CN109493699A - Wireless WIFI auto-ultrasonic Doppler effect experiment instrument - Google Patents
Wireless WIFI auto-ultrasonic Doppler effect experiment instrument Download PDFInfo
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- CN109493699A CN109493699A CN201811472044.9A CN201811472044A CN109493699A CN 109493699 A CN109493699 A CN 109493699A CN 201811472044 A CN201811472044 A CN 201811472044A CN 109493699 A CN109493699 A CN 109493699A
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- receiving end
- transmitting terminal
- trolley
- guide rail
- module
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/14—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for acoustics
Abstract
Wireless WIFI auto-ultrasonic Doppler effect experiment instrument disclosed by the invention, it is characterised in that it includes supersonic generator, transmitting terminal energy converter, receiving end energy converter, transmitting terminal trolley, receiving end trolley, transmitting terminal guide rail, receiving end guide rail, guide rail connection sheet, movement block, photosignal module, WiFi module；Using wireless control, avoids electric wire connection complicated, measurement data can be shared under local area network, enriches teaching means.It is more equipped with motor and correction rate device, moving of car speed can be actively set, trolley is made to move with uniform velocity according to the velocity amplitude of setting.To improve frequency measurement accuracy by algorithm.Meanwhile sound source and receiving end can move simultaneously, can carry out various ways measurement.
Description
Technical field
The present invention relates to wireless WIFI auto-ultrasonic Doppler effect experiment instruments.
Background technique
When relative motion occurs for wave source, medium and recipient, the frequency of wave can change, and how general this phenomenon be known as
Strangle effect.Doppler effect is an important knowledge point in College Physics mechanical oscillation chapters and sections, and main contents are object radiation
Wavelength generates variation because of the relative motion of wave source and observer.Before the wave source of movement, wave is compressed, wavelength become compared with
Short, frequency becomes higher (blue shift blue shift)；When behind the wave source of movement, opposite effect can be generated.Wavelength becomes
Longer, frequency becomes lower (red shift red shift)；The speed of wave source is higher, and generated effect is bigger.It is red (indigo plant) according to wave
The degree of shifting, can calculate wave source follows the speed of observed direction movement.In order to make university student deepen to manage to Doppler effect
Solution, it is necessary to develop the relevant experimental facilities of Doppler effect.
Currently, having existed a few class Doppler effect experiment instruments in the market.Basic scheme are as follows:
(1) trolley that fixed ultrasonic signal transmitting terminal is set on guide rail and can be moved on guide rail；
(2) ultrasonic probe, ultrasonic receiver, and reception device connection oscillograph or frequency measuring equipment are placed on trolley；
(3) it allows receiving end trolley to move in some way, measures the frequency received；
(4) Doppler effect is verified by frequency displacement.
That designs the Doppler effect experiment instrument of the above-mentioned type is critical that the trolley for receiving signal can be transported on guide rail
It is dynamic.Different instruments uses different moving of car schemes.There is instrument to place counterweight below guide rail, is pulled by counterweight small
Vehicle movement.This scheme can not make trolley uniform motion, thus can only measure signal frequency and movement speed simultaneously in a flash,
Measurement accuracy is difficult to control.For this disadvantage, there is instrument to use air track, to guarantee trolley uniform motion.The party
Structure is complicated for case, needs additionally to connect gas source, while air-flow can generate interference to measurement acoustical signal.There are also instruments by motor and
Synchronous belt controls movement velocity of the trolley on guide rail, makes trolley uniform motion.
By these improvement, there is also following defects for existing equipment:
First, the frequency displacement in Doppler effect is related with the relative motion of transmitting terminal and receiving end, exists and moves toward one another, away from fortune
Move, pursue and attack movement etc. multi-motion modes, existing instrument secure wave source, wave source can not move, thus a variety of sides can not be unfolded
The measurement of formula.
Second, when receiving end is mobile, frequency reception is needed to a distance it is possible that unstable situation
Frequency in range is acquired in real time, improves measurement accuracy by removal exceptional value, existing equipment can not also accomplish this
Point.
Third, existing equipment need to manually set and data record by cumbersome in an experiment, can not pass through terminal control
System, is performed fully automatic measurement and data processing, thus can not be conveniently used for teaching demonstration.
4th, frequency data cannot pass through network Real-Time Sharing, limit to teaching pattern.
Summary of the invention
In view of the above-mentioned problems, the present invention provides wireless WIFI auto-ultrasonic Doppler effect experiment instrument, using wireless controlled
System avoids electric wire connection complicated, measurement data can be shared under local area network, enriches teaching means.More be equipped with motor and
Correction rate device can actively be arranged moving of car speed, trolley is made to move with uniform velocity according to the velocity amplitude of setting.To logical
It crosses algorithm and improves frequency measurement accuracy.Meanwhile sound source and receiving end can move simultaneously, can carry out various ways measurement.
Specific technical solution is as follows:
Wireless WIFI auto-ultrasonic Doppler effect experiment instrument, which is characterized in that including supersonic generator, transmitting terminal transducing
Device, receiving end energy converter, transmitting terminal trolley, receiving end trolley, transmitting terminal guide rail, receiving end guide rail, guide rail connection sheet, movement gear
Block, photosignal module, WiFi module；
Supersonic generator, for alternating current to be converted to the corresponding high-frequency alternating current of energy converter to drive energy converter to work；
Transmitting terminal energy converter for the electrical power of input to be converted into ultrasonic wave, and emits ultrasonic signal；
Receiving end energy converter is used for received ultrasonic signal, connects supersonic generator by spring electric wire；
Transmitting terminal trolley drives transmitting terminal energy converter and transmitting for installing transmitting terminal energy converter and transmitting terminal photoelectric door
End photoelectric door is moved；Transmitting terminal car interior is provided with direct current generator, motor driver, motor control chip, speed school
Positive module, power supply；Power supply is direct current generator power supply, direct current generator transmitting terminal moving of car；Motor control chip and motor driven
Device electrical connection, motor driver are electrically connected with direct current generator, and motor control chip controls direct current by pwm pulse width modulated
Machine revolving speed, for controlling the movement velocity of transmitting terminal trolley；Velocity correction module, it is concentric with DC motor shaft by shaft coupling
Connection, velocity correction module is electrically connected with motor control chip, for monitoring the actual speed of motor；
Transmitting terminal car interior is provided with transmitting terminal main control chip, is used for motor control chip, and by transmitting terminal photoelectric door and
WIFI module receives extraneous control signal, and uploads data by WIFI wireless module；Transmitting terminal main control chip and transmitting
Hold the receiving end photoelectric door electrical connection outside the motor control chip, WiFi module and receiving end trolley of car interior；
Receiving end trolley drives receiving end energy converter and reception for installing receiving end energy converter and receiving end photoelectric door
End photoelectric door is moved；Receiving end trolley direct current generator, motor driver, motor control chip, velocity correction module, power supply
And gear structure is identical as transmitting terminal trolley；
Receiving end car interior is equipped with frequency acquisition module, and the frequency acquisition module includes signal amplification module, analog-to-digital conversion
Module, storage module and transducer signal acquisition chip；Signal amplifies mould module and receiving end energy converter, analog-to-digital conversion module
Electrical connection, analog-to-digital conversion module are electrically connected with memory module, and memory module is electrically connected with transducer signal acquisition chip；Receiving end
Acoustic pressure is converted into amplifying after electric signal by signal amplification module by energy converter, is converted after transmission by analog-to-digital conversion module
At in digital quantity deposit memory module, transducer signal acquisition chip reads data from memory module；
Receiving end car interior is provided with receiving end main control chip, for motor control chip and signal acquisition chip simultaneously, and
Extraneous control signal is received by receiving end photoelectric door and WIFI module, and data are uploaded by WIFI wireless module；It connects
It the motor control chip of receiving end main control chip and receiving end car interior, transducer signal acquisition chip, WiFi module and connects
Receiving end photoelectric door electrical connection outside receiving end trolley；
Transmitting terminal guide rail makes to move in a straight line on transmitting terminal trolley along guide rail for carrying transmitting terminal trolley；With receiving end guide rail
It is oppositely arranged；
Receiving end guide rail makes to move in a straight line on transmitting terminal trolley along guide rail for carrying transmitting terminal trolley；With transmitting terminal guide rail
It is oppositely arranged；
Guide rail connection sheet, symmetrical two panels, for connecting receiving end guide rail and transmitting terminal guide rail；
Block is moved, the both ends of transmitting terminal guide rail Yu receiving end guide rail are set to, for preventing transmitting terminal trolley and receiving end small
Vehicle movement is driven out to transmitting terminal guide rail and receiving end guide rail；
Photosignal module, including transmitting terminal photoelectric door, receiving end photoelectric door and photoelectric door baffle plate frame；
Transmitting terminal photoelectric door, is mounted on front position on transmitting terminal trolley, and cooperation photoelectric door baffle plate frame determines that transmitting terminal trolley is transported
Dynamic position；
Receiving end photoelectric door, is mounted on front position on the trolley of receiving end, and cooperation photoelectric door baffle plate frame determines that receiving end trolley is transported
Dynamic position；
Photoelectric door baffle plate frame, quantity be it is multiple, be mounted on the side of transmitting terminal guide rail and receiving end guide rail, cooperation photoelectric door is true
Determine transmitting terminal trolley and receiving end moving of car position；
WiFi module is used for transmission receiving end trolley and transmitting terminal trolley main control chip data；Quantity is two, and a fixation is set
It is placed in transmitting terminal trolley to be electrically connected with transmitting terminal main control chip, another is fixedly installed on receiving end car interior and receiving end master
Control chip electrical connection.
Further, guide rail connection sheet quantity is two, is L-type, including rectangular apex angle face and arched top edged surface, rectangular
There is screw hole on apex angle face and arched top edged surface, by the side in the rectangular apex angle face of connection sheet and transmitting terminal guide rail or receiving end guide rail
Face is close to, and passes through the corresponding screw hole of connection sheet and rail-sides face with screw, the rectangular apex angle face of connection sheet is led with transmitting terminal
The side of rail or receiving end guide rail is fixedly connected, and the arched top edged surface of connection sheet and the arched top edged surface of another connection sheet are logical
It crosses screw and nut is fixed together.
Further, transmitting terminal guide rail and receiving end guide rail size, shape are consistent, and rail crown two sides are provided with track
The wheel of rib, transmitting terminal trolley and receiving end trolley is set on track rib, and track rib can prevent wheel movement inclined
Difference guarantees that wheel is moved in guide rail interior, does not roll.
Further, movement block is in N-shaped structure, and two sides of the bottom setting has screw hole again, cooperates screw by screw hole
So that movement block is fixed on transmitting terminal guide rail and receiving end guide rail, moves side on block and be provided with spongy layer, for making
Buffering when being hit for trolley.
Compared with prior art, beneficial effects of the present invention are as follows:
1, two trolleies can also can be moved toward one another simultaneously or with another static movement away from fortune on guide rail
It is dynamic.Transmitting terminal trolley and receiving end trolley can the speed uniform motion independent according to setting, a variety of sides can be carried out
The experimental verification of formula.Since trolley can remain a constant speed movement in a distance, the error of frequency measurement is reduced.
2, during verifying Doppler effect, in order to make trolley linear motion use the structure of track extra bus wheel, and
Small interior provided with high precision velocity correction module, guarantee energy converter trolley uniform motion.In actual motion, because of power
Loss, the reasons such as frictional dissipation, motor control chip control motor by PWM, and theory setting can not be fully achieved in trolley
Speed.Signal is back to motor control chip, motor by the actual speed that motor can be monitored in real time by velocity correction module
Control chip is compared actual speed and theoretical rotational speed, adjusts motor control power in real time by pid algorithm, guarantees small
Vehicle is stablized in theoretical setting speed.
3, in verifying Doppler effect experiment instrument, using the structure of two-part track, transmitting terminal and receiving end trolley are all
It independent can be moved on respective guide rail.In experiment, transmitting terminal guide rail is connected with mobile terminal guide rail by connection sheet
Together.It is detachably, convenient for collecting when not testing.
4, by the measurement of the how general effect of WIFI wireless control ultrasonic wave, frequency data can be shared under local area network.And lead to
Terminal PC automatic data processing is crossed, obtains experimental result, and since wireless control makes whole device of the present invention, signal wire quantity
It is few, it is conveniently used for teaching demonstration.
5, it during measuring Doppler effect, by acquiring a large amount of frequency data in real time automatically, using Lay spy's rule, goes
Except unstable data, reduce the error of frequency measurement.
6, acoustic pressure is generally several mv after energy converter is converted into electric signal, and obvious with range attenuation, because
And need to be converted into after electric signal amplifying by signal amplification module by acoustic pressure by receiving end energy converter, by mould after transmission
Number conversion module is converted into digital quantity deposit memory module, and transducer signal acquisition chip reads data from memory module,
Therefore data can be guaranteed finally by accuracy.
Detailed description of the invention
Fig. 1 is schematic diagram of the present invention.
Fig. 2 is pedestal connection sheet schematic diagram.
Fig. 3 is movement block schematic diagram.
Fig. 4 is receiving end/transmitting terminal guide rail and wheel position schematic diagram.
Fig. 5 is photoelectric door and photoelectric door baffle plate frame schematic diagram.
Fig. 6 is receiving end/transmitting terminal trolley DC MOTOR CONTROL schematic diagram.
Fig. 7 is frequency acquisition module schematic diagram.
Fig. 8 is receiving end main control chip control schematic diagram.
Fig. 9 is transmitting terminal main control chip control schematic diagram.
Specific embodiment
Clear to be more clear technical solution of the present invention, the present invention is described further with reference to the accompanying drawing,
The technical characteristic of any pair of technical solution of the present invention carries out the scheme that equivalencing is obtained with conventional reasoning and each falls within guarantor of the present invention
Protect range.
Description of symbols
Transmitting terminal energy converter (1), receiving end energy converter (2), transmitting terminal trolley (3), receiving end trolley (4), transmitting terminal photoelectric door
(5), receiving end photoelectric door (6), No. 1 photoelectricity door guard plate and baffle plate frame (7-1), No. 2 photoelectricity door guard plates and baffle plate frame (7-2), No. 3
Photoelectricity door guard plate and baffle plate frame (7-3), No. 4 photoelectricity door guard plates and baffle plate frame (7-4) move block (8-1), move block (8-
2) block (8-3), is moved, is moved block (8-4), spring wire (9), guide rail connection sheet (10), receiving end guide rail (11-1), transmitting
It holds guide rail (11-2), supersonic generator (12)
The unmentioned mode and fixed setting mode of being fixedly connected in the present embodiment is gluing, and bolt and nut connects, screw
The well-known technique that the those skilled in the art such as connection are understood thoroughly.
Transmitting terminal photoelectric door, receiving end photoelectric door employed in the embodiment of the present invention and photoelectric door baffle plate frame are adopted as
F type photoelectric door and photoelectricity baffle plate frame.
For the direct current generator used in the embodiment of the present invention for general high revolving speed direct current generator in the market, voltage uses 12V.
The motor control chip used is Freescale MC9S12 series monolithic；Motor driver is STMicw Electronics (ST) group
L298N driver；Velocity correction module is the ZVH-4A-50BM-E5-26E photoelectric coding of Changchun Yuheng Optics Co., Ltd.
Device, the encoder installation method be with shaft coupling with DC motor shaft is concentric connect, with for testing the speed.It is adopted in the present embodiment
Receiving end trolley and transmitting terminal trolley are purchased from the Kai Zhi electronics official shop of Taobao, trolley model UNO R3
N20。
The signal amplification module used in the embodiment of the present invention is AD603 amplifier；Analog-to-digital conversion module is ADS831 high
Fast modulus conversion chip；Storage module uses FIFO memory IDT7205；Transducer signal acquisition chip STM32 series monolithic
Machine；After analog-to-digital conversion, since ADS831 sample frequency is much larger than ultrasonic signal frequency, in a ultrasonic wave period
It is interior, enough acoustic pressure datas can be collected, signal frequency can be obtained by judging the number of signal rising edge in certain time
Rate.This requires single-chip microcontrollers certain numerical operation ability, therefore transducer signal acquisition chip is required using STM32 series
Single-chip microcontroller.
The receiving end used in the embodiment of the present invention/transmitting terminal main control chip, should for AVR Mega2560 series monolithic
The single-chip microcontroller of series can be used, which has 4 road serial ports, and have mature program library, and programming is simple.
The WIFI module used in the embodiment of the present invention is the ESP8266 module of serial ports type.
As shown in Figure 1, this instrument includes: transmitting terminal energy converter (1), receiving end energy converter (2), transmitting terminal trolley (3) is connect
Receiving end trolley (4), transmitting terminal photoelectric door (5), receiving end photoelectric door (6), No. 1 photoelectric door baffle plate frame (7-1), No. 2 photoelectricity door shields
Grillage (7-2), No. 3 photoelectric door baffle plate frames (7-3), No. 4 photoelectric door baffle plate frames (7-4) move block (8-1), move block (8-
2) block (8-3), is moved, is moved block (8-4), spring wire (9), guide rail connection sheet (10), receiving end guide rail (11-1), transmitting
It holds guide rail (11-2), supersonic generator (12).
Transmitting terminal trolley (3) moves in a straight line on transmitting terminal guide rail (11-2), is fixedly connected at the top of transmitting terminal trolley (3)
Transmitting terminal energy converter (1), transmitting terminal trolley (3) top side are fixedly connected transmitting terminal photoelectric door (5), transmitting terminal guide rail (11-2)
Movement block (8-1) is fixedly installed in both ends respectively, moves block (8-2)；No. 1 photoelectricity is fixedly installed on transmitting terminal guide rail (11-2)
Door guard plate and baffle plate frame (7-1), No. 2 photoelectricity door guard plates and baffle plate frame (7-2).
Receiving end trolley (4) moves in a straight line on receiving end guide rail (11-1), is fixedly connected at the top of receiving end trolley (4)
Receiving end energy converter (2), receiving end trolley (4) top side are fixedly connected receiving end photoelectric door (6), receiving end guide rail (11-1)
Movement block (8-3) is fixedly installed in both ends respectively, moves block (8-4)；No. 3 photoelectricity are fixedly installed on receiving end guide rail (11-1)
Door guard plate and baffle plate frame (7-3), No. 4 photoelectricity door guard plates and baffle plate frame (7-4).
Trolley has an acceleration and speed unstable stage when just starting starting, therefore devises on guide rail
The buffer area of moving of car.Block and adjacent photoelectric door constitute movement buffer area, then form fortune between two photoelectric doors
Dynamic measurement zone.After trolley is by movement buffer area, reach uniform motion, into motion measurement area, then passes through receiving end transducing
The signal of device (1) carries out frequency measurement.As shown in Figure 1, movement block (8-1) and No. 1 photoelectric door baffle plate frame (7-1) and movement
Block (8-2) and No. 2 photoelectric door baffle plate frames (7-2) constitute two movement buffer areas of transmitting terminal trolley (3), No. 1 photoelectric door
Baffle plate frame (7-1) and No. 2 photoelectric door baffle plate frames (7-2) constitute the motion measurement area of transmitting terminal trolley (3).Move block (8-
3) and No. 3 photoelectric door baffle plate frames (7-3) and movement block (8-4) and No. 4 photoelectric door baffle plate frames (7-4) to constitute receiving end small
Two movement buffer areas of vehicle (4), No. 3 photoelectric door baffle plate frames (7-3) and No. 4 photoelectric door baffle plate frames (7-4) constitute receiving end
The motion measurement area of trolley (4).
Two trolleies can also be moved toward one another or be deviated from simultaneously with another static movement on guide rail
Movement.Movement block is provided at the endpoint of each guide rail, it, can stop motion after trolley deceleration bumps against on block.
Spring wire (9) connects receiving end energy converter (2) and supersonic generator (12).
Transmitting terminal trolley (3) and receiving end trolley (4) have respective moving region A and B, and region A and B are right in structure
Claim design.
As shown in Fig. 2, guide rail connection sheet (10) quantity is two, it is L-type, including rectangular apex angle face (14) and arched top
Edged surface (15) has screw hole (13) on rectangular apex angle face (14) and arched top edged surface (15), by the rectangular apex angle face of connection sheet
(14) it is close to the side of transmitting terminal guide rail (11-2) or receiving end guide rail (11-1), passes through connection sheet and guide rail side with screw
Company is fixed with hair transmitting terminal guide rail (11-2) or receiving end guide rail (11-1) in the rectangular apex angle face of connection sheet by corresponding screw hole
It connects, the arched top edged surface (15) of connection sheet and the arched top edged surface of another connection sheet are solid by screw (16) and nut (17)
Surely it links together.
It as shown in Fig. 3, moves block (8-1), moves block (8-2), move block (8-3), movement block (8-4)
Size, shape are consistent, are in N-shaped structure, and two sides of the bottom setting has screw hole (19) again, cooperate screw to transport by screw hole
Dynamic block is fixed on transmitting terminal guide rail (11-2) and receiving end guide rail (11-1), is moved side on block and is provided with spongy layer
(18), buffering when for being hit as trolley.
As shown in figure 4, transmitting terminal guide rail (11-2) and receiving end guide rail (11-1) size, shape are consistent, rail crown
Two sides are provided with track rib (21), and the wheel (20) of transmitting terminal trolley and receiving end trolley is set on track rib (21),
Track rib can prevent wheel movement deviation, guarantee that wheel is moved in guide rail interior, do not roll.
As shown in figure 5, the present invention uses F type photoelectric door and photoelectricity baffle plate frame, photoelectric door (5)/(6) are mounted on transmitting terminal is small
On vehicle (3) and receiving end trolley (4), photoelectric door baffle plate frame (7-1)/(7-2)/(7-3)/(7-4) is mounted on receiving end guide rail
The side of (11-1) and transmitting terminal guide rail (11-2).
As shown in fig. 6, receiving end/transmitting terminal trolley DC MOTOR CONTROL is mainly by motor control chip (24), motor driven
Device (25), direct current generator (26) and velocity correction module (27) are constituted.Chip (24) controls motor speed by PWM mode,
To control moving of car speed.However, because of power loss, the reasons such as frictional dissipation are small by PWM in actual motion
The speed of theory setting can not be fully achieved in vehicle.The actual speed of motor can be monitored in real time in velocity correction module (27), will
Signal is back to chip (24), and chip (24) is compared actual speed and theoretical rotational speed, is adjusted in real time by pid algorithm
Motor control power guarantees that trolley is stablized in theoretical setting speed.
As shown in fig. 7, frequency acquisition module sound includes signal amplification module (30), analog-to-digital conversion module (29), storage mould
Block (28) and transducer signal acquisition chip (31)；Acoustic pressure is generally several mv after energy converter is converted into electric signal, and
And it is obvious with range attenuation, thus need to amplify by signal amplification module (30).Amplified signal need by
Analog-to-digital conversion module (29) becomes digital quantity deposit memory module (28), and then chip (31) reads data from memory module.
As shown in figure 8, receiving end main control chip (32) is used for while controlling motor chip (24) and signal acquisition chip
(31), extraneous control signal and by photoelectric door and WIFI module is received, and data are uploaded by WIFI wireless module.It connects
Receiving end main control chip (32) connects a WIFI module (33), and WIFI module (33) is responsible for communicating with terminal.In addition, receiving end master
Controlling chip (32) will also carry out with photoelectric door (34), transducer signal acquisition chip (31) and motor control chip (24) connection
The transmission of data and control command.Receiving end main control chip (32) is fixedly installed in receiving end trolley (3).
As shown in figure 9, transmitting terminal main control chip (35) is used for for receiving signal and control.Transmitting terminal main control chip (35)
A WIFI module (36) is connected, is responsible for communicating with terminal.Transmitting terminal main control chip (35) will also be with photoelectric door (37) and motor
Chip (24) connection is controlled, the transmission of data and control command is carried out.Transmitting terminal main control chip (35) is fixedly installed on transmitting terminal
In trolley (4).
Below according to different experiments requirement, experiment flow three times is carried out:
Experimental work process 1
When transmitting terminal trolley and receiving end trolley all move, detailed process is as follows:
1, terminal (computer or mobile phone) sends control command to receiving end main control chip (32) and transmitting terminal by WIFI signal
Main control chip (35).It include the direction of motion of trolley, the information such as movement velocity in order.
2, after receiving end main control chip (32) and transmitting terminal main control chip (35) receive order, by serial ports, starting is sent
Order and speed control information give motor control chip (24).The serial ports for opening simultaneously respectively connection photoelectric door interrupts, and waits light
Electric switch signal.
3, after being connected to start command, motor control chip (24) according to Row control motor shown in Fig. 5, make transmitting terminal and
Receiving end energy converter is mobile with certain speed.
4, the photoelectric door of transmitting terminal trolley (3) is after No. 1 photoelectric door baffle plate frame (7-1), transmitting terminal main control chip (35)
Photosignal is received, the receiving end main control chip (32) that WIFI module sends a signal to receiving end trolley is then passed through.It receives
Hold the photoelectric door on trolley (3) after No. 3 photoelectric door baffle plate frames (7-3), receiving end main control chip (32) can be connect by serial ports
Receive photosignal.
5, when receiving end main control chip (32), confirmation has received serial ports photoelectricity gate signal and receiving end main control chip (32)
After the signal sent by WIFI, start timer interruption, setting occurs once to interrupt every t (ms) time.
6, start command is sent by serial ports in interrupt routine give transducer signal acquisition chip (31).It has sent and has opened
After dynamic order, receiving end main control chip (32) is opened corresponding serial ports and is interrupted, and waits rs 232 serial interface signal.
7, transducer signal acquisition chip (31) starts to acquire the voltage signal of energy converter according to process shown in Fig. 6.Acquisition
A length of t (ms) when signal.After acquisition, acquisition function is closed.After transducer signal acquisition chip (31) obtains acquisition data,
It calculates analysis and obtains frequency data, be sent to serial ports.
8, receiving end main control chip (32) obtains frequency data, in the serial ports of shutdown signal acquisition by interrupting control
It is disconnected.Then data are sent to terminal by WIFI module (18).
9, receiving end main control chip (32) waits timer interruption arrival next time, then returns to step 5, starting is next time
Data acquisition.
10, when transmitting terminal trolley (4) photoelectric door is after No. 2 photoelectric door baffle plate frames (7-2), transmitting terminal main control chip (35) can be sent out
It send to cease and desist order and give motor control chip (24), motor stop motion, while transmitting terminal main control chip (35) can be sent out by WIFI
The number of delivering letters gives main control chip (32).Photoelectric door on receiving end trolley (3) is after No. 4 photoelectric door baffle plate frames (7-4), receiving end
Main control chip (32) can receive photosignal by serial ports.As long as receiving end main control chip (32) receives transmitting terminal master control core
Piece (35) or photoelectric door (34), any one signal in two, cease and desist order to motor control chip (24) with regard to sending and
Transducer signal acquisition chip (31), after being connected to order, motor stalls, while transducer signal acquisition chip stops data
Acquisition.Receiving end main control chip (32) sends end signal to terminal by WIFI.
11, after terminal receives end signal, data is analyzed and are handled.In signal frequency analysis, it is averaging
Value, and pass through Lay spy's criterion of 3 times of standard deviations, bad value is removed, guarantees the accurate of frequency measurement.
Experimental work process 2
When transmitting terminal trolley is static, when the moving of car of receiving end, detailed process is as follows:
1, terminal (computer or mobile phone) sends control command to receiving end main control chip (32) and transmitting terminal by WIFI signal
Main control chip (35).It include the direction of motion of trolley, the information such as movement velocity in order.
2, after receiving end main control chip (32) receives order, by serial ports, send start command and speed control information to
Motor control chip (24).The serial ports for opening simultaneously connection photoelectric door interrupts, and waits photoelectricity gate signal.
3, after being connected to start command, motor control chip (24) according to Row control motor shown in Fig. 5, make transmitting terminal and
Receiving end energy converter is mobile with certain speed.
4, trolley (3) photoelectric door in receiving end is after No. 3 photoelectric door baffle plate frames (7-3), receiving end main control chip (32) meeting
Photosignal is received by serial ports.
5, after receiving end main control chip (32) confirmation has received serial ports photoelectric door signal, start in timer
Disconnected, setting occurs once to interrupt every t (ms) time.
6, start command is sent by serial ports in interrupt routine give transducer signal acquisition chip (31).Starting is sent
After order, receiving end main control chip (32) is opened corresponding serial ports and is interrupted, and waits rs 232 serial interface signal.
7, transducer signal acquisition chip (31) starts to acquire the voltage signal of energy converter according to process shown in Fig. 6.Acquisition
A length of t (ms) when signal.After acquisition, acquisition function is closed.After transducer signal acquisition chip (31) obtains acquisition data,
It calculates analysis and obtains frequency data, be sent to serial ports.
8, receiving end main control chip (32) obtains frequency data, in the serial ports of shutdown signal acquisition by interrupting control
It is disconnected.Then data are sent to terminal by WIFI module (18).
9, receiving end main control chip (32) waits timer interruption arrival next time, then returns to step 5, starting is next time
Data acquisition.
10, when trolley (3) photoelectric door in receiving end is after No. 4 photoelectric door baffle plate frames (7-4), receiving end main control chip (32) is received
To second photoelectricity gate signal, then sends and cease and desist order to motor control chip (24) and transducer signal acquisition chip
(31), after being connected to order, motor stalls, while transducer signal acquisition chip stops data acquisition.Receiving end master control core
Piece (32) sends end signal to terminal by WIFI.
11, after terminal receives end signal, data is analyzed and are handled.In signal frequency analysis, it is averaging
Value, and pass through Lay spy's criterion of 3 times of standard deviations, bad value is removed, guarantees the accurate of frequency measurement.
Experimental work process 3
Receiving end trolley is static, transmitting terminal moving of car, and detailed process is as follows:
1, terminal (computer or mobile phone) sends control command to receiving end main control chip (32) and transmitting terminal by WIFI signal
Main control chip (35).It include the direction of motion of trolley, the information such as movement velocity in order.
2, after transmitting terminal main control chip (35) receives order, by serial ports, send start command and speed control information to
Motor control chip (24).The serial ports for opening simultaneously respectively connection photoelectric door interrupts, and waits photoelectricity gate signal.
3, after being connected to start command, motor control chip (24) according to Row control motor shown in Fig. 5, make transmitting terminal and
Receiving end energy converter is mobile with certain speed.
4, transmitting terminal trolley (3) by photoelectric door after No. 1 photoelectric door baffle plate frame (7-1), transmitting terminal main control chip
(35) photosignal is received, the receiving end main control chip (32) that WIFI module sends a signal to receiving end trolley is then passed through.
5, when receiving end main control chip (32) confirmation has received the letter that receiving end main control chip (32) is sent by WIFI
After number, start timer interruption, setting occurs once to interrupt every t (ms) time.
6, start command is sent by serial ports in interrupt routine give transducer signal acquisition chip (31).Starting is sent
After order, receiving end main control chip (32) is opened corresponding serial ports and is interrupted, and waits rs 232 serial interface signal.
7, transducer signal acquisition chip (31) starts to acquire the voltage signal of energy converter according to process shown in Fig. 6.Acquisition
A length of t (ms) when signal.After acquisition, acquisition function is closed.After transducer signal acquisition chip (31) obtains acquisition data,
It calculates analysis and obtains frequency data, be sent to serial ports.
8, receiving end main control chip (32) obtains frequency data, in the serial ports of shutdown signal acquisition by interrupting control
It is disconnected.Then data are sent to terminal by WIFI module (18).
9, receiving end main control chip (32) waits timer interruption arrival next time, then returns to step 5, starting is next time
Data acquisition.
10, when transmitting terminal trolley (4) photoelectric door is after No. 2 photoelectric door baffle plate frames (7-2), transmitting terminal main control chip (35) can be sent out
It send to cease and desist order and give motor control chip (24), motor stop motion, while transmitting terminal main control chip (35) can be sent out by WIFI
The number of delivering letters gives receiving end main control chip (32).Receiving end main control chip (32) receives the signal of transmitting terminal main control chip (35)
Afterwards, it sends to cease and desist order and gives transducer signal acquisition chip (31), after being connected to order, transducer signal acquisition chip stops data
Acquisition.Receiving end main control chip (32) sends end signal to terminal by WIFI.
11, after terminal receives end signal, data is analyzed and are handled.In signal frequency analysis, it is averaging
Value, and pass through Lay spy's criterion of 3 times of standard deviations, bad value is removed, guarantees the accurate of frequency measurement.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the scope of protection of the present invention.Therefore, protection scope of the present invention should be with the protection scope of claims
Subject to.
Claims (4)
1. wireless WIFI auto-ultrasonic Doppler effect experiment instrument, which is characterized in that changed including supersonic generator, transmitting terminal
It can device, receiving end energy converter, transmitting terminal trolley, receiving end trolley, transmitting terminal guide rail, receiving end guide rail, guide rail connection sheet, movement
Block, photosignal module, WiFi module；
Supersonic generator, for alternating current to be converted to the corresponding high-frequency alternating current of energy converter to drive energy converter to work；
Transmitting terminal energy converter for the electrical power of input to be converted into ultrasonic wave, and emits ultrasonic signal；
Receiving end energy converter is used for received ultrasonic signal, connects supersonic generator by spring electric wire；
Transmitting terminal trolley drives transmitting terminal energy converter and transmitting for installing transmitting terminal energy converter and transmitting terminal photoelectric door
End photoelectric door is moved；Transmitting terminal car interior is provided with direct current generator, motor driver, motor control chip, speed school
Positive module, power supply and gear；Power supply is direct current generator power supply, and DC motor drives, gear band motor car wheel makes transmitting terminal
Moving of car；Motor control chip is electrically connected with motor driver, and motor driver is electrically connected with direct current generator, motor control core
Piece controls DC motor speed by pwm pulse width modulated, for controlling the movement velocity of transmitting terminal trolley；Velocity correction mould
Block, by shaft coupling with DC motor shaft is concentric connect, velocity correction module is electrically connected with motor control chip, for monitoring
The actual speed of motor；
Transmitting terminal car interior is provided with transmitting terminal main control chip, is used for motor control chip, and by transmitting terminal photoelectric door and
WIFI module receives extraneous control signal, and uploads data by WIFI wireless module；Transmitting terminal main control chip and transmitting
Hold the receiving end photoelectric door electrical connection outside the motor control chip, WiFi module and receiving end trolley of car interior；
Receiving end trolley drives receiving end energy converter and reception for installing receiving end energy converter and receiving end photoelectric door
End photoelectric door is moved；Receiving end trolley direct current generator, motor driver, motor control chip, velocity correction module, power supply
And gear structure is identical as transmitting terminal trolley；
Receiving end car interior is equipped with frequency acquisition module, and the frequency acquisition module includes signal amplification module, analog-to-digital conversion
Module, storage module and transducer signal acquisition chip；Signal amplifies mould module and receiving end energy converter, analog-to-digital conversion module
Electrical connection, analog-to-digital conversion module are electrically connected with memory module, and memory module is electrically connected with transducer signal acquisition chip；Receiving end
Acoustic pressure is converted into amplifying after electric signal by signal amplification module by energy converter, is converted after transmission by analog-to-digital conversion module
At in digital quantity deposit memory module, transducer signal acquisition chip reads data from memory module；
Receiving end car interior is provided with receiving end main control chip, for motor control chip and signal acquisition chip simultaneously, and
Extraneous control signal is received by receiving end photoelectric door and WIFI module, and data are uploaded by WIFI wireless module；It connects
It the motor control chip of receiving end main control chip and receiving end car interior, transducer signal acquisition chip, WiFi module and connects
Receiving end photoelectric door electrical connection outside receiving end trolley；
Transmitting terminal guide rail makes to move in a straight line on transmitting terminal trolley along guide rail for carrying transmitting terminal trolley；With receiving end guide rail
It is oppositely arranged；
Receiving end guide rail makes to move in a straight line on transmitting terminal trolley along guide rail for carrying transmitting terminal trolley；With transmitting terminal guide rail
It is oppositely arranged；
Guide rail connection sheet, symmetrical two panels, for connecting receiving end guide rail and transmitting terminal guide rail；
Block is moved, the both ends of transmitting terminal guide rail Yu receiving end guide rail are set to, for preventing transmitting terminal trolley and receiving end small
Vehicle movement is driven out to transmitting terminal guide rail and receiving end guide rail；
Photosignal module, including transmitting terminal photoelectric door, receiving end photoelectric door and photoelectric door baffle plate frame；
Transmitting terminal photoelectric door, is mounted on front position on transmitting terminal trolley, and cooperation photoelectric door baffle plate frame determines that transmitting terminal trolley is transported
Dynamic position；
Receiving end photoelectric door, is mounted on front position on the trolley of receiving end, and cooperation photoelectric door baffle plate frame determines that receiving end trolley is transported
Dynamic position；
Photoelectric door baffle plate frame, quantity be it is multiple, be mounted on the side of transmitting terminal guide rail and receiving end guide rail, cooperation photoelectric door is true
Determine transmitting terminal trolley and receiving end moving of car position；
WiFi module is used for transmission receiving end trolley and transmitting terminal trolley main control chip data；Quantity is two, and a fixation is set
It is placed in transmitting terminal trolley to be electrically connected with transmitting terminal main control chip, another is fixedly installed on receiving end car interior and receiving end master
Control chip electrical connection.
2. wireless WIFI auto-ultrasonic Doppler effect experiment instrument as described in claim 1, which is characterized in that guide rail connection
Piece quantity is two, is L-type, including rectangular apex angle face and arched top edged surface, has on rectangular apex angle face and arched top edged surface
The rectangular apex angle face of connection sheet is close to by screw hole with the side of transmitting terminal guide rail or receiving end guide rail, passes through connection sheet with screw
Screw hole corresponding with rail-sides face fixes rectangular apex angle face and the side with transmitting terminal guide rail or receiving end guide rail of connection sheet
Connection, the arched top edged surface of connection sheet and the arched top edged surface of another connection sheet are fixedly connected on one by screw and nut
It rises.
3. wireless WIFI auto-ultrasonic Doppler effect experiment instrument as described in claim 1, which is characterized in that transmitting terminal is led
Rail and receiving end guide rail size, shape are consistent, and rail crown two sides are provided with track rib, and transmitting terminal trolley and receiving end are small
The wheel of vehicle is set on track rib, and track rib can prevent wheel movement deviation, guarantees that wheel is moved in guide rail interior,
It does not roll.
4. wireless WIFI auto-ultrasonic Doppler effect experiment instrument as described in claim 1, which is characterized in that movement block
In N-shaped structure, two sides of the bottom setting has screw hole again, cooperates screw that movement block is made to be fixed on transmitting terminal by screw hole and leads
On rail and receiving end guide rail, moves side on block and be provided with spongy layer, buffering when for being hit as trolley.
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| CN201811472044.9A CN109493699B (en) | 2018-12-04 | 2018-12-04 | Wireless WIFI automatic ultrasonic Doppler effect experimental instrument |
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| CN201811472044.9A CN109493699B (en) | 2018-12-04 | 2018-12-04 | Wireless WIFI automatic ultrasonic Doppler effect experimental instrument |
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| CN109493699B CN109493699B (en) | 2022-12-09 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2084964C1 (en) * | 1995-05-19 | 1997-07-20 | Валерий Вильгельмович Майер | Device for acoustic experiments |
| CN1987958A (en) * | 2006-12-25 | 2007-06-27 | 浙江大学 | Comprehensive test device and method of Doppler effect |
| CN201007868Y (en) * | 2007-02-09 | 2008-01-16 | 杭州大华仪器制造有限公司 | Doppler effect and sound velocity integrated experimental instrument |
| CN202003550U (en) * | 2011-03-07 | 2011-10-05 | 卢帅 | Doppler effect comprehensive experiment instrument |
| CN203616918U (en) * | 2013-11-05 | 2014-05-28 | 西安电子科技大学 | Doppler effect experimental instrument |
| CN204010433U (en) * | 2014-06-12 | 2014-12-10 | 甘肃民族师范学院 | The ultrasonic Doppler effect experimental provision that tests the speed |
-
2018
- 2018-12-04 CN CN201811472044.9A patent/CN109493699B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2084964C1 (en) * | 1995-05-19 | 1997-07-20 | Валерий Вильгельмович Майер | Device for acoustic experiments |
| CN1987958A (en) * | 2006-12-25 | 2007-06-27 | 浙江大学 | Comprehensive test device and method of Doppler effect |
| CN201007868Y (en) * | 2007-02-09 | 2008-01-16 | 杭州大华仪器制造有限公司 | Doppler effect and sound velocity integrated experimental instrument |
| CN202003550U (en) * | 2011-03-07 | 2011-10-05 | 卢帅 | Doppler effect comprehensive experiment instrument |
| CN203616918U (en) * | 2013-11-05 | 2014-05-28 | 西安电子科技大学 | Doppler effect experimental instrument |
| CN204010433U (en) * | 2014-06-12 | 2014-12-10 | 甘肃民族师范学院 | The ultrasonic Doppler effect experimental provision that tests the speed |
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| Publication number | Publication date |
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| CN109493699B (en) | 2022-12-09 |
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