CN206362625U

CN206362625U - Portable test system of entrying

Info

Publication number: CN206362625U
Application number: CN201621296110.8U
Authority: CN
Inventors: 谢孝盼; 彭光健; 张泰华; 蒋伟峰; 马毅; 陈恒
Original assignee: Zhejiang University of Technology ZJUT
Current assignee: Zhejiang University of Technology ZJUT
Priority date: 2016-11-30
Filing date: 2016-11-30
Publication date: 2017-07-28
Anticipated expiration: 2026-11-30

Abstract

A portable plunge test system includes a plunge test device and a computer. The plunge test device includes a base and a working platform adjustment module, a plunge test module, an in-situ observation module, a signal measurement and control module and a power module installed on the base; the working platform adjustment module, the plunge test module, the in-situ observation module and the signal measurement and control module are respectively connected to the power module; the working platform adjustment module includes a vertical adjustment component, a horizontal adjustment component and a working platform, and the plunge test module includes a piezoelectric ceramic driver for horizontal drive, an electromagnetic drive device for vertical drive and a pressure head. The utility model provides a portable plunge test system capable of in-situ plunge test and high test accuracy.

Description

One kind is portable to be included in test system

Technical field

The utility model, which is related to, a kind of portable is included in test system.

Background technology

Instrumentation press-in is a kind of mechanics test system of minute yardstick.The quasi-instrument, which can be measured and recorded automatic, in real time, to exist The load and the depth of pressing in sample acted in the indentation test cycle on pressure head, using information such as load-deepness, by inverting Analysis, the penetration hardness and mechanical parameter of identification material.It is the press fit instrument by functions expanding to be included in instrument, in process of press in, Drive ram and sample produce the relative motion of level, while measuring horizontal load, vertical load and being included in depth with being included in The consecutive variations process of position.It is able to can also not only be studied with the fretting wear of research material and structure, deformation and failure performance The bond strength for sticking together failure and film and substrate of coating.In electronic device film, vehicle spray painting, the inspection of optical frames first-class quality It is widely used in terms of survey.

At present, the portable instrument that is included in not yet occurs, existing to be included in test and carry out in the lab, it is necessary to strict control External environment condition interference processed, it is impossible to realize the on-line checking for engineering site or large-sized structural parts.It is most widely used at present It is desk-top be included in instrument testing film material critical adhesive force and coefficient of friction and specimen surface roughness when, it is necessary to will Measured material or structure are processed into pat and are sent to laboratory test again, it is impossible to realize real in-situ test, and it tests knot Fruit can not accurately reflect mechanical property of the material under script external environment.Such means of testing, relatively inefficient, essence Degree is not high.

In summary, it is portable to be included in for the on-line checking in engineering site either large-sized structural parts can be realized The development of tester is very necessary.

The content of the invention

In order to overcome the shortcomings of it is existing be included in instrument presence and can not realize real in-situ test, the utility model provides one It kind in situ can be included in higher a kind of of test, measuring accuracy and portable be included in test system.

The utility model solves the technical scheme that its technical problem used：

One kind is portable to be included in test system, including is included in test device and computer, and the test device that is included in includes Base and workbench adjusting module on base, it is included in test module, in-situ observation module, signal control module And power module；The workbench adjusting module, be included in test module, in-situ observation module, signal control module respectively with The power module connection；

It is provided with the opening for being used for testing tested structural member in the middle part of the base, the left and right sides of the opening respectively symmetrically cloth Column is equipped with, crossbeam, which can slide up and down, to be sleeved on the column；The test module, in-situ observation module of being included in is respectively positioned on The top of the opening；

The workbench adjusting module includes vertical adjustment component, horizontal adjustment component and workbench, described vertical Adjusting component includes vertical adjustment motor and vertical leading screw, and the lower end of the vertical leading screw is fixed on the base, described perpendicular The upper end of raw silk rings thick stick is fixedly connected with column, and the vertical feed screw nut that can be moved up and down is set with the vertical leading screw, described Vertical adjustment motor is arranged on the bottom of crossbeam and its clutch end is connected with vertical feed screw nut, the crossbeam and meanwhile can on The top for being set on the vertical leading screw and being located at the vertical feed screw nut of lower slider；The vertical adjustment component is set There are two, the respectively first vertical adjustment component and second adjust component, the vertical thread of the described first vertical adjustment component vertically Thick stick is located at the left side of column on the left of opening, and the left end of the crossbeam is located at the vertical feed screw nut of the described first vertical adjustment component Top, the vertical adjustment motor of the described first vertical adjustment component is arranged on the bottom of the left end of the crossbeam, described second The vertical leading screw of vertical adjustment component is located at the right side of opening right side uprights, and the right-hand member of the crossbeam is located at described second and adjusted vertically The top of the vertical feed screw nut of whole group part, the vertical adjustment motor of the described second vertical adjustment component is arranged on the crossbeam The bottom of right-hand member；

The horizontal adjustment component includes horizontal adjustment motor, horizontal screw lead and guide rail, and the horizontal screw lead is located at described The top of opening and installed in the crossbeam middle part lower section, the horizontal adjustment motor be arranged on crossbeam on and its power is defeated Go out end to be connected with horizontal screw lead, the top of the guide rail is fixedly mounted on the lower section at the middle part of the crossbeam, the horizontal screw lead On horizontal screw lead nut be arranged on the bottom of the guide rail and horizontally slipped pair with guide rail formation；

The test module that is included in includes the piezoelectric ceramic actuator for horizontal drive, the electromagnetism drive for driving vertically Dynamic device and pressure head, the horizontal screw lead nut is connected by piezoelectric ceramic actuator with the top of the workbench, described The upper end of electromagnetic actuator device is fixedly connected with the bottom of the workbench, and the lower end of the electromagnetic actuator device passes through pressure head Connector is connected with the pressure head；

The in-situ observation module is arranged side by side with electromagnetic actuator device, the in-situ observation module include micro- part and Nosepiece, the micro- part is arranged on the bottom of the workbench by Nosepiece；

The vertical adjustment motor, horizontal adjustment motor, piezoelectric ceramic actuator, electromagnetic actuator device, micro- part point It is not connected by the signal control module with the computer.

Further, the electromagnetic actuator device include shell and be arranged in shell two magnetic cylinders, loading coil and Drive shaft, the loading coil is located between two magnetic cylinders, the upper end of the drive shaft and the lower end of the loading coil It is fixedly connected, the lower end of the drive shaft is connected through shell by pressure head connector with the pressure head, the drive shaft Middle part be connected by flexible support spring with the outer casing inner wall；

It is vertical for the high accuracy for being included in load that measures vertical direction to be sequentially provided with from top to bottom in the drive shaft Load transducer, stroke for measuring the flat capacitance sensor for being included in depth on vertical direction, for measuring horizontal direction Enter the high level of accuracy load transducer of load, current vortex is additionally provided between the right side of the drive shaft and the outer casing inner wall Displacement transducer, the Target Board of the eddy current displacement sensor is located at described respectively with the high level of accuracy load transducer The right side and left side of drive shaft, the probe of the eddy current displacement sensor are arranged on the outer casing inner wall and and current vortex Target Board of displacement transducer or so is just to arrangement.

Further, the upper end of the vertical leading screw is provided with upper limit ring, and the lower end of the vertical leading screw is provided with lower limit Ring.

Further, the bottom corner of the base is respectively equipped between four Magnetic gauge stands, two neighboring Magnetic gauge stand Form V-type neck.

Further, described be included in outside test device is additionally provided with protective cover.

The beneficial effects of the utility model are：Effectively realize that original position is included in test and in-situ observation, realizes follow-on test, carries High testing efficiency and measuring accuracy.

Brief description of the drawings

Fig. 1 is the structural representation for being included in test device with protective cover.

Fig. 2 is the front view for being included in test device.

Fig. 3 is Fig. 2 side view.

Fig. 4 is Fig. 2 axonometric drawing.

Fig. 5 is a kind of portable structural representation for being included in test system.

Fig. 6 is the structural representation of electromagnetic actuator device.

Fig. 7 is the structural representation of horizontal adjustment component.

Embodiment

Further illustrate the utility model below in conjunction with the accompanying drawings and by embodiment.

1~Fig. 7 of reference picture, one kind is portable to be included in test system, including is included in test device and computer, described to be included in Test device include base and workbench adjusting module on base, be included in test module, in-situ observation module, Signal control module 10 and power module 20；The workbench adjusting module, be included in test module, in-situ observation module, letter Number control module is connected with the power module respectively；

It is provided with the opening for being used for testing tested structural member in the middle part of the base, the left and right sides of the opening respectively symmetrically cloth Column 1 is equipped with, crossbeam 4, which can slide up and down, to be sleeved on the column 1；It is described that to be included in test module, in-situ observation module equal Positioned at the top of the opening；

The workbench adjusting module includes vertical adjustment component, horizontal adjustment component and workbench 15, described perpendicular Straight adjustment component includes vertical adjustment motor 6 and vertical leading screw 3, and the lower end of the vertical leading screw 3 is fixed on the base, institute The upper end for stating vertical leading screw 3 is fixedly connected with column 1, and the vertical leading screw spiral shell that can be moved up and down is set with the vertical leading screw 3 Mother, the vertical adjustment motor 6 is arranged on the bottom of crossbeam 4 and its clutch end is connected with vertical feed screw nut, the horizontal stroke Beam 4 can slide up and down simultaneously to be set on the vertical leading screw 3 and positioned at the top of the vertical feed screw nut；It is described vertical Adjustment component is provided with two, and the respectively first vertical adjustment component and second adjust component, the described first vertical adjustment vertically The vertical leading screw of component is located at the left side of column on the left of opening, and the left end of the crossbeam is located at the described first vertical adjustment component The top of vertical feed screw nut, the vertical adjustment motor of the described first vertical adjustment component is arranged on the bottom of the left end of the crossbeam Portion, the vertical leading screw of the described second vertical adjustment component is located at the right side of opening right side uprights, and the right-hand member of the crossbeam is located at institute The top of the vertical feed screw nut of the second vertical adjustment component is stated, the vertical adjustment motor of the described second vertical adjustment component is installed In the bottom of the right-hand member of the crossbeam；

The horizontal adjustment component includes horizontal adjustment motor 19, horizontal screw lead 18 and guide rail 17, the horizontal screw lead 18 Positioned at the top of the opening and installed in the lower section at the middle part of the crossbeam 4, the horizontal adjustment motor 19 is arranged on crossbeam 4 Upper and its clutch end is connected with horizontal screw lead 18, and the top of the guide rail 17 is fixedly mounted on the middle part of the crossbeam 4 Horizontal screw lead nut on lower section, the horizontal screw lead 18 is arranged on the bottom of the guide rail 17 and sliding with the formation of guide rail 17 left and right Dynamic pair；

The test module that is included in includes piezoelectric ceramic actuator 16, the electromagnetism for driving vertically for horizontal drive Drive device 7 and pressure head 11, the top that the horizontal screw lead nut passes through piezoelectric ceramic actuator 16 and the workbench 15 Connection, the upper end of the electromagnetic actuator device 7 is fixedly connected with the bottom of the workbench 15, the electromagnetic actuator device 7 Lower end be connected by pressure head connector 8 with the pressure head 11；

The in-situ observation module is arranged side by side with electromagnetic actuator device 7, and the in-situ observation module includes micro- part 13 and Nosepiece 14, the micro- part is arranged on the bottom of the workbench 15 by Nosepiece；

It is the vertical adjustment motor 6, horizontal adjustment motor 19, piezoelectric ceramic actuator 16, electromagnetic actuator device 7, micro- Part 13 is connected by the signal control module 10 with the computer respectively.

Further, the electromagnetic actuator device 7 includes shell 21 and two magnetic cylinders 22 being arranged in shell 21, loading Coil 23 and drive shaft 24, the loading coil 23 are located between two magnetic cylinders, the upper end of the drive shaft 24 with it is described The lower end of loading coil 23 is fixedly connected, and the lower end of the drive shaft 24 passes through pressure head connector 8 and the pressure through shell First 11 connection, the middle part of the drive shaft 24 is connected by flexible support spring 26 with the outer casing inner wall；

The high accuracy for being included in load for measuring vertical direction is sequentially provided with the drive shaft 24 from top to bottom to erect Straight load transducer 25, for measuring the flat capacitance sensor 27 for being included in depth on vertical direction, for measuring level side To the high level of accuracy load transducer 28 for being included in load, between the right side of the drive shaft 24 and the outer casing inner wall also Provided with eddy current displacement sensor, the Target Board 29 of the eddy current displacement sensor and the high level of accuracy load transducer 28 are located at the right side and left side of the drive shaft 24 respectively, and the probe 30 of the eddy current displacement sensor is arranged on described outer Just to arrangement on shell inwall and with the Target Board 29 or so of eddy current displacement sensor.Eddy current displacement sensor measurement driving master Offset of the axle 24 relative to vertical direction.

Further, the upper end of the vertical leading screw 3 is provided with upper limit ring 2, and the lower end of the vertical leading screw 3 is provided with lower limit Position ring 9.

Further, the bottom corner of the base is respectively equipped with four Magnetic gauge stands 12, two neighboring Magnetic gauge stand it Between formed V-type neck.

In the present embodiment, frame is made up of base, column 1 and crossbeam 4；The load that is included in of vertical direction is vertical load Lotus, horizontal direction is included in load as horizontal load；The vertical load transducer 25 of high accuracy is that high-precision contact is vertical Load transducer；Horizontal screw lead nut is the sliding block 32 for being threaded hole 33.

As shown in figure 5, adjustment motor 6 can be screw-threaded shaft elevator vertically, vertical leading screw is ball-screw, vertical adjustment be by The vertical feed screw nut of vertical adjustment motor 6 and vertical leading screw 3 coordinates, and because vertical leading screw 3 is fixed, crossbeam 4 is to be located at The top of vertical feed screw nut, due to the up and down motion of vertical feed screw nut, so as to promote crossbeam 4 thereon along double columns 1 In the vertical direction is adjusted, and realizes the adjustment that the workbench 15 being connected on crossbeam 4 is lifted in vertical direction, first step The object lens of seamless first 11 and micro- part 13 are to the distance of tested structural member surface, and double columns 1 ensure that the linear of vertical direction Degree, lock valve 5 is locked to crossbeam 4, it is ensured that the stability and precision of vertical direction in the course of work, while the upper limit Position ring 2 and lower limit ring 9 ensure the extreme position occurred during vertical adjustment, to prevent machine from situation occur or artificial Do not occur accident when operated, so as to prevent from damaging machine or the person.Horizontal adjustment is driven by horizontal adjustment motor 19 The dynamic workbench 15 coordinated with horizontal screw lead 18 is adjusted in the horizontal direction along guide rail 17, and guide rail 17 ensure that horizontal adjustment Precision, due to can continuous horizontal adjustment pressure head 11 position, it is possible to realize continuous test.

It is described to be included in the two ends that test module and in-situ observation module are arranged on workbench 15, be included in test process be by The piezoelectric ceramic actuator 16 of horizontal drive is provided and the mutual cooperation of electromagnetic actuator device 7 driven vertically is provided and is completed, electromagnetism The in the vertical direction of drive device 7 carries out the application of two grades of load using loading coil 22, and drive connection is on pressure head connector 8 The in the vertical direction of pressure head 11 be pressed into, while by the piezoelectric ceramic actuator between workbench 15 and guide rail 17 16 provide the secondary drive in horizontal direction, and drive ram 11 is produced with sample in the horizontal direction while vertical direction is pressed into Raw relative motion, both are included in test at the completion that cooperates.The test module that is included in is to provide press-in by electromagnetic actuator device Power, coil is made using the relatively low material of resistivity, in magnetic cylinder, have electric current by when produce driving force, using the teaching of the invention it is possible to provide High-precision linear load.The test module that is included in is passed using high-precision non-contact displacement transducer and contact load Sensor, accurately can delicately measure displacement and load；The pressure head connector for being included in test module there is provided standard interface, It is easily installed and replaceable pressure head.

In-situ observation module is by the horizontal adjustment component control in workbench adjusting module, after the completion of test is included in By the position of horizontal adjustment workbench, the micro- part 13 on workbench 15 is moved to and is included in test zone Carry out observation in situ.Microscopic observation part 13 is connected on workbench 15 by Nosepiece 14, can be with automatic identification With seizure scored area, the observation and analysis to cut is realized.Micro- part 13 is standard interface, can be according to different operating mode need Ask, easily install and change different amplification (10 ×, 20 ×, 40 ×) object lens；Micro- part 13 possesses auto-focusing And image identification function, automatic identification seizure scored area, improve testing efficiency and precision.

The bottom of base is made up of four Magnetic gauge stands 12, because Magnetic gauge stand is mutually V-type two-by-two, can be stably in quilt The surface of geodesic structure part is installed and fixed, so as to provide support to be included in test.

Signal control module 10 is used to be converted to the digital command signal received from computer after drive voltage signal It is sent to and is included in test module, and will turns from the vertical load, horizontal load, shift simulation signal that are included in test module reception It is changed to data-signal and is sent to computer.

The computer, for sending and receiving instruction, while analyzing test data, the tested structure of calculating or material Mechanical property parameters.

As shown in fig. 6, wherein, 24 be drive shaft, it is movable part, it is necessary to which strict limitation is moved along one-dimensional square；25 For the vertical load transducer of high accuracy, using the teaching of the invention it is possible to provide accurately sensitively record vertical direction is included in load；26 be two layers up and down Flexible support spring, movable part and ensure that it is moved along one-dimensional square for suspending；27 be flat capacitance sensor, is used for Depth is included on measurement vertical direction；28 be high level of accuracy load transducer, and accurate recording is included in test in the horizontal direction Be included in load；29 and 30 be respectively the Target Board and probe of eddy current displacement sensor, and current vortex sensor, which is used to measure, presses Head during being included in relative to home position level skew；When loading coil 23 is powered, loading coil 23 can be by Electromagnetic force driving is moved downward, so as to provide the power for being included in test in vertical direction.

As shown in 7 figures, guide rail 17, which is fixed on by four screwed holes 31 in the lower section of crossbeam 4, sliding block 32, left and right insertion Screwed hole 33 coordinate with horizontal screw lead 18, horizontal screw lead 18 is driven by horizontal adjustment motor 19, makes sliding block 32 along guide rail 17 Level is slided, and the lower section of sliding block 32 has piezoelectric ceramic actuator 16 to connect workbench 15.

Workflow of the present utility model is：

(1) start, testing instruments state.Energized equipment can generate heat when working, and cause temperature fluctuation, should shift to an earlier date half an hour Start preheating above.Treat instrument stabilizer, using standard reference sample, examine indirectly this be included in test system whether normal work. If normal, official testing is carried out.

(2) roughing test zone.By the surface of the tested structural member of observation, test zone is tentatively selected.

(3) test zone is determined.Tester is arranged on tested structural member, it is desirable to which pressure head 11 hangs down with surface to be measured Directly, it is pressed into ensure that pressure head 11 is vertical.The distance between workbench 15 and pipeline are adjusted, passes through horizontal adjustment switch between components To observation mode, whether the test zone for observing roughing using micro- part 13 meets test request.Enter if meeting and requiring Row next step, region to be measured is chosen in the position of horizontal adjustment pressure head 11 again if being unsatisfactory for, and next pacing is carried out if meeting Parameter setting is tried, if being repeatedly still unsatisfactory for after horizontal adjustment, the operation of previous step roughing test zone is repeated.

(4) test parameter is set.After selected good suitable test zone, by the suitable test parameter of computer installation, Such as load mode, depth is included in, length is included in, is included in speed and vertical load.

(5) test is completed.According to test parameter is set, start test, wait completion to be tested.

(6) observe, measure cut.Be included in after the completion of test, switch to observation mode, observed using micro- part 13 and Automatic identification catches scored area, and the morphological feature of cut is fed back into computer.

(7) test data, generation test result report are handled.Computer can combine vertical load, horizontal load and be included in The cut result that depth curve and micro- part 13 are recognized is handled, and the analysis method that can be selected according to user, from Dynamic analyzing and processing test data, calculates related mechanics parameter, such as film substrate bond strength, coefficient of friction and material surface roughness Deng, and generate test result report.

The utility model uses unitary design, and rack construction is stable, and deformation is missed caused by stand stretch during being included in Difference is small, and measurement is accurate；Meanwhile, horizontal adjustment motor 19 can be adjusted freely in the horizontal direction, therefore can continuously select to survey Region is tried, once mounting, multiple follow-on test is realized.

Claims

1. A portable test system is characterized in that: it includes a test device and a computer, and the test device includes a base and a working platform adjustment module installed on the base, a test module, and an in-situ observation module , a signal measurement and control module and a power supply module; the working platform adjustment module, the inclusion test module, the in-situ observation module, and the signal measurement and control module are respectively connected to the power supply module;

The middle part of the base is provided with an opening for testing the structural member to be tested, and the left and right sides of the opening are respectively symmetrically arranged with columns, and the beam can slide up and down on the column; the insertion test module, in-situ observation The modules are all located above the opening;

The work platform adjustment module includes a vertical adjustment assembly, a horizontal adjustment assembly and a work platform, the vertical adjustment assembly includes a vertical adjustment motor and a vertical lead screw, the lower end of the vertical lead screw is fixed on the base , the upper end of the vertical lead screw is fixedly connected with the column, the vertical lead screw nut that can move up and down is set on the vertical lead screw, the vertical adjustment motor is installed at the bottom of the beam and its power output end is connected to the The vertical lead screw nut is connected, and the crossbeam can slide up and down at the same time on the vertical lead screw and is located above the vertical lead screw nut; the vertical adjustment assembly is provided with two, respectively A vertical adjustment assembly and a second vertical adjustment assembly, the vertical lead screw of the first vertical adjustment assembly is located on the left side of the column on the left side of the opening, and the left end of the crossbeam is located at the top of the first vertical adjustment assembly Above the vertical lead screw nut, the vertical adjustment motor of the first vertical adjustment assembly is installed on the bottom of the left end of the crossbeam, and the vertical lead screw of the second vertical adjustment assembly is located on the right side of the opening. On the right side, the right end of the crossbeam is located above the vertical lead screw nut of the second vertical adjustment assembly, and the vertical adjustment motor of the second vertical adjustment assembly is installed at the bottom of the right end of the crossbeam;

The horizontal adjustment assembly includes a horizontal adjustment motor, a horizontal screw and a guide rail, the horizontal screw is located above the opening and installed below the middle of the beam, the horizontal adjustment motor is installed on the beam and its power The output end is connected with the horizontal lead screw, the upper part of the guide rail is fixedly installed under the middle part of the beam, and the horizontal lead screw nut on the horizontal lead screw is installed at the lower part of the guide rail and forms a left and right sliding pair with the guide rail;

The entry test module includes a piezoelectric ceramic driver for horizontal driving, an electromagnetic driver for vertical driving and an indenter, the horizontal lead screw nut is connected to the top of the working platform through the piezoelectric ceramic driver, The upper end of the electromagnetic drive device is fixedly connected to the bottom of the working platform, and the lower end of the electromagnetic drive device is connected to the indenter through an indenter connector;

The in-situ observation module is arranged side by side with the electromagnetic drive device, the in-situ observation module includes a microscopic component and an objective lens converter, and the microscopic component is installed on the bottom of the working platform through the objective lens converter;

The vertical adjustment motor, horizontal adjustment motor, piezoelectric ceramic driver, electromagnetic driving device, and microscopic components are respectively connected to the computer through the signal measurement and control module.

2. A portable scratch-in testing system as claimed in claim 1, characterized in that: said electromagnetic drive device comprises a housing and two magnetic cylinders, a loading coil and a driving spindle arranged in the housing, and said loading coil is located at Between the two magnetic cylinders, the upper end of the drive spindle is fixedly connected to the lower end of the loading coil, the lower end of the drive spindle passes through the shell and is connected to the indenter through the indenter connector, and the middle part of the drive spindle connected to the inner wall of the housing through a flexible support spring;

A high-precision vertical load sensor for measuring the inscribed load in the vertical direction, a flat plate capacitive sensor for measuring the inscribed depth in the vertical direction, and a flat plate capacitive sensor for measuring the inscribed depth in the horizontal direction are arranged in sequence from top to bottom on the drive spindle. A high-precision horizontal load sensor for the inscribed load, an eddy current displacement sensor is also provided between the right side of the drive spindle and the inner wall of the housing, and the target plate of the eddy current displacement sensor is connected to the high-precision horizontal load sensor Located on the right and left sides of the drive spindle respectively, the probes of the eddy current displacement sensor are installed on the inner wall of the housing and arranged right and left opposite to the target plate of the eddy current displacement sensor.

3. A portable scratch-in test system as claimed in claim 1 or 2, characterized in that: the upper end of the vertical lead screw is provided with an upper limit ring, and the lower end of the vertical lead screw is provided with a lower limit ring .

4. A portable scratch-in test system as claimed in claim 1 or 2, characterized in that: four magnetic watch bases are respectively provided at the four corners of the bottom of the base, and a V-shape is formed between two adjacent magnetic watch bases. card slot.

5. A portable scratch-in test system according to claim 1 or 2, characterized in that a protective cover is provided outside the scratch-in test device.