CN213422580U - Miniature impact resistance device - Google Patents
Miniature impact resistance device Download PDFInfo
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- CN213422580U CN213422580U CN202022534420.1U CN202022534420U CN213422580U CN 213422580 U CN213422580 U CN 213422580U CN 202022534420 U CN202022534420 U CN 202022534420U CN 213422580 U CN213422580 U CN 213422580U
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Abstract
The utility model provides a miniature impact resistance device, including sensor, AD converter, embedded controller and memory, the sensor is used for receiving the signal of being surveyed, then the data of sensor send the AD converter after the signal conditioning and convert, and digital signal after the conversion passes through the embedded controller and saves to the memory, and the embedded controller is after gathering the end data transmission in the memory to PC host computer and is follow-up data processing, the sensor includes acceleration sensor, pressure sensor and strain transducer. The utility model discloses use embedded observing and controlling circuit as the main part, testing arrangement is small, the low power dissipation, stand-by time are long, adopt built-in battery powered, can normally work under adverse circumstances such as high temperature, high pressure, high impact, high overload to can gather in real time and save the record to being surveyed the signal.
Description
Technical Field
The utility model relates to a testing arrangement especially relates to a miniature impact resistance device.
Background
When the aeroelastic model is tested in a high-speed wind tunnel, the corresponding data signal acquisition needs a related device, has the functions of miniature impact resistance and storage, is convenient to install in an inner cavity of the test model, and is used for monitoring and processing vibration signals and pulsating pressure signals in the wind tunnel test process in real time on line (during the test).
SUMMERY OF THE UTILITY MODEL
The utility model provides a miniature impact resistance device for solve the problem of vibration signal, the pulsating pressure signal real-time supervision and processing of measurand in the wind tunnel test process, its technical scheme as follows:
a miniature impact resistance device comprises a sensor, an A/D converter, an embedded controller and a memory, wherein the sensor is used for receiving a measured signal, then the data of the sensor is sent to the A/D converter for conversion after signal conditioning, the converted digital signal is stored in the memory through the embedded controller, the embedded controller sends the data in the memory to a PC upper computer for subsequent data processing after the acquisition is finished, and the sensor comprises an acceleration sensor, a pressure sensor and a strain sensor.
The A/D converter adopts an ADS8688IDBT chip.
The acceleration sensor adopts an ADXL372 chip adopting ADI.
The miniature impact resistance device is provided with a threshold value of an acceleration sensor.
The embedded controller adopts STM32 as a main control chip.
The acceleration sensor, the pressure sensor and the strain sensor are all MEMS sensors.
A signal conditioning circuit is arranged between the sensor and the A/D converter and comprises 16 signal conditioning and collecting channels, wherein 9 channels are used for collecting acceleration signals of the acceleration sensor, 3 channels are used for collecting pulsating pressure signals of the pressure sensor, and 4 channels are used for collecting strain signals of the strain sensor.
The utility model provides a miniature impact resistance device is a data acquisition and storage recorder to embedded observing and controlling circuit is the main part, and testing arrangement is small, low power dissipation, stand-by time are long, adopt built-in battery power supply, can be at high temperature, high pressure, high impact, high adverse circumstances such as transship under normal work, and can gather in real time and save the record to being surveyed the signal. The device can be used for dynamic storage testing, field real-time acquisition and recording are realized, recording instruments are recovered afterwards, and tested information is reproduced through processing.
Drawings
FIG. 1 is a schematic circuit diagram of the miniature impact resistance device;
FIG. 2 is a schematic diagram of a data acquisition chip;
fig. 3 is a schematic diagram of a pulsating pressure signal processing circuit.
Fig. 4 is a schematic diagram of the controller.
Detailed Description
As shown in fig. 1, the micro impact resistance device includes a sensor, an a/D converter, an embedded controller and a memory, the sensor is used for receiving a signal to be measured, then the data of the sensor is conditioned and sent to the a/D converter for conversion, the converted digital signal is stored in the memory through the embedded controller, and the embedded controller sends the data in the memory to a PC upper computer for subsequent data processing after the acquisition is finished.
The sensor includes acceleration sensor, pressure sensor and strain sensor, like this, the utility model discloses utilize the acceleration sensor of high accuracy to detect the acceleration, utilize pressure sensor to detect pulsating pressure, utilize strain sensor to detect the displacement data of the device windward side, adopt embedded controller to carry out the collection storage of data, calculate the required parameter that shocks resistance according to the data collection.
As shown in FIG. 2, the A/D converter adopts an ADS8688IDBT chip and can collect data and perform A/D conversion.
The miniature impact resistance device adopts an internal triggering mode, and when the acceleration value collected in the working environment exceeds the acceleration threshold value set by a user, the device starts to work.
The acceleration chip is ADXL372 of ADI for gather service environment's acceleration value, can the direct soldering on the circuit board, and the digital signal of its output passes through embedded controller and compares with the acceleration threshold value that the user set for. The acceleration value detected as a trigger is not stored, but is only used for judgment.
And the acceleration threshold set by the user is stored in a memory.
After the miniature impact resistance device starts to work, signal sampling is carried out through the sensor, and the collected signals are divided into three types: acceleration, pulsating pressure, strain signal. And the sampling signal is transmitted to the interior of the embedded controller after passing through the A/D converter, and the data is directly stored in the SRAM. When the data is stored in one page, the data is transferred to the external EMMC, and after the data recording time is up, the system enters a low power consumption mode, thereby completing a complete test process. The data in the external EMMC is then read to the computer via the data line via the data interface for post-processing.
As shown in fig. 3, data collected by the pressure sensor may be subjected to data conditioning by a pulsating pressure signal processing circuit, and the pulsating pressure signal processing circuit may be disposed at a position of the signal conditioning circuit.
As shown in fig. 4, the embedded controller uses STM32 as a main control chip.
The acceleration sensor, the pressure sensor and the strain sensor all adopt MEMS sensors, and the MEMS sensors, namely micro electro Mechanical Systems (micro electro Mechanical Systems), have the characteristics of small volume, light weight, low cost, low power consumption, high reliability, suitability for batch production, easiness in integration and intelligentization compared with the traditional sensors. At the same time, feature sizes on the order of microns make it possible to perform functions that some conventional mechanical sensors cannot achieve.
After the acceleration sensor, the pressure sensor and the strain sensor stop working, the power can be cut off to enter a standby mode, the standby mode is used for detecting any direction by a built-in accelerometer, and if the acceleration value continuously exceeds a set threshold value within a certain time, the acquisition is started; and stopping the acquisition if the acceleration value is continuously lower than the set threshold acceleration value within a certain time.
The signal conditioning circuit comprises 16 signal conditioning and collecting channels, wherein 9 channels are used for collecting acceleration signals, 3 channels are used for collecting pulsating pressure signals, and 4 channels are used for collecting strain signals.
The utility model can work normally under severe environments such as high pressure, high impact, high overload and the like, can acquire and store and record the measured signal in real time, and has reliable use, durability, convenient use and easy maintenance; the installation and the fixed arrangement do not cause structural damage to the tunnel body and the factory building of the wind tunnel; the overall performance is excellent, and the requirements of functionality, safety and usability are met; the cost factor is fully considered, the use cost is saved, and the economical efficiency of the equipment is improved.
Claims (7)
1. A miniature impact resistance device which characterized in that: the sensor is used for receiving a measured signal, then the data of the sensor is sent to the A/D converter for conversion after signal conditioning, the converted digital signal is stored in the memory through the embedded controller, the embedded controller sends the data in the memory to a PC upper computer for subsequent data processing after collection is finished, and the sensor comprises an acceleration sensor, a pressure sensor and a strain sensor.
2. A miniature impact resistance device as claimed in claim 1, wherein: the A/D converter adopts an ADS8688IDBT chip.
3. A miniature impact resistance device as claimed in claim 1, wherein: the acceleration sensor employs ADXL372 from ADI.
4. A miniature impact resistance device as claimed in claim 1, wherein: the miniature impact resistance device is provided with a threshold value of an acceleration sensor.
5. A miniature impact resistance device as claimed in claim 1, wherein: the embedded controller adopts STM32 as a main control chip.
6. A miniature impact resistance device as claimed in claim 1, wherein: the acceleration sensor, the pressure sensor and the strain sensor are all MEMS sensors.
7. A miniature impact resistance device as claimed in claim 1, wherein: a signal conditioning circuit is arranged between the sensor and the A/D converter and comprises 16 signal conditioning and collecting channels, wherein 9 channels are used for collecting acceleration signals of the acceleration sensor, 3 channels are used for collecting pulsating pressure signals of the pressure sensor, and 4 channels are used for collecting strain signals of the strain sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022534420.1U CN213422580U (en) | 2020-11-05 | 2020-11-05 | Miniature impact resistance device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022534420.1U CN213422580U (en) | 2020-11-05 | 2020-11-05 | Miniature impact resistance device |
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| CN213422580U true CN213422580U (en) | 2021-06-11 |
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| CN202022534420.1U Active CN213422580U (en) | 2020-11-05 | 2020-11-05 | Miniature impact resistance device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113701877A (en) * | 2021-08-27 | 2021-11-26 | 中铁建电气化局集团第三工程有限公司 | Vibration monitoring method for overhead line system |
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2020
- 2020-11-05 CN CN202022534420.1U patent/CN213422580U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113701877A (en) * | 2021-08-27 | 2021-11-26 | 中铁建电气化局集团第三工程有限公司 | Vibration monitoring method for overhead line system |
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