A synchronous sensing vibration perception threshold precision measuring instrument and a measuring method

Abstract

The application discloses a kind of synchronous sensing's vibration sense threshold precision measuring instrument and measurement method, it is related to detection instrument technical field, including integrated probe assembly, contact force monitoring module, signal controller assembly and man-machine interaction unit;Integrated probe assembly includes built-in shell, exciter, integrated ceramic probe, displacement sensor probe and displacement sensor receiver, exciter and displacement sensor receiver are fixed on the same base bracket of built-in shell with common base rigidity, integrated ceramic probe is coaxially installed at the central axis of exciter, displacement sensor probe and displacement sensor receiver are electrically connected.The application uses the above-mentioned one synchronous sensing's vibration sense threshold precision measuring instrument and measurement method, solves the defects of large measurement error of traditional open-loop equipment, low data reliability, low-frequency measurement sensitivity is poor, calibration is complex, greatly improves the precision, repeatability and traceability of vibration sense threshold measurement.

Description

Technical Field

[0001] This invention relates to the field of detection instrument technology, and in particular to a precision measuring instrument and method for synchronous sensing vibration threshold. Background Technology

[0002] Precisely measuring the vibration perception threshold of human skin is one of the core non-invasive detection methods for the early diagnosis of peripheral neuropathy. The International Organization for Standardization has also formulated strict measurement specifications for this purpose. The core requirement of this scenario is to obtain traceable, repeatable, and accurate objective detection data.

[0003] Currently, most mainstream vibration threshold measurement devices in the industry adopt an open-loop control mode, which indirectly calculates the intensity of vibration stimulation by recording only the electrical signal that drives the vibration probe. The core principle is that the driving electrical signal is proportional to the actual mechanical vibration displacement of the probe. Summary of the Invention

[0004] The purpose of this invention is to provide a precision measuring instrument and method for vibration threshold measurement with synchronous sensing, which solves the defects of traditional open-loop equipment such as large measurement error, low data reliability, poor low-frequency measurement sensitivity, and complex calibration, and greatly improves the accuracy, repeatability and traceability of vibration threshold measurement.

[0005] This invention provides a precision measuring instrument for vibration perception threshold with synchronous sensing, comprising an integrated probe assembly, a contact force monitoring module, a signal controller assembly, and a human-machine interface unit. The integrated probe assembly includes an inner shell, a vibrator, an integrated ceramic probe, a displacement sensor probe, and a displacement sensor receiver. The vibrator and the displacement sensor receiver are rigidly fixed to the same base bracket of the inner shell. The integrated ceramic probe is coaxially mounted at the central axis of the vibrator. The displacement sensor probe and the displacement sensor receiver are electrically connected. The contact force monitoring module includes a surrounding platform, a pressure sensor, and a visual feedback component. The surrounding platform is coaxially arranged around the outer periphery of the integrated ceramic probe. The pressure sensor is drivenly connected to the surrounding platform. The visual feedback component is electrically connected to the signal controller assembly. The signal controller assembly is electrically connected to the vibrator, the displacement sensor receiver, the pressure sensor, and the human-machine interface unit, respectively.

[0006] Preferably, the radial distance between the center of the displacement sensor probe and the center edge of the integrated ceramic probe is 0.5 mm.

[0007] Preferably, the distance between the detection center axial surface of the pressure sensor and the upper plane of the surrounding platform is 14.3 mm, and the detection range of the pressure sensor covers the standard contact pressure range of 0.7 N to 2.1 N.

[0008] Preferably, the visual feedback component includes an acrylic light-transmitting panel and an LED feedback light. The acrylic light-transmitting panel is coaxially mounted with the device housing, the LED feedback light is coaxially arranged with the acrylic light-transmitting panel, and the LED feedback light is electrically connected to the signal controller assembly.

[0009] Preferably, the signal controller assembly has a built-in data filtering module.

[0010] Preferably, the signal controller assembly has a built-in exciter drive control module.

[0011] Preferably, the human-machine interaction unit includes a hand-held switch, which is electrically connected to the signal controller assembly.

[0012] A precision measuring instrument and method for synchronously sensing vibration perception threshold includes the following steps: Step S1, Contact Force Pre-detection: Place the part to be tested on the surrounding platform. The pressure sensor collects the contact pressure between the part to be tested and the platform in real time and transmits it to the signal controller assembly. The visual feedback component outputs the corresponding visual feedback signal according to whether the contact pressure is within the standard range of 0.7N~2.1N. Step S2, Test Start Judgment: The signal controller assembly determines that the test start condition is met and automatically starts the vibration test process only when the contact pressure is stable within the standard range and reaches the preset time; if the contact pressure exceeds the standard range, the system will not start or will pause the test. Step S3, Vibration Stimulation and Synchronous Acquisition: After the start-up conditions are met, the signal controller assembly drives the exciter to output vibration stimulation with a gradually changing frequency from 4Hz to 125Hz according to the preset program. At the same time, the displacement sensor probe and the displacement sensor receiver synchronously acquire the real vibration displacement data of the integrated ceramic probe. The contact pressure data and the subjective feedback signal input by the subject through the human-computer interaction unit are recorded synchronously throughout the process, and a unified time mark is added to all data. Step S4, invalid data screening: After the test is completed, the signal controller assembly automatically screens out the vibration displacement data and subjective feedback data collected during the period when the contact pressure exceeds the standard range according to the time stamp, and retains the valid data under the standard pressure throughout the process; Step S5, Threshold Calculation: Based on the effective vibration displacement data and the corresponding subjective feedback signal, the vibration perception threshold of the subject in the corresponding frequency band is calculated through coupling analysis using a preset algorithm.

[0013] Therefore, the present invention adopts the above-mentioned synchronous sensing vibration threshold precision measuring instrument and measurement method, which solves the defects of traditional open-loop equipment such as large measurement error, low data reliability, poor low-frequency measurement sensitivity and complex calibration, and greatly improves the accuracy, repeatability and traceability of vibration threshold measurement.

[0014] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0015] Fig. 1 This is a schematic diagram of the overall structure of a synchronous sensing vibration threshold precision measuring instrument according to the present invention. Fig. 2 This is a flowchart illustrating the measurement method of a synchronous sensing vibration threshold precision measuring instrument according to the present invention.

[0016] Figure Labels 1. Integrated ceramic probe; 2. Surround platform; 3. Acrylic light-transmitting plate; 4. LED feedback light; 5. Displacement sensor probe; 6. Device housing; 7. Pressure sensor; 8. Internal housing; 9. Vibrator; 10. Measurement platform; 11. Mounting plate; 12. Base; 13. Vibrator mounting aluminum plate; 14. Displacement sensor; 15. Signal controller assembly; 16. Handheld switch. Detailed Implementation

[0017] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0019] The terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0020] Example 1 like Figs. 1-2 As shown, the present invention provides a synchronous sensing vibration threshold precision measuring instrument, which includes an integrated probe assembly, a contact force monitoring module, a signal controller assembly 15, and a human-machine interaction unit. The integrated probe assembly is the core component for achieving precise vibration stimulation and displacement measurement. It includes an internal housing 8, a vibrator 9, an integrated ceramic probe 1, a displacement sensor probe 5, and a displacement sensor receiver 14. The internal housing 8 is a precision-machined aluminum alloy shell with an integrated base support inside. The vibrator 9 and the displacement sensor receiver 14 are rigidly fixed to the same base support of the internal housing 8, ensuring that relative positional accuracy is directly guaranteed by machining precision. This eliminates the cumulative errors caused by assembling multiple components, forming an integrated mechanical module that is insensitive to external interference and highly stable in its own state.

[0021] The integrated ceramic probe 1 is coaxially mounted on the central axis of the vibrator 9. The displacement sensor probe 5 is electrically connected to the displacement sensor receiver 14. The displacement sensor probe 5 is non-contact, and its detection end is aligned with the moving part of the measurement platform 10 to collect the real vibration displacement data of the integrated ceramic probe 1 in real time.

[0022] The radial distance between the center of the displacement sensor probe 5 and the center edge of the integrated ceramic probe 1 is 0.5 mm, which ensures micron-level displacement detection accuracy and completely avoids interference with the moving parts of the probe.

[0023] The contact force monitoring module includes a surrounding platform 2, a pressure sensor 7, and a visual feedback component. The surrounding platform 2 is coaxially mounted around the outer periphery of the integrated ceramic probe 1, forming a support plane for the subject to place their finger or other contact area to be tested. The pressure sensor 7 is connected to the surrounding platform 2 and is used to detect the contact pressure between the contact area to be tested and the surrounding platform 2 in real time. The distance between the detection center axial plane of the pressure sensor 7 and the upper plane of the surrounding platform 2 is 14.3 mm, and the detection range of the pressure sensor 7 covers the standard contact pressure range of 0.7 N to 2.1 N.

[0024] The visual feedback component is electrically connected to the signal controller assembly 15 and is used to output a visual feedback signal based on the detection result of the contact pressure. The visual feedback component includes an acrylic light-transmitting plate 3 and an LED feedback lamp 4. The acrylic light-transmitting plate 3 is coaxially mounted with the device housing 6, and the LED feedback lamp 4 is coaxially arranged with the acrylic light-transmitting plate 3, with a distance of 5mm between the lowest plane of the LED feedback lamp 4 and the acrylic light-transmitting plate 3. The LED feedback lamp 4 is electrically connected to the signal controller assembly 15 and is used to output a green light signal when the contact pressure is within the standard range of 0.7N to 2.1N, and output a red light signal when the contact pressure exceeds the standard range.

[0025] The signal controller assembly 15 is electrically connected to the vibrator 9, the displacement sensor receiver 14, the pressure sensor 7, and the human-machine interface unit. The signal controller assembly 15 controls the start and stop of the vibrator 9 based on the contact pressure detection results, synchronously collects vibration displacement data and feedback signals from the human-machine interface unit, and calculates the vibration perception threshold. The signal controller assembly 15 has a built-in data filtering module. This module adds a unified time stamp to the real-time collected vibration displacement data, contact pressure data, and feedback signals from the human-machine interface unit. Based on the time stamp, it automatically filters out invalid data within periods when the contact pressure exceeds the standard range, using only valid data collected within the standard pressure range for vibration perception threshold calculation.

[0026] The signal controller assembly 15 incorporates a vibrator drive control module. This module drives the vibrator 9 to output progressively variable frequency vibration stimulation in the 4Hz~125Hz frequency band. It also includes a dynamic closed-loop control algorithm to compensate for low-frequency drift and output deviation of the vibrator 9 based on real-time displacement data collected by the displacement sensor receiver 14. The human-machine interface unit includes a handheld switch 16, which is electrically connected to the signal controller assembly 15 and is used for the subject to input subjective feedback signals when sensing vibration.

[0027] A measurement method for a synchronously sensing vibration threshold precision measuring instrument includes the following steps: Step S1, Contact Force Pre-detection: Place the part to be tested on the surrounding platform 2. The pressure sensor 7 collects the contact pressure between the part to be tested and the platform in real time and transmits it to the signal controller assembly 15. The visual feedback component outputs the corresponding visual feedback signal according to whether the contact pressure is within the standard range of 0.7N~2.1N.

[0028] Step S2, Test Start Judgment: The signal controller assembly 15 determines that the test start condition is met and automatically starts the vibration test process only when the contact pressure is stable within the standard range and reaches the preset time. If the contact pressure exceeds the standard range, the system will not start or will pause the test.

[0029] Step S3, Vibration Stimulation and Synchronous Acquisition: After the start-up conditions are met, the signal controller assembly 15 drives the vibrator 9 to output vibration stimulation with progressively varying frequencies from 4Hz to 125Hz according to the preset program. At the same time, the displacement sensor probe 5 and the displacement sensor receiver 14 synchronously acquire the real vibration displacement data of the integrated ceramic probe 1. The contact pressure data and the subjective feedback signals input by the subject through the human-computer interaction unit are recorded synchronously throughout the process, and a unified time stamp is added to all data.

[0030] Step S4, invalid data screening: After the test is completed, the signal controller assembly 15 automatically screens out the vibration displacement data and subjective feedback data collected during the period when the contact pressure exceeds the standard range according to the time stamp, and retains the valid data under the standard pressure throughout the test.

[0031] Step S5, Threshold Calculation: Based on the effective vibration displacement data and the corresponding subjective feedback signal, the vibration perception threshold of the subject in the corresponding frequency band is calculated through coupling analysis using a preset algorithm.

[0032] Therefore, the present invention adopts the above-mentioned synchronous sensing vibration threshold precision measuring instrument and measurement method, which solves the defects of traditional open-loop equipment such as large measurement error, low data reliability, poor low-frequency measurement sensitivity and complex calibration, and greatly improves the accuracy, repeatability and traceability of vibration threshold measurement.

[0033] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A precision measuring instrument for synchronously sensing vibration threshold, characterized in that, The device includes an integrated probe assembly, a contact force monitoring module, a signal controller assembly, and a human-machine interface unit. The integrated probe assembly includes an internal housing, a vibrator, an integrated ceramic probe, a displacement sensor probe, and a displacement sensor receiver. The vibrator and the displacement sensor receiver are rigidly fixed to the same base bracket of the internal housing. The integrated ceramic probe is coaxially mounted at the central axis of the vibrator. The displacement sensor probe and the displacement sensor receiver are electrically connected. The contact force monitoring module includes a surrounding platform, a pressure sensor, and a visual feedback component. The surrounding platform is coaxially arranged around the outer periphery of the integrated ceramic probe. The pressure sensor is drivenly connected to the surrounding platform. The visual feedback component is electrically connected to the signal controller assembly. The signal controller assembly is electrically connected to the vibrator, the displacement sensor receiver, the pressure sensor, and the human-machine interface unit, respectively.

2. The precision measuring instrument for synchronous sensing vibration threshold according to claim 1, characterized in that, The radial distance between the center of the displacement sensor probe and the center edge of the integrated ceramic probe is 0.5 mm.

3. The precision measuring instrument for synchronous sensing vibration threshold according to claim 1, characterized in that, The distance between the detection center axis of the pressure sensor and the upper plane of the surrounding platform is 14.3 mm, and the detection range of the pressure sensor covers the standard contact pressure range of 0.7 N to 2.1 N.

4. The precision measuring instrument for synchronous sensing vibration threshold according to claim 1, characterized in that, The visual feedback component includes an acrylic light-transmitting panel and an LED feedback light. The acrylic light-transmitting panel is coaxially mounted with the device housing, the LED feedback light is coaxially positioned with the acrylic light-transmitting panel, and the LED feedback light is electrically connected to the signal controller assembly.

5. The precision measuring instrument for synchronous sensing vibration threshold according to claim 1, characterized in that, The signal controller assembly has a built-in data filtering module.

6. The precision measuring instrument for synchronous sensing vibration threshold according to claim 1, characterized in that, The signal controller assembly has a built-in exciter drive control module.

7. The precision measuring instrument for synchronous sensing vibration threshold according to claim 1, characterized in that, The human-machine interface unit includes a hand switch, which is electrically connected to the signal controller assembly.

8. The operating method of a synchronous sensing vibration threshold precision measuring instrument as described in any one of claims 1-7, characterized in that, Includes the following steps: Step S1, Contact Force Pre-detection: Place the part to be tested on the surrounding platform. The pressure sensor collects the contact pressure between the part to be tested and the platform in real time and transmits it to the signal controller assembly. The visual feedback component outputs the corresponding visual feedback signal according to whether the contact pressure is within the standard range of 0.7N~2.1N. Step S2, Test Start Judgment: The signal controller assembly determines that the test start condition is met and automatically starts the vibration test process only when the contact pressure is stable within the standard range and reaches the preset time; if the contact pressure exceeds the standard range, the system will not start or will pause the test. Step S3, Vibration Stimulation and Synchronous Acquisition: After the start-up conditions are met, the signal controller assembly drives the exciter to output vibration stimulation with a gradually changing frequency from 4Hz to 125Hz according to the preset program. At the same time, the displacement sensor probe and the displacement sensor receiver synchronously acquire the real vibration displacement data of the integrated ceramic probe. The contact pressure data and the subjective feedback signal input by the subject through the human-computer interaction unit are recorded synchronously throughout the process, and a unified time mark is added to all data. Step S4, invalid data screening: After the test is completed, the signal controller assembly automatically screens out the vibration displacement data and subjective feedback data collected during the period when the contact pressure exceeds the standard range according to the time stamp, and retains the valid data under the standard pressure throughout the process; Step S5, Threshold Calculation: Based on the effective vibration displacement data and the corresponding subjective feedback signal, the vibration perception threshold of the subject in the corresponding frequency band is calculated through coupling analysis using a preset algorithm.

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