CN114001903A - Displacement response measuring device and measuring method under impact environment - Google Patents
Displacement response measuring device and measuring method under impact environment Download PDFInfo
- Publication number
- CN114001903A CN114001903A CN202111391306.0A CN202111391306A CN114001903A CN 114001903 A CN114001903 A CN 114001903A CN 202111391306 A CN202111391306 A CN 202111391306A CN 114001903 A CN114001903 A CN 114001903A
- Authority
- CN
- China
- Prior art keywords
- angle sensor
- displacement
- sensor
- displacement response
- measuring device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/004—Measuring arrangements characterised by the use of mechanical techniques for measuring coordinates of points
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
The invention relates to a displacement response measuring device and a measuring method under an impact environment, wherein two ends of a base of the device are connected with an X-direction rotating frame through X-direction rotating shaft bearings, an X-direction angle sensor is clamped on the X-direction rotating shaft, the X-direction angle sensor is fixedly used on the base, the X-direction rotating frame bearings are connected with a Z-direction rotating shaft, one end part of the Z-direction rotating shaft is clamped with a Z-direction angle sensor, the Z-direction angle sensor is fixedly arranged on the X-direction rotating frame, a Z-direction rotating block is connected on the Z-direction rotating shaft, a telescopic displacement sensor is connected on the Z-direction rotating block, and the end part of the telescopic displacement sensor is connected with a connector. The measuring method is that the position of the measuring point when the measuring point is not impacted is recorded; when the measuring point is impacted, the numerical values of the telescopic displacement sensor, the Z-direction angle sensor and the X-direction angle sensor at each data acquisition moment in the process are recorded, and the displacement response of the measuring point is obtained through a displacement response model. The invention solves the problems of inconvenient installation, large measurement error and the like of the existing measurement method.
Description
Technical Field
The invention relates to an impact measurement technology, in particular to a displacement response measurement device and a measurement method in an impact environment.
Background
The impact is widely applied to the relevant fields of aerospace, ships, automobiles and the like, so that the response of relevant equipment or parts after the impact is received by the technical personnel in the fields is very concerned, so that the influence of the impact on the equipment or parts is specifically solved through the impact response. The displacement response is one of the very important parameters in the impulse response.
A spatial point can be represented by X, Y, Z coordinates in three directions, so the measurement of the impact displacement response of a point in space usually uses three displacement sensors to measure X, Y, Z displacement changes in three directions within a sampling time, and obtains the displacement response of the point. The measuring method has simple structure and intuitive displacement response data, but the X, Y-direction sensor for measuring horizontal displacement must be at the same horizontal height with the measured point, and the sensor is inconvenient to install at any point of the measuring space; in addition, the sensors in three directions are manually installed, so that the measurement error is increased. In patent CN109341506B, a three-way displacement measuring device is proposed, which uses three sets of bases, telescopic rods and three sets of displacement measuring modules to collect displacement measurements in three directions, and connects a measured point with the telescopic rods, and the displacement of the measured point can be obtained through the displacement measuring modules. Because the three directions are mutually perpendicular, when the measuring device is initially used, the telescopic rod is positioned at the central position of the largest base and is perpendicular to the plane of the base, and in order to enable the measured point to be connected with the telescopic rod, enough space must be reserved between the measuring device and the measured point, and the measured point can be positioned right above the telescopic rod. The use of the device has additional requirements on the installation position, and is inconvenient and flexible. In addition, the strain measurement module measures the deformation of the elastic sheet caused by the pulling of the spring to obtain a displacement value, and due to the additional increase of the spring force, the accuracy of the displacement value of the measured point is interfered.
Disclosure of Invention
The purpose of the invention is as follows: the invention provides a displacement response measuring device and a measuring method under an impact working condition, and aims to solve the problems that an existing measuring method is inconvenient to install, large in measuring error and the like.
The technical scheme is as follows:
the utility model provides a displacement response measuring device under impact environment, the device's base both ends are connected with X through X to the rotation axis bearing and are to the swivel mount, X has X to angle sensor to the rotation axis joint, X is used for on the base to angle sensor is fixed, X connects Z to the rotation axis to the swivel mount bearing, Z has Z to angle sensor to a rotation axis tip joint, Z is fixed in X to the swivel mount to angle sensor, Z is connected with Z to rotatory piece on to the rotation axis, Z is connected with flexible displacement sensor on to rotatory piece, flexible displacement sensor end connection has the connector.
Furthermore, the X is to the swivel mount for cuboid hollow structure, has seted up the shaft hole at long edge direction's both ends, has seted up Z at the both ends of minor face direction and has seted up to the dead eye.
Furthermore, Z is to the rotation axis for the step shaft structure, and there is the round pin shaft hole in the centre, and the one end of minor diameter is equipped with first plane, first plane and Z to angle sensor joint.
Furthermore, the X-direction rotating shaft is clamped with the X-direction angle sensor through a second plane of the connecting pin.
Further, the connecting head
One end is set as a joint bearing, the other end is set as a threaded hole, the threaded hole is fixedly connected with the end part of the telescopic displacement sensor, and the joint bearing is used for connecting a tested piece.
A measuring method of a displacement response measuring device under an impact environment,
s1: setting the base, the X-direction rotating frame to be in a horizontal position, and setting the telescopic displacement sensor to be in an initial position when the telescopic displacement sensor is vertically and completely retracted;
s2: the base is fixed on the installation basis of the tested equipment, the connector is connected with the measuring point of the tested equipment, the numerical values of the telescopic displacement sensor, the Z-direction angle sensor and the X-direction angle sensor at the moment are recorded, and the position of the measuring point of the tested equipment when the measuring point is not impacted is obtained;
s3: when the tested device is impacted, the measuring point can generate space displacement, the numerical values of the telescopic displacement sensor, the Z-direction angle sensor and the X-direction angle sensor at each data acquisition moment in the process are recorded, and the displacement response of the measuring point is obtained through a displacement response model.
Further, the displacement response model is:
the initial position O can be expressed as:
P＝[0 0 0 1]
the conversion matrix of m extending in the Y axis direction, alpha rotating around the X axis and beta rotating around the Z axis is as follows:
the position a of the connecting head can be expressed as:
P'＝PT＝[-mcosαsinβ mcosαcosβ msinα 1]
in the formula, m, alpha and beta are respectively measured by a telescopic displacement sensor, an X-direction angle sensor and a Z-direction angle sensor, and the rotating angles alpha and beta are positive anticlockwise and negative clockwise.
Has the advantages that:
(1) the displacement response measuring device under the impact working condition is small in size, convenient to install and capable of being connected with any point of the tested equipment;
(2) according to the displacement response measuring device under the impact working condition, the sensors are integrally arranged, external force interference is avoided, and the measuring precision is high;
(3) the displacement response measuring device under the impact working condition is simple in structure and convenient to process and manufacture.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a cross-sectional view of the invention taken along the axis of the member 3;
FIG. 3 is a cross-sectional view of the invention taken along the axis of member 7;
FIG. 4 is a block diagram of the part 1;
FIG. 5 is a block diagram of the part 2;
FIG. 6 is a block diagram of the part 3;
FIG. 7 is a block diagram of member 6;
FIG. 8 is a block diagram of the part 7;
FIG. 9 is a block diagram of the member 10;
reference numerals:
1. the device comprises a base, 1-1 vertical plate, 1-2X-direction bearing holes, 2. X-direction rotating frames, 2-1 shaft holes, 2-2Z-direction bearing holes, 3. Z-direction rotating shafts, 3-1 pin shaft holes, 3-2 first planes, 4. Z-direction rotating blocks, 5 telescopic displacement sensors, 6 connectors, 7. X-direction rotating shafts, 7-1 large-diameter ends, 7-2 small-diameter ends, 7-3 connecting pin holes, 8. Z-direction angle sensors, 9. X-direction angle sensors, 10 connecting pins, 10-1 cylindrical ends, 10-2 second planes, 11. pin shafts, 12. Z-direction bearings and 13. X-direction bearings.
Detailed Description
The invention is described in more detail below with reference to the accompanying drawings.
As shown in fig. 1 to 3, a displacement response measuring device in an impact environment according to the present invention includes: the device comprises a base 1, an X-direction rotating frame 2, a Z-direction rotating shaft 3, a Z-direction rotating block 4, a telescopic displacement sensor 5, a connector 6, an X-direction rotating shaft 7, a Z-direction angle sensor 8, an X-direction angle sensor 9, a connecting pin 10, a pin shaft 11, an X-direction bearing 12 and a Z-direction bearing 13.
As shown in fig. 4, the base 1 is an inverted "n" shaped structure, two ends of a bottom plate of the base are fixedly provided with vertical plates 1-1, and the vertical plates 1-1 are provided with bearing holes 1-2.
As shown in FIG. 5, the X-direction rotating frame 2 is a rectangular hollow structure, two ends in the long side direction are provided with shaft holes 2-1, and two ends in the short side direction are provided with Z-direction bearing holes 2-2.
As shown in FIG. 6, the Z-axis rotating shaft 3 has a stepped shaft structure, a pin shaft hole 3-1 is formed in the middle, and a first plane 3-2 is formed at one end with a smaller diameter, so that the cross section of the end is an incomplete circle.
As shown in fig. 2, Z-bearings 12 are mounted on both ends of the Z-axis rotating shaft 3, and the Z-bearings 12 are mounted in the Z-axis bearing holes 2-2 of the X-axis rotating frame 2. The Z-direction angle sensor 8 is fixed on the outer surface of the long side of the X-direction rotating frame 2, and the shape of a center hole of the Z-direction angle sensor 8 is the same as the shape of the cross section of the first plane 3-2 end of the Z-direction rotating shaft 3, so that the first plane 3-2 end of the Z-direction rotating shaft 3 can be matched with the center hole of the Z-direction angle sensor 8, and the internal angle metering mechanism of the Z-direction angle sensor 8 is driven to rotate through the first plane 3-2. The Z-direction rotation block 4 is installed at a middle position of the Z-direction rotation shaft 3. As shown in fig. 3, the pin 11 connects the Z-axis rotation 3 and the Z-axis rotation block 4, and the telescopic displacement sensor 5 is mounted on the Z-axis rotation block 4.
As shown in fig. 7, the connection head 6 is provided with a joint bearing 6-1 and a threaded hole 6-2. Because the joint bearing 6-1 can swing within a certain range, the connecting head 6 is arbitrarily connected with the tested piece within the allowed swing range of the joint bearing. The connector 6 is mounted at the end of the telescopic displacement sensor 5 through the threaded hole 6-2.
As shown in FIG. 8, the X-axis 7 is a cylindrical structure with a large diameter end 7-1, a small diameter end 7-2, and a connecting pin hole 7-3.
As shown in fig. 9, the connecting pin 10 has a rod-like structure having a cylindrical end 10-1 and a second plane 10-2, and the end having the second plane 10-2 has a cross section of an incomplete circle.
As shown in FIG. 3, the large diameter end 7-1 of the X-direction rotating shaft 7 is installed in the shaft hole 2-1 of the X-direction rotating frame 2 by a screw, and the small diameter end 7-2 is installed with an X-direction bearing 13. The X-direction bearing 13 is arranged in a bearing hole 1-2 of the base 1. The X-direction angle sensor 9 is installed on the outer surface of a vertical plate 1-1 of the base 1, the shape of a central hole of the X-direction angle sensor 9 is the same as the cross section shape of a second plane 10-2 end of the connecting pin 10, a cylindrical end 10-1 of the connecting pin 10 is installed in the connecting pin hole 7-3, the second plane 10-2 end can be matched with the central hole of the X-direction angle sensor 9, and the X-direction rotating shaft 7 drives the internal angle metering mechanism of the X-direction angle sensor 9 to rotate through the second plane 10-2 of the connecting pin 10.
Further illustrating the measuring method of the present invention under impact conditions,
the invention relates to a displacement response measuring device under an impact environment, which can set a base 1 and an X-direction rotating frame 2 to be in horizontal positions, and a telescopic displacement sensor 5 is in an initial position when being vertically and completely retracted. The device is fixed on the installation basis of the tested equipment through the base 1, the connector 6 is connected with the measuring point of the tested equipment, at the moment, the telescopic displacement sensor 5 extends, the Z-direction rotating block 4 and the Z-direction rotating shaft 3 rotate, and then the Z-direction angle sensor 8 generates an angle value; the X-direction rotating frame 2 and the X-direction rotating shaft 7 rotate, and the X-direction angle sensor 9 generates an angle value. And (3) recording the numerical values of the telescopic displacement sensor 5, the Z-direction angle sensor 8 and the X-direction angle sensor 9 at the moment by using data acquisition equipment, namely obtaining the position of the measuring point of the tested equipment when the tested equipment is not impacted. When the tested equipment is impacted, the tested equipment generates spatial displacement due to self deformation or the vibration damping effect of the vibration isolator, and the telescopic displacement sensor 5 continuously extends and shortens relative to the tested equipment when the tested equipment is not impacted in the impact process; the Z-direction rotating block 4 and the Z-direction rotating shaft 3 continuously rotate, so that the Z-direction angle sensor 8 generates a variable angle value; the X-direction rotating frame 2 and the X-direction rotating shaft 7 are rotated continuously, and the X-direction angle sensor 9 generates a changing angle value. The data acquisition equipment records the numerical values of the telescopic displacement sensor 5, the Z-direction angle sensor 8 and the X-direction angle sensor 9 at each data acquisition moment in the process, and the displacement response of each data acquisition moment and a measuring point in the impact process can be obtained through data analysis.
The specific calculation method of the displacement response model is as follows, as shown in fig. 1, at this time, the position a of the connecting head 6 is the position where the connecting head 6 is connected with the measured point when the measured device is not impacted. The position a changes from the initial position O, i.e., the position in which the base 1 and the X-direction rotating frame 2 are in the horizontal position and the telescopic displacement sensor 5 is vertically and fully retracted, as follows: the position a of the connecting head 6 at this time can be obtained by extending m in the Y-axis direction, rotating α around the X-axis, and rotating β around the Z-axis according to the following matrix equation:
the initial position O can be expressed as:
P＝[0 0 0 1]
the conversion matrix of m extending in the Y axis direction, alpha rotating around the X axis and beta rotating around the Z axis is as follows:
position a can be expressed as:
P'＝PT＝[-mcosαsinβ mcosαcosβ msinα 1]
in the formula, m, alpha and beta are respectively measured by a telescopic displacement sensor, an X-direction angle sensor and a Z-direction angle sensor, and the rotating angles alpha and beta are positive anticlockwise and negative clockwise.
Similarly, the coordinates of each data sampling time point a in the impact process relative to the initial position can be obtained through the matrix calculation formula, that is, the displacement response of the measurement point under the impact condition.
The invention relates to a displacement response measuring device under an impact environment, which skillfully uses an angle sensor to convert the displacement in the horizontal direction into a rotating angle, and converts acquired data into data expressed by a rectangular coordinate system which is easy to understand through a conversion matrix.
The data acquisition equipment and the sensors mentioned in the above embodiments are existing equipment.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the above embodiments, it will be understood by those of ordinary skill in the art that: modifications are made to the technical solutions described in the above embodiments, or some or all of the technical features are equivalently replaced, without departing from the scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. A displacement response measuring device under impact environment is characterized in that: the device's base (1) both ends are connected with X through X to rotation axis (7) bearing to swivel mount (2), X has X to angle sensor (9) to rotation axis (7) joint, X is used for on base (1) to angle sensor (9) fixed, Z is to rotation axis (3) to swivel mount (2) bearing connection, Z is to rotation axis (3) a tip joint has Z to angle sensor (8), Z is fixed in on X to swivel mount (2) to angle sensor (8), Z is connected with Z on rotation axis (3) to rotatory piece (4), Z is connected with flexible displacement sensor (5) on rotatory piece (4), flexible displacement sensor (5) end connection has connector (6).
2. The displacement response measuring device under impact environment of claim 1, characterized in that: the X-direction rotating frame (2) is of a cuboid hollow structure, shaft holes (2-1) are formed in two ends in the long edge direction, and Z-direction bearing holes (2-2) are formed in two ends in the short edge direction.
3. The displacement response measuring device under impact environment of claim 1, characterized in that: the Z-direction rotating shaft (3) is of a stepped shaft structure, a pin shaft hole (3-1) is formed in the middle of the Z-direction rotating shaft, a first plane (3-2) is arranged at one end with a smaller diameter, and the first plane (3-2) is clamped with the Z-direction angle sensor (8).
4. The displacement response measuring device under impact environment of claim 1, characterized in that: the X-direction rotating shaft (7) is clamped with the X-direction angle sensor (9) through a second plane (10-2) of the connecting pin (10).
5. The displacement response measuring device under impact environment of claim 1, characterized in that: one end of the connector (6) is provided with a joint bearing (6-1), the other end of the connector is provided with a threaded hole (6-2), the threaded hole (6-2) is fixedly connected with the end part of the telescopic displacement sensor (5), and the joint bearing (6-1) is used for connecting a tested piece.
6. A measuring method of a displacement response measuring device under an impact environment according to claim 1, characterized in that:
s1: setting the base (1) and the X-direction rotating frame (2) to be in horizontal positions, and setting the telescopic displacement sensor (5) to be in an initial position when the telescopic displacement sensor is vertically and completely retracted;
s2: the base (1) is fixed on the installation basis of the tested equipment, the connector (6) is connected with the measuring point of the tested equipment, the numerical values of the telescopic displacement sensor (5), the Z-direction angle sensor (8) and the X-direction angle sensor (9) at the moment are recorded, and the position of the measuring point of the tested equipment when the measuring point is not impacted is obtained;
s3: when the tested equipment is impacted, the measuring point can generate space displacement, the numerical values of the telescopic displacement sensor (5), the Z-direction angle sensor (8) and the X-direction angle sensor (9) at each data acquisition moment in the process are recorded, and the displacement response of the measuring point is obtained through a displacement response model.
7. The method for measuring the displacement response measuring device under the impact environment according to claim 6, wherein: the displacement response model is:
the initial position O can be expressed as:
P＝[0 0 0 1]
the conversion matrix of m extending in the Y axis direction, alpha rotating around the X axis and beta rotating around the Z axis is as follows:
the position a of the connection head (6) can be expressed as:
P'＝PT＝[-mcosαsinβ mcosαcosβ msinα 1]
in the formula, m, alpha and beta are respectively measured by a telescopic displacement sensor (5), an X-direction angle sensor (9) and a Z-direction angle sensor (8), and the rotating angles alpha and beta are positive anticlockwise and negative clockwise.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111391306.0A CN114001903A (en) | 2021-11-23 | 2021-11-23 | Displacement response measuring device and measuring method under impact environment |
| NL2033377A NL2033377B1 (en) | 2021-11-23 | 2022-10-23 | Displacement response measuring device and measuring method under impact environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111391306.0A CN114001903A (en) | 2021-11-23 | 2021-11-23 | Displacement response measuring device and measuring method under impact environment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114001903A true CN114001903A (en) | 2022-02-01 |
Family
ID=79929874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111391306.0A Pending CN114001903A (en) | 2021-11-23 | 2021-11-23 | Displacement response measuring device and measuring method under impact environment |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN114001903A (en) |
| NL (1) | NL2033377B1 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2945863B1 (en) * | 2009-05-19 | 2011-12-23 | Celette Sa | THREE-DIMENSIONAL MEASURING DEVICE |
| ES2826775T3 (en) * | 2015-07-15 | 2021-05-19 | Kistler Holding Ag | Deformation sensor of a body and application of such a deformation sensor of a body |
| CN105403182A (en) * | 2015-12-13 | 2016-03-16 | 内蒙古北方重工业集团有限公司 | Spatial position coordinate real-time measuring device |
| US10571239B2 (en) * | 2016-11-30 | 2020-02-25 | Teruko ISHIKAWA | Displacement measuring device |
| CN109341506B (en) | 2018-11-16 | 2020-01-14 | 武汉理工大学 | Three-dimensional displacement measuring device |
-
2021
- 2021-11-23 CN CN202111391306.0A patent/CN114001903A/en active Pending
-
2022
- 2022-10-23 NL NL2033377A patent/NL2033377B1/en active
Also Published As
| Publication number | Publication date |
|---|---|
| NL2033377B1 (en) | 2023-11-16 |
| NL2033377A (en) | 2023-06-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209910944U (en) | Wind tunnel balance force test preparation device | |
| CN106940243B (en) | Six-component measuring balance and model for wind tunnel experiment | |
| CN102519635B (en) | Triaxial force sensor with overload protection function | |
| CN216410592U (en) | Displacement response measuring device under impact environment | |
| CN114001903A (en) | Displacement response measuring device and measuring method under impact environment | |
| CN107843206B (en) | Bridge pier curvature displacement testing device and method | |
| CN102628679B (en) | Roll bending forming curvature radius measuring device of plate coiling machine | |
| CN201844897U (en) | Digital 0.1-level tension and compression integrated standard dynamometer | |
| CN211262076U (en) | Inner diameter measuring device | |
| CN210089996U (en) | Compliant hinge flexibility and rotation precision measuring device based on micro-vision system | |
| CN218698994U (en) | Mechanical arm calibration and motion precision detection assembly | |
| CN112178466A (en) | Pipeline outside gas leakage detection device | |
| CN113252094B (en) | Sensor performance detection device | |
| CN202582508U (en) | Device for measuring roll bending machine roll bending forming curvature radius | |
| CN110125980B (en) | Calibration device and calibration method for industrial robot repeated positioning precision measurement device | |
| CN114993162A (en) | Device and method for measuring circumferential strain and axial stress of grouting material | |
| CN211784061U (en) | Portable on-line measurement and calibration device for shaft power | |
| CN110757509B (en) | Device and method for measuring lateral rigidity of rotary joint of robot | |
| CN110733060A (en) | mechanical arm tail end space repeated positioning precision measuring device and method | |
| CN203350018U (en) | Device for adjusting posture of camera | |
| CN214537723U (en) | Angular contact ball bearing protrusion measuring instrument | |
| CN116659397B (en) | Experimental platform and method for measuring state deviation of power transmission wire under strong wind | |
| CN116929702B (en) | Aerodynamics test balance device and test method for aircraft | |
| CN218955719U (en) | Automatic three-coordinate measuring device | |
| CN115165552A (en) | Radial displacement measuring mechanism and method for composite material cylindrical pressure-resistant shell |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |