A furnace temperature tracking recorder temperature parameter calibration device and calibration method

Abstract

The present application relates to the technical field of temperature measurement, and discloses a furnace temperature tracking recorder temperature parameter calibration device and a calibration method, which comprise a movable base and a thermostat arranged on the movable base, and one end of the movable base is provided with an instrument switching mechanism, the instrument switching mechanism comprises a first support and a second support movably arranged on the top of the movable base. The furnace temperature tracking recorder temperature parameter calibration device integrates the movable base with the instrument switching mechanism, arranges the instruments required in different calibration stages in groups, and automatically adjusts and switches the two groups of instruments relying on the instrument switching mechanism, so that manual carrying is not needed, the labor intensity is greatly reduced, equipment collision and damage are avoided, the operation complexity is reduced, the risk of wiring errors is reduced, the uncertainty error caused by manual carrying is avoided, and the efficiency of the calibration process and the consistency of the results are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of temperature measurement technology, and in particular to a temperature parameter calibration device and calibration method for a furnace temperature tracking recorder. Background Technology

[0002] The existing furnace temperature tracking recorder temperature parameter calibration mainly adopts the core mechanism of standard comparison and step-by-step calibration. It verifies the measurement accuracy of the recorder host and the entire link in stages. The calibration process requires instruments such as a temperature calibrator, a multi-point switch, a standard platinum resistance thermometer, a standard platinum-rhodium 10-platinum thermocouple, a constant temperature chamber, a constant temperature bath, a calibration furnace, a high-precision thermometer, and a freezing point thermostat. The specific process is as follows: First, the recorder is placed in a constant temperature chamber to stabilize the environment. The temperature calibrator inputs a standard signal to the host to calibrate the error in the signal processing stage. Then, the sensor to be calibrated and the standard sensor are placed in the standard temperature field of the constant temperature bath or calibration furnace. The data is compared with the high-precision thermometer to calibrate the acquisition error of the entire link. Its core principle is to use high-accuracy standard instruments to provide a reference value, compare it with the recorder's measurement value to quantify the error, and ensure that the calibration results meet the metrological specifications.

[0003] The main drawbacks of existing technologies are the dispersed instrument layout and cumbersome operation. All calibration-related instruments are placed independently without an integrated support structure. Different calibration stages require manual handling of heavy equipment such as temperature calibrators, multi-point switches, and constant temperature baths, which is not only labor-intensive but also prone to equipment collision damage, significantly reducing calibration efficiency. In addition, each instrument relies solely on its own heat dissipation vents or natural cooling. In calibration scenarios, instruments are densely placed, and some equipment is close to heat sources such as calibration furnaces, making it difficult for heat to dissipate quickly. This results in localized high temperatures in the calibration area. High-temperature environments can affect the operation of internal electronic components, causing parameter drift. Since calibration work requires extremely high precision, component drift directly affects the reference stability of the standard and the measurement accuracy of the recorder, further amplifying calibration errors and reducing data reliability. Summary of the Invention

[0004] The technical problem this invention aims to solve is that instruments are scattered and lack integrated support, requiring manual handling and repeated alignment during switching, and the wiring operation is cumbersome. This easily leads to errors due to manual intervention. At the same time, insufficient heat dissipation causes local high temperatures, resulting in parameter drift of electronic components, ultimately affecting the core requirement of high-precision calibration. To address this, we propose a temperature parameter calibration device and calibration method for a furnace temperature tracking recorder.

[0005] To achieve the above objectives, this application adopts the following technical solution: a furnace temperature tracking recorder temperature parameter calibration device, comprising a movable base and a constant temperature chamber disposed on the movable base, a furnace temperature tracking recorder placed inside the constant temperature chamber, a digital thermometer inserted into the test hole of the constant temperature chamber, an instrument switching mechanism disposed at one end of the movable base, the instrument switching mechanism comprising a first bracket and a second bracket movably disposed on the top of the movable base, a scanning switch, a temperature calibrator and an external compensation temperature sensor disposed at one end of the first bracket, a high-precision thermometer, a constant temperature bath and a standard thermometer disposed at one end of the second bracket, and a driving mechanism disposed on the movable base for driving the first bracket and the second bracket to rotate synchronously and in opposite directions around the constant temperature chamber; The instrument switching mechanism is equipped with an adaptive heat dissipation mechanism, which includes a cavity disposed inside the first support and the second support. The upper end of the first support and the second support is provided with a first through hole communicating with the cavity. An arc-shaped inner tube is installed on the inner side of the cavity near the first through hole. The side wall of the arc-shaped inner tube is uniformly provided with second through holes. A wind collector is installed on one end of the movable base. A fan is installed on the wind collector. An arc-shaped outer tube extending to the inner side of the cavity is movably passed through the first support and the second support. One end of the arc-shaped outer tube is movably sleeved on the outside of the arc-shaped inner tube, and the other end is connected to the wind collector.

[0006] Preferably, the driving mechanism includes an arc-shaped rack disposed on the opposite side of the lower end of the first bracket and the second bracket, a gear rotatably disposed on the upper end of the movable base that meshes with the two racks, and a driving source for driving the gear to rotate is mounted on the movable base.

[0007] Preferably, each of the first and second brackets has a mounting groove at one end of its top, which is used for the detachable installation of a temperature calibrator, a scanning switch, and a high-precision temperature measuring instrument.

[0008] Preferably, the bottom wall of the placement groove is provided with an arc-shaped support protrusion, and the side wall of the placement groove is provided with a notch, with a first through hole opened in the inner wall of the notch.

[0009] Preferably, the top of the movable base is provided with a protective cover for covering the first support and the second support, and one end of the protective cover is provided with an opening for the first support and the second support to enter and exit.

[0010] Preferably, protective doors are provided at both ends of the inner side of the opening at one end of the protective cover, a rotating shaft is provided on the inner wall of the opening, a rotating hole corresponding to the rotating shaft is installed on the protective door, the rotating shaft is rotatably arranged inside the rotating hole, and a torsion spring is sleeved on the outer side of the rotating shaft, one end of the torsion spring is fixed inside the rotating hole, and the other end is fixed on the outer wall of the rotating shaft.

[0011] Preferably, a dustproof mesh is provided at the opening of the second through hole.

[0012] Preferably, the end of the arc-shaped outer tube away from the air collecting hood is provided with a debris pushing block whose cross-sectional size is adapted to the cross-sectional size of the inner cavity of the cavity, and an opening for debris discharge is provided at the bottom of one end of the cavity, and a collection trough can be detachably installed in the opening.

[0013] Preferably, the top of the movable base is equipped with an arc-shaped guide rail corresponding to the first bracket and the second bracket, and the bottom of the first bracket and the second bracket are movably connected to the arc-shaped guide rail.

[0014] A method for calibrating temperature parameters of a furnace temperature tracking recorder includes the following steps: S1: Preparation before calibration: Place the furnace temperature tracking recorder into the constant temperature chamber, and at the same time, insert the temperature sensing end of the digital thermometer into the constant temperature chamber through the test hole on the constant temperature chamber. Then start the constant temperature chamber and set the specified operating temperature. S2: Input signal calibration: The drive mechanism controls the first and second supports to move in opposite directions. The scanning switch and temperature calibrator at one end of the first support move to the test hole of the constant temperature chamber. The scanning switch, temperature calibrator and furnace temperature tracking recorder are connected by wires. At the same time, the external compensation temperature sensor connected to the temperature calibrator is extended into the inside of the constant temperature chamber. S3: Calibration of the temperature sensor equipped with the furnace temperature tracking recorder: After the input signal is calibrated, the wire is removed. Then, the first and second supports are moved in opposite directions by the drive mechanism. One end of the constant temperature bath and the high-precision thermometer is moved to the side of the test hole of the constant temperature chamber. The scanning switch and the temperature calibrator are moved away. The standard thermometer connected to the high-precision thermometer and the temperature sensor on the furnace temperature tracking recorder are bundled together and placed in the constant temperature bath or calibration furnace. S4: After the temperature sensor equipped with the furnace temperature tracking recorder is calibrated, the wires are removed, and the drive mechanism drives the first and second supports to move in the opposite direction again, so that the constant temperature bath and the high-precision thermometer are moved away from the test hole of the constant temperature chamber, and then data processing is performed.

[0015] The technical effects and advantages of this invention are as follows: In this invention, an integrated mobile base is used in conjunction with an instrument switching mechanism to arrange the instruments required for different calibration stages in sets. The two sets of instruments are automatically adjusted and switched by the instrument switching mechanism, eliminating the need for manual handling, greatly reducing labor intensity and avoiding equipment collision damage. Although the wiring connection and the basic positioning of the instruments entering and leaving the constant temperature chamber still require manual operation, the instrument switching mechanism has a preset docking trajectory. The operator only needs simple assistance to complete the wiring and alignment without repeated adjustments. This reduces the complexity of operation, lowers the risk of wiring errors, and avoids the uncertainty errors caused by manual handling and alignment, effectively improving the efficiency of the calibration process and the consistency of the results.

[0016] In this invention, an adaptive heat dissipation mechanism is designed to be compatible with the two sets of instrument support components. The total airflow is stabilized through a shared air collection shroud. The heat dissipation intensity is automatically adjusted by the extension or retraction of the instruments: when the instruments are extended for operation, the number of corresponding second through holes increases synchronously, and the heat dissipation capacity is enhanced in a targeted manner, quickly removing the heat generated by each instrument during operation; when the instruments are retracted and idle, the number of second through holes decreases accordingly, and the heat dissipation capacity is adaptively reduced to avoid energy waste. Based on forced heat dissipation, this invention not only solves the problem of localized high temperatures caused by dense placement of instruments and proximity to heat sources in existing technologies, but also effectively suppresses parameter drift of electronic components caused by high temperatures, ensuring the reference stability of each instrument and the measurement accuracy of the recorder. This provides a reliable temperature environment for high-precision calibration work, while also taking into account heat dissipation efficiency and energy saving requirements. Attached Figure Description

[0017] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a structural diagram of the protective cover and movable base of the present invention in a disassembled state; Figure 3 This is a schematic diagram of the first support, the second support, and the movable base of the present invention in their disassembled state. Figure 4 This is a schematic diagram of the overall mating structure of the first and second supports of the present invention; Figure 5 This is a structural diagram of the first support, the arc-shaped outer tube, and the arc-shaped inner tube of the present invention in a disassembled state; Figure 6 For the present invention Figure 5 A structural diagram from the bottom perspective; Figure 7 This is a structural schematic diagram of the arc-shaped inner tube and arc-shaped outer tube of the present invention in their disassembled state; Figure 8 This is a structural diagram of one of the protective doors and protective covers of the present invention in a disassembled state with one end open.

[0018] Legend: 1. Movable base; 2. Fan; 3. Air collector hood; 4. Protective cover; 5. Protective door; 6. Constant temperature chamber; 7. Digital thermometer; 8. Furnace temperature tracking recorder; 9. First support; 10. Drive source; 11. Gear; 12. Arc-shaped outer tube; 13. Second support; 14. Constant temperature bath; 15. High-precision thermometer; 16. Standard thermometer; 17. Scanning switch; 18. Temperature calibrator; 19. External compensated temperature sensor; 20. Collection tank; 21. Placement tank; 22. Support protrusion; 23. Notch; 24. First through hole; 25. Arc-shaped inner tube; 26. Cavity; 27. Rack; 28. Push block; 29. ​​Second through hole; 30. Rotating shaft; 31. Rotating hole; 32. Torsion spring. Detailed Implementation

[0019] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0020] Reference Figures 1-8 As shown, a furnace temperature tracking recorder temperature parameter calibration device includes a movable base 1 and a constant temperature chamber 6 mounted on the movable base 1. The bottom of the movable base 1 is equipped with a set of casters, preferably omnidirectional casters. A furnace temperature tracking recorder 8 is placed inside the constant temperature chamber 6. A digital thermometer 7 is inserted into the test hole of the constant temperature chamber 6. The movable base 1 can be equipped with a storage drawer to store the digital thermometer 7 and the furnace temperature tracking recorder 8, which can be taken out when needed. An instrument switching mechanism is provided at one end of the movable base 1. In a preferred embodiment, the instrument switching mechanism includes a first support 9 and a second support 13 movably mounted on the top of the movable base 1. Both the first support 9 and the second support 13 are arc-shaped. The first support 9 is located on the side of the second support 13 away from the constant temperature chamber 6 to increase stability. The first bracket 9 and the second bracket 13 are equipped with arc-shaped guide rails corresponding to them. The bottoms of the first bracket 9 and the second bracket 13 are movably connected to the arc-shaped guide rails. Each of the first bracket 9 and the second bracket 13 has a mounting groove 21 at one end. The mounting groove 21 at one end of the first bracket 9 is used to fix the scanning switch 17 and the temperature calibrator 18. At the same time, a groove is set separately on the first bracket 9 to place the external compensation temperature sensor 19 and related wires. The mounting groove 21 at one end of the second bracket 13 is used to fix the high-precision thermometer 15. At the same time, a constant temperature bath 14 is also installed at the end of the second bracket 13, and a groove is also set separately to place and accommodate the standard thermometer 16 and related wires. The mounting groove 21 is used for the detachable installation of the temperature calibrator 18, the scanning switch 17 and the high-precision thermometer 15.

[0021] The movable base 1 is provided with a drive mechanism for driving the first support 9 and the second support 13 to rotate synchronously and in opposite directions around the constant temperature chamber 6. The drive mechanism includes an arc-shaped rack 27 disposed on the opposite side of the lower end of the first support 9 and the second support 13. A gear 11 is rotatably disposed on the upper end of the movable base 1 to mesh with the two racks 27. A drive source 10 for driving the gear 11 to rotate is installed on the movable base 1. The drive source 10 is preferably a geared motor.

[0022] The instrument switching mechanism is equipped with an adaptive heat dissipation mechanism, which includes a cavity 26 located inside the first support 9 and the second support 13. The bottom wall of the mounting slot 21 has an arc-shaped support protrusion 22, which creates a gap between each instrument and the bottom wall of the mounting slot 21, facilitating the extraction of hot air for heat exchange. The side wall of the mounting slot 21 has a recess 23, ensuring a gap between the instrument side wall and the side wall of the mounting slot 21, facilitating heat extraction and airflow. The inner wall of the 3 is provided with a first through hole 24 communicating with the cavity 26. An arc-shaped inner tube 25 is installed on the inner side of the cavity 26 near the first through hole 24. The side wall of the arc-shaped inner tube 25 is evenly provided with second through holes 29. One end of the movable base 1 is provided with an air collecting hood 3. A fan 2 is installed on the air collecting hood 3. An arc-shaped outer tube 12 extending to the inner side of the cavity 26 is movably passed through the first bracket 9 and the second bracket 13. One end of the arc-shaped outer tube 12 is movably sleeved on the outside of the arc-shaped inner tube 25, and the other end is connected to the air collecting hood 3.

[0023] To prevent impurities from entering the interior of the arc-shaped outer tube 12, the arc-shaped inner tube 25, and the fan 2, a dustproof net is installed at the opening of the second through hole 29. When the arc-shaped inner tube 25 moves towards the inside of the arc-shaped outer tube 12, the inner wall of the opening at the end of the arc-shaped outer tube 12 away from the air collecting hood 3 can scrape the impurities on the outer surface of the second through hole 29. A pusher block 28 with a cross-sectional size that matches the cross-sectional size of the cavity 26 is provided at the end of the arc-shaped outer tube 12 away from the air collecting hood 3. The pusher block 28 can ensure that impurities are concentrated and pushed to one end. An opening for impurity discharge is provided at the bottom of one end of the cavity 26, and a collection trough 20 can be detachably installed in this opening.

[0024] To protect the first support 9, the second support 13, and all instruments when not in use, a protective cover 4 is provided on the top of the movable base 1 to cover the first support 9 and the second support 13. The air collecting cover 3 is outside the protective cover 4. One end of the arc-shaped outer tube 12 extends to the outside of the protective cover 4 and connects to the air collecting cover 3. One end of the protective cover 4 is provided with an opening for the first support 9 and the second support 13 to enter and exit. Protective doors 5 are provided at both ends of the inner side of the opening. The two protective doors 5 correspond to the second support 13 and the first support 9, respectively. A rotating shaft 30 is provided on the inner wall of the opening. A rotating hole 31 corresponding to the rotating shaft 30 is installed on the protective door 5. The rotating shaft 30 is rotatably located inside the rotating hole 31. A torsion spring 32 is sleeved on the outer side of the rotating shaft 30. One end of the torsion spring 32 is fixed inside the rotating hole 31, and the other end is fixed to the outer wall of the rotating shaft 30. Under the action of the torsion spring 32, the protective door 5 can be automatically closed.

[0025] The present invention also relates to an embodiment, specifically a method for calibrating the temperature parameters of a furnace temperature tracking recorder, implemented using the aforementioned furnace temperature tracking recorder temperature parameter calibration device, and specifically including the following steps: Step 1: Preparation before calibration: Place the furnace temperature tracking recorder 8 into the constant temperature chamber 6, and at the same time, insert the temperature sensing end of the digital thermometer 7 into the constant temperature chamber 6 through the test hole on the constant temperature chamber 6. Then start the constant temperature chamber 6 and set the specified operating temperature. Step 2: Input signal calibration: The drive mechanism controls the first bracket 9 and the second bracket 13 to move in opposite directions. The scanning switch 17 and the temperature calibrator 18 at one end of the first bracket 9 are moved to the side of the test hole of the constant temperature chamber 6. The scanning switch 17, the temperature calibrator 18 and the furnace temperature tracking recorder 8 are connected by wires. At the same time, the external compensation temperature sensor 19 connected to the temperature calibrator 18 is extended into the inside of the constant temperature chamber 6. Step 3: Calibration of the temperature sensor equipped with furnace temperature tracking recorder 8: After the input signal is calibrated, the wires are removed. Then, the first bracket 9 and the second bracket 13 are moved in opposite directions by the drive mechanism. One end of the constant temperature bath 14 and the high-precision thermometer 15 are moved to the side of the test hole of the constant temperature chamber 6. The scanning switch 17 and the temperature calibrator 18 are removed. The standard thermometer 16 connected to the high-precision thermometer 15 and the temperature sensor on the furnace temperature tracking recorder 8 are bundled together and placed in the constant temperature bath 14 or the calibration furnace. Step 4: After the temperature sensor equipped with the furnace temperature tracking recorder 8 is calibrated, the wires are removed, and the drive mechanism drives the first bracket 9 and the second bracket 13 to move in the opposite direction again, so that the constant temperature bath 14 and the high-precision thermometer 15 are moved away from the test hole of the constant temperature chamber 6, and then data processing is performed.

[0026] It should be noted that since the calibration furnace is only used at temperatures above 300°C, and due to the size and temperature requirements of the calibration furnace itself, it is not concentrated on the mobile base 1. When needed, the mobile base 1 can be moved to its vicinity. Furthermore, the temperature sensors equipped with the calibration furnace, constant temperature chamber 6, digital thermometer 7, furnace temperature tracking recorder 8, scanning switch 17, temperature calibrator 18, external compensated temperature sensor 19, constant temperature bath 14, high-precision thermometer 15, standard thermometer 16, and furnace temperature tracking recorder 8 are all conventional and mature instruments or equipment. Their specific principles and structures will not be elaborated upon in this application.

[0027] The overall working principle is as follows: I. Preparations before calibration Place the furnace temperature tracking recorder 8 on a dedicated tray inside the constant temperature chamber 6 and secure it, ensuring the equipment is stable and secure. For furnace temperature tracking recorders 8 with wireless transmission capabilities, establish a data reading link via host computer software; for those without wireless capabilities, connect via a communication cable. Place the temperature sensing end of the digital thermometer 7 inside the constant temperature chamber 6 through the test hole on the side, keeping it close to the furnace temperature tracking recorder 8 being calibrated. This is used to monitor the operating temperature field inside the constant temperature chamber 6 in real time. Start the constant temperature chamber 6 and set the operating temperature to 40℃, 60℃, or 80℃ according to calibration requirements. Maintain this constant temperature for at least 30 minutes until the actual temperature displayed by the digital thermometer 7 deviates from the set temperature by within ±0.5℃. This step aims to provide a stable and uniform temperature environment for the furnace temperature tracking recorder 8, preventing fluctuations in ambient temperature from causing parameter drift in the internal electronic components of the recorder. This ensures that during subsequent calibration, measurement errors originate solely from the equipment's own performance, rather than from external environmental interference.

[0028] It should be noted that initially, both the first bracket 9 and the second bracket 13 are located inside the protective cover 4 for protection, and the protective door 5 is in the closed state under the action of the torsion spring 32.

[0029] II. First Stage: Input Signal Calibration The first bracket 9 and the second bracket 13 are driven to move in opposite directions by the drive mechanism on the movable base 1. One end of the first bracket 9, which is equipped with a temperature calibrator 18 and an external compensation temperature sensor 19, pushes open the corresponding protective door 5 and moves to the side of the test hole of the constant temperature chamber 6. Meanwhile, the second bracket 13, which is equipped with a constant temperature tank 14 and a high-precision thermometer 15, moves deeper into the protective cover 4. Specifically, the drive source 10 drives the gear 11 to rotate, and the gear 11 drives the first bracket 9 and the second bracket 13 to move in opposite directions through the rack 27. After the scanning switch 17 and the temperature calibrator 18 extend, they are connected to the wiring harness. First, connect the signal output terminal of the temperature calibrator 18 to the input terminal of the scanning switch 17. Then, short-circuit the same polarity of each channel of the scanning switch 17 with a single-core copper wire. Next, connect each output channel of the scanning switch 17 to the interface of each measurement channel of the constant temperature chamber 6 through the test hole sealing plug with a dedicated connecting wire. If the temperature calibrator 18 is equipped with an external compensation temperature sensor 19, the external compensation temperature sensor 19 should be placed into the constant temperature chamber 6 through the test hole. If there is no external compensation temperature sensor 19, the ambient compensation temperature should be manually input based on the temperature data inside the constant temperature chamber 6 monitored by the digital thermometer 7.

[0030] The calibration is carried out point by point in the order of low temperature to high temperature and back to low temperature. By switching the channel of the scanning switch 17, full coverage detection of all measurement channels of the furnace temperature tracking recorder 8 is achieved. After each calibration point is completed, the reading of the corresponding channel of the furnace temperature tracking recorder 8 and the standard value output by the temperature calibrator 18 are recorded simultaneously. The core logic of this stage of calibration is to directly input a standard signal with a known accurate value to the host of the furnace temperature tracking recorder 8, bypass the external temperature sensor of the furnace temperature tracking recorder 8 being calibrated, isolate and calibrate the inherent errors of the host in the signal reception, digital-to-analog conversion and data processing links, ensure that the host's own processing accuracy meets the standard, and eliminate the error interference at the host level for subsequent full-link calibration.

[0031] III. Second Stage: Calibration of the temperature sensor equipped with furnace temperature tracking recorder 8 After the input signal calibration is completed, all kinds of wires and external compensation temperature sensor 19 are retrieved and disassembled. The first bracket 9 is retracted by reversing the drive mechanism. After the first bracket 9 is hidden in the protective cover 4, the corresponding protective door 5 can be automatically closed under the action of torsion spring 32. Meanwhile, one end of the second bracket 13 gradually extends to the outside of the protective cover 4, pushing open the corresponding protective door 5, so that the constant temperature bath 14 and the high-precision thermometer 15 extend to the side of the test hole of the constant temperature chamber 6. Then, the operation is carried out according to the calibration temperature range and the following scenarios: When the calibration temperature is ≤300℃, the external temperature sensor to be calibrated on the furnace temperature tracking recorder 8 is bound and fixed to the measuring end of the standard thermometer 16, ensuring that the measuring ends of the two are in close contact. They are then placed together in the constant temperature bath 14. The standard thermometer 16 is a standard platinum resistance thermometer. If the temperature sensor cannot directly contact the medium of the constant temperature bath 14, it is placed in a glass test tube with a matching inner diameter. The test tube is filled with a heat-conducting medium that is the same as the medium of the constant temperature bath 14. The tube opening is sealed with degreased cotton to eliminate the influence of air convection. The insertion depth of the temperature sensor is not less than 200mm, and it is at the same level as the measuring end of the standard thermometer 16. Before calibration, the standard thermometer 16 needs to be placed in a water triple point bottle to measure its Rtp value, that is, the water triple point resistance value. Then, the standard thermometer 16 is connected to the high-precision thermometer 15 to obtain an accurate standard temperature value.

[0032] When the calibration temperature is >300℃, the temperature sensor to be calibrated and the standard thermometer 16 with a high-alumina protective tube are inserted together into the bottom of the uniform temperature block of the calibration furnace. The furnace opening is sealed with insulating refractory material to ensure the temperature field is stable. At this time, the standard thermometer 16 adopts a standard platinum-rhodium 10-platinum thermocouple. The reference end of the standard platinum-rhodium 10-platinum thermocouple is connected to an ice point thermostat to provide a 0℃ constant temperature field. Then, the standard platinum-rhodium 10-platinum thermocouple is connected to the high-precision temperature measuring instrument 15.

[0033] The calibration is performed point by point in order from low temperature to high temperature: the constant temperature bath 14 needs to be stabilized until the temperature deviates from the calibration point by ±0.2℃ and the fluctuation is ≤0.02℃ / 10min; the calibration furnace needs to be stabilized until the temperature deviates from the calibration point by ±5℃ and the temperature change is ≤0.2℃ / min. Both need to be kept stable for no less than the specified time before readings are taken. The specified time is generally: constant temperature bath ≥5min, calibration furnace ≥10min. Then, the readings of each channel of the furnace temperature tracking recorder 8 and the high-precision thermometer 15 are recorded every 1 minute. Each calibration point is recorded at least four times. The calibration logic of this stage is: on the basis of the host being calibrated, the temperature sensor to be calibrated and the standard thermometer 16 are placed in the same standard temperature field. By comparing the measurement results of the two, the acquisition error of the temperature sensor and the comprehensive error of the entire sensor-host link are calibrated to achieve a comprehensive calibration of the complete measurement link of the furnace temperature tracking recorder 8.

[0034] After the temperature sensor calibration is completed, remove the corresponding wires, temperature sensor and standard thermometer 16, and then use the drive mechanism to retract one end of the second bracket 13 into the protective cover 4, ensuring that both the second bracket 13 and the first bracket 9 are located in the protective cover 4.

[0035] IV. Data Processing and Supplementary Calibration The temperature indication error is calculated by subtracting the average of four readings from the standard instrument from the average of four readings from the same channel of the furnace temperature tracking recorder 8. The standard instrument refers to a combination of a temperature calibrator or a high-precision thermometer 15 and a standard thermometer 16. This calculation method can effectively reduce the random error of a single measurement and ensure the accuracy of error quantification. The inter-channel consistency error is the difference between the maximum and minimum values ​​of the indication errors of each channel, which is used to evaluate the consistency of the multi-channel measurement performance of the furnace temperature tracking recorder 8. The clock error calibration is obtained by synchronously starting the clock of the furnace temperature tracking recorder 8 and the standard timer. After the set 24-hour cycle, the difference between the two timing values ​​is compared, which is used to verify the accuracy of the time recording function of the furnace temperature tracking recorder 8.

[0036] The entire calibration process isolates host errors and recalibrates the entire link error logic step by step to eliminate error sources in different links. Combined with the precise traceability characteristics of standard instruments and stable environmental control, it achieves comprehensive and accurate calibration of temperature indication error, inter-channel consistency error and clock error of furnace temperature tracking recorder 8, ensuring that the metrological performance of furnace temperature tracking recorder 8 meets the usage requirements.

[0037] Furthermore, when the first support 9 or the second support 13 extends, the arc-shaped inner tube 25 will move synchronously with the corresponding first support 9 or second support 13, while the arc-shaped outer tube 12 remains stationary. This results in relative displacement between the arc-shaped inner tube 25 and the arc-shaped outer tube 12. The number of second through holes 29 on the arc-shaped inner tube 25 increases according to the extension of the first support 9 or the second support 13. For example, when the first support 9 extends, the number of exposed second through holes 29 in the first support 9 increases, while the number of exposed second through holes 29 in the second support 13 gradually decreases, or even completely closes, due to the opposite displacement direction to the first support 9. Both arc-shaped outer tubes 12 are connected to a fan 2-equipped air hood 3. Therefore, when the instrument extends for operation, the number of corresponding second through holes 29 increases synchronously, specifically enhancing heat dissipation and quickly removing heat generated by the instruments during operation. When the instrument is idle, the number of second through holes 29 decreases accordingly, and the heat dissipation capacity is adaptively reduced to dissipate residual heat and avoid energy waste. On the basis of achieving forced heat dissipation, it not only solves the problem of local high temperature caused by dense placement of instruments and proximity to heat sources in the existing technology, but also effectively suppresses parameter drift of electronic components caused by high temperature, ensures the stability of the standard instrument reference and the measurement accuracy of the recorder, and provides reliable temperature environment support for high-precision calibration work, while taking into account heat dissipation efficiency and energy saving requirements; and during the process of the first bracket 9 or the second bracket 13 being retracted and hidden inside the protective cover 4, since the arc-shaped inner tube 25 is displaced towards the inside of the arc-shaped outer tube 12, the inner side of one end of the arc-shaped outer tube 12, in conjunction with the debris pusher 28, can push the impurities and foreign objects on the dustproof net at the second through hole 29 to the collection tank 20, and then fall into the collection tank 20 for collection, without the need for separate cleaning.

[0038] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A temperature parameter calibration device for a furnace temperature tracking recorder, characterized in that, The device includes a movable base and a constant temperature chamber mounted on the movable base. A furnace temperature tracking recorder is placed inside the constant temperature chamber, and a digital thermometer is inserted into the test hole of the constant temperature chamber. An instrument switching mechanism is provided at one end of the movable base. The instrument switching mechanism includes a first bracket and a second bracket movably mounted on the top of the movable base. A scanning switch, a temperature calibrator, and an external compensation temperature sensor are provided at one end of the first bracket, and a high-precision thermometer, a constant temperature bath, and a standard thermometer are provided at one end of the second bracket. A drive mechanism is provided on the movable base to drive the first bracket and the second bracket to rotate synchronously and in opposite directions around the constant temperature chamber. The instrument switching mechanism is equipped with an adaptive heat dissipation mechanism, which includes a cavity disposed inside the first support and the second support. The upper end of the first support and the second support is provided with a first through hole communicating with the cavity. An arc-shaped inner tube is installed on the inner side of the cavity near the first through hole. The side wall of the arc-shaped inner tube is uniformly provided with second through holes. A wind collector is installed on one end of the movable base. A fan is installed on the wind collector. An arc-shaped outer tube extending to the inner side of the cavity is movably passed through the first support and the second support. One end of the arc-shaped outer tube is movably sleeved on the outside of the arc-shaped inner tube, and the other end is connected to the wind collector.

2. The furnace temperature tracking recorder temperature parameter calibration device according to claim 1, characterized in that: The drive mechanism includes an arc-shaped rack disposed on the opposite side of the lower end of the first and second supports, a gear rotatably disposed on the upper end of the movable base that meshes with the two racks, and a drive source for driving the gear to rotate is mounted on the movable base.

3. The furnace temperature tracking recorder temperature parameter calibration device according to claim 1, characterized in that: The first and second brackets each have a mounting groove at one end of their top surfaces. The mounting groove is used for the detachable installation of a temperature calibrator, a scanning switch, and a high-precision temperature measuring instrument.

4. The furnace temperature tracking recorder temperature parameter calibration device according to claim 3, characterized in that: The bottom wall of the placement groove is provided with an arc-shaped support protrusion, and the side wall of the placement groove is provided with a notch, with a first through hole opened in the inner wall of the notch.

5. The furnace temperature tracking recorder temperature parameter calibration device according to claim 1, characterized in that: The top of the movable base is provided with a protective cover for covering the first support and the second support, and one end of the protective cover is provided with an opening for the first support and the second support to enter and exit.

6. The furnace temperature tracking recorder temperature parameter calibration device according to claim 5, characterized in that: The protective cover has protective doors at both ends of the opening at one end. The inner wall of the opening is provided with a rotating shaft. The protective door is equipped with a rotating hole corresponding to the rotating shaft. The rotating shaft is rotatably located inside the rotating hole, and a torsion spring is sleeved on the outer side of the rotating shaft. One end of the torsion spring is fixed inside the rotating hole, and the other end is fixed to the outer wall of the rotating shaft.

7. The furnace temperature tracking recorder temperature parameter calibration device according to claim 1, characterized in that: A dustproof mesh is provided at the opening of the second through hole.

8. The furnace temperature tracking recorder temperature parameter calibration device according to claim 7, characterized in that: The end of the arc-shaped outer tube away from the air collecting hood is provided with a debris pushing block whose cross-sectional size is adapted to the cross-sectional size of the inner cavity. The bottom of one end of the cavity is provided with an opening for debris discharge, and a collection trough can be detachably installed in the opening.

9. The furnace temperature tracking recorder temperature parameter calibration device according to claim 1, characterized in that: The top of the movable base is equipped with an arc-shaped guide rail corresponding to the first and second supports, and the bottoms of the first and second supports are movably connected to the arc-shaped guide rail.

10. A method for calibrating temperature parameters of a furnace temperature tracking recorder, implemented using the furnace temperature tracking recorder temperature parameter calibration device according to any one of claims 1-9, characterized in that, Includes the following steps: S1: Preparation before calibration: Place the furnace temperature tracking recorder into the constant temperature chamber, and at the same time, insert the temperature sensing end of the digital thermometer into the constant temperature chamber through the test hole on the constant temperature chamber. Then start the constant temperature chamber and set the specified operating temperature. S2: Input signal calibration: The drive mechanism controls the first and second supports to move in opposite directions. The scanning switch and temperature calibrator at one end of the first support move to the test hole of the constant temperature chamber. The scanning switch, temperature calibrator and furnace temperature tracking recorder are connected by wires. At the same time, the external compensation temperature sensor connected to the temperature calibrator is extended into the inside of the constant temperature chamber. S3: Calibration of the temperature sensor equipped with the furnace temperature tracking recorder: After the input signal is calibrated, the wire is removed. Then, the first and second supports are moved in opposite directions by the drive mechanism. One end of the constant temperature bath and the high-precision thermometer is moved to the side of the test hole of the constant temperature chamber. The scanning switch and the temperature calibrator are moved away. The standard thermometer connected to the high-precision thermometer and the temperature sensor on the furnace temperature tracking recorder are bundled together and placed in the constant temperature bath or calibration furnace. S4: After the temperature sensor equipped with the furnace temperature tracking recorder is calibrated, the wires are removed, and the drive mechanism drives the first and second supports to move in the opposite direction again, so that the constant temperature bath and the high-precision thermometer are moved away from the test hole of the constant temperature chamber, and then data processing is performed.

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