636 results about "Capacitance transducer" patented technology

The invention provides an abnormal blood sampling inspection data evaluation processing method and system of a blood sampling system. Wherein the diffusion track dynamic state of an anticoagulant-blood contact surface in a blood sampling tube is tracked in real time, dielectric response waveform distortion characteristics on the two sides are synchronously collected through a capacitance sensor array, and diffusion form parameters are generated; curvature sudden change is analyzed to trigger an acoustic fluid device to modulate audio frequency and flow velocity, and a composite disturbance field is formed; performing capacitance axial scanning on the disturbed mixed fluid, extracting phase angle offset and gradient abrupt change point coordinates, and constructing a dielectric anomaly three-dimensional map; matching a standard dielectric model, positioning a coordinate set of a concentration gradient imbalance area and a coordinate set of an eddy current attenuation area, and generating an anticoagulant abnormal index and a mixed defect matrix in combination with phase angle offset difference; and establishing a data anomaly degree evaluation function based on the anomaly index and the defect matrix, dynamically associating a clinical error threshold, and outputting a test evaluation result. According to the invention, anticoagulant diffusion can be monitored in real time, and the mixing quality error can be accurately evaluated.

The invention discloses a vehicle exterior handle waterproof false triggering system and method based on double-frequency-point charging and discharging resonance, and relates to the technical field of automotive electronics. An electrode array composed of capacitance detection electrodes is arranged on the inner side of a vehicle exterior handle to form a vehicle exterior handle capacitance sensor; in a non-interference environment, high-frequency and low-frequency mutual capacitance reference values are collected, and a compensation parameter library is established by associating outer handle shell parameters of the vehicle; a self-capacitance channel of the electrode array is used for detecting proximity signals, high-frequency and low-frequency mutual capacitance signals are collected, and the high-frequency and low-frequency mutual capacitance signals are preprocessed; calling a compensation parameter library to correct the preprocessed high and low frequency mutual capacitance signal, and calculating the mutual capacitance increment and change slope of the high and low frequency mutual capacitance signal; based on the mutual capacitance increment and the change slope, human body touch and water interference are distinguished by analyzing high-frequency and low-frequency signals.

A system may include a resistive-inductive-capacitive sensor, a driver configured to drive the resistive-inductive-capacitive sensor at a driving frequency, a measurement circuit communicatively coupled to the resistive-inductive-capacitive sensor and configured to measure phase information and amplitude associated with the resistive-inductive-capacitive sensor, and a noise detection circuit communicatively coupled to the measurement circuit and configured to determine a presence of external interference in the system based on at least one of the phase information and the amplitude information.

The invention relates to the technical field of intelligent robots, and discloses an automobile cabin intelligent robot arm device which comprises a multi-axis robot arm, a controller, an in-automobile space sensing device and an intelligent interaction device, and the multi-axis robot arm, the controller, the in-automobile space sensing device and the intelligent interaction device are all installed in an automobile cabin. The robot arm comprises a base rotating motor, an arm motor, a palm motor, a capacitance sensor, a pressure sensor, a USB / Type-C interface, a wireless charging interface, a magnetic attraction interface and the like. The in-vehicle space sensing device comprises a camera, a millimeter wave radar and the like. According to the intelligent robot arm device of the automobile cabin, the intelligent robot arm is controlled through voice or keys and the like, and the robot arm replaces personnel to complete object taking operation at a long distance or a view blind area position; distraction caused by the fact that a driver takes objects towards the back row can be avoided, and driving safety is improved. Meanwhile, the intelligent robot arm is controlled through voice or keys and the like, and the robot arm replaces personnel to complete service operations such as article storage, article fixing, games and caring; and the intelligent experience of the cabin is improved.

The invention discloses a high-precision integrated temperature and humidity sensor and a construction method. The sensor comprises an MEMS humidity capacitance sensor, a CMOS integrated temperature sensor, an analog-to-digital converter, a calibration configuration information storage array and a digital interface. Wherein the MEMS humidity capacitance sensor and the CMOS integrated temperature sensor are respectively connected with the analog-to-digital converter, and voltage signals of the MEMS humidity capacitance sensor and the CMOS integrated temperature sensor are converted into digital signals; the analog-to-digital converter transmits the digital signal to the calibration configuration information storage array for data processing and linearization processing, and transmits the data to the SDAamp through a digital interface; in SCL; wherein the MEMS humidity capacitance sensor comprises a capacitance pole plate, a protection ring and a heating resistor; the capacitor plates adopt an interdigital capacitor structure and have a regular octagonal part in overlook observation, and meanwhile, the upper and lower electrode plates and the polyimide PI material layer between the two electrode plates form the interdigital capacitor structure.

The invention provides an MEMS (Micro Electro Mechanical System) micromirror array chip, a module and optical scanning equipment. The MEMS micromirror array chip comprises a plurality of micromirror structures, a substrate, a vertical lead structure and a capacitance angle sensing structure, according to the micro-mirror array chip integrated with the capacitive sensor, array-level real-time angle detection, feedback control and high-precision scanning angle detection are realized, and the micro-mirror array chip is fast in driving and resistant to interference; meanwhile, the wiring density is reduced by frequency division multiplexing isolation signals; in addition, the application of a monolithic integrated capacitance angle sensor in a high-density micro-mirror array chip is realized by a thick substrate with a silicon through hole; and finally, the micromirror array chip of the monolithic integrated capacitance angle sensor is used for precision optical scanning equipment, a photoelectric angle detector is omitted, optical scanning high-precision real-time angle detection and feedback control, high-precision angle detection and high-speed scanning are realized, the use design is convenient, and the cost is low.

The invention provides a graphene-based capacitive sensor for detecting the moisture content in lubricating oil, a preparation method of the graphene-based capacitive sensor and a method for detecting the moisture content in the lubricating oil, and belongs to the technical field of moisture content detection. The graphene-based capacitive sensor for detecting the moisture content in the lubricating oil comprises a graphene-based electrode and a gold nanoparticle layer which are arranged in a laminated manner, the graphene-based electrode comprises a laser-induced graphene film and doped nanoparticles loaded on the surface and in pores of the laser-induced graphene film, and the doped nanoparticles are silver nanoparticles and copper oxide particle clusters; array holes are formed in the gold nanoparticle layer, the diameter of holes in the array holes is larger than the diameter of water molecules and smaller than the diameter of lubricating oil molecules, and the depth of the holes in the array holes is consistent with the thickness of the gold nanoparticle layer. The graphene-based capacitive sensor can realize real-time online detection of the moisture content in the lubricating oil, and is high in detection sensitivity and simple to operate.

The invention discloses a method for calculating blade tip clearance and vibration of a turbomachine blade based on continuous Gaussian fitting, and belongs to the technical field of fault diagnosis. A continuous Gaussian fitting (CGF) method is proposed to be used for obtaining a data signal which can be used for more accurately calculating a blade tip gap and a blade tip vibration characteristic. Compared with a conventional threshold value recognition method (TVM), the CGF method has the advantages that Gaussian fitting calibration is performed on blade tip state signals collected by the capacitive sensor, interference of environmental noise is greatly reduced, and the accuracy of blade tip clearance and vibration calculation is remarkably improved. Experimental results show that the CGF method shows better calculation stability under different rotating speed working conditions, especially at a low rotating speed, the calculation stability of blade tip vibration is 4.15 times that of a TVM method, and blade resonance can be recognized more accurately. According to the method, real-time monitoring can be realized, and more accurate blade tip clearance and vibration data can be provided.

The invention discloses a wafer carrier size laser measurement device, and relates to the technical field of laser measurement, the wafer carrier size laser measurement device comprises a measurement platform mechanism, the measurement platform mechanism comprises a mounting table, the front surface of the mounting table is provided with a control terminal, and the top of the inner cavity of the mounting table is fixedly connected with a mounting rack; and the surface of the mounting frame is fixedly connected with a first motor. According to the invention, through the arrangement of the horizontally distributed self-adaptive nodes, flexible deployment is realized by utilizing a magnetic attraction structure, and the electric telescopic rod and the silica gel contact head are matched, so that complex curved surfaces such as a three-dimensional buckle and a deep groove of a carrier can be attached in a self-adaptive manner; a vertical plane and a concave structure which are difficult to detect by a traditional device can be subjected to multi-angle scanning, a measurement blind area is thoroughly eliminated, the coverage rate of three-dimensional size detection is remarkably increased, meanwhile, a temperature and vibration compensation model is built in an intelligent compensation algorithm module integrated by a control terminal, and the influence of environmental factors on a measurement result is corrected in real time.

The invention belongs to the technical field of flexible pressure sensors, and particularly relates to an ionizing fabric-based pressure-volume sensor and a preparation method thereof. The pressure-volume sensor is composed of an upper electrode layer, a lower electrode layer and a dielectric layer, a flexible diaphragm layer is arranged between the electrode layers and the dielectric layer, and holes with certain density are formed in the flexible diaphragm layer. The ionizing fabric-based pressure-capacitance sensor is simple in structure and simple in preparation process, and meanwhile, accurate regulation and control and wide-range linear response of the ionizing contact area between the capacitance sensor electrode and the dielectric layer can be realized.

A system including a plurality of first wires and a plurality of second wires is disclosed. Each second wire overlaps over one or more first wires at a respective overlapping area of one or more first wires. A dielectric material is disposed in a vertical gap at each respective overlapping area forming a capacitance sensor including a first electrode corresponding to a first wire and a second electrode corresponding to a second wire. The first and second electrodes are connected to a positive bias and a negative bias of at least one voltage source, respectively. The system includes at least one processor configured to periodically measure change in respective electric field of each capacitance sensor of a subset of capacitance sensors of a plurality of capacitance sensors, and store data corresponding to periodically measured change in the respective electric field of each capacitance sensor of the subset of capacitance sensors.

The invention, which relates to the technical field of capacitor fault diagnosis, discloses a capacitor fault prediction and diagnosis system based on loss data, comprising a data acquisition module, an analysis module, a diagnosis module and a decision module. The data acquisition module is responsible for acquiring capacitance parameter data of a capacitor, collecting internal parameters of the capacitor through a capacitance sensor array, and transmitting the capacitance parameter data to the data preprocessing module; the data preprocessing module is used for further preprocessing the capacitance parameter data transmitted from the data acquisition module; according to the method, the percentage loss proportion and the residual service life RUL of the capacitor are calculated through the analysis unit based on the screened optimization characteristic data, different strategies are further executed in a graded mode, the loss trend of the capacitor is effectively calculated by analyzing the internal parameters C, ESR and tan delta of the capacitor, potential faults are recognized in advance, and the fault diagnosis accuracy is improved. Therefore, the accuracy of capacitor fault prediction is improved, and long-term stable operation of equipment is guaranteed.

The embodiment of the invention belongs to the household appliance technology, and provides a clothes dryer and a drying control method thereof, and the clothes dryer comprises a box body, a barrel body, a motor, a compressor, a fan, a resistance sensor, a capacitance sensor and a processor; the processor is configured to execute a first drying task, and the first drying task is configured to control the compressor to operate at a first frequency, the fan to operate and the motor to operate; when executing the first drying task, the processor is further configured to control the running duration of the first drying task; when the humidity value is smaller than the first threshold value and the air moisture content is smaller than a second threshold value, a second drying task is executed; the second drying task is configured to control the compressor to operate at a second frequency, the fan to operate and the motor to operate continuously; and when the processor executes the second drying task, the processor is further configured to control the running duration of executing the second drying task. The method and the device can improve the clothes dryness judgment precision, improve the clothes drying quality and reduce the drying energy loss.

The invention belongs to the technical field of machine learning and robot grabbing, and provides a grabbing control method based on pre-recognition. Before grabbing operation is executed, sensing data obtained when a clamping jaw does not make contact with an object is collected based on a capacitive sensor and input into a pre-trained machine learning model, the category of the object to be grabbed is recognized, and grabbing target force is obtained through the recognized object category according to the mapping relation between the object category and grabbing force; and in the grabbing stage, based on the contact force collected by the capacitive sensor, optimization control is conducted on the opening amount of the clamping jaw, and the clamping jaw clamps the object with the grabbing target force. According to the invention, before a clamping behavior occurs, additional tactile information and supplementary information modes, different from visual information of a camera, of a clamped object can be provided, and the force application range of the clamping jaw can be expanded through the sensor, so that a clamping task can be better executed.

An aerosol supply device for receiving an article comprising a first section and a second section. The aerosol supply device includes: a receiving portion configured to receive at least a portion of an article; a capacitance sensor configured to measure a capacitance on a portion of the aerosol supply device receiving the article; and a processor communicatively coupled to the capacitive sensor, the processor configured to determine whether the article has been inserted or removed based on the capacitance measured over a period of time. During insertion and / or removal of the article: when the first segment is adjacent to the capacitive sensor, the capacitive sensor measures a first capacitance value; when the second segment is adjacent to the capacitive sensor, the capacitive sensor measures a second capacitance value, the second capacitance value being different from the first capacitance value, and the processor is configured to determine, using the first capacitance value and the second capacitance value, that the article has been inserted into or removed from the receiving portion.

The invention discloses a molecular interaction analyzer with a liquid level monitoring function. Relates to the technical field of molecular interaction analyzers. The analysis assembly comprises a detector, a signal processor and a display screen; the reagent conveying assembly comprises a base, a placement frame, reagent bottles and a distribution pump, the base is connected with the side wall of the box body, a plurality of placement grooves are formed in the placement frame, the reagent bottles are placed in the placement grooves, the distribution pump is connected with the detector through a sample feeding hose, and the reagent bottles are connected with the distribution pump through a sampling hose; the liquid level monitoring assembly comprises a capacitive sensor and an electrode, the capacitive sensor is electrically connected with the signal processor, the electrode is connected with the capacitive sensor through an electric wire, an adhesion layer is arranged on the electrode, and the electrode is tightly attached to the side wall of the reagent bottle. By arranging the liquid level monitoring assembly, accurate measurement of a reagent can be ensured, overflow or insufficiency is prevented, and therefore the monitoring reliability and the automation degree are improved.

The invention relates to a three-level linkage differential capacitance sensor, which belongs to the technical field of micro electro mechanical sensors, and comprises a fixed support structure, three polar plates are horizontally arranged at the top of the fixed support structure at equal intervals along the vertical direction, and the polar plates and the fixed support structure as well as the adjacent polar plates are connected in an insulating and sealing manner; according to the invention, gas or liquid on the outer side of the sensor enters the middle cavity by using the vent holes, so that the pressure load of the gas or liquid acts on the three polar plates at the same time, and the pressure load of the gas or liquid is applied to the three polar plates at the same time; the three polar plates can deform at the same time, the gap between the two polar plates on the upper side is reduced, the capacitance between the polar plates is increased, the gap between the two polar plates on the lower side is increased, the capacitance between the polar plates is reduced, and the total output capacitance can be remarkably increased finally through differential output of the capacitance between the upper polar plate and the lower polar plate. And the sensitivity of the three-stage linkage differential capacitance sensor is greatly improved.

A flush valve assembly for an automatic sanitaryware assembly, comprising a flush valve; a status sensor; a presence sensor associated with a presence sensor lens; an antenna associated with an antenna lens; a manual override actuator; and a controller. A status sensor may comprise an ultrasonic sensor or a capacitive sensor and is configured to be affixed to a sanitaryware assembly. The status sensor is configured to communicate with the controller, the controller is configured to determine a sanitaryware status, and the antenna is configured to transmit the sanitaryware status to a network gateway.

The invention belongs to the technical field of bearing position detection, and particularly relates to a position detection method of a five-degree-of-freedom active and passive inner rotor magnetic suspension bearing, which adopts a single plate capacitance sensor to be arranged at a key position of the magnetic suspension bearing, detects the translation and rotation movement of a rotor by utilizing capacitance change, and is arranged around the inner rotor to detect the position of the magnetic suspension bearing. The key position is covered to ensure that the position change of five degrees of freedom is comprehensively detected; a capacitance change signal of the capacitance sensor is collected in real time, and the signal is transmitted to the data processing unit; five-degree-of-freedom information is extracted from capacitance change signals, the extracted five-degree-of-freedom position information is combined with an active and passive magnetic suspension control strategy, electromagnetic force is adjusted in real time, and stable suspension and accurate position control are achieved; through experimental verification and parameter optimization, it is ensured that the system achieves high-precision five-degree-of-freedom position detection and stable suspension control under different working conditions, and the effect of achieving efficient and high-precision position detection is achieved.

The invention relates to the technical field of flexible electronic sensors, in particular to a large-strain interdigital capacitive sensor based on liquid metal conductive paste, which comprises a flexible substrate, and the flexible substrate comprises a bottom packaging layer and a top packaging layer integrally connected to the upper surface of the bottom packaging layer. A liquid metal interdigital electrode is embedded between the bottom packaging layer and the top packaging layer, the liquid metal interdigital electrode is formed after liquid metal conductive paste is subjected to laser ablation patterning, the end of the liquid metal interdigital electrode is connected with a flexible wire, and one end of the flexible wire extends to the outside of the flexible substrate; the liquid metal conductive slurry is paste conductive slurry which is rich in oxide and is formed by mechanically stirring and oxidizing liquid metal; the liquid metal is gallium-based liquid metal; the problems that an existing flexible strain sensor cannot meet the large strain measurement requirement and is poor in stability and complex in preparation process are solved.

The invention relates to the technical field of capacitance detection circuits, in particular to a capacitance detection circuit based on practical differential and peak detection. According to the circuit, a practical differentiating circuit model is constructed, a capacitance value to be measured is converted into a sinusoidal signal output by a differentiating circuit, then the sinusoidal signal is converted into stable direct-current voltage by utilizing a peak holding circuit, and finally the voltage is read by a single chip microcomputer and the capacitance value is calculated. The whole circuit is simply designed, a practical differentiating circuit and a peak holding circuit serve as cores, linear conversion from weak capacitance to direct-current voltage is achieved, and a complex circuit structure of traditional capacitance detection is avoided. Through circuit structure optimization, stray capacitance interference is effectively suppressed, the detection anti-interference capability is improved, through experimental test verification, a thought and a theoretical model are provided for reading the capacitance value of the capacitance sensor, and the method has certain engineering value for application of a weak capacitance sensor.

The invention belongs to the technical field of wind-powder concentration measurement of high-concentration pulverized coal, and discloses a wind-powder online measurement system suitable for high-concentration pulverized coal. According to the invention, a capacitance method and sound wave method double-channel pulverized coal concentration measurement mode is set, abnormal condition identification and comprehensive pulverized coal concentration output are carried out based on measurement results, and errors of a single method are avoided through mutual verification of the two methods and comparison of deviation identification anomalies based on the measurement results; the advantages of the two methods are combined, the measurement precision is improved, and the anti-interference capability and long-term operation stability of the system are enhanced. A device surface hanging material dynamic cleaning mechanism is set, the surface hanging material thickness of a capacitive sensor and an ultrasonic detection device is monitored in real time through a CCD imaging device, and cleaning operation is dynamically executed with the average hanging material thickness and the proportion of the number of monitoring points exceeding the threshold value as trigger conditions. Measurement errors can be reduced, long-term stable operation of equipment is guaranteed, and system reliability is improved.

An apparatus for use at an inventory location stowing items comprises an array of sensor elements. Each sensor element comprises a plurality of conductive elements that are driven as a self-capacitance sensor. Based on changes in capacitance values, interactions between a lane and user may be determined. The conductive elements may be selectively addressed to provide various physical resolutions and operational configurations. Some geometries of conductive elements provide information about position of an interaction along a long axis of the lane, as well as presence of items in the lane. The sensor element may include three conductors, stacked atop one another and separated by an insulator. To compensate for temperature and other effects, these the outermost conductors are grounded, and innermost conductor is driven. The array may be implemented on a rigid or flexible substrate. The array operates reliably in the presence of water condensation or small spills.

An environmental detection device including a housing, a capacitance detection circuit comprising a capacitor within the housing, and a chamber within the housing. The chamber including an air inlet to allow air to pass through the housing into the chamber and an environmental sensor to detect an environmental characteristic. The device including a first mesh structure at least partially covering the air inlet of the chamber, a first metallic conductor comprising at least a first portion of the first mesh structure, a second metallic conductor separated from the first metallic conductor by at least one dielectric material, a first electrical connection from the first metallic conductor to the relaxation oscillator circuit, and a second electrical connection from the second metallic conductor to a ground, wherein the first metallic conductor and the second metallic conductor form the capacitor of the relaxation oscillator circuit.

The invention relates to a pneumatic membrane structure fluid-structure interaction multi-physics field synchronous test method, which relates to the technical field of vibration measurement, and comprises the following steps: conformally embedding a flexible capacitive sensor array in the surface of a pneumatic membrane structure, detecting mechanical vibration, ultrasonic wave, sound wave or infrasonic wave displacement through capacitance value change (electrical characteristics), and measuring the displacement of the flexible capacitive sensor array; and the capacitance value change rate delta C / C and the displacement delta x are in a linear proportional relationship. According to the pneumatic membrane structure fluid-solid coupling multi-physics field synchronous test method, a flexible capacitive sensor array is conformally embedded in the surface of a pneumatic membrane structure, and mechanical vibration, ultrasonic wave, sound wave or infrasonic wave displacement is directly detected by using capacitance value changes; wherein the linear proportional relation between the capacitance value change rate delta C / C and the displacement delta x is directly determined by the electrode distance and the dielectric constant of the capacitive sensor, so that the physical directness of vibration wave measurement is realized, the error caused by indirect calculation depending on a traditional strain gauge or an optical method is avoided, and the vibration wave displacement measurement precision is remarkably improved to + / -0.5% full scale.

This invention is entitled "Continuous Touch Input on Multiple Independent Surfaces." A touch input device is provided with the ability to sense capacitive loads in a two-dimensional array while also being able to sense deflection or movement of the input device at multiple different locations beneath the input plate. The touch input device can be advantageously used in a remote control device and can be used with multiple input buttons or platforms that overlay multiple capacitive touch input areas on a capacitive touch sensor substrate. Movement and positioning of the capacitive loads can be tracked and calculated through output signals from a set of electrodes or other capacitive sensors that have irregular shapes, inconsistent distances from the capacitive loads, and are positioned beneath variable materials and material compositions. Thus, track gestures and taps can be detected using the capacitive sensing device and deflection inputs can be detected using switches or other actuators positioned beneath the capacitive sensing device.

The utility model relates to the field of electric beds, in particular to an anti-pinch electric bed. A bed board of an existing anti-pinch electric bed uses a single infrared sensor, the monitoring range is small, although the infrared sensor is matched with a capacitive sensor, the range is wide, but the cost is high, and therefore the anti-pinch electric bed comprises a bed frame, the bed board and a driving device. The bed plate is formed by splicing a fixed plate distributed in the length direction of the bed frame and a plurality of movable plates, infrared sensors are arranged on the lower surfaces of the movable plates, at least two infrared sensors are arranged on the movable plates with the infrared sensors, and the two infrared sensors monitor the side edge areas of the adjacent movable plates and the end areas of the movable plates on the same side respectively. According to the electric bed, the two or more infrared sensors are arranged on the lower surface of the movable plate, the two infrared sensors can monitor the adjacent plate side edge areas on the left side and the right side and the plate end area on the same side respectively, the left side, the right side and the end positions of the plate are prevented from being pinched, and the use safety of the electric bed is improved.

The invention relates to the technical field of railway signal processing, and discloses a track circuit compensation capacitor fault prediction method and system. The method comprises the following steps: acquiring real-time impedance spectroscopy data by using a distributed capacitive sensor network; performing multi-scale wavelet decomposition on the data, and extracting frequency domain energy distribution and transient abnormal fluctuation characteristics; constructing a dynamic Bayesian network model, and updating hidden state node posterior probability distribution through a variational inference algorithm; generating a fault risk index sequence based on a posterior probability, and designing an adaptive threshold adjustment strategy by using a reinforcement learning framework; constructing a mixed integer dynamic programming model to output fault early warning grade data; and constructing a multi-stage decision tree which comprises a feature screening layer, a pattern matching layer and a verification feedback layer. The method and the system can accurately predict the track circuit compensation capacitor fault in real time, improve the fault prediction accuracy and the system adaptability, reduce the false alarm rate, and provide reliable basis for railway operation and maintenance.

The invention relates to the technical field of electrometer measurement, and particularly discloses a high-precision electrometer based on an intelligent algorithm and a signal processing method thereof. The high-precision electrometer based on the intelligent algorithm comprises a capacitive sensor module, and the capacitive sensor module obtains an electrostatic signal and converts the electrostatic signal into a digital signal. The preprocessing module carries out noise suppression processing on the digital signals, external interference is removed, and the stability of the signals is improved. And the signal processing module performs feature extraction and analysis on the corrected signal by using a deep learning algorithm, so that the measurement precision is further improved. The correction output module obtains an error correction value through historical data fitting, calculates a final static value in combination with a static predicted value, and ensures the accuracy and reliability of a measurement result.

The invention discloses a dynamic liquid level detection system and method based on a capacitance-photoelectric dual-mode sensor, and the system comprises a dual-mode sensor module which comprises a capacitance sensor used for measuring the capacitance value change caused by the liquid level change; the photoelectric sensor is used for measuring the light intensity change caused by the liquid level change; the signal processing module is used for processing original signals of the capacitive sensor and the photoelectric sensor; the dynamic calibration module comprises a temperature sensor and a microcontroller MCU, and the microcontroller MCU is configured to receive and process the signal from the signal processing module; dynamically adjusting the excitation frequency of the capacitive sensor according to the temperature value read by the temperature sensor and a preset sample viscosity type; based on a self-adaptive weighted fusion algorithm, fusing the processed capacitance signal and the photoelectric signal, and outputting final liquid level information; and when bubbles are detected, the control system is switched to a pure capacitance detection mode. According to the invention, high-precision liquid level detection can be realized.