CN110243561B - Spring tester, spring detection method thereof, control device and storage medium - Google Patents
Spring tester, spring detection method thereof, control device and storage medium Download PDFInfo
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- CN110243561B CN110243561B CN201910678739.0A CN201910678739A CN110243561B CN 110243561 B CN110243561 B CN 110243561B CN 201910678739 A CN201910678739 A CN 201910678739A CN 110243561 B CN110243561 B CN 110243561B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
- G01M5/005—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems
Abstract
The invention discloses a spring detection method, which is applied to a spring tester and comprises the following steps: when a spring to be detected is fixed at each station, pressure information detected by the pressure detection module is acquired; determining the position information of each spring to be detected according to the pressure information; judging whether each piece of position information is matched with the corresponding preset positioning information; and if the pressure values are matched with the pressure values, controlling the pressing device to press down according to preset test parameters so that each test fixture compresses the corresponding spring to be tested, and detecting the force value generated by the pressed spring to be tested. The invention also discloses a control device, a spring testing machine and a readable storage medium. The invention aims to reduce the measurement error of the spring test and improve the reliability of the spring test result.
Description
Technical Field
The invention relates to the technical field of spring detection, in particular to a spring detection method, a control device, a spring testing machine and a readable storage medium.
Background
Currently, to ensure the service life of springs in products (such as mattresses), fatigue tests are generally performed on different springs to select springs meeting the requirements of the products.
However, in the process of testing a batch of springs with different specifications, the springs are generally fixed on the working positions of the workbench in a manual mode to directly start detection, and due to the fact that the randomness of manual operation is large, the positions of the springs relative to the test fixture are not uniform, the situation that the force application effect of the test fixture on the spring testing machine on each spring is consistent cannot be guaranteed, the measurement error is large easily, and the reliability of the spring test result is affected.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a spring detection method, aiming at reducing the measurement error of spring test and improving the reliability of the spring test result.
In order to achieve the above object, the present invention provides a spring detection method applied to a spring tester, wherein the spring tester comprises a workbench and a pressing device installed above the workbench, the workbench is provided with a plurality of stations, each station is provided with a fastener for fixing a spring, the surface of the workbench is provided with a pressure detection module at each station, the pressing device is provided with a plurality of test jigs, the test jigs and the stations are arranged in a one-to-one correspondence manner, and the spring detection method comprises the following steps:
when a spring to be detected is fixed at each station, pressure information detected by the pressure detection module is acquired;
determining the position information of each spring to be detected according to the pressure information;
judging whether each piece of position information is matched with the corresponding preset positioning information;
and if the pressure values are matched with the pressure values, controlling the pressing device to press down according to preset test parameters so that each test fixture compresses the corresponding spring to be tested, and detecting the force value generated by the pressed spring to be tested.
Optionally, the pressure detection module is a pressure detection flat plate covering the surface of the workbench, each spring to be detected is fixed on the pressure detection flat plate, and the step of determining the position information of each spring to be detected according to the pressure information includes:
generating a pressure distribution information graph of the surface of the workbench according to the pressure information;
and analyzing the pressure distribution information graph to determine the position information of each spring to be detected.
Optionally, the step of analyzing the pressure distribution information map and determining the position information of each spring to be measured includes:
identifying the outline of each spring to be detected in the pressure distribution information graph;
determining the position characteristic points of the springs to be tested according to the profiles;
and determining the position information of each spring to be measured according to the position parameters of each position characteristic point in the pressure distribution information diagram.
Optionally, the step of determining the position feature point of each spring to be measured according to each profile includes:
and identifying the central point of each contour as the position characteristic point.
Optionally, in the pressure distribution information map, the step of identifying the profile of each spring to be measured includes:
analyzing image points of which the pressure values are greater than or equal to a preset threshold value in the pressure distribution information map;
and carrying out circumference identification on the image points, and determining the outline of each spring to be detected.
Optionally, when a spring to be detected is fixed to each of the stations, before the step of obtaining the pressure information detected by the pressure detection module, the method further includes:
and controlling the pressing device to press down for a preset stroke so as to enable each test fixture to compress the corresponding spring to be tested.
Optionally, after the step of determining whether each of the position information matches with the corresponding preset positioning information, the method further includes:
if not, determining the spring to be tested of which the position information is not matched with the corresponding preset positioning information as an abnormal spring;
determining the position deviation information of the abnormal spring according to the position information of the abnormal spring and the corresponding preset positioning information;
acquiring station identification information of a station where the abnormal spring is located;
generating prompt information according to the position deviation information and the station identification information;
and outputting the prompt information.
Further, in order to achieve the above object, the present application also proposes a control device including: a memory, a processor and a spring detection program stored on the memory and executable on the processor, the spring detection program when executed by the processor implementing the steps of the spring detection method as set forth in any one of the above.
In addition, in order to achieve the above object, the present application also proposes a spring testing machine including:
the spring fixing device comprises a workbench, a spring fixing device and a pressure detection module, wherein the workbench is provided with a plurality of stations, each station is provided with a fastener for fixing a spring, and the surface of the workbench is provided with the pressure detection module at each station;
the pressing device is arranged above the workbench and provided with a plurality of test jigs, and the test jigs and the stations are arranged in one-to-one correspondence;
the control device as described above, the pressure detection module and the pressing device are both connected to the control device.
In addition, in order to achieve the above object, the present application also proposes a readable storage medium having a spring detection program stored thereon, which when executed by a processor implements the steps of the spring detection method as described in any one of the above.
The invention provides a spring testing method, which is applied to a spring testing machine, determines the position information of each spring to be tested on a workbench according to the pressure information detected by a pressure detection module on the workbench, can identify whether the position of each spring to be tested is accurate or not according to the matching of the determined position information and the corresponding preset positioning information, when the position of the spring to be tested is accurate, the pressing device is controlled to press down according to preset test parameters so that each test fixture compresses the corresponding spring to be tested and detects the force value generated by the pressed spring to be tested, the spring testing machine can ensure that the positions of the springs to be tested are uniform relative to the positions of the testing jigs, ensures that the force application effect of the testing jigs on the spring testing machine on each spring to be tested is consistent, reduces the measurement error of the spring test, and improves the reliability of the spring test result.
Drawings
FIG. 1 is a schematic diagram of a hardware configuration of an embodiment of a control apparatus according to the present invention;
FIG. 2 is a schematic flow chart of a first embodiment of a spring testing method according to the present invention;
FIG. 3 is a detailed flowchart of step S20 in FIG. 2;
FIG. 4 is a graph of pressure distribution information related to a spring test method in an embodiment of the invention;
FIG. 5 is a detailed flowchart of step S22 in FIG. 3;
FIG. 6 is a detailed flowchart of step S221 in FIG. 5;
FIG. 7 is a flowchart illustrating a spring testing method according to a second embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The main solution of the embodiment of the invention is as follows: a spring testing method applied to a spring testing machine is provided, and the method comprises the following steps: when a spring to be detected is fixed at each station, pressure information detected by the pressure detection module is acquired; determining the position information of each spring to be detected according to the pressure information; judging whether each piece of position information is matched with the corresponding preset positioning information; and if the pressure values are matched with the pressure values, controlling the pressing device to press down according to preset test parameters so that each test fixture compresses the corresponding spring to be tested, and detecting the force value generated by the pressed spring to be tested.
Because among the prior art, the position that the spring was placed is not detected during the spring test, when testing in batches the spring, because manual operation's randomness is great, every spring is not unified for the position of test fixture, can't guarantee that the test fixture on the spring test machine is unanimous to the application of force effect of every spring, leads to measuring error great easily, influences the reliability of spring test result.
The invention provides the solution, and aims to reduce the measurement error of the spring test and improve the reliability of the spring test result.
The embodiment of the invention provides a spring testing machine which is used for testing the fatigue performance of a spiral spring.
The spring testing machine specifically comprises a workbench and a pressing device arranged above the workbench, the workbench is provided with a plurality of stations, each station is provided with a fastener for fixing a spring, each station is provided with a pressure detection module on the surface of the workbench, the pressing device is provided with a plurality of testing jigs, and the testing jigs and the stations are arranged in a one-to-one correspondence manner.
The pressing device can move towards or away from the spring to be tested along the vertical direction under the control of the control device, and the test fixture moves along with the movement of the pressing device. The pressure sensor is arranged in the test fixture, and when the test fixture is driven by the pressing device to compress the spring to be tested on the corresponding station, the pressure sensor on the test fixture can detect the force value generated by the compression of the spring. A
The fastener is specifically used for pressing the bottom of the spiral spring to the workbench during detection.
The pressure detection module can be specifically a plurality of pressure sensors arranged at intervals in each station or a detection flat plate covering all stations on the surface of the workbench, and can be arranged according to actual requirements.
The embodiment of the invention also provides a control device which can be applied to control the spring testing machine. The control device can be arranged in the spring testing machine or independently arranged outside the spring testing machine.
In an embodiment of the present invention, referring to fig. 1, the control device includes: a processor 1001, such as a CPU, memory 1002, or the like. The processor 1001 is connected to the memory 1002. The memory 1002 may be a high-speed RAM memory or a non-volatile memory (e.g., a disk memory). The memory 1002 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the configuration of the device shown in fig. 1 is not intended to be limiting of the device and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, a spring detection program may be included in the memory 1002, which is a readable storage medium. In the apparatus shown in fig. 1, the processor 1001 may be configured to call up a spring detection program stored in the memory 1002 and perform operations of the steps related to the spring detection method in the following embodiments.
The invention also provides a spring detection method.
Referring to fig. 2, a first embodiment of a spring inspection method of the present invention is proposed, which includes:
step S10, when a spring to be detected is fixed at each station, pressure information detected by the pressure detection module is obtained;
specifically, whether the spring to be detected is fixed at each station or not can be judged through infrared induction or according to an instruction input by a user.
When each station is fixed with a spring to be detected, before the step of acquiring the pressure information detected by the pressure detection module, the method further comprises the following steps: and controlling the pressing device to press down for a preset stroke so as to enable each test fixture to compress the corresponding spring to be tested. The preset stroke can be set according to actual requirements. By adopting the mode, the spring to be detected can generate a sufficiently large pressure value in the pressure detection module, and the position information of the spring to be detected can be accurately determined subsequently.
Step S20, determining the position information of each spring to be tested according to the pressure information;
the position of each spring to be tested relative to the workbench can be obtained through analysis according to the pressure information, and the position information of each spring to be tested can be determined. The position information is specifically coordinate parameters of each spring to be detected in a preset coordinate system established in the spring detection machine.
Specifically, the pressure detection module is a pressure detection flat plate covering the surface of the workbench, and each of the springs to be detected is fixed to the pressure detection flat plate, referring to fig. 3, step S20 may specifically include:
step S21, generating a pressure distribution information chart of the surface of the workbench according to the pressure information;
the pressure detection module is a pressure detection flat plate, so that the pressure condition of any position on the surface can be detected. The local pressure value of the fixed spring to be tested is larger, and the local pressure value of the spring not to be tested is 0. Therefore, the pressure distribution information graph of the working table can be generated according to the pressure information detected by the pressure detection flat plate. The pressure distribution information graph represents the pressure condition of any position on the surface of the workbench. In the pressure distribution information diagram, as shown in fig. 4, different identifiers may be used to represent different pressure values, for example, a position where the pressure value is smaller than the preset threshold is represented by a blank, and a position where the pressure value is greater than or equal to the preset threshold is represented by a shaded area.
And step S22, analyzing the pressure distribution information chart and determining the position information of each spring to be measured.
By analyzing the pressure distribution information graph, the pressure information points generated by the springs to be tested correspondingly can be determined, the positions of the pressure information points in the pressure distribution information graph are determined, and the position information of the springs to be tested in each station in the workbench can be determined.
In addition, when the pressure detection module is a pressure sensor arranged in each station at intervals, the pressure sensor with the detected pressure value larger than the preset value can be determined as a target sensor according to the pressure information, the coordinate parameter of the target sensor in the preset coordinate system is obtained, and the position information of the spring to be detected in each station is determined according to the obtained coordinate parameter.
Step S30, judging whether each position information is matched with the corresponding preset positioning information;
if so, go to step S40, and if not, go to step S50.
Specifically, different stations respectively have corresponding preset positioning information. The preset positioning information can be determined according to the positions of the test fixtures above the stations so as to ensure that each spring to be tested placed under the same test fixture is positioned at the same position, and the relative positions of different test fixtures and the corresponding springs to be tested can be unified. Specifically, the midpoint of the projection of each test fixture on the workbench in the preset coordinate system may be used as the parameter as the preset positioning information. The preset positioning information corresponding to each position information can be obtained according to the station where each spring to be detected is located. In other embodiments, the preset positioning information may also be a preset parameter range determined according to the position of the detection fixture.
And judging whether the position information is consistent with the corresponding preset positioning information, if so, judging that the position information of the spring to be detected is matched with the preset positioning information, and if not, judging that the position information of the spring to be detected is not matched with the preset positioning information.
When the position information of each spring to be tested is matched with the corresponding preset positioning information, it is indicated that the current position of the spring to be tested is accurate, and therefore step S40 can be executed to detect the fatigue performance and the like of the spring to be tested. When the position information of any one of the springs to be tested does not match the corresponding preset positioning information, step S50 or step S50a may be performed.
And step S40, controlling the pressing device to press down according to preset test parameters so that each test fixture compresses the corresponding spring to be tested, and detecting the force value generated by the pressed spring to be tested.
The preset test parameters specifically include test parameters required by fatigue test of the spring to be tested, such as pressing stroke, pressing frequency, pressing times and the like, and can be determined by acquiring the setting parameters input by a tester.
When each test fixture compresses the corresponding spring to be tested, the detection data of the pressure sensor in the test fixture is the force value generated by the compression of each spring to be tested.
In step S50, a prompt message is issued.
And sending prompt information in a text mode, an acousto-optic mode and the like to remind a tester that the current position of the spring to be tested is inaccurate, so as to remind the tester to adjust the current position of the spring to be tested.
The spring testing method provided by the embodiment of the invention is applied to a spring testing machine, the position information of each spring to be tested on a workbench is determined according to the pressure information detected by a pressure detection module on the workbench, whether the position of each spring to be tested is accurate or not can be identified according to the matching between the determined position information and the corresponding preset positioning information, and when the position of the spring to be tested is accurate, a pressing device is controlled to press down according to preset testing parameters so that each testing jig compresses the corresponding spring to be tested, the force value generated by the pressure of each spring to be tested is detected, through the mode, the positions of the springs to be tested can be ensured to be uniform relative to the positions of the testing jigs, the force application effect of the testing jigs on the spring testing machine to each spring to be tested is ensured to be consistent, and the measurement error of the spring testing is reduced, and the reliability of the spring test result is improved.
Specifically, in the first embodiment, referring to fig. 5, step S22 may specifically include:
step S221, identifying the outline of each spring to be measured in the pressure distribution information diagram;
and identifying all pressure information points corresponding to the springs to be tested in the pressure distribution information graph, and identifying and obtaining the outline of each spring to be tested according to the pressure information points.
Step S222, determining position characteristic points of the springs to be detected according to the contours;
specifically, a center point of each of the contours is identified as the position feature point. For example, if the contour is generally circular, the center of the circle serves as a position feature point.
In addition, a plurality of points can be selected on the contour according to a preset rule to serve as position characteristic points of the springs to be measured.
Step S223, determining the position information of each spring to be measured according to the position parameter of each position feature point in the pressure distribution information diagram.
And determining image coordinates of each position characteristic point in the pressure distribution information graph as the position parameters, and converting the position parameters into corresponding coordinate parameters in a preset coordinate system according to the conversion relation between the image coordinate system and the preset coordinate system of the spring detection machine to serve as the position information of each spring to be detected.
In this embodiment, the position of the spring to be measured is comprehensively and accurately analyzed by identifying the profile of the spring to be measured, which is correspondingly formed in the pressure distribution information diagram, determining the position characteristic points of the spring to be measured through the profile, and determining the position information of the spring to be measured according to the determined position characteristic points.
Specifically, referring to fig. 6, step S221 may specifically include:
step S201, analyzing image points of which the pressure values are greater than or equal to a preset threshold value in the pressure distribution information map;
the preset threshold value can be set according to actual conditions, and the pressure value detected by the position where the spring to be detected is placed is larger than that detected by the position where the spring to be detected is not placed, so that the image point with the pressure value larger than or equal to the preset threshold value can be considered to be generated due to the contact of the spring to be detected and the pressure detection flat plate.
Step S202, carrying out circumference identification on the image points, and determining the outline of each spring to be detected.
Since the coil spring is placed on the table surface, the contact surface is generally circular. Therefore, the contour of each spring to be measured can be identified by carrying out circumference identification on the image points.
In this embodiment, in the above manner, the image point with a sufficiently large generated pressure value is used to identify the profile of the spring to be measured, so as to ensure the accuracy of the identified profile of the spring, and further ensure that the position information of each spring to be measured can be accurately obtained.
Further, based on the first embodiment, a second embodiment of the spring detection method is provided. In a second embodiment, referring to FIG. 7, step S50a may include
Step S51, determining a spring to be tested, the position information of which is not matched with the corresponding preset positioning information, as an abnormal spring;
step S52, determining the position deviation information of the abnormal spring according to the position information of the abnormal spring and the corresponding preset positioning information;
the position correction information may specifically include the deviation direction, deviation magnitude, and the like of the abnormal spring.
Step S53, station identification information of the station where the abnormal spring is located is obtained;
the work mark identification information can be specifically the serial number of the work station and the like.
Step S54, generating prompt information according to the position deviation information and the station identification information;
and step S55, outputting the prompt message.
By the method, a detector can intuitively and accurately know which station the spring is deviated from and the deviation condition, so that the position of the spring to be detected can be adjusted in a targeted and accurate manner, the efficiency of adjusting the position of the spring is improved, and the spring testing efficiency is further improved.
In addition, an embodiment of the present invention further provides a readable storage medium, where a spring detection program is stored on the readable storage medium, and when the spring detection program is executed by a processor, the spring detection program implements the relevant steps of any embodiment of the above spring detection method.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above, and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, a spring tester, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. A spring detection method is characterized by being applied to a spring testing machine, wherein the spring testing machine comprises a workbench and a pressing device arranged above the workbench, the workbench is provided with a plurality of stations, each station is provided with a fastener for fixing a spring, a pressure detection module is arranged on each station on the surface of the workbench, the pressing device is provided with a plurality of test jigs, the test jigs and the stations are arranged in a one-to-one correspondence manner, and the spring detection method comprises the following steps:
when a spring to be detected is fixed at each station, pressure information detected by the pressure detection module is acquired;
determining the position information of each spring to be detected according to the pressure information;
judging whether each piece of position information is matched with the corresponding preset positioning information;
if the springs are matched, controlling the pressing device to press down according to preset test parameters so that each test fixture compresses the corresponding spring to be tested, and detecting the force value generated by the pressed spring to be tested;
the pressure detection module is a pressure detection flat plate covering the surface of the workbench, the springs to be detected are fixed on the pressure detection flat plate, and the step of determining the position information of the springs to be detected according to the pressure information comprises the following steps:
generating a pressure distribution information graph of the surface of the workbench according to the pressure information;
identifying the outline of each spring to be detected in the pressure distribution information graph;
determining the position characteristic points of the springs to be tested according to the profiles;
determining the position information of each spring to be measured according to the position parameters of each position characteristic point in the pressure distribution information diagram;
the step of determining the position information of each spring to be measured according to the position parameters of each position characteristic point in the pressure distribution information diagram comprises the following steps:
determining the image coordinates of each position characteristic point in the pressure distribution information map;
and converting the image coordinate into a corresponding coordinate parameter in a preset coordinate system according to a conversion relation between the image coordinate system and the preset coordinate system of the spring testing machine, wherein the coordinate parameter is used as the position information of each spring to be tested.
2. The spring inspection method according to claim 1, wherein the step of determining the position characteristic point of each spring to be inspected based on each profile includes:
and identifying the central point of each contour as the position characteristic point.
3. The spring rate detection method according to claim 1, wherein the step of identifying the profile of each of the springs to be tested in the pressure distribution information map comprises:
analyzing image points of which the pressure values are greater than or equal to a preset threshold value in the pressure distribution information map;
and carrying out circumference identification on the image points, and determining the outline of each spring to be detected.
4. The spring testing method of claim 1, wherein when a spring to be tested is fixed at each of the stations, the step of obtaining the pressure information detected by the pressure testing module further comprises:
and controlling the pressing device to press down for a preset stroke so as to enable each test fixture to compress the corresponding spring to be tested.
5. The spring detection method according to any one of claims 1 to 4, wherein after the step of determining whether each of the position information matches its corresponding preset positioning information, the method further comprises:
if not, determining the spring to be tested of which the position information is not matched with the corresponding preset positioning information as an abnormal spring;
determining the position deviation information of the abnormal spring according to the position information of the abnormal spring and the corresponding preset positioning information;
acquiring station identification information of a station where the abnormal spring is located;
generating prompt information according to the position deviation information and the station identification information;
and outputting the prompt information.
6. A control device, characterized in that the control device comprises: memory, a processor and a spring detection program stored on the memory and executable on the processor, the spring detection program when executed by the processor implementing the steps of the spring detection method according to any one of claims 1 to 5.
7. A spring testing machine, comprising:
the spring fixing device comprises a workbench, a spring fixing device and a pressure detection module, wherein the workbench is provided with a plurality of stations, each station is provided with a fastener for fixing a spring, and the surface of the workbench is provided with the pressure detection module at each station;
the pressing device is arranged above the workbench and provided with a plurality of test jigs, and the test jigs and the stations are arranged in one-to-one correspondence;
the control device of claim 6, wherein the pressure detection module and the hold-down device are both coupled to the control device.
8. A readable storage medium, characterized in that the readable storage medium has stored thereon a spring detection program, which when executed by a processor implements the steps of the spring detection method according to any one of claims 1 to 5.
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| CN110794213B (en) * | 2019-11-07 | 2022-03-04 | 建新赵氏科技有限公司 | Detection method of anti-pinch strip resistance value test equipment |
| CN114636534A (en) * | 2022-02-09 | 2022-06-17 | 广州兴森快捷电路科技有限公司 | Oven fixture spring detection device and method, storage medium and oven equipment |
| CN117740281B (en) * | 2024-02-19 | 2024-04-26 | 苏州市产品质量监督检验院(苏州市质量技术监督综合检验检测中心、苏州市质量认证中心) | Mattress spring compression test system |
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