37results about "Cryogenic temperature measurement" patented technology

An attenuator or dissipating element arranged to thermalize radio frequency or lower frequency signals, respectively, comprises: at least a first heat sink and a second heat sink (230, 231, 232, 233) that are capacitively grounded and arranged to provide heat dissipation via electron-phonon coupling; and at least one tunnel junction (220, 221, 222, 223, 224) coupled to the first heat sink and the second heat sink; wherein a combined resistance of the at least one tunnel junction and a heat sink coupled to it is below h / e 2; and / or a total capacitance of the first heat sink and the second heat sink, respectively, is above e 2 / 2 k b T, wherein h is the Planck constant, e is the elementary charge, k b is the Boltzmann constant, and T is the minimum operating temperature of the element. Preferably, an array (200) of N rows (204) and M columns (202) of non-superconducting metal-insulator-metal tunnel junctions is employed.

The application discloses a sealing degree detection device and detection method of a refrigerated display cabinet, and mechanical touch door switch detects the opening and closing conditions of the refrigerated cabinet door body; when the mechanical touch door switch cannot detect the closing signal of the refrigerated cabinet door body, a signal is sent to the controller, the controller sends a signal to the cloud platform, and it is determined that the door body is sunken or the cabinet is deformed; after the mechanical touch door switch detects that the refrigerated cabinet door body is closed, the temperature and air pressure in the cabinet are determined through the temperature sensor and the air pressure sensor in the cabinet; if the temperature and air pressure determination results both meet the set requirements, the refrigerated display cabinet is normal; if any determination result does not meet the set requirements, the controller sends a signal to the cloud platform, and it is determined that the sealing strip of the refrigerated cabinet door body does not meet the use requirements. The application can determine whether the sealing degree of the door body meets the expected requirements, and the warning is transmitted to the relevant after-sales department through the cloud platform for the refrigerated display cabinet that does not meet the requirements, thereby playing a preliminary discrimination role for after-sales, and improving the after-sales service quality.

The application relates to a temperature recording device for a cold chain and a temperature recording method thereof. The temperature recording device can be applied to the temperature recording of the fields of food, medicines and the like which need to be kept at low temperature for production, storage and transportation. The temperature recording device comprises a base, a transparent cover, a spiral bimetallic sheet, a central shaft, a shaft sleeve, a temperature pointer, a scale dial and a rotating dial. A one-way hook is arranged on the temperature pointer, a recording arrow and a clamping groove are arranged on the rotating dial, the central shaft is fixed in the center of the base, the shaft sleeve is sleeved on the central shaft and can rotate, the outer end of the spiral bimetallic sheet is connected to the inner wall of the base, the inner end of the spiral bimetallic sheet is connected to the shaft sleeve, the spiral bimetallic sheet is stretched and bent to drive the shaft sleeve to rotate when the temperature changes, the rotating dial is covered above the scale dial and can rotate, the shaft sleeve penetrates through the scale dial and the rotating dial, the lower end of the shaft sleeve is connected to the spiral bimetallic sheet, the upper end of the shaft sleeve is connected to the temperature pointer, the shaft sleeve drives the temperature pointer to rotate, and the transparent cover is covered on the upper portion of the base.

The broadband light source includes a confocal sensor assembly configured to measure a surface of a rotatable drum covered with a plasma formation target material. The broadband light source includes a laser source configured to direct pulsed illumination at the rotatable drum to excite the plasma formation target material and emit broadband light as the drum is angularly rotated and axially translated. The broadband light source includes a controller configured to direct the confocal sensor assembly to transmit a confocal light signal to the rotatable drum, record a calibrated measurement of the distance from the confocal sensor assembly to the rotatable drum, direct a cryogenic cooling subsystem to cryogenically cool the rotatable drum, record one or more distance measurements from the sensor head to the rotatable drum, convert the distance measurements to temperature values, and determine whether a target process condition temperature has been achieved.

According to an aspect, there is provided a Coulomb blockade thermometer comprising an input electrode; an output electrode; and a sensor component coupled in-between the input and output electrodes. The sensor component comprises: an array of tunnel junctions comprising at least one row of tunnel junctions, a first heat sink and a second heat sink. The tunnel junctions of the array comprise an insulating layer forming a tunnel barrier between two electrically conducting volumes which are characterized by an absence of superconductivity. The absence of superconductivity in the two electrically conducting volumes is achieved by using titanium tungsten layers or scandium layers. The at least one row comprises a first tunnel junction, a second tunnel junction and a third tunnel junction. The first heat sink is coupled to the first and second tunnel junctions. The second heat sink is coupled to the second and third tunnel junctions. The first heat sink and the second heat sink are arranged to provide heat dissipation via electron-phonon coupling.

The invention relates to an installation for measuring the temperature of an external wall of a pipe, the device comprising: a pipe configured to allow the circulation of a fluid; a heat-to-thermoelectricity conversion device, configured to generate a potential difference when there is a temperature difference between an external wall of the pipe and the ambient air; an electronic circuit electrically connected to the heat-to-thermoelectricity conversion device, being configured to extract electrical energy from the potential difference and being configured to measure the temperature of the external wall of the pipe.

The invention discloses a sensor system capable of improving sampling precision and a refrigerator, the sensor system capable of improving the sampling precision comprises a plurality of sensors capable of jointly collecting the same to-be-measured parameter, the sampling precision of all the sensors is the same, and the sampling ranges of all the sensors are different from one another. The sampling range of at least one sensor is within the sampling range of the other sensor, and the sensor system is matched with the range of to-be-measured parameters to select the sensor with the corresponding sampling range for acquisition. Compared with the prior art, on the basis that the sampling cost is not increased, the sampling precision can be improved, and the technical problem caused by too large sampling errors is avoided.

The present specification describes a cryogenic temperature sensor comprising: a sample of superconductor material; a current source configured to pass a current through the sample of superconductor material; and a voltage sensor configured to sense a voltage across the superconductor material sample. The temperature sensor further comprises a control unit configured to: control the current source to vary the current through the sample of superconductor material over time while the voltage sensor senses the voltage across the sample of superconductor material; detecting a change in the sensing voltage; and calculating the temperature of the superconductor material sample based on the detected current value at which the sensed voltage changes.

A current sensing noise thermometer comprising: a sensor resistor thermally coupled to a target to be measured; a superconducting coil; superconducting thermal breaks between respective ends of the sensor resistor and respective ends of the superconducting coil; and a superconducting flux sensor; wherein the sensor resistor, superconducting coil and superconducting thermal breaks form a loop inductively coupled to the superconducting flux sensor. There may be a noise filter between the sensor resistor and the superconducting coil.

According to an aspect, there is provided a Coulomb blockade thermometer comprising an input electrode; an output electrode; and a sensor component coupled in-between the input and output electrodes. The sensor component comprises: an array of tunnel junctions comprising at least one row of tunnel junctions, a first heat sink and a second heat sink. The tunnel junctions of the array comprise an insulating layer forming a tunnel barrier between two electrically conducting volumes which are characterized by an absence of superconductivity. The absence of superconductivity in the two electrically conducting volumes is achieved by using titanium tungsten layers or scandium layers. The at least one row comprises a first tunnel junction, a second tunnel junction and a third tunnel junction. The first heat sink is coupled to the first and second tunnel junctions. The second heat sink is coupled to the second and third tunnel junctions. The first heat sink and the second heat sink are arranged to provide heat dissipation via electron-phonon coupling.

The present invention provides a method to calibrate sensors and use of such sensors. In particular, the method of calibrating sensors can be carried out using ablation. The present invention also provides a method of generating a sensor by a direct electrical and / or mechanical attachment of surface-mount technology and surface mount devices to bonded, flexible, multiconductor ribbon cable.

A temperature integrity sensor or more precisely a temperature continuity sensor of a product which needs to be kept at a temperature below its degradation temperature, is provided. The product includes a refrigerated or frozen edible product; a pharmaceutical product such as a vaccine, or an antibiotic; or a biological-medical product such as a sample of a body fluid or tissue, or an organ. The sensor is based on RFID technology, in particular passive RFID technology.

The present specification describes a quantum computing system comprising a superconducting material sample, a cryogenic temperature sensor including a current source configured to pass a current through the superconducting material sample, and a voltage sensor configured to sense a voltage across the superconducting material sample, and a control unit including: controlling the current source to time-vary a current through the superconducting material sample while the voltage sensor senses a voltage across the superconducting material sample; detecting the change in the sensed voltage; and calculating a temperature of the superconducting material sample based on the value of the current upon detection of the change in the sensed voltage.

Diamond sensors for temperature and radiation measurement and helmet for real-time temperature and radiation detection The disclosure relates to a manufacturing process of temperature sensors with detection properties through thermal conduction and electromagnetic radiation. These temperature sensors are NTC (negative temperature coefficient) thermistors that are based on diamond films on flat semiconductor and ceramic substrates. These sensors comprise a diamond surface that is sensitive to temperature and radiation, on one of the substrate surfaces, whether or not protected by a non-temperature-sensitive diamond surface and metal carbide ohmic contacts on the other surface of the substrate. The disclosure also relates to personal protective equipment (PPE) comprising the temperature and infrared radiation detection system for integration into helmets with sensors with high durability and small size, aimed at preventing injuries to professionals from exposure to extreme conditions. The sensors comprising this detection system consist of a layer of polycrystalline boron-doped diamond overlaid by a layer of non-boron-doped polycrystalline diamond.

Circuits and methods related to temperature sensing of regions within a superconducting integrated circuit (IC) using in-situ resonators are described. An example relates to a superconducting IC including a first resonator having a first spatial location in relation to a floor plan of the superconducting IC. The superconducting IC further includes a second resonator having a second spatial location in relation to the floor plan of the superconducting IC. The superconducting IC further includes a feed line configured to provide a test signal to each of the first resonator and the second resonator in order to elicit a frequency response from the first resonator or the second resonator, where the frequency response is correlated with a first region within the superconducting IC corresponding to the first spatial location or with a second region within the superconducting IC corresponding to the second spatial location.

Aspects of the technology provide a method / system of sensing a change in temperature and / or strain in an optical fibre comprising a substantially continuous or quasi-continuous fibre Bragg grating. A difference spectrum is determined between a reference reflected spectrum of the fibre Bragg grating and a monitored reflected spectrum. The difference spectrum is analysed to determine whether the optical fibre is experiencing a change of type a)—a temperature increase or an extension—or of type b)—a temperature decrease or a contraction. The technology may be applied to sensing a change in temperature and / or strain in a superconductor or detecting a risk of a quench in a superconductor.

The invention discloses a low-temperature temperature sensor mounting device which comprises a temperature sensor, a device base, a heat sink column and a device shell. The temperature sensor and the heat sink column are fixedly installed on the device base, and the device shell is fixed to the device base and surrounds the temperature sensor and the heat sink column to form a protection structure for the temperature sensor. An electric signal lead of the temperature sensor is fixed to the heat sink column in any one mode of winding, gluing, clamping or magnetic force, and then is led out of the low-temperature temperature sensor installation device through a reserved gap formed by the device shell and the device base. And the temperature sensor is connected to a signal generating or processing device matched with the temperature sensor so as to read the temperature value of the measured piece. The temperature sensor has the remarkable advantages of being flexible in installation mode, adaptive to sensors of different specifications, high in temperature measurement accuracy, reliable in sensor protection and the like, and an efficient solution is provided for stable installation and accurate temperature measurement of the temperature sensor in the low-temperature environment.

This specification describes a cryogenic temperature sensor is comprising: a superconductor material sample; a current source configured to pass a current through the superconductor material sample; and a voltage sensor configured to sense a voltage across the superconductor material sample. The temperature sensor further comprises a control unit configured to: control the current source to time-vary the current through the superconductor material sample while the voltage sensor senses the voltage across the superconductor material sample; detect a change in the sensed voltage; and compute the temperature of the superconductor material sample based on the value of the current at the time of the detected change in the sensed voltage.

The invention belongs to the technical field of casting molds, discloses the technical field of temperature measurement, and particularly relates to a thermometer for measuring temperature under extreme conditions, which is composed of a sapphire substrate, a gold-germanium alloy film thermometer main body, a gold electrode and a gold wire. The gold-germanium film low-temperature thermometer has the advantages of high sensitivity, fast thermal response, large working temperature range, good thermal cycle repeatability, small magnetoresistance and the like, and can be widely applied to extreme environments such as low temperature / ultralow temperature and strong magnetic fields.

The invention relates to a method for determining the temperature in the environment of an assembly comprising at least one passive component (6), the passive component being integrated into a single-layer or multi-layer assembly (22), comprising the steps of: - determining the geometric inductance of the passive component (6), from the dimensions of the passive component (6); - measuring the inductance of the passive component (6), called the total inductance, the passive component (6) being used in a temperature range such that it is in a superconducting state; - determining the kinetic inductance of the passive component (6), from the total inductance and the geometric inductance; - determining the temperature from the kinetic inductance of the component. Figure for the abstract: Fig. 2

A device for controlling trapped ions includes a substrate. An electrode structure is mounted on the substrate. The electrode structure includes DC electrodes and RF electrodes of an ion trap configured to trap ions in a space above the substrate. A temperature sensor is disposed at the substrate and configured to sense temperatures below 50K.

A broadband light source includes a confocal sensor assembly configured to measure a surface of a rotatable drum coated with plasma-forming target material. The broadband light source includes a laser source configured to direct pulsed illumination to the rotatable drum for exciting the plasma-forming target material and emitting broadband light as the drum is rotated in an angular direction and translated in an axial direction. The broadband light source includes a controller configured to direct the confocal sensor assembly to transmit a confocal optical signal to the rotatable drum, record a calibration measurement of a distance from the confocal sensor assembly to the rotatable drum, direct a cryogenic cooling sub-system to cryogenically cool the rotatable drum, record one or more distance measurements from a sensor head to the rotatable drum, convert the distance measurements to temperature values, and determine whether a target process condition temperature is achieved.

The invention discloses an extremely low temperature measurement method and system based on pulse phase interleaving and a storage medium, and relates to the technical field of temperature measurement, and the extremely low temperature measurement method comprises the following steps: S1, carrying out the calibration and mismatch correction of two sampling channels of a measurement system, obtaining a zero bias voltage, a system gain difference and a sampling time sequence offset, the measured voltage is compensated according to the zero bias voltage and the system gain difference; s2, parameters of a measurement system are set; s3, pulse phase configuration is carried out, so that a pulse constant current source module of the measurement system outputs two paths of pulses with the same amplitude and staggered phases; s4, synchronizing a sampling time sequence, synchronizing a sampling point of each sampling channel to a stable platform area of the pulse, and avoiding an edge area of the pulse; and S5, carrying out unbiased weighted average on the sampling values of the two sampling channels, and obtaining the measured temperature according to the resistance-temperature curve. According to the invention, errors caused by thermal noise in the measurement process are reduced, and the measurement precision is improved.

Disclosed is a monitoring device capable of measuring temperature in a low-temperature environment. The monitoring device comprises: a first cover arranged on an object to be diagnosed and having a plurality of grooves formed in the top surface thereof; a circuit board partially inserted into the grooves; and electronic elements arranged on the circuit board. Here, a heat blocking layer that blocks heat transferred from the object being diagnosed to a specific electronic element is arranged inside a groove into which a portion of the circuit board where the specific electronic element is located is inserted, the circuit board is arranged on the heat blocking layer, and the specific electronic element operates normally even in a sub-zero state due to the heat blocking layer.

The invention discloses a low-temperature Coriolis mass flowmeter temperature monitoring system based on fiber grating sensing, and relates to the field of low-temperature flow measurement. Comprising the following steps: signal acquisition and multi-band decomposition: acquiring wavelength drift and vibration acceleration signals and performing frequency domain segmentation; the thermal vibration coupling feature extraction module is used for calculating a coupling energy operator and generating an entropy change modulation factor; the thermal vibration entanglement generation module is used for fusing the characteristics of each frequency band to obtain the thermal vibration entanglement; the multi-state manifold recognition and construction module is used for dividing states according to the thermal vibration entanglement degree and extracting statistical characteristics to construct a temperature manifold; the ice entropy projection temperature estimation module is used for correcting the temperature projection value to obtain real temperature change; and the quantum tunneling phase compensation module is used for constructing a compensation model based on the temperature change and obtaining a net phase difference. By constructing a thermal vibration coupling model and introducing a thermal vibration entanglement index and a quantum tunneling compensation mechanism, the interaction between temperature disturbance and structural vibration is quantified, and the stability and accuracy of phase measurement in a low-temperature environment are improved.

The invention relates to a method for determining the temperature in the environment of an assembly comprising at least one passive component (6), the passive component being integrated into a single-layer or multi-layer assembly (22), comprising the steps of: - determining the geometric inductance of the passive component (6), from the dimensions of the passive component (6); - measuring the inductance of the passive component (6), called the total inductance, the passive component (6) being used in a temperature range such that it is in a superconducting state; - determining the kinetic inductance of the passive component (6), from the total inductance and the geometric inductance; - determining the temperature from the kinetic inductance of the component. Figure for the abstract: Fig. 2

A broadband light source includes a confocal sensor assembly configured to measure a surface of a rotatable drum coated with plasma-forming target material. The broadband light source includes a laser source configured to direct pulsed illumination to the rotatable drum for exciting the plasma-forming target material and emitting broadband light as the drum is rotated in an angular direction and translated in an axial direction. The broadband light source includes a controller configured to direct the confocal sensor assembly to transmit a confocal optical signal to the rotatable drum, record a calibration measurement of a distance from the confocal sensor assembly to the rotatable drum, direct a cryogenic cooling sub-system to cryogenically cool the rotatable drum, record one or more distance measurements from a sensor head to the rotatable drum, convert the distance measurements to temperature values, and determine whether a target process condition temperature is achieved.

A process variable transmitter for sensing a cryogenic temperature in an industrial process includes a cryogenic temperature sensor configured to be thermally coupled to an industrial process. The cryogenic temperature sensor has an electrical resistance which changes in response to changes in a cryogenic temperature and the industrial process is at the cryogenic temperature. Resistance measurement circuitry is electrically coupled to the cryogenic temperature sensor and measures a sensor resistance over a resistance range and responsively provides an output related to temperature based upon the measured resistance. Transmitter output circuitry coupled to the measurement circuitry to transmits information related to the cryogenic temperature to a remote location. The cryogenic temperature sensor comprises a polycrystalline silicon sensor including a dopant such that the cryogenic temperature sensor has an electrical resistance which changes over a cryogenic temperature range which is within the sensor resistance range of the measurement circuitry.

The application discloses a kind of artificial freezing construction ice lens thickness in-situ continuous monitoring method and system, belong to artificial freezing construction technical field, in the freezing construction area, determine the freezing range, then set multiple to be detected routes in freezing range, measure temperature on each to be detected route, record temperature change data with time, the movement rate of 0 ℃ freezing front along to be detected line can be calculated from to be detected route, the ice lens predicted thickness of each position on to be detected route is calculated by substituting the movement rate of freezing front into empirical model formula;Through the continuous, in-situ monitoring of temperature on to be detected route, the thickness of ice lens in freezing construction area can be predicted in real time, and then provide reference for the adjustment of freezing temperature, freezing mode and the like in artificial freezing construction process.

A process variable transmitter for sensing a cryogenic temperature in an industrial process includes a cryogenic temperature sensor configured to be thermally coupled to an industrial process. The cryogenic temperature sensor has an electrical resistance which changes in response to changes in a cryogenic temperature and the industrial process is at the cryogenic temperature. Resistance measurement circuitry is electrically coupled to the cryogenic temperature sensor and measures a sensor resistance over a resistance range and responsively provides an output related to temperature based upon the measured resistance. Transmitter output circuitry coupled to the measurement circuitry to transmits information related to the cryogenic temperature to a remote location. The cryogenic temperature sensor comprises a polycrystalline silicon sensor including a dopant such that the cryogenic temperature sensor has an electrical resistance which changes over a cryogenic temperature range which is within the sensor resistance range of the measurement circuitry.