60results about How to "High temperature resolution" patented technology

The invention discloses a wide spectrum and multi-channel imaging optical system based on the middle image off-axis three-mirror technique. The wide spectrum and multi-channel imaging optical system based on the middle image off-axis three-mirror technique comprises a visible channel and an infrared channel, wherein a light beam within the view field of the visible channel enters an optical system and then is reflected by an off-axis three-mirror primary mirror and an off-axis three-mirror secondary mirror to reach a third mirror in the visible channel, and after the exit pupil of the visible channel is filled with the reflected light beam, an image is formed at the position of the focus plane of the visible channel; a light beam within the view field of the infrared channel enters a third mirror in the infrared channel after being reflected by the off-axis three-mirror primary mirror and the off-axis three-mirror secondary mirror, the light beam reaches an intermediate-wave-and-long-wave color separation filter, a light beam in the intermediate wave view field is reflected through the front surface of the color separation filter, and an image is formed on the focus plane of an intermediate wave after the reflected light beam penetrates through an intermediate wave combined optical filter; a light beam in the long wave view field perpetrates through the intermediate-wave-and-long-wave color separation filter and then penetrates through a long wave combined optical filter, and then an image is formed on the focus plane of a long wave. The wide spectrum and multi-channel imaging optical system based on the middle image off-axis three-mirror technique has the advantages of being simple in structural mode, compact in structure, small in size, low in weight, large in number of spectrums, wide in spectrum section range, and capable of achieving wide-range, all-weather and high resolution dynamic monitoring.

The invention discloses a detection system for improving the stability of a high sensitivity terahertz mixer, which comprises a terahertz frequency band local oscillator signal source, a beam splitter, a silicon lens, a mixer, a coaxial three-way joint, a direct current blocker, an isolator, a low-temperature low-noise amplifier, a normal temperature intermediate-frequency amplifier, a band-pass filter, a device for converting an intermediate frequency power into a direct current voltage, a computer, a direct current bias power supply, a bias deice, a microwave source and a low temperature dewar. The invention also discloses a detection method for improving the stability of the high sensitivity terahertz mixer. In the invention, a feedback circuit is used to control a microwave power further lower than a terahertz power so as to compensate the instability of a terahertz local oscillator power; and by taking the HEB (Hot Electron Bolometer) mixer as an example, the Allen time of the mixer is prolonged to about 10 seconds from about 1 second and the temperature resolution is improved by 30 percent.

The invention relates to a fiber array dynamic infrared scene generation apparatus based on a MEMS technology and belongs to a dynamic infrared scene generation technology field. By using the apparatus of the invention, conversion from a visible light image to an infrared image can be realized. Purposes of greatly increasing a performance index of the dynamic infrared image generation apparatus and reducing cost can be reached. The apparatus comprises: a substrate, a fiber array formed by pixel columns and a visible light absorption infrared radiation layer of a pixel column top. A substrate material can use transparent glasses or silicon according to different optical path designs. The fiber array is made on the substrate by using a MEMS technology. The pixel columns forming the fiber array are mutually independent and can be taken as an imaging unit. A visible light absorption infrared radiation film is made on the each pixel column top. The visible light absorption infrared radiation film absorbs energy of the incident visible light image, radiates outwards the infrared light after the temperature is increased and generates the infrared image corresponding to the visible light image.

The invention discloses a real-time compensation method of non-uniformity correction residual errors of an infrared focal plane array (IRFPA) detector. The method introduces weighted uniform background correction residual errors to compensate the calibration errors of an actual scene aiming to requirements on residual error inhibition by correction output of non-uniformity responses of the IRFPA detector; and radiation source calibration is combined with a residual error cancellation method, so as to inhibit the residual non-uniformity of the IRFPA detector, effectively reduce the deviation between a calibrated response value and an actual scene radiation value, and improve a temperature resolution ratio of the IRFPA detector.

The invention relates to a photoelectronic device for a distributed optical fiber temperature sensor, which belongs to the technical field of optical fiber sensing. The device comprises a first collimator tail optical fiber and a second collimator tail optical fiber. Wavelength division multiplexing filters are arranged on transmission light paths of a first collimator and a second collimator respectively. Band pass filters are arranged on light paths of the two wavelength division multiplexing filters respectively. A first self-focusing lens and a second self-focusing lens are arranged on the transmission light paths of the two band pass filters. A first avalanche photodiode, a second avalanche photodiode and temperature probes are arranged at the focuses of the two self-focusing lenses respectively. The distributed optical fiber temperature sensor utilizing the photoelectronic device can conveniently acquire accurate temperature information, and improves the temperature resolution of a system.

The invention discloses a non-contact solid burning rate testing method. A burning detection part comprises an ignition device, a test piece burning carrying plate and a detection sensing area, wherein the ignition device comprises a solid igniter and a gas igniter; the test piece burning carrying plate is an impermeable non-burning flat plate with a low heat conducting coefficient; the detection sensing area comprises a light shielding cover, a light guide post and a light-sensitive sensor; the light-sensitive sensor is arranged in the light shielding cover; the light guide post is arranged in a fixing hole in the outer side of the light shielding cover, is over against the sensing window of the light-sensitive sensor and is vertical to a flame spreading direction. In the testing method, the conventional thermocouple is replaced by the light-sensitive sensor, and the light signal conduction range is controlled in combination with the structure of the light guide post, so that non-contact measurement of the solid burning rate is realized, the influence on the test piece burning state is avoided, burning distance errors are reduced, and the measuring accuracy is improved.

The invention discloses a bilateral total variation regularization correction method for the non-uniform response of an IRFPA detector. The method is characterized in that according to requirements of correction output of the non-uniform response of the IRFPA detector for artifact inhibition and detail maintaining, a bilateral total variation regularization term is led into an energy functional in cooperation with a correction parameter regression estimation method, diffusion properties of the bilateral total variation anisotropy are fully utilized, the artifact effect of response output after correction is effectively reduced, and detail information in an original scene is maintained better, so the temperature resolution of the IRFPA detector is effectively promoted.

The invention discloses a flexible electronic pressure sensor and a preparation method thereof. The flexible electronic pressure sensor comprises multiple pressure sensing units; each pressure sensingunit is composed of two substrates, two electrodes oppositely arranged between the two substrates and a compound pressure sensing membrane arranged between the two electrodes; the surface of each substrate is provided with a lotus-shaped micro pattern subjected to micro pattern treatment, and the substrates have flexible and retractable characteristics; the compound pressure sensing membrane is composed of multiple polyaniline hollow nanometer balls and multi-wall carbon nanometer pipes used for connecting adjacent polyaniline hollow nanometer balls; each pressure sensing unit utilizes a plasma treatment machine and adopts an electrode pixel treatment mode to form sensor arrays with set areas; the compound pressure sensing membrane has excellent elasticity capability and the ultra-low elasticity modulus, can achieve effective amplification and conversion of various kinds of exterior stimulation and is great in pressure sensing performance and high in temperature resolution; additionally, each pressure sensing unit can easily integrate the sensor arrays.

The invention discloses an infrared thermal imaging air tightness tester, comprising a test module, a control module, a thermal imaging module, a moving module, a data processing module and a tester frame; the tester frame comprises a bottom plate, a support frame and an upper seal plate; a foot pad is arranged on the side, close to the ground, of the bottom plate, one end of the foot pad is fixed on the bottom plate, and a rubber pad is arranged at the other end of the foot pad. The invention provides an infrared thermal imaging air tightness tester, which has high safety coefficient and can be monitored in real time.

The invention provides a rotating piece temperature measuring device and method based on a thermochromic liquid crystal. A photographing device captures a thermochromatic liquid crystal film arrangedon the surface of a rotating member through the derotator, a signal processing device analyzes a static thermochromatic liquid crystal spectrum obtained by the photographing device and outputs rotating member surface temperature field data, and the visualization process of the rotating member surface temperature field is achieved. The device comprises a main shaft, a support bearing, a rotating member, the thermochromatic liquid crystal film, the derotator, the photographing device, the signal processing device, a heating device, a motor and a transmission device. Non-contact measurement is adopted, the structure and flow field properties of a test are not affected, high-resolution and continuous temperature field data can be outputted, the device and the method are suitable for the rotating member whose surface is a plane or a complex geometric curved surface, and at the same time, the device and the method have the advantages of a fast reaction speed, good display characteristics, high spatial resolution and reusability.

The invention relates to a thermometer based on TPoS resonators and a temperature measurement method thereof. The present temperature measurement system based on the quartz crystal sensor has low stability and large sensor size. The thermometer comprises two TPoS resonators, three operational amplifiers, a frequency mixer, a low-pass filter, a frequency-voltage converter and a load resistor. Different frequency-temperature characteristic curves are presented by two TPoS resonators of different crystal orientations, and the frequency is identical under the calibration temperature. When the temperature changes, the two TPoS resonators have frequency difference, and the variance of the temperature is obtained according to the frequency difference so as to realize temperature measurement. The advantages of the thermometer are that the work frequency of the TPoS resonators can be hundreds of MHz so as to have higher temperature resolution. Besides, the two resonators are adjacent in position and can be integrated with the peripheral circuit through a PCB circuit or a single chip so that the overall area is smaller and the temperature consistency is higher.

The invention discloses a measuring device and method for a phase interface of a composite phase change material melting/solidifying process based on a thermochromic liquid crystal. The device is applied to the field of thermal storage of a composite phase change material with high thermal conductivity and is composed of a hot end, a cold end, a testing main body and a data acquisition system, wherein the testing main body is internally provided with a thermal storage cavity, a thermochromic liquid crystal layer, an isolation layer and a vacuum glass layer. The visualized measurement of the wall surface temperature of the thermal storage cavity and a solid liquid interface of the composite phase change material is realized by utilizing the characteristics of reversible thermochromism, hightemperature resolution, high spatial resolution and high response speed of the thermochromic liquid crystal layer; by utilizing the isolation layer, the response speed of the thermochromic liquid crystal is increased, and influences to thermal transfer in a thermal storage body are reduced; the conflict between visualized measurement and device thermal insulation is solved by utilizing the vacuumglass layer; and the temperature of the hot end/the cold end is monitored by utilizing the data acquisition system. The measuring device and method are used for realizing the visualized measurement of a composite phase change material melting/solidifying phase interface and a temperature field change process while realizing thermal insulation and is conductive to the research of a thermal transfer process of the composite phase change material in a differential thermal square cavity.

A distributed sensing device for determining a physical quantity, the device comprising a measuring unit configured for measuring at least two signals correlated to the physical quantity by distributed sensing, and a determining unit configured for bringing the at least two signals into a first relation used to determine the physical quantity, performing a correction based on a second relation between the at least two signals, and determining the physical quantity based on the first relation under consideration of the correction.

The invention discloses a nuclear-irradiation-resistant reinforced high-temperature-resistant resonant quartz temperature sensor, and relates to the field of resonant temperature sensors and is composed of an integrated packaging part and a thermosensitive quartz resonator, the thermosensitive quartz resonator is located inside the integrated packaging part, and the integrated packaging part is composed of a Kovar alloy pipe cap and a Kovar alloy pipe seat, and tungsten copper layers are sputtered on the inner and outer surfaces of the Kovar alloy pipe cap; a surface shear vibration mode and fundamental wave working are adopted by the thermosensitive quartz resonator, m is equal to 0.76 n, m and n are the width and the length of an alloy film oscillation excitation area, the thermosensitive quartz resonator is composed of a first multi-layer special alloy film oscillation excitation area, a second multi-layer special alloy film oscillation excitation area, a first supporting piece, a second supporting piece, a resonance component, a first bus bar electrode and a second bus bar electrode. The quartz temperature sensor has the advantages that the distance between the thermosensitive resonator and the peripheral circuit can be larger than or equal to 5 m, and the quartz temperature sensor is wide in working temperature range, high in accuracy, excellent in linearity, good in long-term stability, high in nuclear radiation resistance and good in high temperature resistance.

The invention discloses a lithium battery temperature dynamic monitoring method based on OFDR. The method comprises the steps that: signal light returned by a distributed optical fiber network and reference light are subjected to beat frequency interference, so that beat frequency interference signals are generated, sensing optical fibers in the distributed optical fiber network are transversely or longitudinally arranged on the upper surface, the lower surface and the side face of a lithium battery assembly or buried between single lithium battery packs. the beat frequency interference signals are acquired, so that a reference spectrum is obtained; the strain or temperature of the transverse initial positions of the sensing optical fibers is changed, and beat frequency interference signals are acquired, so that a measurement spectrum is obtained; the reference spectrum and the measurement spectrum are processed, so that a Rayleigh scattering spectrum of the measurement light and the reference light is obtained, calculation is performed to obtain a cross-correlation peak deviation value of each position, on the basis of a strain or temperature frequency shift coefficient, a final position-strain or position-temperature curve graph is obtained, and coordinates of a strain or temperature sudden change position in the curve graph are recorded; and a two-dimensional temperature field of a lithium battery is drawn in real time in equal proportion, and the temperature of the lithium battery is dynamically monitored.

The invention discloses a liquid temperature sensing system based on an echo wall mode spherical optical micro-cavity, and the system employs the thermo-optical sensing combination of a micro-nano optical fiber, the echo wall mode spherical optical micro-cavity and isopropanol liquid. A thermo-optical sensing path that the refractive index of the isopropanol liquid is changed due to the change ofthe measured temperature so as to change or move or drift the resonance wavelength of the resonance peak of the micro-cavity is formed, the original high-quality factor characteristic of the echo wallmode optical micro-cavity can be reserved, the temperature sensing sensitivity can be improved, and the accurate measurement of the temperature is further realized.

An infrared imaging element comprising a plurality of pixel cells arranged one-dimensionally or two-dimensionally, characterized in that each pixel cell includes a thermal resistor composed of a strong correlation electron based material. An infrared imaging element having a high temperature revolving power as compared with a conventional one can thereby be provided.

The invention discloses a high-stability length expansion die quartz temperature sensor provided with non-contact electrodes and relates to the field of sensors. The sensor comprises a packaging bodyand a resonance component located in the packaging body, wherein the resonance component is made of a quantity crystal; and the resonance component is of an integrated structure and comprises a base with two I-shaped beams, a supporting frame, m comb pieces and n resonance arms, wherein the m comb pieces and the n resonance arms are located in the supporting frame, m and n are both positive integers, m is greater than n, and the quantity of the metal electrodes on the m comb pieces is 2n. A new structure of the multi-resonance-arm length expansion die quartz temperature sensor which is provided with the non-contact electrodes and can prevent and suppress leakage of resonance energy of the resonance arms is disclosed, a non-contact electrode structure which is made of a high-temperature-resistant and aging-resistant four-layer composite metal thin film is groped, therefore, the maximum working temperature can reach 300 DEG C or above, thermal hysteresis is lowered, and the long-term stability of the sensor is improved.

The invention discloses a special-shaped fork arm-adopted resonant quartz tuning fork temperature sensor, relates to the field of resonant quartz tuning fork temperature sensors, and aims at solving the problems of the existing quartz tuning fork temperature sensors. According to the special-shaped fork arm-adopted resonant quartz tuning fork temperature sensor, two fork arms of a quartz tuning fork thermosensitive resonator are connected with a base part through a connection part; the two fork arms and the base part are located on the same side or two sides of the connection part 31; an included angle is formed between the head ends of the two fork arms; the extension directions of the non-parallel fork arms make the overall azimuth errors become smaller. The crystal cut of the resonant quartz tuning fork thermosensitive resonator with the special-shaped fork arms is ZYtW(115+/-3 degrees)/(44+/-5 degrees). Through the superposition, the requirements for comprehensive errors of crystalprocess are not rigor. The special-shaped fork arm-adopted resonant quartz tuning fork temperature sensor is suitable for treatment monitoring of medical tumors, rectal thermometers for livestock, thermometers for family planning women, seismic precursor monitoring of seismic wells, and oil well annular temperature detection instruments.