An embedded automatic calibration device

Abstract

This invention relates to the field of automatic calibration technology, specifically to an embedded automatic calibration device, comprising: a processing module connected to a liquid level sensor and a motor drive module; the motor drive module drives a stepper motor to rotate, thereby changing the height of a calibration plate and affecting the reading of the liquid level sensor; the liquid level sensor outputs a liquid level analog signal for the processing module to read and calibrate. Addressing the problem of low accuracy and efficiency in existing liquid level sensor calibration schemes, this invention introduces a stepper motor controlled by a processing module. The processing module sequentially generates drive signals to move the stepper motor a corresponding distance, and then automatically calibrates by detecting the liquid level sensor's reading, thereby improving the accuracy and efficiency of calibration.

Description

Technical Field

[0001] This invention relates to the field of automatic calibration technology, and more specifically to an embedded automatic calibration device. Background Technology

[0002] Steel level measurement is a crucial quality control step in the continuous casting process of steel plants. It uses level sensors to measure the height of the molten steel to control the feeding and discharging processes on the production line. The accuracy of the level measurement directly affects the accuracy of each feeding and discharging step and the final product quality; therefore, the level sensors need frequent recalibration. Level calibration establishes an accurate starting point for steel level measurement during continuous casting, and the accuracy of the calibration determines the accuracy of the level measurement.

[0003] For example, patent application CN202311778378.X discloses a continuous casting machine crystallizer simulation molten steel level detection and calibration device, including a support and a crystallizer. The support is installed at the top of the crystallizer, and an adjustment mechanism is fixedly connected to the top of the support. A protective shell is detachably installed on one side of the adjustment mechanism. A size display is provided on the outer wall of the protective shell, and a motion mechanism is provided inside the protective shell. A steel billet cross-section is detachably connected to the bottom of the motion mechanism, and a calibration probe is installed at the bottom of the support. By using a drive unit to replace manual control of the steel billet cross-section for raising and lowering, the traditional three-person operation is reduced to one person, reducing pre-production preparation time and greatly improving work efficiency. At the same time as the steel billet cross-section is raised and lowered, a synchronous vibration unit strikes and vibrates the support, fully simulating the working scene of the continuous casting machine, reducing the error of the calibration probe, improving the accuracy of the detection and calibration data, and meeting the needs of users during production and packaging.

[0004] For example, patent application CN202120553358.2 discloses a crystallizer molten steel level raising and lowering calibration device, which has a base support. The base support is equipped with a raising screw and a rotating support. The raising screw extends from top to bottom to the bottom of the base support. The rotating support rotates in conjunction with the raising screw to drive the raising screw to move up and down. A chain is connected to the bottom end of the raising screw, and a calibration block for calibrating the molten steel level is connected to the bottom end of the chain. The base support is equipped with a stop bolt to restrict the rotation of the raising screw after the calibration block has been raised or lowered to the correct position. This invention, by rotating the rotating support, drives the raising screw to move up and down with the same amplitude, which can avoid the calibration block rising or falling too fast or too slow, thus preventing the calibration parameters from being affected. Furthermore, by changing the specifications of the calibration block, it can be adapted to crystallizers with different cross-sectional dimensions. The structure is simple, easy to use, and improves the calibration accuracy of molten steel level parameters.

[0005] However, in actual implementation, the inventors found that the calibration devices in the prior art usually rely on manual control of the height of the calibration plate during calibration, which results in poor efficiency and accuracy. Summary of the Invention

[0006] To address the aforementioned problems in the existing technology, an embedded automatic calibration device is provided.

[0007] The specific technical solution is as follows: An embedded automatic calibration device includes: Processing module; The processing module is connected to the liquid level sensor and the motor drive module respectively; The motor drive module drives the stepper motor to rotate, thereby changing the height of the calibration plate and affecting the reading of the liquid level sensor. The liquid level sensor outputs a simulated liquid level signal, which is then read and calibrated by the processing module.

[0008] On the other hand, the processing module is connected to the liquid level sensor via an analog quantity acquisition board; The analog acquisition board outputs an excitation signal to the liquid level sensor so that the liquid level sensor can acquire data. The liquid level sensor feeds back the corresponding analog liquid level signal to the analog quantity acquisition board; The analog signal acquisition board samples the simulated liquid level signal and feeds it back to the processing module.

[0009] On the other hand, the analog signal acquisition board includes: An excitation module receives the excitation control signal output by the processing module and converts it into an excitation signal to provide to the liquid level sensor; The sampling module receives the simulated liquid level signal, samples it, and then inputs it into the processing module.

[0010] On the other hand, the processing module is connected to the motor drive module via a 485 communication module.

[0011] On the other hand, the 485 communication module includes: A 485 communication interface, wherein the first pin and the second pin of the 485 communication interface are respectively connected to the eighteenth pin and the seventeenth pin of the 485 communication chip via a first self-resetting fuse and a second self-resetting fuse; A gas discharge tube is connected between the first end of the first self-resetting fuse and the first end of the second self-resetting fuse; A first bidirectional TVS diode is connected to the second end of the first resettable fuse and the second resettable fuse. The second terminal of the first self-resetting fuse is grounded through the second bidirectional TVS diode, the first communication capacitor, and the first communication resistor, respectively. The second terminal of the second self-resetting fuse is grounded through the third bidirectional TVS diode, the second communication capacitor, and the second communication resistor, respectively. The fourth and seventh pins of the 485 communication chip are respectively connected to the processing module.

[0012] On the other hand, the processing module is also connected to an indicator light circuit; The indicator light circuit includes: A first light-emitting diode (LED) has its first terminal connected to a 3.3V power supply circuit, and its second terminal connected to the first terminal of a first indicator resistor. The second terminal of the first indicator resistor is connected to the processing module. The second light-emitting diode has its first end connected to the 3.3V power supply circuit, its second end connected to the first end of the second indicator resistor, and its second end connected to the processing module. The third light-emitting diode has its first end connected to the 3.3V power supply circuit, its second end connected to the first end of the third indicator resistor, and its second end connected to the processing module.

[0013] On the other hand, the processing module is also connected to a battery-powered circuit; The battery power supply circuit includes: A power supply battery, the first end of which is connected to the sixth pin of the processing module via a first power supply resistor; The second terminal of the power supply battery is grounded; The sixth pin of the processing module is also connected to a 3.3V power supply circuit via a second power supply resistor; The sixth pin is also grounded through the first power supply capacitor; The 3.3V power supply circuit is also grounded through multiple power supply capacitors connected in parallel.

[0014] On the other hand, the processing module also includes a debug isolation module, which includes: A first debugging resistor, the first end of which is connected to the processing module, and the second end of which is connected to the debugging interface; A second debugging resistor, the first end of which is connected to the processing module, and the second end of which is connected to the debugging interface; A first debugging bidirectional diode, the first end of the first debugging bidirectional diode is connected to the first end of the first debugging resistor, and the second end of the first debugging bidirectional diode is grounded; The second debugging bidirectional diode has its first end connected to the first end of the second debugging resistor, and its second end grounded.

[0015] On the other hand, the processing module also includes a reset isolation circuit, which includes: A first pull-up resistor, the first end of which is connected to the reset isolation interface, and the second end of which is connected to the processing module; The first end of the first pull-up resistor is grounded through the first reset bidirectional diode, and the second end of the first pull-up resistor is grounded through the first reset resistor; The second pull-up resistor has its first end connected to the reset isolation interface and its second end connected to the processing module. The first end of the second pull-up resistor is grounded through the second reset bidirectional diode, and the second end of the second pull-up resistor is grounded through the second reset resistor; The third pull-up resistor has its first end connected to the reset isolation interface and its second end connected to the processing module. The first end of the third pull-up resistor is grounded through the third reset bidirectional diode.

[0016] On the other hand, the stepper motor drives the calibration plate to move via a ball screw; The stepper motor is also equipped with an encoder.

[0017] The above technical solution has the following advantages or beneficial effects: To address the issue of low accuracy and efficiency in existing liquid level sensor calibration schemes, a stepper motor controlled by a processing module is introduced. The processing module generates drive signals sequentially to move the stepper motor a corresponding distance, and then automatically calibrates by detecting the read value of the liquid level sensor, thereby improving the accuracy and efficiency of calibration. Attached Figure Description

[0018] Embodiments of the invention will be described more fully with reference to the accompanying drawings. However, the drawings are for illustration and explanation only and do not constitute a limitation on the scope of the invention.

[0019] Figure 1 This is an overall schematic diagram of an embodiment of the present invention; Figure 2 This is a schematic diagram of the first part of the processing module in an embodiment of the present invention; Figure 3This is a schematic diagram of the second part of the processing module in an embodiment of the present invention; Figure 4 This is a schematic diagram of the 485 communication module in an embodiment of the present invention; Figure 5 This is a schematic diagram of the indicator light circuit in an embodiment of the present invention; Figure 6 This is a schematic diagram of the debugging isolation module in an embodiment of the present invention; Figure 7 This is a schematic diagram of the reset isolation module in an embodiment of the present invention. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention.

[0023] This invention includes: An embedded automatic calibration device, such as Figures 1 to 3 As shown, it includes: Processing module 1; Processing module 1 is connected to liquid level sensor 5 and motor drive module 3 respectively; The motor drive module 3 drives the stepper motor 4 to rotate, thereby changing the height of the calibration plate and affecting the reading of the liquid level sensor 5. The liquid level sensor 5 outputs a liquid level analog signal for the processing module 1 to read and calibrate.

[0024] Specifically, to address the issue of low accuracy and efficiency in existing liquid level sensor calibration schemes, a stepper motor controlled by a processing module is introduced. The processing module generates drive signals sequentially to move the stepper motor a corresponding distance, and then automatically calibrates by detecting the read value of the liquid level sensor, thereby improving the accuracy and efficiency of calibration.

[0025] Specifically, to achieve a continuous and accurate automatic liquid level calibration process, this embodiment constructs the aforementioned specific embedded automatic calibration device. The processing module 1 is embodied as a microcontroller module with a specific computer program, labeled as chip U3A and chip U3B in the figure, which are connected to the motor drive module 3 via a 485 bus port. Chips U3A and U3B physically correspond to the same microcontroller chip; their network labels have been split for ease of drawing.

[0026] Among them, the motor drive module 3 can drive the stepper motor 4 to rotate at a specific angle. The stepper motor 4 drives the ball screw at the front end to rotate, thereby driving the calibration plate to move to a specific height to simulate the plane of different liquid levels, so that the liquid level sensor 2 can measure different values, and the processing module 1 can measure the corresponding values ​​for calibration.

[0027] In the actual continuous calibration process, each rotation of the stepper motor 4 causes the calibration plate to move a specific step height in the height direction. Then, the liquid level sensor 2 measures the current position height reading. The processing module 1 calculates the position offset of the liquid level sensor 2 at that height according to the ideal state measurement value and the actual position height reading, and stores it to complete the calibration. In actual measurement, the position offset is obtained by looking up a table for compensation.

[0028] In one embodiment, the stepper motor 4 drives the calibration plate to move via a ball screw; An encoder is also installed on stepper motor 4.

[0029] Specifically, in order to achieve better calibration results, the stepper motor 4 in this embodiment is selected to be a model with an incremental encoder. The motor drive module 3 is a closed-loop control circuit based on the encoder. It can read the feedback of the incremental encoder to adjust the duty cycle of the motor drive signal, thereby accurately adjusting the rotation angle of the stepper motor 4 to control the moving height of the calibration board.

[0030] In one embodiment, the processing module 1 is connected to the liquid level sensor 5 via the analog quantity acquisition board 6; The analog acquisition board 6 outputs an excitation signal to the liquid level sensor so that the liquid level sensor can acquire the signal. The liquid level sensor 5 feeds back the corresponding analog liquid level signal to the analog quantity acquisition board 6; The analog signal acquisition board 5 samples the liquid level analog signal and feeds it back to the processing module.

[0031] Analog acquisition board 6 includes: The excitation module 61 receives the excitation control signal output by the processing module 1 and converts it into an excitation signal to provide to the liquid level sensor. The sampling module 62 receives the liquid level simulation signal, samples it, and then inputs it into the processing module.

[0032] Specifically, to acquire the liquid level signal, this embodiment introduces an analog signal acquisition board 6 to acquire the analog liquid level signal. The analog signal acquisition board 6 consists of two parts: an excitation module 61 and a sampling module 62. The excitation module 61 is connected to the 25th pin (TXD2) and the 26th pin (RXD2) of the processing module 1 via serial communication, and is used for transmitting and receiving data with the processing module 1. After the processing module 1 generates the corresponding excitation transmission signal, it generates an excitation signal to drive the liquid level sensor 5 to perform measurement.

[0033] The liquid level sensor 5 outputs an analog signal that is directly detected. The sampling module 62 converts it into a digital signal through a sampling circuit, such as a 12-bit multi-stage comparator, and then feeds it to the 63rd pin TXD6 and the 64th pin RXD6 of the processing module 1 through a serial communication line to complete the sampling process.

[0034] In one embodiment, the processing module 1 is connected to the motor drive module 3 via the 485 communication module 7.

[0035] Specifically, in order to achieve better data acquisition results, in this embodiment, bus communication is introduced through the 485 communication module 7 to connect the motor drive module 3.

[0036] In one embodiment, such as Figure 4 As shown, the 485 communication module 7 includes: The 485 communication interface J5, the first pin of the 485 communication interface J5 and the second pin of the 485 communication interface J5 are respectively connected to the eighteenth pin of the 485 communication chip U32 and the seventeenth pin of the 485 communication chip U32 via the first self-resetting fuse F5 and the second self-resetting fuse F4. A gas discharge tube D44 is connected between the first end of the first self-resetting fuse F5 and the first end of the second self-resetting fuse F4. The second terminal of the first self-resetting fuse F5 and the second terminal of the second self-resetting fuse F4 are connected to the first communication bidirectional TVS diode D43; The second terminal of the first self-resetting fuse F5 is grounded through the second bidirectional TVS diode D42 and the first communication capacitor C110, respectively. The second terminal of the second self-resetting fuse F4 is grounded through the third bidirectional TVS diode D41 and the second communication capacitor C111, respectively. The fourth and seventh pins of the 485 communication chip U32 are connected to the processing module 1, respectively.

[0037] Specifically, in order to achieve better input isolation, in this embodiment, communication with the motor drive module is achieved by connecting to an external 485 communication bus through the 485 communication interface J5.

[0038] In this embodiment, considering the possibility of high-voltage breakdown on the line, a first self-resetting fuse F5 and a second self-resetting fuse F4 are installed on the line between the 485 communication interface J5 and the 485 communication chip U32, which will automatically disconnect in the event of high-voltage breakdown.

[0039] Furthermore, a gas discharge tube D44 is connected between the first end of the first self-resetting fuse F5 and the first end of the second self-resetting fuse F4, and protection is achieved by passing through the gas discharge tube D44 when high voltage occurs on the line.

[0040] To address the issue of online voltage balance, a first communication bidirectional TVS diode D43 is connected across the back ends of the first resettable fuse F5 and the second resettable fuse F4 to achieve online voltage balance and to dissipate online voltage through the first communication resistor R66 as a load.

[0041] In addition, the rear ends of the first self-resetting fuse F5 and the second self-resetting fuse F4 are grounded through the second communication bidirectional TVS diode D42 and the third communication bidirectional TVS diode D41, respectively, to achieve protection when the line is under high voltage, conduct the excess voltage to ground, and prevent backflow of ground surge through bidirectional TVS protection.

[0042] Meanwhile, the rear ends of the first self-resetting fuse F5 and the second self-resetting fuse F4 are grounded through the first communication capacitor C110 and the first communication capacitor C111, respectively, to filter out high-frequency signals.

[0043] Based on this, the rear end of the first resettable fuse F5 is connected to the signal input terminal VIS2 through the second communication resistor R164, and the rear end of the second resettable fuse F4 is grounded through the third communication resistor R159.

[0044] The signal ground terminal VIS2 is also grounded through a set of parallel third communication capacitors C109, fourth communication capacitor C108, fifth communication capacitor C114 and sixth communication capacitor C115.

[0045] The 485 communication chip U32 is powered by the eighth pin VCC and the second pin VCC through a 3.3V power supply circuit. Each power supply terminal is grounded through the seventh communication capacitor C106, the eighth communication capacitor C107, the ninth communication capacitor C112 and the tenth communication capacitor C113 respectively.

[0046] The 485 communication chip U32 mainly communicates serially with the 485 communication chip U32 through the fourth pin RxD and the seventh pin TxD, and the fifth pin RE is used to enable 485 communication with the processing module 1.

[0047] Among them, the fifth pin RE is grounded through the fourth communication resistor R161, the seventh pin TxD is grounded through the fifth communication resistor R160, and the fourth pin RxD is connected to the processing module 1 as a load resistor through the sixth communication resistor R165.

[0048] In one embodiment, such as Figure 5 As shown, processing module 1 is also connected to an indicator light circuit; The indicator light circuit includes: The first light-emitting diode D3 has its first terminal connected to the 3.3V power supply circuit, its second terminal connected to the first terminal of the first indicator resistor R21, and its second terminal connected to the 88th pin of the processing module 1. The second light-emitting diode D6 has its first terminal connected to the 3.3V power supply circuit, and its second terminal connected to the first terminal of the second indicator resistor R11. The second terminal of the second indicator resistor R11 is connected to the eighty-fourth pin of the processing module 1. The third LED D7 has its first terminal connected to the 3.3V power supply circuit, its second terminal connected to the first terminal of the third indicator resistor R19, and its second terminal connected to the 86th pin of the processing module 1.

[0049] Specifically, to achieve better status indication, this embodiment also includes a first LED D3, a second LED D6, and a third LED D7. The anodes of all LEDs point to the 3.3V power supply circuit, and the cathodes are connected to the processing module 1 via a pull-down resistor. The corresponding pins of the processing module 1 maintain a high voltage after power-on to prevent the LEDs from lighting up. When a corresponding prompt signal is needed, a pull-down resistor is applied to turn on the LEDs.

[0050] In one embodiment, such as Figure 3 As shown, processing module 1 is also connected to a battery-powered circuit; The battery-powered circuit includes: The power supply battery BT has its first terminal connected to the sixth pin of the processing module U3B via the first power supply resistor R25. The second terminal of power supply battery B5 is grounded; The sixth pin VBAT of processing module 1 is also connected to the 3.3V power supply circuit through the second power supply resistor R162; The sixth pin is also grounded through the first power supply capacitor C20; The 3.3V power supply circuit is also grounded through multiple power supply capacitors connected in parallel, including the first power supply capacitor C23, the second power supply capacitor C24, the third power supply capacitor C25, the fourth power supply capacitor C26, the fifth power supply capacitor C27, the sixth power supply capacitor C28, and the seventh power supply capacitor C29.

[0051] Specifically, to achieve better power supply performance, this embodiment introduces a dual-power supply method. The processing module 1 can be powered by a battery or by a 3.3V power supply circuit, and pull-up resistors are provided through the first power supply resistor R25 and the second power supply resistor R162. The first power supply resistor R25 and the second power supply resistor R162, together with the eighth power supply capacitor C20, form an RC filter circuit for ripple filtering. In addition, the 3.3V power supply circuit is also filtered by multiple parallel power supply capacitors.

[0052] In one embodiment, such as Figure 6 As shown, the processing module also includes a debug isolation module, which includes: The first debugging resistor R12 is connected to the first end of the processing module 1 and the second end of the first debugging resistor R12 is connected to the debugging interface J3. The second debugging resistor R13 has its first end connected to the processing module 1 and its second end connected to the debugging interface J3. The first debugging bidirectional diode has its first end connected to the first end of the first debugging resistor R12, and its second end grounded. The second debugging bidirectional diode has its first end connected to the first end of the second debugging resistor R13, and its second end grounded.

[0053] In the illustrated embodiment, the first and second debugging bidirectional diodes are disposed in a bidirectional diode module V4.

[0054] Specifically, to facilitate the debugging of the processing module 1, in this embodiment, a specific debugging interface J3 is set as a serial communication interface to connect to an external debugging circuit. The third pin of the debugging interface J3 is grounded, and the first and second pins are connected to the processing module 1 as loads through debugging resistors. At the same time, to avoid the problem of surge on the line, it is also grounded through a bidirectional diode.

[0055] In one embodiment, such as Figure 7 As shown, the processing module also includes a reset isolation circuit, which includes: The first pull-up resistor R16 has its first end connected to the reset isolation interface P1, and its second end connected to the seventy-second pin of the processing module. The first end of the first pull-up resistor R16 is grounded through the first reset bidirectional diode, and the second end of the first pull-up resistor R16 is connected to the 3.3V power supply circuit through the first reset resistor R14. The second pull-up resistor R17 has its first end connected to the reset isolation interface P1 and its second end connected to the seventy-sixth pin of the processing module 1. The first end of the second pull-up resistor R17 is grounded through the second reset bidirectional diode, and the second end of the second pull-up resistor R17 is grounded through the second reset resistor R15. In this embodiment, the first reset bidirectional diode and the second reset bidirectional diode are integrated into the same bidirectional diode module V3.

[0056] The third pull-up resistor R18 has its first end connected to the reset isolation interface and its second end connected to the fourteenth pin of the processing module 1. The first terminal of the third pull-up resistor R18 is grounded through the third reset bidirectional diode V5.

[0057] Specifically, to facilitate the reset operation of the processing module 1, in this embodiment, a first pull-up resistor R16, a second pull-up resistor R17, and a third pull-up resistor R18 are respectively set as loads to connect the reset isolation interface P1 and the corresponding pins of the processing module 1 to realize the communication process, and bidirectional isolation of line surges and ground surges is realized by integrating bidirectional diodes.

[0058] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should recognize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. An embedded automatic calibration device, characterized in that, include: Processing module; The processing module is connected to the liquid level sensor and the motor drive module respectively; The motor drive module drives the stepper motor to rotate, thereby changing the height of the calibration plate and affecting the reading of the liquid level sensor. The liquid level sensor outputs a simulated liquid level signal, which is then read and calibrated by the processing module.

2. The embedded automatic calibration device of claim 1, wherein, The processing module is connected to the liquid level sensor via an analog quantity acquisition board; The analog acquisition board outputs an excitation signal to the liquid level sensor so that the liquid level sensor can acquire data. The liquid level sensor feeds back the corresponding analog liquid level signal to the analog quantity acquisition board; The analog signal acquisition board samples the simulated liquid level signal and feeds it back to the processing module.

3. The embedded automatic calibration device according to claim 2, characterized in that, The analog signal acquisition board includes: An excitation module receives the excitation control signal output by the processing module and converts it into an excitation signal to provide to the liquid level sensor; The sampling module receives the simulated liquid level signal, samples it, and then inputs it into the processing module.

4. The embedded automatic calibration device according to claim 1, characterized in that, The processing module is connected to the motor drive module via a 485 communication module.

5. The embedded automatic calibration device according to claim 4, characterized in that, The 485 communication module includes: A 485 communication interface, wherein the first pin and the second pin of the 485 communication interface are respectively connected to the eighteenth pin and the seventeenth pin of the 485 communication chip via a first self-resetting fuse and a second self-resetting fuse; A gas discharge tube is connected between the first end of the first self-resetting fuse and the first end of the second self-resetting fuse; A first bidirectional TVS diode is connected to the second end of the first resettable fuse and the second resettable fuse. The second terminal of the first self-resetting fuse is grounded through the second bidirectional TVS diode, the first communication capacitor, and the first communication resistor, respectively. The second terminal of the second self-resetting fuse is grounded through the third bidirectional TVS diode, the second communication capacitor, and the second communication resistor, respectively. The fourth and seventh pins of the 485 communication chip are respectively connected to the processing module.

6. The embedded automatic calibration device according to claim 4, characterized in that, The processing module is also connected to an indicator light circuit; The indicator light circuit includes: A first light-emitting diode (LED) has its first terminal connected to a 3.3V power supply circuit, and its second terminal connected to the first terminal of a first indicator resistor. The second terminal of the first indicator resistor is connected to the processing module. The second light-emitting diode has its first end connected to the 3.3V power supply circuit, its second end connected to the first end of the second indicator resistor, and its second end connected to the processing module. The third light-emitting diode has its first end connected to the 3.3V power supply circuit, its second end connected to the first end of the third indicator resistor, and its second end connected to the processing module.

7. The embedded automatic calibration device according to claim 4, characterized in that, The processing module is also connected to a battery power supply circuit; The battery power supply circuit includes: A power supply battery, the first end of which is connected to the sixth pin of the processing module via a first power supply resistor; The second terminal of the power supply battery is grounded; The sixth pin of the processing module is also connected to a 3.3V power supply circuit via a second power supply resistor; The sixth pin is also grounded through the first power supply capacitor; The 3.3V power supply circuit is also grounded through multiple power supply capacitors connected in parallel.

8. The embedded automatic calibration device according to claim 4, characterized in that, The processing module further includes a debug isolation module, which includes: A first debugging resistor, the first end of which is connected to the processing module, and the second end of which is connected to the debugging interface; A second debugging resistor, the first end of which is connected to the processing module, and the second end of which is connected to the debugging interface; A first debugging bidirectional diode, the first end of the first debugging bidirectional diode is connected to the first end of the first debugging resistor, and the second end of the first debugging bidirectional diode is grounded; The second debugging bidirectional diode has its first end connected to the first end of the second debugging resistor, and its second end grounded.

9. The embedded automatic calibration device according to claim 4, characterized in that, The processing module further includes a reset isolation circuit, which includes: A first pull-up resistor, the first end of which is connected to the reset isolation interface, and the second end of which is connected to the processing module; The first end of the first pull-up resistor is grounded through the first reset bidirectional diode, and the second end of the first pull-up resistor is grounded through the first reset resistor; The second pull-up resistor has its first end connected to the reset isolation interface and its second end connected to the processing module. The first end of the second pull-up resistor is grounded through the second reset bidirectional diode, and the second end of the second pull-up resistor is grounded through the second reset resistor; The third pull-up resistor has its first end connected to the reset isolation interface and its second end connected to the processing module. The first end of the third pull-up resistor is grounded through the third reset bidirectional diode.

10. The embedded automatic calibration device according to claim 1, characterized in that, The stepper motor drives the calibration plate to move via a ball screw; The stepper motor is also equipped with an encoder.

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