24 results about "Temperature modulation" patented technology

The embodiment of the invention provides a volatile organic compound identification method based on a multi-temperature modulation gas sensor array and related equipment, and belongs to the technical field of volatile organic compound identification. The method is applied to a multi-temperature modulation gas sensor array. The gas sensor array comprises a plurality of sensing elements with different gas reaction characteristics and corresponding heaters; the method comprises the following steps: at different working temperatures, controlling a gas sensor array to carry out gas-sensitive response test on gas to be tested, acquiring gas-sensitive response characteristics of each sensing element at different working temperatures, and summarizing acquired results to obtain a multi-dimensional characteristic set of the gas to be tested; inputting the multi-dimensional feature set of the to-be-detected gas into the trained gas recognition model for calculation to obtain a gas recognition result of the to-be-detected gas; according to the method disclosed by the embodiment of the invention, temperature modulation and different material doping proportions are introduced into the gas sensing array, so that the characteristic dimension can be greatly expanded, and the selectivity of the MOS gas sensor is improved.

The invention provides a gas sensor low-delay classification method based on a sliding window and confidence accumulation, and relates to the technical field of gas sensing and intelligent diagnosis. The invention provides an SWSD-CAD framework aiming at the problem of high detection delay caused by dependence on a complete periodic signal of an existing temperature modulation gas sensor. According to the framework, a small window sliding detection (SWSD) strategy is adopted, and high-frequency online analysis is carried out on real-time data streams; meanwhile, continuous prediction results are arbitrated through a confidence cumulative decision CAD logic, and a final decision is made only when the prediction results continuously meet a confidence threshold within a preset time, so that the reliability of the results is ensured. In order to realize the framework, the invention designs a ConvMama hybrid network model which is used for efficiently extracting discriminative features in a short signal window. According to the invention, on the premise of ensuring high classification precision, the detection delay is obviously reduced, and early, rapid and reliable identification of gas types is realized.

This invention provides a low-latency classification method for gas sensors based on sliding window and confidence accumulation, relating to the fields of gas sensing and intelligent diagnostics. Addressing the high detection latency caused by existing temperature-modulated gas sensors relying on complete-cycle signals, this invention proposes a SWSD-CAD framework. This framework employs a small-window sliding detection (SWSD) strategy to perform high-frequency online analysis of real-time data streams. Simultaneously, it arbitrates continuous prediction results through confidence accumulation decision CAD logic, making a final decision only when the prediction result continuously meets a confidence threshold within a preset time, ensuring the reliability of the results. To implement this framework, this invention designs a ConvMamba hybrid network model for efficiently extracting discriminative features within short signal windows. This invention can significantly reduce detection latency while maintaining high classification accuracy, achieving early, rapid, and reliable identification of gas types.

Cooling provided by a thermal management system may be controlled actively to reduce or prevent entering a dry out state. The systems and methods described herein include monitoring temperature metrics and identifying or predicting the onset of a dry out state, and temperature modulation mechanism may be controlled to cause an increase in the temperature of the heat pipe or vapor chamber. By controlling a temperature modulation mechanism to increase the operating temperature, the viscosity of the liquid in the thermal management approach is decreased, which improves its capillary flow and return rate back to the evaporator. By leveraging this temperature-dependent behavior, this thermal control approach may restore cooling capacity by managing the thermal management approach temperature due to a dry out state, and reduce or minimize the computing device performance degradation associated with a dry out state.

A temperature modulation system for a bed, blanket, or other furniture includes a fluid for moderating temperature change, a number of conduit circuits for directing the fluid through respective zones, a control unit including a thermoelectric device for modulating temperature of the fluid, and a pump. Each of the conduit circuits selectively and independently directs fluid through its respective zone in order to produce a temperature within the zone that is independent of the temperature outside the zone. The system also includes an arrangement of one or more zones in an arrangement in which the control unit is programmed to vary the zone temperature over time according to a schedule.

This invention relates to the field of predictive maintenance technology and discloses a method for predicting the life of flange seals based on digital twins. The method includes: first, acquiring initial parameters to establish an initial reference acoustic energy density; then, acquiring real-time data to calculate the real-time raw acoustic energy density. Phase cancellation is performed based on the node spatial distance and real-time sound velocity to eliminate interference energy and obtain the decoupled true acoustic energy density. The decoupled density is compared with the reference density and substituted into an exponential model to calculate the microcavitation degradation factor. The degradation factor and real-time temperature are used to modulate the fluid density, thereby obtaining the fluid equivalent wave velocity, and combining this with pressure variables to calculate the asynchronous warping phase difference. The real-time residual clamping stress is obtained by reducing the preload stress based on the cosine value of this phase difference and the acoustic energy attenuation ratio. Finally, the transient fatigue damage evolution rate is calculated based on the residual stress and operating time to estimate the remaining life.

The invention provides a gas sensor temperature and humidity compensation method based on feature space reconstruction, and relates to the technical field of gas recognizing.The method comprises the steps that firstly, a high-dimensional dynamic response signal is obtained based on temperature modulation, and temperature and humidity are recorded at the same time; then, carrying out linear discriminant analysis conversion by taking the temperature and the humidity as category labels to obtain characterization signals; the characteristic with the characterization signal close to the front is set to be 0 to eliminate temperature and humidity information, and then inverse transformation is carried out to achieve the purpose of temperature and humidity compensation; the influence of temperature and humidity interference on the gas sensor can be remarkably reduced, and the gas recognition precision based on the gas sensor signal can be improved.

The application belongs to the technical field of chemical analysis and detection, and particularly relates to a temperature-electric field combined modulation surface ionization detection system and method. The system comprises a pretreatment unit, a combined modulation detection unit, a signal acquisition unit and a control unit. The combined modulation detection unit comprises a cavity, a first heating wire is arranged in the upper shell, one end of the first heating wire is further connected with the positive pole of a program-controlled bipolar high-voltage power supply, the negative pole of the program-controlled bipolar high-voltage power supply is connected with the upper shell, a second heating wire is arranged in the lower shell, one end of the second heating wire is further connected with the positive pole of a high-voltage power supply, and the negative pole of the high-voltage power supply is connected with the lower shell. The temperature modulation and the electric field inversion modulation are combined creatively, complementary information provided by two physical mechanisms is utilized, the cation types and the anion types of alkali metals can be effectively distinguished at the same time, and the problem of insufficient single technical information dimension is solved.

Provided is a light detection device including a Peltier element that includes a P-type semiconductor and an N-type semiconductor disposed between a first substrate and a second substrate, and a light receiving part that receives light from the object having been subjected to temperature modulation by the Peltier element, in which the first substrate is provided on the object side, the second substrate is provided on the light receiving part side, and at least parts of the first substrate and the second substrate transmits light from the object. The present technology can be applied to, for example, a detection device that detects a predetermined material by receiving and analyzing light from an object to be measured.

The present invention is an analysis device 100 that employs light absorption to analyze a measurement target component contained in a sample, and that reduces fluctuations in a modulation width of an oscillation wavelength of a laser light source that are caused by changes in the ambient temperature so as to enable the concentration of the measurement target component to be measured accurately. This analysis device 100 is provided with a laser light source 2 that irradiates reference light onto the sample, a photodetector 5 that detects an intensity of sample light that is generated as a result of the reference light being transmitted through the sample, a temperature adjustment unit 3 that adjusts a temperature of the laser light source, a temperature sensor 4 that detects an ambient temperature around the laser light source, a relational data storage unit 73 that stores modulation correction relational data that shows a relationship between the ambient temperature of the laser light source 2 and correction parameters that are used to correct a shift in the modulation width of an existing modulation width of the laser light source that is used to measure the measurement target components, and a control unit 7 that, using detection temperatures from the temperature sensor 4 and the modulation correction relational data, alters a target temperature of the temperature adjustment unit 3 or at least one of a drive voltage or drive current that is applied in order to perform wavelength modulation on the laser light source 2.

An image extraction device comprises a device shell, a lens, a vibration unit and a temperature modulation unit. The lens is arranged on the device shell. The vibration unit is suitable for applying vibration to the lens. The temperature modulation unit is suitable for modulating the temperature of the lens.

A computer-implemented hazard detection method using at least one processing unit in signal communication with at least one storage device and a gas-sensitive sensor element, wherein the sensor element is configured to be in environmental contact with an external atmosphere, comprises (i) applying a temperature sequence comprising multiple target temperature levels for a predetermined duration to the sensor element, by optionally using a heater, (ii) obtaining at least one electrical property measurement of the sensor element, (iii) processing the at least one electrical property measurement using the at least one processing unit to produce a data set, and optionally saving the data set to the at least one storage device, wherein the data set comprises an electrical property value list of at least one electrical property value, wherein the at least one electrical property value is representative of the at least one electrical property measurement at one of the multiple target temperature levels or during a transition between one pair of target temperature levels, and a change time value list with at least one change time value, wherein the at least one change time value is representative of the change time of the at least one electrical property measurement at one of the multiple target temperature levels or during a transition between one pair of target temperature levels, and / or electrical property change value list with at least one electrical property change value, wherein the at least one electrical property change value is representative of the change of the electrical property change at one of the multiple target temperature levels or during a transition between one pair of target temperature levels, (iv) determining a result based on the data set and a prediction data set stored on the at least one storage device, wherein the result comprises fake abnormal, normal or pre-alarm, and (v) determining whether a hazard is present based on the result.

The application provides a gas sensor temperature and humidity compensation method based on feature space reconstruction, relates to the technical field of gas identification, and first obtains a high-dimensional dynamic response signal based on temperature modulation, and records temperature and humidity at the same time; then, linear discriminant analysis conversion is carried out by taking the temperature and humidity as category labels to obtain a characteristic signal; the features in the front of the characteristic signal are set to 0 to eliminate the temperature and humidity information, and then inverse conversion is carried out to achieve the purpose of temperature and humidity compensation; the application can significantly reduce the influence of temperature and humidity interference on the gas sensor, and is beneficial to improving the gas identification precision based on the gas sensor signal.

The invention provides a temperature and magnetic field measurement method and device based on a diamond NV color center and a chip. The method comprises the steps that a sample to be measured is placed on a sample table with diamond; emitting laser to the sample table to excite the NV color center of the diamond; the microwave system adopts a modulation mode with the frequency of f1 to emit modulation microwaves to the sample to be tested; the sCMOS camera collects a first fluorescence image emitted by the diamond at the frequency f2; meanwhile, turning on a switching power supply of the sample to be detected, performing temperature modulation, performing frequency phase-locked modulation on the on-off state of the switching power supply in combination with the frequency of the microwave system, and acquiring a second fluorescence image emitted by the diamond by the sCMOS camera; demodulating the obtained first fluorescence image and the second fluorescence image as a period to obtain the temperature variable of the sample to be detected, and the sensitivity and the detection speed of chip temperature measurement can be improved.

This invention relates to the field of acoustic wave modulation, and proposes a thermoacoustic signal modulation system and method, including a thermoacoustic modulation device and a closed-loop feedback control circuit. The thermoacoustic modulation device includes a medium for propagating sound waves and a thermal modulation unit integrated on or near it. The thermal modulation unit has temperature-sensitive electrical characteristics, and its electrical parameters are functionally related to temperature. The closed-loop feedback control circuit is electrically connected to the thermal modulation unit, determines the current temperature state based on the real-time electrical parameters of the thermal modulation unit, and generates driving power applied to the thermal modulation unit when there is a deviation between the target control signal and the current temperature state. The closed-loop feedback control circuit applies transient overdrive power to the thermal modulation unit when the temperature deviates passively or actively from the target temperature, so as to quickly reach and lock the target temperature. This transforms temperature modulation from passive thermal relaxation to active control based on electrical feedback.

The invention discloses a welding penetration identification model training method and system based on modal alignment loss, and relates to the technical field of welding quality intelligent monitoring. According to the method, a staged optimization training strategy for temperature modulation is provided for the modal difference problem between arc sound and arc voltage signals. According to the strategy, a modal alignment loss function is introduced, the weight of the modal alignment loss function is dynamically adjusted in stages, and two branches of a lightweight double-branch neural network model are guided to be aligned in a high-level feature space, so that a modal gap is bridged. The system comprises a signal acquisition unit, a signal processing unit, a signal calculation analysis unit and a signal output unit, the calculation analysis unit runs a model obtained by training through the method, and the model integrates a dynamic feature adaptive fusion module and can perform intelligent weighted fusion on bimodal features. According to the method, the accuracy and robustness of fusion penetration state recognition are effectively improved, and meanwhile, the model lightweight design meets the deployment requirement of industrial field real-time monitoring.

An automated polymerase chain reaction (PCR) analyzer (110) for analyzing at least one sample (112) and a method of automated PCR analysis is disclosed. The automated PCR analyzer (110) comprises: - at least one controller (114); - at least one thermocycling apparatus (116) configured for subjecting the sample (112) to at least one temperature modulation controlled by the controller (114); and - at least one photometer (118) configured for detecting at least one optically detectable property of the sample (112), the photometer (118) comprising at least one excitation light source (120) configured for illuminating the sample (112) with excitation light (122), the photometer (118) further comprising at least one photodetector unit (124) configured for detecting light (123) emitted from the sample (112), the photometer (118) further comprising a movable filter cell (126) controllable by the controller (114), the movable filter cell (126) comprising a plurality of filter cell units (128), each filter cell unit (128) comprising at least one optical excitation filter element (130), at least one dichroic filter (132), at least one optical detection filter element (134) and at least one the aperture stop (174), wherein the photometer (118) comprises a working position for the filter cell units (128), wherein the movable filter cell (126) is configured for selectively positioning a selected filter cell unit (128) selected from the plurality of filter cell units (128) in the working position, wherein, in the working position, the selected filter cell unit (128) is positioned such that the excitation light (122) interacts with the optical excitation filter element (130), the dichroic filter (132) and the aperture stop (174) of the selected filter cell unit (128) and that the light (123) emitted from the sample (112) interacts with the dichroic filter (132), the aperture stop (174) and the optical detection filter element (134) of the selected filter cell unit (128).

This invention provides a rapid gas concentration detection method based on time-sliding window aligned hysteresis differential analysis, belonging to the field of gas detection and analysis technology. This invention utilizes a temperature-modulated semiconductor gas sensor to obtain a response signal for the gas to be detected in real time. A time-sliding window is used to acquire the current window signal from the real-time detected response signal, and aligned hysteresis differential analysis is performed. Based on the aligned hysteresis differential analysis result, the operating state of the semiconductor gas sensor is determined, and the window signal in a stable operating state is found. Finally, the gas concentration is calculated based on a multiple linear regression model. This invention improves the speed, stability, and accuracy of gas concentration detection by semiconductor gas sensors, achieving simple, fast, and accurate gas concentration detection.

The application discloses a dual-mode temperature control method and device for an eye massager. The application obtains temperature-pressure state pairs of each heating partition, calculates equivalent thermal contact thermal resistance, and intelligently judges the temperature control mode in combination with temperature deviation values and air bag pressure fluctuation states. In a steady-state hot compress mode, thermal resistance feedforward compensation is implemented; in a pulse hot compress mode, a temperature modulation envelope synchronized with the charging and discharging cycle is generated. A cross-zone thermal crosstalk compensation mechanism is innovatively introduced, effectively suppressing the heat interference between adjacent heating partitions. The application also realizes the coordinated change of temperature and air bag pressure by constructing a thermal resistance-pressure nonlinear mapping relationship, thermal advance compensation and natural cooling strategy. The application improves the temperature control accuracy and stability, realizes independent and accurate control of each partition, optimizes the energy utilization efficiency, and enhances the comprehensive effect of hot compress massage.

A temperature modulation system for a bed, blanket, or other furniture includes a fluid for moderating temperature change, a number of conduit circuits for directing the fluid through respective zones, a control unit including a thermoelectric device for modulating temperature of the fluid, and a pump. Each of the conduit circuits selectively and independently directs fluid through its respective zone in order to produce a temperature within the zone that is independent of the temperature outside the zone. The system also includes an arrangement of one or more zones in an arrangement in which the control unit is programmed to vary the zone.

The invention provides a temperature control method and system for a gas water heater, and when a large thermal load adjustment event is detected, the temperature control process comprises the following steps: in a water temperature lag response stage, outputting according to an increased thermal load value; wherein the duration of the water temperature lag response stage is dynamically determined according to the current water flow; in a normal thermal load output stage, outputting according to a normal thermal load value smaller than or equal to the increased thermal load value; and in the automatic constant-temperature modulation stage, the water outlet temperature is kept stable through a PID control algorithm. According to the temperature control method and system for the gas water heater, the outlet water temperature can more quickly approach the set value, the time for the outlet water temperature to approach the set value is shortened, and the response speed for the outlet water temperature to approach the set value is increased. And then the normal heat load value is switched for heating, and the output target value is stabilized, so that the water outlet temperature can rapidly reach the set temperature, and the water temperature fluctuation is small in the using process. And in the automatic constant-temperature modulation stage, the water outlet temperature is kept stable through a PID control algorithm.

The utility model discloses a kind of integrated handheld spectrometer, belong to spectral detection equipment technical field.The spectrometer includes spectrometer body, integrated optical integrated chip (including arrayed waveguide grating and adjustable optical filter) in silicon substrate, light source system, detection system and data processing system.Optical integrated chip adopts Z-shaped arrayed waveguide grating structure, and the resolution of 0.05nm level is reached with 3% of the light splitting efficiency promotion;Adjustable optical filter realizes center wavelength dynamic tuning (range 10-5nm, precision ±0.1 DEG C) by temperature modulation device (micro thermoelectric refrigerator+temperature sensor).Spectrometer body is ergonomics handle design, integrated operation button and liquid crystal display screen.Compared with prior art, the utility model significantly reduces volume, reduces cost by silicon-based integrated optical technology, while improving resolution and stability, suitable for alloy, ore, environment, consumer goods and other fields of on-site rapid detection.

The application discloses a kind of gas concentration identification methods based on short period temperature modulation signal of semiconductor oxide sensor array.The method is aimed at the dynamic characteristics of sensing signal under temperature modulation condition, and a kind of double-layer feature extraction and timing modeling structure is designed.Firstly, the sensing response signal in each temperature modulation period is extracted in parallel using the path signature mechanism, and multidimensional periodic characteristics are obtained.Secondly, the characteristics of each modulation period are combined in time sequence to construct a cross-period time series representation.Finally, the global correlation features of the time series are extracted using the Transformer model to realize the regression prediction of the mixed gas component concentration.The application improves the accuracy and prediction stability of gas concentration identification through the algorithm structure design of sensing signal features.

This application provides a method for measuring a dynamic thermal expansion property of a nano-film, and relates to the technical field of measurement. The method is applied to an ellipsometer equipped with a temperature-controlled heating stage. The method includes: controlling a temperature of a film sample on the temperature-controlled heating stage according to a resonant temperature modulation program, and obtaining a thickness-time curve of the film by using the ellipsometer; determining, by using a digital signal processing method based on the obtained thickness-time curve, an amplitude and a phase of a resonant dynamic change generated for a thickness of the film in response to the temperature modulation program, to obtain an amplitude-time curve and a phase-time curve; and further determining a coefficient of apparent thermal expansion, a coefficient of reversible thermal expansion, and a coefficient of irreversible thermal expansion for the film sample.