuring environmental corrosivity and / or corrosion loss of a metal structure, the said sensor comprising a substrate (1), at least one metal sensing track (5; 5a, 5b) provided on the substrate (1), at least one metal reference track (4) provided on the substrate (1), and a masking layer (3) covering the at least one reference track (4), wherein the substrate (1) is made of a thermally conductive material, and wherein an electrically non-conductive insulating layer (2) is provided between the substrate (1) and the at least one metal sensing track (5; 5a, 5b) and between the substrate (1) and the at least one reference track (4) to electrically insulate the tracks (4, 5; 4, 5a, 5b) from the substrate (1). A method of measuring the environmental corrosivity and / or corrosion loss is also claimed.

The invention relates to the technical field of sensing circuits, and provides a high-performance front-end instrumentation amplifier circuit and a resistive sensing circuit, the high-performance front-end instrumentation amplifier circuit comprises a differential amplifier, a chopping modulation circuit, a ripple reduction loop and a pre-charging loop; the input end of the differential amplifier is connected to the resistive sensor, and the differential amplifier amplifies the input signal; the chopping modulation circuit is connected to the input end and the output end of the differential amplifier and is used for modulating and demodulating the input signal and the output signal; the ripple reduction loop is bridged between the chopping modulation circuit and the input end of the differential amplifier and is used for reducing output ripples caused by chopping modulation; and the pre-charging loop is bridged at the input end of the differential amplifier and is used for improving the input impedance. According to the technical scheme, flicker noise and direct current offset are effectively reduced, the influence of output ripples brought by chopping modulation is reduced, input impedance is improved, and completeness and effectiveness of signal acquisition are guaranteed.

We provide a construction verification device for ground improvement structures that allows for real-time confirmation of the improved structure. [Solution] This is a construction confirmation device 1 for a ground improvement body 7, which creates a ground improvement body 7 by high-pressure injection of a solidifying agent 4 from an injection pipe 3 inserted into the ground 2 around the injection pipe 3, and mixing the high-pressure injected solidifying agent 4 with the ground 2 to form an improved material 6. An inner pipe 9 is buried at a predetermined position away from the injection pipe 3, and multiple detection units 15 of an electrical resistance type sensor 11 for detecting the improved material 6 are provided in the inner pipe 9 at intervals along the length of the inner pipe 9. When the improved material 6 comes into contact with a detection unit 15, the electrical resistance value changes, and this change in electrical resistance value allows detection that the improved material 6 has reached a predetermined position away from the injection pipe 3. Furthermore, the height of the detection unit 15 that the improved material 6 has reached can be detected in real time by the multiple detection units 15.

A low-noise room-temperature resistance NO2 sensor based on MoBT x / ZnO composite material and a preparation method thereof belong to the technical field of gas sensors. The sensor is composed of a polyimide substrate with a gold-nickel double-layer composite interdigital electrode and a MoBT x / ZnO composite material sensitive electrode prepared on the interdigital electrode and the substrate. The MoBT x MBene material is used as a matrix, two-dimensional ZnO is in-situ grown on the MoBT x sheet layer surface through a hydrothermal reaction, the MoBT x sheet layer is closely adhered to the ZnO sheet layer in a large area and forms a lattice coupling, thereby constructing a two-dimensional heterostructure which is continuous, penetrative and has rich edge active sites. The structure can increase the effective heterojunction interface area, enhance the interface modulation effect and significantly enhance the dissipation of disturbance energy. The structure is used as a sensitive material, thereby preparing a high-performance gas sensor. Experiments show that the sensor based on MoBT x / ZnO can inhibit the sensor noise from the root, has high selectivity, high response and low detection limit for NO2 at room temperature.

A kind of three-wire resistance measurement circuit and method based on double current source belong to resistance sensor measurement technical field.The present application is to solve the problem that existing three-wire measurement scheme cannot completely eliminate the influence of lead resistance and its temperature drift.The circuit of the present application includes a first current source, a second current source, a first measurement point, a second measurement point, a resistance temperature detector (RTD) and a measurement circuit. The first current source generates adjustable current and is connected to the first lead, the second current source generates adjustable current and is connected to the second lead, one end of the RTD is connected to the two current sources through the first and second leads respectively, and the other end is grounded through the third lead. The present application completely eliminates the influence of lead resistance and its temperature drift on measurement accuracy through double current source excitation and specific calculation, while retaining the advantage of simple three-wire connection, suitable for high-precision temperature monitoring.

Temperature sensor (40) for a battery cell (10) of a rechargeable battery, comprising: a resistive sensor element (46), a first electrode (42) and a second electrode (44); wherein the resistive sensor element (46), the first electrode (42) and the second electrode (44) are attached to a porous separator (20); wherein the porous separator (20) is arranged between an anode (12) and a cathode (14) of the battery cell (10); wherein the resistive sensor element (46) is electrically connected in series between the first electrode (42) and the second electrode (44); wherein the resistive sensor element (46), the first electrode (42) and the second electrode (44) are attached to the separator (20) by physical vapor deposition; and wherein the resistive sensor element (46), the first electrode (42) and the second electrode (44) are porous.

The application discloses a kind of multi-step measurement method and test circuit of resistive sensor array, and the application is aimed at M×N two-dimensional resistive sensor array of common row line and column line;The test circuit includes: 1 inverting operational amplifier, 1 voltage follower, several row multiplexers, several column multiplexers.Resistive sensor array row line and column line can be accessed the output end of voltage follower by multiplexer, and the inverting input end of voltage follower can also be accessed the row line and column line of resistive sensor array by multiplexer.At the same time, resistive sensor array row line and column line can also be accessed the inverting input end of inverting operational amplifier by multiplexer, and the noninverting input end of inverting operational amplifier is grounded.Compared with prior art, the application can accurately measure the resistance value of any to-be-measured resistor in the array, and effectively eliminates the interference of crosstalk and switch-on resistance, while having strong anti-interference performance and simple structure.

The application relates to a transmitter, which comprises a corrugated base, a mounting groove is formed in the corrugated base, the mounting groove extends from one side of the corrugated base to the other side of the corrugated base, a joint is arranged in the corrugated base, a flow guide channel is arranged in the joint, the flow guide channel is communicated with the mounting groove, a strain resistance sensor comprises a sensor body, the sensor body is located at one end of the mounting groove away from the joint, a medium diaphragm is located at the communication position of the flow guide channel and the mounting groove, and the medium diaphragm is used for separating the flow guide channel and the mounting groove; a to-be-measured liquid passes through the joint, extrudes the medium diaphragm, the medium diaphragm transmits the pressure to the sensor body through the medium in a sealing cavity, and then the pressure value is measured; the medium is located between the medium diaphragm and the sensor body, the medium plays a heat insulation role, the "zero drift" phenomenon is relieved, and the application is suitable for a uranium enrichment engineering production line.

A clothes dryer and a drying control method therefor. The clothes dryer comprises a cabinet (20), a drum (30), an electric motor (32), a compressor (71), a fan (60), a resistive sensor (41), a capacitive sensor (42), and a processor (50), wherein the processor (50) is configured to execute a first drying task, which is configured to control the compressor (71) to operate at a first frequency, the fan (60) to operate, and the electric motor (32) to operate; when executing the first drying task, the processor (50) is further configured to control the duration of the running of the first drying task; the processor (50) is configured to execute a second drying task when a humidity value is less than a first threshold and the moisture content of the air is less than a second threshold, the second drying task being configured to control the compressor (71) to operate at a second frequency, the fan (60) to operate, and the electric motor (32) to operate continuously; and when executing the second drying task, the processor (50) is further configured to control the duration of the running of the second drying task.

The application discloses a kind of measurement method and system for improving the precision of differential resistance sensor, comprising: control constant current flows through reference resistance R S , differential resistance sensor resistance R1 and differential resistance sensor resistance R2;The voltage generated on reference resistance R S , differential resistance sensor resistance R1 and differential resistance sensor resistance R2 is introduced into instrument amplifier, and AD code value AD S , AD code value AD1 and AD code value AD2 are obtained using ADC converter;Using AD code value AD S , AD code value AD1 and AD code value AD2 calculate measurement parameter Z′;The measurement parameter Z′ is the difference between differential resistance sensor resistance R1 and differential resistance sensor resistance R2 is the sum of differential resistance sensor resistance R1 and differential resistance sensor resistance R2;Without changing the structure of existing differential resistance sensor, the sensitivity of the sensor is improved, and the linearity of the sensor is improved.

The utility model discloses an automatic concrete bleeding rate measuring device, and relates to the technical field of concrete detection, a measuring cylinder is arranged on a vibrating table, a cylinder cover is arranged at the top of the measuring cylinder, a glass window is arranged on one side of the measuring cylinder, a camera is arranged on one side of the glass window, and the camera is connected to the cylinder cover through a fixing rod. A water pumping mechanism is further arranged on the barrel cover, and the vibrating table, the camera and the water pumping mechanism are all electrically connected with the main controller. According to the device for automatically measuring the bleeding rate of the concrete, the camera is used for shooting and judging whether a bleeding layer exists in the measuring cylinder or not so as to judge whether water needs to be pumped, meanwhile, the resistive sensor is used for accurately controlling the bottom end of the water conveying hard pipe to only make contact with the water surface, and therefore it is guaranteed that bleeding rather than cement in the concrete is pumped; accurate measurement results are guaranteed, measurement operation is automatic, tedious manual operation is avoided, and influences of human factors are reduced.

This invention relates to the field of power equipment condition monitoring and intelligent diagnosis technology, specifically to a transformer fault location method and system based on a palladium thin-film hydrogen sensor array. The system deploys a palladium thin-film resistive hydrogen sensor array at multiple key locations in the transformer tank to collect real-time dynamic changes in hydrogen concentration in the oil. A virtual transformer fault dataset generated from a digital twin model of the transformer's operating state is used for training using artificial intelligence algorithms. The trained model can intelligently analyze and match features from sensor signals collected during actual operation, thereby achieving rapid identification and spatial location of internal transformer faults. This invention, by integrating the high sensitivity of palladium thin-film resistive sensors, the simulation capabilities of a digital twin system, and the data-driven characteristics of artificial intelligence algorithms, achieves early warning, fuzzy location, and intelligent diagnosis of transformer faults, offering advantages such as fast response, high accuracy, and strong scalability.

The invention belongs to the technical field of ignition driving circuits, and particularly relates to an analog interface circuit compatible with a resistive sensor and a Hall sensor. The circuit comprises an interface circuit and a current sampling circuit, the interface circuit is connected with the current sampling circuit; the interface circuit is also connected with an external element through an AIN interface; when the external element is a resistive sensor, the analog interface circuit works in a fixed current mode, and an ADC is adopted to carry out voltage sampling on the AIN interface to obtain a voltage value of the AIN interface; when the external element is a Hall sensor, the analog interface circuit works in a Hall mode, and a current sampling circuit is adopted to carry out current sampling on the AIN interface to obtain a current value of the AIN interface; the state of the external element can be detected to assist in judging whether ignition driving is carried out or not, so that it is ensured that ignition driving is carried out under the more accurate and safer condition, and good application prospects are achieved.

Hybrid sensor (HYB) comprising: a piezoelectric strain gauge (PIEZO); a resistive strain gauge (RES); and an electronic module (EL.MOD), the piezoelectric strain gauge and the resistive strain gauge being connected in parallel to terminals (T1RES, T2RES, T1PIEZO, T2PIEZO) of the electronic module, the hybrid sensor being configured so that the piezoelectric strain gauge and the resistive strain gauge generate a piezoelectric signal and a resistive signal, respectively, in response to a deformation of an object instrumented by the hybrid sensor (HYB), and the electronic module being configured to combine a first signal from the resistive signal and a second signal from the piezoelectric signal, so as to generate a first output signal that is representative of the deformation of the instrumented object. Figure to be published with the abbreviation: Fig. 1

The application discloses a universal pressure measurement system for a flexible resistive array sensor, comprising a universal adapter, a special measurement host; the application also discloses a pressure measurement method using the universal pressure measurement system, comprising the following steps: (1) connecting a flexible resistive sensor array to be measured with a special measurement host through an interface of a universal adapter; (2) placing the flexible resistive sensor array to be measured on the surface of an object to be measured and applying a pressure to be measured; (3) applying an excitation to the flexible resistive sensor array through the universal adapter by the special measurement host and measuring the resistance response of each sensing unit of the flexible resistive sensor array; (4) converting the measured resistance response into two-dimensional pressure distribution information by the special measurement host; and (5) outputting and displaying the two-dimensional pressure distribution information. The application solves the problems of unreliable connection, low measurement efficiency and non-intuitive data processing of the existing measurement mode.

The utility model discloses a high-precision electronic scale alarm system based on a resistive sensor. Comprising a core control module, a sensor module, an analog-to-digital conversion module, a display module, a key module, an alarm module and a power supply module. The sensor module comprises an HL-8 type weighing sensor and a second bearing platform. The bearing platform comprises an upper bearing plate, an upper gasket, a lower bearing plate, a lower gasket and screws. The left side of the top of the HL-8 type weighing sensor is connected with the bottom of the upper bearing plate through the upper gasket and the screw, and the right side of the bottom of the HL-8 type weighing sensor is connected with the top of the lower bearing plate through the lower gasket and the screw, so that an upper suspension distance and a lower suspension distance are formed through the gaskets. The electronic scale alarm system improves the weight measurement precision and stability, has an overload alarm prompt function, and can be suitable for a scene in which the weight of a weighed object needs to be continuously monitored.

A magnetic field sensing device is provided. The magnetic field sensing device includes a magneto-resistive sensor, a Hall sensor, and an operation circuit. The magneto-resistive sensor senses a magnetic field to provide a magneto-resistive sensing value. The Hall sensor senses the magnetic field to provide a Hall sensing value. The operation circuit provides a weight value according to the magneto-resistive sensing value, and generates a first operation value according to the weight value and the Hall sensing value, and generates a second operation value according to the weight value and the magneto-resistive sensing value. The operation circuit operates the first operation value, the second operation value, and the magneto-resistive sensing value to generate an output signal having an output value. The output value is related to a strength of the magnetic field.

The invention relates to an apparatus (100) for determining a resistance value of one (102) of a plurality of resistive sensors based on a measure of a current responsive to a bias voltage (107) applied to said one resistive sensor (102), the apparatus (100) comprising: a bias voltage generator (101) for applying a bias voltage (107) to said one resistive sensor (102); a bias voltage controller (103) coupled with said bias voltage generator (101) and configured for adjusting said bias voltage (107) based on a sensing current (108, 109) flowing through said one resistive sensor (102); a current measurement unit (104) configured for measuring a sensing current (108, 112) flowing through said one resistive sensor (102) once said bias voltage (107) has been adjusted; a sensor selection unit (105) coupled with the bias voltage controller (103) and the current measurement unit (104), and configured for selecting a resistive sensor (102) in the plurality of resistive sensors.

The invention relates to an apparatus (100) for determining a resistance value of one (102) of a plurality of resistive sensors based on a measure of a current responsive to a bias voltage (107) applied to said one resistive sensor (102), the apparatus (100) comprising: a bias voltage generator (101) for applying a bias voltage (107) to said one resistive sensor (102); a bias voltage controller (103) coupled with said bias voltage generator (101) and configured for adjusting said bias voltage (107) based on a sensing current (108, 109) flowing through said one resistive sensor (102); a current measurement unit (104) configured for measuring a sensing current (108, 112) flowing through said one resistive sensor (102) once said bias voltage (107) has been adjusted; a sensor selection unit (105) coupled with the bias voltage controller (103) and the current measurement unit (104), and configured for selecting a resistive sensor (102) in the plurality of resistive sensors.

A process for determining the viability of a biological indicator includes exposing the biological indicator to a viability detection medium, the biological indicator including test microorganisms, the exposing the biological indicator to the viability detection medium producing a gaseous reaction product when one or more of the test microorganisms are viable. The presence or absence of the gaseous reaction product produced by the biological indicator combined with the viability detection medium is detected with a sensing device, the sensing device comprising a capacitive sensor, an electro-mechanical sensor, or a resistive sensor, wherein the presence of the gaseous reaction product indicates the presence of viable test microorganisms and the absence of the gaseous reaction product indicates the absence of viable test microorganisms. A sterilization detection device includes a container configured to contain the biological indicator, a viability detection medium, and the sensing device.

An integrated blower sensor unit is proposed that provides air temperature sensing and air flow (or mass) sensing for external Fan speed and ON / OFF control to offer sustained optimized computing power for AI laptop. The air temperature sensor can be either resistive-type sensor or thermopile sensor. The air flow sensor consists of two resistive-type sensor elements plus one resistive heater element that co-located on a Membrane made of MEMS process with cavity underneath. A signal processing element is also provided that performs amplification, analog to digital conversion, storage of calibration parameters, sequence control of sensor readout and calculation of calibrated readout data through a serial communication interface. The integrated blower sensor unit is mounted in the in-flow air way of a blower for the AI laptop.

The invention discloses an energy pile simulation model experimental device and experimental method under underground water level change. The experimental device comprises a loading and foundation structure module, a sensor monitoring module, a working condition setting module and a data analysis module. The experimental method comprises the steps that soil is taken from an energy pile field test area, the dry density and the moisture content are controlled to be consistent with the field in-situ condition, an energy pile model pile is arranged in a model groove, and corresponding optical fiber temperature, displacement, strain and soil pressure sensors are arranged in the pile body, the pile top and soil around the model pile; through field actual measurement data, underground water level change conditions are simulated, working conditions such as temperature, water level and rainfall are set, and energy pile multi-physics field parameters are monitored; the data of each sensor is read through an OFDR data acquisition instrument, and a traditional resistance-type sensor is adopted for comparison and verification at the same time. According to the invention, the real simulation of the energy pile under the change of the underground water level is realized, and the research problem of the multi-physics field temporal and spatial change characteristics of the energy pile under different working conditions is solved.

An apparatus is provided for enabling smokable material to be heated to volatize at least one component of the smokable material. In one example, the apparatus has a capacitive sensor arranged to sense a change in capacitance when an article of smokable material is associated with a housing of the apparatus in use. In another example, the apparatus has a resistive sensor arranged to provide a measure of electrical resistance when an article of smokable material is associated with a housing of the apparatus in use. A combination of capacitive and resistive sensing may be used in some examples. In another example, a sensor makes use of at least two different sensing techniques.