43results about How to "Small error in temperature measurement" patented technology

The invention discloses a temperature measurement system based on an image sensor, which is characterized in that: it includes an imaging system, an image sensing system and an image processing system; the imaging system includes a filter and a lens, and the lens includes a lens and an aperture for The thermal radiation signal of the measured object is gathered on the photosensitive surface of the CCD, and the passing luminous flux is controlled at the same time; the image sensing system includes a color CCD camera and a USB extender, and the color CCD camera is used for photoelectric conversion, outputting temperature information RGB signal and USB extension are used to realize remote control and remote high-speed transmission of data; the image processing system is used for temperature calculation, temperature field display and analysis and processing data. The three-primary-color temperature measurement method of the invention reduces the temperature measurement error caused by factors such as the gray scale change of the heat radiator and the non-ideality of the CCD response wavelength bandwidth, and the image segmentation method can quickly and accurately segment the target image.

The invention discloses a double-wavelength single receiving channel-based rotation Raman temperature measurement laser radar. The laser radar is based on two working wavelengths and a single receiving channel. The two working wavelengths of the laser radar are respectively composed of odd number pulses and even number pulses. The low-quantum-number rotation Raman signals of one working wavelength and the high-quantum-number rotation Raman signals of the other working wavelength are extracted by the receiving channel of the laser radar. The laser radar is operated alternately at the two working wavelengths in the time division multiplexing manner. The atmospheric temperature is calculated based on the ratio of high-quantum-number rotation Raman signals to low-quantum-number rotation Raman signals. According to the technical scheme of the invention, the rotation Raman temperature measurement is realized only by means of a single filter, a single detector and a single acquisition card. Compared with a single-wavelength double receiving channel-based rotation Raman temperature measurement laser radar, the above laser radar is compact in structure, wherein the difficulty of optical path adjustment and the difficulty of system parameter calibration are lowered. Meanwhile, the double-wavelength single receiving channel-based rotation Raman temperature measurement laser radar is low in cost. The working performance difference between the filter and the detector caused by the inconsistence of working environments can be avoided. Moreover, the detection accuracy, the system stability and the environmental adaptability are improved.

The invention discloses a high-precision temperature sensor circuit and belongs to the technical field of electronic circuits. Firstly, a bandgap reference module is utilized to generate a bandgap reference voltage and a positive temperature coefficient voltage; then, two identical voltage-to-frequency conversion circuits are used to convert the positive temperature coefficient voltage and the bandgap reference voltage into a positive temperature coefficient voltage frequency and a bandgap reference voltage frequency, respectively; finally, two counters are used to count; and after a second counter is full, the first counter stops counting by a feedback signal, and a temperature value is obtained by obtaining a ratio of the positive temperature coefficient voltage to the bandgap referencevoltage. The designed temperature sensor has a simple structure and can realize low power consumption; a chopper operational amplifier is used in the bandgap reference module to eliminate an error caused by offset of an operational amplifier; a system chopper module is added behind the bandgap reference module to reduce a temperature detection error caused by a comparator offset voltage; and the high-precision temperature sensor circuit provided by the invention has the advantages of simple structure, low power consumption and small temperature measurement error.

The invention discloses an emissivity measurement method. The method comprises the processes of establishing an optimized emissivity measurement model, and measuring the emissivity of an object to be measured through using the optimized emissivity measurement model. The optimized emissivity measurement model establishing process concretely comprises the following steps: establishing an initial emissivity measurement model, selecting an object having a same material with the object to be measured as an experiment object, setting an emissivity estimation value epsilon'o, and calculating the set temperature T''obj of the experiment object; putting the experiment object in a blackbody furnace, setting the temperature of the blackbody furnace to be T''obj, and calculating the temperature Tobj of the experiment object in the blackbody furnace and the ambient temperature Tsur outside the blackbody furnace after stable reading; capturing heat radiation itot of the experiment body by using an infrared thermal imager; substituting the itot, the Tobj and the Tsur into the emissivity measurement model, calculating to obtain the emissivity epsilono of the experiment object, comparing the epsilono with the epsilon'o, and ending optimization if the epsilono is greater than the epsilon'o; and resetting the epsilon'o if the epsilono is smaller than the epsilon'o, and re-optimizing until the epsilono is greater than the epsilon'o. The method is simple and fast; and when the optimized emissivity measurement model is used to measure the emissivity of the object, the measurement result is accurate.

The invention relates to a multipoint temperature measuring interface device of a vacuum furnace. The interface device comprises flange locknuts, temperature measuring thermocouples, a flange cover and multipoint temperature measuring pipes. The flange cover is provided with outer holes and inner holes, the multipoint temperature measuring pipes are connected to the outer holes in the bottom of the flange cover and penetrate into the flange locknuts to be fixed, the temperature measuring thermocouple are connected into the inner holes in the flange cover and provided with inductors, fixing bases are installed at the inner holes, locking threads are arranged on the outer sides of the fixing bases and fixedly connected with the inner holes, hollow round pipes are arranged in the centers of the fixing bases, the temperature measuring thermocouples are connected with the insides of the hollow round pipes, oblique openings are formed in the inner sides of the pipe openings of the hollow round pipes, O-shaped sealing rubber rings are placed in the oblique openings, spacers are installed at the top ends of the fixing bases and are fixedly sealed through sealing lock nuts, gaps between the temperature measuring thermocouples and the flange cover can be well fixedly sealed through the fixing bases, and the effect of reducing temperature measuring errors is achieved.

The invention belongs to a temperature sensor for high temperature measurement, and relates to a high-temperature temperature sensor based on a surface-modified tungsten-rhenium thermocouple for short-time temperature measurement below 2600 K. In the invention, a composite ceramic material is used as the protection film of the tungsten-rhenium thermocouple to prevent the change in the thermoelectric characteristics of the tungsten-rhenium thermocouple due to the erosion of oxidative gas. Through the film coating treatment, a composite high-temperature-resistant and anti-oxidant ceramic material grows on the surface of the tungsten-rhenium thermocouple to ensure the normal use of the thermocouple wire. Meanwhile, a special protection sleeve material is used to ensure a less comprehensive temperature measurement error during the temperature measurement of high-temperature air flow through theoretical analysis and numerical calculation. Therefore, the high-temperature temperature sensor is applicable to the high-temperature air flow environment and can keep the enough thermal strength to ensure the temperature measurement accuracy with the aid of a proper structure. In addition, the high-temperature temperature sensor has the advantages of high temperature resistance, high oxidation resistance, quick response and the like.

The invention discloses a wireless temperature measurement type wok. The wireless temperature measurement type wok comprises a wok body, a temperature detection circuit, a first wireless transceiving device and a wireless power supply device, wherein the wok body comprises an inner wok surface and an outer wok surface, the temperature detection circuit is arranged in a cavity formed between the inner wok surface and the outer wok surface and is used for detecting the temperature of the wok body, the first wireless transceiving device is electrically connected with the temperature detection circuit and is used for sending temperature data detected by the temperature detection circuit in a wireless signal manner, and the wireless power supply device arranged in the cavity is used for generating electric energy by magnetically coupling with an alternating field and supplying electricity to the temperature detection circuit and the first wireless transceiving device through the electric energy. An induction cooker with the wireless temperature measurement type wok has the beneficial effects of rapidity in temperature sensing, small temperature measurement error and capability of detecting the temperature of the wok in real time.

The invention discloses a temperature sensor circuit with a built-in clock, which belongs to the technical field of electronic circuits. Firstly, a band-gap reference module is used to generate band-gap reference voltage and positive temperature coefficient voltage; then, two identical voltage frequency conversion circuits are used for converting the positive temperature coefficient voltage and the band-gap reference voltage to a positive temperature coefficient voltage frequency and a band-gap reference voltage frequency; and finally, counting is carried out through two counters, after full counting of the second counter, the first counter stops counting through feedback signals, and the size of a temperature value is acquired through acquiring the ratio of the positive temperature coefficient voltage to the band-gap reference voltage. The designed temperature sensor has a simple structure, and low power consumption can be achieved; a chopper operational amplifier is used in the band-gap reference module for eliminating errors caused by operational amplifier maladjustment, a system chopper module is added behind the band-gap reference module for reducing errors of comparator maladjustment voltage on temperature detection, the second counter generates first clock signal and second clock signal, and advantages of a wide frequency range, adjustable clock frequency and the like are achieved.

The invention provides a system and method for detecting the temperature of a heat affected zone and a storage medium. The method is characterized in that a plurality of temperature measuring points with different depths are arranged at different positions of an estimated heat affected zone of a matrix, laser cladding of the matrix is carried out through a laser, and the system comprises a plurality of temperature sensors which are arranged in one-to-one correspondence with a plurality of temperature measuring points and are used for detecting the temperature of the corresponding temperature measuring points, and a data device used for acquiring temperature detection data, the cladding time is recorded, a temperature time curve of each temperature measuring point in the cladding directionis obtained according to the temperature detection data and the cladding time, the temperature time curves at different moments are converted into temperature space distribution of the heat affected zone at the same moment according to the cladding speed, and temperature data of the heat affected zone are obtained according to the temperature space distribution. The method is advantaged in that accurate and reliable temperature parameters can be obtained through direct measurement, and a data basis is provided for researching structural gradient and mechanical property evolution of materials.

The invention belongs to temperature sensors for high temperature measurement, and relates to a double-screen air suction type sapphire optical fiber high temperature sensor. The double-screen air suction type sapphire optical fiber high temperature sensor is suitable for measuring airflow temperature in the temperature zone of 1,300 K to 2,000 K. The high temperature sensor is composed of sapphire optical fibers with black cavities, a precious metal shielding cover, single-core multi-mode silica optical fibers, a photovoltaic conversion and data processing system and the like. In order to guarantee the accuracy of high temperature airflow temperature measurement, the precious metal shielding cover is designed to be of a double-screen air suction type structure to reduce heat transfer errors and speed errors. The advantages of being accurate in temperature measurement, fast in response, high in anti-electromagnetic interference capacity and the like are achieved, and the aim of high temperature measurement under the high-temperature high-speed airflow environment in the temperature zone of 1,300 K to 2,000 K can be achieved.

An intelligent indoor temperature acquirer is a temperature measurer for indicating indoor temperature. A temperature sensor acquires and processes temperature signals, the temperature signals are transmitted to a signal processor to be processed and calculated, and results are displayed on a display device or transmitted to other equipment via a communication unit. Nonlinear errors are reduced by a DS18B20 temperature measuring principle, linear errors are reduced by piecewise linearity and a least square method, and temperature measurement accuracy is improved. A low-power-consumption element is adopted, and the intelligent indoor temperature acquirer is powered by a lithium battery which is charged by solar energy.

The invention discloses an atmospheric Raman-Rayleigh scattering temperature measurement laser radar and an inversion method. The laser radar comprises a laser transmitting unit (1), a receiving telescope (2), a receiving optical fiber (3), a signal detecting unit (4) and a signal processing unit (5). A high-resolution spectrum detection method is adopted to measure Rayleigh scattering spectral signals generated on atmospheric molecules by laser higher than 30km or above and Raman scattering spectral signals generated on atmospheric molecules by laser lower than 30km; and inversion is carried out to obtain the temperature of atmosphere at 30km, or above or below can be obtained based on a characteristic that the Raman scattering spectrum is in direct proportion to the Rayleigh scattering spectrum in echo intensity, and therefore, the temperature measurement space range of the Rayleigh scattering temperature measurement laser radar can be expanded. The atmospheric Raman-Rayleigh scattering temperature measurement laser radar has the advantages of wide temperature measurement height range and small temperature measurement error.

The invention discloses a full-automatic small-size alternating current and direct current control aluminum groove ice making machine. The full-automatic small-size alternating current and direct current control aluminum groove ice making machine comprises an aluminum alloy ice making groove connected with a gear transmission assembly. A temperature sensor and a heater are arranged at the bottom of the aluminum alloy ice making groove. The side wall of the aluminum alloy ice making groove is further provided with a corrugation type cold runner. Electric heating blocks are arranged at the four bevel positions of the corrugation type cold runner. The corrugation type cold runner comprises a temperature compensation chamber, a cold runner inlet and a cold runner outlet are formed in the outer side of the temperature compensation chamber, and a condensation agent inlet is further formed in the cold runner inlet. A concave arc cooling groove is formed in the bottom of the temperature compensation chamber, a temperature induction medium and an induced draft fan set are further arranged in the temperature compensation chamber, and the concave arc cooling groove is filled with a condensation agent. According to the full-automatic small-size alternating current and direct current control aluminum groove ice making machine, the beneficial effects that the control efficiency is high, the size is small, the occupied refrigerator volume is small, and energy consumption is low are achieved; and the ice making strength of the aluminum groove ice making machine can be improved, ice disengaging is easy, and the actual using requirement is met.

The invention discloses a wireless passive temperature measurement monitoring method for substation high-voltage switch cabinets. The method comprises the steps of: (1) integrating UHF electronic tagson temperature measurement sensors, mounting the temperature measurement sensors in the high-voltage switch cabinets by watch pocket type structures, and mounting temperature measurement data acquisition devices communicated with the UHF electronic tags in the high-voltage switch cabinets; (2) by the temperature measurement data acquisition devices, acquiring data measured by each temperature measurement sensor, and uploading the data to a station side management display screen for display; and (3) uploading the data to a remote online monitoring terminal by the station side management display screen, and carrying out centralized monitoring on a temperature condition of each substation high-voltage switch cabinet in a region which needs to be monitored. According to the invention, later maintenance cost of batteries and the sensors is avoided; the wireless passive temperature measurement monitoring method is energy-saving and environmental-friendly; a power supply wire and a data transmission cable are completely omitted; maintenance-free temperature measurement of high-voltage switch equipment can be implemented; power grid accidents are reduced; a trip-out rate of a power grid is reduced; and reliable operation of the power grid is greatly improved.

An embodiment of the invention provides a temperature measurement method, electronic equipment and a storage medium. The method comprises the following steps of: acquiring a target temperature measurement distance and initial infrared gray scale information of an object to be subjected to temperature measurement; determining a target compensation amount corresponding to the target temperature measurement distance according to a preset corresponding relation between a temperature measurement distance and an infrared gray information compensation amount; acquiring target infrared gray information of the object to be subjected to temperature measurement according to the initial infrared gray information and the target compensation amount; determining a target corresponding relationship matched with the environment temperature and the target temperature measurement distance of the environment where the object to be subjected to temperature measurement is located from a plurality of preset corresponding relationships between temperatures and infrared gray scale information; and acquiring the temperature corresponding to target infrared gray scale information according to the target corresponding relationship, and taking the temperature as the temperature of the object to be subjected to temperature measurement. Compared with the prior art, by applying the temperature measurement method provided by the embodiment of the invention, the influence of the environment temperature and the temperature measurement distance on the non-contact temperature measurement mode can be reduced, and the temperature measurement precision of the non-contact temperature measurement mode is improved.

The invention relates to a temperature measurement system and method. The temperature measurement system comprises temperature measurement equipment used for measuring the temperature of an object to be subjected to temperature measurement and flow guide equipment; the flow guide equipment comprises a flow guide channel; the flow guide channel comprises a first channel area and a second channel area; the object to be subjected to temperature measurement can move from the first channel area to the second channel area, and can change the direction of movement along the second channel area; and the temperature measuring equipment is arranged towards the second channel area, so that the temperature measuring area of the temperature measuring equipment at least partially covers the second channel area, and therefore, the influence of people gathering on the body temperature of a measured person is reduced, and the temperature measuring error of the measured person is reduced.

The invention provides a reaction cavity, semiconductor processing equipment and a base temperature control method. The reaction cavity comprises a cavity body, a base and a preheating ring, wherein the preheating ring is connected with the inner circumferential wall of the cavity body and surrounds the periphery of the base, the reaction cavity further comprises a temperature measuring assembly, the temperature measuring assembly comprises an arc-shaped detection pipe and a temperature measuring element arranged in the arc-shaped detection pipe, the arc-shaped detection pipe is arranged at the position, close to the inner circumferential edge of the preheating ring, of the bottom of the preheating ring and extends in the circumferential direction of the base; one end of the detection pipe is provided with an extension part, and the extension part penetrates through the cavity body and extends to the outside of the cavity body; the temperature measuring element is used for detecting the temperature of a plurality of temperature measuring points which are distributed at intervals in the extension direction of the arc-shaped detection pipe, and is used as an edge temperature value of the base, and wires of the temperature measuring element are led out of the cavity body through the extension part. According to the reaction cavity, the semiconductor processing equipment and the base temperature control method, the temperature of the base is detected in real time in the process state of the cavity, and the cavity does not need to be opened and the temperature measuring assembly does not need to be dismantled before the formal process is started.