CN210181837U - Two-dimensional code test question terminal - Google Patents

Abstract

The utility model discloses a two-dimension code test question terminal, which comprises a shell, a main control circuit board arranged in the shell, and a power module, a liquid crystal display module and a two-dimension code identification module which are connected with the main control circuit board; the liquid crystal display module is arranged on the front panel of the shell, and is provided with a power key and a function key used for pausing/starting the test question file being played, the liquid crystal display module is used for displaying operation prompt information, and after the two-dimension code identification module successfully identifies the test question two-dimension code, the test question content contained in the corresponding file stored in the SD card is displayed. The utility model discloses a SD card storage two-dimensional code corresponds content, and two-dimensional code storage examination question index information, the operation of off-line formula reduces the examination work degree of difficulty of keeping secret.

Description

Two-dimensional code test question terminal

Technical Field

The utility model relates to a two-dimensional code examination question terminal technical field especially relates to a two-dimensional code examination question terminal.

Background

The application type and engineering class courses relate to contents which are difficult to describe by a large number of videos, audios, complex pictures or a large number of data and other characters, are the key points of teaching, but are difficult to deeply assess through paper examination papers, computer examination systems and large-scale practical exercise examinations. The content is indexed by the two-dimensional code, and the content and the characters serving as supplementary explanations form a two-dimensional code test question together, so that the situation can be changed to a great extent.

At present, in some education training software, after learning based on a virtual simulation platform or a video, test questions are set aiming at previous learning segments, but the test questions are extremely strong in pertinence and single in type, and cannot be used for comprehensive class ending examinations. The mobile phone can also conveniently identify the two-dimension code based on a plurality of two-dimension code generation identification software of the internet, but the mobile phone of the examinee in the examination process is used as two-dimension code identification equipment, so that the difficulty of the examination process in confidentiality work is greatly increased, examination contents which have high confidentiality requirements and cannot be accessed to the internet are not allowed to be issued on the basis of network storage, and the mobile phone is used as a test question playing and displaying terminal. The examination equipment based on the two-dimension code examination questions is required to be physically isolated from the Internet, the functions are simplified to the greatest extent, the operation is simplified to the greatest extent, and a good playing and displaying effect is ensured. Therefore, it is necessary to develop a two-dimensional code test question terminal meeting the requirements of the examination equipment by means of the existing two-dimensional code identification processing and display processing technology, so as to realize identification of the two-dimensional code of the video, audio and picture type file index, and storage and playing display of corresponding contents.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the technical defect who exists among the prior art, and provide a two-dimensional code examination question terminal, through the two-dimensional code in the discernment two-dimensional code examination question to show the file content broadcast of the video that the two-dimensional code corresponds, audio frequency or picture type.

For realizing the utility model discloses a technical scheme that the purpose adopted is:

a two-dimension code test question terminal comprises a shell, a main control circuit board arranged in the shell, and a power module, a liquid crystal display module and a two-dimension code identification module which are connected with the main control circuit board; the liquid crystal display module is arranged on the front panel of the shell, and is provided with a power key and a function key used for pausing/starting the test question file being played, the liquid crystal display module is used for displaying operation prompt information, and after the two-dimension code identification module successfully identifies the test question two-dimension code, the test question content contained in the corresponding file stored in the SD card is displayed.

The main control circuit board is provided with a main control CPU, a power supply unit connected with the main control CPU and used for connecting a power supply module, an SD card unit, a liquid crystal screen driving unit used for connecting a liquid crystal display module, an audio driving unit used for connecting an earphone and a two-dimension code identification module interface unit used for connecting a two-dimension code identification module.

A panel of the shell is provided with a reset hole for a tool to be inserted to click a reset button to reset the two-dimensional code test question terminal.

One side surface of the shell is provided with an SD card socket for inserting an SD card; an SD card socket sealing cover is arranged outside the SD card socket and fixed by screws, and is used for sealing the SD card in the shell to prevent the SD card from being taken out randomly.

The side of the shell is provided with an earphone jack for inserting an earphone plug to play sound.

The right side face of the shell is provided with a lithium battery charging interface for inserting a lithium battery charger plug to charge a lithium battery.

A side panel of the shell is provided with a circular truncated cone-shaped bulge which is a two-dimension code recognition module mounting position and is used for mounting the two-dimension code recognition module.

Compared with the prior art, the beneficial effects of the utility model are that:

the terminal of the utility model is composed of the main control circuit board, the liquid crystal display module and the two-dimension code scanning module as core hardware, has stable performance, adopts the SD card to store the two-dimension code corresponding file content, stores the examination question index information by the two-dimension code, and reduces the difficulty of examination secrecy work by off-line operation; the function is simple and reliable, convenient to use, accords with the equipment requirement for the examination.

Drawings

Fig. 1 is a three-dimensional structure diagram of a two-dimensional code test question terminal.

FIG. 2 is another three-dimensional structure diagram of a two-dimensional code test question terminal

Fig. 3 is a block diagram of the main control circuit board.

Fig. 4 is a schematic diagram of a pin connection of a main control chip of a power supply unit.

FIG. 5 is a schematic diagram of SD card slot pin connections of the SD card unit.

Fig. 6 is a schematic diagram of the connection of the liquid crystal panel driving unit.

Fig. 7 is a schematic diagram of the connection of the audio driving unit.

Fig. 8 is a pin connection diagram of an interface unit of a two-dimensional code recognition module.

FIG. 9 is a schematic diagram of the connection of the crystal oscillator, the reset unit and the function key unit.

In the figure: 1. the mobile phone comprises a shell, a liquid crystal display module, a function key, a power key, an SD card socket sealing cover, a reset hole, a lithium battery charging interface, an earphone socket, a two-dimensional code recognition module mounting position and a battery charging interface, wherein the liquid crystal display module is 2, the function key is 3, the power key is 4, the SD card socket sealing cover is 5, the reset hole is 6, the lithium battery charging interface is 7.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The utility model discloses a content to being difficult to description of characters such as a large amount of videos, audio frequency and complicated picture or a large amount of data in application type, engineering class course passes through the problem that paper examination paper, computer examination system, extensive real operation examination are difficult to go deep into the examination and proposes, and it can realize two-dimensional code discernment, examination question storage and the demonstration to the two-dimensional code examination question, provides a terminal equipment scheme that more convenient operation, function are reliable, accord with the examination requirement for the examination based on the two-dimensional code examination question.

As shown in fig. 1-2, the two-dimension code test question terminal of the present invention comprises a housing 1, a power module, a liquid crystal display module 2, a two-dimension code recognition module, and a main control circuit board; the casing is used for supporting, installing and containing the main control circuit board and other parts, and install liquid crystal display module 2, power key 4, function button 3 on the casing front panel, liquid crystal display module is used for showing operation prompt message, shows the examination question content that the SD card storage corresponds the file and contains after the examination question two-dimensional code is successfully discerned, and the power key is used for switching on or off the power at two-dimensional code examination question terminal, and the function button is used for pausing/beginning the examination question file that is playing, including audio frequency/video file.

The front panel of the shell is provided with a reset hole 6, corresponds to a reset key on the main control circuit board below the front panel and is used for inserting a slender tool to click the key below to reset the two-dimensional code test question terminal.

The lower side surface of the shell is provided with an SD card slot which corresponds to the SD slot of the main control circuit board and is used for inserting an SD card. An SD card socket sealing cover 5 is arranged outside the SD card socket and fixed by screws and used for sealing the SD card in the shell so as to prevent the SD card from being taken out randomly.

The right side face of the shell is provided with an earphone jack 8 which corresponds to a 3.5 mm earphone jack of the main control circuit board and is used for inserting an earphone plug to play sound.

The right side face of the shell is provided with a lithium battery charging interface 7, corresponds to a power module charging interface and is used for inserting a lithium battery charger plug to charge a lithium battery.

The rear panel of the shell is provided with a mounting position 9 of the two-dimension code recognition module, which is a circular truncated cone-shaped bulge and used for mounting the two-dimension code recognition module.

The power module comprises a lithium battery and a voltage conversion module. The lithium battery is 7.4V2S1200mAh, the voltage conversion module is an LM2596S adjustable voltage-stabilized power supply module and is used for converting 7.4V voltage of the lithium battery into 5V power supply voltage of the main control circuit board, and the voltage conversion module is connected with a power supply unit on the main control circuit board.

The liquid crystal display module is a 7-inch TFT liquid crystal screen, has a resolution of 800 multiplied by 480 and is used for displaying pictures, audio playing progress bars, video pictures and the like corresponding to the test question two-dimensional codes.

Wherein, the two-dimensional code identification module be XR2500MT two-dimensional code identification module, TTL output interface for discern the two-dimensional code. The two-dimension code recognition module is connected with the main control CPU and the power supply unit through the recognition module interface unit, and has the advantages of no need of programming, direct transmission of recognition results through TTL, high recognition speed, small size and the like.

As shown in fig. 3, the main control circuit board is a core of the two-dimensional code test question terminal, and includes a main control CPU, a power supply unit, an SD card unit, a liquid crystal display driving unit, an audio driving unit, a two-dimensional code identification module interface unit, a crystal oscillator, a reset unit, a function key unit, and other peripheral elements.

The main control CPU is an STM32F407ZGT6 chip and is used for completing two-dimensional code identification and test question display control processes, the chip is high in configuration, the maximum main frequency can reach 168MHz, the chip is provided with 192KB SRAM, 1024KB FLASH, 6 serial ports and 1 FSMC interface, the FSMC screen brushing speed can reach 3300W pixels/second, and a large-size liquid crystal screen can be driven.

The power supply unit adopts the AMS1117-3.3LDO integrated stabilized voltage power supply as a main control chip, and is used for reducing the voltage of a 5V power supply to 3.3V and providing 3.3V power supply for each module, as shown in FIG. 4.

The SD card unit is used for accommodating an SD card, completing the card reading function and providing contents corresponding to the two-dimensional code. The SD card slot is composed of an SD card slot and 5 resistors, wherein a DATA0-3 pin of the SD card slot is respectively connected with a GPIO8-11 pin (multiplexed as an SDIO _ D0-3 pin) of a main control CPU, a CLK pin of the SD card slot is connected with a GPIOC12/SDIO _ SCK pin of the main control CPU, and a CMD pin of the SD card slot is connected with a GPIOD2/SDIO _ CMD pin of the main control CPU; the DATA0-3 and CMD pins of the SD card slot are simultaneously connected to the 3.3V power supply through resistors R2-6, as shown in FIG. 5.

The liquid crystal screen driving unit is mainly electrically connected with a main control CPU and a liquid crystal screen interface and is used for connecting the main control CPU and the liquid crystal screen, so that data transmission and control signals are realized, and the content display function of the liquid crystal screen is realized. The data bus D0-15 of the LCD screen interface is connected with the FSMC _ D0-15 of the main control CPU, and the pins LCD _ CS, RS, WR/CLK, RD, RST and BL of the LCD screen interface are respectively connected with the FSMC _ NE4, FSMC _ A6, FSMC _ NWE, FSMC _ NOE, RESET and GPIOB15 of the main control CPU, as shown in FIG. 6.

The audio driving unit is used for realizing data and control signal connection, digital/analog signal conversion and analog signal playing, and comprises an audio driving chip, an earphone jack, an auxiliary resistor and capacitor and the like. The audio driving chip is a WM S chip, is a full-function audio processor, is provided with an HI-FI level digital signal processing kernel, can effectively improve the tone quality, has an I2S interface, and supports the highest 192K and 24bit audio playing. The main signal connection is that the LRC, BCLK, ADCDAT, DACDAT, MCLK of the audio driver chip WM S are connected to I2S _ LRCK, I2S _ SCLK, I2S _ SDOUT, I2S _ SDIN, I2S _ MCLK of the main control CPU, respectively, to form data and control signal connection, the MODE pin of the audio driver chip WM S is grounded through a resistor R7, two output pins of ROUT1 and LOUT1 are connected to two output pins of the 3.5 inch earphone interface through capacitors C2 and C3, respectively, and the other pin of the 3.5 inch earphone interface is grounded. The master control CPU can transmit the sound to be played to the audio driver WM 2S through I2S bus, and the chip converts the digital signal into analog signal and outputs the analog signal to the earphone for playing, as shown in fig. 7.

The two-dimension code identification module interface unit is used for connecting the two-dimension code identification module and the main control CPU to realize data and control signal transmission. The two-dimensional code recognition module is electrically connected, wherein the power supply of the two-dimensional code recognition module is 5V, a TX pin is connected with GPIOA10/USART1_ RX of a main control CPU, and GND of the two modules is connected. The data output format of the two-dimensional code identification module is TTL, and can be directly read by the USART pin of the main control CPU, thereby simplifying the hardware design, as shown in fig. 8.

The crystal oscillator adopts a 32.768K crystal, two pins of the crystal are respectively connected with OSC32_ IN and OSC32_ OUT of the main control CPU, and the two pins of the crystal are grounded through two capacitors C4 and C5 to provide a clock source for the main control CPU, as shown IN fig. 9.

The RESET unit adopts a common RC circuit, a 3.3V power supply is connected with a resistor R1 and a capacitor C1 and then grounded, a key SW1 is connected with the capacitor C1 in parallel, and the resistor R1 is connected with the capacitor C1 and simultaneously connected with a RESET pin of the main control CPU. The RESET pin remains high, and when the key is pressed, the pin is changed from high to low, and the main control CPU RESETs, as shown in fig. 9.

The functional key unit is a key SW2, one end of the key is connected to a GPIOE2 pin of the main control CPU, and the other end is grounded, so as to pause/start the audio/video being played, as shown in fig. 9.

When the SD card works, the main control CPU searches a corresponding file in the SD card according to the identified two-dimension code information, and then plays and displays the content or information of the found file through the liquid crystal display module.

It should be noted that the terminal of the present invention is divided into a pre-operation and a use operation.

The examination proposition person carries out the prior operation: when proposing a question, generating a two-dimensional code from test question contents to be stored by using the two-dimensional code, placing the two-dimensional code at a proper position when typesetting a test paper or developing a computer examination system, printing the two-dimensional code and text contents on the test paper or displaying the two-dimensional code on a screen, storing a file named according to a naming rule into an SD card according to a specified storage path, and inserting the SD card into the two-dimensional code test question terminal.

The examiner executes the use operation that after the computer is started, the user can use the computer after an interface appears, the camera on the terminal is aligned to the two-dimensional code in the paper examination paper or the computer examination system test question, when the click prompt tone is heard to indicate that the code scanning is successful, the content corresponding to the two-dimensional code is displayed in the right display area of the screen immediately. The video and audio contents can be automatically and repeatedly played, and the video and audio contents which are being played can be paused/started by pressing a function key; the power key can be directly pressed to start and shut down.

Example of the preliminary operation:

if the encoding format of the picture is "pxxyyy", it is suggested that XX represents year and YYYY represents number.

For example: the picture is encoded as the test question content as P180001. And generating the two-dimensional code by specific two-dimensional code generation software. The examination proposition person combines the two-dimensional code and the examination question together, and simultaneously saves the PICTURE corresponding to the two-dimensional code under the SD card PICTURE directory by taking P180001.jpg as a file name.

The coding format of the audio is "sxxyyy", it is proposed that XX stands for year and YYYY stands for number.

For example, audio is encoded as test question content as S180003. And generating the two-dimensional code by specific two-dimensional code generation software. The examination proposition person combines the two-dimensional code and the examination question together, and simultaneously saves the audio corresponding to the two-dimensional code under the SD card MUSIC directory by taking S180003.wav as a file name.

The video is encoded in the format "vxxyyy", and XX is suggested for year and YYYY for number.

For example, video is encoded as test question content as V180005. And generating the two-dimensional code by specific two-dimensional code generation software. The examination proposition person combines the two-dimensional code and the examination question together, and simultaneously saves the VIDEO corresponding to the two-dimensional code under the SD card VIDEO directory by taking V180005.avi as the file name.

And after the corresponding contents of all the two-dimensional codes are stored, taking the SD card out of the theme computer, inserting the SD card into the SD card socket of the two-dimensional code test question terminal, and covering and sealing the SD card socket sealing cover.

Before the examination, the two-dimensional code examination question terminal and the examination paper are issued to the examiner together.

Using an example of operation:

in the using process, the power key can be pressed at any time to turn off the computer, and the function key can be pressed to pause/start the current display content.

And starting the computer, wherein the examiner starts the computer by pressing a power key, and the scanning can be started after an interface appears.

Scanning, the camera aims at the two-dimensional code in the paper, pay attention to adjusting the camera position, makes the red light spot that it sent fall on two-dimensional code central point, according to the suitable adjusting distance of two-dimensional code size difference, generally in 3 ~ 5 centimetres department, when hearing "a sound of dripping", sweep the sign indicating number and succeed. If continuous 'drip' sound is emitted, the scanning is not successful, and the code needs to be scanned again. The next scan can be started again after the power key is pressed repeatedly to restart if necessary.

And (4) watching the test question content, and displaying the test question content corresponding to the two-dimensional code in a display area on the right side of the screen after the code scanning is successful.

For example: after scanning the two-dimensional code, a picture coded as P180001 is displayed. The screen display area displays a picture.

After scanning the two-dimensional code, the audio encoded as S180003 is played. The content displayed in the screen display area is the basic information of the audio file S180003.wav under the MUSIC directory, including path, file name, playing time/total time, bit rate and audio position/total audio frequency, and the audio frequency is played through an earphone.

After the two-dimensional code is scanned, a video coded as V180005 is played, the video is played in a screen display area, the current playing time/total video time is displayed above the video, and the audio is played through an earphone.

The utility model discloses a code module discernment two-dimensional code is swept to the two-dimensional code, under master control CPU's control, through the content that the LCD screen display two-dimensional code corresponds, provides the terminal equipment scheme that simple function is reliable, convenient to use for using the examination question implementation examination of two-dimensional code.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (7)

1. A two-dimension code test question terminal is characterized by comprising a shell, a main control circuit board arranged in the shell, and a power module, a liquid crystal display module and a two-dimension code identification module which are connected with the main control circuit board; the liquid crystal display module is arranged on the front panel of the shell, and is provided with a power key and a function key used for pausing/starting the test question file being played, the liquid crystal display module is used for displaying operation prompt information, and after the two-dimension code identification module successfully identifies the test question two-dimension code, the test question content contained in the corresponding file stored in the SD card is displayed.

2. The two-dimensional code test question terminal of claim 1, wherein the main control circuit board is provided with a main control CPU, a power supply unit connected with the main control CPU and used for connecting a power supply module, an SD card unit, a liquid crystal display driving unit connected with a liquid crystal display module, an audio driving unit connected with an earphone, and a two-dimensional code recognition module interface unit connected with a two-dimensional code recognition module.

3. The two-dimensional code test question terminal of claim 1, wherein a panel of the housing is provided with a reset hole for a tool to be inserted to click a reset button to reset the two-dimensional code test question terminal.

4. The two-dimensional code test question terminal of claim 1, wherein one side of the housing is provided with an SD card socket for inserting an SD card; an SD card socket sealing cover is arranged outside the SD card socket and fixed by screws, and is used for sealing the SD card in the shell to prevent the SD card from being taken out randomly.

5. The two-dimensional code test question terminal of claim 1, wherein an earphone jack is provided on a side surface of the housing for inserting an earphone plug to play sound.

6. The two-dimensional code test question terminal of claim 1, wherein the right side of the housing is provided with a lithium battery charging interface for inserting a lithium battery charger plug to charge a lithium battery.

7. The two-dimensional code test question terminal of claim 1, wherein a side panel of the housing is provided with a mounting position for the two-dimensional code recognition module as a truncated cone-shaped protrusion for mounting the two-dimensional code recognition module.

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