Axial conversion device of multi-axis accelerometer sensor

Abstract

The invention provides an axial conversion device of a multi-axis accelerometer sensor, and belongs to the field of precision instrument testing. The device comprises a detected sensor, a signal analyzer and a shell, one end of the shell is provided with a first cable fixing seat, the other end of the shell is provided with a second cable fixing seat, the first cable fixing seat is provided with a plurality of input ends which are electrically connected with a plurality of output ends of the detected sensor respectively, and the second cable fixing seat is electrically connected with the input end of the signal analyzer. An axial adjusting module is arranged in the shell, the axial adjusting module comprises a line switching device, an output contact and a plurality of input contacts, the input contacts are electrically connected with the input ends of the first cable fixing seat respectively, and the output contact is electrically connected with the second cable fixing seat. By adopting the axial conversion device of the multi-axis accelerometer sensor provided by the embodiment of the invention, the problems of relatively low continuity and relatively low safety in the prior art can be solved.

Description

Technical Field

[0001] The present invention relates to the field of precision instrument testing, and particularly to an axial conversion device for a multi-axis accelerometer sensor. Background Art

[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 motion changes of an object in one-axis, two-axis, or three-axis (such as the X, Y, and Z directions) by detecting inertial forces (caused by acceleration). Some advanced models even support more degrees of freedom (such as 6-axis or 9-axis, combining gyroscopes and magnetometers). After the production of a multi-axis accelerometer sensor is completed, it is usually necessary to detect its sensitivity and accuracy to ensure its accuracy during normal use.

[0003] In the prior art, the detection method for an accelerometer sensor is usually to fix a standard accelerometer sensor and the accelerometer sensor to be measured back-to-back on a calibration table. The sensitive axes of the standard accelerometer sensor and the sensor to be measured coincide and are parallel to the vibration direction. Then, the entire system of the sensor and the calibration table is powered on and preheated for 3 minutes, and the calibration table is adjusted to generate an acceleration of 80 Hz and 10 g. The result is obtained by comparing the voltages with the standard sensor. When the sensor to be measured is a three-axis sensor with three output lines, only one sensitive axis can be measured each time vibration occurs. After each measurement of one path, it is necessary to switch the sensitive axis of the sensor to be measured and connect the acquisition line to the output line of another path of the sensor to be measured through an alligator clip.

[0004] In the detection method of the prior art, after measuring one sensitive axis of the multi-axis acceleration sensor, it is usually necessary for an operator to move the alligator clip of the acquisition line to the output line of another path of the sensor to be measured. The operation is relatively complex, and this wiring method causes the cables to be exposed, resulting in low test continuity and low safety. Summary of the Invention

[0005] An embodiment of the present invention 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 to be measured, a signal analyzer, and a housing.

[0007] One end of the housing is provided with a first cable fixing seat, and the other end is provided with a second cable fixing seat. A plurality of input ends are arranged on the first cable fixing seat and are respectively electrically connected to a plurality of output ends of the sensor under test. The second cable fixing seat is electrically connected to the input end of the signal analyzer. An axial adjustment module is arranged in the housing. The axial adjustment module includes a line switching device, an output contact and a plurality of input contacts. The plurality of input contacts are respectively electrically connected to the plurality of input ends of the first cable fixing seat, the output contact is electrically connected to the second cable fixing seat, and the line switching device is used to electrically connect the output contact to one of the input contacts.

[0008] Optionally, the output contact and the input contacts are distributed in a circumferential manner. The line switching device is a knob. A first contact and a second contact are arranged in the line switching device. 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 ground connection point is arranged in the axial adjustment module.

[0010] Optionally, a first power interface is arranged on the first cable fixing seat, and a second power interface is arranged on the second cable fixing seat. The first power interface includes a first power positive interface and a first power negative interface. The second power interface includes a second power positive interface and a second power negative interface. The second power interface is electrically connected to a power supply. The second power positive interface is electrically connected to the first power positive interface. The first power negative interface is electrically connected to the second power negative interface. The first power interface is electrically connected to the power supply end of the sensor under test.

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

[0012] Optionally, the housing includes a box body and a box cover, and the box body and the box cover are detachably connected.

[0013] Optionally, a plug pin is arranged at the bottom of the box cover, and a jack matching the plug pin is arranged on the opening surface of the box body.

[0014] Optionally, a position marking is arranged on the box cover, and the position marking matches the input contact.

[0015] Optionally, a plurality of plug holes are arranged on the first cable fixing seat. The plug holes are electrically connected to the input ends of the first cable fixing seat. Plug connectors matching the first cable fixing seat are arranged on the output ends of the sensor under test.

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

[0017] The beneficial effects brought by the technical solution provided by the embodiment of the present invention at least include:

[0018] An axial conversion device for a multi-axis accelerometer sensor provided by an embodiment of the present invention connects multiple output ends of a sensor to be measured to multiple input ends of a first cable fixing seat at one time respectively. Through an axial adjustment module, different output ends of the sensor to be measured are communicated with a signal analyzer, that is, an operation line switching device is used to switch different output contacts and input contacts for electrical connection. When testing different sensitive axes of the sensor to be measured, by changing the posture of the sensor to be measured placed on a test platform and controlling the line switching device, the test of different sensitive axes of the sensor to be measured can be completed without re-wiring during the test process. And since the cables are integrated inside the housing, no cables are exposed outside, thereby effectively solving the problems of low continuity and low safety in the prior art. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of the device provided by an embodiment of the present invention;

[0021] Figure 2 It is a schematic diagram of the internal structure of the box body provided by an embodiment of the present invention;

[0022] Figure 3 It is a schematic diagram of the bottom structure of the line switching device provided by an embodiment of the present invention;

[0023] Figure 4 It is a schematic diagram of the circuit connection provided by an embodiment of the present invention;

[0024] Figure 5 It is a schematic diagram of the cooperation between the box body and the box cover provided by an embodiment of the present invention.

[0025] In the figure: 101 - sensor under test; 102 - signal analyzer; 1 - housing; 11 - box body; 111 - jack; 12 - box cover; 121 - bolt; 122 - position identifier; 2 - first cable fixing seat; 21 - first power interface; 211 - first positive power interface; 212 - first negative power interface; 22 - insertion hole; 3 - second cable fixing seat; 31 - second power interface; 311 - second positive power interface; 312 - second negative power interface; 4 - axial adjustment module; 41 - circuit switching device; 411 - first contact; 412 - second contact; 42 - output contact; 43 - input contact; 5 - main switch. Detailed implementation manners

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

[0027] Figure 1 It is a schematic diagram of the overall structure of the device provided by an embodiment of the present invention; Figure 2 It is a schematic diagram of the internal structure of the box body provided by an embodiment of the present invention; Figure 3 It is a schematic diagram of the bottom structure of the circuit switching device provided by an embodiment of the present invention; Figure 4 It is a schematic diagram of the circuit connection provided by an embodiment of the present invention; Figure 5 It is a schematic diagram of the cooperation between the box body and the box cover provided by an embodiment of the present invention. As Figures 1 to 5 shown, an axial conversion device for a multi-axis accelerometer sensor includes a sensor under test 101, a signal analyzer 102, and a housing 1. A first cable fixing seat 2 is provided at one end of the housing 1, and a second cable fixing seat 3 is provided at the other end. A plurality of input ends are provided on the first cable fixing seat 2 and are electrically connected to a plurality of output ends of the sensor under test 101 respectively. The second cable fixing seat 3 is electrically connected to the input end of the signal analyzer 102. An axial adjustment module 4 is provided inside the housing 1. The axial adjustment module 4 includes a circuit switching device 41, an output contact 42, and a plurality of input contacts 43. The plurality of input contacts 43 are electrically connected to the plurality of input ends of the first cable fixing seat 2 respectively. The output contact 42 is electrically connected to the second cable fixing seat 3. The circuit switching device 41 is used to electrically connect the output contact 42 to one of the input contacts 43.

[0028] Exemplarily, in the embodiment of the present invention, during the test, ensure that the test environment is under standard atmospheric conditions. Fix the standard acceleration sensor and the sensor under test 101 back-to-back on the test platform. The sensitive axes of the standard acceleration sensor and the sensor under test coincide and are parallel to the vibration direction. Then, power on and preheat the entire system of the sensor and the calibration table for 3 minutes. Adjust the calibration table to generate an acceleration of 80 Hz and 10 g, and obtain the result by comparing the voltages with the standard sensor. The test platform is an electric vibration test system, usually 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 end 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 starts, connect the three output ends of the sensor under test 101 to the three input ends of the first cable fixing seat 2 respectively. The three input ends of the first cable fixing seat 2 are respectively connected to three input contacts 43. The output contact 42 is connected to the second cable fixing seat 3. The second cable fixing seat 3 is electrically connected to the input end 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, at this time, the sensor under test 101 is switched to the X-axis and placed on the test platform for testing, and the obtained test result is the test result of the X-axis. When it is necessary to continue the Y-axis test, by controlling the line switching device 41 to connect the input contact 43 corresponding to the Y-axis to the output contact 42, at this time, the sensor under test 101 is switched to the Y-axis and placed on the test platform for testing, and the obtained test result is the test result of the Y-axis. Similarly, when it is necessary to continue the Z-axis test, by controlling the line switching device 41 to connect the input contact 43 corresponding to the Z-axis to the output contact 42, at this time, the sensor under test 101 is switched to the Z-axis and placed on the test platform for testing, and the obtained test result is the test result of the Z-axis. That is, by controlling the line switching device 41, it is possible to quickly and continuously test multiple axes of the sensor under test 101. Compared with the traditional technology, each time a test is required, the alligator clip of the data acquisition line of the signal analyzer 102 needs to be connected to the output line of another sensor under test 101. The axial conversion device in this embodiment does not require additional wiring operations, improving the operation convenience and continuity during the test process. Moreover, since the cables are integrated inside the housing 1 and there is no exposed cable outside, the safety during the test process is improved.

[0029] An axial conversion device for a multi-axis accelerometer sensor provided by an embodiment of the present invention connects multiple output terminals of a sensor under test 101 to multiple input terminals of a first cable fixing seat 2 at one time. Through an axial adjustment module 4, different output terminals of the sensor under test 101 are connected to a signal analyzer 102, that is, an operation line switching device 41 switches different output contacts 42 to be electrically connected to input contacts 43. When testing different sensitive axes of the sensor under test 101, by changing the posture of the sensor under test 101 placed on a test platform and controlling the line switching device 41, the test of different sensitive axes of the sensor under test 101 can be completed without re-wiring during the test process. Moreover, since the cables are integrated inside the housing 1, no cables are exposed outside, thereby effectively solving the problems of low continuity and low safety in the prior art.

[0030] Optionally, the output contacts 42 and the input contacts 43 are distributed in a circumferential manner, the line switching device 41 is a knob, a first contact 411 and a second contact 412 are arranged inside the line switching device 41, 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] Exemplarily, in an embodiment of the present invention, as Figure 2 and Figure 3 shown, the output contacts 42 and the input contacts 43 are distributed in a circumferential manner, and the line switching device 41 is set as a knob. The line switching device 41 is equivalent to the function of a wire, fixedly connecting the first contact 411 to the output contact 42. When the line switching device 41 is rotated, the second contact 412 can be connected to one of the input contacts 43, thereby forming a path and enabling 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 into this structure, the test of different sensitive axes of the sensor under test 101 can be realized only by rotating the line switching device 41, thereby further improving the operation convenience of the device.

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

[0033] Exemplarily, in an implementation of the present invention, as Figure 2 shown, the blank parts between the output contacts 42 and the input contacts 43 and between the multiple input contacts 43 are all grounding points. When the line switching device 41 rotates to the grounding point, the second contact 412 is not connected to any input contact 43. At this time, none of the sensitive axes of the sensor under test 101 are connected to the signal analyzer 102, and the device is not being tested at this time. By setting the grounding point, when the device is not being tested, the line switching device 41 is rotated to the grounding point, further improving the operation convenience of the device.

[0034] Optionally, a first power interface 21 is provided on the first cable fixing seat 2, and a second power interface 31 is provided on the second cable fixing seat 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 supply. 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 101 to be measured.

[0035] Exemplarily, in the embodiment of the present invention, as Figure 2 shown, connect the positive pole of the power supply to the second positive power interface 311, connect the negative pole of the power supply to the second negative power interface 312, then connect the power supply terminal on the sensor 101 to be measured to the first positive power interface 211, and connect the grounding terminal to the first negative power interface 212, so as to form a power supply circuit to supply power to this device.

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

[0037] Exemplarily, in the embodiment of the present invention, as Figure 2 and Figure 4 shown, by providing 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 protrude from the box cover 12. By pressing the main switch 5, disconnection or connection can be achieved. By providing this structure, the operation convenience of this device is further improved.

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

[0039] Exemplarily, in the embodiment of the present invention, setting the housing 1 in the form of a box body 11 and a box cover 12 can facilitate the operation and adjustment of the circuit structure inside the box body 11. During testing, the box cover 12 can be covered and fixed on the box body 11 to protect the circuit structure inside the box body 11, thereby further improving the operation convenience of this device.

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

[0041] Exemplarily, in the embodiment of the present invention, as Figure 5As shown, by setting the form of the bolt 121 and the socket 111, the box body 11 and the box cover 12 can be quickly separated or combined, thus realizing the quick disassembly and assembly of the box body 11 and the box cover 12, and further improving the operation convenience of the present device.

[0042] Optionally, a dot position identifier 122 is arranged on the box cover 12, and the dot position identifier 122 is matched with the input contact 43.

[0043] Exemplarily, in the embodiment of the present invention, as Figure 1 shown, on one side of the input contacts 43 connecting the sensitive axes X, Y, and Z of the measured sensor 101, corresponding "X, Y, Z" identifiers are arranged, and a corresponding "OFF" identifier is also arranged on the ground connection side. By setting the dot position identifier 122, the operator can conveniently adjust the position of the line switching device 41 according to the dot position identifier 122 during the test process, thereby further improving the operation convenience of the present device.

[0044] Optionally, a plurality of socket holes 22 are arranged on the first cable fixing seat 2, and the socket holes 22 are electrically connected to the input end of the first cable fixing seat 2. An insertion head matching the first cable fixing seat 2 is arranged on the output end of the measured sensor 101.

[0045] Exemplarily, in the embodiment of the present invention, as Figure 1 and Figure 4 shown, the first cable fixing seat 2 is set in the form of socket holes 22, and an insertion head matching the first cable fixing seat 2 is arranged on the output end of the measured sensor 101, so that the insertion head and the socket holes 22 are matched, and the operation is more convenient. Compared with the form of using alligator clips in the traditional technology, the structure in this embodiment can make the cable inside the insertion head and the socket holes 22 without being exposed outside, thereby improving the safety of the present device. When the measured sensor 101 performs multi-axis tests and needs to be flipped in different directions, the alligator clip may fall off during the flipping process, while the insertion is more stable for the connection of the circuit compared with clamping the alligator clip.

[0046] Optionally, the second cable fixing seat 3 is a terminal post.

[0047] Exemplarily, in the embodiment of the present invention, since the signal analyzer 102 usually comes with alligator clips or terminal posts, by setting the second cable fixing seat 3 in the form of a terminal post, it can be convenient for the signal analyzer 102 to be connected to it, and the signal analyzer 102 is on the working platform without the need for moving or flipping operations, and the form of using a terminal post to connect to it will not cause the cable to fall off, thereby further improving the operation convenience of the present device.

[0048] Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meanings as understood by those of ordinary skill in the art to which this invention pertains. The terms "first", "second" and similar terms used in the description and claims of this patent application for invention do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, terms such as "a" or "an" do not denote a quantity limitation, but mean that there is at least one. Terms such as "comprising" or "including" mean that the elements or items appearing before "comprising" or "including" cover the elements or items listed after "comprising" or "including" and their equivalents, and do not exclude other elements or items. Terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Terms such as "upper", "lower", "left" and "right" are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationships may also change accordingly.

[0049] The above are only alternative embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

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, Comprising: A housing (1), One end of the housing (1) is provided with a first cable fixing base (2), and the other end is provided with a second cable fixing base (3). A plurality of input ends are provided on the first cable fixing base (2), which are respectively electrically connected to a plurality of output ends of the sensor under test (101). The second cable fixing base (3) is electrically connected to the input end of the signal analyzer (102). An axial adjustment module (4) is arranged inside the housing (1). The axial adjustment module (4) includes a line switching device (41), an output contact (42) and a plurality of input contacts (43). The plurality of input contacts (43) are respectively electrically connected to the plurality of input ends of the first cable fixing base (2). The output contact (42) is electrically connected to the second cable fixing base (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 of a multi-axis accelerometer sensor according to claim 1, characterized in that, The output contact (42) and the input contacts (43) are distributed in a circumferential manner. The line switching device (41) is a knob. A first contact (411) and a second contact (412) are arranged inside the line switching device (41). 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 of a multi-axis accelerometer sensor according to claim 2, characterized in that, A grounding point is arranged inside the axial adjustment module (4).

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

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

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

7. The axial conversion device of a multi-axis accelerometer sensor according to claim 6, characterized in that, A plug pin (121) is arranged at the bottom of the box cover (12), and a jack (111) matching the plug pin (121) is arranged on the opening surface of the box body (11).

8. The axial conversion device of a multi-axis accelerometer sensor according to claim 6, characterized in that, A point position identifier (122) is arranged on the box cover (12), and the point position identifier (122) matches the input contacts (43).

9. The axial conversion device of a multi-axis accelerometer sensor according to claim 1, characterized in that, A plurality of insertion holes (22) are provided on the first cable fixing seat (2), and the insertion holes (22) are electrically connected to the input end of the first cable fixing seat (2). An insertion head matching the first cable fixing seat (2) is provided on the output end of the sensor under test (101).

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

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