An axial conversion device for a multi-axis accelerometer sensor

Abstract

This invention provides an axial conversion device for a multi-axis accelerometer sensor, belonging to the field of precision instrument testing. The device includes a sensor under test, a signal analyzer, and a housing. A first cable holder is located at one end of the housing, and a second cable holder is located at the other end. The first cable holder has multiple input terminals, which are electrically connected to multiple output terminals of the sensor under test. The second cable holder is electrically connected to the input terminal of the signal analyzer. An axial adjustment module is located inside the housing. The axial adjustment module includes a line switching device, output contacts, and multiple input contacts. The multiple input contacts are electrically connected to the multiple input terminals of the first cable holder, and the output contacts are electrically connected to the second cable holder. The axial conversion device for a multi-axis accelerometer sensor provided by this invention can solve the problems of low continuity and low safety in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of precision instrument testing, and in particular to an axial conversion device for a multi-axis accelerometer sensor. Background Technology

[0002] A multi-axis accelerometer sensor is an electronic device used to measure the acceleration of an object in multiple spatial directions. Its core function is to quantify the changes in motion of an object along a single, dual, or triple axis (such as X, Y, and Z directions) by detecting inertial forces (caused by acceleration). Some advanced models even support more degrees of freedom (such as 6 or 9 axes, combined with gyroscopes and magnetometers). After the multi-axis accelerometer sensor is manufactured, it typically undergoes sensitivity and accuracy testing to ensure its accuracy during normal use.

[0003] In existing technologies, the testing method for accelerometer sensors typically involves fixing a standard accelerometer sensor and the accelerometer sensor under test back-to-back on a calibration platform. The sensitive axes of the standard accelerometer sensor and the sensor under test are aligned and parallel to the vibration direction. The entire system, including the sensor and calibration platform, is then powered on and preheated for 3 minutes. The calibration platform is then adjusted to generate an acceleration of 80Hz and 10g. The result is obtained by comparing the voltage of the standard sensor with that of the standard sensor. When the sensor under test is a triaxial sensor with three output lines, only one sensitive axis can be measured per vibration. After measuring one axis, the sensitive axis of the sensor under test needs to be switched, and the acquisition line needs to be connected to the output line of another sensor under test using alligator clips.

[0004] In existing testing methods, after measuring one of the sensitive axes of a multi-axis accelerometer, the operator usually needs to move the alligator clips of the acquisition cable to the output line of another sensor under test. This operation is relatively complicated, and this wiring method results in exposed cables, which leads to low test continuity and low safety. Utility Model Content

[0005] This utility model provides an axial conversion device for a multi-axis accelerometer sensor, which can solve the problems of low continuity and low safety in the prior art. The technical solution is as follows:

[0006] An axial conversion device for a multi-axis accelerometer sensor includes a sensor under test, a signal analyzer, and a housing.

[0007] One end of the housing is provided with a first cable holder, and the other end is provided with a second cable holder. The first cable holder is provided with multiple input terminals, which are electrically connected to multiple output terminals of the sensor under test. The second cable holder is electrically connected to the input terminal of the signal analyzer. An axial adjustment module is provided inside the housing. The axial adjustment module includes a line switching device, an output contact, and multiple input contacts. The multiple input contacts are electrically connected to multiple input terminals of the first cable holder, and the output contact is electrically connected to the second cable holder. The line switching device is used to electrically connect the output contact to one of the input contacts.

[0008] Optionally, the output contacts and the input contacts are arranged in a circle, the line switching device is a knob, and the line switching device is provided with a first contact and a second contact. The first contact and the second contact are connected by a wire. The first contact is electrically connected to the output contact, and the second contact is electrically connected to one of the input contacts.

[0009] Optionally, a grounding point is provided within the axial adjustment module.

[0010] Optionally, the first cable holder is provided with a first power interface, and the second cable holder is provided with a second power interface. The first power interface includes a first positive power interface and a first negative power interface, and the second power interface includes a second positive power interface and a second negative power interface. The second power interface is electrically connected to a power source, the second positive power interface is electrically connected to the first positive power interface, the first negative power interface is electrically connected to the second negative power interface, and the first power interface is electrically connected to the power supply terminal of the sensor under test.

[0011] Optionally, a main switch is provided between the second positive power interface and the first positive power interface.

[0012] Optionally, the outer casing includes a box body and a box lid, which are detachably connected.

[0013] Optionally, the bottom of the box cover is provided with a latch, and the opening surface of the box body is provided with a socket that matches the latch.

[0014] Optionally, the cover is provided with a position mark, which matches the input contact.

[0015] Optionally, the first cable holder is provided with a plurality of plug holes, the plug holes being electrically connected to the input end of the first cable holder, and the output end of the sensor under test is provided with a plug matching the first cable holder.

[0016] Optionally, the second cable holder is a terminal block.

[0017] The beneficial effects of the technical solution provided by this utility model embodiment include at least the following:

[0018] This utility model provides an axial conversion device for a multi-axis accelerometer sensor. By connecting multiple output terminals of the sensor under test to multiple input terminals of a first cable holder at once, and using an axial adjustment module to connect different output terminals of the sensor under test to a signal analyzer, the device switches different output and input contacts for electrical connection. When testing different sensitive axes of the sensor under test, the device changes the orientation of the sensor on the test platform and controls the switch to complete the testing of different sensitive axes without rewiring during the test. Furthermore, since the cables are integrated inside the housing, no cables are exposed on the outside, thus effectively solving the problems of low continuity and low safety in the prior art. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the device provided in this embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of the box provided in this embodiment of the utility model;

[0022] Figure 3 This is a schematic diagram of the bottom structure of the line switching device provided in this embodiment of the utility model;

[0023] Figure 4 This is a circuit connection diagram provided in an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the box body and box lid fitting together according to an embodiment of the present utility model.

[0025] In the diagram: 101-Sensor under test; 102-Signal analyzer; 1-Housing shell; 11-Box body; 111-Socket; 12-Cover; 121-Pin; 122-Point marker; 2-First cable holder; 21-First power interface; 211-First positive power interface; 212-First negative power interface; 22-Plug hole; 3-Second cable holder; 31-Second power interface; 311-Second positive power interface; 312-Second negative power interface; 4-Axial adjustment module; 41-Line switching device; 411-First contact; 412-Second contact; 42-Output contact; 43-Input contact; 5-Main switch. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0027] Figure 1 This is a schematic diagram of the overall structure of the device provided in this embodiment of the utility model; Figure 2 This is a schematic diagram of the internal structure of the box provided in this embodiment of the utility model; Figure 3 This is a schematic diagram of the bottom structure of the line switching device provided in this embodiment of the utility model; Figure 4 This is a circuit connection diagram provided in an embodiment of the present invention; Figure 5 This is a schematic diagram showing the fit between the box body and the box lid provided in an embodiment of this utility model. Figures 1 to 5 The axial conversion device of a multi-axis accelerometer sensor shown includes a sensor under test 101, a signal analyzer 102, and a housing 1. One end of the housing 1 is provided with a first cable holder 2, and the other end is provided with a second cable holder 3. The first cable holder 2 is provided with multiple input terminals, which are electrically connected to multiple output terminals of the sensor under test 101. The second cable holder 3 is electrically connected to the input terminal of the signal analyzer 102. An axial adjustment module 4 is provided inside the housing 1. The axial adjustment module 4 includes a line switching device 41, an output contact 42, and multiple input contacts 43. The multiple input contacts 43 are electrically connected to multiple input terminals of the first cable holder 2, and the output contact 42 is electrically connected to the second cable holder 3. The line switching device 41 is used to electrically connect the output contact 42 to one of the input contacts 43.

[0028] Exemplarily, in this embodiment of the present invention, during testing, the test environment is ensured to be under standard atmospheric conditions. The standard accelerometer and the sensor under test 101 are fixed back-to-back on the test platform, with their sensitive axes coincident and parallel to the vibration direction. Then, the entire system, including the sensor and calibration platform, is powered on and preheated for 3 minutes. The calibration platform is adjusted to generate an acceleration of 80Hz and 10g, and the result is obtained by comparing it with the voltage of the standard sensor. The test platform is an electric vibration test system, typically composed of a standard vibration table, a charge amplifier, a standard accelerometer, and a signal analyzer 102. The data acquisition line of the signal analyzer 102 is connected to the output terminal of the sensor under test 101 through this axial conversion device. In this embodiment, the sensor under test 101 is a triaxial accelerometer sensor with three sensitive axes: X, Y, and Z. Before the test begins, the three output terminals of the sensor under test 101 are connected to the three input terminals of the first cable holder 2, which in turn are connected to three input contacts 43. The output contact 42 is connected to the second cable holder 3, which is electrically connected to the input terminal of the signal analyzer 102. When the line switching device 41 connects the input contact 43 corresponding to the X-axis to the output contact 42, the sensor under test 101 is switched to the X-axis and placed on the test platform for testing. The resulting test result is the X-axis test result. When it is necessary to continue the Y-axis test, the line switching device 41 is used to connect the input contact 43 corresponding to the Y-axis to the output contact 42. The sensor under test 101 is then switched to the Y-axis and placed on the test platform for testing. The resulting test result is the Y-axis test result. Similarly, when Z-axis testing is required, the input contact 43 and output contact 42 of the corresponding Z-axis are connected via the control line switching device 41. At this time, the sensor under test 101 is switched to the Z-axis and placed on the test platform for testing. The test result obtained is the Z-axis test result. That is, the control line switching device 41 can realize rapid and continuous multi-axis testing of the sensor under test 101. Compared with the traditional technology, which requires the alligator clip of the signal analyzer 102 acquisition cable to be connected to the output line of another sensor under test 101 for each test, the axis conversion device in this embodiment does not require additional wiring operations, which improves the convenience and continuity of operation during the testing process. Moreover, since the cable is integrated inside the housing 1, the cable will not be exposed on the outside, thereby improving the safety during the testing process.

[0029] This utility model provides an axial conversion device for a multi-axis accelerometer sensor. By connecting multiple output terminals of the sensor under test 101 to multiple input terminals of the first cable fixing seat 2 in one go, and using the axial adjustment module 4 to connect different output terminals of the sensor under test 101 to the signal analyzer 102, the circuit switching device 41 switches different output contacts 42 and input contacts 43 for electrical connection. When testing different sensitive axes of the sensor under test 101, the orientation of the sensor under test 101 placed on the test platform is changed, and the circuit switching device 41 is operated to complete the testing of different sensitive axes of the sensor under test 101. There is no need to rewire during the test. Since the cable is integrated inside the housing 1, the cable is not exposed on the outside, thus effectively solving the problems of low continuity and low safety in the prior art.

[0030] Optionally, the output contact 42 and the input contact 43 are arranged in a circle, the line switching device 41 is a knob, and the line switching device 41 is provided with a first contact 411 and a second contact 412. The first contact 411 and the second contact 412 are connected by a wire. The first contact 411 is electrically connected to the output contact 42, and the second contact 412 is electrically connected to one of the input contacts 43.

[0031] Exemplary, in embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the output contact 42 and input contact 43 are arranged in a circle, and the circuit switching device 41 is set as a knob. The circuit switching device 41 acts as a wire, fixing the first contact 411 to the output contact 42. When the circuit switching device 41 is rotated, the second contact 412 can be connected to one of the input contacts 43, thus forming a circuit, allowing one of the output terminals of the sensor under test 101 to be connected to the signal analyzer 102. By setting the axial adjustment module 4 in this structure, the testing of different sensitive axes of the sensor under test 101 can be achieved simply by rotating the circuit switching device 41, thereby further improving the ease of operation of this device.

[0032] Optionally, a grounding point is provided inside the axial adjustment module 4.

[0033] Exemplary, in the implementation of this utility model, such as Figure 2 As shown, the blank areas between output contact 42 and input contact 43, and between multiple input contacts 43, are all grounding points. When the line switching device 41 is rotated to the grounding point, the second contact 412 is not connected to any of the input contacts 43. At this time, the sensitive axes of the sensor under test 101 are not connected to the signal analyzer 102, and the device is not being tested. By setting the grounding point, the line switching device 41 can be rotated to the grounding point when the device is not being tested, further improving the ease of operation of the device.

[0034] Optionally, a first power interface 21 is provided on the first cable holder 2, and a second power interface 31 is provided on the second cable holder 3. The first power interface 21 includes a first positive power interface 211 and a first negative power interface 212. The second power interface 31 includes a second positive power interface 311 and a second negative power interface 312. The second power interface 31 is electrically connected to a power source. The second positive power interface 311 is electrically connected to the first positive power interface 211, and the first negative power interface 212 is electrically connected to the second negative power interface 312. The first power interface 21 is electrically connected to the power supply terminal of the sensor under test 101.

[0035] Exemplary, in embodiments of this utility model, such as Figure 2 As shown, the positive terminal of the power supply is connected to the second power positive interface 311, the negative terminal of the power supply is connected to the second power negative interface 312, the power supply terminal on the sensor under test 101 is connected to the first power positive interface 211, and the ground terminal is connected to the first power negative interface 212, thus forming a power supply circuit to supply power to this device.

[0036] Optionally, a main switch 5 is provided between the second power positive interface 311 and the first power positive interface 211.

[0037] Exemplary, in embodiments of this utility model, such as Figure 2 and Figure 4 As shown, by setting the main switch 5, the circuit of this device can be disconnected or connected by controlling the main switch 5. The main switch 5 can be protruded on the cover 12. By pressing the main switch 5, the circuit can be disconnected or connected. By setting this structure, the ease of operation of this device is further improved.

[0038] Optionally, the outer casing 1 includes a box body 11 and a box cover 12, which are detachably connected.

[0039] For example, in this embodiment of the present invention, the outer shell 1 is configured as a box body 11 and a box cover 12, which facilitates the operation and adjustment of the circuit structure inside the box body 11. When testing, the box cover 12 can be fixed on the box body 11 to protect the circuit structure inside the box body 11, thereby further improving the ease of operation of the device.

[0040] Optionally, a latch 121 is provided at the bottom of the cover 12, and a socket 111 matching the latch 121 is provided on the opening surface of the box body 11.

[0041] Exemplary, in embodiments of this utility model, such as Figure 5As shown, by setting the pin 121 and the socket 111, the box body 11 and the box cover 12 can be quickly separated or joined, thereby realizing the quick disassembly and assembly of the box body 11 and the box cover 12, which further improves the ease of operation of this device.

[0042] Optionally, the cover 12 is provided with a position mark 122, which matches the input contact 43.

[0043] Exemplary, in embodiments of this utility model, such as Figure 1 As shown, corresponding "X, Y, Z" markings are provided on one side of the input contacts 43 that connect to the sensitive axes X, Y, Z of the sensor under test 101, and corresponding "off" markings are also provided on the grounding point side. By setting the point markings 122, the operator can easily adjust the position of the line switching device 41 according to the point markings 122 during the test, thereby further improving the ease of operation of this device.

[0044] Optionally, the first cable holder 2 is provided with a plurality of plug holes 22, the plug holes 22 being electrically connected to the input end of the first cable holder 2, and the output end of the sensor under test 101 is provided with a plug that matches the first cable holder 2.

[0045] Exemplary, in embodiments of this utility model, such as Figure 1 and Figure 4 As shown, the first cable holder 2 is configured as a plug-in hole 22, and a plug matching the first cable holder 2 is provided on the output end of the sensor 101, making the plug and the plug-in hole 22 cooperate, which is more convenient for operation. Compared with the alligator clip in the traditional technology, the structure in this embodiment allows the cable to be inside the plug and the plug-in hole 22, and not exposed, thereby improving the safety of the device. When the sensor 101 under test is subjected to multi-axis testing, it needs to be rotated in different directions. With alligator clips, it may fall off during the rotation process, while the plug-in connection is more stable for the line connection than with alligator clips.

[0046] Optionally, the second cable holder 3 is a terminal block.

[0047] For example, in this embodiment of the present invention, since the signal analyzer 102 usually comes with alligator clips or terminals, by setting the second cable fixing seat 3 in the form of a terminal, it is convenient to connect the signal analyzer 102 to it. Since the signal analyzer 102 is on the working platform, there is no need to move or flip it. Connecting it to it in the form of a terminal will not cause the cable to fall off, thereby further improving the ease of operation of the device.

[0048] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising” or “including” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. The terms “connected” or “linked” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0049] The above description is only an optional embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An axial conversion device for a multi-axis accelerometer sensor, comprising a sensor under test (101) and a signal analyzer (102), characterized in that, include: Outer shell (1), One end of the housing (1) is provided with a first cable holder (2), and the other end is provided with a second cable holder (3). The first cable holder (2) is provided with multiple input terminals, which are electrically connected to multiple output terminals of the sensor under test (101). The second cable holder (3) is electrically connected to the input terminal of the signal analyzer (102). An axial adjustment module (4) is provided inside the housing (1). The axial adjustment module (4) includes a line switching device (41), an output contact (42), and multiple input contacts (43). The multiple input contacts (43) are electrically connected to multiple input terminals of the first cable holder (2), and the output contact (42) is electrically connected to the second cable holder (3). The line switching device (41) is used to electrically connect the output contact (42) to one of the input contacts (43).

2. The axial conversion device for a multi-axis accelerometer sensor according to claim 1, characterized in that, The output contact (42) and the input contact (43) are arranged in a circle. The line switching device (41) is a knob. The line switching device (41) is provided with a first contact (411) and a second contact (412). The first contact (411) and the second contact (412) are connected by a wire. The first contact (411) is electrically connected to the output contact (42), and the second contact (412) is electrically connected to one of the input contacts (43).

3. The axial conversion device for a multi-axis accelerometer sensor according to claim 2, characterized in that, The axial adjustment module (4) is equipped with a grounding point.

4. The axial conversion device for a multi-axis accelerometer sensor according to claim 1, characterized in that, The first cable holder (2) is provided with a first power interface (21), and the second cable holder (3) is provided with a second power interface (31). The first power interface (21) includes a first positive power interface (211) and a first negative power interface (212). The second power interface (31) includes a second positive power interface (311) and a second negative power interface (312). The second power interface (31) is electrically connected to a power source. The second positive power interface (311) is electrically connected to the first positive power interface (211). The first negative power interface (212) is electrically connected to the second negative power interface (312). The first power interface (21) is electrically connected to the power supply terminal of the sensor under test (101).

5. The axial conversion device for a multi-axis accelerometer sensor according to claim 4, characterized in that, A main switch (5) is provided between the second power positive interface (311) and the first power positive interface (211).

6. The axial conversion device for a multi-axis accelerometer sensor according to claim 1, characterized in that, The outer casing (1) includes a box body (11) and a box cover (12), which are detachably connected.

7. The axial conversion device for a multi-axis accelerometer sensor according to claim 6, characterized in that, The bottom of the box cover (12) is provided with a pin (121), and the opening surface of the box body (11) is provided with a socket (111) that matches the pin (121).

8. The axial conversion device for a multi-axis accelerometer sensor according to claim 6, characterized in that, The cover (12) is provided with a point mark (122), which matches the input contact (43).

9. The axial conversion device for a multi-axis accelerometer sensor according to claim 1, characterized in that, The first cable holder (2) is provided with a plurality of plug holes (22), the plug holes (22) are electrically connected to the input end of the first cable holder (2), and the output end of the sensor under test (101) is provided with a plug that matches the first cable holder (2).

10. The axial conversion device for a multi-axis accelerometer sensor according to claim 1, characterized in that, The second cable holder (3) is a terminal block.

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