阅读说明：本技术 一种检测自动开锁器动作时间的装置及检测方法 (Device and method for detecting action time of automatic unlocking device ) 是由 李另明 马骏 谭又安 何伟 于 2020-12-25 设计创作，主要内容包括：本发明属于航空救生仪表的测试技术,涉及一种检测自动开锁器动作时间的装置及检测方法。本发明是在模拟高度相应的负压状态下,用软锁针替代高度膜盒准确锁定自动开锁器到达预定开锁高度时的杠杆位置,待自动开锁器所处环境恢复到当地气压后,再通过光电感应的方式准确捕捉自动开锁器从启动工作到开锁释放的动作时间。对比原来的声控测试方法,本发明不仅实现了自动开锁器在模拟高度负压环境中完成上锁和开锁的功能,而且能准确测出动作时间,彻底解决了原来通过声电感应的方式来监测自动开锁器的齿轮启动声音,以此来判断自动开锁器启动工作的时间起点,导致动作时间测量不准确的问题。(The invention belongs to the testing technology of aviation lifesaving instruments, and relates to a device and a method for detecting the action time of an automatic unlocking device. The invention uses the soft locking needle to replace a high-altitude diaphragm capsule to accurately lock the lever position when the automatic unlocking device reaches the preset unlocking height under the negative pressure state corresponding to the simulation height, and accurately captures the action time from starting to unlocking and releasing of the automatic unlocking device in a photoelectric sensing mode after the environment where the automatic unlocking device is located recovers to the local air pressure. Compared with the original sound control test method, the invention not only realizes the function that the automatic unlocking device completes locking and unlocking in the simulated high negative pressure environment, but also can accurately measure the action time, and thoroughly solves the problem that the action time measurement is inaccurate because the gear starting sound of the automatic unlocking device is monitored in an acoustic-electric induction mode in the prior art so as to judge the starting time of the starting work of the automatic unlocking device.)

1. The utility model provides a detect automatic device of locker action time which characterized in that: comprises a test box, a soft lock pin plugging device, a steel cable locking device and a tester;

the test box comprises a box body (1), a cover (2) and an automatic unlocking device (3), wherein the cover (2) covers the box body (1) to form a sealed cavity, and the automatic unlocking device (3) is arranged in the box body (1);

the soft lock needle plugging device is arranged in the box body (1) and comprises a soft lock needle (4), a photoelectric switch I (6) and a telescopic structure I, wherein the telescopic structure I comprises a power structure I and a telescopic pull rod I, the power structure I drives the telescopic pull rod I to move up and down, the telescopic pull rod I is connected with the soft lock needle (4), and the soft lock needle (4) can be inserted into and pulled out of the automatic unlocking device (3); the first photoelectric switch (6) is arranged in the box body (1) and is positioned on the outer side of the first telescopic pull rod, the first photoelectric switch (6) senses the movement of the first telescopic pull rod along with the up-and-down movement of the first telescopic pull rod, the movement of the soft lock needle (4) is sensed through the movement of the first telescopic pull rod, and the first photoelectric switch (6) converts a movement signal of the soft lock needle (4) into an electric signal for a tester to resolve;

the steel cable locking device is arranged in the box body (1) and comprises a photoelectric switch II (8) and a telescopic structure II, the telescopic structure II comprises a power structure II and a telescopic pull rod II, the power structure II drives the telescopic pull rod II to move up and down, the telescopic pull rod II is connected with a hook (14) of the automatic unlocking device (3) and can pull out a steel cable (13) of the automatic unlocking device (3) for a certain stroke, so that the automatic unlocking device (3) is locked and stores unlocking power; the second photoelectric switch (8) is arranged in the box body (1) and is positioned on the outer side of the second telescopic pull rod, the second photoelectric switch (8) induces the second telescopic pull rod to move along with the up-down movement of the second telescopic pull rod, the movement of the steel cable (13) is induced through the movement of the second telescopic pull rod, and the second photoelectric switch (6) converts a moving signal of the steel cable (13) into an electric signal for the tester to resolve;

the tester is connected with the first photoelectric switch (6) and the second photoelectric switch (8), the unlocking time of the automatic unlocking device (3) is calculated by resolving electric signals output by the first photoelectric switch (6) and the second photoelectric switch (8), and meanwhile, the tester is connected with the box body (1), measures the air pressure in the box body and displays a corresponding height value.

2. The apparatus for detecting the actuation time of an automatic lock opener according to claim 1, wherein: the cover (2) is a glass cover, so that the action conditions of all parts in the box body can be observed conveniently.

3. The apparatus for detecting the actuation time of an automatic lock opener according to claim 1, wherein: the first power structure of the first telescopic structure is a small air cylinder (7), the small air cylinder (7) is connected with an external compressed air source, the first telescopic pull rod is a small air cylinder pull rod (5), the small air cylinder pull rod (5) is connected with a soft lock needle (4), and the soft lock needle (4) can be inserted into and pulled out of the automatic unlocking device (3).

4. The apparatus for detecting the actuation time of an automatic lock opener according to claim 1, wherein: the second power structure of the second telescopic structure is a large air cylinder (9), the large air cylinder (9) is connected with an external compressed air source, the second telescopic pull rod is a large air cylinder pull rod (15), the large air cylinder pull rod (15) is connected with a hook (14) of the automatic unlocking device (3), and a steel cable (13) of the automatic unlocking device (3) can be pulled out for a certain stroke, so that the automatic unlocking device (3) is locked and stores unlocking power.

5. The apparatus for detecting the actuation time of an automatic lock opener according to claim 1, wherein: the tester is connected with the first photoelectric switch (6) and the second photoelectric switch (8) through wires, is connected with the box body (1) through an air pipe, measures air pressure in the box body and displays a corresponding height value.

6. The apparatus for detecting the actuation time of an automatic lock opener according to claim 1, wherein: the vacuum gas source box is characterized in that a first gas circuit communicated with the outside is arranged on the box body (1), a valve is arranged on the first gas circuit and used for controlling the opening and closing of the first gas circuit, a second gas circuit communicated with a vacuum gas source is arranged on the box body (1), and a valve is arranged on the second gas circuit and used for controlling the opening and closing of the second gas circuit.

7. The method for detecting the actuation time of an automatic lock opener according to any one of claims 1 to 6, characterized in that: the method comprises the following steps:

a) adjusting a height dial of the automatic unlocking device (3) and aligning the scale mark of the preset height with the height pointer;

b) the automatic unlocking device (3) is arranged in the box body (1);

c) the hook (14) is connected with the second telescopic pull rod;

d) the soft lock needle (4) is inserted into the automatic unlocking device (3) through the telescopic structure I;

e) the steel lock (13) is pulled out through the second telescopic structure to lock the automatic unlocking device (3);

f) the box body (1) is covered by a cover (2);

g) the air pressure in the box body (1) is reduced by air suction of a vacuum air source, the air pressure value in the box body (1) is detected by a tester, when the air pressure value in the box body (1) is higher than the preset height value of the automatic unlocking device (3) by more than 500m, the air suction is closed, a height diaphragm capsule (10) on the automatic unlocking device (3) is in an expansion state, and a brake rod (11) of the automatic unlocking device (3) is extended;

h) the soft lock needle (4) is pulled out of the automatic unlocking device (3) through the first telescopic structure, the time delay mechanism of the automatic unlocking device (3) starts to work, and the lever (12) of the automatic unlocking device (3) rotates anticlockwise;

i) when the lever (12) rotates to contact the brake lever (11), the time delay mechanism of the automatic unlocking device (3) stops working, and at the moment, the soft locking needle (4) is inserted into the automatic unlocking device (3) again through the first telescopic structure;

j) opening a valve of a first air passage on the box body (1), starting air inlet, restoring the air pressure in the box body (1) to the local atmospheric pressure, and opening the cover (2);

k) the soft lock needle (4) is pulled out of the automatic unlocking device (3) through the telescopic structure I, the time delay mechanism of the automatic unlocking device (3) starts to work again, and the steel cable (13) is retracted after the work is finished;

l) the tester displays the time from the restart of the automatic unlocking device (3) time delay mechanism to the withdrawal of the steel cable (13), namely the action time of the automatic unlocking device (3).

8. The detection method according to claim 7, characterized in that: and g) when the air pressure height in the box body (1) is 500-1300 m higher than the preset height value of the automatic unlocking device (3), closing air extraction.

Technical Field

The invention belongs to the technical field of testing of aviation lifesaving instruments, and relates to a device and a method for detecting the action time of an automatic unlocking device.

Background

The automatic unlocking device is an aviation lifesaving device which determines the lifesaving unlocking time according to the flying height. It can only play the unlocking lifesaving function after the height control mechanism and the time delay mechanism release the control of the locking state.

The action time refers to the delay time from the unlocking of the automatic unlocking device to the completion of the unlocking of the automatic unlocking device when the height diaphragm capsule releases the locking of the delay mechanism after the automatic unlocking device reaches the preset unlocking height.

The action time is determined according to the process specification, the requirement is satisfied with (1 +/-0.2) s, and the accuracy of the action time has direct influence on the life-saving safety. During measurement, the automatic unlocking device must be in a low-pressure environment corresponding to a preset height, the height diaphragm capsule and the delay mechanism are both in the sealed cavity of the automatic unlocking device, and the moving signals of the height diaphragm capsule and the delay mechanism cannot be directly observed from the outside, so that the starting signal of the automatic unlocking device must be captured by a voice-operated switch.

The conventional measurement method is as follows: simulating high-altitude parachute jumping, when the ambient air pressure rises to the air pressure corresponding to the preset unlocking height, releasing the locking of the delay mechanism by the height mechanism of the automatic unlocking device, sensing the starting sound of the delay mechanism of the automatic unlocking device by the sound control switch to capture the timing starting point, sensing the optical signal of the contraction of the steel cable of the automatic unlocking device by the photoelectric switch to capture the timing end point, and calculating the delay time from the timing starting point to the end point, namely the actually measured action time.

The above measurement method has the following disadvantages: the induction sensitivity of the sound control switch is difficult to accurately capture the starting sound of the automatic unlocking device, and is easy to be interfered by external environment noise, so that the result is that the measurement result of the same product on the action time is unstable, the average change range of the product reaches 0.2 s-0.5 s, the ratio of the average change range to the tolerance (0.4s) is 50-125%, and the production and delivery are difficult.

The method for measuring the action time is improved, and the problem of inaccurate measurement is solved, which is a necessary way for ensuring the safety of aviation lifesaving.

Disclosure of Invention

The purpose of the invention is: the device and the method for detecting the action time of the automatic unlocking device solve the problem of inaccurate measurement of the traditional method.

The technical scheme of the invention is as follows:

a device for detecting the action time of an automatic unlocking device comprises a test box, a soft lock pin plugging device, a steel cable locking device and a tester;

the test box comprises a box body (1), a cover (2) and an automatic unlocking device (3), wherein the cover (2) covers the box body (1) to form a sealed cavity, and the automatic unlocking device (3) is arranged in the box body (1);

the soft lock needle plugging device is arranged in the box body (1) and comprises a soft lock needle (4), a photoelectric switch I (6) and a telescopic structure I, wherein the telescopic structure I comprises a power structure I and a telescopic pull rod I, the power structure I drives the telescopic pull rod I to move up and down, the telescopic pull rod I is connected with the soft lock needle (4), and the soft lock needle (4) can be inserted into and pulled out of the automatic unlocking device (3); the first photoelectric switch (6) is arranged in the box body (1) and is positioned on the outer side of the first telescopic pull rod, the first photoelectric switch (6) senses the movement of the first telescopic pull rod along with the up-and-down movement of the first telescopic pull rod, the movement of the soft lock needle (4) is sensed through the movement of the first telescopic pull rod, and the first photoelectric switch (6) converts a movement signal of the soft lock needle (4) into an electric signal for a tester to resolve;

the steel cable locking device is arranged in the box body (1) and comprises a photoelectric switch II (8) and a telescopic structure II, the telescopic structure II comprises a power structure II and a telescopic pull rod II, the power structure II drives the telescopic pull rod II to move up and down, the telescopic pull rod II is connected with a hook (14) of the automatic unlocking device (3) and can pull out a steel cable (13) of the automatic unlocking device (3) for a certain stroke, so that the automatic unlocking device (3) is locked and stores unlocking power; the second photoelectric switch (8) is arranged in the box body (1) and is positioned on the outer side of the second telescopic pull rod, the second photoelectric switch (8) induces the second telescopic pull rod to move along with the up-down movement of the second telescopic pull rod, the movement of the steel cable (13) is induced through the movement of the second telescopic pull rod, and the second photoelectric switch (6) converts a moving signal of the steel cable (13) into an electric signal for the tester to resolve;

the tester is connected with the first photoelectric switch (6) and the second photoelectric switch (8), the unlocking time of the automatic unlocking device (3) is calculated by resolving electric signals output by the first photoelectric switch (6) and the second photoelectric switch (8), and meanwhile, the tester is connected with the box body (1), measures the air pressure in the box body and displays a corresponding height value.

Furthermore, the cover (2) is a glass cover, so that the action conditions of all parts in the box body can be observed conveniently.

Furthermore, the first power structure of the first telescopic structure is a small air cylinder (7), the small air cylinder (7) is connected with an external compressed air source, the first telescopic pull rod is a small air cylinder pull rod (5), the small air cylinder pull rod (5) is connected with the soft lock needle (4), and the soft lock needle (4) can be inserted into and pulled out of the automatic unlocking device (3).

Furthermore, the power structure II of the telescopic structure II is a large air cylinder (9), the large air cylinder (9) is connected with an external compressed air source, the telescopic pull rod II is a large air cylinder pull rod (15), the large air cylinder pull rod (15) is connected with a hook (14) of the automatic unlocking device (3), and a steel cable (13) of the automatic unlocking device (3) can be pulled out for a certain stroke, so that the automatic unlocking device (3) is locked and stores unlocking power.

Furthermore, the tester is connected with the first photoelectric switch (6) and the second photoelectric switch (8) through wires, and the tester is connected with the box body (1) through an air pipe, measures the air pressure in the box body and displays a corresponding height value.

Further, the box body (1) is provided with a first air path communicated with the outside, the first air path is provided with a valve for controlling the opening and closing of the first air path, the box body (1) is provided with a second air path communicated with a vacuum air source, and the second air path is provided with a valve for controlling the opening and closing of the second air path.

The detection method of the device for detecting the action time of the automatic unlocking device comprises the following steps:

a) adjusting a height dial of the automatic unlocking device (3) and aligning the scale mark of the preset height with the height pointer;

b) the automatic unlocking device (3) is arranged in the box body (1);

c) the hook (14) is connected with the second telescopic pull rod;

d) the soft lock needle (4) is inserted into the automatic unlocking device (3) through the telescopic structure I;

e) the steel lock (13) is pulled out through the second telescopic structure to lock the automatic unlocking device (3);

f) the box body (1) is covered by a cover (2);

g) the air pressure in the box body (1) is reduced by air suction of a vacuum air source, the air pressure value in the box body (1) is detected by a tester, when the air pressure value in the box body (1) is higher than the preset height value of the automatic unlocking device (3) by more than 500m, the air suction is closed, a height diaphragm capsule (10) on the automatic unlocking device (3) is in an expansion state, and a brake rod (11) of the automatic unlocking device (3) is extended;

h) the soft lock needle (4) is pulled out of the automatic unlocking device (3) through the first telescopic structure, the time delay mechanism of the automatic unlocking device (3) starts to work, and the lever (12) of the automatic unlocking device (3) rotates anticlockwise;

i) when the lever (12) rotates to contact the brake lever (11), the time delay mechanism of the automatic unlocking device (3) stops working, and at the moment, the soft locking needle (4) is inserted into the automatic unlocking device (3) again through the first telescopic structure;

j) opening a valve of a first air passage on the box body (1), starting air inlet, restoring the air pressure in the box body (1) to the local atmospheric pressure, and opening the cover (2);

k) the soft lock needle (4) is pulled out of the automatic unlocking device (3) through the telescopic structure I, the time delay mechanism of the automatic unlocking device (3) starts to work again, and the steel cable (13) is retracted after the work is finished;

l) the tester displays the time from the restart of the automatic unlocking device (3) time delay mechanism to the withdrawal of the steel cable (13), namely the action time of the automatic unlocking device (3).

Further, when the air pressure height in the box body (1) in the step g) is 500-1300 m higher than the preset height value of the automatic unlocking device (3), the air suction is closed.

The invention has the advantages and beneficial effects that:

(1) according to the invention, the soft lock pin plugging and unplugging device and the steel cable locking device are arranged in the test box, so that the automatic unlocking device locks the locking position of the height mechanism by plugging the soft lock pin in the negative pressure environment, after the height mechanism releases the locking, the soft lock pin is sensed to be unplugged by the photoelectric switch, the starting sound of the sound control induction automatic unlocking device is skillfully converted into the starting optical signal of the photoelectric induction automatic unlocking device, the accuracy of capturing the starting time of the automatic unlocking device is obviously improved, and the aim of accurately measuring the action time is achieved, after the automatic unlocking device is used, the average change range of the action time measured by the automatic unlocking device is reduced to be below 0.15s from the past 0.2-0.5 s, and the measurement accuracy is improved to be 100% from 50%; (2) the voice-operated switch captures a starting signal of action time under a negative pressure condition, the photoelectric switch can be completed under normal pressure, the operation is simple and convenient, and after the voice-operated switch is used, the installation and adjustment period is shortened by 30%; (3) the invention is not interfered by external noise.

Drawings

Fig. 1 is a schematic diagram of measuring an operation time of an automatic lock opener.

Wherein 1: a box body; 2: a glass cover; 3: an automatic unlocking device; 4: a soft locking needle; 5: a small cylinder rod; 6: a first photoelectric switch; 7: a small cylinder; 8: a photoelectric switch II; 9: a large cylinder; 10: a high-altitude bellows; 11: a brake lever; 12: a lever; 13: a steel cord; 14: hooking; 15: a large cylinder pull rod.

Detailed Description

The following detailed description of the embodiments of the present invention, such as the shapes, configurations, mutual positions and connection relationships of the components, the functions and operating principles of the components, the manufacturing processes and the operation and use methods thereof, will be further described in detail with reference to the accompanying drawings, so as to help those skilled in the art to more completely, accurately and deeply understand the concept and technical solutions of the present invention:

the first embodiment is as follows:

as shown in fig. 1, a device for detecting the action time of an automatic lock opener comprises a test box, a soft lock pin plugging device, a steel cable locking device and a tester;

the test box comprises a box body 1, a cover 2 and an automatic lock opener 3, wherein the cover 2 covers the box body 1 to form a sealed cavity, and the automatic lock opener 3 is arranged in the box body 1; the cover 2 is a glass cover, so that the action conditions of all parts in the box body 1 can be observed conveniently;

the soft lock needle inserting and pulling device is arranged in the box body 1 and comprises a soft lock needle 4, a photoelectric switch I6 and a telescopic structure I, wherein the telescopic structure I comprises a power structure I and a telescopic pull rod I, the power structure I drives the telescopic pull rod I to move up and down, and the telescopic pull rod I is connected with the soft lock needle 4 and can insert and pull the soft lock needle 4 into and out of the automatic unlocking device 3; the first photoelectric switch 6 is arranged in the box body 1 and is positioned on the outer side of the first telescopic pull rod, the first photoelectric switch 6 induces the first telescopic pull rod to move along with the up-and-down movement of the first telescopic pull rod, the movement of the soft lock needle 4 is induced through the movement of the first telescopic pull rod, and the first photoelectric switch 6 converts a moving signal of the soft lock needle 4 into an electric signal for a tester to resolve;

referring to fig. 1, the first power structure of the first telescopic structure is a small cylinder 7, the small cylinder 7 is connected with an external compressed air source, the first telescopic pull rod is a small cylinder pull rod 5, the small cylinder pull rod 5 is connected with a soft lock needle 4, and the soft lock needle 4 can be inserted into and pulled out of the automatic unlocking device 3.

The steel cable locking device is arranged in the box body 1 and comprises a photoelectric switch II 8 and a telescopic structure II, the telescopic structure II comprises a power structure II and a telescopic pull rod II, the power structure II drives the telescopic pull rod II to move up and down, the telescopic pull rod II is connected with a hook 14 of the automatic unlocking device 3 and can pull out a steel cable 13 of the automatic unlocking device 3 for a certain stroke, so that the automatic unlocking device 3 is locked and stores unlocking power; the second photoelectric switch 8 is arranged in the box body 1 and is positioned on the outer side of the second telescopic pull rod, the second photoelectric switch 8 induces the second telescopic pull rod to move along with the up-and-down movement of the second telescopic pull rod, the movement of the steel cable 13 is induced through the movement of the second telescopic pull rod, and the second photoelectric switch 6 converts a moving signal of the steel cable 13 into an electric signal for the tester to resolve;

as shown in fig. 1, the second power structure of the second telescopic structure is a large cylinder 9, the large cylinder 9 is connected with an external compressed air source, the second telescopic pull rod is a large cylinder pull rod 15, the large cylinder pull rod 15 is connected with a hook 14 of the automatic unlocking device 3, and the steel cable 13 of the automatic unlocking device 3 can be pulled out for a certain stroke, so that the automatic unlocking device 3 is locked and stores unlocking power.

The tester is connected with the first photoelectric switch 6 and the second photoelectric switch 8, the tester calculates the unlocking time of the automatic unlocking device 3 by resolving electric signals output by the first photoelectric switch 6 and the second photoelectric switch 8, and meanwhile, the tester is connected with the box body 1, measures the air pressure in the box body and displays the corresponding height value.

The tester is connected with the first photoelectric switch 6 and the second photoelectric switch 8 through wires, is connected with the box body 1 through an air pipe, measures air pressure in the box body and displays a corresponding height value.

In addition, the box body 1 is provided with a first air path communicated with the outside, the first air path is provided with a valve for controlling the opening and closing of the first air path, the box body 1 is provided with a second air path communicated with a vacuum air source, and the second air path is provided with a valve for controlling the opening and closing of the second air path.

Example two:

a device for detecting the action time of an automatic unlocking device comprises a test box, a soft lock pin plugging device, a steel cable locking device and a tester. The testing box comprises a box body 1 and a glass cover 2, the glass cover 2 covers the box body 1 to form a sealed cavity, and the automatic unlocking device 3 is installed in the box body 1.

The soft lock needle inserting and pulling device is arranged in the box body 1 and comprises a soft lock needle 4, a photoelectric switch 6 and a small air cylinder 7, wherein the small air cylinder 7 is connected with an external compressed air source, a small air cylinder pull rod 5 of the small air cylinder is connected with the soft lock needle 4, and the soft lock needle 4 can be inserted into and pulled out of the automatic unlocking device 3; the photoelectric switch 6 is arranged in the box body 1 and is positioned on a moving path of the small cylinder pull rod 5, and can convert a moving signal of the soft lock pin 4 into an electric signal through photoelectric induction for a tester to resolve.

The steel cable locking device is arranged in the box body 1 and comprises a photoelectric switch 8 and a big cylinder 9. The large cylinder 9 is connected with an external compressed air source, a large cylinder pull rod 15 of the large cylinder is connected with a hook 14 of the automatic lock opener 3, and a steel cable 13 of the automatic lock opener 3 can be pulled out for a certain stroke, so that the automatic lock opener 3 is locked and stores unlocking power; the photoelectric switch 8 is arranged in the box body 1 and on the moving path of the large cylinder pull rod 15, and can convert the moving signal of the steel cable 13 into an electric signal for the tester to resolve through photoelectric induction.

The tester is connected with the photoelectric switch 6 and the photoelectric switch 8 through wires and connected with the box body 1 through an air pipe, the tester calculates the unlocking time of the automatic unlocking device 3 by resolving electric signals output by the photoelectric switch 6 and the photoelectric switch 8, and meanwhile, the tester can measure the air pressure in the test box and display the corresponding height value.

EXAMPLE III

The detection method of the device for detecting the action time of the automatic unlocking device comprises the following steps:

a) adjusting a height dial of the automatic unlocking device 3, and aligning the scale mark with the preset height with the height pointer;

b) placing the automatic unlocking device 3 in the box body 1;

c) the hook 14 and the second telescopic pull rod are connected;

d) inserting the soft lock needle 4 into the automatic unlocking device 3 through the telescopic structure I;

e) the steel lock 13 is pulled out through the telescopic structure II to lock the automatic unlocking device 3;

f) the box body 1 is covered by a cover 2;

g) the air pressure in the box body 1 is reduced by air suction of a vacuum air source, the air pressure value in the box body 1 is detected by a tester, when the air pressure value in the box body 1 is higher than the preset height value of the automatic unlocking device 3 by more than 500m, the air suction is closed, the height diaphragm capsule 10 on the automatic unlocking device 3 is in an expansion state, and the brake rod 11 of the automatic unlocking device 3 is extended;

h) the flexible locking needle 4 is pulled out of the automatic unlocking device 3 through the first telescopic structure, the time delay mechanism of the automatic unlocking device 3 starts to work, and the lever 12 of the automatic unlocking device 3 rotates anticlockwise;

i) when the lever 12 rotates to contact the brake lever 11, the time delay mechanism of the automatic unlocking device 3 stops working, and at the moment, the soft locking needle (4) is inserted into the automatic unlocking device 3 again through the first telescopic structure;

j) opening a valve of a first air passage on the box body 1, starting air inlet, restoring the air pressure in the box body 1 to the local atmospheric pressure, and opening the cover 2;

k) the flexible lock needle 4 is pulled out of the automatic unlocking device 3 through the telescopic structure I, the time delay mechanism of the automatic unlocking device 3 starts to work again, and the steel cable 13 is retracted after the work is finished;

l) the tester displays the time from the time when the delay mechanism of the automatic lock opener 3 restarts working to the time when the steel cable 13 is retracted, namely the action time of the automatic lock opener 3.

Further, when the air pressure height in the box body 1 in the step g) is 500-1300 m higher than the preset height value of the automatic unlocking device 3, the air suction is closed.

The invention installs the soft lock pin plugging device and the steel cable locking device in the test box, so that the automatic unlocking device locks the locking position of the height mechanism by plugging the soft lock pin 4 in the negative pressure environment, after the height mechanism releases the locking, the soft lock pin 4 is pulled out by the photoelectric switch I and II, the starting sound of the acoustic control induction automatic unlocking device is skillfully converted into the starting light signal of the photoelectric induction automatic unlocking device, the accuracy of capturing the starting time of the automatic unlocking device is obviously improved, and the aim of accurately measuring the action time is achieved, after the invention is used, the average change range of the action time measured by the automatic unlocking device is reduced to be below 0.15s from the past 0.2 s-0.5 s, and the measurement accuracy is improved to 100% from 50%; the voice-operated switch captures a starting signal of action time under a negative pressure condition, the photoelectric switch can be completed under normal pressure, the operation is simple and convenient, and after the voice-operated switch is used, the installation and adjustment period is shortened by 30%; the invention is not interfered by external noise.

The invention has been described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the specific implementation in the above-described manner, and it is within the scope of the invention to apply the inventive concept and solution to other applications without substantial modification.