CN114970219A - Flexible connection acceleration sensor data acquisition method and system - Google Patents
Flexible connection acceleration sensor data acquisition method and system Download PDFInfo
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- CN114970219A CN114970219A CN202210913898.6A CN202210913898A CN114970219A CN 114970219 A CN114970219 A CN 114970219A CN 202210913898 A CN202210913898 A CN 202210913898A CN 114970219 A CN114970219 A CN 114970219A
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- G06F30/20—Design optimisation, verification or simulation
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
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- G01M7/00—Vibration-testing of structures; Shock-testing of structures
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Abstract
The invention relates to the technical field of sensor data acquisition, and discloses a method and a system for acquiring data of a flexibly connected acceleration sensor. If the difference is not consistent, the weaving process is changed until the fixed weaving method of the sensor meets the requirement of acceleration acquisition; the acceleration sensor is installed on the vehicle ceiling by using a cotton thread sewing method, so that the acceleration sensor is more reliably installed, and the acquired data is stable and real, thereby avoiding the situation that the side air curtain explosion test cannot be normally carried out due to the unreliable traditional connection mode.
Description
Technical Field
The invention relates to the technical field of sensor data acquisition, in particular to a method and a system for acquiring data of a flexibly connected acceleration sensor.
Background
In a side impact test, through high-speed video observation, a reading lamp splashes in the impact process, and hard splashes (such as hard plastic fragments, metal fragments and the like) are not required to occur in the 2021CNCAP side air curtain evaluation, so that the test score is influenced. To solve this problem during the part testing phase, it is necessary to analyze the force of the reading light on the ceiling. The stress condition of the reading lamp can be analyzed by acquiring the acceleration of the ceiling when the side air curtain is exploded.
The traditional sensor mounting methods at present include the following:
(1) the screws are connected and fixed, large holes are required to be arranged on the vehicle ceiling for installing the screws, and the screws and the sensor installation block have large gaps with the vehicle ceiling;
(2) the adhesive is fixed by glue, the adhesive is not easy to be used on the rough surface of the fabric, the ceiling falls off when stressed, test data cannot be acquired, and the amplitude range is limited;
(3) the magnetic paste is fixed, so that the acceleration frequency response is reduced, and the measurement range is limited; therefore, the installation mode cannot meet the requirement that the sensor is not dropped off when being installed on a ceiling under stress, and the acceleration curve requirement of accuracy and proper vibration frequency cannot be acquired.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a data acquisition method of a flexible connection acceleration sensor.
According to the data acquisition method of the flexible connection acceleration sensor, the data acquisition method comprises the following steps:
step S1: constructing a reduction collision side air curtain explosion test scene: a project integration engineer coordinates and prepares a material sample required by reducing the gas curtain explosion at the side of the collision test, and builds a consistent test scene;
step S2: inputting acceleration acquisition parameters in CAE (Computer Aided Engineering) software, but not limited to the above requirements, and simulating an acceleration original data curve obtained in Hypermesh software;
step S3: determining the installation position of the sensor installation block in a test scene: making hole site marks at the collection points on the vehicle ceiling, and determining the installation position of the sensor installation block;
step S4: installing a sensor installation block: a small round hole slightly larger than the diameter of the embroidery needle penetrates through the hole position mark of the vehicle ceiling. Selecting a weaving process to fix the sensor mounting block on the vehicle ceiling;
step S5: preparing a side air curtain explosion test: fixing a sensor on a sensor mounting block, configuring input acceleration acquisition parameters, and completing preparation of a side air curtain explosion test;
step S6: developing a side air curtain explosion test, collecting acceleration test data of the flying vehicle ceiling in the explosion test process, and downloading the acceleration test data;
step S7: carrying out data filtering on the downloaded acceleration test data, and analyzing an extreme value of a data curve and a fluctuation condition of the curve after the data filtering;
step S8: intercepting data after data filtering, comparing the data with CAE software simulation data, judging whether extreme values and fluctuation conditions of data curves after the data filtering are consistent with acceleration original data curves or not, if so, jumping to a step S9, and if not, jumping to a step S4;
step S9: the sensor fixing weave meets the acceleration data acquisition requirement, and the flexible connection acceleration sensor acquisition method is finished.
According to the data acquisition method of the flexibly connected acceleration sensor, disclosed by the embodiment of the invention, the acceleration sensor is arranged on the vehicle ceiling through a cotton thread sewing method, and the flexible connection can be used for connecting hard objects and non-hard objects, so that the installation and the connection of the acceleration sensor are more reliable, and the acquired data are more stable and more real, and the condition that the side air curtain point explosion test cannot be normally carried out due to the unreliable traditional connection mode is avoided.
According to some embodiments of the present invention, the acceleration acquisition parameters input in step S2 include acceleration position acquisition points, acceleration acquisition channel number and acceleration acquisition directions, so as to facilitate the simultaneous acquisition of multiple sets of data for analysis.
According to some embodiments of the present invention, in step S3, a circular hole template is manufactured according to the size of the sensor mounting block and the position of the circular hole on the surface, and a hole position mark is made at a collection point on the roof of the vehicle by using the circular hole template to determine the mounting position of the sensor, so as to adapt to different sensor weaving processes.
According to some embodiments of the present invention, in step S4, an electric gun is used with a drill bit with a smaller diameter (the tool is not limited to the electric gun), and a small round hole slightly larger than the diameter of the embroidery needle is punched at the hole position mark of the vehicle roof, so as to avoid excessive damage to the roof.
According to some embodiments of the present invention, the data filtering manner in step S7 adopts CFC60 (Channel Frequency Class, CFC for short) to analyze the extreme value of the data curve after CFC60 and the fluctuation condition of the curve, which is beneficial to reflect the authenticity of the test after data processing.
According to some embodiments of the present invention, the data intercepted in step S8 is data before 150 to 200ms after filtering, and is compared with CAE software simulation data, where the criterion for determining whether the extreme value and the fluctuation condition of the curve are consistent with the acceleration original data curve is that the size of the extreme value of the data curve after data filtering does not exceed 10% of the size of the extreme value of the acceleration original data curve, and the fluctuation conditions of the two curves are consistent, the extreme value and the fluctuation condition of the data curve after data filtering are considered to be consistent with the acceleration original data curve, and if the conditions are not met, the curve is considered to be inconsistent.
According to some embodiments of the invention, the knitting process in the step S4 includes:
weaving, namely, using embroidery needles and cotton threads to penetrate into the front surface of the second hole, penetrate out of the back surface of the third hole, penetrate into the front surface of the fourth hole, penetrate out of the back surface of the first hole, penetrate into the front surface of the second hole again, and weave according to the path, wherein the cotton threads are fixed with 15-20 circles of holes of a vehicle ceiling around a hole position of a sensor mounting block;
weaving a second method, namely, threading an embroidery needle and cotton threads from the front side of the first hole, out of the back side of the third hole, threading the front side of the fourth hole, out of the back side of the second hole, threading the front side of the first hole, and weaving according to the path, wherein the cotton threads are fixed after being wound around the hole site of the sensor mounting block and the hole site of the vehicle ceiling for 15 to 20 circles;
and thirdly, threading a cotton thread matched with an embroidery needle from the front side of the first hole, threading the cotton thread from the back side of the second hole, threading the cotton thread from the front side of the sixth hole, threading the cotton thread from the back side of the seventh hole, threading the cotton thread from the front side of the third hole, threading the cotton thread from the back side of the fourth hole, threading the cotton thread from the front side of the eighth hole, threading the cotton thread from the back side of the fifth hole, threading the cotton thread from the front side of the first hole, weaving according to the path, and fixing the cotton thread after 15-20 circles around the hole position of the sensor mounting block and the hole position of the vehicle ceiling.
According to the embodiment of the second aspect of the invention, a flexible connection acceleration data acquisition system is provided, and the method is adopted to acquire data of flexible connection acceleration.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed 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 it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a test flow diagram of a method for flexible link acceleration sensor data acquisition according to an embodiment of the present invention;
FIG. 2 is a schematic knitting diagram of a first knitting method in a knitting process according to an embodiment of the invention, wherein a black shaded block portion is an acceleration sensor;
FIG. 3 is a schematic knitting diagram of a second knitting method in the knitting process according to the embodiment of the invention, wherein the black shaded block portion is an acceleration sensor;
FIG. 4 is a schematic knitting diagram of a third knitting method in the knitting process according to the embodiment of the invention, wherein the black shaded block portion is an acceleration sensor;
reference numerals:
1. a first hole; 2. a second hole; 3. a third aperture; 4. a fourth aperture; 5. a fifth aperture; 6. a sixth hole; 7. a seventh hole; 8. and an eighth hole.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, and it is to be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application.
Examples
As shown in fig. 1, a data acquisition method for a flexible connection acceleration sensor includes the following steps:
step S1: constructing a reduction collision side air curtain explosion test scene: a project integration engineer coordinates and prepares a material sample required by reducing the gas curtain explosion at the side of the collision test, and builds a consistent test scene;
step S2: inputting acceleration acquisition parameters in CAE (Computer Aided Engineering) software, but not limited to the above requirements, and simulating in Hypermesh software to obtain acceleration original data curves in different directions, wherein the acceleration acquisition parameters comprise acceleration position acquisition points, the number of acceleration acquisition channels, the acceleration acquisition direction and the like;
step S3: determining the installation position of the sensor installation block in a test scene: making hole site marks at the collection points on the vehicle ceiling, and determining the installation position of the sensor installation block;
step S4: installing a sensor installation block: an electric gun is used together with a drill bit with a smaller diameter (tools are not limited to the electric gun), and a small round hole slightly larger than the diameter of the embroidery needle penetrates through the hole site mark of the vehicle ceiling. Selecting a weaving process to fix the sensor mounting block on the vehicle ceiling;
step S5: preparing a side air curtain explosion test: fixing a sensor on a sensor mounting block, configuring input acceleration acquisition parameters, and completing preparation of a side air curtain explosion test;
step S6: developing a side air curtain explosion test, collecting acceleration test data of the flying vehicle ceiling in the explosion test process, and downloading the acceleration test data;
step S7: carrying out data filtering on the downloaded acceleration test data, and analyzing an extreme value of a data curve and a fluctuation condition of the curve after the data filtering, specifically, adopting CFC60 (Channel Frequency Class) as a data filtering mode, and analyzing the extreme value of the data curve and the fluctuation condition of the curve after CFC 60;
step S8: intercepting data after data filtering, comparing the data with CAE software simulation data, judging whether extreme values and fluctuation conditions of a data curve after the data filtering are consistent with an acceleration original data curve or not, if so, jumping to step S9, and if not, jumping to step S4;
step S9: the sensor fixing weave meets the acceleration data acquisition requirement, and the flexible connection acceleration sensor acquisition method is finished.
Specifically, in step S3, a circular hole template is manufactured according to the size of the sensor mounting block and the position of the circular hole on the surface, a hole position mark is made at a collection point on the vehicle ceiling by using the circular hole template, and the mounting position of the sensor is determined to adapt to different sensor weaving processes.
Specifically, the data intercepted in the step S8 is data after filtering for 150ms to 200ms before being compared with CAE software simulation data; and judging whether the extreme value and the fluctuation condition of the curve are consistent with the acceleration original data curve or not according to the standard that the extreme value of the data curve after data filtration does not exceed 10% of the extreme value of the acceleration original data curve and the fluctuation conditions of the two curves are consistent, and then considering that the extreme value and the fluctuation condition of the data curve after data filtration are consistent with the acceleration original data curve.
In this embodiment, three knitting processes are further provided, as shown in fig. 2 to 4, where a black wire frame in the drawing is a sensor mounting block region, a solid line with an arrow indicates that the front side of the needle method is knitted in, and a dotted line with an arrow indicates that the back side of the needle method is knitted out, which specifically includes the following steps:
first, referring to fig. 2, an embroidery needle is used to insert cotton thread from the front of the second hole 2, and then the cotton thread is inserted from the back of the third hole 3, from the front of the fourth hole 4, from the back of the first hole 1, and then from the front of the second hole 2, and then the cotton thread is woven according to the path, and the cotton thread is fixed with the hole site of the vehicle ceiling after being wound 15 to 20 circles around the hole site of the sensor mounting block.
Secondly, as shown in fig. 3, an embroidery needle is used to match with cotton threads to penetrate into the front of the first hole 1, penetrate out of the back of the third hole 3, penetrate into the front of the fourth hole 4, penetrate out of the back of the second hole 2, penetrate into the front of the first hole 1 again, and weave according to the path, and the cotton threads are fixed with 15-20 circles around the hole position of the sensor mounting block and the hole position of the vehicle ceiling.
Thirdly, referring to fig. 4, embroidery needles are used to match cotton threads to penetrate into the front of the first hole 1, penetrate out of the back of the second hole 2, penetrate into the front of the sixth hole 6, penetrate out of the back of the seventh hole 7, penetrate into the front of the third hole 3, penetrate out of the back of the fourth hole 4, penetrate into the front of the eighth hole 8, penetrate out of the back of the fifth hole 5, penetrate into the front of the first hole 1 again, and are woven according to the path, and the cotton threads are fixed after being wound around the hole positions of the sensor mounting block and the hole positions of the vehicle ceiling for 15 to 20 circles.
The invention further provides a data acquisition system of the flexible connection acceleration sensor, which adopts the method to acquire data of the flexible connection acceleration.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered as limiting the invention.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (8)
1. A data acquisition method of a flexible connection acceleration sensor is characterized by comprising the following steps:
step S1: constructing a reduction collision side air curtain explosion test scene;
step S2: inputting acceleration acquisition parameters in CAE software, and simulating in Hypermesh software to obtain an acceleration original data curve;
step S3: determining the installation position of a sensor installation block in a test scene: making hole site marks at the collection points on the vehicle ceiling in a test scene, and determining the installation position of the sensor installation block;
step S4: installing a sensor installation block: penetrating a round hole at the hole site mark of the vehicle ceiling, and selecting a weaving process to fix the sensor mounting block on the vehicle ceiling;
step S5: preparing a side air curtain explosion test: fixing a sensor on a sensor mounting block, configuring input acceleration acquisition parameters, and completing preparation of a side air curtain explosion test;
step S6: developing a side air curtain explosion test, collecting acceleration test data of the flying vehicle ceiling in the explosion test process, and downloading the acceleration test data;
step S7: carrying out data filtering on the downloaded acceleration test data, and analyzing an extreme value of a data curve after the data filtering and the fluctuation condition of the curve;
step S8: intercepting data after data filtering, comparing the data with CAE software simulation data, judging whether extreme values and fluctuation conditions of a data curve after the data filtering are consistent with an acceleration original data curve or not, if so, jumping to step S9, and if not, jumping to step S4;
step S9: the sensor fixing weave meets the acceleration data acquisition requirement, and the flexible connection acceleration sensor acquisition method is finished.
2. The method for acquiring the data of the flexibly connected acceleration sensor according to claim 1, comprising the following steps: the acceleration acquisition parameters input in step S2 include acceleration position acquisition points, the number of acceleration acquisition channels, and acceleration acquisition directions.
3. The method for acquiring the data of the flexibly connected acceleration sensor according to claim 1, comprising the following steps: and step S3, a circular hole template is manufactured according to the size of the sensor mounting block and the position of the circular hole on the surface, and a hole position mark is made at a collection point on the vehicle ceiling by using the circular hole template to determine the mounting position of the sensor.
4. The method for acquiring the data of the flexibly connected acceleration sensor according to claim 1, comprising the following steps: and step S4, an electric gun is matched with a drill, and a round hole with the diameter larger than that of the embroidery needle penetrates out of the hole position mark of the vehicle ceiling.
5. The method for acquiring the data of the flexibly connected acceleration sensor according to claim 1, comprising the following steps: in the step S7, the CFC60 is adopted as a data filtering method, and the extreme value of the data curve and the fluctuation condition of the curve after CFC60 are analyzed.
6. The method for acquiring the data of the flexible connection acceleration sensor according to the claim 1, characterized by comprising the following steps: and comparing the data intercepted in the step S8, which is the filtered data of 150 ms-200 ms, with the CAE software simulation data.
7. The method for acquiring the data of the flexibly connected acceleration sensor according to claim 1, comprising the following steps: in step S8, if the criterion for determining whether the extreme value and the fluctuation condition of the curve are consistent with the acceleration raw data curve is that the size of the extreme value of the data curve after data filtering does not exceed 10% of the size of the extreme value of the acceleration raw data curve, and the fluctuation conditions of the two curves are consistent, the extreme value and the fluctuation condition of the data curve after data filtering are considered to be consistent with the acceleration raw data curve.
8. A flexible connection acceleration data acquisition system comprising the method of any of claims 1-7 for data acquisition of a flexible connection acceleration sensor.
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