Hot deformation, vicat softening point temperature tester calibration device

Abstract

The utility model provides hot deformation, vicat softening point temperature determination appearance calibration device relates to hot deformation, vicat softening point temperature determination field, including casing, the temperature acquisition module of part setting in the casing and setting on the display of casing, temperature acquisition module includes at least one temperature acquisition assembly, AD converter, treater and memory, and temperature acquisition assembly includes temperature sensor, wheatstone bridge, signal amplification circuit and voltage reference component, temperature sensor is used for the temperature of the medium in medium box, is provided with the interface between temperature sensor and wheatstone bridge, and temperature sensor is inserted on the interface, and voltage reference component is used for providing reference voltage for wheatstone bridge, signal amplification circuit and voltage reference component, the processor is used for converting the digital signal of AD converter output into temperature value, and the display is used for displaying temperature value, has the advantage that improves the accuracy of temperature monitoring in hot deformation, vicat softening point temperature determination appearance calibration.

Description

Technical Field

[0001] This utility model relates to the field of heat deformation and Vicat softening point temperature measurement, and particularly to a calibration device for a heat deformation and Vicat softening point temperature measuring instrument. Background Technology

[0002] A heat distortion temperature and Vicat softening point temperature tester is a specialized device used to measure the heat distortion temperature and Vicat softening temperature of thermoplastics, hard rubbers, and composite materials. Based on the thermo-mechanical coupling effect of the material, it accurately records the temperature at which the material reaches a specific amount of deformation by applying a constant load and controlling the heating rate, thereby evaluating the material's heat resistance. The heat distortion temperature test includes: under a constant load (e.g., 1.82 MPa or 0.45 MPa), heating at a standard rate (typically 120°C / h or 50°C / h), and recording the temperature at which the sample's bending deformation reaches a preset value (e.g., 0.25 mm or 1.0 mm). The Vicat softening point test includes: applying a 1 kg or 5 kg load to the sample surface using a flat-tipped needle, and measuring the temperature when the needle penetrates to a depth of 1 mm.

[0003] Heat distortion and Vicat softening point temperature (WMT) meters are core equipment for evaluating the heat resistance of polymer materials, and their calibration accuracy directly affects the reliability of material research and development and quality control. However, current calibration methods generally rely on manual operation, which has multiple technical defects and restricts the accurate evaluation of equipment performance and standardized application. For example, in existing calibrations, the monitoring and recording of temperature parameters are highly dependent on manual operation. Operators need to manually read and record the thermometer readings, which is not only inefficient but also prone to data distortion due to visual errors, reading time deviations, or recording omissions.

[0004] Therefore, a calibration device for heat distortion and Vicat softening point temperature measuring instruments is needed to improve the accuracy of temperature monitoring during the calibration of these instruments. Utility Model Content

[0005] This utility model provides a calibration device for a heat distortion and Vicat softening point temperature measuring instrument, including a housing, a temperature acquisition module partially disposed within the housing, and a display disposed on the housing. The temperature acquisition module includes at least one temperature acquisition component, an AD converter, a processor, and a memory. The temperature acquisition component includes a temperature sensor, a Wheatstone bridge, a signal amplification circuit, and a voltage reference component. The temperature sensor is used to sense the temperature of the medium in the medium chamber of the heat distortion and Vicat softening point temperature measuring instrument. An interface is provided between the temperature sensor and the Wheatstone bridge, and the temperature sensor is plugged into the interface. The voltage reference component provides a reference voltage for the Wheatstone bridge, the signal amplification circuit, and the voltage reference component. The AD converter converts the analog signal output by the signal amplification circuit into a digital signal. The processor converts the digital signal output by the AD converter into a temperature value. The display shows the temperature value.

[0006] Furthermore, it also includes a cover that covers the medium tank of the heat distortion and Vicat softening point temperature measuring instrument. The cover has an opening for the temperature sensor to pass through. A fixing component is provided between the temperature sensor and the cover, wherein the fixing component is used to fix the position of the temperature sensor.

[0007] Furthermore, the fixing component includes a fixing post disposed on the cover and a snap-fit ​​device disposed on the fixing post, wherein the snap-fit ​​device is used to snap the temperature sensor.

[0008] Furthermore, a height adjusting sleeve is provided between the snap-fit ​​device and the fixed column, with a screw threadedly connected to one side of the height adjusting sleeve, and the snap-fit ​​device is located on the other side of the height adjusting sleeve.

[0009] Furthermore, the temperature acquisition component also includes an anomaly monitoring circuit. The output terminal of the signal amplification circuit is electrically connected to the input terminal of the anomaly monitoring circuit. The anomaly monitoring circuit determines whether an abnormality in temperature acquisition has occurred based on the input signal, and issues an alarm when an abnormality in temperature acquisition occurs.

[0010] Furthermore, the anomaly monitoring circuit includes a voltage comparator, a transistor switch, a push-button switch, and an alarm. The output terminal of the signal amplification circuit is electrically connected to the input terminal of the voltage comparator. The voltage reference component provides a reference voltage for the voltage comparator. When the voltage input to the input terminal of the voltage comparator is less than the reference voltage input to the voltage comparator, the voltage comparator outputs a high level to the driving terminal of the transistor. The push-button switch is connected in series between the transistor and the power supply, and the transistor switch is connected in series between the alarm and the power supply.

[0011] Furthermore, an interface board is also provided inside the housing. The interface board is electrically connected to the processor and includes a human-machine interface, an RS232 communication interface, and a USB interface.

[0012] Furthermore, a clock chip and a battery are also provided inside the housing. The clock chip is electrically connected to the processor, and the battery is electrically connected to the clock chip. The battery is used to save time when power is lost.

[0013] Furthermore, the housing is also equipped with a capacitive multi-touch screen, which is electrically connected to the processor.

[0014] Furthermore, the memory includes a mobile storage device.

[0015] Compared with existing technologies, the calibration device for measuring heat distortion and Vicat softening point temperature provided by this utility model has at least the following beneficial effects: The temperature acquisition module is scientifically designed. The temperature sensor accurately senses the temperature of the medium inside the chamber, converting temperature changes into electrical signals via a Wheatstone bridge. These signals are then amplified by a signal amplifier circuit, and a high-precision AD converter accurately converts the analog signal into a digital signal. Finally, the processor processes the data to produce a temperature value, ensuring accurate and reliable measurement results. This provides precise data for calibrating heat distortion and Vicat softening point temperature measuring instruments. The calibration device is equipped with a display that clearly shows the temperature values ​​in real time. Operators can intuitively obtain measurement results without the need for complex data conversion or reading operations, greatly improving work efficiency and facilitating timely understanding of the instrument's operating status. Attached Figure Description

[0016] This specification will be further described by way of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting; in these embodiments, the same reference numerals denote the same structures, wherein: Figure 1 This is a schematic diagram of the structure of a calibration device for a heat distortion and Vicat softening point temperature measuring instrument, as shown in some embodiments of this specification. Figure 2 This is a schematic diagram of a temperature acquisition module shown in some embodiments of this specification; Figure 3 This is a schematic diagram of an interface board according to some embodiments of this specification.

[0017] In the diagram, 1 is the housing; 2 is the temperature sensor; 3 is the display; 4 is the interface; and 5 is the heat distortion and Vicat softening point temperature measuring instrument. Detailed Implementation

[0018] To more clearly illustrate the technical solutions of the embodiments in this specification, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this specification. For those skilled in the art, these drawings can be applied to other similar scenarios without creative effort. Unless obvious from the context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.

[0019] Figure 1 This is a schematic diagram of the calibration device for the heat distortion and Vicat softening point temperature measuring instrument, as shown in some embodiments of this specification. Figure 1 As shown, the calibration device for the heat distortion and Vicat softening point temperature measuring instrument includes a housing 1, a temperature acquisition module partially disposed within the housing 1, and a display 3 disposed on the housing 1. Figure 2 This is a schematic diagram of a temperature acquisition module shown in some embodiments of this specification, such as... Figure 2 As shown, the temperature acquisition module includes at least one temperature acquisition component, an AD converter, a processor, and a memory. The temperature acquisition component includes a temperature sensor 2, a Wheatstone bridge, a signal amplification circuit, and a voltage reference component. The temperature sensor 2 is used to sense the temperature of the medium in the medium chamber of the thermal deformation and Vicat softening point temperature measuring instrument 5. The medium chamber of the Vicat softening point temperature measuring instrument 5 is a box used to measure the thermal deformation and Vicat softening point temperature of the sample. An interface 4 is provided between the temperature sensor 2 and the Wheatstone bridge, and the temperature sensor 2 is plugged into the interface 4. The voltage reference component is used to provide a reference voltage for the Wheatstone bridge, the signal amplification circuit, and the voltage reference component. The AD converter is used to convert the analog signal output by the signal amplification circuit into a digital signal. The processor is used to convert the digital signal output by the AD converter into a temperature value. The display 3 is used to display the temperature value.

[0020] Specifically, the housing 1 serves as the external protective structure of the entire calibration device. It not only provides physical support and protection for the internal components, ensuring their stable operation, but also effectively shields them from external environmental interference, such as electromagnetic interference and dust, ensuring that the internal components work in a relatively stable environment, thereby improving the overall reliability and stability of the calibration device.

[0021] Temperature sensor 2 (e.g., a PT100 temperature sensor) is a key component in the medium chamber of the Vicat softening point temperature measuring instrument 5, directly sensing the temperature of the medium during thermal deformation. It converts the temperature change of the medium into a corresponding electrical signal (analog signal), providing fundamental data for subsequent temperature measurements. Its performance directly affects the accuracy and sensitivity of temperature acquisition. By comparing the resistance of temperature sensor 2 (e.g., the PT100 temperature sensor) with other known resistances, the resistance change is converted into a voltage change, providing a suitable input signal for subsequent signal processing. Since the signal output from temperature sensor 2 via the Wheatstone bridge is a millivolt-level signal, its strength is relatively weak and easily affected by external interference. The signal amplification circuit amplifies these weak millivolt-level signals to bring them into a voltage range suitable for the AD converter, improving the signal-to-noise ratio and ensuring the accuracy of subsequent conversion. The voltage reference component provides a reference voltage for the Wheatstone bridge, the signal amplification circuit, and itself. The stability of the reference voltage directly affects the measurement accuracy of the entire temperature acquisition module. A stable reference voltage ensures the measurement accuracy of the Wheatstone bridge and the stability of the amplification factor of the signal amplification circuit, thereby ensuring that the final acquired temperature signal is accurate and reliable.

[0022] In the temperature acquisition assembly, an interface 4 is provided between the temperature sensor 2 and the Wheatstone bridge, and the temperature sensor 2 is connected to the interface 4 by plugging it in. This design makes the installation and replacement of the temperature sensor 2 more convenient and quick, while also ensuring the stability of the connection between the temperature sensor 2 and the Wheatstone bridge, reducing measurement errors caused by poor connection.

[0023] An analog-to-digital converter (ADC) is used to convert analog signals output from a signal amplification circuit into digital signals. In this calibration device, the ADC is not limited to 16-bit, 20-bit, or 24-bit ADCs. Its function is to convert continuously changing analog signals into discrete digital signals so that the processor can perform subsequent processing and calculations.

[0024] The processor is the control center of the temperature acquisition module. It receives the digital signals output by the AD converter and converts these digital signals into actual temperature values ​​through a built-in algorithm. This built-in algorithm can be any existing feasible algorithm.

[0025] The memory can be used to store the temperature values ​​output by the processor, providing data support for the temperature calibration of the thermal deformation and Vicat softening point temperature measuring instrument 5.

[0026] Display 3 is mounted on housing 1 to visually display the temperature values ​​calculated by the processor. Operators can view the temperature of the medium in the medium tank of the thermal deformation and Vicat softening point temperature measuring instrument 5 in real time through display 3, facilitating calibration operations and result interpretation.

[0027] The temperature collected by the heat deformation and Vicat softening point temperature measuring instrument 5 can be compared with the temperature collected by the temperature acquisition module to calibrate the heat deformation and Vicat softening point temperature measuring instrument 5.

[0028] Preferably, the calibration device for the heat distortion and Vicat softening point temperature measuring instrument also includes a cover, which covers the medium tank of the heat distortion and Vicat softening point temperature measuring instrument 5. The cover has an opening for the temperature sensor 2 to pass through, and a fixing component is provided between the temperature sensor 2 and the cover, wherein the fixing component is used to fix the position of the temperature sensor 2.

[0029] Specifically, the lid closes onto the media chamber of the heat distortion and Vicat softening point temperature measuring instrument 5, forming a closed protective structure for the media chamber. The lid has an opening for the temperature sensor 2 to pass through. The size and shape of this opening are carefully designed to ensure that the temperature sensor 2 can pass through smoothly while minimizing heat and media leakage, so as to maintain a stable testing environment inside the media chamber.

[0030] Preferably, the fixing component includes a fixing post disposed on the cover and a snap-fit ​​device disposed on the fixing post, wherein the snap-fit ​​device is used to snap-fit ​​the temperature sensor 2.

[0031] Specifically, the snap-fit ​​device is mounted on a fixed post and is made of a material with a certain degree of elasticity, such as plastic or metal spring sheets.

[0032] Preferably, a height adjustment sleeve is provided between the clamping device and the fixed column, with a screw threaded onto one side of the height adjustment sleeve and the clamping device located on the other side of the height adjustment sleeve.

[0033] Specifically, the core principle behind height adjustment using a height adjusting sleeve is based on the adjustability of a threaded connection. A fixed post is inserted into the hollow part of the height adjusting sleeve, typically with a clearance fit, allowing the sleeve to slide up and down on the fixed post. When adjusting the height of the clamping device, the screw is first loosened. This releases the constraint between the height adjusting sleeve and the fixed post, allowing the sleeve to move freely along the post. The operator then moves the sleeve to the desired position and tightens the screw. The end of the screw presses firmly against the fixed post, generating sufficient friction to secure the sleeve and lock the height of the clamping device.

[0034] Preferably, the temperature acquisition component also includes an anomaly monitoring circuit. The output terminal of the signal amplification circuit is electrically connected to the input terminal of the anomaly monitoring circuit. The anomaly monitoring circuit determines whether an abnormality in temperature acquisition has occurred based on the input signal and issues an alarm when an abnormality in temperature acquisition occurs.

[0035] Preferably, the anomaly monitoring circuit includes a voltage comparator, a transistor switch, a push-button switch, and an alarm. The output of the signal amplification circuit is electrically connected to the input of the voltage comparator. The voltage reference component provides a reference voltage to the voltage comparator. When the voltage input to the input of the voltage comparator is less than the reference voltage input to the voltage comparator, the voltage comparator outputs a high level to the driving terminal of the transistor. A push-button switch is connected in series between the transistor and the power supply, and a transistor switch is connected in series between the alarm and the power supply.

[0036] Specifically, when using a temperature acquisition component, the operator manually presses the button switch. The voltage comparator compares the input voltage with the reference voltage provided by the voltage reference component. If the input voltage is greater than or equal to the reference voltage, it indicates that the temperature acquisition is normal, the voltage comparator outputs a low level, the transistor remains in the off state, and the alarm does not activate. When the input voltage is less than the reference voltage, the voltage comparator outputs a high level to the transistor's drive terminal, turning the transistor on. Since the button switch is in the closed state, a path is formed between the alarm and the power supply, energizing the alarm and alerting the operator that there is an anomaly in the temperature acquisition.

[0037] Figure 3 This is a schematic diagram of the interface board according to some embodiments of this specification, such as... Figure 3 As shown, preferably, an interface board is also provided inside the housing 1. The interface board is electrically connected to the processor. The interface board includes a human-machine interface, an RS232 communication interface, and a USB interface. The USB interface can be used for system upgrades of the processor.

[0038] Preferably, the housing 1 also contains a clock chip and a battery. The clock chip is electrically connected to the processor, and the battery is electrically connected to the clock chip. The battery is used to save time when power is off.

[0039] Specifically, the clock chip, as the core component for time measurement, establishes a close electrical connection with the processor. The processor can precisely control and interact with the clock chip, synchronizing its timing rhythm to ensure accuracy and consistency. Furthermore, it can collect the timing results recorded by the clock chip in real time, providing accurate time data for various time-related operations of the device. The battery is specifically designed for preserving the clock chip's time even when it is powered off. In the event of a power outage or other abnormal situation, the battery continuously supplies power to the clock chip, ensuring that the timing data within the chip is not lost. This allows the device to quickly restore its accurate time state before the power outage upon power restoration, avoiding timing interruptions and data corruption caused by power failures. This provides a reliable time reference for subsequent time-based operations, such as triggering the temperature measurement module to perform multi-channel temperature acquisition and storage when a specified time arrives, and achieving multi-channel synchronous acquisition.

[0040] Preferably, the housing 1 is also provided with a capacitive multi-touch screen, which is electrically connected to the processor.

[0041] Preferably, the storage device includes a portable storage device, such as a USB flash drive.

[0042] Finally, it should be understood that the embodiments described in this specification are merely illustrative of the principles of the embodiments described herein. Other variations may also fall within the scope of this specification. Therefore, alternative configurations of the embodiments described herein are intended to be illustrative rather than limiting, and should be considered consistent with the teachings of this specification. Accordingly, the embodiments described herein are not limited to those explicitly introduced and described herein.

Claims

1. A calibration device for a heat distortion and Vicat softening point temperature measuring instrument, characterized in that, The device includes a housing, a temperature acquisition module partially disposed within the housing, and a display mounted on the housing. The temperature acquisition module includes at least one temperature acquisition component, an AD converter, a processor, and a memory. The temperature acquisition component includes a temperature sensor, a Wheatstone bridge, a signal amplification circuit, and a voltage reference component. The temperature sensor is used to sense the temperature of the medium within the media chamber of the thermal deformation and Vicat softening point temperature measuring instrument. An interface is provided between the temperature sensor and the Wheatstone bridge, and the temperature sensor is plugged into the interface. The voltage reference component provides a reference voltage for the Wheatstone bridge, the signal amplification circuit, and the voltage reference component. The AD converter converts the analog signal output by the signal amplification circuit into a digital signal. The processor converts the digital signal output by the AD converter into a temperature value. The display shows the temperature value.

2. The calibration device for the heat distortion and Vicat softening point temperature measuring instrument according to claim 1, characterized in that, It also includes a cover that covers the medium tank of the heat distortion and Vicat softening point temperature measuring instrument. The cover has an opening for the temperature sensor to pass through. A fixing component is provided between the temperature sensor and the cover, wherein the fixing component is used to fix the position of the temperature sensor.

3. The calibration device for the heat distortion and Vicat softening point temperature measuring instrument according to claim 2, characterized in that, The fixing assembly includes a fixing post disposed on the cover and a snap-fit ​​device disposed on the fixing post, wherein the snap-fit ​​device is used to snap the temperature sensor.

4. The hot creep, Vicat softening point apparatus calibration device of claim 3, wherein, A height-adjusting sleeve is provided between the clamping device and the fixed column. A screw is threaded onto one side of the height-adjusting sleeve, and the clamping device is located on the other side of the height-adjusting sleeve.

5. The hot creep, Vicat softening point apparatus calibration device according to any one of claims 1-4, wherein, The temperature acquisition component also includes an anomaly monitoring circuit. The output terminal of the signal amplification circuit is electrically connected to the input terminal of the anomaly monitoring circuit. The anomaly monitoring circuit determines whether an abnormality in temperature acquisition has occurred based on the input signal and issues an alarm when an abnormality in temperature acquisition occurs.

6. The calibration device for the heat distortion and Vicat softening point temperature measuring instrument according to claim 5, characterized in that, The anomaly monitoring circuit includes a voltage comparator, a transistor switch, a push-button switch, and an alarm. The output of the signal amplification circuit is electrically connected to the input of the voltage comparator. The voltage reference component provides a reference voltage for the voltage comparator. When the voltage input to the voltage comparator is less than the reference voltage, the voltage comparator outputs a high level to the driving terminal of the transistor. The push-button switch is connected in series between the transistor and the power supply, and the transistor switch is connected in series between the alarm and the power supply.

7. The calibration device for the heat distortion and Vicat softening point temperature measuring instrument according to any one of claims 1-4, characterized in that, An interface board is also provided inside the housing. The interface board is electrically connected to the processor and includes a human-machine interface, an RS232 communication interface, and a USB interface.

8. The calibration device for the heat distortion and Vicat softening point temperature measuring instrument according to any one of claims 1-4, characterized in that, The housing also contains a clock chip and a battery. The clock chip is electrically connected to the processor, and the battery is electrically connected to the clock chip. The battery is used to save time when power is lost.

9. The calibration device for the heat distortion and Vicat softening point temperature measuring instrument according to any one of claims 1-4, characterized in that, The housing is also equipped with a capacitive multi-touch screen, which is electrically connected to the processor.

10. The calibration device for the heat distortion and Vicat softening point temperature measuring instrument according to any one of claims 1-4, characterized in that, The memory includes a mobile storage device.

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