Automatic detection calibrator

Abstract

The utility model discloses an automatic detection calibrator, and relates to the technical field of data processing, and the automatic detection calibrator comprises a data verification module which is connected with a digital display module and a circuit protection module and is used for verifying data to be verified; the digital display module is connected with the data verification module and used for displaying the verification process of the data verification module; and the circuit protection module is connected with the data verification module and is used for protecting the whole automatic detection calibrator. According to the automatic detection calibrator, the efficiency and the accuracy of data calibration are improved.

Description

Technical Field

[0001] This utility model relates to the field of data processing technology, and more specifically to an automatic detection and calibration instrument. Background Technology

[0002] Analog data acquisition is easily affected by various factors, leading to inaccurate data. Calibration can eliminate or reduce errors caused by factors such as temperature changes, inconsistent device characteristics, and time drift, thereby improving the accuracy of data acquisition, ensuring stability, and adapting to environmental changes. In the production process, manual calibration is usually used to ensure product stability.

[0003] However, manual calibration has the following two drawbacks:

[0004] Subjectivity and misjudgment: Manual calibration is easily affected by subjective factors. Different people may have different understandings of the same standard, leading to inconsistencies in calibration results. In addition, certain defects in the manual calibration process may cause visual fatigue, leading to misjudgments.

[0005] Efficiency and accuracy issues: Manual calibration is relatively inefficient and its accuracy is difficult to guarantee. Manual calibration is easily affected by external interference, such as improper use of signal sources, which may affect the efficiency and accuracy of calibration.

[0006] Therefore, there is an urgent need for an automatic detection and calibration instrument that can solve the above problems. Utility Model Content

[0007] The purpose of this invention is to provide an automatic detection and verification instrument, thereby increasing the accuracy and efficiency of data verification.

[0008] To achieve the above objectives, this utility model provides an automatic detection and calibration instrument, which includes:

[0009] The data verification module is connected to the digital display module and the circuit protection module respectively, and is used to verify the data to be verified.

[0010] The digital display module is connected to the data verification module and is used to display the verification process of the data verification module.

[0011] The circuit protection module, connected to the data verification module, is used to protect the entire automatic testing and verification instrument.

[0012] In another embodiment, the data verification module includes:

[0013] The M0516 microcontroller is used to verify the data to be verified.

[0014] In another embodiment, the data verification module further includes:

[0015] The resistance temperature detector (RTD) calibration unit is used to calibrate the data of the RTD.

[0016] In another embodiment, the data verification module further includes:

[0017] Thermocouple hot junction calibration unit is used to calibrate the data of the thermocouple hot junction.

[0018] In another embodiment, the data verification module further includes:

[0019] Thermocouple cold junction calibration unit is used to calibrate the data of thermocouple cold junctions.

[0020] In another embodiment, the data verification module further includes:

[0021] The current calibration unit is used to calibrate the current data.

[0022] In another embodiment, the automatic detection calibrator further includes:

[0023] The communication module is connected to the data verification module and is used to send verification information to the client.

[0024] In another embodiment, the communication module is established based on the TTL protocol and the RS-485 standard.

[0025] In another embodiment, the automatic detection calibrator further includes:

[0026] The switch signal detection module is used to detect the status of switch signals.

[0027] In another embodiment, the automatic detection calibrator further includes:

[0028] Switching power supply is used to control the start-up and shutdown of the automatic testing and calibration instrument.

[0029] The beneficial effects of this utility model are as follows:

[0030] The data verification module in this invention is connected to both the digital display module and the circuit protection module. It is used to verify the data to be verified. The digital display module, also connected to the data verification module, displays the verification process. The circuit protection module, connected to the data verification module, protects the entire automatic testing and verification instrument. The data verification module can automatically verify various types of data. Compared to manual verification, it avoids subjectivity and misjudgment, greatly increasing the accuracy and efficiency of verification. The digital display module allows maintenance personnel to monitor the data verification status in real time, while the circuit protection module provides real-time protection for the entire automatic testing and verification instrument, preventing damage caused by overvoltage or overcurrent in the instrument's circuitry.

[0031] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of an automatic detection and calibration instrument according to an embodiment of this application. Detailed Implementation

[0033] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. It should be noted that references to "an embodiment," "embodiment," "example embodiment," etc., in this specification refer to the described embodiment including specific features, structures, or characteristics; however, not every embodiment must include these specific features, structures, or characteristics. Furthermore, such expressions do not refer to the same embodiment. Moreover, when describing specific features, structures, or characteristics in conjunction with embodiments, whether or not explicitly described, it is indicated that incorporating such features, structures, or characteristics into other embodiments is within the knowledge scope of those skilled in the art.

[0034] Furthermore, certain terms are used in the specification and subsequent claims to refer to specific components or parts. Those skilled in the art will understand that manufacturers may use different names or terms to refer to the same component or part. This specification and subsequent claims do not distinguish components or parts by differences in name, but rather by differences in function. The terms "comprising" and "including" used throughout the specification and subsequent claims are open-ended and should be interpreted as "including but not limited to." Additionally, the term "connection" here includes any direct and indirect electrical connection means. Indirect electrical connection means include connections made through other means.

[0035] Please see Figure 1 The data verification module is connected to both the digital display module and the circuit protection module, and is used to verify the data to be verified. The digital display module is connected to the data verification module and is used to display the verification process of the data verification module. The circuit protection module is connected to the data verification module and is used to protect the entire automatic detection and verification instrument.

[0036] The data verification module includes an M0516 microcontroller, a resistance temperature detector (RTD) calibration unit, a thermocouple hot junction calibration unit, a thermocouple cold junction calibration unit, and a current calibration unit.

[0037] Specifically, the M0516 microcontroller serves as the core control unit of the automatic testing and calibration instrument system, responsible for managing the operation and functions of the entire instrument. It possesses certain processing capabilities and multiple interface functions, making it suitable for embedded system development. The role of the M0516 microcontroller in the automatic testing and calibration instrument can include the following aspects: 1. Data Acquisition and Processing: Automatic testing and calibration instruments typically need to acquire data from various sensors or testing equipment, such as voltage, current, temperature, and frequency signals. The M0516 microcontroller can collect data from external sensors through its ADC (analog-to-digital converter) or digital input / output ports, and then process and store the data. 2. Control and Scheduling: Based on the acquired data signals, the microcontroller can control peripherals such as relays, switches, and displays to achieve automated operation. For example, the instrument may need to automatically switch measurement ranges, adjust parameters, or trigger alarms based on test results. 3. User Interaction: Users typically operate the automatic testing and calibrating instrument via buttons, touchscreens, or other input devices. The M0516 microcontroller processes user input and controls the display (such as LCD or LED) to output test results, status information, or prompts, facilitating real-time monitoring and adjustment by operators. 4. Communication and Interface Management: The automatic testing and calibrating instrument may need to exchange data with other devices or computers. The microcontroller uses supported communication protocols such as UART, I2C, and SPI to communicate with other devices, such as uploading test data to a host computer or remotely controlling the instrument via a network. 5. Storage and Recording: The M0516 microcontroller typically has a certain amount of memory to store test results, parameter configurations, and historical data. In some applications, the microcontroller can also write this data to external storage devices, such as EEPROM or SD cards, for later viewing or analysis. 6. Real-time control and timing functions: The built-in timer and interrupt mechanism of the M0516 microcontroller enables the device to achieve high-precision time control functions. For example, it can trigger certain test steps at timed intervals or automatically perform periodic detection and verification within a specific time interval.

[0038] The RTD calibration unit is responsible for the precise calibration and verification of the temperature measurement system. A resistance temperature detector (RTD) is a commonly used temperature sensor that measures temperature by detecting changes in resistance caused by temperature variations. The specific functions of the RTD calibration unit include: 1. RTD sensor calibration: Temperature-resistance relationship calibration: The working principle of an RTD is based on the known relationship between temperature and resistance (such as the standard curve of a platinum resistance thermometer). The calibration unit uses known temperatures (provided by a standard source or reference temperature control device) to calibrate the RTD sensor, ensuring that its output signal accurately reflects the temperature. Zero point and slope adjustment: By measuring different temperature points (such as freezing point, room temperature, boiling point, etc.) and comparing them with standard values, the calibration unit can adjust the zero point and slope of the RTD sensor to make its response more accurate. 2. Temperature simulation and output: Temperature simulation: The RTD calibration unit typically has a built-in high-precision temperature control system capable of simulating various standard temperature points. It simulates various operating temperatures and checks the accuracy of the RTD's output by providing a stable standard temperature or RTD reference point (e.g., using precision heating elements and temperature sensors to simulate different temperature conditions). Precise temperature control: The calibration unit may use a high-precision temperature control system to generate an accurate test environment, such as using a thermostat (temperature controller) to provide a stable temperature environment to ensure the accurate response of the RTD under different temperature conditions. 3. Temperature to resistance conversion: Resistance measurement and calculation: The RTD works based on the change in resistance caused by temperature changes. The calibration unit is responsible for measuring the resistance value of the RTD using a high-precision ohmmeter (or a precision analog-to-digital converter, ADC) and converting the resistance to temperature according to a known temperature-resistance relationship (e.g., using a standard curve common to platinum resistance thermometers). Error detection and correction: The calibration unit can detect deviations between the sensor output and the expected standard temperature and correct temperature display errors through software adjustments and compensation algorithms. 4. Sensitivity and stability verification of the RTD sensor: The calibration unit can also verify the sensitivity (rate of resistance change with temperature) and stability (performance retention after long-term use) of the RTD. 5. Accuracy Verification and Certificate Generation: After calibration, the RTD calibration unit records and verifies the calibration results, typically generating a calibration report or certificate indicating the sensor's accuracy and error range. This is crucial for applications requiring high-precision temperature measurement (such as laboratories and industrial production). 6. Automated Calibration and Testing: Automated calibration: Modern automated testing and calibration instruments are often equipped with automated calibration functions. The calibration unit can automatically perform multi-point calibration of the RTD without human intervention, improving work efficiency and accuracy.Real-time monitoring: This unit can also monitor parameter changes during the calibration process in real time, issuing timely warnings or prompts to ensure the calibration process meets requirements. 7. Multi-channel support: In some high-end automated testing and calibrating instruments, the RTD calibration unit supports parallel calibration of multiple RTD sensors. This function can calibrate multiple temperature sensors simultaneously, improving testing efficiency on production lines or in laboratories.

[0039] The specific functions of the thermocouple hot junction calibration unit include: 1. Temperature simulation of the thermocouple junction: Precise temperature control: The thermocouple hot junction calibration unit can simulate different temperature conditions to test the hot junction response of the thermocouple. Through a thermostatic bath or heating element, the unit can provide a precise temperature environment for the thermocouple hot junction. These temperatures typically cover the entire application range, such as low temperatures (e.g., -40°C), normal temperatures (e.g., 25°C), and high temperatures (e.g., 800°C, 1000°C, etc.). Precise hot junction temperature generation: This unit can provide a stable and accurate measurement temperature through heating elements or liquid thermostatic baths, simulating the temperature conditions of the thermocouple hot junction in actual operation. 2. Temperature potential calibration of the thermocouple hot junction: Potential-temperature relationship calibration: There is a known relationship between the output potential of the thermocouple and temperature change (e.g., international standard thermocouple reference tables). This unit calibrates the response of the thermocouple hot junction by accurately measuring the output potential (voltage) of the thermocouple at different temperatures and comparing it with standard values. Multi-point calibration: By calibrating the thermocouple at different temperature points, the thermocouple hot junction calibration unit ensures the accuracy of the thermocouple output throughout its operating range, paying particular attention to the thermocouple's nonlinear characteristics to ensure accurate potential changes across all temperature ranges. 3. Calibration based on thermocouple type and material: Adapting to different thermocouple types: Different types of thermocouples (such as K-type, J-type, T-type, S-type, etc.) have different materials and thermoelectric potential-temperature curves. The calibration unit can automatically identify the thermocouple type and apply the corresponding standard curve for calibration. Material compensation: Thermocouple calibration not only needs to consider different types but also the stability and characteristics of the thermocouple material. The calibration unit can perform specific compensation for the hot junction based on the different thermocouple materials, ensuring its accuracy at high and low temperatures. 4. Contact compensation and reference contact management: Cold junction compensation: The output voltage of a thermocouple is not only related to the hot junction temperature but also affected by the cold junction (reference junction) temperature. Thermocouple hot junction calibration units are typically equipped with cold junction compensation, automatically adjusting the thermocouple signal using a reference junction with a known temperature (such as a standard cold junction reference temperature, usually 0°C or 25°C). Dynamic compensation: For some high-precision applications, the calibration unit can also monitor the cold junction temperature in real time and perform dynamic compensation, thereby eliminating the influence of cold junction temperature changes on the thermocouple output and ensuring the accuracy of the thermocouple under different operating conditions. 5. Thermocouple response time and stability verification: Response time measurement: The response speed of a thermocouple has a significant impact on temperature measurement in practical applications, especially in rapidly changing temperature environments. Thermocouple hot junction calibration units can test the response time of a thermocouple, that is, the time it takes for it to reach a stable output when the temperature changes, ensuring that it meets application requirements. Long-term stability verification: The stability of the thermocouple (especially at high temperatures) is also an important part of the calibration process. Through long-term heating and cyclic heating and cooling, the calibration unit can verify the long-term stability and consistency of the thermocouple.6. Thermocouple Hot Junction Accuracy Verification and Certificate Generation: The calibration unit can compare the response output voltage of a standard thermocouple with the measurement results of the equipment to confirm whether the thermocouple meets the standard. After calibration, the calibration unit usually generates a calibration report or certificate, recording the calibrated temperature points, potential values, measurement errors, and the calibration accuracy of the equipment. Accuracy and Error Analysis: By calibrating multiple temperature points, the calibration unit can provide a detailed analysis of the thermocouple hot junction calibration error and generate corresponding error curves to help users evaluate the error range of the thermocouple in actual use. 7. Automated Operation and Multi-Channel Support: Automated Calibration: Modern automated testing and calibration instruments often have automated calibration functions. The calibration unit can automatically detect, adjust, and calibrate thermocouples without manual intervention, greatly improving work efficiency. Multi-Channel Support: Some high-end calibration units support simultaneous calibration of multiple thermocouple channels, allowing for the simultaneous calibration of multiple thermocouples, suitable for multi-sensor equipment used in production lines or large laboratories.

[0040] The specific functions of a thermocouple cold junction calibration unit include: 1. Cold junction temperature monitoring and control: Cold junction temperature detection: One of the core functions of a cold junction calibration unit is to accurately monitor the temperature of the cold junction. The temperature of the cold junction may affect the output voltage of the thermocouple; therefore, the calibration unit needs to monitor the temperature of the cold junction in real time for compensation. A common practice is to use a high-precision temperature sensor (such as a PT100, the thermocouple itself, or other high-precision sensors) to measure the actual temperature of the cold junction. Temperature stability control: For effective cold junction compensation, the temperature of the cold junction usually needs to be kept stable. The calibration unit can control the temperature of the cold junction using a temperature-controlled device (such as an ice bath, temperature control console, etc.) to keep it at a known, standard reference temperature value (e.g., 0°C or 25°C). 2. Cold junction compensation function: Compensation potential calculation: The output voltage (thermoelectric potential) of a thermocouple is caused by the temperature difference between the hot and cold junctions; therefore, cold junction compensation is needed to eliminate the influence of cold junction temperature changes. The cold junction calibration unit accurately calculates the cold junction temperature and compensates for its effects, ensuring that the thermocouple output potential reflects only the hot junction temperature and is unaffected by changes in the cold junction temperature. Compensation based on standard references: Cold junction compensation typically relies on standard reference tables, such as international thermocouple standards (e.g., ITS-90 temperature scale), and cold junction compensation curves for each thermocouple type (K-type, J-type, T-type, etc.). The calibration unit performs real-time compensation based on these standards and the characteristics of the thermocouple materials. 3. Calibration of the relationship between cold junction temperature and thermocouple output: Cold junction-potential relationship: The cold junction calibration unit can calibrate the relationship between cold junction temperature and thermocouple output potential. By testing multiple cold junction temperatures (e.g., cold junction temperatures at different ambient temperatures), the calibration unit verifies the accuracy of cold junction compensation and ensures that cold junction temperature changes under different operating environments are correctly compensated for. Application of standard thermocouple compensation curves: Based on the cold junction compensation requirements of different types of thermocouples, the calibration unit incorporates relevant standard compensation curves or algorithms to automatically perform temperature compensation. For example, the cold junction compensation curves for type K thermocouples and type T thermocouples differ, and the calibration unit automatically selects the appropriate curve based on the thermocouple type. 4. Precise Calibration of Cold Junction Compensation Accuracy: Calibration Accuracy Verification: The calibration unit can precisely verify the accuracy of the cold junction compensation function, ensuring that excessive errors are not generated during the compensation process. By repeatedly verifying the matching between the thermocouple's output potential and the standard temperature, the calibration unit can ensure that its cold junction compensation function has high accuracy across different temperature ranges. Error Analysis and Compensation Adjustment: If errors occur in cold junction compensation, the calibration unit can automatically identify and adjust them to ensure the accuracy of the compensation results. During the calibration process, a detailed analysis report on cold junction compensation errors can also be provided to help users understand the thermocouple's compensation performance under specific environments.5. Compensation for Unstable Cold Junction Temperature: Dynamic Compensation Mechanism: In certain working environments, the cold junction temperature may fluctuate over time or due to other external factors (such as changes in ambient temperature or equipment operating status). The cold junction calibration unit can monitor changes in the cold junction temperature in real time and perform dynamic compensation based on real-time data, thereby eliminating the impact of cold junction temperature fluctuations on the thermocouple output potential. Multi-point Temperature Compensation: To cope with changes in cold junction temperature under different environmental conditions, the calibration unit can perform multi-point dynamic compensation. By testing at multiple reference temperature points, it ensures that the thermocouple can still output correct temperature data under different cold junction temperature conditions. 6. Automated Operation and Multi-channel Support: Automated Cold Junction Calibration: Modern automatic testing and calibrating instruments typically have automated cold junction calibration functions, which can complete cold junction temperature detection and compensation without manual intervention. This improves work efficiency and reduces human error. Multi-channel Calibration Support: For equipment that requires calibration of multiple thermocouples, the cold junction calibration unit can support calibration operations for multiple channels simultaneously, independently compensating the cold junction of each channel, suitable for use in industrial production lines and large laboratories. 7. Compliance and Standardization of Cold Junction Compensation: Standard Compliance Check: The thermocouple cold junction calibration unit ensures that the cold junction compensation process complies with international standards and industry specifications (such as IEC, ASTM, etc.) and provides compliance reports and certificates to ensure the reliability of calibration results. Quality Control of Cold Junction Compensation: Through cold junction compensation, the calibration unit not only improves the measurement accuracy of thermocouples but also verifies the quality of the entire temperature measurement system, ensuring compliance with required accuracy standards.

[0041] The core function of the current calibration unit in an automatic testing and calibration instrument is to provide a high-precision current signal source and calibrate the measuring equipment. Its functions encompass a wide range, from precise current source generation, measurement equipment calibration and error compensation, multi-point calibration, noise suppression, and temperature stability control, to automated operation and standard compliance checks. Through these functions, the current calibration unit ensures the accuracy and reliability of the current measurement system.

[0042] The digital display module plays a crucial role in automatic calibration instruments. It not only displays calibration results, equipment status, and operational information, but also provides error messages, warnings, and historical data viewing. Through these functions, the digital display module enables operators to intuitively and clearly understand various information during the calibration process, thereby improving work efficiency, ensuring measurement accuracy, and helping to promptly identify and resolve problems.

[0043] The core function of the circuit protection module is to prevent damage to equipment from electrical faults during operation, ensuring the safety of the equipment and the instrument under test. It monitors and manages various abnormal conditions such as overcurrent, overvoltage, short circuit, overheating, and electrostatic discharge, automatically taking protective measures such as power cut-off, current limiting, alarm activation, and isolation to ensure the normal operation of the equipment. By integrating current, voltage, temperature, and short-circuit protection mechanisms, the circuit protection module effectively improves the reliability and safety of the calibrator, preventing equipment damage or personal injury caused by external or internal faults.

[0044] In another embodiment, such as Figure 1 As shown, the automatic detection and calibration instrument also includes: a communication module, which is connected to the data verification module and is used to send verification information to the client; a switch quantity detection module, which is used to detect the status of the switch signal; and a switching power supply, which is used to control the start and stop of the automatic detection and calibration instrument.

[0045] The communication module is based on the TTL protocol and the RS-485 standard.

[0046] Specifically, the core role of the communication module in the automatic testing and calibration instrument is to enable real-time data exchange, remote control, and monitoring between the device and external systems. It supports multiple communication protocols (such as TTL) and interfaces (RS-485), and can process real-time measurement data, alarm information, and device status, storing and sharing data via network or cloud platform. Through the communication module, users can achieve remote control, automated testing, device integration, and cloud platform data analysis, greatly improving the automation level, remote management capabilities, and data management capabilities of the equipment.

[0047] Switch signal detection modules are an important component of automation systems. They ensure normal operation, fault detection, and safety by acquiring and monitoring the status of switch signals in equipment or systems in real time.

[0048] The main functions of switching power supplies in automatic testing and calibrating instruments include providing stable and efficient power output, implementing power protection, reducing noise interference, and providing multiple power outputs. Their high efficiency, compact design, and multiple protection functions make them an indispensable component of modern automatic testing and calibrating instruments. Switching power supplies not only ensure the stable operation of various modules within the calibrator but also effectively extend the equipment's lifespan, reduce the risk of failure, and improve overall performance.

[0049] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An automatic detection checker characterized by, The automatic detection checker comprises: A data checking module connected with the digital display module and the circuit protection module, used for checking the data to be checked; A digital display module connected with the data checking module, used for displaying the checking process of the data checking module; A circuit protection module connected with the data checking module, used for protecting the automatic detection checker.

2. The automatic test checker of claim 1, wherein The data checking module comprises: An M0516 single-chip microcomputer used for checking the data to be checked.

3. The automatic test checker of claim 2, wherein, The data checking module further comprises: A hot resistance calibration unit used for calibrating the hot resistance.

4. The automatic test checker of claim 2, wherein, The data checking module further comprises: A hot end of thermocouple calibration unit used for calibrating the hot end of thermocouple.

5. The automatic test checker of claim 1, wherein The data checking module further comprises: A cold end of thermocouple calibration unit used for calibrating the cold end of thermocouple.

6. The automatic test checker of claim 2, wherein The data checking module further comprises: A current calibration unit used for calibrating the current.

7. The automatic test checker of claim 1, wherein The automatic detection checker further comprises: A communication module connected with the data checking module, used for sending the checking information to the client.

8. The automatic test checker of claim 7, wherein, The communication module is established based on the TTL protocol and the RS-485 standard.

9. The automatic test checker of claim 1, wherein The automatic detection checker further comprises: A switch quantity detection module used for detecting the state of the switch signal.

10. The automatic test checker of claim 1, wherein The automatic detection checker further comprises: A switching power supply used for controlling the start and stop of the automatic detection checker.

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