CN206601692U - A kind of electric whiteboard system based on ARM - Google Patents

A kind of electric whiteboard system based on ARM Download PDF

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Publication number
CN206601692U
CN206601692U CN201720029213.6U CN201720029213U CN206601692U CN 206601692 U CN206601692 U CN 206601692U CN 201720029213 U CN201720029213 U CN 201720029213U CN 206601692 U CN206601692 U CN 206601692U
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CN
China
Prior art keywords
signal
arm
ultrasonic
infrared
module
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Expired - Fee Related
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CN201720029213.6U
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Chinese (zh)
Inventor
吴大非
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Hunan University of Science and Engineering
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Hunan University of Science and Engineering
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Priority to CN201720029213.6U priority Critical patent/CN206601692U/en
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Publication of CN206601692U publication Critical patent/CN206601692U/en
Expired - Fee Related legal-status Critical Current
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Abstract

The utility model discloses a kind of electric whiteboard system based on ARM, including signal emission module, signal acquisition module and signal processing module, the signal emission module is arranged in sign pen, produce infrared signal and ultrasonic signal, the signal acquisition module is set in signal receiver on a display panel, gather the infrared signal and ultrasonic signal produced by the signal emission module, the signal processing module is integrally disposed in an arm processor, the arm processor is connected by a controller with the signal receiver, the arm processor receive and handle infrared signal and ultrasonic signal after, presented on said display panel by a projector.The utility model can it is efficient, light, economically realize electronic whiteboard function, can preferably apply to learn, work and stress-relieving activity.

Description

A kind of electric whiteboard system based on ARM
Technical field
The utility model is related to computer education and application technical field, and in particular to a kind of electronic whiteboard system based on ARM System.
Background technology
The development of IT application in education sector, it is also proposed more next in new challenge, teaching classroom to our the daily patterns attended class More the interaction of attention teacher and student and content is rich and varied, and traditional blackboard adds the teaching pattern of chalk to fit Answer this demand.Though the solution based on projecting apparatus, real object exhibition booth, computer etc. commonly used at present in multi-media classroom Though so can easily be preceding by the present student of the colourful content of courses such as material object, computer teaching courseware, video, audio, But the writing on the blackboard with teacher has some conflicts.The equipment used in multimedia teaching, such as projection screen, teacher can not be straight above Connect writing and annotate, teacher needs the frequent switching between computer console and blackboard, and this brings very to the teaching of teacher Big inconvenience.Until in recent years, the appearance of the product such as electronic whiteboard just progressively solves this problem.
Electronic whiteboard has the basic function of blackboard, can free writing on the blackboard, in its plate face can immediately writing words and Hand-drawing graphics;On the other hand, electronic whiteboard can easily show, handle and store various digitized teaching materials, so that Enrich the content of teaching.And current writing on the blackboard content can be preserved with the file of multiple format at any time, the standby shelves in computer, with Standby next class is reused or left for student and reviews after class.
Utility model content
The purpose of this utility model is a kind of electric whiteboard system based on ARM of offer, being capable of efficient, light, economy Electronic whiteboard function is realized on ground, can preferably be applied to learn, be worked and stress-relieving activity.
To achieve the above object, specifically, the utility model provides following technical scheme:
A kind of electric whiteboard system based on ARM, including signal emission module, signal acquisition module and signal transacting mould Block, the signal emission module is arranged in sign pen, produces infrared signal and ultrasonic signal, and the signal acquisition module is set In signal receiver on a display panel, infrared signal and ultrasonic signal produced by the collection signal emission module, institute State signal processing module to be integrally disposed in an arm processor, the arm processor is received by a controller and the signal Device connect, the arm processor receive and handle infrared signal and ultrasonic signal after, by a projector in the display panel It is upper to present.
Further, the signal emission module includes signal generating circuit, drive circuit and ultrasonic wave transmitting sensing Device and infrared emitting sensor, the signal generating circuit control the ultrasonic wave emission sensor by the drive circuit With the generation infrared signal and ultrasonic signal of the infrared emitting cycle sensor.
Further, the signal acquisition module includes multistage amplifier circuit, shaping circuit and DSP Processor, described Ultrasonic signal includes left ultrasonic signal and right wing ultrasonic signal, the left ultrasonic signal and right wing ultrasonic signal difference By being sent to the DSP Processor after the multistage amplifier circuit, shaping circuit processing, the DSP Processor is to institute State left ultrasonic signal and the right wing ultrasonic signal enters after line delay is extracted to be sent to the signal processing module;It is described infrared Signal enters line delay by being sent to the DSP Processor, the DSP Processor after the shaping circuit to the infrared signal The signal processing module is sent to after extraction.
Further, the signal processing module includes arm processor, power supply and its reset circuit, SM501 display electricity Road, audio unit, clock unit and network interface card unit;It is the power supply and its reset circuit, the SM501 display circuits, described Audio unit, the clock unit and the network interface card unit are electrically connected with the arm processor, and the arm processor passes through One main USB interface receive information acquisition module delay ultrasonic signal and infrared signal;Shown in real time by the SM501 circuits In a lcd display, the LCD display is arranged in display panel.
Further, the signal processing module also includes SDRAM, Nand Flash, from USB interfaces, the SDRAM, The Nand Flash, described it is electrically connected with from USB interface and the arm processor.
The utility model method has the following advantages that:
Arm processor is employed in electric whiteboard system of the present utility model as core devices, be integrated with data storage, A variety of functions such as network service, audio, video playback, can it is efficient, light, economically realize electronic whiteboard function, Neng Gougeng Apply to well learn, work and stress-relieving activity.
Brief description of the drawings
Fig. 1 electric whiteboard system construction module block diagrams of the present utility model.
Fig. 2 electric whiteboard system composition structural representations of the present utility model.
Signal emission module structured flowchart in Fig. 3 electric whiteboard systems of the present utility model.
Signal acquisition module structured flowchart in Fig. 4 electric whiteboard systems of the present utility model.
Fig. 5 is signal processing module structured flowchart in electric whiteboard system of the present utility model.
Fig. 6 is electric whiteboard system positioning principle schematic diagram of the present utility model.
Wherein, 10- display panels, 20- projectors, 30-ARM processors, 40- controllers, 50- sign pens, 60- signals Receiver.
Embodiment
Following examples are used to illustrate the utility model, but are not limited to scope of the present utility model.
Embodiment 1
As shown in Figure 1, 2, a kind of electric whiteboard system based on ARM, including signal emission module, signal acquisition module with And signal processing module, the signal emission module is arranged in sign pen 50, produces infrared signal and ultrasonic signal, the letter Number acquisition module is arranged in the signal receiver 60 on display panel 10, gathers red produced by the signal emission module External signal and ultrasonic signal, the signal processing module are integrally disposed in an arm processor 30, and the ARM processors 30 lead to Cross a controller 40 to be connected with the signal receiver 60, the arm processor 30 receives and handles infrared signal and ultrasound letter After number, presented by a projector on the display panel 10.
Further, the signal emission module includes signal generating circuit, drive circuit and ultrasonic wave transmitting sensing Device and infrared emitting sensor, the signal generating circuit control the ultrasonic wave emission sensor by the drive circuit With the generation infrared signal and ultrasonic signal of the infrared emitting cycle sensor.
As shown in figure 3, signal emission module is arranged in sign pen, during writing, the pressure between nib and clipboard makes Power in pen;Sign pen starts ultrasound, infrared signal by periodic emission of 17ms.When stopping writing, nib and book Write plate and disconnect contact, an interior power disconnects, sign pen is stopped.
As shown in figure 4, the signal acquisition module includes multistage amplifier circuit, shaping circuit and DSP Processor, institute Stating ultrasonic signal includes left ultrasonic signal and right wing ultrasonic signal, the left ultrasonic signal and the right wing ultrasonic signal point Not by being sent to the DSP Processor, the DSP Processor pair after the multistage amplifier circuit, shaping circuit processing The left ultrasonic signal and the right wing ultrasonic signal, which enter after line delay is extracted, is sent to the signal processing module;It is described red External signal is prolonged by being sent to the DSP Processor, the DSP Processor after the shaping circuit to the infrared signal When extract after be sent to the signal processing module.
As shown in figure 5, the signal processing module includes arm processor, power supply and its reset circuit, SM501 display electricity Road, audio unit, clock unit and network interface card unit;It is the power supply and its reset circuit, the SM501 display circuits, described Audio unit, the clock unit and the network interface card unit are electrically connected with the arm processor, and the arm processor passes through One main USB interface receive information acquisition module delay ultrasonic signal and infrared signal;Shown in real time by the SM501 circuits In a lcd display, the LCD display is arranged in display panel.
Wherein, the signal processing module also includes SDRAM, Nand Flash, from USB interface, the SDRAM, described Nand Flash, described it is electrically connected with from USB interface and the arm processor.
The aerial spread speed of infrared signal is the light velocity, the aerial biography of ultrasonic signal retouch speed be 340 meters/ Second, for ultrasonic signal, it is infrared transmitted in the range of blank required for time can ignore, therefore can will be infrared Signal is as reference signal, and the time required for by calculating ultrasonic signal from sign pen to ultrasonic signal receivers is come to writing The position of pen is accurately positioned.
Wherein, the arm processor is the S3C2440X of Samsung of South Korea production, and it uses the 16/32 of ARM companies Position ARM920T processor cores, maximum operating frequency 533MHZ. S3C2440X by ARMTDMI, MMU memory management unit (MMU) and The part of cache three is constituted, and wherein MMU is used to manage virtual memory, and cache is by 16KB Instruction Caches and 16KB data Cached is constituted.There are two internal coprocessors in addition:CP14 and CP15, CP14 are used for debugging control, and CP15 is used to store System is controlled and testing and control.
As shown in fig. 6, sign pen launches infrared signal, signal acquisition module is responsible for collection ultrasonic signal from sign pen to super Required for sound reception sensor time (using infrared signal as ultrasonic signal timing fiducial time, when infrared signal reach When receiving sensor, sonac starts timing), it is received by the left in the display panel upper left corner positioned at electronic whiteboard and passed Sensor A, right wing receive sensor B and DSP Processor composition, and two ultrasonic receiver spacing are definite value D, and left receiver A is received The signal that sign pen is sent is used for the distance between measurement signal P to ultrasonic receiver A, and right wing ultrasonic receiver B receives letter The signal that number pen is sent is used for the distance between measurement signal P to receiver B.And delay data is processed into by DSP Processor Along with the color of sign pen and lift information of starting to write are sent to arm processor.
Although above having made detailed description to the utility model with generality explanation and specific embodiment, On the basis of the utility model, it can be made some modifications or improvements, this is apparent to those skilled in the art 's.Therefore, the these modifications or improvements on the basis of without departing from the utility model spirit, belonging to the utility model will Seek the scope of protection.

Claims (5)

1. a kind of electric whiteboard system based on ARM, it is characterised in that:Including signal emission module, signal acquisition module and Signal processing module, the signal emission module is arranged in sign pen, produces infrared signal and ultrasonic signal, and the signal is adopted Collect module to set in signal receiver on a display panel, gather infrared signal produced by the signal emission module and super Acoustical signal, the signal processing module is integrally disposed in an arm processor, and the arm processor passes through a controller and institute State signal receiver connection, the arm processor receive and handle infrared signal and ultrasonic signal after, by a projector in institute State and presented on display panel.
2. a kind of electric whiteboard system based on ARM according to claim 1, it is characterised in that:The signal launches mould Block includes signal generating circuit, drive circuit and ultrasonic wave emission sensor and infrared emitting sensor, the signal production Raw circuit controls the ultrasonic wave emission sensor and the infrared emitting cycle sensor by the drive circuit Produce infrared signal and ultrasonic signal.
3. a kind of electric whiteboard system based on ARM according to claim 1, it is characterised in that:The signal acquisition mould Block includes multistage amplifier circuit, shaping circuit and DSP Processor, and the ultrasonic signal includes left ultrasonic signal and right wing is super Acoustical signal, the left ultrasonic signal and the right wing ultrasonic signal pass through the multistage amplifier circuit, shaping electricity respectively The DSP Processor is sent to after the processing of road, the DSP Processor is to the left ultrasonic signal and the right wing ultrasonic signal Enter after line delay is extracted and be sent to the signal processing module;The infrared signal is described by being sent to after the shaping circuit DSP Processor, the DSP Processor, which enters to the infrared signal after line delay is extracted, is sent to the signal processing module.
4. a kind of electric whiteboard system based on ARM according to claim 1, it is characterised in that:The signal transacting mould Block includes arm processor, power supply and its reset circuit, SM501 display circuits, audio unit, clock unit and network interface card unit; The power supply and its reset circuit, the SM501 display circuits, the audio unit, the clock unit and the network interface card list First to be electrically connected with the arm processor, the arm processor is delayed super by a main USB interface receive information acquisition module Acoustical signal and infrared signal;By SM501 circuits display in real time, in a lcd display, the LCD display is arranged on aobvious Show in panel.
5. a kind of electric whiteboard system based on ARM according to claim 4, it is characterised in that:The signal transacting mould Block also includes SDRAM, Nand Flash, from USB interface, the SDRAM, the Nand Flash, described from USB interface and institute State arm processor electric connection.
CN201720029213.6U 2017-01-11 2017-01-11 A kind of electric whiteboard system based on ARM Expired - Fee Related CN206601692U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720029213.6U CN206601692U (en) 2017-01-11 2017-01-11 A kind of electric whiteboard system based on ARM

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720029213.6U CN206601692U (en) 2017-01-11 2017-01-11 A kind of electric whiteboard system based on ARM

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109949622A (en) * 2017-12-21 2019-06-28 北京丰信达科技有限公司 A kind of electronic whiteboard of wisdom blackboard

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109949622A (en) * 2017-12-21 2019-06-28 北京丰信达科技有限公司 A kind of electronic whiteboard of wisdom blackboard

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20171031

Termination date: 20190111

CF01 Termination of patent right due to non-payment of annual fee