CN217236825U - Tool for testing bandwidth of accelerometer - Google Patents
Tool for testing bandwidth of accelerometer Download PDFInfo
- Publication number
- CN217236825U CN217236825U CN202221172463.2U CN202221172463U CN217236825U CN 217236825 U CN217236825 U CN 217236825U CN 202221172463 U CN202221172463 U CN 202221172463U CN 217236825 U CN217236825 U CN 217236825U
- Authority
- CN
- China
- Prior art keywords
- accelerometer
- bandwidth
- testing
- base
- fixed block
- 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.)
- Active
Links
Images
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The utility model discloses a tool for testing the bandwidth of an accelerometer, which comprises a base, an accelerometer fixing part and a sensor fixing part; the accelerometer fixing part is positioned in the center of the upper surface of the base and comprises a fixing block, a PCB and an accelerometer to be tested, wherein an inner concave area is arranged on the side surface of the fixing block, the accelerometer to be tested is welded on the PCB and placed in the inner concave area, and the PCB is connected with the surface of the fixing block, which is provided with the inner concave area; the sensor fixing part comprises a standard sensor, and the standard sensor is arranged right above the fixing block. The utility model discloses simple structure, convenient operation can not introduce the resonance point at the test frequency channel, guarantees standard sensor and the accelerometer rigid connection's that awaits measuring under the prerequisite for standard sensor installs in the mesa center, makes the sensitive structure of the accelerometer that awaits measuring very close mesa center, has reduced the influence of the vibration of non-excitation direction to the test, has guaranteed bandwidth test result accuracy.
Description
Technical Field
The utility model relates to an inertia device test technical field, concretely relates to frock for accelerometer bandwidth test.
Background
The accelerometer is a sensor for sensing external acceleration, the bandwidth of the accelerometer refers to the maximum change frequency of an acceleration signal which can be measured by the sensor, and if the change frequency of the external acceleration signal exceeds the bandwidth of the sensor, the sensor cannot truly restore the change of the external signal. Therefore, it is necessary to test the bandwidth of the accelerometer, and the application scenario of the accelerometer can be determined by comparing the bandwidth with the change frequency of the acceleration signal to be tested, the accelerometer with a narrow bandwidth can be used in a low-frequency acceleration scenario, and can obtain a lower noise performance, and conversely, the accelerometer with a wide bandwidth is more suitable for a high-frequency acceleration scenario, so as to truly reflect the change of the external acceleration.
The accelerometer bandwidth testing method comprises the following steps: and according to the requirement of the frequency response range, a precise linear vibration table is arranged, and the sinusoidal vibration acceleration is input from low frequency to high frequency. And recording the actually measured input and output values to obtain the frequency response of the accelerometer. For correct testing of the acceleration given by the vibrating table, a standard accelerometer with high accuracy can be used for comparison. And calculating a frequency point of the output amplitude reduced by 3dB according to the amplitude-frequency curve of the accelerometer, namely the working bandwidth of the accelerometer.
In the bandwidth test, the standard sensor and the accelerometer to be tested need to be installed on the same tool and under the same excitation, and finally the output results of the standard sensor and the accelerometer to be tested are compared, so that the bandwidth of the accelerometer to be tested is calculated. Since common excitation sources are all electromagnetic vibration tables in the vertical direction, in the process of generating excitation, only the excitation of the central point of the table top of the vibration table is closest to the ideal excitation, and the more the excitation deviates from the central point, the more easily the interference excitation in the horizontal direction is generated, so that in the process of designing the tool, the sensitive structures of the standard sensor and the accelerometer to be tested are close to the center of the table top as much as possible. In the design process of the tool, the appearance of a thin wall and a complex structure is avoided, so that a resonance point related to the tool is avoided.
SUMMERY OF THE UTILITY MODEL
To the problem, the utility model provides a frock for accelerometer bandwidth test, this frock simple structure itself does not have complex structure, can not introduce the resonance point at the test frequency channel. And the influence of vibration in a non-excitation direction on the test can be reduced on the premise of ensuring the rigid connection of the standard sensor and the accelerometer to be tested.
The utility model adopts the following technical proposal:
a tool for testing the bandwidth of an accelerometer comprises a base, an accelerometer fixing part and a sensor fixing part; the accelerometer fixing component is positioned in the center of the upper surface of the base and comprises a fixing block, a PCB (printed circuit board) and an accelerometer to be tested, wherein an inner concave area is arranged on the side surface of the fixing block, the accelerometer to be tested is welded on the PCB and is placed in the inner concave area, the PCB supplies power to the accelerometer to be tested and reads data of the accelerometer to be tested, the PCB is connected with the surface of the fixing block, which is provided with the inner concave area, and the inner concave area enables the accelerometer to be tested to be closer to the central shaft; the sensor fixing part comprises a standard sensor, and the standard sensor is arranged right above the fixing block.
Preferably, the base is provided with a plurality of threaded holes.
Preferably, the shape of the base corresponds to the shape of the vibration table for testing, and the base is connected with the vibration table through a threaded hole of the base by a screw.
Preferably, the PCB and the side face of the fixed block are respectively provided with a first screw hole with the same diameter, and the PCB is connected with the fixed block through screws.
Preferably, the center of the bottom of the standard sensor and the center of the upper surface of the fixing block are both provided with second screw holes with the same diameter, and the standard sensor and the fixing block are connected through a double-end stud.
Preferably, the base and the fixing block are made of aluminum alloy materials, and the surfaces of the base and the fixing block are subjected to corrosion prevention treatment.
Preferably, the parallelism of the upper surface and the lower surface of the base and the fixed block is not more than 0.02mm, and the sag of the four side surfaces of the fixed block and the upper surface and the lower surface is not more than 0.02 mm.
Preferably, the perpendicularity between the side face of the fixed block and the first screw hole is not more than 0.01 mm.
Preferably, the verticality of the bottom of the standard sensor, the upper surface of the fixed block and the second screw hole does not exceed 0.01 mm.
The utility model has the advantages that: the utility model discloses simple structure, convenient operation can not introduce the resonance point at the test frequency channel, guarantees standard sensor and the accelerometer rigid connection's that awaits measuring under the prerequisite for standard sensor installs in the mesa center, makes the sensitive structure of the accelerometer that awaits measuring very close mesa center, has reduced the influence of the vibration of non-excitation direction to the test, has guaranteed bandwidth test result accuracy.
Drawings
In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the drawings of the embodiments will be briefly described below, and it is obvious that the drawings in the following description only relate to some embodiments of the present invention, and are not intended to limit the present invention.
Fig. 1 is a schematic structural diagram of the present invention.
In the figure:
the device comprises a base 1, an accelerometer fixing part 2, a sensor fixing part 3, a fixing block 4, a PCB 5, an accelerometer to be tested 6, an inwards concave area 7, a standard sensor 8, a screw 9 and a stud 10.
Detailed Description
In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention will be combined below to clearly and completely describe the technical solution of the embodiments of the present invention. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of the word "comprising" or "comprises", and the like, in this disclosure is intended to mean that the elements or items listed before that word, include the elements or items listed after that word, and their equivalents, without excluding other elements or items. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
The present invention will be further explained with reference to the drawings and examples.
As shown in fig. 1, a tooling for testing the bandwidth of an accelerometer comprises a base 1, an accelerometer fixing part 2 and a sensor fixing part 3; the accelerometer fixing component 2 is positioned in the center of the upper surface of the base 1 and comprises a fixing block 4, a PCB (printed circuit board) 5 and an accelerometer 6 to be tested, wherein an inner concave area 7 is arranged on the side surface of the fixing block 4, the accelerometer 6 to be tested is welded on the PCB 5 and is placed in the inner concave area 7, the PCB 5 supplies power to the accelerometer 6 to be tested and reads data of the accelerometer 6 to be tested, the PCB 5 is connected with the surface of the fixing block 4, which is provided with the inner concave area 7, and the inner concave area 7 enables the accelerometer 6 to be tested to be closer to a central shaft; the sensor fixing part 3 comprises a standard sensor 8, and the standard sensor 8 is arranged right above the fixing block 4.
The shape of the base 1 corresponds to that of the vibration table for testing, and the base 1 is connected with the vibration table through a threaded hole of the base 1 by a screw. The base 1 of the present embodiment is circular in shape.
The center of the bottom of the standard sensor 8 and the center of the upper surface of the fixing block 4 are both provided with second screw holes with the diameter of 5mm, and the standard sensor 8 and the fixing block 4 are connected through a stud 10 with the diameter of 5 mm.
The base 1 and the fixing block 4 are made of aluminum alloy materials, and the surfaces of the base and the fixing block are subjected to anti-corrosion treatment.
The parallelism of the upper surface and the lower surface of the base 1 and the fixed block 4 is not more than 0.02mm, and the sag of the four side surfaces and the upper surface and the lower surface of the fixed block 4 is not more than 0.02 mm.
The perpendicularity between the side face of the fixed block 4 and the first screw hole is not more than 0.01 mm.
The verticality of the bottom of the standard sensor 8, the upper surface of the fixed block 4 and the second screw hole does not exceed 0.01 mm.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention has been disclosed with reference to the preferred embodiment, it is not intended to limit the present invention, and any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, and any simple modification, equivalent change and modification made to the above embodiments by the technical essence of the present invention will still fall within the scope of the technical solution of the present invention.
Claims (9)
1. The tooling for testing the bandwidth of the accelerometer is characterized by comprising a base (1), an accelerometer fixing part (2) and a sensor fixing part (3); the accelerometer fixing component (2) is positioned in the center of the upper surface of the base (1) and comprises a fixing block (4), a PCB (printed circuit board) and an accelerometer to be tested (6), an inner concave area (7) is arranged on the side surface of the fixing block (4), the accelerometer to be tested (6) is welded on the PCB (5) and is placed in the inner concave area (7), and the PCB (5) is connected with the surface of the fixing block (4) provided with the inner concave area (7); the sensor fixing part (3) comprises a standard sensor (8), and the standard sensor (8) is installed right above the fixing block (4).
2. The tooling for testing the bandwidth of the accelerometer according to claim 1, wherein the base (1) is provided with a plurality of threaded holes.
3. The tooling for testing the bandwidth of the accelerometer according to claim 1, wherein the shape of the base (1) corresponds to the shape of the vibrating table for testing.
4. The tooling for testing the bandwidth of the accelerometer according to claim 1, wherein the lateral surfaces of the PCB (5) and the fixed block (4) are respectively provided with a first screw hole with the same diameter, and the PCB (5) and the fixed block (4) are connected through a screw (9).
5. The tooling for testing the bandwidth of the accelerometer according to claim 1, wherein the center of the bottom of the standard sensor (8) and the center of the upper surface of the fixed block (4) are provided with second screw holes with the same diameter, and the standard sensor (8) and the fixed block (4) are connected through a stud (10).
6. The tooling for testing the bandwidth of the accelerometer according to claim 1, wherein the base (1) and the fixed block (4) are made of aluminum alloy materials, and the surfaces of the base and the fixed block are subjected to corrosion prevention treatment.
7. The tooling for testing the bandwidth of the accelerometer according to claim 1, wherein the parallelism of the upper and lower surfaces of the base (1) and the fixed block (4) is not more than 0.02mm, and the sag of the four side surfaces of the fixed block (4) to the upper and lower surfaces is not more than 0.02 mm.
8. The tooling for testing the bandwidth of the accelerometer according to claim 4, wherein the perpendicularity between the side surface of the fixed block (4) and the first screw hole is not more than 0.01 mm.
9. The tooling for testing the bandwidth of the accelerometer according to claim 5, wherein the verticality of the bottom of the standard sensor (8), the upper surface of the fixed block (4) and the second screw hole is not more than 0.01 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221172463.2U CN217236825U (en) | 2022-05-16 | 2022-05-16 | Tool for testing bandwidth of accelerometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221172463.2U CN217236825U (en) | 2022-05-16 | 2022-05-16 | Tool for testing bandwidth of accelerometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217236825U true CN217236825U (en) | 2022-08-19 |
Family
ID=82822836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221172463.2U Active CN217236825U (en) | 2022-05-16 | 2022-05-16 | Tool for testing bandwidth of accelerometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217236825U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115728517A (en) * | 2022-11-14 | 2023-03-03 | 北京自动化控制设备研究所 | Accelerometer calibration-free nonlinear measurement tool and device |
-
2022
- 2022-05-16 CN CN202221172463.2U patent/CN217236825U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115728517A (en) * | 2022-11-14 | 2023-03-03 | 北京自动化控制设备研究所 | Accelerometer calibration-free nonlinear measurement tool and device |
| CN115728517B (en) * | 2022-11-14 | 2024-04-02 | 北京自动化控制设备研究所 | Non-linear measurement tool and device for calibration-free accelerometer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN217236825U (en) | Tool for testing bandwidth of accelerometer | |
| CN112098981B (en) | Dynamic amplitude calibration device for laser displacement sensor | |
| CN104977218B (en) | Micro-elastic detail rigidity detection device and method | |
| CN110987016A (en) | Dynamic characteristic calibration system for dynamically tuned gyroscope flexible assembly | |
| CN109238308A (en) | A kind of the high-accuracy modal test system and test method of metal tubular resonant gyroscope | |
| Prato et al. | A reliable sampling method to reduce large sets of measurements: a case study on the calibration of digital 3-axis MEMS accelerometers | |
| EP1039302A1 (en) | Method for calibrating sensitivity of acceleration sensor | |
| CN107560573B (en) | A kind of suspension-wire type stiffness variable micro-nano gauge head | |
| CN108363094A (en) | Rotate seismometer | |
| CN209327585U (en) | Reaction type earthquake vibration pickup mechanical pendulum | |
| CN117053974A (en) | Micro force value measuring device and method based on flexible rack | |
| CN111024131B (en) | Calibration method for horizontal reference mirror | |
| CN112016234B (en) | Mechanical pendulum, test system and test method of differential capacitance seismometer | |
| CN205175696U (en) | Measurement device for be used for aeroengine structure spare natural frequency | |
| CN213456040U (en) | Leeb clip tester | |
| MXPA00012334A (en) | Method and apparatus for determining a frequency at which a resonator resonates. | |
| CN114136338A (en) | Assembly testing device and method for repairing and debugging hemispherical harmonic oscillator without displacement table | |
| CN207518856U (en) | A kind of cone detection device | |
| CN111323117A (en) | Vibration sensor intermediate frequency calibration system capable of inhibiting transverse deflection | |
| CN216266914U (en) | Wafer deformation optimization device for invisible cutting machine and invisible cutting machine | |
| CN111579748A (en) | Metal material performance parameter measuring device and method | |
| JPH0798221A (en) | Method for calibrating flatness measurement device | |
| CN215491470U (en) | Detection tool for detecting distance from base circle of cone to reference surface | |
| CN116642409A (en) | Absolute displacement measuring device special for vibrating table and method for expanding vibration absorption band of vibration absorber | |
| JPH0271166A (en) | Surface potential sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |