CN202710600U - SD card equipped three-dimensional acceleration motion measuring instrument - Google Patents
SD card equipped three-dimensional acceleration motion measuring instrument Download PDFInfo
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- CN202710600U CN202710600U CN 201220419232 CN201220419232U CN202710600U CN 202710600 U CN202710600 U CN 202710600U CN 201220419232 CN201220419232 CN 201220419232 CN 201220419232 U CN201220419232 U CN 201220419232U CN 202710600 U CN202710600 U CN 202710600U
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Abstract
The utility model relates to an SD card equipped three-dimensional acceleration motion measuring instrument. The SD card equipped three-dimensional acceleration motion measuring instrument is composed of an acceleration measuring circuit box and an elastic fixing clasp, wherein a power supply button, a selection button, two display buttons, an SD card storing opening and a liquid crystal screen are arranged on the acceleration measuring circuit box, and a three-dimensional accelerometer, a sound detection circuit and a single-chip microcomputer control circuit are arranged inside the acceleration measuring circuit box. The motion measuring instrument realizes convenient acceleration data acquisition and storage by acquiring, processing and displaying three-dimensional acceleration signals, is reasonable in structure, stable and reliable, can acquire data for a long time, and is suitable for acceleration measurement for athletes and for teaching measurement in courses as mechanics and electronic technology in colleges.
Description
Technical field
The utility model relates to a kind of three-dimensional acceleration motion measuring instrument with the SD card, belongs to the surveying instrument technical field of kinematics, mechanics, electronics.
Background technology
Degree of will speed up sensor application can be used for obtaining the information such as athletic speed and vigor among sports, can athletic reaction capacity and acceleration be measured, to the athletic training effect of being very helpful.
To the mensuration of sportsman's reaction capacity, be by simple assay method to the acousto-optic reaction time mostly, or the sportsman carried out the test of reaction capacity by the computer simulation method for measuring in the past.But these method of testings are subjected to external environment and people's the impact of subjective psychological factor larger, and error is larger, can not accurately reflect objectively the ability of sportsman's nerves reaction at the volley.
This can by the sportsman being heard the measurement of the acceleration of motion after issuing an order, grasp the situation of each athletic nerve and motion response with the three-dimensional acceleration motion measuring instrument of SD card.The utility model has adopted advanced three dimension acceleration sensor, in conjunction with sound detection and single-chip computer control system, not only can on sports ground, directly, accurately measure athletic reaction and acceleration, but also can carry out analysis and synthesis to acceleration, can promote the research of sportsman's acceleration and improve the athletic level of training, the reference frame of science is provided for athletic selection and training.The utility model also is applicable to the fields of measurement of the courses such as mechanics, electronics simultaneously.
Summary of the invention
The utility model is for the deficiency of existing surveying instrument, proposition combines the three-dimensional acceleration motion measuring instrument with the SD card of LCDs, three dimension acceleration sensor and single chip machine controlling circuit, the three-dimensional acceleration motion measuring instrument of SD card is made of acceleration analysis circuit box and flexible fastening clasp, have power knob, selection button, two the Show Buttons, SD cards storage mouth and liquid crystal displays on the acceleration analysis circuit box, have three dimension acceleration sensor, sound detection circuit and single chip machine controlling circuit in the acceleration analysis circuit box.The measuring instrument volume is little, lightweight, can gather for a long time the three-dimensional acceleration data.
The singlechip chip that the single chip machine controlling circuit of measuring instrument adopts is that TI company is 16 MSP430F2274 of portable equipment exploitation, Flash program storage and 1K byte data RAM in the inner integrated 32K chunk of MSP430F2274 single-chip microcomputer.In the 8 path 10 position successive approximation A/D converters, hardware multiplier, 1 tunnel accurate analog comparator, sheet WatchDog Timer, 3 tunnel have hardware catch/16 bit timing devices, 2 road general serial communication interfaces and the sheet of comparison and PWM output function in temperature sensor.Chip adopts the encapsulation of QFP64 paster simultaneously, saves board area.In addition, its clock system is to aim at battery power supply system and specially designed, have its flexibly clock source (outside high speed crystal oscillator, outside low speed crystal oscillator, numerically-controlled oscillator), selectable 4 kinds of low-power consumption modes, can make device reach minimum power consumption.And numerically controlled oscillator (DCO) can make device wake up rapidly from low-power consumption mode, makes processor work in state of activation within the time that is less than 1 μ s.
The three dimension acceleration sensor of this measuring instrument adopts the MMA7260 of Freescale Semiconductor, it is the three-dimensional high sensitivity acceleration transducer of a single-chip, based on the surface micro structure, integrated signal modulate circuit, single pole and low pass wave filter and temperature compensation part, and have 4 kinds of different sensitivity preference patterns.MMA7260 can three of XYZ axially on the variation of high sensitivity measure acceleration.Its adopts 2.2～3.6V single power supply, and working current is less than 500 μ A (sleep pattern only has 3 μ A), can measure 0～350Hz ,-6g～+ the 6g scope in dynamically or static acceleration.
Measuring instrument is by the A/D converter of single-chip microcomputer, and data stored by cooperation SD card and acceleration transducer MMA7260 measures.The measuring instrument whole system is by the 3V powered battery.If the A/D converter sample frequency reaches 1kHz, create the identifiable text document recording acceleration data of Windows operating system in SD storage card inside according to the FAT16 storage format, but the 256M storage card acceleration information of Coutinuous store 12h just then.
This measuring instrument adopts take the LM358 chip as main sound detection circuit, sound detection circuit is not when detecting sound, and its output terminal is high level, when microphone receives the voice signal of some strength, its output terminal becomes low level, and circuit output signal is received single-chip microcomputer.
Sound detection circuit is used for detecting the voice signals such as starting pistol, and is initial as what acceleration transducer was measured.The emphasis of sound detection circuit design is the filter out noise signal, produces a pulse signal when detecting the starting pistol shot, and counter begins counting after the single-chip microcomputer identification.
The flexible fastening clasp adopts sheet metal to make, and ensuring preferably elasticity, and is fixed by screw and circuit box, and the flexible fastening clasp is used for convenient connection sportsman's arm band or waistband.
Description of drawings
Fig. 1 is the three-dimensional acceleration motion measuring instrument with the SD card, wherein 1 be LCDs, the 2nd, the acceleration analysis circuit box, the 3rd, the liquid crystal display button, the 4th, select button, the 5th, lcd power source button, the 6th, SD card storage mouthful.
Fig. 2 is the three-dimensional acceleration motion measuring instrument side with the SD card, wherein 7 are flexible fastening clasps.
Fig. 3 is signal processing circuit.
Fig. 4 is the SD card interface circuit.
Embodiment
In this measuring instrument uses, after three dimension acceleration sensor is received voice signal, beginning paratonic movement person's motion, and a variation of motion is converted to the variation of voltage, again through the conditioning of metering circuit amplification, filtering and transducing signal, A/D analog to digital converter conversions etc. are processed by Single Chip Microcomputer (SCM) system at last and data are stored and shown.The three-dimensional acceleration information obtains with treatment circuit and mainly utilizes single-chip microcomputer, measures and obtains when passage is realized sportsman's three-dimensional acceleration of motion by catching of it.Measuring instrument is rational in infrastructure, and is reliable and stable, and long-time image data is suitable for the measure teaching of the course such as mechanics, electronic technology to athletic acceleration analysis and universities and colleges.
The sensitivity of sound detection circuit can be regulated, and when neighbourhood noise is larger, answers desensitization, when neighbourhood noise is smaller, can improve sensitivity.
In this measuring instrument, use 3 analog input channel collections of A/D unit vertical, the acceleration voltage signal of front and back, 3 directions of side direction.Wherein the acceleration signal of fore-and-aft direction accesses analog input channel A0, the acceleration signal access analog input channel A1 of side direction, and the acceleration signal access analog input channel A2 of vertical direction, untapped analog input channel is connecting analog ground all.Use supply voltage as the reference voltage of A/D conversion.The order of the data-switching collection of 3 directions be side direction, front and back to vertical to, after each Channel-shifted finishes, can trigger A/D and interrupt, the A/D transformation result is preserved in the buffer memory array.Because the TimerA module of MSP430F2274 single-chip microcomputer adopts special count mode, so regularly accurately, do not exist because the time error that counter heavy cartridges initial value produces.
The data RAM district is that the A/D sampling routine has distributed 512 bytes as the data buffer of preserving sampled data in the sheet of single-chip microcomputer 1K byte simultaneously, deposits the operating process of SD card in to cooperate data.In order to finish the communication process of single-chip microcomputer and SD card, general serial communication interface (USCI) cell location that need to single-chip microcomputer is integrated is the SPI mode of operation.
。The SD card that this measuring instrument adopts SanDisk company to produce, the SD card is operated in the SPI pattern, its SPI interface utilizes CS, SCLK, DATA IN, DATA OUT and the MSP430F2274 of SD card to communicate, wherein DATAIN and DATA OUT are the input and output signal lines of data, CS is the chip selection signal line of SD sheet, in whole SPI operating process, CS must keep Low level effective, and SCLK is the clock signal that peripheral control unit provides.
Claims (5)
1. three-dimensional acceleration motion measuring instrument with the SD card, it is characterized in that: the three-dimensional acceleration motion measuring instrument with the SD card is made of acceleration analysis circuit box and flexible fastening clasp, have power knob, selection button, two the Show Buttons, SD cards storage mouth and liquid crystal displays on the acceleration analysis circuit box, have three dimension acceleration sensor, sound detection circuit and single chip machine controlling circuit in the acceleration analysis circuit box.
2. the three-dimensional acceleration motion measuring instrument with the SD card according to claim 1 is characterized in that: its three dimension acceleration sensor employing MMA7260.
3. the three-dimensional acceleration motion measuring instrument with the SD card according to claim 1, it is characterized in that: the singlechip chip that its single chip machine controlling circuit adopts is MSP430F2274.
4. the three-dimensional acceleration motion measuring instrument with the SD card according to claim 1, it is characterized in that: master chip that its sound detection circuit adopts is LM358.
5. the three-dimensional acceleration motion measuring instrument with the SD card according to claim 1 is characterized in that: what its SD card storage was adopted is the SD card of SanDisk company, and the SD card is operated in the SPI pattern.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220419232 CN202710600U (en) | 2012-08-23 | 2012-08-23 | SD card equipped three-dimensional acceleration motion measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220419232 CN202710600U (en) | 2012-08-23 | 2012-08-23 | SD card equipped three-dimensional acceleration motion measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202710600U true CN202710600U (en) | 2013-01-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220419232 Expired - Fee Related CN202710600U (en) | 2012-08-23 | 2012-08-23 | SD card equipped three-dimensional acceleration motion measuring instrument |
Country Status (1)
| Country | Link |
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| CN (1) | CN202710600U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092019A (en) * | 2015-08-17 | 2015-11-25 | 东北大学 | MEMS (Micro-Electro-Mechanical System) sensor and method for testing omni-directional vibration signals |
-
2012
- 2012-08-23 CN CN 201220419232 patent/CN202710600U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092019A (en) * | 2015-08-17 | 2015-11-25 | 东北大学 | MEMS (Micro-Electro-Mechanical System) sensor and method for testing omni-directional vibration signals |
| CN105092019B (en) * | 2015-08-17 | 2017-12-01 | 东北大学 | A kind of MEMS sensor and method available for Omnibearing vibrating signal testing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130130 Termination date: 20130823 |