CN111442868A - Sensor lateral installation protection device for explosion test - Google Patents
Sensor lateral installation protection device for explosion test Download PDFInfo
- Publication number
- CN111442868A CN111442868A CN202010229792.5A CN202010229792A CN111442868A CN 111442868 A CN111442868 A CN 111442868A CN 202010229792 A CN202010229792 A CN 202010229792A CN 111442868 A CN111442868 A CN 111442868A
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- sensor
- cover plate
- lock catch
- connecting lock
- protection device
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/14—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the force of explosions; for measuring the energy of projectiles
Abstract
The invention belongs to the technical field of impact dynamics testing, and relates to a lateral installation protection device for a sensor for explosion testing. The sensor solves the problem of difficult survival of the sensor under the action of the explosion shock wave, and comprises a sensor mounting box, a shaft seat, a connecting lock catch, a wind bearing plate and a cover plate assembly; a rotating shaft is arranged in the shaft seat and fixed at the top of the sensor mounting box; the left end of the connecting lock catch is fixedly connected with the rotating shaft, and the right end of the connecting lock catch is fixed with the wind bearing plate; the lower end of the cover plate component is hinged with the bottom of the sensor installation box, and the upper end of the cover plate component is locked with the connecting lock catch; the left side surface of the cover plate component covers the sensitive surface of the sensor; when the wind bearing plate turns under the impact of the explosion shock wave, the connecting lock catch is separated from the cover plate assembly, and the sensitive surface of the sensor is exposed. The invention utilizes the mechanical device structure to eliminate the direct impact damage effect of the first peak of the shock wave on the test sensor, quickly exposes the sensitive device of the test sensor in the range of a test field, finishes the acquisition of experimental data and has little influence on the accuracy of the data acquired by the experiment.
Description
Technical Field
The invention belongs to the technical field of impact dynamics testing, and particularly relates to a lateral installation protection device for a sensor for explosion testing.
Background
The impact dynamics testing technology is an important means in the impact dynamics experimental research, the acquisition rate and the accuracy of testing data directly influence the impact dynamics experimental research conclusion, and the impact dynamics testing technology is one of important factors for restricting the rapid development of the subject. In the explosion experiment, the force of the shock wave acting on the object decays exponentially, the pressure at the first peak is very high, but the decay is extremely fast. Often, the test sensor is difficult to survive under the impact of the bow wave peak, often being tenths of one. It is difficult to obtain experimental data due to damage to the sensor, and in particular, accurate and complete experimental data is more difficult to obtain, resulting in failure of the experiment or an increase in the number of repeated experiments. Therefore, in the impact dynamics experimental study, the test sensor can well survive, the acquisition rate of experimental test data is greatly improved, and meanwhile, the experimental study period and the study cost can be reduced.
Disclosure of Invention
In order to solve the problem of difficult survival of the sensor under the action of the explosion shock wave, the invention designs a protection device of the test sensor, which utilizes the structural design of a mechanical device to eliminate the direct impact destruction effect of the first peak of the shock wave on the test sensor, and then quickly exposes the sensitive device of the test sensor in the range of a test field to finish the acquisition of experimental data, and has little influence on the accuracy of the data acquired by the experiment.
The technical scheme of the invention is to provide a sensor lateral installation protection device for explosion test, which is characterized in that: the sensor mounting box comprises a sensor mounting box, a shaft seat, a connecting lock catch, a wind bearing plate and a cover plate assembly;
the sensor mounting box is used for mounting a sensor, and after the sensor mounting box is mounted, the sensitive surface of the sensor is ensured to be exposed outside the box body;
a rotating shaft is arranged in the shaft seat and fixed at the top of the sensor mounting box;
the left end of the connecting lock catch is fixedly connected with the rotating shaft, and the right end of the connecting lock catch is fixedly provided with the wind bearing plate;
the lower end of the cover plate assembly is hinged with the bottom of the sensor mounting box, and the upper end of the cover plate assembly is matched and locked with the connecting lock catch; at the moment, the left side surface of the cover plate component covers the sensitive surface of the sensor, and the wind bearing plate is vertical to the sensitive surface of the sensor;
when the wind bearing plate turns under the impact of explosion shock waves, the connecting lock catch can be separated from the cover plate assembly, and the cover plate assembly rotates around the hinged part under the action of gravity to expose the sensitive surface of the sensor.
Furthermore, a clamping groove is formed in the matching position of the connecting lock catch and the upper end of the cover plate assembly, and when the wind bearing plate turns under the impact of explosive shock waves, the upper end of the cover plate assembly is separated from the clamping groove.
Further, this protection device still includes the balancing weight, and above-mentioned balancing weight is fixed on the right flank of apron subassembly, and apron subassembly and the focus of balancing weight are in the outside at articulated position, will keep away from the one side definition of sensor install bin as the outside.
Further, this protection device still includes the apron pivot, the lower extreme of apron subassembly is passed through the apron pivot with the bottom of sensor install bin and is articulated.
Furthermore, the top and the bottom of the sensor mounting box are provided with supporting parts extending out of the box body; the shaft seat is fixed on a supporting part positioned at the top of the sensor mounting box; the lower end of the cover plate assembly is hinged with a supporting part positioned at the bottom of the sensor mounting box.
Furthermore, the cover plate assembly comprises a left cover plate and a right cover plate which are parallel to each other, and a connecting rod for connecting the left cover plate and the right cover plate;
the balancing weight is fixed on the right side cover plate;
the lower end of the right side cover plate is hinged with the supporting part at the bottom, and the other end of the right side cover plate is locked with the connecting lock catch; the length of the left side cover plate is smaller than the distance between the two supporting parts, so that when the right side cover plate is locked by the connecting lock catch, the left side cover plate can be positioned between the two supporting parts to cover the sensitive surface of the sensor.
The invention has the following beneficial effects:
1. the opening time scale of the end cover assembly is far larger than the shock wave transmission and attenuation time scale, and the direct damage effect of the shock wave head peak on the sensor can be effectively eliminated, so that the sensor is protected, the survival of various measuring sensors under various strong shock waves is ensured, the experimental data acquisition rate of the measuring sensors can be effectively improved, the experimental research period is shortened, and the research cost is reduced.
2. The invention can realize the protection of the sensor under the action of the explosion shock wave by using an ingenious mechanical structure, thereby effectively reducing the experimental cost, and the cover plate component is opened to expose the sensitive surface of the sensor by impacting the wind bearing plate by the shock wave without potential safety hazard.
Drawings
FIG. 1 is a schematic view of the environment in which the present invention is used;
FIG. 2 shows the main structure and installation status of the protection device;
FIG. 3 is a schematic view of a locking structure of the protection device;
FIG. 4 shows an initial working state of the protection device;
FIG. 5 illustrates an intermediate state of operation of the protection device;
FIG. 6 is a state of the protection device in which the operation is completed;
in the figure: 1-forward mounting position of the sensor; 2-sensor lateral mounting position; 3-experimental space; 4-core burst position; 5-a sensor mounting box; 51-a support; 6-a sensor; 7-shaft seat; 71 a rotating shaft; 8, connecting a lock catch; 9-a wind bearing plate; 10-a cover plate assembly; 101-left side cover plate; 102-right side cover plate; 103-connecting rod; 104-gear lever; 11-a counterweight block; 12-cover plate rotating shaft.
Detailed Description
The invention is described in detail below with reference to the figures and the specific embodiments.
Fig. 1 is a schematic view of a use environment according to the present invention, an explosion experiment is performed in an experiment space 3, a position of a center of explosion is a position indicated by reference numeral 4, and two mounting manners of a test sensor in the experiment are provided, wherein one is a forward mounting manner of the position 1, that is, a sensitive surface of the sensor is perpendicular to a propagation direction of an explosion shock wave; and the other is a lateral installation mode of the position 2, namely that the sensitive surface of the sensor is parallel to the propagation direction of the explosion shock wave. The invention is suitable for protecting the sensor at the position 2, and can eliminate the direct impact damage effect of the first peak of the shock wave on the test sensor.
Fig. 2 shows the main structure and installation state of the side-mounted sensor protection device. The structure of the wind-bearing plate mainly comprises a sensor installation box 5, a sensor 6, a shaft seat 7, a connecting lock catch 8, a wind-bearing plate 9, a cover plate component 10, a balancing weight 11 and a cover plate rotating shaft 12. In an experiment, the sensor installation box 5 is generally fixedly installed on a wall, the ground or other fixed supports at a measuring point of an experiment space.
The sensors 6 for testing are arranged in the sensor installation box 5, the sensitive surfaces of the sensors are exposed outside the box body, the number of the sensors can be increased or decreased according to experimental requirements, and the sensors are arranged on a certain side wall of the sensor installation box 5 in a regular mode. The top and the bottom of the sensor mounting box 5 have supporting parts 51 extending in the same direction, and the shaft seat 7 is fixed on the supporting part 51 at the top and is provided with a rotating shaft 71 therein. The left end of the connecting lock catch 8 is arranged on the rotating shaft 71 in the shaft seat 7, the right end of the connecting lock catch is connected with the wind bearing plate 9, the plane where the wind bearing plate 9 is located is perpendicular to the sensitive surface of the sensor 6, namely, the wind bearing plate 9 is perpendicular to the propagation direction of the explosion shock wave during testing, and directly faces the shock wave. As can be seen from fig. 3, the lower end of the cover plate assembly 10 is hinged to the supporting portion 51 located at the bottom through the cover plate rotating shaft 12, the upper end of the cover plate assembly is provided with a fixed link rod 104, the connecting lock catch 8 is provided with a U-shaped groove, in the initial installation state of the experiment, the link rod 104 is just located in the U-shaped groove, the cover plate assembly 10 can be locked to prevent the rotation, and at this time, the left side surface of the cover plate assembly 10 covers the sensitive surface of the sensor 6. When the windband 9 is deflected under the impact of the blast shock wave, the upper end of the cover plate assembly 10 is disengaged from the catch. Other locking structures may also be employed in other embodiments. The balancing weight 11 is fixed on the right side face of the cover plate assembly 10, so that the gravity center of the cover plate assembly 10 and the balancing weight 11 is ensured to be positioned outside the cover plate rotating shaft 12, and when no other constraint exists, the cover plate assembly 10 can rotate around the cover plate rotating shaft 12 under the action of gravity to expose the sensitive face of the sensor 6.
As can be seen from the figure, the cover plate assembly 10 of the present embodiment is composed of a left cover plate 101, a right cover plate 102 and a connecting rod 103 located between the left cover plate 101 and the right cover plate 102, and a weight 11 is fixed on the right cover plate 102. The length of the right side cover plate 102 is greater than that of the left side cover plate 101, one end of the right side cover plate is hinged to the supporting portion 51 located at the bottom through the cover plate rotating shaft 12, the stop lever 104 fixedly connected to the other end of the right side cover plate is locked by the U-shaped groove formed in the connecting lock catch 8, the length of the left side cover plate 101 is slightly smaller than the distance between the two supporting portions, and when the connecting lock catch 8 is used for buckling the right side cover plate 102, the left side cover plate 101 can be located between the two supporting portions to cover the sensitive.
Fig. 4 is protection device open state, namely under the effect of explosion shock wave, the windward board 9 openly bears shock wave pressure, it is rotatory to drive the pivot in the shaft seat 7 of connecting lock catch 8, loosen the restraint to the apron subassembly 10 upper end, apron subassembly 10 is rotatory around apron pivot 12 under the effect of gravity, expose the sensitive face of sensor 6, sensor 6 exposes in the explosion environment basically this moment, can survey pressure, temperature isoparametric under the quasi-static and static condition in the experiment space behind the explosion. Fig. 5 and 6 show the subsequent state of the protection device.
As mentioned above, the present invention is used as a non-reversible process, and the working principle thereof can be described simply as: the left side of the main structure end cover assembly 10 of the invention shields the sensor 6 at the initial stage of installation, and plays a role in protection. The connecting lock 8 locks the end cap assembly 10 in the installed state. In the use process, the wind bearing plate 9 bears the positive impact action of the impact wave, drives the connecting lock catch 8 to rotate around a rotating shaft in the shaft seat 7, and releases the state locking of the connecting lock catch 8 to the end cover assembly 10. The end cover assembly 10 rotates downwards around the cover plate rotating shaft 12 under the influence of self weight and the gravity of the balancing weight 11, and a sensitive surface of the sensor 6 is exposed, so that experimental parameters are measured. Because the opening time scale of the mechanical structure is far larger than the transmission and attenuation time scale of the shock wave, the device can eliminate the direct damage effect of the first peak of the shock wave on the sensor 5, thereby playing the role of protecting the sensor 5.
It is to be understood that the positional or orientational terms such as "front, rear, upper, lower, left, right", "transverse, vertical, horizontal" and "top, bottom" and the like are generally based on the positional or orientational relationships illustrated in the drawings and are presented only for convenience in describing the invention and for simplicity in description, and that these positional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation without having to be otherwise specified and are therefore not to be considered limiting on the scope of the invention; the terms "inner" and "outer" refer to the inner and outer contours of the respective component itself, and unless otherwise stated, the terms do not have any special meaning, and therefore, should not be construed as limiting the scope of the present invention. In addition, it should be noted that fig. 1-5 are exemplary only, are not drawn to scale, and should not be taken as limiting the scope of the invention.
Claims (6)
1. The utility model provides a sensor side direction installation protection device is used in explosion test which characterized in that: comprises a sensor mounting box (5), a shaft seat (7), a connecting lock catch (8), a wind bearing plate (9) and a cover plate component (10);
the sensor mounting box (5) is used for mounting a sensor, and after the sensor mounting box is mounted, the sensitive surface of the sensor is exposed outside the box body;
a rotating shaft (71) is arranged in the shaft seat (7) and is fixed at the top of the sensor installation box (5);
the left end of the connecting lock catch (8) is fixedly connected with the rotating shaft (71), and the right end is fixed with the wind bearing plate (9);
the lower end of the cover plate component (10) is hinged with the bottom of the sensor installation box (5), and the upper end of the cover plate component is matched and locked with the connecting lock catch (8); at the moment, the left side surface of the cover plate component (10) covers the sensitive surface of the sensor (6), and the wind bearing plate (9) is vertical to the sensitive surface of the sensor;
when the wind bearing plate (9) turns under the impact of explosion shock waves, the connecting lock catch (8) and the cover plate assembly (10) can be separated, and under the action of gravity, the cover plate assembly (10) rotates around the hinged part to expose the sensitive surface of the sensor (6).
2. The sensor side-mount protection device for explosion testing of claim 1, wherein: the upper end of the cover plate assembly (10) is separated from the clamping groove when the wind bearing plate (9) turns under the impact of explosive shock waves.
3. The sensor side-mount protection device for explosion testing of claim 2, wherein: still include balancing weight (11), balancing weight (11) are fixed on the right flank of apron subassembly (10), and apron subassembly (10) and balancing weight (11) the focus in the outside at articulated position, will keep away from one side definition of sensor install bin (5) as the outside.
4. The sensor side-mount protection device for explosion testing of claim 3, wherein: the sensor mounting box is characterized by further comprising a cover plate rotating shaft (12), wherein the lower end of the cover plate assembly (10) is hinged to the bottom of the sensor mounting box (5) through the cover plate rotating shaft (12).
5. The sensor side-mount protection device for explosion testing of claim 4, wherein: the top and the bottom of the sensor mounting box (5) are provided with supporting parts extending out of the box body; the shaft seat (7) is fixed on a supporting part positioned at the top of the sensor mounting box (5); the lower end of the cover plate component (10) is hinged with a supporting part positioned at the bottom of the sensor installation box (5).
6. The sensor side-mount protection device for explosion testing according to any one of claims 3 to 5, wherein: the cover plate assembly (10) comprises a left cover plate (101) and a right cover plate (102) which are parallel to each other, and further comprises a connecting rod (103) used for connecting the left cover plate (101) and the right cover plate (102);
the balancing weight (11) is fixed on the right side cover plate (102);
the lower end of the right side cover plate (102) is hinged with a supporting part (51) positioned at the bottom, and the other end of the right side cover plate is locked with the connecting lock catch (8); the length of the left cover plate (101) is smaller than the distance between the two supporting parts (51), so that when the connecting lock catch (8) locks the right cover plate (102), the left cover plate (101) can be positioned between the two supporting parts to cover the sensitive surface of the sensor (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010229792.5A CN111442868B (en) | 2020-03-27 | 2020-03-27 | Sensor lateral installation protection device for explosion test |
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| CN202010229792.5A CN111442868B (en) | 2020-03-27 | 2020-03-27 | Sensor lateral installation protection device for explosion test |
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| CN111442868A true CN111442868A (en) | 2020-07-24 |
| CN111442868B CN111442868B (en) | 2021-06-08 |
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| CN115421186A (en) * | 2022-08-25 | 2022-12-02 | 西北核技术研究所 | Flexible long rod type sensor mounting rack and manufacturing method and mounting method thereof |
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