CN213985692U - Impulse testing device and impulse testing system - Google Patents
Impulse testing device and impulse testing system Download PDFInfo
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- CN213985692U CN213985692U CN202023292296.9U CN202023292296U CN213985692U CN 213985692 U CN213985692 U CN 213985692U CN 202023292296 U CN202023292296 U CN 202023292296U CN 213985692 U CN213985692 U CN 213985692U
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Abstract
The utility model belongs to the technical field of the rocket engine test, concretely relates to impulse testing arrangement and system. The utility model discloses by measure bearing frame, mark subassembly, pretension steel band, engine unable adjustment base, displacement locking screw and eddy current sensor organic combination and form. The engine impulse test is simply and reliably carried out through seven steps of connection and adjustment of the impulse test device, calibration of the impulse test device, engine installation, vacuum pumping of a vacuum box, ignition test, calculation of an actual thrust value, obtaining of engine impulse data and data analysis and evaluation.
Description
Technical Field
The utility model belongs to the technical field of the rocket engine test, concretely relates to impulse testing arrangement and system.
Background
With the continuous development of aerospace technology, the human exploration space is continuously expanded. In recent years, the miniaturization of spacecraft has become a trend. Therefore, there is a need for a lighter weight, more precise thrust propulsion system for track control and attitude adjustment. On some spacecraft, fast response capability is also desirable. By adopting the scheme of the solid rocket engine, the mass occupied by the propulsion system can be greatly reduced, and the advantage of easy long-term storage of the solid propellant can be exerted. As is well known, the state of developing the aerospace technology and the satellite sounding technology can be improved comprehensively and rapidly. The application of the method is developed in all directions, and the method has remarkable economic and social benefits.
The experiment of current engine mainly is the experimental test who carries on well, big thrust engine, and in recent years, along with accurate control's increase, the research and development dynamics to novel appearance accuse engine increases, and small thrust engine constantly emerges, and it is urgent to carry out accurate test to it, and this has just provided higher requirement to the measuring method and the test accuracy of experiment frock.
The impulse testing device system is one of the key components of the micro-solid engine propulsion experiment system. The device is mainly used for installing a micro-solid propulsion engine and performing accurate thrust measurement to ensure that the engine is in a specified position and state and the thrust impulse parameter measurement is correct. At present, the technical development of internal engines is rapid, the sizes of various types of engines are continuously increased, and the existing test system cannot comprehensively meet the test requirements of novel micro-solid engines, so that a novel impulse test device is newly developed.
At present, a micro-solid engine impulse testing experiment is complex in calibration mode, high in requirement on an experiment frame and easy to influence measurement precision by external environment. In view of the above, a simple, reliable impulse testing device is an essential product of current micro-solid engine experiments.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a simple, reliable impulse testing arrangement and system.
In order to achieve the above object, the utility model adopts the following technical scheme:
an impulse testing device comprises a measuring bearing frame, a calibration assembly, a pre-tightening steel belt, an engine fixing base, a displacement locking screw and an eddy current sensor; the displacement locking screw is connected to the center of the upper surface of the measuring and bearing frame, and the eddy current sensor is connected to the displacement locking screw; the calibration components are arranged in two groups, and the two groups of calibration components are respectively arranged at two ends of the upper surface of the measurement bearing frame; two ends of the pre-tightening steel belt are respectively connected below the two groups of calibration components; the engine fixing base is detachably connected to the center of the upper surface of the pre-tightening steel belt; the eddy current sensor is positioned under the engine fixing base.
The calibration assembly comprises an upper adjusting block and a lower adjusting block; the upper adjusting block and the lower adjusting block are arranged up and down; the lower adjusting block is fixedly connected with the measuring and bearing frame, the center of the upper surface of the lower adjusting block is provided with a pin hole, two sides of the upper surface of the lower adjusting block are symmetrically provided with waist holes, and an adjusting bolt used for adjusting the elastic stretching amount of the pre-tightening steel belt is arranged in each waist hole; a through hole which penetrates through the upper adjusting block and the lower adjusting block is formed in the center of the upper adjusting block; and two ends of the pre-tightening steel belt are respectively arranged between the upper adjusting block and the lower adjusting block of the calibration assembly at two sides.
The measuring bearing frame comprises an upper panel, a lower panel and a supporting plate; the upper panel and the lower panel are connected through a support plate; and the lower panel is provided with a connecting through hole.
The pre-tightening steel belt is made of FDP802 non-magnetic stainless steel.
The engine fixing base is of a plate-shaped structure with a circular groove in the center, four threaded holes are formed in the periphery of the circular groove, a screw column is arranged in the center of the lower surface of the fixing base, and the bottom of the screw column is a plane.
The displacement locking screw be cylindrical shape, displacement locking screw up end evenly is provided with 4 screw holes that are used for fixed eddy current sensor, displacement locking screw lower part lateral wall is provided with the screw thread, moves the locking screw center and is provided with through-hole along the axial.
An impulse testing system at least comprises an impulse testing device, a vacuum box, a data acquisition analyzer and a standard weight; the impulse testing device is connected to the vacuum box; the data acquisition analyzer is in electrical signal connection with the eddy current sensor; the standard weight is connected to the engine fixing base during calibration; an engine ignition wire is arranged in the vacuum box.
Has the advantages that:
(1) the utility model discloses a weight is markd before the experiment, ensures the utility model discloses the stability of device self and the degree of accuracy of experimental data.
(2) The utility model discloses collect data acquisition and handle as an organic whole, when testing the vehicle, this measuring device can ensure that the engine is fixed a position and fix on measuring device according to required experimental state, real-time data when igniteing the engine is gathered to carry out analysis processes to the data of gathering, compare with the design task book, assess performance, precision, reliability etc. to the engine, and expose some problems of engine development in-process, thereby point out the direction and look for the way of solving the problem for improving the design.
The above description is only an overview of the technical solution of the present invention, and in order to clearly understand the technical means of the present invention and to implement the technical solution according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a front view of the structure of the present invention.
Fig. 2 is a top view of the structure of the present invention.
In the figure: 1-measuring a load-bearing frame; 2-calibrating the component; 3-pre-tightening the steel belt; 4-an engine fixing base; 5-moving a locking screw; 6-an eddy current sensor; 7-upper adjusting block; 8-lower adjustment block.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1-2, the impulse testing device comprises a measuring bearing frame 1, a calibration component 2, a pre-tightening steel belt 3, an engine fixing base 4, a displacement locking screw 5 and an eddy current sensor 6; the displacement locking screw 5 is connected to the center of the upper surface of the measuring bearing frame 1, and the eddy current sensor 6 is connected to the displacement locking screw 5; the calibration assemblies 2 are arranged in two groups, and the two groups of calibration assemblies 2 are respectively arranged at two ends of the upper surface of the measurement bearing frame 1; two ends of the pre-tightening steel belt 3 are respectively connected below the two groups of calibration components 2; the engine fixing base 4 is detachably connected to the center of the upper surface of the pre-tightening steel belt 3; the eddy current sensor 6 is positioned right below the engine fixing base 4.
In actual use, a lower panel of a measuring bearing frame 1 in an impulse testing device is connected and fixed with a vacuum box, two groups of calibration components 2 are respectively fixed at two ends of the upper surface of the measuring bearing frame 1, two ends of a pre-tightening steel belt 3 are respectively arranged between an upper adjusting block 7 and a lower adjusting block 8 and are tightly pressed, the distance between an eddy current sensor and the steel belt is adjusted to be 1mm, and the eddy current sensor is aligned with an engine fixing base; then, mounting a standard weight on the engine fixing base 4, adding the standard weight for multiple times according to a preset weight with the same weight value to obtain multiple calibration step values, acquiring multiple calibration displacement variable data of the pre-tightening steel strip 3 at the multiple calibration step values by the eddy current sensor 6, sending the acquired data to the data acquisition analyzer, and recording the data by the data acquisition analyzer; then, taking down the standard weight, installing the engine on the engine fixing base 4, connecting the engine with an engine ignition wire in the vacuum box, sealing the vacuum box, opening the vacuum pump to vacuumize the vacuum box to a preset pressure, and closing the vacuum pump; then, the engine is ignited, and the data acquisition analyzer acquires the actual displacement variable value of the pre-tightening steel strip 3 during the ignition of the engine and records the thrust variation time domain data and the duration; substituting the data recorded by the data acquisition analyzer and the actual displacement variable value in the fourth step into a thrust calculation formula to calculate an actual thrust value; then, the actual thrust value and the recorded action time length of the force are substituted into an impulse calculation formula I which is Ft, and engine impulse data are obtained; and then the data acquisition analyzer compares the obtained engine impulse data with a design task book and outputs the performance, precision and reliability evaluation results of the engine. And when the engine is installed in the third step and the vacuum box is vacuumized, the preset vacuumizing pressure in the vacuum box is less than 10 Pa.
The utility model discloses need carry out static calibration before formal test in order to verify, calibrate equipment precision itself, when carrying out static calibration, observe that pretension steel band 3 whether exists deformation, damage, mark subassembly 2 and to pretension steel band 3 stretch too tightly or pretension steel band 3 both ends atress not enough even, according to the calibration rule check prepare before marking. Satisfy the regulation and require the back, carry out the weight and mark, the utility model discloses carry out the weight mark before the experiment, choose suitable weight for use according to the demand to satisfy this equipment in the loaded stability of the small power value of static calibration required, the weight is markd and is carried the weight with tweezers and increase one by one and steadilyd decrease, and the weight is through the appraisal of accreditation mechanism, avoids hand and external article to contact. When increasing the weight and degressive the weight, the current vortex sensor 6 record and gather 3 displacement volume changes of pretension steel band, increase experimental facilities collection data degree of accuracy, repeatability and experimental frame stability.
Adopt the utility model discloses carry out the impulse test, not only simple, it is reliable moreover.
Example two:
referring to fig. 1 and fig. 2, an impulse testing device according to a first embodiment: the calibration component 2 comprises an upper adjusting block 7 and a lower adjusting block 8; the upper adjusting block 7 and the lower adjusting block 8 are arranged up and down; the lower adjusting block 8 is fixedly connected with the measuring and bearing frame 1, the center of the upper surface of the lower adjusting block 8 is provided with a pin hole, two sides of the upper surface of the lower adjusting block are symmetrically provided with waist holes, and an adjusting bolt used for adjusting the elastic stretching amount of the pre-tightening steel belt 3 is arranged in each waist hole; a through hole which penetrates through the upper adjusting block 7 from top to bottom is formed in the center of the upper adjusting block; two ends of the pre-tightening steel belt 3 are respectively arranged between an upper adjusting block 7 and a lower adjusting block 8 of the calibration components 2 on two sides.
During actual use, the calibration component 2 is equivalent to a steel belt adjusting seat, the pre-tightening steel belt 3 is tightly pressed by the upper adjusting block 7 and the lower adjusting block 8, pin holes are formed in the middle of the calibration component 2 and two ends of the pre-tightening steel belt 3, and the calibration component is tightly fixed by pins to prevent displacement. The screw column at the lower end of the engine fixing base 4 is locked by a nut through the center round hole of the pre-tightening steel belt 3, and the locking screw 5 is moved to be aligned with the center round hole of the pre-tightening steel belt 3 on the engine fixing base 4 and keep a proper distance.
Demarcate subassembly 2 and adopt this technical scheme, can further ensure the utility model discloses the accuracy nature of test.
Example three:
referring to an impulse testing device shown in fig. 1, on the basis of the first embodiment: the measuring bearing frame 1 comprises an upper panel, a lower panel and a supporting plate; the upper panel and the lower panel are connected through a support plate; and the lower panel is provided with a connecting through hole.
When in actual use, the measurement bearing frame 1 adopts the technical scheme, so that the whole experiment frame is convenient to be stable, and the engine can be horizontally installed.
Example four:
referring to fig. 1 and fig. 2, an impulse testing device according to a first embodiment: the pre-tightening steel belt 3 is made of FDP802 non-magnetic stainless steel.
When in actual use, the pre-tightening steel strip 3 has the characteristics of good non-magnetism and good stretchability, is used for generating elastic linear displacement change during experimental calibration, and is convenient for an acquisition system to acquire impulse generated during engine test and weight calibration.
Example five:
referring to fig. 1 and fig. 2, an impulse testing device according to a first embodiment: the engine fixing base 4 is of a plate-shaped structure with a circular groove in the center, four threaded holes are formed in the periphery of the circular groove, a screw column is arranged in the center of the lower surface of the fixing base 4, and the bottom of the screw column is a plane.
When in actual use, the circular recess on the engine unable adjustment base 4 has the circular processing concave surface of weight size, makes things convenient for the weight to mark and puts at central hole site, has 4 screw holes around the recess, and the engine of easy to assemble simulation, the setting of screw post is convenient for install at 3 central preformed holes of pretension steel band, and screw post bottom is the machined surface for 6 gauge outfit measurements of current vortex sensor.
The engine fixing base 4 in the plate embodiment is made of hard aluminum, so that the weight is reduced, the influence on the elastic variable of the pre-tightening steel belt is reduced, the time efficiency of engine installation is improved, and the error generated in engine centering is reduced.
The fixing base adopts the technical scheme, the situation that the weight is not placed in the middle can be avoided, the operation is simple, and the reliability of the impulse testing device is improved.
Example six:
referring to an impulse testing device shown in fig. 1, on the basis of the first embodiment: the displacement locking screw 5 be cylindrical shape, 5 up end of displacement locking screw evenly is provided with 4 screw holes that are used for fixed eddy current sensor 6, 5 lower part lateral walls of displacement locking screw are provided with the screw thread, move 5 centers of locking screw and be provided with through-hole along the axial.
When in actual use, the lower side wall of the displacement locking screw 5 is provided with threads which can be convenient for adjusting the displacement of the displacement locking screw 5, the center of the displacement locking screw 5 is provided with a through hole along the axial direction, and the eddy current sensor 6 can be conveniently fixed and installed by penetrating the head from the bottom of the displacement locking screw 5.
The displacement locking screw 5 adopts the technical scheme, and the distance between the induction head of the eddy current sensor 6 and the engine fixing base 4 can be conveniently adjusted.
Example seven:
an impulse testing system at least comprises an impulse testing device, a vacuum box, a data acquisition analyzer and a standard weight; the impulse testing device is connected to the vacuum box; the data acquisition analyzer is in electric signal connection with the eddy current sensor 6; the standard weight is connected to the engine fixing base 4 during calibration; an engine ignition wire is arranged in the vacuum box.
In actual use, a lower panel of a measuring bearing frame 1 in an impulse testing device is connected and fixed with a vacuum box, two groups of calibration components 2 are respectively fixed at two ends of the upper surface of the measuring bearing frame 1, two ends of a pre-tightening steel belt 3 are respectively arranged between an upper adjusting block 7 and a lower adjusting block 8 and are tightly pressed, the distance between an eddy current sensor and the steel belt is adjusted, and the eddy current sensor is aligned with an engine fixing base; then, a standard weight is installed on an engine fixing base 4, the weight of the weight is increased according to a preset value, an eddy current sensor 6 acquires displacement change data of the pre-tightening steel strip 3 and sends the acquired data to a data acquisition analyzer, and the data acquisition analyzer calculates weight change time domain data according to a calculation formula obtained by calibration and calculates to obtain calibration impulse data; then, taking down the standard weight, installing the engine on the engine fixing base 4, connecting the engine with an engine ignition wire in the vacuum box, sealing the vacuum box, opening the vacuum pump to vacuumize the vacuum box to a preset pressure, and closing the vacuum pump; the method comprises the following steps that an engine is ignited, and a data acquisition analyzer acquires real-time experimental data during ignition of the engine; the data acquisition analyzer brings the acquired real-time experimental data of the engine during ignition into a calculation formula obtained by calibration to obtain thrust variation time domain data and engine impulse data, compares the obtained data with a design task book, and outputs performance, precision and reliability evaluation results of the engine.
Adopt the technical scheme of the utility model to carry out the impulse test, not only simple, reliable moreover.
In this embodiment, the data acquisition analyzer is connected to the eddy current sensor 6 via an electrical signal, the device acquisition device is a PC-based measurement and control system available from the us NI corporation, and the NI hardware product is connected to a PC or a notebook computer via a USB or ethernet. The CompactDAQ chassis is connected to the PC and integrated signal conditioning I/O modules are inserted in the chassis. The data acquisition equipment develops special test software by taking Microsoft VC + +6.0 as a development environment, and the software mainly has the following functions:
file operation: opening/saving a data file, importing calibration data and exporting the data file;
signal setting: setting parameters such as a module, a channel, filtering, an input range and the like corresponding to the signal;
signal calibration: calibrating the sensor, calculating the linear, lag and repeatability precision and calculating the use precision;
signal monitoring: displaying the selected signal curve and instantaneous value, but not storing;
data acquisition: collecting and storing signal values in real time, and displaying selected signal curves and instantaneous values in real time;
the curves show that: the curve can be horizontally stretched, and a signal value at the moment corresponding to the mouse is displayed;
data processing: the pushing pressure sensor signal which is accessed in an expanding way can be processed and analyzed;
and (3) report printing: printing calibration records, data curves, signal instantaneous values, data summary tables and the like;
the file format is as follows: each test corresponds to a data file, and the data file comprises signal parameter settings, calibration records, test data and data processing results of all paths.
Example eight:
an impulse testing method of an impulse testing system comprises the following steps:
the method comprises the following steps: connecting and adjusting an impulse testing device;
connecting and fixing a lower panel of a measuring bearing frame 1 in an impulse testing device with a vacuum box, respectively fixing two groups of calibration components 2 at two ends of the upper surface of the measuring bearing frame 1, respectively placing and pressing two ends of a pre-tightening steel belt 3 between an upper adjusting block 7 and a lower adjusting block 8, adjusting the distance between an eddy current sensor and the steel belt to be a preset value, and centering the eddy current sensor with an engine fixing base;
step two: calibrating the impulse testing device;
installing a standard weight on an engine fixing base 4, adding the standard weight for multiple times according to a preset weight with the same weight value to obtain multiple calibration step values, acquiring multiple calibration displacement variable data of the pre-tightening steel strip 3 at the multiple calibration step values by an eddy current sensor 6, sending the acquired data to a data acquisition analyzer, and recording the data by the data acquisition analyzer;
step three: installing an engine and vacuumizing the vacuum box;
after the second step is finished, taking down the standard weight, mounting the engine on the engine fixing base 4, connecting the engine with an engine ignition wire in the vacuum box, sealing the vacuum box, opening the vacuum pump to vacuumize the vacuum box to a preset pressure, and closing the vacuum pump;
step four: performing ignition experiment;
the engine is ignited, and the data acquisition analyzer acquires the actual displacement variable value of the pre-tightening steel strip 3 during the ignition of the engine and records the thrust variation time domain data and the duration;
step five: calculating an actual thrust value
Substituting the data recorded by the data acquisition analyzer in the step two and the actual displacement variable value in the step four into a thrust calculation formula
Calculating an actual thrust value by the maximum calibration value/the maximum calibration displacement variable value which is the actual thrust value/the actual displacement variable value;
step six: obtaining engine impulse data;
substituting the actual thrust value obtained in the fifth step and the action duration of the force recorded in the fourth step into an impulse calculation formula I which is Ft to obtain engine impulse data;
wherein: i is engine impulse;
f is constant force, namely thrust N;
t is the force action time s;
step seven: analyzing and evaluating data;
and the data acquisition analyzer compares the engine impulse data obtained in the step six with the design task book and outputs the performance, precision and reliability evaluation results of the engine.
Preferably, the preset value of the distance between the eddy current sensor and the steel strip in the first step is 1 mm.
Preferably, when the engine is installed and the vacuum box is vacuumized in the third step, the preset pressure for vacuumizing in the vacuum box is less than 10 Pa.
In actual use, static calibration is required before formal testing. The device accuracy is verified and calibrated, when static calibration is carried out, whether the pre-tightening steel strip is deformed or damaged or not needs to be observed, the pre-tightening steel strip is stretched too tightly or the stress at two ends of the steel strip is not uniform enough by the calibration assembly, and inspection preparation before calibration is carried out according to a calibration rule. And (4) calibrating the weights according to the regulation requirements, and performing analysis and calculation according to the data obtained by the data acquisition system after calibration is finished to obtain the precision of the test stand. And the data acquisition analyzer clearly outputs the data analysis and evaluation result.
To sum up, the utility model comprises a measuring bearing frame, a calibration component, a pre-tightening steel belt, an engine fixing base, a displacement locking screw and an eddy current sensor; the displacement locking screw is connected to the center of the upper surface of the measuring bearing frame, and the eddy current sensor is connected to the displacement locking screw; the calibration components are arranged in two groups, and the two groups of calibration components are respectively arranged at two ends of the upper surface of the measurement bearing frame; two ends of the pre-tightening steel belt are respectively connected below the two groups of calibration components; the engine fixing base is detachably connected to the center of the upper surface of the pre-tightening steel belt; the eddy current sensor is positioned under the engine fixing base. The engine impulse test is simply and reliably carried out through seven steps of connection and adjustment of the impulse test device, calibration of the impulse test device, engine installation, vacuum pumping of a vacuum box, ignition test, calculation of an actual thrust value, obtaining of engine impulse data and data analysis and evaluation.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
In the case of no conflict, a person skilled in the art may combine the related technical features in the above examples according to actual situations to achieve corresponding technical effects, and details of various combining situations are not described herein.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
The foregoing is illustrative of the preferred embodiments of the present invention, and the present invention is not to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. Any simple modification, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention all fall within the scope of the technical solution of the present invention.
Claims (7)
1. An impulse testing device is characterized in that: the device comprises a measuring bearing frame (1), a calibration component (2), a pre-tightening steel belt (3), an engine fixing base (4), a displacement locking screw (5) and an eddy current sensor (6); the displacement locking screw (5) is connected to the center of the upper surface of the measuring bearing frame (1), and the eddy current sensor (6) is connected to the displacement locking screw (5); the calibration assemblies (2) are arranged in two groups, and the two groups of calibration assemblies (2) are respectively arranged at two ends of the upper surface of the measurement bearing frame (1); two ends of the pre-tightening steel belt (3) are respectively connected below the two groups of calibration components (2); the engine fixing base (4) is detachably connected to the center of the upper surface of the pre-tightening steel belt (3); the eddy current sensor (6) is positioned under the engine fixing base (4).
2. An impulse testing device as claimed in claim 1, characterized in that: the calibration component (2) comprises an upper adjusting block (7) and a lower adjusting block (8); the upper adjusting block (7) and the lower adjusting block (8) are arranged up and down; the lower adjusting block (8) is fixedly connected with the measuring bearing frame (1), the center of the upper surface of the lower adjusting block (8) is provided with a pin hole, waist holes are symmetrically arranged on two sides of the upper surface of the lower adjusting block, and adjusting bolts used for adjusting the elastic stretching amount of the pre-tightening steel belt (3) are arranged in the waist holes; a through hole which penetrates through the upper adjusting block and the lower adjusting block is formed in the center of the upper adjusting block (7); two ends of the pre-tightening steel belt (3) are respectively arranged between an upper adjusting block (7) and a lower adjusting block (8) of the calibration assemblies (2) at two sides.
3. An impulse testing device as claimed in claim 1, characterized in that: the measuring bearing frame (1) comprises an upper panel, a lower panel and a supporting plate; the upper panel and the lower panel are connected through a support plate; and the lower panel is provided with a connecting through hole.
4. An impulse testing device as claimed in claim 1, characterized in that: the pre-tightening steel belt (3) is made of FDP802 non-magnetic stainless steel.
5. An impulse testing device as claimed in claim 1, characterized in that: the engine fixing base (4) is of a plate-shaped structure with a circular groove at the center, four threaded holes are formed in the periphery of the circular groove, a screw column is arranged at the center of the lower surface of the fixing base (4), and the bottom of the screw column is a plane.
6. An impulse testing device as claimed in claim 1, characterized in that: the displacement locking screw (5) be the cylinder shape, displacement locking screw (5) up end evenly is provided with 4 screw holes that are used for fixed eddy current sensor (6), displacement locking screw (5) lower part lateral wall is provided with the screw thread, moves locking screw (5) center and is provided with through-hole along the axial.
7. An impulse testing system, characterized by: the impulse testing device at least comprises the impulse testing device as recited in any one of claims 1 to 5, and further comprises a vacuum box, a data acquisition analyzer and a standard weight; the impulse testing device is connected to the vacuum box; the data acquisition analyzer is in electrical signal connection with the eddy current sensor (6); the standard weight is connected to the engine fixing base (4) during calibration; an engine ignition wire is arranged in the vacuum box.
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