Constant pressure control device and method for paper smoothness detection

Abstract

This invention provides a constant pressure control device and method for paper smoothness detection, belonging to the field of paper smoothness detection. It includes: a pressurizing module for moving under equipment control to generate the required contact pressure; a distance recording module for collecting the movement stroke of the pressurizing module; a pressure measuring module for measuring the pressure generated by the pressurizing module; a pressure control module for determining the real-time pressure change of the object being tested during smoothness detection based on the movement stroke data collected by the distance recording module and the pressure data measured by the pressure measuring module; and a signal output module for outputting the pressure detection results and providing usage prompts. Through real-time dual monitoring of pressure and stroke, it ensures that the contact pressure remains stable within the national standard range of 100±2 kPa, eliminating detection errors caused by pressure fluctuations at the source.

Description

Technical Field

[0001] This invention belongs to the field of paper smoothness detection, and particularly relates to a constant pressure control device and method for paper smoothness detection. Background Technology

[0002] Paper smoothness is an important indicator for evaluating the flatness of paper surface, directly affecting printing quality and writing performance. Currently, paper smoothness testing typically uses the air leakage method. This method involves allowing air to pass through the gap between the paper surface and a glass anvil under a certain pressure, and measuring the time or flow rate of the air leakage to assess the paper's smoothness.

[0003] In traditional paper smoothness testing equipment, the pressure device usually uses a fixed weight to apply pressure. However, this method has many drawbacks: on the one hand, the fixed weight makes the equipment bulky and inconvenient to transport and operate; on the other hand, after long-term use, the mechanical parts of the pressure device are prone to wear and deformation, resulting in unstable pressure applied to the paper, which cannot be accurately controlled within the range required by national standards, usually 100±2 kPa, thus affecting the accuracy and repeatability of the test results.

[0004] Furthermore, most existing testing equipment only monitors the stroke of the pressurizing device to determine whether the pressure has been applied sufficiently, ignoring actual pressure changes. When the paper thickness is uneven, mechanical parts are worn, or other abnormalities occur, even if the stroke is complete, the actual applied pressure may deviate from the target value, leading to distorted test results.

[0005] For example, a Chinese patent discloses an online soft measurement method and device for paper smoothness, with publication number CN102564362A. The principle of this patent is as follows: first, the basis weight of the paper is measured; then, the variance of the basis weight is calculated based on the basis weight; finally, a radial neural network model is used to fit the correspondence between the variance of the basis weight and the paper smoothness, thereby obtaining the paper smoothness. Summary of the Invention

[0006] The purpose of this invention is to address the above-mentioned problems by providing a constant pressure control device for paper smoothness detection; The purpose of this invention is to address the above-mentioned problems by providing a constant pressure control method for paper smoothness detection.

[0007] To achieve the above objectives, the present invention adopts the following technical solutions: A constant pressure control device for paper smoothness detection, comprising: The pressurization module is used to move under the control of the equipment to generate the required contact pressure; A distance recording module is used to collect the movement stroke of the pressurization module; A pressure measurement module is used to measure the pressure generated by the pressurization module; The pressure control module is used to determine the real-time pressure change of the detected object during the smoothness detection process based on the motion travel data collected by the distance recording module and the pressure data measured by the pressure measurement module. The signal output module is used to output the pressure detection results and provide usage prompts.

[0008] In the constant pressure control device for paper smoothness detection described above, the pressure control module is specifically used to: determine whether the contact force applied by the pressure module to the object being tested is constant based on the force value data of the pressure measurement module and the motion stroke data of the pressure module collected by the distance recording module.

[0009] In the constant pressure control device for paper smoothness detection described above, if the force value data of the pressure measurement module is not displayed or continues to increase but fails to remain stable within a set time period, it is determined that the pressure module and the object being detected are not in contact, and the pressure control module continues to drive the pressure module to move.

[0010] In the constant pressure control device for paper smoothness detection described above, if the distance recording module collects the travel distance of the pressurizing module, but the pressurizing module has not reached the set position, it is determined that the movement of the pressurizing module has not been completed and that it has not made contact with the object being tested.

[0011] A constant pressure control method for paper smoothness detection includes the following steps: The movement stroke of the pressurization module is collected; Measure the pressure generated by the pressurization module; Based on the pressure generated by the pressurization module and its movement stroke, the real-time pressure on the detected object is determined, and a usage prompt is displayed on the signal output module according to the determination result.

[0012] In the aforementioned constant pressure control method for paper smoothness detection, the step of "determining the real-time pressure on the object being tested based on the pressure generated by the pressurizing module and its movement stroke" includes: If the force value data of the pressure measurement module is not displayed or continues to increase but fails to remain stable within the set time, it is determined that the movement of the pressurization module is not completed and has not made contact with the object being measured.

[0013] In the aforementioned constant pressure control method for paper smoothness detection, the step of "determining the real-time pressure on the object being tested based on the pressure generated by the pressurizing module and its movement stroke" further includes: If the travel data of the pressurization module collected by the distance recording module exceeds or falls below the predetermined threshold in the calibration mode, it is determined that the pressure value for paper smoothness detection does not meet the requirements, and the signal output module issues a corresponding alarm.

[0014] The constant pressure control method for paper smoothness detection described above also includes a calibration mode step: In calibration mode, by adjusting the pre-pressure of the pressurization module, the force value displayed by the pressure measurement module is stabilized within the target pressure range, and the corresponding position information is recorded in the distance recording module, thus completing the constant pressure calibration.

[0015] In the above-mentioned constant pressure control method for paper smoothness detection, the target pressure range is 100±2kPa.

[0016] In the constant pressure control method for paper smoothness detection described above, when the data from both the distance recording module and the pressure measuring module fail to reach the preset value, it is determined that the pressure application module has not applied the required pressure, and pressure is continued to be applied. When the data from both the distance recording module and the pressure measurement module reach the preset value, it is determined that the pressure has been applied in place, the pressure is stopped, and the smoothness test begins. During the smoothness detection process, if the value of the pressure measurement module deviates from the target pressure range, the detection is deemed unqualified and an alarm is triggered.

[0017] Compared with existing technologies, the advantages of this invention are: Improved accuracy: By monitoring both pressure and stroke in real time, the contact pressure is ensured to remain stable within the national standard range of 100±2kPa, eliminating detection errors caused by pressure fluctuations at the source.

[0018] Enhanced reliability: The system employs a dual judgment mechanism based on pressure and stroke to avoid misjudgment of a single signal, effectively addressing long-term usage issues such as mechanical wear and position drift, and improving system stability. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the control flow of the present invention; Figure 2 It is a control key steps diagram; Figure 3 This is a flowchart illustrating the control method. Figure 4 This is a schematic diagram of the device under pressure. Figure 5 This is an external view of the device under pressure. Figure 6 This is a schematic diagram of the device in the depressurized state; Figure 7 This is an external view of the device in its depressurized state. In the diagram: Pressurization module 01, pressure measurement module 02, distance recording module 03, pressure control module 04, signal output module 05. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 A flowchart illustrating the control method of a constant pressure control device for paper smoothness detection provided in this application embodiment is shown below. Figure 1 As shown, the device includes at least the following modules: The system comprises a pressurization module 01, a pressure measurement module 02, a distance recording module 03, a pressure control module 04, and a signal output module 05. Each module corresponds to a specific effect and function, and the combination of all modules enables constant pressure control in smoothness detection.

[0022] Among them, the pressurization module 01 is used to move under the control of the equipment to generate the required contact pressure; Pressure measurement module 02 is used to measure the pressure generated by the pressurization module; Distance recording module 03 is used to collect the motion stroke of the pressurization module; The pressure control module 04 is used to determine the real-time pressure change of the object being tested during the smoothness detection process based on the distance recording data and the pressure generated by the pressurization module.

[0023] Signal output module 05 is used to output the pressure detection results and provide usage prompts.

[0024] like Figure 4 As shown, the pressurization module 01 is a motor-driven device with an internal cam mechanism to realize the reciprocating motion of the pressurization head and to apply uniform pressure to the object being tested using the elastic force of the spring.

[0025] like Figure 4 As shown, the pressure measurement module 02 is a thin pressure sensor with small size and low power consumption, which can realize real-time and precise pressure monitoring.

[0026] like Figure 6 As shown, the distance recording module 03 is an optocoupler-type photoelectric sensor with strong anti-interference capability and sensitive response. Figure 4 and Figure 6 The diagram shows two different states of the pressurization module. Figure 4 and Figure 5 Both indicate that the pressurization module is in a pressurization state. Figure 6 and Figure 7All pressurization modules are in the depressurization state.

[0027] like Figure 6 As shown, the pressure control module 04 controls the movement of the pressurization module in real time based on the data from the pressure measurement module and the distance recording module. Therefore, the pressure control module needs to be implemented using a combination of hardware and software.

[0028] like Figure 7 As shown, the signal output module 05 is a touch-sensitive intelligent display screen, which mainly displays the data from the pressure control module, the force value data from the pressure detection module, and the distance recording module. It can also display alarms for abnormal force value data that occurs during the detection process, making it convenient for users to check during use. Its real-time data display feature will greatly improve the data stability in smoothness detection, ensuring that the surface of the object being tested is subjected to a contact pressure of 100±2Kpa each time.

[0029] In this application example, the constant pressure control device includes a pressurization module, a pressure measurement module, a distance recording module, a pressure control module, and a signal output module. Through the cooperation between these modules, constant pressure control is achieved when the object being tested is subjected to smoothness detection.

[0030] This application provides a constant pressure control method for paper smoothness detection, as detailed below: Calibration mode: When the paper smoothness testing instrument is calibrated, the bolt and spring structure on the pressure module is used to apply a pre-pressure to the test object, so that the pressure measurement module 02 can detect the real-time force value data and record the position information on the distance recording module. When the data displayed on the signal output module 05 is stable at about 100±2Kpa, the constant pressure calibration of the testing instrument is completed in this state.

[0031] Detection mode: When using the paper smoothness testing instrument, if the data from both the distance recording module and the pressure measurement module do not reach the preset value, the software will determine that the pressure module has not applied the required pressure to the object being tested. The pressure control module will continue to apply pressure, and the signal output module will display that pressure is being applied.

[0032] When the distance recording module is in position and the pressure measurement module detects that the force value has reached the predetermined value, the result is that the pressurization module has made contact with the object being tested. The pressure control module then stops pressurizing, and the signal output module displays that the smoothness test is in progress.

[0033] Once the smoothness of the object being tested has been completed, the pressure control module controls the pressurization device to release pressure in a timely manner, and the distance recorder records the movement of the pressurization device. Combined with the data from the pressure measurement module, this ensures that the pressure release action can operate normally.

[0034] If the object being tested is already undergoing smoothness testing, but the pressure value collected by the pressure control module on the signal output module is higher or lower than 100±2Kpa, it indicates that the smoothness test is unqualified, and the signal output module will issue a corresponding alarm.

[0035] If the pressurization module moves under the control of the pressure control module, but the distance recording data collected by the signal output module deviates significantly from the predetermined value, it indicates that the pressurization module's operation has not met the requirements, and the signal output module will issue a corresponding prompt.

[0036] This application proposes a constant pressure control device for paper smoothness detection. The method of controlling constant pressure is to collect and measure real-time pressure data and movement stroke, and then detect and control the pressure output by the pressure module to ensure that the pressure on the tested object is constant during each smoothness detection.

[0037] The main control steps of this control method are as follows: Figure 2 As shown, it includes the following steps: In step S101, the pressure generated by the pressurization module is measured.

[0038] Based on the above, the thin pressure sensor used in this application example has the function of pressure detection, providing real-time pressure value signals for the operation of the pressurization module.

[0039] In step S102, the motion stroke of the pressurization module is collected.

[0040] In this application example, since the pressurization module is a module consisting of a cam and a spring structure, and is equipped with a compression spring inside, the motion stroke of the pressurization module can also be interpreted as the motion process of the cam and the spring.

[0041] In step S103, the contact force applied by the pressurizing module is detected in real time based on the pressure and motion stroke data generated by the pressurizing module, and the movement of the pressurizing module is controlled according to the detection results.

[0042] Based on pressure detection and distance acquisition, the pressure control module determines the pressure applied by the pressurization module to the detected object and provides subsequent motion signals based on the determination result.

[0043] In step S104, the pressure detection results are output and usage prompts are provided.

[0044] Furthermore, in order to clearly demonstrate the constant pressure control method of this application example, after summarizing and analyzing the pressure detection results, distance recording and other data, reasonable constant pressure motion process prompts are given to ensure that the pressure remains constant during the paper smoothness detection process.

[0045] It should be noted that the pressure mentioned in the examples of this application may also be pressure intensity. When the numerical value represents pressure intensity, it is converted into a form based on the contact area between the pressurization module and the object being tested.

[0046] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0047] Although this document frequently uses terms such as pressurization module 01, pressure measurement module 02, distance recording module 03, pressure control module 04, and signal output module 05, these terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would be contrary to the spirit of the invention.

Claims

1. A constant pressure control device for detecting paper smoothness, characterized in that, include: The pressurization module (01) is used to move under the control of the equipment to generate the required contact pressure; Distance recording module (03) is used to collect the motion stroke of the pressurization module; The pressure measurement module (02) is used to measure the pressure generated by the pressurization module; The pressure control module (04) is used to determine the real-time pressure change of the detected object during the smoothness detection process based on the motion travel data collected by the distance recording module and the pressure data measured by the pressure measurement module. The signal output module (05) is used to output the pressure detection results and provide usage prompts.

2. The constant pressure control device for paper smoothness detection according to claim 1, characterized in that, The pressure control module (04) is specifically used to: determine whether the contact force applied by the pressure module (01) to the object being tested is constant based on the force value data of the pressure measurement module (02) and the motion stroke data of the pressure module collected by the distance recording module (03).

3. The constant pressure control device for paper smoothness detection according to claim 2, characterized in that, If the force value data of the pressure measurement module (02) is not displayed or continues to increase but fails to remain stable within the set time period, it is determined that the pressurization module (01) has not made contact with the object being tested, and the pressure control module (04) continues to drive the pressurization module (01) to move.

4. The constant pressure control device for paper smoothness detection according to claim 2, characterized in that, If the distance recording module (03) collects the movement stroke of the pressurizing module, but it does not reach the set position, then it is determined that the movement of the pressurizing module (01) is not completed and it has not made contact with the object being measured.

5. A constant pressure control method for paper smoothness detection, applied to the apparatus as described in any one of claims 1 to 4, characterized in that, Includes the following steps: The movement stroke of the pressurization module (01) is collected; Measure the pressure generated by the pressurization module (01); Based on the pressure generated by the pressurization module (01) and its movement stroke, the real-time pressure on the detected object is determined, and a usage prompt is made on the signal output module (05) based on the determination result.

6. The constant pressure control method for paper smoothness detection according to claim 5, characterized in that, The steps in "determining the real-time pressure on the detected object based on the pressure generated by the pressurization module and its movement stroke" include: If the force value data of the pressure measurement module (02) is not displayed or continues to increase but fails to remain stable within a set time, it is determined that the movement of the pressurization module (01) is not completed and has not made contact with the object being measured.

7. The constant pressure control method for paper smoothness detection according to claim 5, characterized in that, The step of "determining the real-time pressure on the detected object based on the pressure generated by the pressurization module and its movement stroke" further includes: If the travel data of the pressurization module collected by the distance recording module (03) exceeds or falls below the predetermined threshold in the calibration mode, it is determined that the pressure value of the paper smoothness detection does not meet the requirements, and the signal output module (05) issues a corresponding alarm prompt.

8. The constant pressure control method according to any one of claims 5 to 7, characterized in that, It also includes calibration mode steps: In calibration mode, by adjusting the pre-pressure of the pressurization module (01), the force value displayed by the pressure measurement module (02) is stabilized within the target pressure range, and the corresponding position information is recorded in the distance recording module (03) to complete the constant pressure calibration.

9. The constant pressure control method according to claim 8, characterized in that, The target pressure range is 100±2 kPa.

10. The constant pressure control method according to any one of claims 5 to 7, characterized in that, In detection mode: When the data from both the distance recording module (03) and the pressure measurement module (02) fail to reach the preset value, it is determined that the pressurization module (01) has not applied the required pressure, and pressurization continues. When the data from the distance recording module (03) and the pressure measurement module (02) both reach the preset value, it is determined that the pressure has been applied in place, the pressure is stopped and the smoothness test is started; During the smoothness detection process, if the value of the pressure measurement module (02) deviates from the target pressure range, the detection is deemed unqualified and an alarm is triggered.

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