CN-121977427-A - Non-contact type steel plate thickness testing device and method

CN121977427ACN 121977427 ACN121977427 ACN 121977427ACN-121977427-A

Abstract

The invention discloses a non-contact type steel plate thickness testing device and method, wherein the device comprises a movable carrier, a measuring probe arranged on the movable carrier, the measuring probe comprises a magnetic force generating unit, a distance detecting unit, a distance adjusting unit, a magnetic force detecting unit and a control unit, the reference magnetic force value is measured under the condition that the distance between the magnetic force generating unit and a standard thickness steel plate is the preset constant value and the constant magnetic force is generated, and a judging signal representing whether the steel plate thickness reaches the standard is output according to a comparison result. From this, through measuring the attractive force size between magnet and the steel sheet under the prerequisite of the distance between fixed magnet and the steel sheet of dynamic adjustment and judging whether steel sheet thickness is up to standard, can become non-contact detection with contact measurement, and then can realize continuous zero clearance measurement to simplified detection flow and step, can detect whether steel sheet thickness is up to standard fast.

Inventors

CHEN YONGXIAN
LUO DAN
RONG YANG
Liang Zhikui
CHAO SHENGQI
HONG HAO
Liao zhonghao
WU XIN
YANG XIAOBO

Assignees

成都市特种设备检验检测研究院(成都市特种设备应急处置中心)

Dates

Publication Date: 20260505
Application Date: 20260326

Claims (9)

1. A non-contact steel plate thickness testing device, comprising: moving the carrier; A measurement probe mounted on the moving carrier, the measurement probe comprising: A magnetic force generating unit for generating a constant magnetic force acting on the measured steel plate; The distance detection unit is used for detecting the actual distance between the magnetic force generation unit and the surface of the detected steel plate in real time; The distance adjusting unit is connected to the magnetic force generating unit and is used for adjusting the distance between the magnetic force generating unit and the surface of the detected steel plate in real time according to the feedback of the distance detecting unit so as to keep the distance to be a preset constant value; The magnetic force detection unit is connected with the magnetic force generation unit and is used for detecting the magnetic attraction force between the magnetic force generation unit and the detected steel plate in real time and outputting a corresponding magnetic force signal; And a control unit connected to the magnetic force generation unit, the distance detection unit, the distance adjustment unit, and the magnetic force detection unit, respectively, the control unit being configured to: Controlling the magnetic force generating unit to generate the constant magnetic force; Receiving signals of the distance detection unit and driving the distance adjustment unit to perform the real-time adjustment; receiving a real-time magnetic force signal output by the magnetic force detection unit; And comparing the real-time magnetic force signal with a pre-stored reference magnetic force value, and outputting a judging signal representing whether the thickness of the steel plate reaches the standard or not according to a comparison result.
2. The non-contact type steel plate thickness measuring apparatus according to claim 1, wherein the magnetic force generating unit comprises an electromagnetic coil and a permanent magnet, the control unit generates the constant magnetic force by applying a fixed current to the electromagnetic coil, and the electromagnetic coil is provided in combination with the permanent magnet for adjusting the constant magnetic force.
3. The non-contact steel plate thickness testing device according to claim 1, wherein the distance detecting unit is a laser displacement sensor or a laser range finder, the distance adjusting unit is an electric hydraulic rod or a linear guide mechanism, and the magnetic force detecting unit is a tension sensor or a pressure sensor.
4. The non-contact type steel plate thickness testing apparatus according to claim 1, wherein the control unit continuously collects real-time magnetic force signals outputted from the magnetic force detection unit and compares the real-time magnetic force signals with the reference magnetic force values in real time during the movement of the moving carrier.
5. The non-contact type steel sheet thickness testing apparatus according to claim 1, wherein the manner in which the control unit outputs the judgment signal includes: If the real-time magnetic force signal is smaller than the reference magnetic force value, outputting a disqualification alarm signal, otherwise, outputting a qualification signal or not outputting a signal.
6. The non-contact type steel plate thickness measuring apparatus according to claim 1, wherein the magnetic force generating unit comprises a micro magnetic core having a diameter of 5mm to 10mm, on which an electromagnetic coil is wound, to form a small-sized measuring probe.
7. A non-contact steel plate thickness testing method, characterized in that it is realized based on the non-contact steel plate thickness testing device according to any one of claims 1-6, comprising the following steps: The calibration step, the mobile carrier is placed on a standard thickness steel plate, the distance adjusting unit is driven by the control unit to adjust the position of the magnetic force generating unit until the detection value of the distance detecting unit reaches a preset target value, and the position at the moment is recorded as the preset constant value; The detection step is that the mobile carrier is placed on a detected steel plate and moves, in the moving process, the control unit controls the magnetic force generation unit to keep the constant magnetic force, and drives the distance adjustment unit according to the real-time feedback of the distance detection unit, so that the distance between the magnetic force generation unit and the surface of the detected steel plate is always kept at the preset constant value; And judging, namely comparing the real-time magnetic force signal with the reference magnetic force value, judging that the thickness of the steel plate at the current measuring point does not reach the standard if the real-time magnetic force signal is smaller than the reference magnetic force value, and outputting a corresponding judging signal.
8. The method according to claim 7, wherein in the calibration step, the predetermined target value is a fixed distance value, which is set manually or automatically by the control unit.
9. The method according to claim 7, wherein in the judging step, the control unit compares the continuously collected real-time magnetic force signals in real time during the movement of the moving carrier, and sends out an audible and visual alarm signal or marks a defective position on a display interface when the thickness of the steel sheet is judged to be not up to standard.

Description

Non-contact type steel plate thickness testing device and method Technical Field The invention relates to the technical field of special detection equipment detection, in particular to a non-contact steel plate thickness testing device and method. Background In the special equipment inspection industry, large-scale recreation facilities of the bump type are more common special equipment, wherein the thickness of a lower polar plate of a bump car is definitely required. According to the rule of safety technology of large-scale recreation facilities (TSG 71-2023) in the 8.6.3 (6), the thickness of the steel plate of the lower polar plate of the bumper car should be not less than 4mm. Usually, because the area of the bottom plate of the bumper car field is large, and a thickness gauge is usually used for single-point detection, if each point of the bottom plate is measured, a lot of time is required (adsorption, measurement and recording of the thickness gauge point by point, and replacement of the next point). Therefore, in the actual detection work, the thickness of a plurality of points is subjected to sampling inspection and averaging to be used as a local thickness value of the lower polar plate, and whether the standard is reached or not is judged according to the plurality of local thickness values. Although the detection efficiency is improved by the snapshot measurement averaging method, the detection omission problem is also brought. Disclosure of Invention The invention aims to overcome the defects of the prior art, and provides a non-contact steel plate thickness testing device and method, which can rapidly realize the detection of whether the thickness of a steel plate in front of a bumper car is qualified. The aim of the invention is realized by the following technical scheme: In a first aspect, the application discloses a non-contact steel plate thickness testing device, comprising a movable carrier; the measuring probe comprises a magnetic force generating unit, a distance detecting unit, a distance adjusting unit, a real-time magnetic force signal receiving unit, a magnetic force detecting unit and a control unit, wherein the magnetic force generating unit is used for generating constant magnetic force acting on a measured steel plate, the distance detecting unit is used for detecting the actual distance between the magnetic force generating unit and the surface of the measured steel plate in real time, the distance adjusting unit is connected to the magnetic force generating unit and used for adjusting the distance between the magnetic force generating unit and the surface of the measured steel plate in real time according to feedback of the distance detecting unit, the magnetic force detecting unit is connected with the magnetic force generating unit and used for detecting the magnetic attraction between the magnetic force generating unit and the measured steel plate in real time and outputting corresponding magnetic force signals, the control unit is respectively connected with the magnetic force generating unit, the distance detecting unit, the distance adjusting unit and the magnetic force detecting unit and used for controlling the magnetic force generating unit to generate the constant magnetic force, receiving signals of the distance detecting unit and driving the distance adjusting unit to conduct the real-time adjustment, receiving the real-time magnetic force signals output by the magnetic force detecting unit, comparing the real-time magnetic force signals with pre-stored magnetic force values and the measured magnetic force values and the standard values are compared to determine whether the measured magnetic force values reach the constant magnetic force values and the constant magnetic force values. The method has the advantages that whether the thickness of the steel plate meets the standard is judged by measuring the attractive force between the magnet and the steel plate on the premise of dynamically adjusting the distance between the fixed magnet and the steel plate, the contact type measurement can be changed into the non-contact type detection, and further continuous gapless measurement can be realized, so that the detection flow and steps are simplified, and whether the thickness of the steel plate meets the standard can be rapidly detected. Further, the magnetic force generating unit comprises an electromagnetic coil and a permanent magnet, the control unit is used for generating the constant magnetic force by applying fixed current to the electromagnetic coil, and the electromagnetic coil and the permanent magnet are combined and arranged for enhancing the constant magnetic force. Further, the distance detection unit is a laser displacement sensor or a laser distance meter, the distance adjustment unit is an electric hydraulic rod or a linear guide rail mechanism, and the magnetic force detection unit is a tension sensor or a pressure sensor. Further, the control unit c