A sensor calibration method for an electronic back pressure system

Abstract

The present invention provides a calibration method for an electronic back pressure system sensor, which belongs to the field of sensor calibration and includes the following steps: S1, determining the system structure and the fixed dimension value of the system according to the electronic back pressure system; S2, obtaining the weight and angle parameters of the system in the initial form; S3, calibrating the 0 point of the force sensor in the system based on the initial form of the system, and performing an empty cylinder calibration on the angle sensor in the system according to the angle parameters; S4, obtaining the theoretical force value of the force sensor; S5, completing the calibration of the force sensor according to the obtained theoretical force value. The present invention adopts the above-mentioned calibration method for an electronic back pressure system sensor, which is suitable for an electronic back pressure control device. The principle of the method is clear, the steps are simple, and it can be performed synchronously with the calibration process of the angle sensor, thereby greatly simplifying the on-site calibration process of the equipment.

Description

Technical Field

[0001] The invention relates to the technical field of sensor calibration, and in particular to a sensor calibration method for an electronic back pressure system. Background Art

[0002] The back pressure control system of the winding machine is composed of a screw motor, a force sensor and an angle sensor. During its use, the force sensor needs to be calibrated. Based on the special mechanical structure of the back pressure control system of the winding machine, if the existing calibration tools are directly used to calibrate the sensor on-site, the calibration process will be complicated and require a lot of manpower. In addition, there are disadvantages such as inaccurate calibration and the need for auxiliary tools. Summary of the invention

[0003] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide an electronic back pressure system sensor calibration method suitable for an electronic back pressure control device. The method has a clear principle and simple steps, and can be performed synchronously with the calibration process of the angle sensor, thereby greatly simplifying the on-site calibration process of the equipment.

[0004] To achieve the above object, the present invention provides the following solution: a method for calibrating an electronic back pressure system sensor, comprising the following steps:

[0005] S1. Determine the system structure and system fixed dimension value according to the electronic back pressure system;

[0006] S2, obtaining the weight and angle parameters of the system in its initial state;

[0007] S3. Based on the initial state of the system, calibrate the 0 point of the force sensor in the system, and perform an empty cylinder calibration on the angle sensor in the system according to the angle parameter;

[0008] S4, obtaining the theoretical force value of the force sensor;

[0009] S5. According to the obtained theoretical force value, complete the calibration of the force sensor.

[0010] Preferably, in step S1, the system fixed dimensional values ​​include: roller radius r, empty cylinder radius R0, upper rocker arm length L1 of cradle, horizontal distance L3 between roller fulcrum and cradle fulcrum, vertical distance L4 between roller fulcrum and cradle fulcrum, lower rocker arm length L6 of cradle, vertical distance L7 between cradle fulcrum and screw fulcrum, horizontal distance L8 between cradle fulcrum and screw fulcrum.

[0011] Preferably, in step S2, the initial state of the system is the state in which the system naturally rests on the roller in an empty bobbin state, and based on this state, the initial weight G0 of the bobbin and the cradle and the initial angle α0 of the cradle are obtained.

[0012] Preferably, in step S3, the angle parameter is the initial angle α0 of the cradle, and the angle sensor is calibrated with an empty cylinder using the angle parameter, and the obtained empty cylinder calibration value of the angle sensor corresponds to the initial angle α0 of the cradle.

[0013] Preferably, in step S4, obtaining the theoretical force value of the force sensor includes:

[0014] S41, by controlling the screw motor, the cradle in the system is lifted up by an angle Δα to ensure that the bobbin is out of contact with the roller;

[0015] S42. Obtain the Δα value through calculation or actual measurement, or assume that Δα is 0 when the accuracy requirement is low. The lifting angle of the cradle is equal to α0+Δα or equal to the initial angle α0 of the cradle, and the supporting force N of the roller on the yarn tube is 0. The theoretical force value F0 on the force sensor is obtained by calculation based on the fixed dimension value of the system.

[0016] Preferably, in the step S5, the F0 point of the force sensor is calibrated according to the theoretical force value F0 of the force sensor to complete the calibration of the force sensor.

[0017] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0018] The present invention provides an electronic back pressure system sensor calibration method, which is applicable to an electronic back pressure control device. The method has a clear principle and simple steps, and can be performed synchronously with the calibration process of an angle sensor, thereby greatly simplifying the on-site calibration process of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 A flow chart provided for Example 1 of a method for calibrating a sensor of an electronic back pressure system according to the present invention;

[0021] Figure 2 A structural schematic diagram of Example 1 of an electronic back pressure system sensor calibration method provided by the present invention. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] The purpose of the present invention is to provide a calibration method for an electronic back pressure system sensor, which is applicable to an electronic back pressure control device. The method has a clear principle and simple steps, and can be performed synchronously with the calibration process of the angle sensor, thereby greatly simplifying the on-site calibration process of the equipment.

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Example 1

[0026] like Figure 1 As shown, the present invention provides a method for calibrating an electronic back pressure system sensor, comprising the following steps:

[0027] S1. Determine the system structure and system fixed dimension value according to the electronic back pressure system;

[0028] S2, obtaining the weight and angle parameters of the system in its initial state;

[0029] S3. Based on the initial state of the system, calibrate the 0 point of the force sensor in the system, and perform an empty cylinder calibration on the angle sensor in the system according to the angle parameter;

[0030] S4, obtaining the theoretical force value of the force sensor;

[0031] S5. According to the obtained theoretical force value, complete the calibration of the force sensor.

[0032] In this embodiment, the calibration method provided is applicable to an electronic back pressure control device. Based on the traditional precision winding system, the device adds a screw motor and a slider mechanism to control the action of the cradle; and a force sensor to detect the actual back pressure on the bobbin in real time, so as to perform closed-loop feedback control of the electronic back pressure system. At the beginning of the operation of the device, the force sensor needs to be calibrated first to determine the linear relationship between the force value of the sensor and the output electrical signal, so that the system can work normally.

[0033] Based on the above, refer to Figure 2, simplifying the system structure. The fixed dimensions of the system include: roller radius r, empty tube radius R0, upper rocker arm length L1, horizontal distance between roller fulcrum and fulcrum fulcrum L3, vertical distance between roller fulcrum and fulcrum L4, lower rocker arm length L6, vertical distance between fulcrum and screw fulcrum L7, horizontal distance between fulcrum and screw fulcrum L8.

[0034] At the same time, the initial state of the system is that it naturally rests on the roller in the empty bobbin state. In this state, there is an initial weight G0 of the bobbin and the cradle and an initial angle α0 of the cradle. In addition, the theoretical back pressure value of the system (i.e., the supporting force of the roller on the bobbin) is N, and the theoretical force value on the force sensor is F.

[0035] First, according to theoretical analysis, when the system is in an empty drum state and naturally rests on the roller, the theoretical force value F on the force sensor is approximately 0. The output signal of the force sensor in the initial state of the system can be used as the calibration value of the sensor 0 point;

[0036] Secondly, the screw motor is used to slightly lift the cradle to an angle Δα so that the bobbin is out of contact with the roller. At the same time, the Δα value can be obtained by calculation or actual measurement, that is, the lifting angle of the cradle is equal to α0+Δα; or when the accuracy requirement is not high, it can be approximately considered that Δα≈0, α0+Δα≈α0, that is, the lifting angle of the cradle is approximately equal to the initial angle α0 of the cradle, and N=0 at this time. Through theoretical calculation, the theoretical force value F0 on the force sensor at this time can be obtained by r, R0, L1, L3, L4, L6, L7, L8, G0, α0+Δα, and N. The output signal of the force sensor in this state can be used as the calibration value of the sensor F0 point.

[0037] Through the calibration values ​​of the above two points, the calibration of the force sensor can be completed.

[0038] In addition, since the initial angle α0 of the cradle can be used as the empty cylinder calibration value of the angle sensor, the force sensor calibration process proposed in this embodiment can be carried out in coordination with the angle sensor calibration process.

[0039] Therefore, the above-mentioned calibration method of an electronic back pressure system sensor is suitable for an electronic back pressure control device. The principle of this method is clear, the steps are simple, and it can be carried out simultaneously with the calibration process of the angle sensor, thereby greatly simplifying the on-site calibration process of the equipment.

[0040] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0041] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A calibration method for an electronic back pressure system sensor, characterized in that: The following steps are involved: S1. Determine the system structure and system fixed dimension value according to the electronic back pressure system; S2, obtaining the weight and angle parameters of the system in its initial state; S3. Based on the initial state of the system, calibrate the 0 point of the force sensor in the system, and perform an empty cylinder calibration on the angle sensor in the system according to the angle parameter; S4, obtaining the theoretical force value of the force sensor; S5. According to the obtained theoretical force value, the force sensor is calibrated; In step S1, the system fixed dimension values ​​include: roller radius r, empty cylinder radius R0, cradle upper rocker arm length L1, horizontal distance between roller fulcrum and cradle fulcrum L3, vertical distance between roller fulcrum and cradle fulcrum L4, cradle lower rocker arm length L6, vertical distance between cradle fulcrum and screw fulcrum L7, horizontal distance between cradle fulcrum and screw fulcrum L8; In step S2, the initial state of the system is the state in which the system naturally rests on the roller in an empty bobbin state. Based on this state, the initial weight G0 of the bobbin and the cradle and the initial angle α0 of the cradle are obtained; In step S3, the angle parameter is the initial angle α0 of the cradle, and the angle sensor is calibrated with an empty cylinder by using the angle parameter, and the obtained empty cylinder calibration value of the angle sensor corresponds to the initial angle α0 of the cradle; In step S4, obtaining the theoretical force value of the force sensor includes: S41, by controlling the screw motor, the cradle in the system is lifted up by an angle Δα to ensure that the bobbin is out of contact with the roller; S42. Obtain the Δα value through calculation or actual measurement, or assume that Δα is 0 when the accuracy requirement is low. The lifting angle of the cradle is equal to α0+Δα or equal to the initial angle α0 of the cradle, and the supporting force N of the roller on the yarn tube is 0. The theoretical force value F0 on the force sensor is obtained by calculation based on the fixed dimension value of the system.

2. The calibration method of an electronic back pressure system sensor according to claim 1, characterized in that: In step S5, the F0 point of the force sensor is calibrated according to the theoretical force value F0 of the force sensor to complete the calibration of the force sensor.

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