Proportional electromagnet position signal processing method and system

Abstract

The invention discloses a proportional electromagnet position signal processing method and system, and aims at solving the problem that the position of an armature is not accurately analyzed due to the nonlinear corresponding relation between the position of the armature of an existing proportional electromagnet and an output signal of a magnetic sensor. And constructing a compensation table based on the deviation between the sampling points and the proportional straight line, compensating the output signals of the sampling points corresponding to the actual signal output curve of the magnetic sensor, and compensating the output signals between the sampling points corresponding to the actual signal output curve of the magnetic sensor based on the fitting straight line between the adjacent sampling points. The method can effectively improve the linearity of a signal output curve, reduces the linearity error of the signal output curve, reduces the deviation of the signal output curve caused by factors such as assembly error, reduces the difficulty of accurate analysis of the armature position, and improves the accuracy of armature position detection.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnets, and in particular to a method and system for processing position signals of proportional electromagnets. Background Art

[0002] A proportional electromagnet is an electromagnetic device that converts electric current and magnetic force in proportion. It is based on the theory of electromagnetic induction and uses the difference in magnetic field generated by the current in the wire and the magnetic permeability of the iron core to control the current in the wire, thereby realizing the conversion of electrical energy into magnetic energy. Specifically, when an electrical signal is sent and acts on the proportional electromagnet, the proportional electromagnet converts electrical energy into magnetic energy and generates a magnetic field, thereby attracting or repelling the iron core to achieve movement or control of the target object. The internal structure of the proportional electromagnet is relatively simple, mainly consisting of a coil, an armature, a push rod, a guide sleeve, a housing, a pole shoe, etc. Among them, the coil is wound on the surface of the iron core. When a signal is input into the coil, the magnetic field in the coil exerts a force on the armature. The armature moves continuously in the magnetic field in proportion to the size and direction of the signal current, thereby driving the push rod to move, thereby controlling the movement of the valve core.

[0003] The inventor knows a method for realizing position detection of a proportional electromagnet based on a magnetic sensor. When the electromagnet is energized, a magnetic field is generated, and the magnetic sensor can detect the magnetic field. Since the sensor can detect the strength and direction of the magnetic field, when the position of the electromagnet changes, the sensor captures the change in the magnetic field and converts it into an electrical signal and transmits it to a control unit. The control unit can then perform corresponding analysis to obtain the position information of the electromagnet.

[0004] Among them, the output signal of the magnetic sensor changes accordingly with the change of the armature position of the proportional electromagnet. It is usually hoped that the armature position and the output signal of the magnetic sensor will have a linear proportional change relationship to facilitate the calculation of the armature position. However, in the actual production and assembly process of the proportional electromagnet, some process factors, such as the size deviation of the electromagnet, the magnetic property deviation of the magnetic material used, and the deviation of the relative placement position of the magnetic sensor, will cause the output signal of the magnetic sensor to change to a certain extent, resulting in a nonlinear corresponding relationship between the armature position and the sensor signal, which in turn increases the difficulty of accurately parsing the armature position of the proportional electromagnet from the output signal of the magnetic sensor.

[0005] The information disclosed in this background technology section is only used to deepen the understanding of the background technology of the present disclosure, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art known to those skilled in the art. Summary of the invention

[0006] In view of at least one of the above technical problems, the present disclosure provides a proportional electromagnet position signal processing method and system, aiming to solve the problem of inaccurate armature position analyzed therefrom due to the nonlinear correspondence between the existing proportional electromagnet armature position and the output signal of the magnetic sensor.

[0007] According to one aspect of the present disclosure, a method for processing a proportional electromagnet position signal is provided, which comprises the following steps: (1) Before the proportional electromagnet actually works, the armature action of the proportional electromagnet is controlled, and the signal output curve of the magnetic sensor output signal corresponding to the armature position is obtained after signal amplification and biasing; (2) taking the output signal of the magnetic sensor as the object in the signal output curve, sampling the signal output curve at equal intervals to obtain a plurality of sampling points; (3) fitting a proportional straight line corresponding to the signal output curve, calculating the deviation between the sampling point and the proportional straight line and recording the deviation to obtain a compensation table; (4) When the proportional electromagnet is actually working, after the magnetic sensor output signal is amplified and biased, the magnetic sensor output signal corresponding to the sampling point is compensated based on the compensation table, and the magnetic sensor output signal between the sampling points is compensated based on the fitting straight line between adjacent sampling points.

[0008] In some embodiments of the present disclosure, in step (1), the proportional electromagnet is controlled to operate multiple times to obtain corresponding signal output curves, and the average signal output curve is obtained by taking the average value based on the armature position as the final signal output curve.

[0009] In some embodiments of the present disclosure, in step (2), a coordinate system is established for the signal output curve with the armature position as the horizontal axis and the magnetic sensor output signal as the vertical axis, and a number of sampling lines parallel to the horizontal axis are selected at corresponding equal intervals within the range of the signal output curve, and the intersection of the sampling line and the signal output curve is taken as the sampling point.

[0010] In some embodiments of the present disclosure, in step (2), the corresponding sampling line passes through the starting point and the end point of the signal output curve.

[0011] In some embodiments of the present disclosure, in step (3), the proportional straight line passes through the starting point and the end point of the signal output curve.

[0012] In some embodiments of the present disclosure, in step (4), the fitting straight line between two adjacent sampling points corresponds to passing through the two sampling points.

[0013] According to another aspect of the present disclosure, a proportional electromagnet position signal processing system is provided, which is used to implement the above-mentioned proportional electromagnet position signal processing method, and includes a control unit for compensating the proportional electromagnet output signal, a magnetic sensor unit for detecting the armature position, a signal amplification unit electrically connected between the magnetic sensor unit and the control unit, and a bias adjustment unit electrically connected between the control unit and the signal amplification unit.

[0014] In some embodiments of the present disclosure, the signal amplification unit includes an operational amplifier.

[0015] In some embodiments of the present disclosure, the signal amplification unit and the bias adjustment unit respectively include adjustable resistors for correspondingly adjusting the signal amplification factor or the signal bias degree.

[0016] In some embodiments of the present disclosure, the proportional solenoid position signal processing system further includes a sensor power supply unit electrically connected to the control unit and configured to supply power to the magnetic sensor unit.

[0017] One or more technical solutions provided in the embodiments of the present application have at least any of the following technical effects or advantages: Based on the deviation between the sampling points and the proportional straight line, a compensation table is constructed to compensate the output signals of the actual signal output curve of the magnetic sensor corresponding to each sampling point, and based on the fitting straight line between adjacent sampling points, the output signals between the sampling points corresponding to the actual signal output curve of the magnetic sensor are compensated, which can effectively improve the linearity of the signal output curve, and at the same time reduce the linearity error of the signal output curve, reduce the deviation of the signal output curve caused by factors such as assembly errors, reduce the difficulty of accurate analysis of the armature position, and improve the accuracy of the armature position detection. In addition, by amplifying and biasing the output signal of the magnetic sensor, it is beneficial to the compensation and correction of the subsequent signal, and it is also convenient to amplify the signal details and facilitate signal processing and utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the structure of a proportional electromagnet in one embodiment of the present application.

[0019] Figure 2 Schematic diagram of sampling of a magnetic sensor signal output curve in one embodiment of the present application.

[0020] Figure 3 Schematic diagram of the definition of linear error in one embodiment of the present application.

[0021] Figure 4 Schematic diagram showing the comparison of the magnetic sensor output signal before and after processing in one embodiment of the present application.

[0022] Figure 5This is a schematic diagram comparing the linearity errors before and after output signal processing in one embodiment of the present application.

[0023] Figure 6 Schematic diagram of the principle of a proportional electromagnet position signal processing system according to an embodiment of the present application.

[0024] In the above figures, 1 is a magnetic material sleeve, 2 is an excitation coil, 3 is a supporting frame, 41 is a fixed iron core, 42 is a magnetic isolation ring, 5 is an armature, 6 is a pipe cap, 7 is a TMR sensor, 8 is a manual push rod, 91 is a control unit, 92 is a magnetic sensor unit, 93 is a signal amplification unit, 94 is a bias adjustment unit, and 95 is a sensor power supply unit. DETAILED DESCRIPTION

[0025] The programs involved or relied upon in the following embodiments are all conventional programs or simple programs in the technical field, and those skilled in the art can make conventional selections or adaptive adjustments according to specific application scenarios. In order to better understand the technical solution of this application, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] See also Figure 1In this example, the proportional electromagnet includes a magnetic material sleeve 1, an excitation coil 2 and a support frame 3. The magnetic material sleeve 1 is a cylindrical structure made of soft magnetic material with a certain wall thickness. The excitation coil 2 is enclosed in the cylinder wall. The excitation coil 2 is wound by a metal wire (such as copper wire, etc.). The two ends of the coil extend from the cylinder wall of the magnetic material sleeve to connect the control power supply. When the excitation coil 2 is energized, an electromagnetic field is generated, which generates an electromagnetic force on the armature 5, and the action of the proportional electromagnet is realized by this electromagnetic force. Considering that the excitation coil 2 is not easy to be formed due to the thin and soft metal wire during winding, and is easily deformed by external force after winding, in this embodiment, the excitation coil 2 is wound on the support frame 3. The support frame 3 can support the excitation coil 2 on the one hand, and can prevent the excitation coil 2 from being deformed by external force interference on the other hand. In order to realize the on-demand action of the proportional electromagnet, a magnetic core tube is relatively fixedly coaxially penetrated in the hollow magnetic material sleeve 1 to respond to the magnetic field generated by the excitation coil 2 to realize the action of the electromagnet. Specifically, the magnetic core tube includes a fixed iron core 41, a magnetic isolation ring 42, a guide sleeve 43, an armature 5 and a tube cap 6. The fixed iron core 41 is relatively fixedly arranged in the magnetic material sleeve 1, which can concentrate the magnetic field inside the excitation coil, increase the magnetic flux, and thus achieve the purpose of enhancing the magnetic field strength. One end of the fixed iron core 41 is connected to the guide sleeve 43 through the magnetic isolation ring 42, so that the coaxial installation of the armature 5 in the excitation coil is realized through the guide sleeve 43. In this embodiment, the fixed core 41 is a cylindrical structure whose outer edge contour matches the inner edge contour of the magnetic material sleeve. The guide sleeve 43 is coaxially arranged with the fixed core 41 and the outer edge contour of the guide sleeve 43 is consistent with the outer edge contour of the fixed core 41. The armature 5 is movably embedded in the guide sleeve 43. One end of the armature 5 is provided with a guide rod that passes through the central axis of the fixed core 41. The guide rod serves as the action end of the electromagnet. When the excitation coil 2 is energized to generate a magnetic field, the armature 5 is magnetized accordingly, thereby generating an electromagnetic attraction between the armature 5 and the fixed core, thereby realizing the action of the armature 5. Therefore, in this example, the length of the guide sleeve 43 is greater than the designed movement distance of the armature 5. In addition, in order to prevent the armature 5 from falling off from the end of the guide sleeve 43, see Figure 1 A pipe cap 6 is provided at the end of the guide sleeve 43. In order to accurately detect the armature action position in the proportional electromagnet, a magnetic sensor is embedded in the pipe cap. Specifically, a blind hole is opened at the end surface of the pipe cap 6 along the axial direction of the magnetic core tube, i.e., the movement direction of the armature, and a TMR sensor 7 is embedded in the blind hole to seal the blind hole.

[0027] During the actual assembly of the components of the proportional electromagnet, the output signal of the magnetic sensor may change due to process factors, resulting in a nonlinear correspondence between the armature position and the sensor signal, making it difficult to accurately parse the proportional electromagnet armature position from the magnetic sensor output signal. To this end, this example discloses a proportional electromagnet position signal processing method to solve the problem that it is difficult to parse the corresponding armature position from the nonlinear output signal of the magnetic sensor during the existing proportional electromagnet position detection. Specifically, the position signal processing method includes the following steps: (1) Before the proportional electromagnet actually works, the armature action of the proportional electromagnet is controlled, and the signal output curve of the magnetic sensor output signal corresponding to the armature position is obtained after signal amplification and biasing.

[0028] In this embodiment, considering that when the proportional electromagnet armature moves, some factors of the nonlinearity of the magnetic sensor output signal are related to the assembly process and errors of the proportional electromagnet, and there are differences between the assembly individuals of different proportional electromagnets, for this reason, before the proportional electromagnet actually works, the action process of the proportional electromagnet is first tested and recorded to obtain the actual signal output of the magnetic sensor of the current proportional electromagnet under the influence of factors such as its own assembly process error.

[0029] Specifically, in this embodiment, the power supply terminal of the magnetic sensor is connected to a voltage-regulated power supply to ensure the working stability of the magnetic sensor. At the same time, a control current is input to the coil of the proportional electromagnet to control the armature action of the proportional electromagnet. During the action of the armature, the magnetic field inside the proportional electromagnet changes, and the magnetic field change is sensed by the magnetic sensor. Accordingly, the magnetic sensor outputs a signal output curve.

[0030] Taking into account that the output signal range of the magnetic sensor is relatively concentrated, which leads to certain difficulties in processing the output signal, in this embodiment, the output signal of the magnetic sensor is amplified and biased to obtain a signal output curve of the magnetic sensor output model corresponding to the armature action position, wherein the minimum accuracy of signal processing can be correspondingly improved through signal amplification, and the signal bias is used to ensure that the signal output amplitude is all positive, thereby reducing the difficulty of calculation during signal processing.

[0031] In addition, in this embodiment, considering the influence of the material characteristics and assembly factors of the proportional electromagnet parts, there is an amplitude difference between the initial signal output curve corresponding to the output signal of the magnetic sensor and the signal output curve corresponding to the proportional electromagnet after multiple operations. In order to avoid the adverse effect of the difference on the subsequent signal processing, in this embodiment, the proportional electromagnet is controlled to operate multiple times with the same control instruction, so as to obtain multiple signal output curves output by the magnetic sensor to reflect the armature action position, and then, based on the armature action position, the multiple magnetic sensor signals corresponding to the same armature action position are averaged, that is, the multiple signal output curves are averaged, and the average signal output curve is used as the final signal output curve, which is further involved in the subsequent signal processing. In some other embodiments, considering that the proportional electromagnet has been reciprocated for multiple times, the corresponding magnetic sensor output signal will tend to be stable, that is, the proportional electromagnet after multiple operations, the signal output curves corresponding to the magnetic sensor are basically overlapped, and under the premise of meeting the error allowance of this example, this example takes any signal output curve whose signal output curves are basically overlapped after multiple operations as the final signal output curve corresponding to the magnetic sensor.

[0032] (2) In the signal output curve, the output signal of the magnetic sensor is taken as the object, and the signal output curve is sampled at equal intervals to obtain a plurality of sampling points.

[0033] In this embodiment, after the final signal output curve of the magnetic sensor is obtained by mean processing, the signal output curve is sampled so as to facilitate the subsequent segmentation processing of the nonlinear signal output curve. In this example, the signal output curve corresponding to the magnetic sensor is established with the armature position as the horizontal axis and the output signal of the magnetic sensor as the vertical axis to establish a coordinate system, and the signal output curve is sampled in the coordinate system. In this example, 6 sampling lines parallel to the horizontal axis are selected at equal intervals within the range of the signal output curve, and the intersection of the sampling line and the signal output curve is taken as the sampling point. In some other embodiments, other numbers of sampling lines are selected according to the accuracy requirements. In this embodiment, among the 6 sampling lines parallel to the horizontal axis selected at equal intervals, the first and last two sampling lines pass through the starting point and the end point of the signal output curve respectively.

[0034] (3) For the proportional straight line corresponding to the fitted signal output curve, calculate the deviation between the sampling point and the proportional straight line and record it to obtain a compensation table.

[0035] In order to compensate the signal output curve of the magnetic sensor and eliminate the problem of nonlinearity of the signal output curve caused by factors such as proportional electromagnet assembly errors, in this embodiment, after sampling the signal output curve of the magnetic sensor through equally spaced and parallel sampling lines, a proportional straight line with a linear relationship corresponding to the signal output curve is fitted, and then the deviation between the proportional straight line and the signal output curve is calculated. Based on the deviation, the nonlinear signal output curve is compensated to improve the linearity of the compensated signal output curve.

[0036] Specifically, in this embodiment, the starting point and the end point of the magnetic sensor signal output curve are taken as the points passing through the proportional straight line, and a linear proportional straight line is established by corresponding fitting, wherein the first and last sampling points coincide with the starting point and the end point of the signal output curve, that is, the first and last sampling points pass through the proportional straight line, and the deviation between them and the proportional straight line is 0. Since the first and last sampling points, that is, the starting point and the end point of the signal output curve, respectively correspond to the initial moment and the end moment of the armature action, at this time, the armature has just started to move or the movement has ended, and it is relatively less affected by factors such as the assembly error of the proportional electromagnet, so in this example, the proportional straight line passes through the starting point and the end point of the signal output curve and is established by corresponding fitting. Then, the deviations between the remaining sampling points and the fitted proportional straight line in the horizontal direction are calculated respectively, that is, the deviations between the sampling points at the signal output curve along the sampling line and the proportional straight line, and the deviations corresponding to each sampling point are recorded to obtain the LUT compensation table.

[0037] (4) When the proportional electromagnet is actually working, the output signal of the magnetic sensor is amplified and biased, and then the output signal of the magnetic sensor corresponding to the sampling point is compensated based on the compensation table, and the output signal of the magnetic sensor between the sampling points is compensated based on the fitting straight line between adjacent sampling points.

[0038] After obtaining the LUT compensation table in step (3), compensation is performed based on the compensation table when the proportional electromagnet is actually working. Specifically, when the proportional electromagnet coil is energized and the armature is controlled to move accordingly, the magnetic sensor measures the magnetic field change during the armature movement and outputs a signal output curve. Due to the influence of factors such as the assembly of the proportional electromagnet, the signal output curve is a nonlinear curve. The nonlinear curve needs to be compensated to make it linear, so as to analyze the armature movement position according to the signal output amplitude of the magnetic sensor. In this example, the output signal of the magnetic sensor is first amplified and biased to expand the signal amplitude range and ensure that the signal amplitude is positive. The signal amplification ratio and signal bias degree are the same as the amplification ratio and bias degree of the magnetic sensor output signal in the process of obtaining the compensation table. Then, based on the compensation table, the corresponding sampling points at the signal output curve are compensated. In this example, the deviation between each sampling point in the compensation table and the proportional straight line is used as the compensation value to correct the signal output curve. However, due to the limited number of sampling points, it is impossible to compensate the entire signal output curve. Therefore, in this embodiment, for the signal output curve between adjacent sampling points, a fitting straight line is established based on the corresponding adjacent sampling points. The fitting straight line passes through two sampling points, and then the deviation between the signal output curve and the fitting straight line is calculated. The signal output curve is compensated and corrected based on the deviation.

[0039] Therefore, by compensating and correcting the sampling points of the signal output curve through the compensation table and compensating and correcting the signal output curve between adjacent sampling points through the fitting straight line, the linearity error of the magnetic sensor signal output curve can be reduced and the accuracy of proportional electromagnet position detection can be improved.

[0040] In order to verify the reliability of the above-mentioned proportional electromagnet position signal processing method, this example conducts an experimental verification of the above-mentioned signal processing method. Specifically, after the proportional electromagnet is assembled, the proportional electromagnet armature is controlled to move, and after it runs several times, the corresponding signal output curve during the armature movement is obtained through the magnetic sensor, see Figure 2 , and then sample the signal output curve after amplification and bias processing. In this example, 6 points are sampled at equal intervals on the signal output curve, and Figure 2 As shown by the dotted line in the middle, a proportional straight line is established corresponding to the sampling points passing through the starting point and the end point of the signal output curve, and the deviation between each sampling point and the proportional straight line is calculated and recorded to obtain a compensation table. When the proportional electromagnet is actually working, the signal output by the magnetic sensor is compensated, wherein the sampling points on the actual signal output curve are compensated and corrected based on the compensation table, and the actual signal output curve between adjacent sampling points is compensated and corrected based on the fitting straight line between adjacent sampling points.

[0041] Among them, see Figure 3In this embodiment, in order to explain the effectiveness of the above signal processing method, the linearity error is defined, where first the maximum deviation between the proportional straight line corresponding to the signal output curve and the signal output max ( Δ ), and then find the signal output range of the signal output curve V range , then the linearity error of the signal output curve is defined as max ( Δ ) / V range See also Figure 4 The comparison of the magnetic sensor output signal before and after processing is shown. Figure 5 From the comparison of the linearity error of the signal output curve before and after processing, it can be seen that after compensation and correction by the above-mentioned position signal processing method, the output signal of the magnetic sensor is amplified 25 times, and the linearity error is reduced from 18.6% before compensation to 2.0% after compensation through compensation correction after signal bias. The signal output curve shows relatively good linearity, which facilitates the analysis of the armature position and reduces the nonlinearity caused by factors such as assembly and its adverse effects on the armature position accuracy.

[0042] In addition, this example also discloses a proportional electromagnet position signal processing system to achieve amplification and bias processing of the magnetic sensor output signal, see Figure 6 , the position signal processing system includes a control unit 91, through which the output signal of the magnetic sensor is obtained and compensated based on the above compensation method. The magnetic sensor unit 92 is used to measure the change of the magnetic field during the armature movement. In this example, the magnetic sensor unit 92 is composed of four TMR sensors and uses a bridge output. Its output signal is connected to the operational amplifier U1 in the signal amplification unit 93. An adjustable resistor Rv1 is electrically connected between the inverting end and the output end of the operational amplifier. Therefore, by correspondingly adjusting the resistance value of the adjustable resistor Rv1, the amplification factor of the operational amplifier U1 is adjusted to meet the signal amplification requirements. In addition, the control unit 91 is also electrically connected to a bias adjustment unit 94, which includes an operational amplifier U2. The output end of the operational amplifier U2 is connected to the in-phase end of the operational amplifier U1 through the adjustable resistor Rv2, thereby realizing the amplitude adjustment of the magnetic sensor input signal and realizing signal bias. Among them, the adaptive adjustment of the bias size can be achieved through the adjustable resistor Rv2. In addition, in order to realize stable power supply to the magnetic sensor, in this example, the sensor power supply unit including the voltage follower U3 realizes stable power supply to the magnetic sensor unit, so as to avoid the error of its output signal caused by the power supply stability. Therefore, the output signal of the magnetic sensor is amplified and biased as required by the proportional electromagnet position signal processing system, so as to facilitate subsequent compensation correction.

[0043] Although some preferred embodiments of the present disclosure have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0044] Obviously, those skilled in the art can make various changes and modifications to the present disclosure without departing from the spirit and scope of the present invention. Thus, if these modifications and variations to the present disclosure fall within the scope of the claims of this application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A method for processing a proportional electromagnet position signal, characterized in that: The steps include: (1) Before the proportional electromagnet actually works, the armature action of the proportional electromagnet is controlled, and the signal output curve of the magnetic sensor output signal corresponding to the armature position is obtained after signal amplification and biasing; (2) taking the output signal of the magnetic sensor as the object in the signal output curve, sampling the signal output curve at equal intervals to obtain a plurality of sampling points; (3) fitting a proportional straight line corresponding to the signal output curve, calculating the deviation between the sampling point and the proportional straight line and recording the deviation to obtain a compensation table; (4) When the proportional electromagnet is actually working, after the magnetic sensor output signal is amplified and biased, the magnetic sensor output signal corresponding to the sampling point is compensated based on the compensation table, and the magnetic sensor output signal between the sampling points is compensated based on the fitting straight line between adjacent sampling points.

2. The method for processing a proportional electromagnet position signal according to claim 1, characterized in that: In the step (1), the proportional electromagnet is controlled to run multiple times to obtain corresponding signal output curves, and the average signal output curve is obtained based on the average of the armature position as the final signal output curve.

3. The method for processing a proportional electromagnet position signal according to claim 1, characterized in that: In the step (2), the signal output curve establishes a coordinate system with the armature position as the horizontal axis and the magnetic sensor output signal as the vertical axis, and a number of sampling lines parallel to the horizontal axis are selected at corresponding equal intervals within the range of the signal output curve, and the intersection of the sampling line and the signal output curve is sampled as the sampling point.

4. The method for processing a proportional electromagnet position signal according to claim 3, characterized in that: In the step (2), the corresponding sampling line passes through the starting point and the end point of the signal output curve.

5. The method for processing a proportional electromagnet position signal according to claim 4, characterized in that: In step (3), the proportional straight line passes through the starting point and the end point of the signal output curve.

6. The method for processing a proportional electromagnet position signal according to claim 1, characterized in that: In the step (4), the fitting straight line between two adjacent sampling points passes through the two sampling points.

7. A proportional electromagnet position signal processing system, characterized in that: Used to implement the proportional electromagnet position signal processing method described in claim 1, it includes a control unit for compensating the proportional electromagnet output signal, a magnetic sensor unit for detecting the armature position, a signal amplification unit electrically connected between the magnetic sensor unit and the control unit, and a bias adjustment unit electrically connected between the control unit and the signal amplification unit.

8. The proportional electromagnet position signal processing system according to claim 7, characterized in that: The signal amplifying unit includes an operational amplifier.

9. The proportional electromagnet position signal processing system according to claim 7 or 8, characterized in that: The signal amplification unit and the bias adjustment unit respectively include adjustable resistors for correspondingly adjusting the signal amplification factor or the signal bias degree.

10. The proportional electromagnet position signal processing system according to claim 7, characterized in that: A sensor power supply unit is also included, which is electrically connected to the control unit and is used to supply power to the magnetic sensor unit.

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