CN220583670U - Dynamic force calibration device - Google Patents
Dynamic force calibration device Download PDFInfo
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- CN220583670U CN220583670U CN202322344320.6U CN202322344320U CN220583670U CN 220583670 U CN220583670 U CN 220583670U CN 202322344320 U CN202322344320 U CN 202322344320U CN 220583670 U CN220583670 U CN 220583670U
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- 238000009661 fatigue test Methods 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000013112 stability test Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
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Abstract
The utility model discloses a dynamic force calibration device; comprising the following steps: the first half-bridge rectangular strain gauge, the second half-bridge rectangular strain gauge, a dynamic force sensor and a collector, wherein the dynamic force sensor comprises: the connector at both ends and central bearing main body are made to an organic whole, and dynamic force sensor passes through the connector and installs on high frequency fatigue testing machine, and first half-bridge rectangular strainometer and second half-bridge rectangular strainometer all paste the central point of bearing main body length in dynamic force sensor, and first half-bridge rectangular strainometer and second half-bridge rectangular strainometer link to each other with collector integrated circuit interface. The utility model applies the half-bridge right-angle strain gauge and the new wiring mode in the dynamic force calibration technology, so that the volume of the dynamic force calibration device is reduced.
Description
Technical Field
The utility model belongs to the technical field of calibration of analysis and detection equipment, and particularly relates to a dynamic force calibration device.
Background
The dynamic force calibration technology is continuously expanded in the application range of practical engineering, almost relates to various fields of building engineering, transportation, machining, instruments and meters and the like, and particularly, in the development and production processes of aircrafts and weaponry, the requirement of measuring the dynamic force of materials is increased, and the calibration of the dynamic force of a material tester is also increased.
Dynamic force calibration generally adopts a piezoelectric type force sensor and a resistance strain type force sensor with good dynamic characteristics as transmission standards. In general, the dynamic force value of the fatigue testing machine is measured in a range of 1 kN-1 MN, and the working frequency is within 500 Hz. Therefore, a force sensor with larger rated force value, higher rigidity and better middle-low frequency characteristic is selected as a standard force sensor. According to the principle, the utility model selects the resistance strain type force sensor with good dynamic characteristics.
In the calibration process, the high-frequency fatigue testing machine generates vibration by adopting the electromagnetic resonance principle, so that the frequency of the collected waveform is overlarge, the calibration space is limited, and the sensor for dynamic force calibration needs to keep certain rigidity and strain measurement space, so that the problem of insufficient calibration space exists.
Disclosure of Invention
In view of the problems existing in the background art, the present utility model provides a dynamic force calibration device, which is characterized by comprising: the first half-bridge rectangular strain gauge, the second half-bridge rectangular strain gauge, a dynamic force sensor and a collector, wherein the dynamic force sensor comprises: the dynamic force sensor is arranged on the high-frequency fatigue testing machine through the connectors, and the setting directions of the first half-bridge right-angle strain gauge and the second half-bridge right-angle strain gauge are mirror-inverted relative to the axis of the bearing main body; the first half-bridge right-angle strain gauge and the second half-bridge right-angle strain gauge are connected with the collector board card interface.
The bearing body is of a solid column structure, and is made of an A100 alloy.
The diameter of the bearing main body is 14mm.
The diameter of the bearing main body is 15mm.
The connector is an M16 external thread.
The connector is an M22 external thread.
The mode that first half-bridge right angle strainometer and second half-bridge right angle strainometer link to each other with collector integrated circuit board interface is:
the anodes of the first half-bridge right-angle strain gauge and the second half-bridge right-angle strain gauge are connected with a half-bridge circuit connecting terminal EX+ of the plate card interface of the collector through a third node, and the third node is also connected with the half-bridge circuit connecting terminal RS+; the cathodes of the first half-bridge right-angle strain gauge and the second half-bridge right-angle strain gauge are connected with a half-bridge circuit connecting terminal EX-of a plate card interface of the collector through a fourth node, and the fourth node is also connected with a half-bridge circuit connecting terminal RS-; the positive pole and the negative pole of the first half-bridge right-angle strain gauge and the second half-bridge right-angle strain gauge are connected through a first node, and the first node is respectively connected with a half-bridge circuit connecting terminal AI+ and a half-bridge circuit connecting terminal QTR/SC through a second node;
the utility model has the beneficial effects that: the utility model is mainly used for calibrating the dynamic force of the high-frequency fatigue testing machine, and the volume of the dynamic force calibrating device is reduced and the dynamic force calibrating device is easy to carry due to the application of the half-bridge right-angle strain gauge and a new wiring mode in the dynamic force calibrating technology; the high-frequency fatigue testing machine has small space and can not bear the requirement of carrying out dynamic test on an oversized dynamic force sensor.
Drawings
FIG. 1 is a schematic diagram of a dynamic force calibration device according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a structure around a rectangular strain gauge attached to a first half bridge in an embodiment of the present utility model;
fig. 3 is a bridge overlap diagram of an embodiment of the present utility model.
Wherein: the device comprises a first half-bridge right-angle strain gauge, a second half-bridge right-angle strain gauge, a 3-dynamic force calibration device, a 4-high-frequency fatigue testing machine, a 5-collector, a 11-first node, a 12-second node, a 13-third node, a 14-fourth node, a 15-positive electrode and a 16-negative electrode.
Detailed Description
The present utility model will be described in further detail with reference to the accompanying drawings.
The embodiment of the present utility model as shown in fig. 1 and 2 includes: the dynamic force sensor 3 comprises connectors at two ends and a central bearing main body, wherein the dynamic force sensor 3 is integrally manufactured, the dynamic force sensor 3 is arranged on the high-frequency fatigue testing machine 4 through the connectors, and the first half-bridge right-angle strain gauge 1 and the second half-bridge right-angle strain gauge 2 are adhered to the central position of the bearing main body in the dynamic force sensor 3 in the length direction (usually in the axial direction); the arrangement direction of the first half-bridge rectangular strain gauge 1 and the second half-bridge rectangular strain gauge 2 is mirror-inverted relative to the axis of the bearing main body, and therefore the first half-bridge rectangular strain gauge 1 and the second half-bridge rectangular strain gauge 2 are positioned on the same radial line (0-degree position and 180-degree position respectively) of the central position;
the first half-bridge right-angle strain gauge 1 and the second half-bridge right-angle strain gauge 2 are connected with a board interface of the collector 5; the specific mode is as shown in fig. 3: the positive electrodes 15 of the first half-bridge rectangular strain gauge 1 and the second half-bridge rectangular strain gauge 2 are connected with a half-bridge circuit connecting terminal EX+ of the board clamping interface of the collector 5 through a third node 13, and the negative electrodes 16 of the first half-bridge rectangular strain gauge 1 and the second half-bridge rectangular strain gauge 2 are connected with a half-bridge circuit connecting terminal EX-of the board clamping interface of the collector 5 through a fourth node 14; the positive electrode 15 and the negative electrode 16 of the first half-bridge rectangular strain gauge 1 and the second half-bridge rectangular strain gauge 2 are connected through a first node 11, the first node 11 is connected with a half-bridge circuit connecting terminal AI+ and a half-bridge circuit connecting terminal QTR/SC through a second node 12 respectively, the fourth node 14 is also connected with a half-bridge circuit connecting terminal RS-, and the third node 13 is also connected with the half-bridge circuit connecting terminal RS+.
In this embodiment, the first half-bridge rectangular strain gauge 1 and the second half-bridge rectangular strain gauge 2 are both BE120-2BC strain gauges.
In this embodiment, the collector used is a PXle1071 collector with LabView collection software, and the board card used by the PXle1071 collector is a collection board PXle4331.
In this embodiment, the connector is applicable to two dynamic force sensors 3, the specification of the connector is an external thread of M16 or M22, and the bearing main body of the dynamic force sensor is a cylinder with a diameter of 14mm or 15mm respectively.
In this embodiment, in order to ensure the rigidity of the dynamic force sensor 3, the force-bearing main body is of a solid column structure, the a100 alloy is selected as the force-bearing main body material of the sensor according to the expected use force value range of the sensor, the material selected by the sensor is reinforced and evaluated through heat treatment and mechanical property tests, the mechanical processing technology is adjusted to improve the stability of the material, and the reliability of the type selection and the pasting method of the resistance strain gauge is evaluated through an environmental reliability experiment to determine the applicability of the sensor. And (3) a calibration method for determining the force value of the calibrating device by using a force standard machine, and configuring parameters of the collector. Specific:
when designing, the design is as follows: (1) the materials selected for the solid column type sensor are reinforced and evaluated through heat treatment and mechanical property experiments, and the mechanical processing technology is adjusted to improve the stability of the materials. (2) And selecting strain gauges, determining the pasting mode of the strain gauges, and connecting the bridge circuits of the strain gauges and the matching mode of the collectors.
When in installation test: (1) two half-bridge rectangular strain gauges (a first half-bridge rectangular strain gauge 1 and a second half-bridge rectangular strain gauge 2) are adhered to the same radial line on two sides of a dynamic force sensor main body; (2) and evaluating the reliability of the model selection and the pasting method of the resistance strain gauge through an environment reliability experiment. (3) The bridge circuit is connected to the collector in a bridging way, each group of strain gauges are bridged by the bridge circuit, and 6 signal wires are connected to the channels of the collector board interface respectively; collecting and converting the signals into force value signals through software to form sine waveforms; (4) a calibration method for determining a force value of a calibration device by using a force standard machine, and configuring parameters of a collector; correcting the coefficient of pulling and pressing to the collector after calibration; (6) and (5) performing a stability test of the dynamic force calibration device. (6) After passing the stability test, the test piece was put into use.
When in use, the utility model is characterized in that: the dynamic force setting and running are carried out through the high-frequency fatigue testing machine software, the first half-bridge right-angle strain gauge 1 and the second half-bridge right-angle strain gauge 2 are connected with the collector and collect data of a force bearing main body in the dynamic force sensor 3, and whether the dynamic force of the high-frequency fatigue testing machine meets the regulation requirement is judged through observing peaks and valleys of sine waves and dynamic force.
Claims (7)
1. A dynamic force calibration device, comprising: the device comprises a first half-bridge rectangular strain gauge (1), a second half-bridge rectangular strain gauge (2), a dynamic force sensor (3) and a collector (5), wherein the dynamic force sensor (3) comprises: the dynamic force sensor (3) is arranged on the high-frequency fatigue testing machine (4) through the connector, the first half-bridge right-angle strain gauge (1) and the second half-bridge right-angle strain gauge (2) are adhered to the central position of the length of the bearing body in the dynamic force sensor (3), and the setting directions of the first half-bridge right-angle strain gauge (1) and the second half-bridge right-angle strain gauge (2) are mirror-inverted relative to the axis of the bearing body; the first half-bridge right-angle strain gauge (1) and the second half-bridge right-angle strain gauge (2) are connected with a board card interface of the collector (5).
2. A dynamic force calibration device according to claim 1, wherein the force-bearing body is of solid column construction and the material is an a100 alloy.
3. A dynamic force calibration device according to claim 2, wherein the diameter of the force-bearing body is 14mm.
4. A dynamic force calibration device according to claim 2, wherein the diameter of the force-bearing body is 15mm.
5. A dynamic force calibration device according to one of claims 1 to 4, wherein the connection head is an M16 external thread.
6. A dynamic force calibration device according to one of claims 1 to 4, wherein the connection head is an M22 external thread.
7. A dynamic force calibration device according to one of claims 1 to 4, wherein the first half-bridge right angle strain gauge (1) and the second half-bridge right angle strain gauge (2) are connected to the board interface of the collector (5) in the following manner:
the positive electrodes (15) of the first half-bridge right-angle strain gauge (1) and the second half-bridge right-angle strain gauge (2) are connected with a half-bridge circuit connecting terminal EX+ through a third node (13), and the third node (13) is also connected with the half-bridge circuit connecting terminal RS+; the cathodes (16) of the first half-bridge rectangular strain gauge (1) and the second half-bridge rectangular strain gauge (2) are connected with a half-bridge circuit connecting terminal EX-through a fourth node (14), and the fourth node (14) is also connected with a half-bridge circuit connecting terminal RS-; the positive electrode (15) and the negative electrode (16) of the first half-bridge rectangular strain gauge (1) and the second half-bridge rectangular strain gauge (2) are connected through a first node (11), and the first node (11) is connected with a half-bridge circuit connecting terminal AI+ and a half-bridge circuit connecting terminal QTR/SC through a second node (12) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322344320.6U CN220583670U (en) | 2023-08-30 | 2023-08-30 | Dynamic force calibration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322344320.6U CN220583670U (en) | 2023-08-30 | 2023-08-30 | Dynamic force calibration device |
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| Publication Number | Publication Date |
|---|---|
| CN220583670U true CN220583670U (en) | 2024-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322344320.6U Active CN220583670U (en) | 2023-08-30 | 2023-08-30 | Dynamic force calibration device |
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|---|---|
| CN (1) | CN220583670U (en) |
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2023
- 2023-08-30 CN CN202322344320.6U patent/CN220583670U/en active Active
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