Clamping device for OTA testing

Abstract

The application relates to the technical field of semiconductor testing, and particularly discloses a clamping device for OTA (Over-the-Air) testing, which is used for clamping multiple mobile phones to be tested, has high mobile phone adjusting and replacing efficiency, and is low in testing cost. The clamping device comprises a shell, a rotating mechanism, a gripping mechanism and a control unit which are accommodated in the shell, and a detection opening is arranged at the top of the shell. The rotating mechanism comprises a rotating disc and a first driving piece for driving the rotating disc to rotate, a plurality of clamping positions with bottom parts respectively provided with through channels are arranged on the circumference of the rotating disc, the gripping mechanism comprises a clamping piece, a second driving piece for driving the clamping piece to ascend and descend, and a third driving piece for driving the clamping piece to rotate, and the control unit comprises an MCU chip. After a preset clamping position is aligned with the detection opening, the second driving piece drives the clamping piece to pass through the through channel and cooperate with the mobile phone on the clamping position under the control of the MCU chip, and the mobile phone is pushed to the outside of the shell through the detection opening. After single detection of the mobile phone is completed, the third driving piece drives the clamping piece to rotate under the control of the MCU chip, so that the angle of the mobile phone is adjusted.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of semiconductor testing, in particular to a clamping device for OTA testing. BACKGROUND

[0002] OTA (Over The Air) testing is a method for evaluating the performance of a mobile phone radio frequency, which detects the radiation of a mobile phone to develop measures to improve the radiation emission and reception indicators of a mobile phone, to solve the problems of poor mobile phone signal, poor voice call quality and easy disconnection. In addition, through the detection of the performance of the mobile phone radio frequency, it is beneficial to develop a mobile phone radio frequency optimization scheme to reduce the electromagnetic coupling effect of the human body and the antenna and reduce the impact of mobile phone radiation on human health.

[0003] At present, in the OTA test, a fixture is generally set in the test room, and the mobile phone to be tested is installed on the fixture for testing. Since the fixture has a simple structure and single function, the staff needs to enter the test room regularly to adjust the position of the mobile phone or replace the new mobile phone to be tested. The efficiency of manual adjustment and replacement of the mobile phone to be tested is low, which will affect the normal testing. In addition, due to the limitation of the test period, the mobile phone needs to be replaced and adjusted every certain period of time, and special personnel are needed to work, the labor cost of testing is high, and the overall cost of OTA testing is increased. SUMMARY

[0004] Therefore, it is necessary to provide a clamping device for OTA testing in view of the technical problems of low adjustment and replacement efficiency of the mobile phone and high detection cost.

[0005] A clamping device for OTA testing, the clamping device comprises a shell arranged in a test room, and a rotating mechanism, a gripping mechanism and a control unit accommodated in the inner cavity of the shell, a detection port is formed in the top of the shell; the rotating mechanism comprises a rotating disc and a first driving member for driving the rotating disc to rotate, a plurality of clamping positions for fixing the mobile phone to be tested are arranged on the rotating disc along the circumferential direction of the rotating disc, and a through channel is arranged at the bottom of each clamping position; the gripping mechanism comprises a clamping member, a second driving member for driving the clamping member to lift and a third driving member for driving the clamping member to rotate; the control unit comprises an MCU chip electrically connected with the first driving member, the second driving member and the third driving member respectively;

[0006] After the MCU chip controls the first driving member to work and rotates the rotating disc to the preset clamping position to align with the detection port, the second driving member drives the clamping member to pass through the through channel and cooperate with the mobile phone on the clamping position under the control of the MCU chip, and the mobile phone is pushed to the outside of the shell through the detection port; after the single test of the mobile phone is completed, the third driving member drives the clamping member to rotate under the control of the MCU chip to adjust the angle of the mobile phone.

[0007] In one of the embodiments, the control unit further comprises a timer electrically connected with the MCU chip.

[0008] In one of the embodiments, the control unit further comprises a communication module electrically connected with the MCU chip, and each mobile phone is connected with the MCU chip through the communication module; when the clamping member cooperates with one of the mobile phones, the MCU chip controls the remaining mobile phones to switch to the flight mode.

[0009] In one of the embodiments, the clamping device further comprises a charging unit connected with the MCU chip, and the charging unit comprises a plurality of charging heads corresponding to the mobile phones for providing power supply for the mobile phones.

[0010] In one of the embodiments, a fixing sleeve fixedly cooperating with the mobile phone is embedded on each clamping position, and a bar code associated with the information of the mobile phone is attached to each fixing sleeve.

[0011] In one of the embodiments, the clamping device further comprises a code scanner electrically connected with the MCU chip, and the code scanner is used for scanning and obtaining the bar code information.

[0012] In one of the embodiments, the clamping device further comprises a visual monitoring mechanism electrically connected with the MCU chip, and the visual monitoring mechanism is used for positioning the predetermined part on the mobile phone; when the visual monitoring mechanism successfully positions the mobile phone, the visual monitoring mechanism sends an instruction to the MCU chip to control the first driving member to stop working and test the mobile phone; when the visual monitoring mechanism fails to position the mobile phone, the visual monitoring mechanism marks the mobile phone and feeds back the marking information to the MCU chip, and the MCU chip receives the feedback information and controls the first driving member to work to drive the clamping member to reversely retreat to the inner cavity of the shell through the detection port and place the mobile phone on the clamping position.

[0013] In one of the embodiments, a plug hole is formed in the bottom of the fixing sleeve, a plug pin is arranged on the clamping member to be in concave-convex cooperation with the plug hole, and a convex or concave pattern is arranged on the inner surface of the plug hole to limit the relative rotation of the plug pin.

[0014] In one of the embodiments, the clamping device further comprises a movable door slidingly arranged at the detection opening to block or open the detection opening, and a fourth driving member driving the movable door to slide, a clearance gap is formed at a free end of the movable door and is adapted to the shape of the side surface of the shackle ring; when the mobile phone is tested, the edge of the clearance gap abuts against the side surface of the shackle ring to block the detection opening.

[0015] In one of the embodiments, the shell is made of wave-absorbing material.

[0016] The clamping device for OTA test is implemented, a plurality of mobile phones to be tested can be clamped at one time by arranging a plurality of clamping positions on the turntable, and each mobile phone is tested in turn, the angle of the mobile phone can be adjusted by the gripping mechanism while the mobile phone to be tested is pushed out of the shell for testing, the mobile phone does not need to be frequently adjusted or replaced by the operator, the efficiency of mobile phone adjustment and replacement is improved, the mobile phone test period is shortened, the labor cost is reduced, and the overall cost of OTA test is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 FIG. 1 is a structural schematic diagram of the clamping device in one embodiment of the present application;

[0018] Figure 2 FIG. 2 is a structural schematic diagram of the clamping device after the shell is removed in the embodiment shown in FIG. 1; Figure 1

[0019] Figure 3 FIG. 3 is a structural schematic diagram of the gripping mechanism in one embodiment of the present application;

[0020] Figure 4 FIG. 4 is a structural schematic diagram of the cooperation between the fixing sleeve and the shackle in one embodiment of the present application;

[0021] Figure 5 FIG. 5 is a module structural schematic diagram of the clamping device in one embodiment of the present application. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings. In the following description, a large number of specific details are set forth in order to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the scope of the present application, therefore the present application is not limited to the specific embodiments disclosed below.

[0023] ​The application discloses a clamping device 10 for OTA test, which can clamp multiple mobile phones to be tested at a time. During the OTA test process, the clamping device grabs each mobile phone to be tested one by one and performs each radio frequency performance test on each mobile phone to be tested. After the test of a single mobile phone is completed, the mobile phone is placed back to the clamping position 230, and then the position of the rotating disc 210 is adjusted to grab the next mobile phone to be tested and perform each test one by one. In this way, personnel do not need to frequently enter the test room to replace the mobile phone or adjust the angle of the mobile phone, on the one hand, the interference on the test result caused by the personnel misoperation is reduced, the efficiency of the mobile phone replacement and adjustment is improved, the test suspension time is shorter, and the mobile phone test period is shortened; on the other hand, the manual operation amount is reduced, so that the labor cost and the test cost are reduced.

[0024] Please combine Figure 1 with Figure 2 The clamping device of the embodiment comprises a shell 100 arranged in a test room and a rotating mechanism 200, a grabbing mechanism 300 and a control unit 400 accommodated in the inner cavity of the shell 100. The shell 100 is in a hollow cylindrical structure, the bottom of the shell 100 is provided with a base to lift the bottom height of the shell 100, and the top of the shell is provided with a detection port 110, which is used as a moving channel of the mobile phone to be tested, so as to expose the mobile phone in the inner cavity of the shell 100 to the test environment of the test room for detection. Of course, the shell 100 can also be designed as a hollow polygonal structure. In an embodiment, the shell 100 is made of a wave-absorbing material, for example, the shell 100 is made of graphene, silicon carbide or carbon fiber material, and the shell 100 can also be coated with a coating made of a wave-absorbing material on the outer surface, so as to absorb or greatly weaken the electromagnetic wave energy received by the surface of the shell 100, and weaken the influence of the shell 100 and the mechanism in the inner cavity of the shell 100 on the OTA test result.

[0025] Please combine Figure 1 , Figure 2 and Figure 5, the rotating mechanism 200 comprises a rotating disc 210 and a first driving member 220 for driving the rotating disc 210 to rotate, a plurality of clamping positions 230 for fixing the mobile phone to be tested are arranged on the rotating disc 210 along the circumferential direction of the rotating disc 210, and a bottom portion of each clamping position 230 is respectively provided with a through channel 240; the gripping mechanism 300 comprises a clamping member 310, a second driving member 320 for driving the clamping member 310 to ascend and descend, and a third driving member 330 for driving the clamping member 310 to rotate; and the control unit 400 comprises an MCU chip 410 electrically connected with the first driving member 220, the second driving member 320 and the third driving member 330 respectively. In the OTA test process, after the MCU chip 410 controls the first driving member 220 to work and makes the rotating disc 210 rotate to the preset clamping position 230 to align the detection port 110, it can also be understood that, when the predetermined mobile phone moves to the waiting gripping position, the second driving member 320 drives the clamping member 310 to pass through the through channel 240 and cooperate with the mobile phone to be tested on the clamping position 230 under the control of the MCU chip 410, and the mobile phone to be tested is pushed to the outside of the shell 100 through the detection port 110; after the single test of the mobile phone to be tested is completed, the third driving member 330 drives the clamping member 310 to rotate under the control of the MCU chip 410, so as to adjust the angle of the mobile phone to be tested, so that the mobile phone is tested at the predetermined angle.

[0026] The rotating mechanism 200 is used for receiving the mobile phone to be tested and driving the mobile phone to be tested to rotate, so that each mobile phone sequentially passes through the waiting gripping position and is gripped by the gripping mechanism 300 to perform series test. In an embodiment, the rotating mechanism 200 further comprises a mounting bracket 250 for supporting the rotating disc 210 and the first driving member 220, the rotating disc 210 is rotatably arranged on the top of the mounting bracket 250, the first driving member 220 is fixed on the bottom of the mounting bracket 250 and is drivingly connected with the rotating disc 210, and the first driving member 220 is a servo motor. Preferably, an arc groove 251 matched with the edge of the rotating disc 210 is further arranged on the mounting bracket 250, and the opening of the arc groove 251 faces the center of the mounting bracket 250. The arc groove 251 is used for limiting the rotation track of the rotating disc 210 to prevent the rotating disc 210 from shaking during rotation, and the inner wall of the arc groove 251 is further used for supporting the rotating disc 210 to reduce the load of the output end of the first driving member 220, prevent the output end of the first driving member 220 from being damaged or broken, and prolong the service life of the clamping device.

[0027] The gripping mechanism 300 is fixed on the mounting bracket 250 or the base of the shell 100, and is used for adjusting the height and angle of the mobile phone to be tested. Please refer to Figure 2 and Figure 3The gripping mechanism 300 further comprises a vertical plate 340 fixed on the mounting bracket 250, the second driving member 320 comprises a lifting motor 321 fixed on the vertical plate 340 and having an output end penetrating the vertical plate 340, a first belt pulley 322 drivingly connected with the lifting motor 321, a second belt pulley 323 mounted on the vertical plate 340 away from the lifting motor 321, a transmission belt 324 wound around the first belt pulley 322 and the second belt pulley 323, and a lifting transmission member 325 mounted on the transmission belt 324, the transmission belt 324 is provided with a rack structure, and the lifting transmission member 325 is engaged with the rack structure to ensure the stability of the movement of the lifting transmission member 325. The third driving member 330 comprises a rotating motor 331, a transmission rod 332 penetrating the lifting transmission member 325 and drivingly connected with an output end of the rotating motor 331, and the clamping member 310 mounted on the end of the transmission rod 332, the lifting motor 321 and the rotating motor 331 are electrically connected with the MCU chip 410 respectively, and the lifting motor 321 is a servo motor.

[0028] In the embodiment, the clamping member 310 is a push rod structure, the axial direction of the transmission rod 332 is perpendicular to the axial direction of the first belt pulley 322, that is, the lifting motor 321 is horizontally arranged, the rotating motor 331 is vertically arranged, and the transmission rod 332 is rotatably arranged on the lifting transmission member 325 through the cooperation of the bearing and the bearing seat. In this way, when the lifting motor 321 receives the instruction sent by the MCU chip 410, the lifting motor 321 drives the first belt pulley 322 and the second belt pulley 323 to rotate, thereby driving the lifting transmission member 325 to move up and down in the vertical direction, and further driving the rotating motor 331, the transmission rod 332 and the clamping member 310 to move up and down, so as to adjust the height of the mobile phone to be tested on the clamping member 310, so as to push the mobile phone to be tested to the outside of the shell 100 or put the mobile phone after the test back to the clamping position 230 in the inner cavity of the shell 100. When the rotating motor 331 receives the instruction sent by the MCU chip 410, the transmission rod 332 is driven to rotate, thereby driving the clamping member 310 to rotate, so as to adjust the angle of the mobile phone to be tested on the clamping member 310.

[0029] In an embodiment, each clamping position 230 is embedded with a fixed sleeve 260 fixedly matched with the mobile phone to be tested, and each fixed sleeve 260 is attached with a bar code associated with the information of the mobile phone to be tested. In actual test operation, the new bar code associated with the mobile phone to be tested can be re-pasted on the fixed sleeve 260 when the mobile phone to be clamped is changed, or the information of the mobile phone corresponding to each bar code can be directly input on the upper computer connected with the MCU chip 410. Please refer to Figure 5Further, the clamping device further comprises a code scanner 500 electrically connected to the MCU chip 410, and the code scanner 500 is configured to scan and acquire the bar code information. Thus, before testing a mobile phone, the MCU chip 410 controls the second driving member 320 to act and the clamping member 310 to grab the mobile phone to be tested. When the mobile phone passes through the detection opening 110, the code scanner 500 acquires the bar code information on the fixing sleeve 260 and sends the bar code information to the MCU chip 410. The MCU chip 410 further sends the information to an external host computer for storage. Thus, the external test system can associate the test result with the mobile phone information, so as to obtain the test data of each mobile phone.

[0030] Please refer to Figure 3 and Figure 4 In an embodiment, the bottom of the fixing sleeve 260 is provided with a insertion hole 261, and the clamping member 310 is provided with a insertion pin 311 matched with the insertion hole 261. The inner surface of the insertion hole 261 is provided with a convex or concave pattern for limiting the relative rotation of the insertion pin 311. For example, the insertion hole 261 is provided with vertical stripes extending along the depth direction of the insertion hole 261, and the outer surface of the insertion pin 311 is matched with the inner surface of the insertion hole 261. Thus, when the insertion pin 311 is inserted into the insertion hole 261, the insertion pin 311 is difficult to rotate relative to the insertion hole 261 under the constraint of the vertical stripes. That is, the insertion pin 311 and the fixing sleeve 260 are limited in the radial direction of the insertion pin 311, so as to ensure that the insertion pin 311 can drive the fixing sleeve 260 and the mobile phone to rotate stably under the driving of the transmission rod 332. Figure 4 The dashed line shown in the figure is a mobile phone to be tested.

[0031] Please refer to Figure 1In an embodiment, the clamping device further comprises a movable door 120 slidingly arranged at the detection opening 110 to block or open the detection opening 110, and a fourth driving member 130 driving the movable door 120 to slide, a free end of the movable door 120 is provided with a clearance gap 121 matching the shape of the ring side of the pin 311; when testing the mobile phone, the edge of the clearance gap 121 abuts against the ring side of the pin 311 to block the detection opening 110. Preferably, the fourth driving member 130 is an electric push rod electrically connected with the MCU chip 410. It should be noted that the top of the shell 100 is further provided with a notch matching the clearance gap 121 at the edge of the detection opening 110, and the bottom of the vertical plate 340 of the gripping mechanism 300 is further provided with a spring, so that when the movable door 120 is closed, the movable door 120 will push the transmission rod 332, and the spring will be elongated to move the transmission rod 332 to the edge of the shell 100. In this way, when the mobile phone to be tested needs to be replaced, the MCU chip 410 controls the fourth driving member 130 to work to open the movable door 120, so as to facilitate the gripping member 310 to lift the mobile phone; after the mobile phone is adjusted to rise, that is, after the mobile phone to be tested is pushed out of the inner cavity of the shell 100, the MCU chip 410 controls the fourth driving member 130 to work and closes the movable door 120, and the detection opening 110 is blocked to weaken the influence of the internal components of the shell 100 on the OTA test, and facilitate the OTA test operation or the adjustment of the angle of the mobile phone.

[0032] Please refer to Figure 5 The control unit 400 further comprises a timer 420 electrically connected with the MCU chip 410. Before the OTA test, the operator can input the cycle of each link of the OTA test through the upper computer connected with the MCU chip 410, that is, define the working parameters of the timer 420, so that when the MCU chip 410 controls the first driving member 220 and the second driving member 320 to work and the mobile phone to be tested is pushed out of the inner cavity of the shell 100, and after the test is performed for a specified time, the MCU chip 410 receives the signal sent by the timer 420 and controls the third driving member 330 to work to adjust the mobile phone to the first angle, and after the mobile phone is adjusted to the first angle and the test is performed for a specified time, the MCU chip 410 receives the signal sent by the timer 420 and controls the third driving member 330 to work to adjust the mobile phone to the second angle, and so on, until the mobile phone is tested at the specified multiple angles, the MCU chip 410 receives the signal sent by the timer 420 and controls the second driving member 320 to work to put the mobile phone back to the clamping position 230 in the shell 100, so as to facilitate the test of the next mobile phone.

[0033] In an embodiment, the control unit 400 further comprises a communication module 600 electrically connected with the MCU chip 410, each mobile phone to be tested is connected with the MCU chip 410 through the communication module 600, when the clamping member 310 cooperates with one of the mobile phones to be tested, the MCU chip 410 controls the remaining mobile phones to be tested to switch to the flight mode. That is, during the OTA test of the mobile phone, only the mobile phone to be tested is ensured to have signal, and the remaining mobile phones enter the flight mode, so as to eliminate the interference of the signals of the remaining mobile phones to the signal of the mobile phone to be tested, and improve the accuracy and reliability of the test result. In the embodiment, the MCU chip 410 identifies the mobile phone to be tested after receiving the barcode information sent by the code scanner 500, and switches the corresponding mobile phone from the flight mode to the normal working mode according to the barcode information, and switches the remaining mobile phones to the flight mode.

[0034] In order to prolong the standby time of the mobile phone to be tested and ensure that each mobile phone can work normally during the test, the clamping device further comprises a charging unit 700 connected with the MCU chip 410, the charging unit 700 comprises a plurality of charging heads corresponding to each mobile phone to be tested, and is used for providing power supply for the mobile phone to be tested. In the embodiment, the charging unit 700 can also be installed on the turntable 210, and each charging head is correspondingly arranged on the clamping position 230. Preferably, the fixing sleeve 260 is provided with a conversion port matched with the charging port of the mobile phone, and the conversion port is electrically connected with the charging head arranged on the side of the clamping position 230. In this way, when the mobile phone is embedded in the clamping position 230 together with the fixing sleeve 260, the charging head on the clamping position 230 can continuously charge the mobile phone, so as to prolong the endurance time of the mobile phone, and avoid the knotting of the charging wire, so as to ensure the normal operation of the OTA test.

[0035] In an embodiment, the clamping device further comprises a visual monitoring mechanism 800 electrically connected to the MCU chip 410, and the visual monitoring mechanism 800 is used for positioning a predetermined part on the mobile phone to be tested. Preferably, the visual monitoring mechanism 800 is an infrared sensor, a laser sensor or an image sensor with image recognition function. When the visual monitoring mechanism 800 successfully positions the mobile phone to be tested, that is, detects the preset part on the mobile phone, it is judged that the mobile phone has been adjusted to the testing position, and the visual monitoring mechanism 800 sends a command to the MCU chip 410 to make the MCU chip 410 control the first driving member 220 to stop working and perform mobile phone testing. When the visual monitoring mechanism 800 fails to position the mobile phone to be tested, that is, the visual monitoring mechanism fails to detect the preset part on the mobile phone during the entire lifting process of the mobile phone, in this case, the mobile phone may be tilted or inverted. Therefore, the visual monitoring mechanism 800 marks the mobile phone that fails to be positioned and feeds back the marking information to the MCU chip 410, and the MCU chip 410 receives the feedback information and controls the first driving member 220 to work to drive the clamping member 310 to reversely retreat into the inner cavity of the shell 100 and place the mobile phone on the clamping position 230. Subsequently, the MCU chip 410 controls the first driving member 220 to work and rotate the next mobile phone to be tested to the position corresponding to the detection opening 110, so as to test the next mobile phone.

[0036] The clamping device 10 for OTA testing according to the present application can clamp a plurality of mobile phones to be tested at one time and detect each mobile phone in turn by arranging a plurality of clamping positions 230 on the rotating disc 210. The gripping mechanism 300 can adjust the angle of the mobile phone to be tested while pushing the mobile phone out of the shell 100 for detection, so that the operator does not need to frequently adjust or replace the mobile phone. In this way, the efficiency of adjusting and replacing the mobile phone is improved, the testing period of the mobile phone is shortened, the labor cost is reduced, and the overall cost of OTA testing is reduced.

[0037] The technical features of the above embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not conflict, they should be considered within the scope of the present application.

[0038] The above embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. A clamping device for OTA testing, characterized in that, The utility model relates to a mobile phone testing device, which comprises a shell arranged in a test chamber, a rotating mechanism, a clamping mechanism and a control unit accommodated in the inner cavity of the shell, and a detection port is formed in the top of the shell. The rotating mechanism comprises a rotating disc and a first driving element for driving the rotating disc to rotate, and a plurality of clamping positions for fixing the mobile phone to be tested are arranged on the rotating disc along the circumferential direction of the rotating disc. Each clamping position is provided with a through channel at the bottom.

2. The clamping device for OTA testing according to claim 1, characterized in that, The clamping mechanism comprises a clamping element, a second driving element for driving the clamping element to ascend and descend, and a third driving element for driving the clamping element to rotate.

3. The clamping device for OTA testing of claim 1, wherein, The control unit comprises an MCU chip electrically connected with the first driving element, the second driving element and the third driving element.

4. The clamping device for OTA testing of claim 1, wherein, After the rotating disc is rotated to the preset clamping position aligned with the detection port under the control of the MCU chip, the second driving element drives the clamping element to pass through the through channel and cooperate with the mobile phone to be tested on the clamping position, so as to push the mobile phone to be tested to the outside of the shell through the detection port.

5. The clamping device for OTA testing of claim 1, wherein, After the single test of the mobile phone to be tested is completed, the third driving element is controlled by the MCU chip to drive the clamping element to rotate, so as to adjust the angle of the mobile phone to be tested.

6. The clamping device for OTA testing according to claim 5, wherein, A fixing sleeve fixedly matched with the mobile phone to be tested is embedded on each clamping position.

7. The clamping device for OTA testing of claim 5, wherein, The bottom of the fixing sleeve is provided with a insertion hole.

8. The clamping device for OTA testing of claim 1, wherein, The clamping element is provided with a insertion pin matched with the insertion hole. The control unit further comprises a timer electrically connected with the MCU chip. The control unit further comprises a communication module electrically connected with the MCU chip, and each mobile phone to be tested is connected with the MCU chip through the communication module. When the clamping element cooperates with one of the mobile phones to be tested, the MCU chip controls the remaining mobile phones to be tested to switch to the flight mode. A charging unit connected with the MCU chip is further provided. Each fixing sleeve is attached with a bar code associated with the information of the mobile phone to be tested. A code scanner electrically connected with the MCU chip is further provided. The code scanner is used for scanning and acquiring the bar code information. A visual monitoring mechanism electrically connected with the MCU chip is further provided. The visual monitoring mechanism is used for positioning the predetermined part on the mobile phone to be tested. When the visual monitoring mechanism successfully positions the mobile phone to be tested, the visual monitoring mechanism sends an instruction to the MCU chip, so that the MCU chip controls the first driving element to stop working and test the mobile phone. When the visual monitoring mechanism fails to position the mobile phone to be tested, the visual monitoring mechanism marks the mobile phone and feeds back the marking information to the MCU chip. The MCU chip receives the feedback information and controls the first driving element to work, so that the clamping element reversely retreats to the inner cavity of the shell through the detection port and places the mobile phone on the clamping position. The inner surface of the insertion hole is provided with a convex or concave pattern for limiting the relative rotation of the insertion pin.

9. The clamping device for OTA testing according to claim 8, characterized in that, The application further comprises a movable door slidingly arranged at the detection opening to block or open the detection opening, and a fourth driving member driving the movable door to slide, a clearance gap corresponding to the shape of the side surface of the shackle ring is formed at the free end of the movable door; when the mobile phone is tested, the edge of the clearance gap abuts against the side surface of the shackle ring to block the detection opening.

10. The clamping device for OTA testing according to any one of claims 1 to 9, characterized in that, The shell is made of a wave-absorbing material.

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