CN117091645A - Collecting and testing device for engine body load data - Google Patents
Collecting and testing device for engine body load data Download PDFInfo
- Publication number
- CN117091645A CN117091645A CN202310734125.6A CN202310734125A CN117091645A CN 117091645 A CN117091645 A CN 117091645A CN 202310734125 A CN202310734125 A CN 202310734125A CN 117091645 A CN117091645 A CN 117091645A
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- 238000012360 testing method Methods 0.000 title claims abstract description 92
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 230000003750 conditioning effect Effects 0.000 claims description 16
- 238000009413 insulation Methods 0.000 claims description 12
- 238000013461 design Methods 0.000 claims description 3
- 238000002955 isolation Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
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- 238000003745 diagnosis Methods 0.000 description 1
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- 238000012827 research and development Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
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- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to the technical field of maintenance and test of aviation equipment, in particular to a device for collecting and testing machine body load data, which comprises a test cabinet; the bridge source box is arranged on the test cabinet and is used for providing 32 paths of independent bridge sources for the test device; the data testing machine box is arranged on the testing machine cabinet and is used for carrying out system detection on the sticking condition of the single strain gauge after sticking and the strain gauge after bridging; the KVM is arranged on the test cabinet and is a display structure of the test device; and the cable and the accessories are used for connecting all the structural components in the testing device. The invention has the function of supporting self-calibration of the full channel self-detection, can diagnose the channel functional correctness in real time, and prevents the system test data error caused by channel faults; the device can prevent the influence of interference signals such as a frequency converter and electromagnetism on detection sites on detection equipment, has an isolation function on the input of all signals, can ensure that the device has no influence on external systems, and can prevent the end-to-end reflection of the signals.
Description
Technical Field
The invention relates to the technical field of maintenance and test of aviation equipment, in particular to a device for collecting and testing machine body load data.
Background
The key organism load data is an important basis for judging the organism structural state of the advanced aviation equipment, the advanced aviation equipment records the strain data of the key structure by utilizing a load sensor, performs data ground playback and analysis on the strain data of the key structure by ground data processing software, combines a load equation obtained by ground calibration, and returns to obtain the load born by each typical part in flight, and adopts a mature fatigue damage assessment theory and method to perform structural damage assessment and service life assessment on the basis of a flight parameter-load-key part stress model, and adopts actual measurement of the load of the key structure as an auxiliary measure to improve monitoring and prediction reliability. The performance of the load sensor must be detected in detail during the repair of advanced aviation equipment, and the comprehensiveness, stability and accuracy of the detection equipment test are important.
The digital technology and application volume 10, 7 (release date 2016, 6 month) release a paper of a portable data acquisition test system, and hardware equipment designed in the paper comprises an industrial personal computer, a system controller, a temperature acquisition device, an analog quantity acquisition device, a switching value acquisition device, a rotating speed acquisition device, an adaptation interface and the like, and mainly completes the work of signal conditioning, data acquisition, processing, transmission and the like. The paper has the problems that a TCP/IP communication mode is adopted, an upper computer transmits a control command to a lower computer through a TCP/IP protocol to start acquisition, acquired data is written into a queue, the data is uploaded again through the TCP protocol, and the data transmission speed of a shared variable is low.
The technological innovation guide 2017 discloses a paper of 'design and implementation of a distributed data acquisition test system' in the 16 th period, wherein the designed system adopts an ATE structure mode of combining an industrial standard PCI/PXI industrial personal computer and a conditioning case, and the system consists of a test computer host, signal conditioning equipment, signal acquisition equipment, a test cabinet, a test host, a test server and the like, and is mainly used for completing the work of acquisition, storage, processing and the like of parameters in the test process of a cabin comprehensive environment test room. The method has the defects that the functions of full-system self-detection, self-calibration, channel fault diagnosis and the like are difficult to realize by adopting the structure of the traditional PCI/PXI industrial personal computer and a conditioning case.
Disclosure of Invention
In order to solve the technical problems, the invention provides a device for acquiring and testing body load data. The strain signal of the machine body is converted, isolated, subjected to analog filtering and digital filtering, and tested and verified, so that whether the tested load sensor works normally and stably is judged.
The technical problems to be solved by the invention are realized by adopting the following technical scheme:
an acquisition testing device for body load data, comprising:
a test cabinet;
the bridge source box is arranged on the test cabinet and is used for providing 32 paths of independent bridge sources for the test device;
the data testing machine box is arranged on the testing machine cabinet and is used for carrying out system detection on the sticking condition of the single strain gauge after sticking and the strain gauge after bridging;
the KVM is arranged on the test cabinet and is of a telescopic design and is a display structure of the test device;
and the cable and the accessories are used for connecting all the structural components in the testing device.
Preferably, the bridge source box adopts a board card structure, and 3 paths of 10V bridge source voltages are arranged in each board card.
Preferably, the data testing chassis includes 32 testing channels.
Preferably, the test chassis comprises a host system, a relay array, a conditioning system, a collection system, and an insulation resistance test system.
Preferably, the host system is a CPU board.
Preferably, the relay array is used for testing channel switching.
Preferably, the conditioning system is an analog conditioning module having a calibration/self-test loop.
Preferably, the acquisition system is an AD acquisition module.
Preferably, the insulation resistance testing system is used for testing the insulation resistance between the strain gauge and the body.
The beneficial effects of the invention are as follows:
compared with the prior art, the invention has the function of supporting self-calibration of the full channel self-test, can diagnose the channel function correctness in real time, and prevents the system test data error caused by channel faults; the device can prevent the influence of interference signals such as a frequency converter and electromagnetism on detection sites on detection equipment, has an isolation function on the input of all signals, can ensure that the device has no influence on external systems, and can prevent the end-to-end reflection of the signals.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a schematic diagram of a front view of the present invention;
fig. 2 is a schematic bottom view of the present invention.
Detailed Description
In order that the manner in which the invention is attained, as well as the features and advantages thereof, will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings.
As shown in figures 1 to 2 of the drawings,
a machine body load data acquisition and test device comprises a test cabinet, a bridge source box, a data test cabinet, a KVM, a cable, accessories and the like.
The size of the test cabinet is 19 inches, and the test cabinet is used for realizing intensive racking of instrument resources, providing a cable laying space and ensuring compact and stable whole device. The measurement and control system of the whole testing device adopts an LXI architecture, and a research and development industrial control computer is selected as a control and test data processing center for improving the anti-interference capability of the system and enhancing the flexibility of system configuration.
The bridge source box is arranged on the test cabinet and is used for providing 32 paths of independent bridge sources for the detection device, the bridge source box adopts a board card structure, each path of bridge sources are mutually isolated, each board card has 3 paths of 10V bridge source voltages, and the bridge source box can be zeroed by hardware; the voltage of the bridge source is regulated in a closed loop, and the voltage which is output to the sensor end is kept unchanged by 10V; the accuracy of the bridge source is kept within +/-1 percent; the bridge source box has the functions of overcurrent and long-time short circuit protection.
The data test machine case is arranged on the test machine cabinet and comprises 32 test channels, and each test channel can independently and semi-automatically measure the resistance before and after the strain gauge is pasted, the insulation resistance of the strain gauge and the machine body and the measurement of zero offset after the bridge is assembled. Specifically, the data testing machine case comprises a host system, a relay array, a conditioning system, an acquisition system and an insulation resistance testing system. In this embodiment, the host system is a CPU board, and the CPU board controls the relay array to select a single strain gauge or a group of strain gauge bridges to measure the resistance value of the corresponding points, and adds the bridge source to the strain gauge bridges through the relay array to measure the zero offset of the strain gauges; the sticking condition of the strain gauges of 32 channels is detected sequentially through switching the relay array. In this embodiment, the conditioning system is an analog conditioning module, each analog conditioning module may introduce 3 channel signals, and each channel has an independent bridge source and a protection circuit, and also has a calibration/self-checking loop. In this embodiment, the acquisition system is an AD acquisition module, where the AD acquisition modules are isolated and have an input impedance up to 1gΩ, and have 2500V input-output isolation protection and continuous input protection of 50VDC for 5 s. The insulation resistance test system is used for testing insulation resistance between the strain gauge and the machine body on each test channel.
The KVM is arranged on the test cabinet, and is a display part of the test device, and is designed in a telescopic way.
The cable and the accessory comprise signal acquisition and bridge source cables, 55 # electric wire cables of Raychem (Ruiyan) are selected, various signal wires are separated as far as possible in the manufacturing process of the cables so as to reduce cross linking among all test cables, aviation jackets are added to the outside of the whole cable bundle, a better protection effect is achieved, and each cable is correspondingly marked to prevent misplug. In order to facilitate the expansion and modification of the system, the empty needle part of the adapter is pre-laid with the cable as a standby channel in the manufacturing process of the cable. The signal acquisition and bridge source cable 4 bundles are composed of 32 shielding wire cables, and each channel can be detached or connected independently and has the characteristics of oil stain resistance and the like.
The working principle and the using flow of the invention are as follows:
the bridge source box provides a bridge source for 32 strain gauges, the CPU board card controls the relay array to sequentially detect the sticking condition of the strain gauges corresponding to 32 test channels after the strain gauges are connected, the insulation resistance test system is used for testing the insulation resistance value between the strain gauges and the machine body, then the disconnection/short circuit condition is judged, the zero offset after the strain gauges are assembled by the bridge source box and the bridge source rear acquisition system is used for measuring zero offset, and because the zero offset is mv signal, the acquisition system can perform signal processing after conditioning by the conditioning system, and finally the test result is sent to the CPU board card and displayed by the KVM.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. The utility model provides a collection testing arrangement of organism load data which characterized in that: comprising the following steps:
a test cabinet;
the bridge source box is arranged on the test cabinet and is used for providing 32 paths of independent bridge sources for the test device;
the data testing machine box is arranged on the testing machine cabinet and is used for carrying out system detection on the sticking condition of the single strain gauge after sticking and the strain gauge after bridging;
the KVM is arranged on the test cabinet and is of a telescopic design and is a display structure of the test device;
and the cable and the accessories are used for connecting all the structural components in the testing device.
2. The device for collecting and testing body load data according to claim 1, wherein: the bridge source box adopts a board card structure, and 3 paths of 10V bridge source voltages are arranged in each board card.
3. The device for collecting and testing body load data according to claim 1, wherein: the data testing chassis includes 32 testing channels.
4. The device for collecting and testing body load data according to claim 1, wherein: the test case comprises a host system, a relay array, a conditioning system, an acquisition system and an insulation resistance test system.
5. The device for collecting and testing body load data according to claim 4, wherein: the host system is a CPU board card.
6. The device for collecting and testing body load data according to claim 4, wherein: the relay array is used for switching the test channels.
7. The device for collecting and testing body load data according to claim 4, wherein: the conditioning system is an analog quantity conditioning module and is provided with a calibration/self-checking loop.
8. The device for collecting and testing body load data according to claim 4, wherein: the acquisition system is an AD acquisition module.
9. The device for collecting and testing body load data according to claim 4, wherein: the insulation resistance testing system is used for testing insulation resistance between the strain gauge and the machine body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310734125.6A CN117091645A (en) | 2023-06-20 | 2023-06-20 | Collecting and testing device for engine body load data |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310734125.6A CN117091645A (en) | 2023-06-20 | 2023-06-20 | Collecting and testing device for engine body load data |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117091645A true CN117091645A (en) | 2023-11-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310734125.6A Pending CN117091645A (en) | 2023-06-20 | 2023-06-20 | Collecting and testing device for engine body load data |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117091645A (en) |
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2023
- 2023-06-20 CN CN202310734125.6A patent/CN117091645A/en active Pending
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