A high-temperature superconducting quantum voltage noise thermometer

Abstract

The present invention discloses a high-temperature superconducting quantum voltage noise thermometer, comprising a detector resistor, a high-temperature superconducting quantum voltage pseudo-noise source, a switch conversion circuit, two-way amplification and filtering circuits, and a data acquisition and processing circuit; the input end of the switch conversion circuit is electrically connected to the output end of the detector resistor and the high-temperature superconducting quantum voltage pseudo-noise source respectively, and the output end is electrically connected to the amplification and filtering circuit and the data acquisition and processing circuit in sequence; the data acquisition and processing circuit comprises two analog-to-digital converters and a cross-correlation data processing circuit, and the input end of each analog-to-digital converter is electrically connected to the output end of one amplification and filtering circuit. The present invention adopts a high-temperature superconducting quantum voltage noise source device based on a pulse-driven high-temperature superconducting Josephson array as a reference noise source, can work in a liquid nitrogen temperature zone, has low refrigeration cost, small size, short refrigeration time and low power consumption, and can realize temperature in-situ calibration under special environments.

Description

Technical Field

[0001] The invention relates to the technical field of temperature measurement, and in particular to a high-temperature superconducting quantum voltage noise thermometer. Background Art

[0002] Temperature is one of the seven basic physical quantities in the International System of Units. Accurate temperature measurement has wide applications in energy, metallurgy, manufacturing, electronic technology, medical care, national defense, aerospace, and scientific research.

[0003] Thermodynamic temperature Kelvin has been defined by the Boltzmann constant, and the primary thermometer must be able to directly trace the temperature to the Boltzmann constant. In industrial applications, precise temperature control is the cornerstone for many companies to ensure safe production and quality control. At present, companies with high requirements for precise temperature control usually install a large number of platinum resistors or thermocouples for real-time temperature monitoring. These traditional temperature sensors usually change their thermoelectric properties after working for a period of time due to surface oxidation, pollution, high-temperature recrystallization, etc., resulting in measurement errors. In order to ensure the accuracy of temperature measurement, these traditional temperature sensors must be calibrated periodically. However, in special fields such as nuclear energy, nuclear power, aerospace, etc., temperature sensors need to work continuously and are not convenient to disassemble for inspection, so high-precision in-situ calibration and traceability of temperature have become a problem. The quantum voltage noise thermometer uses a pulse-driven quantum voltage system to synthesize quantum pseudonoise, and uses this quantum pseudonoise to calibrate the thermal noise generated by the temperature measuring resistor at different temperatures, which can achieve high-accuracy primary temperature measurement.

[0004] Currently, noise thermometers based on quantum voltage noise sources use low-temperature superconducting Josephson junction arrays, such as Nb / Nb x Si 1-x / Nb Josephson junction, etc., can realize the Johnson noise method to measure the Boltzmann constant, with a relative uncertainty of 3×10 -6 , which contributed to the determination of the Boltzmann constant. However, the low-temperature superconducting quantum voltage noise thermometer operates at an extremely low temperature (liquid helium temperature zone), and the equipment is bulky, takes a long time to cool, is expensive, and consumes a lot of power, which is not conducive to the promotion and application of quantum voltage noise thermometers, and has not yet been used for in-situ temperature calibration and traceability under extreme conditions.

[0005] Based on this technical background, the present invention studies a high-temperature superconducting quantum voltage noise thermometer. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention proposes a high-temperature superconducting quantum voltage noise thermometer, which adopts a high-temperature superconducting quantum voltage noise source device based on a pulse-driven high-temperature superconducting Josephson array as a reference noise source. The device can operate in a high-temperature environment, has low refrigeration cost, small size, short refrigeration time and low power consumption, thus realizing the portability and desktop nature of the quantum voltage noise thermometer and promoting the in-situ temperature calibration and traceability application of the quantum voltage noise thermometer under extreme conditions.

[0007] In order to achieve the above-mentioned object, the present invention provides a high-temperature superconducting quantum voltage noise thermometer, comprising a detector resistor, a high-temperature superconducting quantum voltage pseudo-noise source, a two-way switch conversion circuit, an amplification and filtering circuit, and a data acquisition and processing circuit;

[0008] The input end of the switch conversion circuit is electrically connected to the detector resistor and the output end of the high-temperature superconducting quantum voltage pseudo-noise source respectively, and the output end is electrically connected to the two-way amplification and filtering circuit and the data acquisition and processing circuit in sequence;

[0009] Each amplifying and filtering circuit comprises a first amplifier, a first low-pass filter, a second amplifier and a second low-pass filter which are electrically connected in sequence;

[0010] The data acquisition and processing circuit includes two analog-to-digital converters and a cross-correlation data processing circuit, the input end of each analog-to-digital converter is electrically connected to the output end of an amplification and filtering circuit, and the output end is electrically connected to the cross-correlation data processing circuit;

[0011] The high-temperature superconducting quantum voltage pseudo-noise source is synthesized by using a Josephson junction array chip based on pulse driving.

[0012] The technical effects of the present invention include:

[0013] (1) The high-temperature superconducting quantum voltage noise thermometer proposed in the present invention adopts a high-temperature superconducting quantum voltage noise source device based on a pulse-driven high-temperature superconducting Josephson array as a reference noise source, which can work in a high-temperature environment, has low cooling cost, small size, short cooling time and low power consumption, thus realizing the portability and desktop nature of the quantum voltage noise thermometer and promoting the in-situ temperature calibration and traceability application of the quantum voltage noise thermometer under extreme conditions.

[0014] (2) The high-temperature superconducting quantum voltage noise thermometer proposed in the present invention has a data acquisition and processing circuit including two analog-to-digital converter inter-correlated data processing circuits connected to two amplification and filtering circuits. The voltage noise of the room temperature readout circuit can be reduced through analog-to-digital conversion and data inter-correlation processing, thereby making the voltage noise of the detector resistance noise source dominant.

[0015] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0017] Figure 1 This is a circuit topology diagram of the high-temperature superconducting quantum voltage noise thermometer proposed by the present invention.

[0018] Description of reference numerals:

[0019] 1-temperature measurement environment, 2-detector resistance, 3-high temperature environment, 4-high temperature superconducting quantum voltage pseudo-noise source, 5-switch conversion circuit, 6-amplification and filtering circuit, 7-data acquisition and processing circuit, 8-first amplifier, 9-first low-pass filter, 10-second amplifier, 11-second low-pass filter, 12-analog-to-digital converter, 13-cross-correlation data processing circuit. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein.

[0021] In the present invention, unless otherwise specified, the directional words used, such as "upper and lower", generally refer to the upper and lower parts of the device in normal use, and "inside and outside" refer to the outline of the device. In addition, the terms "first, second, third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first, second, third" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0022] The present invention provides a high-temperature superconducting quantum voltage noise thermometer, such as Figure 1 As shown, it includes a detector resistor 2, a high-temperature superconducting quantum voltage pseudo-noise source 4, a switch conversion circuit 5, a two-way amplification and filtering circuit 6, and a data acquisition and processing circuit 7;

[0023] The input end of the switch conversion circuit 5 is electrically connected to the detector resistor 2 and the output end of the high-temperature superconducting quantum voltage pseudo-noise source 4 respectively, and the output end is electrically connected to the two-way amplification and filtering circuit 6 and the data acquisition and processing circuit 7 in sequence;

[0024] Each amplifying and filtering circuit 6 comprises a first amplifier 8, a first low-pass filter 9, a second amplifier 10 and a second low-pass filter 11 which are electrically connected in sequence;

[0025] The data acquisition and processing circuit 7 includes two analog-to-digital converters 12 and an inter-correlation data processing circuit 13. The input end of each analog-to-digital converter 12 is electrically connected to the output end of one amplification and filtering circuit 6, and the output end is electrically connected to the inter-correlation data processing circuit 13.

[0026] High temperature superconducting quantum voltage pseudonoise source is synthesized using a pulse driven Josephson junction array chip4.

[0027] In the present invention, a high-temperature superconducting quantum voltage noise source device based on a pulse-driven high-temperature superconducting Josephson array is used as a reference noise source, which can work in a high-temperature environment, has low refrigeration cost, small size, short refrigeration time and low power consumption, thereby realizing the portability and desktop nature of the quantum voltage noise thermometer, and promoting the in-situ temperature calibration and traceability application of the quantum voltage noise thermometer under extreme conditions.

[0028] According to the present invention, the Josephson junction array chip generates a Shapiro voltage step output quantum voltage pulse under microwave drive;

[0029] The high-temperature superconducting quantum voltage pseudo-noise source is in a high-temperature environment;

[0030] The temperature of the high temperature environment is greater than or equal to 40K;

[0031] The environment in which the detector resistor 2 works normally is its temperature measurement environment 1.

[0032] In the present invention, the high temperature environment 3 is a relatively high temperature relative to a low temperature environment below 40K. The high temperature superconducting quantum voltage pseudo-noise source of the present invention can also work in a low temperature environment.

[0033] According to the present invention, the number of Josephson junction array chips is 1-10 6 ;

[0034] The frequency of microwaves is 1-100 GHz;

[0035] The Josephson junction is a high-temperature superconducting Josephson junction based on yttrium barium copper oxide material.

[0036] In the present invention, the detector resistor 2 is used as the temperature noise source to be measured; the detector resistor 2 is made of gallium arsenide or graphene material; the detector resistor 2 remains unchanged in a wide range of strong magnetic fields and a wide range of low temperatures.

[0037] In the present invention, the high-temperature superconducting quantum voltage pseudo-noise source 4 uses a Josephson junction array chip to synthesize quantum voltage pseudo-noise; the Josephson junction array generates a Shapiro voltage step under microwave drive, so that the Josephson junction array outputs a quantum voltage pulse, and the quantum voltage pseudo-noise signal is synthesized using arbitrary waveform synthesis technology; the Josephson junction in the Josephson array can be a high-temperature superconducting Josephson junction based on materials such as yttrium barium copper oxide.

[0038] Preferably, the switch conversion circuit 5 is used to switch between the detector resistor 2 and the high temperature superconducting quantum voltage pseudo-noise source 4;

[0039] Each amplifying and filtering circuit 6 is used to read out, amplify and filter the noise signal of the detector resistor 2 or the noise signal of the high-temperature superconducting quantum voltage pseudo-noise source 4;

[0040] The data acquisition and processing circuit 7 is used to perform analog-to-digital conversion and data correlation processing on the received analog signal.

[0041] In the present invention, the data acquisition and processing circuit includes two analog-to-digital converter inter-correlated data processing circuits, and is connected to two-way amplification and filtering circuits. Through analog-to-digital conversion and data inter-correlation processing, the voltage noise of the room temperature readout circuit can be reduced, thereby making the voltage noise of the detector resistance noise source dominant.

[0042] In the present invention, the amplifying and filtering circuit 6 includes a first amplifier 8, a first low-pass filter 9, a second amplifier 10 and a second low-pass filter 11 which are electrically connected in sequence, which can reduce the voltage noise of the room temperature readout circuit, so that the voltage noise of the noise source of the detector resistor 2 is dominant.

[0043] According to the present invention, the formula used by the thermometer to measure temperature is:

[0044]

[0045] Where T is the thermodynamic temperature, is the noise power of the detector resistance to be measured, <V Q 2 > is the noise power of the high-temperature superconducting quantum voltage pseudonoise source, ΔM is the bandwidth of the quantum voltage noise thermometer measurement system, n is the number of Shapiro steps, m is the number of Josephson junction array chips, k b is the Boltzmann constant, e is the basic charge, f is the frequency of microwaves, h is the Planck constant, and R is the detector resistance.

[0046] According to the present invention, the formula used by the thermometer to measure temperature is derived from the noise power expression of the detector resistor 2 and the noise power expression of the high-temperature superconducting quantum voltage pseudo-noise source 4.

[0047] According to the present invention, the noise power expression of the detector resistor 2 is:

[0048]

[0049] In the present invention, the temperature measurement principle of the noise temperature measurement method is based on the Nyquist equation: in represents the noise power, k b is the Boltzmann constant, T is the thermodynamic temperature, R is the detector resistance, and ΔM is the bandwidth of the quantum voltage noise thermometer measurement system. By measuring the thermal noise power and resistance of the resistor within a certain bandwidth, the thermodynamic temperature of the environment in which the resistor detector is located can be obtained.

[0050] In the present invention, based on the detector resistor 2, the detector resistor 2 is used as the detector resistor, and a method of switching the measurement between the detector resistor 2 and the reference voltage noise source is adopted to eliminate the influence of the bandwidth of the measurement system.

[0051] According to the present invention, the noise power expression of the high-temperature superconducting quantum voltage pseudo-noise source is:

[0052] <V Q 2 >=nmK J -1 f;

[0053] Among them, K J is the Josephson constant.

[0054] In the present invention, the quantum voltage noise thermometer based on the detector resistor 2 uses a quantum voltage noise source as a reference voltage noise source to synthesize quantum voltage pseudonoise; the quantum voltage noise thermometer based on the detector resistor 2 uses a cross-correlation technique to reduce the noise signal of the room temperature readout circuit.

[0055] According to the present invention, the expression of the Josephson constant is:

[0056] K J =2e / h.

[0057] The present invention will be described in more detail below through specific embodiments.

[0058] Example 1

[0059] like Figure 1 As shown, this embodiment provides a high-temperature superconducting quantum voltage noise thermometer, including a detector resistor 2, a high-temperature superconducting quantum voltage pseudo-noise source 4, a switch conversion circuit 5, a two-way amplification and filtering circuit 6, and a data acquisition and processing circuit 7;

[0060] The input end of the switch conversion circuit 5 is electrically connected to the detector resistor 2 and the output end of the high-temperature superconducting quantum voltage pseudo-noise source 4 respectively, and the output end is electrically connected to the two-way amplification and filtering circuit 6 and the data acquisition and processing circuit 7 in sequence;

[0061] Each amplifying and filtering circuit 6 comprises a first amplifier 8, a first low-pass filter 9, a second amplifier 10 and a second low-pass filter 11 which are electrically connected in sequence;

[0062] The data acquisition and processing circuit 7 includes two analog-to-digital converters 12 and an inter-correlation data processing circuit 13. The input end of each analog-to-digital converter 12 is electrically connected to the output end of one amplification and filtering circuit 6, and the output end is electrically connected to the inter-correlation data processing circuit 13.

[0063] In this embodiment, the switch conversion circuit 5 is connected to the detector resistor 2 and the high temperature superconducting quantum voltage pseudo noise source 4 respectively;

[0064] Switching between the detector resistor 2 and the high temperature superconducting quantum voltage pseudo-noise source 4 through the switch conversion circuit 5;

[0065] The detector resistor 2 is placed in the temperature measurement environment 1;

[0066] The high-temperature superconducting quantum voltage pseudo-noise source 4 is in a high-temperature environment 3, and uses a Josephson junction array chip with about 1000 pieces based on yttrium barium copper oxide material to synthesize quantum voltage pseudo-noise. The Josephson junction array generates Shapiro voltage steps under microwave drive and outputs quantum voltage pulses under 70 GHz microwave drive, and uses arbitrary waveform synthesis technology to synthesize quantum voltage pseudo-noise.

[0067] In this embodiment, the temperature of the high temperature environment is 60K;

[0068] In this embodiment, the formula used by the thermometer to measure temperature is:

[0069]

[0070] Where T is the thermodynamic temperature, is the noise power of the detector resistance to be measured, <V Q 2 > is the noise power of the high-temperature superconducting quantum voltage pseudonoise source, ΔM is the bandwidth of the quantum voltage noise thermometer measurement system, n is the number of Shapiro steps, m is the number of Josephson junction array chips, k b is the Boltzmann constant, e is the basic charge, f is the frequency of microwaves, h is the Planck constant, and R is the detector resistance.

[0071] By using the parameters of this embodiment, the precise temperature value of the noise source to be measured can be measured at the original stage.

[0072] Example 2

[0073] like Figure 1 As shown, this embodiment provides a high-temperature superconducting quantum voltage noise thermometer, including a detector resistor 2, a high-temperature superconducting quantum voltage pseudo-noise source 4, a switch conversion circuit 5, a two-way amplification and filtering circuit 6, and a data acquisition and processing circuit 7;

[0074] The input end of the switch conversion circuit 5 is electrically connected to the detector resistor 2 and the output end of the high-temperature superconducting quantum voltage pseudo-noise source 4 respectively, and the output end is electrically connected to the two-way amplification and filtering circuit 6 and the data acquisition and processing circuit 7 in sequence;

[0075] Each amplifying and filtering circuit 6 comprises a first amplifier 8, a first low-pass filter 9, a second amplifier 10 and a second low-pass filter 11 which are electrically connected in sequence;

[0076] The data acquisition and processing circuit 7 includes two analog-to-digital converters 12 and an inter-correlation data processing circuit 13. The input end of each analog-to-digital converter 12 is electrically connected to the output end of one amplification and filtering circuit 6, and the output end is electrically connected to the inter-correlation data processing circuit 13.

[0077] In this embodiment, the switch conversion circuit 5 is connected to the detector resistor 2 and the high temperature superconducting quantum voltage pseudo noise source 4 respectively;

[0078] Switching between the detector resistor 2 and the high temperature superconducting quantum voltage pseudo-noise source 4 through the switch conversion circuit 5;

[0079] The detector resistor 2 is placed in the temperature measurement environment 1;

[0080] The high-temperature superconducting quantum voltage pseudo-noise source 4 is in a high-temperature environment 3, and uses a Josephson junction array chip with about 800 pieces based on yttrium barium copper oxide material to synthesize quantum voltage pseudo-noise. The Josephson junction array generates Shapiro voltage steps under microwave drive and outputs quantum voltage pulses under 75 GHz microwave drive, and uses arbitrary waveform synthesis technology to synthesize quantum voltage pseudo-noise.

[0081] In this embodiment, the temperature of the high temperature environment is 77K;

[0082] In this embodiment, the formula used by the thermometer to measure temperature is:

[0083]

[0084] Where T is the thermodynamic temperature, is the noise power of the detector resistance to be measured, <V Q 2> is the noise power of the high-temperature superconducting quantum voltage pseudonoise source, ΔM is the bandwidth of the quantum voltage noise thermometer measurement system, n is the number of Shapiro steps, m is the number of Josephson junction array chips, k b is the Boltzmann constant, e is the basic charge, f is the frequency of microwaves, h is the Planck constant, and R is the detector resistance.

[0085] By using the parameters of this embodiment, the precise temperature value of the noise source to be measured can be measured at the original stage.

[0086] Example 3

[0087] like Figure 1 As shown, this embodiment provides a high-temperature superconducting quantum voltage noise thermometer, including a detector resistor 2, a high-temperature superconducting quantum voltage pseudo-noise source 4, a switch conversion circuit 5, a two-way amplification and filtering circuit 6, and a data acquisition and processing circuit 7;

[0088] The input end of the switch conversion circuit 5 is electrically connected to the detector resistor 2 and the output end of the high-temperature superconducting quantum voltage pseudo-noise source 4 respectively, and the output end is electrically connected to the two-way amplification and filtering circuit 6 and the data acquisition and processing circuit 7 in sequence;

[0089] Each amplifying and filtering circuit 6 comprises a first amplifier 8, a first low-pass filter 9, a second amplifier 10 and a second low-pass filter 11 which are electrically connected in sequence;

[0090] The data acquisition and processing circuit 7 includes two analog-to-digital converters 12 and an inter-correlation data processing circuit 13. The input end of each analog-to-digital converter 12 is electrically connected to the output end of one amplification and filtering circuit 6, and the output end is electrically connected to the inter-correlation data processing circuit 13.

[0091] In this embodiment, the switch conversion circuit 5 is connected to the detector resistor 2 and the high temperature superconducting quantum voltage pseudo noise source 4 respectively;

[0092] Switching between the detector resistor 2 and the high temperature superconducting quantum voltage pseudo-noise source 4 through the switch conversion circuit 5;

[0093] The detector resistor 2 is placed in the temperature measurement environment 1;

[0094] The high-temperature superconducting quantum voltage pseudo-noise source 4 is in a high-temperature environment 3, and uses a Josephson junction array chip with about 1,500 pieces based on yttrium barium copper oxide material to synthesize quantum voltage pseudo-noise. The Josephson junction array generates Shapiro voltage steps under microwave drive and outputs quantum voltage pulses under 72 GHz microwave drive, and uses arbitrary waveform synthesis technology to synthesize quantum voltage pseudo-noise.

[0095] In this embodiment, the temperature of the high temperature environment is 100K;

[0096] In this embodiment, the formula used by the thermometer to measure temperature is:

[0097]

[0098] Where T is the thermodynamic temperature, is the noise power of the detector resistance to be measured, <V Q 2 > is the noise power of the high-temperature superconducting quantum voltage pseudonoise source, ΔM is the bandwidth of the quantum voltage noise thermometer measurement system, n is the number of Shapiro steps, m is the number of Josephson junction array chips, k b is the Boltzmann constant, e is the basic charge, f is the frequency of microwaves, h is the Planck constant, and R is the detector resistance.

[0099] By using the parameters of this embodiment, the precise temperature value of the noise source to be measured can be measured at the original stage.

[0100] The high-temperature superconducting quantum voltage noise thermometer in the embodiment of the present invention adopts a high-temperature superconducting quantum voltage noise source device based on a pulse-driven high-temperature superconducting Josephson array as a reference noise source, can operate in a high-temperature environment, has low refrigeration cost, small size, short refrigeration time and low power consumption, thereby realizing the portability and desktop nature of the quantum voltage noise thermometer and promoting the in-situ temperature calibration and traceability application of the quantum voltage noise thermometer under extreme conditions.

[0101] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A high-temperature superconducting quantum voltage noise thermometer, characterized in that: It includes detector resistance, high temperature superconducting quantum voltage pseudo noise source, switch conversion circuit, two-way amplification and filtering circuit, and data acquisition and processing circuit; The input end of the switch conversion circuit is electrically connected to the detector resistor and the output end of the high-temperature superconducting quantum voltage pseudo-noise source respectively, and the output end is electrically connected to the two-way amplification and filtering circuit and the data acquisition and processing circuit in sequence; Each amplifying and filtering circuit comprises a first amplifier, a first low-pass filter, a second amplifier and a second low-pass filter which are electrically connected in sequence; The data acquisition and processing circuit includes two analog-to-digital converters and a cross-correlation data processing circuit, the input end of each analog-to-digital converter is electrically connected to the output end of an amplification and filtering circuit, and the output end is electrically connected to the cross-correlation data processing circuit; The high temperature superconducting quantum voltage pseudo-noise source is synthesized by using a pulse-driven Josephson junction array chip; The Josephson junction array chip generates a Shapiro voltage step output quantum voltage pulse under microwave drive; The high temperature superconducting quantum voltage pseudo-noise source is in a high temperature environment; The temperature of the high temperature environment is greater than or equal to 40K; The environment in which the detector resistor works normally is its temperature measurement environment; The number of the Josephson junction array chips is 1-10 6 ; The frequency of the microwave is 1-100 GHz; The Josephson junction is a high temperature superconducting Josephson junction based on yttrium barium copper oxide material; The formula used for measuring temperature by the quantum voltage noise thermometer is: ； Where T is the thermodynamic temperature, < V T 2 > is the noise power of the detector resistance to be measured, < V Q 2 > is the noise power of the high-temperature superconducting quantum voltage pseudonoise source, is the bandwidth of the quantum voltage noise thermometer measurement system, n is the number of Shapiro steps, m is the number of Josephson junction array chips, k b is the Boltzmann constant, e is the elementary charge, f is the frequency of microwaves, h is Planck's constant, R is the detector resistance value.

2. The quantum voltage noise thermometer according to claim 1, characterized in that: The switch conversion circuit is used to switch between the detector resistance and the high temperature superconducting quantum voltage pseudo-noise source; Each amplifying and filtering circuit is used to read out, amplify and filter the noise signal of the detector resistor or the noise signal of the high-temperature superconducting quantum voltage pseudo-noise source; The data acquisition and processing circuit is used for performing analog-to-digital conversion and data correlation processing on the received analog signal.

3. The quantum voltage noise thermometer according to claim 1, characterized in that: The formula used for measuring temperature by the quantum voltage noise thermometer is derived from the noise power expression of the detector resistor and the noise power expression of the high-temperature superconducting quantum voltage pseudo-noise source.

4. The quantum voltage noise thermometer according to claim 3, characterized in that: The noise power expression of the detector resistance is: < V T 2 >=4 k b TR 。 5. The quantum voltage noise thermometer according to claim 4, characterized in that: The noise power expression of the high temperature superconducting quantum voltage pseudonoise source is: < V Q 2 >= K J -1 f ； in, K J is the Josephson constant.

6. The quantum voltage noise thermometer according to claim 5, characterized in that: The expression of the Josephson constant is: K J =2 e / h 。

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