CN113324448A - Method and device for testing pneumatic pressure of ammunition explosion field - Google Patents
Method and device for testing pneumatic pressure of ammunition explosion field Download PDFInfo
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Abstract
The invention provides a pneumatic pressure testing method and a pneumatic pressure testing device for an ammunition explosion field, wherein the method comprises the following steps that firstly, the pneumatic pressure testing device is installed in the explosion field; secondly, connecting the pneumatic pressure testing device with a testing instrument; step three, shock wave data processing; step four, calculating the static pressure of the shock wave of the end surface of the pressure measuring rod; fifthly, calculating the Mach number of the fluid after the static pressure impact of the end surface of the pressure measuring rod; calculating wind pressure; and step seven, establishing a model of the change of the pneumatic pressure along with the time. The invention adopts a shock wave pressure measuring structure with a combination of double axial multi-sensors to obtain the total pressure and the static pressure of shock waves at a measuring point position, and obtains the wind pressure of a measuring point through the relation among the total pressure and the static pressure of the shock waves and the Mach number of fluid after the shock waves and the relation among the wind pressure, the static pressure of the shock waves and the Mach number of the shock waves. The measuring method is simple and convenient to operate, the obtained pneumatic pressure is high in accuracy, and the aim of obtaining the pneumatic pressure of an explosion field with high accuracy is fulfilled.
Description
Technical Field
The invention belongs to the technical field of damage assessment, relates to wind pressure, and particularly relates to a method and a device for testing wind pressure in an ammunition explosion field.
Background
With the development of high-energy explosive technology, the explosive power of large-scale warm-pressing and cloud explosion warheads is improved, the damage of wind pressure behind a shock wave front to a target becomes a non-negligible factor, and the measurement of the wind pressure of ammunition explosion becomes an indispensable ring in the evaluation of the explosive power of ammunition.
The pneumatic pressure is generally difficult to directly measure, and the pneumatic pressure is usually obtained by acquiring the total pressure and the static pressure of the shock wave and calculating the difference value of the total pressure and the static pressure. In the industrial field such as airplanes, high-speed rails and other targets, in order to obtain the high-speed airflow velocity and the moving speed around the target, a pitot tube wind pressure measuring method is widely adopted to obtain the total pressure and the static pressure of the airflow, the difference between the total pressure and the static pressure is equal to the wind pressure, and the airflow velocity is indirectly obtained through calculation. In the text of 'wind pressure test and analysis of a certain type bullet explosion field' reported by the test technology, a dynamic pressure test method adopting the combination of two pressure sensors is provided. The main problems of the test method are as follows: due to the pipeline filtering effect of the drainage tube, the measured total pressure of the shock wave is smaller than the actual total pressure of the shock wave, so that a large error of a wind pressure measurement result is introduced; and (II) because the total pressure measuring point and the static pressure measuring point are not at the same position, and the static pressure is arranged behind the total pressure measuring point, the obtained static pressure value is smaller than the static pressure value at the position of the total pressure measuring point, and a large error of a pneumatic pressure measuring result is introduced, so that the pneumatic pressure obtained by the method has large error and low precision, and even the pneumatic pressure is smaller than zero.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method and a device for testing the pneumatic pressure of an ammunition explosion field, and solve the technical problems of large error and low precision of the testing method in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
a pneumatic pressure testing device comprises a pressure measuring rod, wherein a total pressure testing pressure sensor mounting seat is axially arranged on the center of the end surface of a circular truncated cone at the head part of the pressure measuring rod, and a total pressure testing pressure sensor is mounted in the total pressure testing pressure sensor mounting seat;
a side plane is arranged on the side wall of the pressure measuring rod, a plurality of static pressure testing pressure sensor mounting seats are radially arranged on the side plane, and a static pressure testing pressure sensor is mounted in each static pressure testing pressure sensor mounting seat;
the pressure measuring rod opposite to the side plane is provided with a lead groove along the axial direction, and the lead groove is communicated with the total pressure test pressure sensor mounting seat and the static pressure test pressure sensor mounting seats;
the tail part of the pressure measuring rod is provided with a signal output wiring terminal, and the total pressure testing pressure sensor and the static pressure testing pressure sensor are respectively connected with the signal output wiring terminal through leads positioned in the lead grooves.
The invention also has the following technical characteristics:
the static pressure test pressure sensors are arranged at equal intervals, the interval L2 is 30mm, and the distance L1 between the static pressure test pressure sensor closest to the end face of the head circular truncated cone of the pressure measuring rod and the end face of the circular truncated cone of the pressure measuring rod is 80 mm.
The static pressure test pressure sensors are more than three.
After the lead is assembled, the lead groove is filled with epoxy sealant.
The head of the pressure measuring rod is frustum-shaped, and the included angle between the side surface of the frustum and the central axis of the pressure measuring rod is 25 degrees.
The invention also provides a pneumatic pressure testing method for the ammunition explosion field, which adopts the pneumatic pressure testing device;
the method comprises the following steps:
step one, installing a pneumatic pressure testing device in an explosion field:
placing the bracket at an explosion field observation point, and fixing a pressure measuring rod on the bracket to enable the head of the pressure measuring rod to point to the explosion center; recording the distance R between the center of the explosion and the center of the end surface of the head circular truncated cone of the pressure measuring rod;
step two, connecting the pneumatic pressure testing device with a testing instrument:
the signal output connecting terminal is connected with the adapter, and the adapter is connected with the data acquisition instrument; after ammunition explodes, shock waves act on the total pressure testing pressure sensor and the static pressure testing pressure sensors, response signals output by the pressure sensors under pressure are converted and amplified through the adapter and then stored in the data acquisition instrument;
step three, shock wave data processing:
reading and analyzing shock wave pressure signals obtained by data, and recording pressure peak values and positive pressure duration of the total pressure test pressure sensor and the plurality of static pressure test pressure sensors;
the pressure peak value of the total pressure test pressure sensor is the total pressure peak value of the end face of the pressure measuring rod;
step four, calculating the static pressure of the shock wave of the end surface of the pressure measuring rod:
step 401, substituting the pressure peak value of the measuring point on the side plane, the test charging quality and the detonation center distance into a formula I to obtain a plurality of simultaneous solving polynomials to obtain the values of coefficients a, b and c of the formula I; then calculating the static pressure peak value P of the end surface of the pressure measuring rod according to the distance R between the center of burst and the center of the end surface of the head circular truncated cone of the pressure measuring rod and a formula Is；
In the formula:
Psithe static pressure peak value of the side plane of the point i is measured;
i is a measuring point number;
w is the test charging quality;
Rsithe distance between the measuring point i and the explosion center is set;
a. b and c are both coefficients;
step 402, substituting the pressure peak value of the measuring point on the side plane, the test charging quality and the detonation center distance into a formula II to obtain a plurality of ksi+Calculating the average value ks+(ii) a Will ks+Substituting the center distance of the end surface of the pressure measuring rod into a formula II to obtain the static pressure positive pressure action time T of the end surface of the pressure measuring rods+；
Tsi+＝ksi(Rsi×w1/3)1/2Formula II;
in the formula:
ksithe positive pressure time coefficient of the measuring point is obtained;
Tsi+measuring the positive pressure duration of the shock wave;
step 403, substituting the pressure peak values and the positive pressure time of a plurality of measuring points on the side plane into formula III to obtain a plurality of bsiThen, the average value b is obtaineds(ii) a Will Ps、Ts+、bsSubstituting the formula III to obtain a model of the static pressure of the end face of the pressure measuring rod changing along with time;
according to the model that the static pressure of the end surface of the pressure measuring rod changes along with time, the static pressure peak value of the end surface of the pressure measuring rod can be obtained;
step five, calculating the Mach number of the fluid after the static pressure impact of the end surface of the pressure measuring rod:
substituting the total pressure peak value of the end face of the pressure measuring rod and the static pressure peak value of the end face of the pressure measuring rod into a formula IV, and calculating the Mach number M of the fluid after impact;
when the Mach number M is less than or equal to 1, turning to the sixth step;
when the Mach number M is larger than 1, substituting the total pressure peak value and the static pressure peak value into a formula V, recalculating the Mach number M of the fluid after the impact to obtain the Mach number, and then turning to the sixth step;
in the formula:
PPthe total pressure peak value of the end face of the pressure measuring rod is obtained;
Psthe static pressure peak value of the end face of the pressure measuring rod is obtained;
gamma is the specific heat ratio of the explosive gas;
step six, calculating the pneumatic pressure:
substituting the static pressure peak value of the end face of the pressure measuring rod and the Mach number of the fluid motion after impact into a formula VI to obtain a wind pressure peak value q:
step seven, establishing a model of the change of the pneumatic pressure along with the time:
according to the wind power pressure peak value calculation method in the sixth step, the fluid Mach number and the wind power pressure value at each moment are circularly calculated according to the total pressure and the static pressure at each moment, the change curve of the wind power pressure along with time is drawn, and a change model of the wind power pressure along with time is established.
Compared with the prior art, the invention has the following technical effects:
the method comprises the steps of (I) acquiring total pressure and static pressure of shock waves at a measuring point position by adopting a shock wave pressure measuring structure combined by a biaxial multi-sensor, and acquiring wind pressure of a measuring point through the relation among the total pressure and the static pressure of the shock waves and Mach number of fluid after the shock waves and the relation among the wind pressure, the static pressure of the shock waves and the Mach number of the shock wave fluid. The measuring method is simple and convenient to operate, the obtained pneumatic pressure is high in accuracy, and the aim of obtaining the pneumatic pressure of an explosion field with high accuracy is fulfilled.
The invention (II) adopts a plurality of pressure sensors on the side plane of the pressure measuring rod to obtain the static pressure of the measuring point, and obtains the static pressure of the end surface of the pressure measuring rod through data regression.
According to the invention, the change curve of the wind pressure along with time is obtained by a multiple iterative calculation method of the pressure values at the corresponding moments of the total pressure curve and the static pressure curve, so that technical support is provided for comprehensively mastering the attenuation characteristic of the wind pressure in the target damage and damage research.
(IV) in the method, a plurality of pressure sensors are combined to obtain the pressure of the static pressure shock wave, and the static pressure of an observation point is obtained through data processing; the method adopts the end part of the pressure measuring rod to obtain the total pressure of the shock wave; according to the method, a model of the change of the wind pressure along with the time is established through the cyclic calculation of the total pressure of the shock wave and the pressure of each action moment of the static pressure.
Drawings
Fig. 1 is a front sectional structural schematic view of the pneumatic pressure testing device.
Fig. 2 is a left side view structural schematic diagram of the pneumatic pressure testing device.
The meaning of the individual reference symbols in the figures is: the method comprises the following steps of 1-pressure measuring rod, 2-total pressure testing pressure sensor mounting base, 3-total pressure testing pressure sensor, 4-side plane, 5-static pressure testing pressure sensor mounting base, 6-static pressure testing pressure sensor, 7-lead groove, 8-signal output connecting terminal, 9-lead and 10-epoxy sealant.
The present invention will be explained in further detail with reference to examples.
Detailed Description
The present invention is not limited to the following embodiments, and all equivalent changes based on the technical solutions of the present invention fall within the protection scope of the present invention.
Example 1:
the embodiment provides a pneumatic pressure testing device, as shown in fig. 1 and 2, which includes a pressure measuring rod 1, wherein a total pressure testing pressure sensor mounting seat 2 is axially arranged on the center of the end surface of a circular truncated cone at the head part of the pressure measuring rod 1, and a total pressure testing pressure sensor 3 is mounted in the total pressure testing pressure sensor mounting seat 2;
a side plane 4 is arranged on the side wall of the pressure measuring rod 1, a plurality of static pressure test pressure sensor mounting seats 5 are arranged on the side plane 4 along the radial direction, and a static pressure test pressure sensor 6 is arranged in each static pressure test pressure sensor mounting seat 5;
a lead groove 7 is formed in the pressure measuring rod 1 opposite to the side plane 5 along the axial direction, and the lead groove 7 is communicated with the total pressure testing pressure sensor mounting seat 2 and the static pressure testing pressure sensor mounting seats 5;
the tail part of the pressure measuring rod 1 is provided with a signal output wiring terminal 8, and the total pressure testing pressure sensor 3 and the static pressure testing pressure sensor 6 are respectively connected with the signal output wiring terminal 8 through a lead 9 positioned in a lead groove 7.
In this embodiment, the total pressure test pressure sensor 3 is used to obtain the total pressure of the shock wave. And the static pressure test pressure sensor 6 is used for acquiring the static pressure of the shock wave at the position of the measuring point.
As a preferable mode of the present embodiment, the static pressure test pressure sensors 6 are arranged at equal intervals, the interval L2 is 30mm, and the distance L1 from the circular truncated cone end face of the pressure measuring rod 1 to the static pressure test pressure sensor 6 closest to the circular truncated cone end face of the head of the pressure measuring rod 1 is 80 mm.
As a preferable aspect of the present embodiment, the number of the static pressure test pressure sensors 6 is three or more, and in the present embodiment, three are preferable.
In a preferred embodiment of the present invention, after the lead 9 is assembled, the lead groove 7 is filled with an epoxy sealant 10.
As a preferable scheme of this embodiment, the head of the pressure measuring bar 1 is frustum-shaped, and an included angle between a side surface of the frustum and the central axis of the pressure measuring bar 1 is 25 °.
Example 2:
the embodiment provides a pneumatic pressure testing method for an ammunition explosion field, which adopts the pneumatic pressure testing device in embodiment 1;
in this embodiment, the end surface of the pressure measuring rod 1 is the circular truncated cone end surface of the head of the pressure measuring rod 1.
The method comprises the following steps:
step one, installing a pneumatic pressure testing device in an explosion field:
placing the bracket at an explosion field observation point, and fixing a pressure measuring rod 1 on the bracket to enable the head of the pressure measuring rod 1 to point to the explosion center; recording the distance R between the center of the explosion and the center of the end surface of the head circular truncated cone of the pressure measuring rod 1;
step two, connecting the pneumatic pressure testing device with a testing instrument:
the signal output connecting terminal 8 is connected with an adapter, and the adapter is connected with a data acquisition instrument; after ammunition explodes, shock waves act on the total pressure testing pressure sensor 3 and the plurality of static pressure testing pressure sensors 6, response signals output by the pressure sensors are converted and amplified through the adapter, and then are stored in the data acquisition instrument;
step three, shock wave data processing:
reading and analyzing shock wave pressure signals obtained by data, and recording pressure peak values and positive pressure duration of the total pressure test pressure sensor 3 and the plurality of static pressure test pressure sensors 6;
the pressure peak value of the total pressure test pressure sensor 3 is the total pressure peak value of the end surface of the pressure measuring rod 1;
step four, calculating the static pressure of the shock wave of the end surface of the pressure measuring rod:
step 401, substituting the pressure peak value of the measuring point on the side plane 4, the test charging quality and the detonation center distance into a formula I to obtain a plurality of simultaneous solving polynomials to obtain the values of coefficients a, b and c of the formula I; then, calculating the static pressure peak value P of the end surface of the pressure measuring rod 1 according to the distance R between the center of burst and the center of the end surface of the head circular truncated cone of the pressure measuring rod 1 and a formula Is；
In the formula:
Psithe static pressure peak value of the side plane of the point i is measured;
i is a measuring point number;
w is the test charging quality;
Rsithe distance between the measuring point i and the explosion center is set;
a. b and c are both coefficients;
in this example, Rs1＝R+L1,Rs2＝Rs1+L2，Rs3＝Rs2+L2。
Step 402, substituting the pressure peak value of the measuring point on the side plane 4, the test charging quality and the explosive center distance into a formula II to obtain a plurality of ksi+Calculating the average value ks+(ii) a Will ks+Substituting the center distance of the end face of the pressure measuring rod 1 into a formula II to obtain the end face static pressure positive pressure action time T of the pressure measuring rods+；
Tsi+＝ksi(Rsi×w1/3)1/2Formula II;
in the formula:
ksithe positive pressure time coefficient of the measuring point is obtained;
Tsi+measuring the positive pressure duration of the shock wave;
step 403, substituting the pressure peak values and positive pressure time of a plurality of measuring points on the side plane 4 into formula III to obtain a plurality of bsiThen, the average value b is obtaineds(ii) a Will Ps、Ts+、bsSubstituting the formula III to obtain a model of the static pressure of the end surface of the pressure measuring rod 1 changing along with time;
according to the model that the static pressure of the end surface of the pressure measuring rod 1 changes along with the time, the static pressure peak value of the end surface of the pressure measuring rod can be obtained;
step five, calculating the Mach number of the fluid after the static pressure impact of the end surface of the pressure measuring rod:
substituting the total pressure peak value of the end face of the pressure measuring rod and the static pressure peak value of the end face of the pressure measuring rod into a formula IV, and calculating the Mach number M of the fluid after impact;
when the Mach number M is less than or equal to 1, turning to the sixth step;
when the Mach number M is larger than 1, substituting the total pressure peak value and the static pressure peak value into a formula V, recalculating the Mach number M of the fluid after the impact to obtain the Mach number, and then turning to the sixth step;
in the formula:
PPthe total pressure peak value of the end face of the pressure measuring rod is obtained;
Psthe static pressure peak value of the end face of the pressure measuring rod is obtained;
gamma is the specific heat ratio of the explosive gas; in this embodiment, γ is 1.4.
Step six, calculating the pneumatic pressure:
substituting the static pressure peak value of the end surface of the pressure measuring rod 2 and the Mach number of the fluid motion after impact into a formula VI to obtain a wind pressure peak value q:
step seven, establishing a model of the change of the pneumatic pressure along with the time:
according to the wind power pressure peak value calculation method in the sixth step, the fluid Mach number and the wind power pressure value at each moment are circularly calculated according to the total pressure and the static pressure at each moment, the change curve of the wind power pressure along with time is drawn, and a change model of the wind power pressure along with time is established.
Application example:
according to the method for testing the pneumatic pressure of the ammunition explosion field in the embodiment 2, the following is the test measurement result of a certain charging target field obtained by using the pressure measuring rod. The mass of a certain charge is tested to be 10kg, and the center of burst distance of the end surface of the pressure measuring rod is 14 m. Table 1 shows the data processing results after the test. As is clear from Table 1, the total pressure at the end face was measured to be 0.458MPa, the static pressure at the end face was measured to be 0.2142MPa, and the wind pressure was measured to be 0.181 MPa. By adopting the total pressure test method of the drainage tube, the pressure peak value is certainly less than 0.458MPa, so that the wind pressure is also reduced, and if the filtering effect is strong, a negative result may occur.
TABLE 1 Total pressure shock wave and static pressure shock wave data processing results
Claims (10)
1. A pneumatic pressure testing method for an ammunition explosion field adopts a pneumatic pressure testing device, and is characterized in that the pneumatic pressure testing device comprises a pressure measuring rod (1), a total pressure testing pressure sensor mounting seat (2) is axially arranged on the center of the end surface of a circular truncated cone at the head part of the pressure measuring rod (1), and a total pressure testing pressure sensor (3) is mounted in the total pressure testing pressure sensor mounting seat (2);
a side plane (4) is arranged on the side wall of the pressure measuring rod (1), a plurality of static pressure test pressure sensor mounting seats (5) are arranged on the side plane (4) along the radial direction, and a static pressure test pressure sensor (6) is arranged in each static pressure test pressure sensor mounting seat (5);
a lead groove (7) is formed in the pressure measuring rod (1) opposite to the side plane (5) along the axial direction, and the lead groove (7) is communicated with the total pressure test pressure sensor mounting seat (2) and the static pressure test pressure sensor mounting seats (5);
the tail part of the pressure measuring rod (1) is provided with a signal output connecting terminal (8), and the total pressure testing pressure sensor (3) and the static pressure testing pressure sensor (6) are respectively connected with the signal output connecting terminal (8) through a lead (9) positioned in a lead groove (7);
the method comprises the following steps:
step one, installing a pneumatic pressure testing device in an explosion field:
placing the bracket at an explosion field observation point, and fixing a pressure measuring rod (1) on the bracket to enable the head of the pressure measuring rod (1) to point to the explosion center; recording the center of the explosion and the center of the end surface of the head circular table of the pressure measuring rod (1);
step two, connecting the pneumatic pressure testing device with a testing instrument:
the device is connected with an adapter through a signal output wiring terminal (8), and the adapter is connected with a data acquisition instrument; after ammunition explodes, shock waves act on the total pressure testing pressure sensor (3) and the plurality of static pressure testing pressure sensors (6), response signals output by the pressure sensors under the pressure are converted and amplified through the adapter and then stored in the data acquisition instrument;
step three, shock wave data processing:
reading and analyzing shock wave pressure signals obtained by data, and recording pressure peak values and positive pressure duration of the total pressure test pressure sensor (3) and the plurality of static pressure test pressure sensors (6);
the pressure peak value of the total pressure test pressure sensor (3) is the total pressure peak value of the end surface of the pressure test rod (1);
step four, calculating the static pressure of the shock wave of the end surface of the pressure measuring rod:
step 401, substituting the pressure peak value of the measuring point on the side plane (4), the test charging quality and the detonation center distance into a formula I to obtain a plurality of simultaneous solving polynomials, and obtaining the values of coefficients a, b and c of the formula I; then, calculating the static pressure peak value P of the end surface of the pressure measuring rod (1) according to the distance R between the center of burst and the center of the end surface of the head circular table of the pressure measuring rod (1) and a formula Is；
In the formula:
Psithe static pressure peak value of the side plane of the point i is measured;
i is a measuring point number;
w is the test charging quality;
Rsithe distance between the measuring point i and the explosion center is set;
a. b and c are both coefficients;
step 402, substituting the pressure peak value of the upper measuring point of the side plane (4), the test charging quality and the explosive center distance into a formula II to obtain a plurality of ksi+Calculating the average value ks+(ii) a Will ks+Substituting the center of the end face center of the pressure measuring rod (1) into a formula II to obtain the pressure measuring rod end face static pressure positive pressure action time Ts+；
Tsi+＝ksi(Rsi×w1/3)1/2Formula II;
in the formula:
ksithe positive pressure time coefficient of the measuring point is obtained;
Tsi+measuring the positive pressure duration of the shock wave;
step 403, substituting the pressure peak values and the positive pressure time of a plurality of measuring points on the side plane (4) into a formula III to obtain a plurality of bsiThen, the average value b is obtaineds(ii) a Will Ps、Ts+、bsSubstituting the formula III to obtain a model of the static pressure of the end surface of the pressure measuring rod (1) changing along with time;
according to the model that the static pressure of the end surface of the pressure measuring rod (1) changes along with time, the static pressure peak value of the end surface of the pressure measuring rod can be obtained;
step five, calculating the Mach number of the fluid after the static pressure impact of the end surface of the pressure measuring rod:
substituting the total pressure peak value of the end face of the pressure measuring rod and the static pressure peak value of the end face of the pressure measuring rod into a formula IV, and calculating the Mach number M of the fluid after impact;
when the Mach number M is less than or equal to 1, turning to the sixth step;
when the Mach number M is larger than 1, substituting the total pressure peak value and the static pressure peak value into a formula V, recalculating the Mach number M of the fluid after the impact to obtain the Mach number, and then turning to the sixth step;
in the formula:
PPthe total pressure peak value of the end face of the pressure measuring rod is obtained;
Psthe static pressure peak value of the end face of the pressure measuring rod is obtained;
gamma is the specific heat ratio of the explosive gas;
step six, calculating the pneumatic pressure:
substituting the static pressure peak value of the end surface of the pressure measuring rod (2) and the Mach number of fluid motion after impact into a formula VI to obtain a wind pressure peak value q:
step seven, establishing a model of the change of the pneumatic pressure along with the time:
according to the wind power pressure peak value calculation method in the sixth step, the fluid Mach number and the wind power pressure value at each moment are circularly calculated according to the total pressure and the static pressure at each moment, the change curve of the wind power pressure along with time is drawn, and a change model of the wind power pressure along with time is established.
2. The method for testing the pneumatic pressure of the ammunition explosion field according to claim 1, wherein the static pressure testing pressure sensors (6) are arranged at equal intervals, the interval L2 is 30mm, and the distance L1 between the static pressure testing pressure sensor (6) closest to the circular truncated cone end surface of the head part of the pressure measuring rod (1) and the circular truncated cone end surface of the pressure measuring rod (1) is 80 mm.
3. The ammunition explosion field pneumatic pressure test method according to claim 1, characterized in that the number of the static pressure test pressure sensors (6) is more than three.
4. The ammunition explosion field pneumatic pressure test method according to claim 1, characterized in that after the lead (9) is assembled, the lead groove (7) is filled with epoxy sealant (10).
5. The ammunition explosion field pneumatic pressure test method according to claim 1, characterized in that the head of the pressure measuring rod (1) is frustum-shaped, and the included angle between the side surface of the frustum and the central axis of the pressure measuring rod (1) is 25 degrees.
6. The pneumatic pressure testing device is characterized by comprising a pressure measuring rod (1), wherein a total pressure testing pressure sensor mounting seat (2) is axially arranged in the center of the end surface of a circular truncated cone at the head part of the pressure measuring rod (1), and a total pressure testing pressure sensor (3) is mounted in the total pressure testing pressure sensor mounting seat (2);
a side plane (4) is arranged on the side wall of the pressure measuring rod (1), a plurality of static pressure test pressure sensor mounting seats (5) are arranged on the side plane (4) along the radial direction, and a static pressure test pressure sensor (6) is arranged in each static pressure test pressure sensor mounting seat (5);
a lead groove (7) is formed in the pressure measuring rod (1) opposite to the side plane (5) along the axial direction, and the lead groove (7) is communicated with the total pressure test pressure sensor mounting seat (2) and the static pressure test pressure sensor mounting seats (5);
the tail of the pressure measuring rod (1) is provided with a signal output connecting terminal (8), and the total pressure testing pressure sensor (3) and the static pressure testing pressure sensor (6) are respectively connected with the signal output connecting terminal (8) through a lead (9) positioned in a lead groove (7).
7. The pneumatic pressure testing device as claimed in claim 6, wherein the static pressure testing pressure sensors (6) are arranged at equal intervals, the interval L2 is 30mm, and the distance L1 between the static pressure testing pressure sensor (6) closest to the circular truncated cone end face of the head of the pressure measuring rod (1) and the circular truncated cone end face of the pressure measuring rod (1) is 80 mm.
8. A pneumatic pressure testing device according to claim 6, characterized in that the number of said hydrostatic testing pressure sensors (6) is more than three.
9. The pneumatic pressure testing device according to claim 6, wherein after the lead wires (9) are assembled, the lead wire grooves (7) are filled with epoxy sealant (10).
10. The pneumatic compression testing device according to claim 6, wherein the head of the compression testing rod (1) is frustum-shaped, and the included angle between the side surface of the frustum and the central axis of the compression testing rod (1) is 25 °.
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Cited By (2)
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