CN108013879A - A kind of three-dimensional acceleration measuring device and method - Google Patents
A kind of three-dimensional acceleration measuring device and method Download PDFInfo
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- CN108013879A CN108013879A CN201610972985.3A CN201610972985A CN108013879A CN 108013879 A CN108013879 A CN 108013879A CN 201610972985 A CN201610972985 A CN 201610972985A CN 108013879 A CN108013879 A CN 108013879A
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- acceleration
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- acceleration measuring
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2503/00—Evaluating a particular growth phase or type of persons or animals
- A61B2503/10—Athletes
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Abstract
The present invention relates to a kind of three-dimensional acceleration measuring device and method, it is proposed combines a kind of the three-dimensional acceleration measuring device and method of liquid crystal display, three dimension acceleration sensor and single chip machine controlling circuit, its three-dimensional acceleration measurement device is made of acceleration measuring circuit box and flexible fastening retaining ring；After three dimension acceleration sensor receives voice signal, start the movement of sensing sportsman, and the change of movement is converted to the change of voltage, amplify again through measuring circuit, filter and the conditioning of transducing signal, A/D analog-digital converters are changed, and are finally handled by SCM system and data are stored and shown.The present invention passes through the acquisition to three-dimensional acceleration signal, processing and display, realize the collection and storage of convenient acceleration information, measuring device is rational in infrastructure, method is reliable and stable, can long-time gathered data, be suitable for the measure teaching of the course such as the acceleration analysis to movement and the mechanics of each universities and colleges, electronic technology.
Description
Technical field
The present invention relates to a kind of three-dimensional acceleration measuring device and method, belongs to kinematics, mechanics, the measurement skill of electronics
Art field.
Background technology
Among acceleration transducer is applied to sports, it can be used for obtaining the letter such as speed and vigor of sportsman
Breath, can be measured the respond and acceleration of sportsman, the effect of being very helpful of the training to sportsman.
In the past to the measure of sportsman's respond, be mostly by simply to the assay method in acousto-optic reaction time,
The test of respond is either carried out to sportsman by computer simulation method for measuring.But these test methods are by outer
Boundary's environment and the subjective psychological factor of people have a great influence, and error is larger, it is impossible to accurately objectively reflect sportsman during exercise
Nerves reaction ability.
This three-dimensional acceleration measuring device and method, can be by hearing sportsman the survey of the acceleration of motion after issuing an order
Amount, grasps the nerve of each sportsman and the situation of motor reaction.Present invention employs more advanced three-dimensional acceleration sensing
Device, with reference to sound detection and single-chip computer control system, not only can directly, accurately measure the reaction of sportsman on sports ground
And acceleration, but also analysis and synthesis can be carried out to acceleration, the research of sportsman's acceleration can be promoted and improve fortune
The level of training of mobilization, the reference frame of science is provided for the selection and training of sportsman.At the same time it is suitable for mechanics,
The fields of measurement of the courses such as electronics.
The content of the invention
The present invention is directed to the deficiency of existing measuring device device, and proposition combines liquid crystal display, three dimension acceleration sensor
With a kind of the three-dimensional acceleration measuring device and method of single chip machine controlling circuit, the three-dimensional acceleration movement measuring device of SD card by
Acceleration measuring circuit box and flexible fastening retaining ring are formed, and have power knob, select button, two on acceleration measuring circuit box
A the Show Button, SD card storage mouth and liquid crystal display, acceleration measuring circuit box is interior to have three dimension acceleration sensor, sound detection
Circuit and single chip machine controlling circuit.Measuring device is small, light-weight, can gather three-dimensional acceleration data for a long time.
Singlechip chip is that TI companies are 16 that portable equipment is developed used by the single chip machine controlling circuit of measuring device
Position MSP430F2274, MSP430F2274 microcontrollers are internally integrated Flash program memory and 1K byte datas in 32K chunks
RAM.8 10, passage successive approximation A/D converters, hardware multiplier, the accurate analog comparator in 1 tunnel, house dog timing in piece
There is hardware to capture/compare and temperature in 16 bit timing devices of PWM output functions, 2 road general serial communication interfaces and piece for device, 3 tunnels
Spend sensor.Chip is encapsulated using QFP64 patches at the same time, saves board area.In addition, its clock system is to aim at battery
Electric power system and it is specially designed, having its flexible clock source, (exterior high speed crystal oscillator, exterior low speed crystal oscillator, digital control shake
Swing device), selectable 4 kinds of low-power consumption modes, device can be made to reach minimum power consumption.Moreover, numerically controlled vibration
Device (DCO) can be such that device is waken up rapidly from low-power consumption mode, processor is worked in state of activation within the time less than 1 μ s.
The three dimension acceleration sensor of this acceleration measurement device uses the MMA7260 of Freescale Semiconductor, it
It is a single-chip three-dimensional high sensitivity acceleration transducer, based on surface micro structure, integrated signal modulate circuit, monopole
Point low-pass filter and temperature-compensating part, and there are 4 kinds of different sensitivity selection modes.MMA7260 can be tri- in XYZ
With the change of high sensitivity measure acceleration in axial direction.It is powered using 2.2~3.6V single supplies, and operating current is less than
Dynamic or static acceleration in the range of 500 μ A (sleep pattern only has 3 μ A), measurable 0~350Hz, -6g~+6g.
Measuring device coordinates SD card storage data and acceleration transducer MMA7260 by the A/D converter of microcontroller
Measure.Measuring device whole system is by 3V battery powereds.If A/D converter sample frequency reaches 1kHz, stored in SD
Card is internal to create the identifiable text document recording acceleration data of Windows operating system according to FAT16 storage formats, then
256M storage cards can Coutinuous store 12h acceleration information.
This acceleration measurement device uses the sound detection circuit based on LM358 chips, and sound detection circuit is not having
When detecting sound, its output terminal is high level, and when microphone receives the voice signal of some strength, its output terminal is changed into
Low level, circuit output signal are connected to microcontroller.
Sound detection circuit is used for detecting the voice signals such as starting pistol, as the starting measured acceleration transducer.Sound
The emphasis of tone detection circuit design is to filter out noise signal, and a pulse signal, monolithic are produced when detecting starting pistol shot
Counter starts counting up after machine identification.
Flexible fastening retaining ring is made of sheet metal, to ensure having preferable elasticity, and is fixed by screw and circuit box, bullet
Property fix retaining ring and be used to convenient connect sportsman's arm band or waistband.
Brief description of the drawings
Fig. 1 is three-dimensional acceleration measuring device, and therein 1 is liquid crystal display, and 2 be acceleration measuring circuit box, and 3 be liquid
Brilliant the Show Button, 4 be select button, and 5 be LCD power source button, and 6 be SD card storage mouth.
Fig. 2 is three-dimensional acceleration measuring device and method side, and therein 7 be flexible fastening retaining ring.
Fig. 3 is signal processing circuit.
Fig. 4 is SD card interface circuit.
Embodiment
In this acceleration measurement device in use, after three dimension acceleration sensor receives voice signal, start sensing movement
The movement of member, and the change of movement is converted to the change of voltage, then amplify through measuring circuit, filter and the tune of transducing signal
Reason, A/D analog-digital converters conversion etc., is finally handled by SCM system and data is stored and shown.Three-dimensional adds
Velocity information obtains and process circuit mainly utilizes microcontroller, is realized by its capture passage and sportsman's three-dimensional is moved
Measure and obtain while acceleration.Measuring device is rational in infrastructure, reliable and stable, can long-time gathered data, be suitable for pair
The measure teaching of the course such as the acceleration analysis of movement and the mechanics of universities and colleges, electronic technology.
The sensitivity of sound detection circuit can be adjusted, and when ambient noise is bigger, should reduce sensitivity, work as ring
When border noise is smaller, sensitivity can be improved.
In this acceleration measurement device, vertical, front and rear, lateral 3 are gathered using 3 analog input channels of A/D units
The acceleration voltage signal in a direction.Acceleration signal access analog input channel A0 wherein in the front-back direction, lateral acceleration
Spend signal access analog input channel A1, the acceleration signal access analog input channel A2 of vertical direction, untapped simulation
Input channel all connects simulation ground.The reference voltage changed using supply voltage as A/D.The data conversion collection in 3 directions
Order for it is lateral, front and rear to vertically to, after each passage conversion end, can trigger A/D interruption, A/D transformation results are protected
In deposit caching array.Since the TimerA modules of MSP430F2274 microcontrollers use special count mode, so timing is accurate
Really, there is no the time error that initial value generation is reloaded due to counter.
Data RAM areas are assigned with 512 bytes as preservation and adopt for A/D sampling routines in the piece of microcontroller 1K bytes at the same time
The data buffer zone of sample data, to coordinate the operating process of data deposit SD card.In order to complete the communication of microcontroller and SD card
Journey by common serial communication interface (USCI) unit that microcontroller integrates, it is necessary to be configured to SPI operating modes.
This acceleration measurement device uses the SD card of SanDisk Corporation production, and SD card is operated in SPI mode, its SPI interface
Communicated using CS, SCLK, DATAIN, DATA OUT of SD card with MSP430F2274, wherein DATA IN and DATA OUT
It is the input and output signal line of data, CS is the chip selection signal line of SD pieces, and in whole SPI operating process, CS must be kept
Low level is effective, and SCLK is the clock signal that peripheral control unit provides.
Claims (5)
1. a kind of three-dimensional acceleration measuring device and method, it is characterized in that：Combine liquid crystal display, three dimension acceleration sensor
And single chip machine controlling circuit, its measuring device are made of acceleration measuring circuit box and flexible fastening retaining ring；Three-dimensional acceleration passes
After sensor receives voice signal, start to sense the movement of sportsman, and the change of movement is converted to the change of voltage, then through surveying
Measure circuit amplification, filtering and the conditioning of transducing signal, A/D analog-digital converters conversion, finally by SCM system processing and logarithm
According to being stored and shown；There are power knob, select button, two the Show Buttons, SD cards on its acceleration measuring circuit box
Mouth and liquid crystal display are stored, there is three dimension acceleration sensor, sound detection circuit and microcontroller control in acceleration measuring circuit box
Circuit processed.
2. a kind of three-dimensional acceleration measuring device according to claim 1 and method, it is characterized in that：Its three-dimensional acceleration passes
Sensor uses MMA7260.
3. a kind of three-dimensional acceleration measuring device according to claim 1 and method, it is characterized in that：Its microcontroller control electricity
Singlechip chip is MSP430F2274 used by road.
4. a kind of three-dimensional acceleration measuring device according to claim 1 and method, it is characterized in that：Its sound detection circuit
Used master chip is LM358.
5. a kind of three-dimensional acceleration measuring device according to claim 1 and method, it is characterized in that：The storage of its SD card is adopted
It is the SD card of SanDisk Corporation, SD card is operated in SPI mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610972985.3A CN108013879A (en) | 2016-11-04 | 2016-11-04 | A kind of three-dimensional acceleration measuring device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610972985.3A CN108013879A (en) | 2016-11-04 | 2016-11-04 | A kind of three-dimensional acceleration measuring device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108013879A true CN108013879A (en) | 2018-05-11 |
Family
ID=62083618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610972985.3A Pending CN108013879A (en) | 2016-11-04 | 2016-11-04 | A kind of three-dimensional acceleration measuring device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108013879A (en) |
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2016
- 2016-11-04 CN CN201610972985.3A patent/CN108013879A/en active Pending
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180511 |
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| WD01 | Invention patent application deemed withdrawn after publication |