123 results about "Resonant sensor" patented technology

The invention relates to the technical field of hydraulic engineering safety monitoring, and particularly discloses a hydraulic engineering dam safety monitoring and early warning method and system, which realize comprehensive perception and accurate early warning of the health state of a dam structure through a composite sensing technology and an intelligent analysis algorithm. A micro-mechanical resonance sensor and a distributed optical fiber sensor are cooperatively deployed, and an interface and structure integrated three-dimensional monitoring network is constructed; a three-dimensional interface stripping characteristic spectrum is constructed based on a time-frequency conjoint analysis technology, and the bonding degradation state between the sensor and the dam body is accurately identified; a strain field anomaly distribution matrix is established through spatial correlation modeling, precise positioning of internal damage is realized, a dual-channel feature fusion network and a deep neural network evaluator based on an attention mechanism are designed, and multi-dimensional correlation analysis is performed on an interface state and structural damage features; and finally, realizing progressive response from data verification and multi-source verification to emergency linkage through a three-level linkage early warning decision tree.

Resonant sensors for environmental health risk detection are disclosed. A mechanical member may include at least one meso-scale or micro-scale resonator disposed on a surface of the mechanical member. Additionally, the at least one meso-scale or micro-scale resonator may include a plurality of first carbon particles configured to uniquely resonate in response to an electromagnetic ping based at least in part on a concentration level of the first carbon particles within the at least one meso-scale or micro-scale resonator. Further, the at least one meso-scale or micro-scale resonator may be configured to resonate at a first frequency in response to the electromagnetic ping when the mechanical member is in a first state, and may be configured to resonate at a second frequency in response to the electromagnetic ping when the mechanical member is in a second state.

A disclosed leaky coaxial resonant sensor system and methods. In use, the system includes at least one split-ring resonator (SRR) embedded within a material of the component. The at least one SRR is formed from a composite material. Additionally, the at least one SRR is configured to resonate at a first frequency in response to an interrogation signal from a leaky coaxial cable antenna. In some aspects, each SRR may resonate at a first frequency in response to an electromagnetic ping when the composite material is in a first state, and may resonate at a second frequency in response to the electromagnetic ping when the composite material is in a second state. A resonant frequency of the composite material may be based on physical characteristics of the composite material.

Resonant sensors for environmental health risk detection are disclosed. A mechanical member may include at least one meso-scale or micro-scale resonator disposed on a surface of the mechanical member. Additionally, the at least one meso-scale or micro-scale resonator may include a plurality of first carbon particles configured to uniquely resonate in response to an electromagnetic ping based at least in part on a concentration level of the first carbon particles within the at least one meso-scale or micro-scale resonator. Further, the at least one meso-scale or micro-scale resonator may be configured to resonate at a first frequency in response to the electromagnetic ping when the mechanical member is in a first state, and may be configured to resonate at a second frequency in response to the electromagnetic ping when the mechanical member is in a second state.

The invention provides a wireless passive surface acoustic wave temperature, humidity and pressure sensor and a preparation method thereof, and belongs to the field of surveying and mapping devices. The interdigital transducer is arranged in the middle of the three areas; each pair of reflecting gratings is arranged on the two sides of the interdigital transducer; the resonant frequency of the resonant acoustic wave sensors is adjusted by adjusting the interdigital period of each interdigital transducer and the period of the reflecting grating, and the three resonant acoustic wave sensors are made to detect the surface temperature, the surface humidity and the surface pressure respectively; and the coating is coated on the surface of the area for detecting the surface humidity. Different structural designs are selected based on the surface acoustic wave principle, the resonant frequency of the resonant sensor is adjusted by changing the interdigital period of the interdigital transducer and the period of the reflecting grating, and multi-parameter detection of temperature, humidity and pressure is achieved on the same substrate.

A system may include an array of sensor elements, the array of sensor elements each comprising a first type of passive reactive element, a second type of passive reactive element electrically coupled to the array of sensor elements, a driver configured to drive the array of sensor elements and the second type of passive reactive element, and control circuitry configured to control enabling and disabling of individual sensor elements of the array of sensor elements to ensure no more than one of the array of sensor elements is enabled at a time such that when one of the array of sensor elements is enabled, the one of the array of sensor elements and the second type of passive reactive element together operate as a resonant sensor.

The invention provides a piezoelectric resonant sensor and a preparation method thereof, and relates to the technical field of sensors and sensor manufacturing. The piezoelectric resonant sensor comprises a substrate and a piezoelectric component. Wherein the substrate is provided with a first side and a second side which are opposite to each other, and an input cavity is formed in the second side; the piezoelectric assembly is connected to the first side of the substrate, one side, facing the substrate, of part of the piezoelectric assembly protrudes in the direction away from the substrate and is matched with the substrate to form a resonant cavity, and the resonant cavity is at least partially opposite to the input cavity. A pressure sensitive film is formed on the part, opposite to the input cavity, of the substrate, and the input cavity is used for receiving to-be-detected pressure and transmitting the to-be-detected pressure to the pressure sensitive film, so that the pressure sensitive film drives the piezoelectric assembly to deform through the cavity wall of the resonant cavity. Therefore, a resonant cavity is naturally formed between the piezoelectric component and the substrate, and an additional middle layer can be avoided, so that the size of the piezoelectric resonant sensor can be reduced, the cost is reduced, and large-scale production is facilitated.

A wireless passive resonance sensor and contact lens for intraocular pressure monitoring comprises a contact lens body which is used for packaging a sensor assembly and serves as a substrate of the sensor. The first spiral inductor is arranged in the contact lens body; the middle elastic dielectric layer covers the first spiral inductor and is used for forming a deformable dielectric medium; the second spiral inductor is arranged on the middle-layer elastic dielectric layer, is opposite to the first spiral inductor and forms an inductor assembly with the first spiral inductor; wherein the first spiral inductor, the middle elastic dielectric layer and the second spiral inductor jointly form a capacitor and equivalently form a serial L-C-L resonant circuit, and the change of intraocular pressure is responded through the change of resonant frequency of the resonant circuit, so that passive wireless monitoring is realized. The design optimizes the preparation process, reduces the cost, improves the signal stability, is suitable for 24-hour continuous monitoring, and provides a powerful tool for early diagnosis and intervention of glaucoma.

The invention belongs to the technical field of MEMS resonance sensors, and particularly relates to a real-time liquid flow rate monitoring sensor and method based on an MEMS plane resonance technology. Wherein the fan-shaped sensing plate is an arc plate, a central supporting beam is arranged at the rear end of the middle part of a small arc-shaped edge of the fan-shaped sensing plate, an electrothermal resonance excitation thin beam and a piezoresistive frequency reading thin beam are arranged on the left side and the right side of the fan-shaped sensing plate, and an electrothermal excitation resistor is embedded in the electrothermal resonance excitation thin beam; a piezoresistor is embedded in the piezoresistive frequency reading thin beam; according to the invention, the MEMS resonance technology is applied to the micro flow channel, and the high-precision measurement of the flow velocity of the fluid is realized through the frequency deviation characteristic of the torsional mode resonance generated by electromagnetic excitation under the action of the fluid.

The present invention discloses an intelligent multi-parameter oil quality monitoring device, comprising: a housing with a detection end and an output end at both ends, a resonant cavity and a detection cavity are arranged inside the housing, a particle detection channel and an oil port are provided on the housing; a monitoring component, including a sensing circuit module, a tuning fork resonance sensor, a temperature sensor and a microfluidic chip, the tuning fork resonance sensor includes a quartz tuning fork, the microfluidic chip includes a capacitor, and the capacitor includes electrode plates. This intelligent multi-parameter oil quality monitoring device integrates the temperature sensor, the tuning fork resonance sensor and the microfluidic chip inside the housing. By installing the housing on the oil pipe, multiple parameters such as the viscosity, dielectric constant, temperature, abrasive particle size, density, etc. in the oil can be monitored simultaneously, so as to accurately judge the oil quality, avoid false alarms, and perform data transmission through the sensing circuit module, with high integration, small volume and strong anti-interference ability.

A method for non-invasively identifying a location of a mass or tumor including: providing a patient with a possible mass or tumor; providing a detector including one or more resonant sensors, each sensor including at least one loop resonator, at least one cavity resonator, or at least one waveguide resonator; detecting resonant frequencies at different locations on the patient's skin near locations of the mass or possible tumor; and locating the mass or tumor by noting a location of an atypical resonant frequency.

The embodiment of the invention provides a substance measuring device and a substance measuring method, the substance measuring device comprises a pressure difference forming pipe, and the apertures of at least two positions in the pressure difference forming pipe are different; the pressure sensor is arranged at the upstream of the pressure difference forming pipe and is used for detecting pressure data in the pressure difference forming pipe; the temperature sensor is arranged on the pressure difference forming pipe and is used for detecting temperature data of a multiphase object to be detected; the microwave resonance sensor is connected with the pressure difference forming pipe, the microwave resonance sensor comprises a channel, and the channel is communicated with the pressure difference forming pipe and used for collecting resonance data caused by the multiphase matter to be measured; and the pressure difference sensor is arranged on the pressure difference forming pipe and is used for detecting the pressure difference of at least two positions of the pressure difference forming pipe.

The invention provides a dual-mode resonant sensor, and relates to the technical field of sensors, and the dual-mode resonant sensor comprises a single resonator, two sides of a resonant beam of the single resonator are provided with a first differential detection electrode pair, a second differential detection electrode pair and a driving electrode pair; the first differential detection electrode pair is symmetrically arranged on two sides of the middle part of the resonant beam and is used for detecting a first-order modal vibration signal of the single resonator; the second differential detection electrode pair is symmetrically arranged at two ends of one side of the resonant beam and is used for detecting a second-order modal vibration signal of the single resonator; the driving electrode pair is arranged at two ends of the other side of the resonant beam and is used for applying an alternating current driving signal to the resonant beam; the closed-loop control circuit is connected with the first differential detection electrode pair through a pair of first input ends and connected with the second differential detection electrode pair through a pair of second input ends, the output end of the closed-loop control circuit is connected with the driving electrode pair, and the closed-loop control circuit is used for feeding back and adjusting the alternating current driving signal according to the first-order modal vibration signal and / or the second-order modal vibration signal. The invention further provides a closed-loop control method.

The utility model relates to a torsion measuring device which comprises a wrench body and a measuring module used for measuring torsion applied to the wrench body. The torque wrench is characterized in that the measuring module is a piezoelectric resonant sensor, the piezoelectric resonant sensor is embedded in the wrench body, and the piezoelectric resonant sensor is configured to be capable of reflecting the change of torque according to the change of oscillation frequency generated by the piezoelectric resonant sensor. The device has the advantages that the piezoelectric resonant sensor serves as a measuring module, a frequency signal generated by the piezoelectric resonant sensor due to the piezoelectric or inverse piezoelectric effect can be directly used as a force sensing signal, the principle is that the oscillation frequency of the piezoelectric resonant sensor changes under the action of external force, and the frequency variation is used as a change value for judging the force of the piezoelectric resonant sensor; a frequency value can be directly detected or converted into a voltage signal, and the piezoelectric resonant sensor has the sensor characteristics of good measurement precision, sensitivity, response time, hysteresis and the like, so that the measurement precision of torsion is improved.

The invention provides a method for generating a PUF characteristic value and a PUF key of a resonant sensor. The method comprises the steps that a resonant sensor is provided, a power source of the resonant sensor is turned on, and the resonant sensor comprises the power source, a driving voltage adjusting circuit and a resonant sensor module; the driving voltage adjusting circuit is used for adjusting the driving voltage input into the resonant sensor module; a plurality of groups of driving voltages are input to the resonant sensor module through the driving voltage adjusting circuit; measuring to obtain the primary vibration amplitude and the secondary vibration amplitude of the resonant sensor module under each group of driving voltage; and taking the multiple groups of driving voltages as excitation, taking the primary vibration amplitude and the secondary vibration amplitude under each group of driving voltages as response, and generating a PUF characteristic value. The PUF characteristic value of the sensor is generated by taking the driving voltage in the resonant sensor as excitation and taking the primary vibration amplitude and the secondary vibration amplitude under different pressures as responses, so that additional design and production cost does not need to be increased, and the PUF cost is reduced.

The application relates to the technical field of water conservancy project safety monitoring, and particularly discloses a water conservancy project dam safety monitoring and early warning method and system, which realizes comprehensive perception and accurate early warning of the health state of a dam structure through composite sensing technology and intelligent analysis algorithms; a three-dimensional monitoring network integrated with interfaces and structures is constructed through the cooperative deployment of micromechanical resonant sensors and distributed optical fiber sensors; a three-dimensional interface peeling characteristic spectrum is constructed based on time-frequency joint analysis technology, and the bonding deterioration state between the sensors and the dam body is accurately identified; a strain field abnormal distribution matrix is established through spatial correlation modeling, accurate positioning of internal damage is realized, a double-channel feature fusion network based on an attention mechanism and a deep neural network evaluator are designed, multi-dimensional correlation analysis of the interface state and structural damage features is carried out, and finally, a three-stage linkage early warning decision tree is used to realize a progressive response from data verification, multi-source verification to emergency linkage.

The invention relates to a pulse width modulation silicon resonant pressure sensor closed-loop circuit and a debugging method, the pulse width modulation silicon resonant pressure sensor closed-loop circuit comprises a resonant sensor, a current and voltage conversion circuit, a comparator circuit, an amplitude control circuit and a pulse width modulation generation circuit, and the comparator circuit converts the amplified frequency signal into a square wave signal, generates a pulse signal through the pulse width modulation generation circuit, and is connected to the driving end of the resonator to generate a driving signal to form a closed-loop system. Wherein the amplitude control circuit is used for detecting the signal amplitude of the sensor and generating a control signal to adjust the impedance of the pulse width modulation generation circuit so as to adjust the pulse width of the driving signal and finally realize the stable closed loop of the sensor. According to the method of the closed-loop circuit based on pulse width modulation, the structure of the closed-loop driving circuit is optimized, the number of components is reduced, the pull-in risk is reduced, and the stability of the closed loop is improved.

A gas sensing system includes a packaged photonic sensor including a resonant sensor and a control system. The control system includes a light module, a receiver module, and a core module. The light module includes a light source to generate light and transmit it to the photonic sensor. The receiver module receives light signals from the photonic sensor and converts them to digital signals. The core module includes a computing device and is programed to: control the light module to cause the light module to generate and transmit light to the packaged photonic sensor, receive the digital signals from the receiver module, and detect one or both of a concentration of a gas that interacted with the resonant sensor and an identification of the gas whose molecules interacted with the resonant sensor based at least in part on the received digital signals from the receiver module.

The invention belongs to the technical field of medical sensing, and relates to a wound monitoring bandage and method based on flexible passive inductance-capacitance resonance sensing. Comprising a contact wound dressing; the sensor assembly comprises a first transparent dressing packaging layer, a second transparent dressing packaging layer and an LC resonance sensor, the first transparent dressing packaging layer and the second transparent dressing packaging layer are arranged in a stacked mode, the LC resonance sensor is packaged between the first transparent dressing packaging layer and the second transparent dressing packaging layer, and the LC resonance sensor is of a planar spiral structure; the second transparent dressing packaging layer is arranged at the top of the contact wound dressing; and the transparent dressing fixing layer covers and fixes the sensor assembly and the contact wound dressing. The problems that in the prior art, wound healing state evaluation depends on subjective experience, continuous real-time monitoring cannot be achieved, the healing environment is prone to being damaged and infection is caused by frequent dressing replacement are solved, and the dual functions of objective, continuous and non-invasive monitoring on the wound healing process and active healing promotion are achieved.

The invention provides a resonant sensor PUF (Physical Unclonable Function) characteristic value generation method and a PUF key generation method. The method comprises the steps that a resonant sensor is provided, a power source of the resonant sensor is turned on, the resonant sensor comprises a power source module, a processor, a temperature adjusting module and a resonant sensor module, and the processor is used for adjusting the temperature of the environment where the resonant sensor module is located through the temperature adjusting module; the ambient temperature of the resonant sensor module is enabled to be a plurality of groups of test temperatures through the temperature adjusting module; measuring to obtain resonance parameters of the resonant sensor module under each group of test temperatures; the PUF characteristic value is generated by taking the multiple groups of test temperatures as excitation and taking the resonance parameters under each group of test temperatures as responses, so that additional design and production cost does not need to be increased, and the PUF cost is reduced.

A resonant sensor is embedded within or applied to a component of a medical diagnostic apparatus. The resonant sensor is formed from a composite material. The resonant sensor undergoes a change of permittivity and / or change in permeability due to metabolic activity of a microorganism that is involved in the medical diagnostic and proximal to the resonant sensor. The medical diagnostic apparatus may be a blood culture bottle that is configured to contain a blood culture medium. The resonant sensor may be embedded in or applied to the exterior or interior wall of the blood culture bottle. The resonant sensor may undergo a change in permittivity and / or a change in permeability due to production of carbon dioxide by the microorganism. The composite material may comprise a carbonaceous material such as graphene.

A scanning probe microscope and microscope operating method utilizes at least one material having a dielectric constant (ε) and a resonant sensor material between a metal probe tip and a sample surface. When electromagnetic radiation from a light source is transmitted to the junction between the metal probe tip and the sample, absorption of the electromagnetic radiation by the resonant sensor material, which depends on the dielectric constant of the at least one material of the sample, is detected.

This application provides a method and apparatus based on a weakly coupled resonant sensor. In executing the method, a disturbance signal is first obtained by converting the measured physical quantity. This disturbance signal is then input into a target sensor, causing the target sensor to generate at least one resonant signal based on the disturbance signal. The target sensor is a multi-degree-of-freedom weakly coupled resonant sensor, which generates at least one resonant signal through modal localization. Finally, a feedback signal is generated and output based on the obtained resonant signal. In this way, the generated feedback signal balances the stiffness disturbance signal acting on the target sensor, and the feedback signal is output as the sensing result. This decouples the sensitivity of the multi-degree-of-freedom weakly coupled resonator in the sensor from the overall measurement range of the sensor. Thus, without affecting the ultra-high sensitivity of the multi-degree-of-freedom weakly coupled resonator, the detection range of the sensor is greatly expanded.

A disclosed component may include at least one split-ring resonator, which may be embedded within a material. The split ring resonator may be formed from a three-dimensional (3D) monolithic carbonaceous growth and may detect an electromagnetic ping emitted from a user device. The split ring resonator may generate an electromagnetic return signal in response to the electromagnetic ping. The electromagnetic return signal may indicate a state of the material in a position proximate to a respective split ring resonator. In some aspects, the split-ring resonator may resonate at a first frequency in response to the electromagnetic ping when the material is in a first state, and may resonate at a second frequency in response to the electromagnetic ping when the material is in a second state. A resonant frequency of the 3D monolithic carbonaceous growth may be based on physical characteristics of the material.

The invention discloses an oil-filled medium isolation packaging type silicon resonance pressure sensor and a preparation method thereof, belongs to the technical field of MEMS pressure sensors, and solves the problem that an existing pressure sensor is liable to have intermittent faults. The device specifically comprises a tube body, a concave cavity is formed in the top of the tube body, and a silicon resonance chip is arranged in the concave cavity; a cap is mounted at the top of the tube body, an isolation diaphragm is arranged between the cap and the tube body, and silicone oil is filled between the isolation diaphragm and the tube body. According to the invention, a measurement medium enters the cap through the filler neck to extrude the isolation diaphragm, the isolation diaphragm generates micro deformation when sensing the pressure of the medium, the pressure is transmitted to the silicon resonance chip through silicone oil in the pipe body, and the silicon resonance chip converts the external pressure into a perceivable analog signal; in the process, an external measuring medium does not directly act on the silicon resonance chip, so that the problem of intermittent fault or complete failure of the silicon resonance sensor in a corrosive gas or liquid environment is avoided.

This application provides a resonant sensor, a battery, a battery pack, and an energy storage system. The resonant sensor includes the first substrate, the second substrate, and the third substrate which are all flexible substrates, the resonant sensor may operate in an environment with a flexible feature requirement.

The invention relates to a radio frequency resonance sensing type fingerstall for quantitative biochemical detection, comprising: a fingerstall assembly comprising a first fingerstall, a second fingerstall, and a connecting part for connecting the first fingerstall and the second fingerstall, the first fingerstall and the second fingerstall being respectively used for sleeving a thumb and an index finger; the quantitative ring cutting device is arranged on the surface of the finger prominence position of the first fingerstall; the radio frequency resonance sensor is arranged on the surface of the finger prominence position of the second fingerstall; the radio-frequency signal acquisition circuit module is arranged at the finger root of the second fingerstall, is electrically connected with the radio-frequency resonance sensor and is configured to be used for transmitting a sweep-frequency radio-frequency excitation signal to the radio-frequency resonance sensor and receiving a reflected signal of the sweep-frequency radio-frequency excitation signal; when the thumb sleeved with the first fingerstall and the index finger sleeved with the second fingerstall stretch into the two sides of the sheet-shaped part of the plant to be detected and are kneaded, a sample with the fixed size is cut from the sheet-shaped part of the plant to be detected through the quantitative ring cutting device, and the cut sample directly makes contact with the surface of the radio frequency resonance sensor; therefore, the resonant frequency of the radio frequency sensor is shifted and / or the reflection coefficient is changed, so that the reflection signal of the radio frequency resonant sensor received by the radio frequency signal acquisition circuit module is changed. Thus, the flexible wearable fingerstall provided by the invention integrates an unmarked, non-modified and direct contact type radio frequency resonance sensor and a quantitative ring cutting device for quantitative sampling, can perform quantitative sampling and real-time detection on solid samples such as plant leaves and the like, and realizes an integrated operation process of'detection once pinching '; and the standardization, portability and field applicability of detection are remarkably improved.

1. The name of the product of this design: clamp. 2. Purpose of the product of this design: used to fix the coaxial resonant sensor, rangefinder and CCD camera components inside the microwave near-field scanning microscope, so as to facilitate equidistant scanning and sample photography of the microwave near-field scanning microscope. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

Examples are disclosed that relate to sensing a position of a surface proximate to a resonant LC sensor. One example provides a method on a sensing device comprising one or more resonant LC sensors each configured to output a signal responsive to a position of a surface proximate to the resonant LC sensor. The method comprises, for each LC sensor, generating an oscillating signal on an antenna of the resonant LC sensor and detecting a near-field response of the resonant LC sensor at a selected frequency.

The instrumented substrate includes a multilayer substrate, a plurality of quartz resonant sensors, and a processor each disposed within the multilayer substrate. The plurality of quartz resonant sensors are configured to oscillate at a frequency that is dependent on parameters of the multilayer substrate in proximity to each sensor and generate a plurality of measurement signals based on the frequency of oscillation of each sensor. The processor is configured to receive the plurality of measurement signals from the plurality of quartz resonant sensors and determine at least one local parameter of the multilayer substrate based on each of the plurality of measurement signals.