CN111470050B - Starting structure and starting method of position reporting device - Google Patents
Starting structure and starting method of position reporting device Download PDFInfo
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- CN111470050B CN111470050B CN202010149746.4A CN202010149746A CN111470050B CN 111470050 B CN111470050 B CN 111470050B CN 202010149746 A CN202010149746 A CN 202010149746A CN 111470050 B CN111470050 B CN 111470050B
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000006698 induction Effects 0.000 claims abstract description 6
- 239000004020 conductor Substances 0.000 claims abstract description 4
- 230000002159 abnormal effect Effects 0.000 claims description 18
- 229920001971 elastomer Polymers 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 238000004804 winding Methods 0.000 description 3
- 239000000806 elastomer Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D25/00—Emergency apparatus or devices, not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D17/00—Parachutes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
- Emergency Alarm Devices (AREA)
Abstract
The invention discloses a starting structure and a starting method of a position reporting device, wherein the starting structure comprises the position reporting device, an umbrella band operating band, an upper connecting band, an upper buckle, a lower connecting band, a pull pin and a sensing switch; the sensing switch is arranged at the upper end of the position reporting device, the shell, the inner cavity and the three-axis 60-degree strain rosette are made of magnetic conductors, and a magnetic induction circuit is arranged at the position, right below the inner cavity, of the main control board card of the position reporting device; the starting structure and the starting method have high reliability, and the probability of mistaken starting of the position reporting device is reduced.
Description
Technical Field
The invention relates to the technical field of control of a position reporting device after a pilot is in danger on the sea, in particular to a starting structure and a starting method of the position reporting device.
Background
When a pilot is in danger in the air, the pilot hopes that a position reporting device carried by the pilot is started up for reporting the position at the first time. The conditions of starting the position reporting device in the prior art comprise overload, air pressure, temperature, parachute opening force and the like, and a novel practical patent (patent number: 201721666508.0, published: 2018.09.18) discloses a mechanical tension starting device of life-saving wearable equipment, which is started based on the parachute opening force, but the starting of the position reporting device in the prior art has the problem of low reliability, and the following problems exist in the above patents: (1) when the pilot normally moves in the cockpit, the pin is pulled or pulled by mistake, and when the ground crew maintains the equipment, the pin is pulled or pulled by mistake, so that the position reporting device is started by mistake; (2) after the pulling pin is used for a long time, the pulling force response range changes, if the pulling pin is reduced, the probability of the error starting of the position reporting device is increased, and if the pulling pin is increased, the pulling pin cannot be opened; (3) the surface of the pulling pin is corroded or oxidized after long-term use, the contact conductivity is poor, and the error start of the position reporting device can be caused.
Accordingly, the invention is particularly directed to.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a starting structure of a position reporting device, and based on the structure, the invention also provides a starting method of the position reporting device based on temperature and a starting method of the position reporting device based on parachute opening force.
The technical scheme of the invention is realized as follows:
a start-up structure of a position reporting device comprises the position reporting device, an umbrella band operating band, an upper connecting band, an upper buckle, a lower connecting band, a pull pin and a sensing switch;
the upper end of the upper connecting belt is fixedly connected with the umbrella belt operating belt, the upper end of the upper buckle is fixedly connected with the lower end of the upper connecting belt, the upper buckle and the lower buckle are clamped together, the clamping force of the upper buckle and the lower buckle is greater than the upper threshold value limit of the umbrella opening force, the upper end of the lower connecting belt is fixedly connected with the lower end of the lower buckle, and the upper end of the pull pin is fixedly connected with the lower end of the lower connecting belt;
the sensing switch is arranged at the upper end of the position reporting device and comprises a shell, an inner cavity and a three-axis 60-degree strain gage, the upper end of the shell extends downwards to form the inner cavity, the lower end of a pulling pin is inserted in the inner cavity, the force of inserting the pulling pin is greater than the lower threshold value limit of the parachute opening force and smaller than the upper threshold value limit of the parachute opening force, the bottom of the inner cavity is made of an elastic body made of a rubber material, strain gauges of the three-axis 60-degree strain gage are temperature sensing strain gauges which are respectively bonded on the left side, the right side and the bottom of the outer wall of the bottom of the inner cavity, the three temperature sensing strain gauges are electrically connected with a main control board card of the position reporting device, and the position reporting device acquires a force value and a temperature value measured by the temperature sensing strain gauges;
the pulling pin is made of a magnetic conductor, and a magnetic induction circuit is arranged at the position, right below the inner cavity, of the main control board card of the position reporting device; at least three air pressure height sensors are installed in the position reporting device and are electrically connected with a main control board card of the position reporting device, and the position reporting device acquires a height value measured by the air pressure height sensors.
The invention discloses a temperature-based bit reporting device starting method, which uses the bit reporting device starting structure provided by the invention, and comprises the following steps:
step 1: acquiring temperature values Tt1, Tt2 and Tt3 measured by the three temperature-sensitive strain gauges, and taking an average value Tt after eliminating abnormal values;
step 2: judging whether Tt is greater than a temperature limit value T0, if so, entering a step 3, otherwise, returning to the step 1;
and step 3: judging whether the count X is larger than a count limit value X0, if so, entering a step 6, otherwise, adding 1 to the X, and entering a step 4;
and 4, step 4: acquiring force values Nt1, Nt2 and Nt3 measured by three temperature sensing strain gauges, and calculating an average scalar value | Nt |;
and 5: judging whether the | Nt | is greater than 0, judging whether the | Nt | is less than a threshold lower limit | N0min | of the parachute opening force, if any one of the | Nt | and the | N0min | is greater than the threshold lower limit, entering the step 6, and if both are not greater than the threshold lower limit, returning to the step 1;
step 6: the position reporting device is started and reports the position.
Further, in step 2, height values Ht1, Ht2, Ht3 measured by the three barometric altitude sensors are obtained, an average value Ht is taken after abnormal values are removed, and T0 is T0 of the current Ht.
The invention discloses a position reporting device starting method based on parachute opening force, which uses the position reporting device starting structure provided by the invention, and comprises the following steps:
step 1: judging whether the pulling pin is pulled open or not, if so, entering a step 2, and if not, entering a step 8;
step 2: acquiring temperature values Tt1, Tt2 and Tt3 measured by the three temperature-sensitive strain gauges, and taking an average value Tt after eliminating abnormal values;
and step 3: judging whether Tt is greater than a temperature limit value T0, if so, entering a step 4, otherwise, entering a step 5;
and 4, step 4: starting the position reporting device and reporting the position;
and 5: judging whether the maximum value | Nmax | of the force when the pulling pin is not pulled out is larger than the lower limit | N0min | of the threshold value of the parachute opening force, if so, entering a step 6, and if not, entering a step 7;
step 6: marking the Nmax as a fault value, and returning to the step 1;
and 7: making | N0min | ═ Nmax |, and returning to step 1;
and 8: acquiring force values Nt1, Nt2 and Nt3 measured by three temperature sensing strain gauges, and calculating an average scalar value | Nt |;
and step 9: if the | Nt | is larger than the maximum value | Nmax | of the force when the pulling pin is not pulled out, the | Nmax | is made to be | Nt |, and the step 1 is returned; and if the | Nt | is smaller than the minimum | Nmin | of the force when the pulling pin is not pulled out, making the | Nmin | equal to the | Nt | and returning to the step 1.
Further, in step 3, height values Ht1, Ht2, Ht3 measured by the three barometric altitude sensors are obtained, an average value Ht is taken after abnormal values are removed, and T0 is T0 of the current Ht.
The invention has the beneficial effects that: the three aspects of height, temperature and power of opening umbrella are combined to complete the start of the position reporting device, so that the reliability is improved, and the probability of mistaken start of the position reporting device is reduced.
Drawings
FIG. 1 is a block diagram of a boot architecture;
fig. 2 is a sectional view of the sensor switch.
In the figure: 1-position reporting device, 2-umbrella band operating band, 3-upper connecting band, 4-upper buckle, 5-lower buckle, 6-lower connecting band, 7-pulling pin, 8-sensing switch, 9-shell, 10-inner cavity, 11-bottom of inner cavity, 12-strain gauge, 13-main control board card.
Detailed Description
In order to make the technical solutions of the present invention better understood, the following description of the technical solutions of the present invention with reference to the accompanying drawings of the present invention is made clearly and completely, and other similar embodiments obtained by a person of ordinary skill in the art without any creative effort based on the embodiments in the present application shall fall within the protection scope of the present application.
The first embodiment is as follows:
a starting structure of a position reporting device 1 is shown in figure 1, and comprises the position reporting device 1, an umbrella band operating band 2, an upper connecting band 3, an upper buckle 4, a lower buckle 5, a lower connecting band 6, a pull pin 7 and a sensing switch 8.
Go up 3 upper ends of connecting band and operate area 2 in the umbrella area through making up fixed connection, go up 4 upper ends of buckle through winding fixed connection in 3 lower extremes of upper connecting band, go up buckle 4 and 5 joints of lower buckle together, the power of going up buckle 4 and 5 joints of lower buckle is greater than the upper limit of threshold value of power of opening (the umbrella can give the upper limit and the lower limit of the threshold value of power of opening when dispatching from the factory, power of opening is usually in the within range of threshold value during the opening of umbrella), 6 upper ends of lower connecting band are through winding fixed connection in 5 lower extremes of lower buckle, the upper end of pull pin 7 is through winding fixed connection in 6 lower extremes of lower connecting band. Go up buckle 4 and buckle 5 link together down during pilot's flight, in this embodiment, the power of going up buckle 4 and buckle 5 joint down is greater than ten times of the threshold value upper limit of parachute opening power, and the parachute opening power is too big when preventing to open the parachute to drag buckle 4 and buckle 5 down open, and when the pilot did not fly, will go up buckle 4 and buckle 5 down and untie, drag or pull by mistake and pull out pin 7 and lead to reporting 1 mistake start of device during preventing ground service personnel maintenance equipment.
As shown in fig. 2, the sensing switch 8 is installed at the upper end of the position reporting device 1, the sensing switch 8 includes a housing 9, an inner cavity 10 and a triaxial 60-degree strain gauge, the upper end of the housing 9 extends downward to form the inner cavity 10, the lower end of the pull pin 7 is inserted into the inner cavity 10, the force of the insertion of the pull pin 7 is greater than the lower threshold value of the opening force and less than the upper threshold value of the opening force, the bottom 11 of the inner cavity is made of an elastomer of a rubber material, the strain gauge 12 of the triaxial 60-degree strain gauge is a temperature sensing strain gauge 12, the three temperature sensing strain gauges 12 are respectively bonded at the left side, the right side and the bottom of the outer wall at the bottom of the inner cavity 10, the three temperature sensing strain gauges 12 are electrically connected with a main control board 13 of the position reporting device 1, and the position reporting device 1 obtains the force value and the temperature value measured by the temperature sensing strain gauges. When the pulling pin 7 is in the inner cavity 10, the stress of the pulling pin is transferred to the strain gauge 12 through the bottom of the inner cavity 10 made of the elastomer of the rubber material, and on the other hand, the force of the plugging of the pulling pin 7 is larger than the lower threshold value limit of the parachute opening force and smaller than the upper threshold value limit of the parachute opening force, so that the pulling pin 7 is prevented from being pulled out by other forces.
The pulling pin 7 is made of a magnetic conductor, a magnetic induction circuit is arranged at a position, right below the inner cavity 10, of the main control board card 13 of the position reporting device 1, a distance threshold value is set, when the distance between the pulling pin 7 and the magnetic induction circuit is smaller than the distance threshold value, the pulling pin 7 is judged not to be pulled out, and when the distance between the pulling pin 7 and the magnetic induction circuit is larger than or equal to the distance threshold value, the pulling pin 7 is judged to be pulled out; at least three air pressure height sensors are installed in the position reporting device 1 and are electrically connected with a main control board card 13 of the position reporting device 1, and the position reporting device 1 acquires a height value measured by the air pressure height sensors.
Example two:
a temperature-based bit reporting device starting method is based on a starting mechanism of the first embodiment and comprises the following steps:
step 1: acquiring temperature values Tt1, Tt2 and Tt3 measured by the three temperature-sensitive strain gauges, and taking an average value Tt after eliminating abnormal values; the present embodiment employs the steps of removing abnormal values, determining whether Tt1 is greater than 2 times the average value of Tt2 and Tt3, determining Tt1 as abnormal data and removing it if so, determining T2 as greater than 2 times the average value of Tt1 and Tt3, determining Tt2 as abnormal data and removing it if so, determining Tt3 as greater than 2 times the average value of Tt1 and Tt2, determining Tt3 as abnormal data and removing it if so.
Step 2: judging whether Tt is greater than a temperature limit value T0, if so, entering a step 3, otherwise, returning to the step 1; in the step, height values Ht1, Ht2 and Ht3 measured by three barometric altitude sensors are obtained, an average value Ht is obtained after abnormal values are removed, the removing method is the same as the method for removing the temperature abnormal values in the step 1, T0 is T0 of the current Ht, and T0 corresponding to different Hts is obtained through pre-experimental measurement.
And step 3: judging whether the count X is larger than a count limit value X0, if so, entering a step 6, otherwise, adding 1 to the X, and entering a step 4; and 4, step 4: acquiring force values Nt1, Nt2 and Nt3 measured by three temperature sensing strain gauges, and calculating an average scalar value | Nt |; and 5: judging whether the | Nt | is greater than 0, judging whether the | Nt | is less than a threshold lower limit | N0min | of the parachute opening force, if any one of the | Nt | and the | N0min | is greater than the threshold lower limit, entering the step 6, and if both are not greater than the threshold lower limit, returning to the step 1; and 4, step 5 and step 3 prevent the temperature value from being unexpected and causing misjudgment, and step 4 and step 5 prevent the temperature value from being unexpected and causing misjudgment.
Step 6: the position reporting device is started and reports the position.
Example three:
a start-up method of a position reporting device based on parachute opening force is based on a start-up mechanism of the first embodiment and comprises the following steps:
step 1: and (4) judging whether the pulling pin is pulled open or not, if so, entering the step 2, and otherwise, entering the step 8.
Step 2: acquiring temperature values Tt1, Tt2 and Tt3 measured by the three temperature-sensitive strain gauges, and taking an average value Tt after eliminating abnormal values; and step 3: judging whether Tt is greater than a temperature limit value T0, if so, entering step 4, otherwise, entering step 5, wherein in the step, height values Ht1, Ht2 and Ht3 measured by three air pressure height sensors are obtained, after abnormal values are eliminated, an average value Ht is obtained, the elimination method is the same as the method for eliminating the temperature abnormal values in step 1, T0 is T0 of the current Ht, and T0 corresponding to different Hts are obtained through the previous experimental measurement; and step 2 and step 3 prevent step 1 from causing accidents and causing misjudgment.
And 4, step 4: starting the position reporting device and reporting the position;
and 5: judging whether the maximum value | Nmax | of the force when the pulling pin is not pulled out is larger than the lower limit | N0min | of the threshold value of the parachute opening force, if so, entering a step 6, otherwise, entering a step 7
Step 6: marking the Nmax as a fault value, and returning to the step 1; this step records fault data for fault analysis after flight is complete
And 7: making | N0min | ═ Nmax |, and returning to step 1; the step corrects | N0min |, and is used for testing whether the force of pin pulling and inserting meets the requirement after the flight is finished, so that misjudgment caused by pin pulling aging is prevented.
And 8: acquiring force values Nt1, Nt2 and Nt3 measured by three temperature sensing strain gauges, and calculating an average scalar value | Nt |; and step 9: if the | Nt | is larger than the maximum value | Nmax | of the force when the pulling pin is not pulled out, the | Nmax | is made to be | Nt |, and the step 1 is returned; and if the | Nt | is smaller than the minimum | Nmin | of the force when the pulling pin is not pulled out, making the | Nmin | equal to the | Nt | and returning to the step 1. The step corrects the stress range in the cavity when the pulling pin is not pulled out in real time, so that the data analysis is facilitated.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. A start-up structure of a position reporting device comprises the position reporting device and is characterized by further comprising an umbrella band operating band, an upper connecting band, an upper buckle, a lower connecting band, a pull pin and a sensing switch;
the upper end of the upper connecting belt is fixedly connected with the umbrella belt operating belt, the upper end of the upper buckle is fixedly connected with the lower end of the upper connecting belt, the upper buckle and the lower buckle are clamped together, the clamping force of the upper buckle and the lower buckle is greater than the upper threshold value limit of the umbrella opening force, the upper end of the lower connecting belt is fixedly connected with the lower end of the lower buckle, and the upper end of the pull pin is fixedly connected with the lower end of the lower connecting belt;
the sensing switch is arranged at the upper end of the position reporting device and comprises a shell, an inner cavity and a three-axis 60-degree strain gage, the upper end of the shell extends downwards to form the inner cavity, the lower end of a pulling pin is inserted in the inner cavity, the force of inserting the pulling pin is greater than the lower threshold value limit of the parachute opening force and smaller than the upper threshold value limit of the parachute opening force, the bottom of the inner cavity is made of an elastic body made of a rubber material, strain gauges of the three-axis 60-degree strain gage are temperature sensing strain gauges which are respectively bonded on the left side, the right side and the bottom of the outer wall of the bottom of the inner cavity, the three temperature sensing strain gauges are electrically connected with a main control board card of the position reporting device, and the position reporting device acquires a force value and a temperature value measured by the temperature sensing strain gauges;
the pulling pin is made of a magnetic conductor, and a magnetic induction circuit is arranged at the position, right below the inner cavity, of the main control board card of the position reporting device; at least three air pressure height sensors are installed in the position reporting device and are electrically connected with a main control board card of the position reporting device, and the position reporting device acquires a height value measured by the air pressure height sensors.
2. A method for booting a temperature-based bit reporting device, using the bit reporting device booting structure as claimed in claim 1, the method comprising the steps of:
step 1: acquiring temperature values Tt1, Tt2 and Tt3 measured by the three temperature-sensitive strain gauges, and taking an average value Tt after eliminating abnormal values;
step 2: judging whether Tt is greater than a temperature limit value T0, if so, entering a step 3, otherwise, returning to the step 1;
and step 3: judging whether the count X is larger than a count limit value X0, if so, entering a step 6, otherwise, adding 1 to the X, and entering a step 4;
and 4, step 4: acquiring force values Nt1, Nt2 and Nt3 measured by three temperature sensing strain gauges, and calculating an average scalar value | Nt |;
and 5: judging whether the | Nt | is greater than 0, judging whether the | Nt | is less than a threshold lower limit | N0min | of the parachute opening force, if any one of the | Nt | and the | N0min | is greater than the threshold lower limit, entering the step 6, and if both are not greater than the threshold lower limit, returning to the step 1;
step 6: the position reporting device is started and reports the position.
3. The method as claimed in claim 2, wherein in step 2, the altitude values Ht1, Ht2, Ht3 measured by three barometric altitude sensors are obtained, and after removing abnormal values, the average value Ht is taken, where T0 is T0 of the current Ht.
4. A method for starting up a position reporting device based on parachute opening force, wherein the method for starting up a position reporting device based on parachute opening force comprises the following steps:
step 1: judging whether the pulling pin is pulled open or not, if so, entering a step 2, and if not, entering a step 8;
step 2: acquiring temperature values Tt1, Tt2 and Tt3 measured by the three temperature-sensitive strain gauges, and taking an average value Tt after eliminating abnormal values;
and step 3: judging whether Tt is greater than a temperature limit value T0, if so, entering a step 4, otherwise, entering a step 5;
and 4, step 4: starting the position reporting device and reporting the position;
and 5: judging whether the maximum value | Nmax | of the force when the pulling pin is not pulled out is larger than the lower limit | N0min | of the threshold value of the parachute opening force, if so, entering a step 6, and if not, entering a step 7;
step 6: marking the Nmax as a fault value, and returning to the step 1;
and 7: making | N0min | ═ Nmax |, and returning to step 1;
and 8: acquiring force values Nt1, Nt2 and Nt3 measured by three temperature sensing strain gauges, and calculating an average scalar value | Nt |;
and step 9: if the | Nt | is larger than the maximum value | Nmax | of the force when the pulling pin is not pulled out, the | Nmax | is made to be | Nt |, and the step 1 is returned; and if the | Nt | is smaller than the minimum | Nmin | of the force when the pulling pin is not pulled out, making the | Nmin | equal to the | Nt | and returning to the step 1.
5. The opening method of an umbrella opening force-based position reporting device as claimed in claim 4, wherein in step 3, the height values Ht1, Ht2 and Ht3 measured by three barometric height sensors are obtained, the average value Ht is taken after removing abnormal values, and T0 is T0 of the current Ht.
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| CN202010149746.4A CN111470050B (en) | 2020-03-06 | 2020-03-06 | Starting structure and starting method of position reporting device |
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| CN202010149746.4A CN111470050B (en) | 2020-03-06 | 2020-03-06 | Starting structure and starting method of position reporting device |
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| CN111470050B true CN111470050B (en) | 2021-07-20 |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2455105Y (en) * | 2000-12-28 | 2001-10-24 | 王胜和 | Positioner for opening umbrella |
| FR2957333B1 (en) * | 2010-03-09 | 2012-03-23 | Eric Fradet | PARACHUTE JUMPING EQUIPMENT FOR DISTRIBUTING THE VOLTAGE STRENGTHS OF A RETARDER, STABILIZER, |
| CN201837722U (en) * | 2010-11-03 | 2011-05-18 | 武汉依迅电子信息技术有限公司 | Wireless network self-service GPS (global positioning system) real-time position reporting device with built-in POI (point of information) |
| CN203567938U (en) * | 2013-09-30 | 2014-04-30 | 黄敏智 | Parachute |
| CN106353774B (en) * | 2016-11-25 | 2019-01-04 | 西安航光卫星测控技术有限公司 | Intelligent Beidou searches and rescues report position instrument and its searches and rescues report position method |
| CN207883535U (en) * | 2017-11-29 | 2018-09-18 | 中国人民解放军海军航空工程学院青岛校区 | A kind of lifesaving wearable device mechanical tensile forces starter |
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