CN102662359B - A New Type of Intelligent Examination Room Management System - Google Patents

Abstract

The invention discloses a novel intelligent examination room management system belonging to the technical field of wireless sensor networks and automation. Its structure is as follows: the time management and sending equipment are respectively connected to the receiving terminal of the first examination room to the receiving terminal of the nth examination room through the ZigBee/IEEE802.15.4 channel. The beneficial effects of the present invention are as follows: 1) The fairness of the examination is ensured, and the possibility of misoperation by invigilators is reduced. 2) The wireless connection is reliable and stable, with strong anti-interference. 3) It greatly reduces the amount of operation of the invigilators, thereby significantly reducing the possibility of misoperation, and can improve the fairness of the listening test and even various large-scale tests. 4) The present invention is simple to implement and low in cost.

Description

A New Type of Intelligent Examination Room Management System

technical field

The invention belongs to the technical field of wireless sensor networks and automation, and in particular relates to a novel intelligent examination room management system.

Background technique

At present, due to the absence of a unified time reference for large-scale national examinations, the invigilators in each examination room can only estimate and judge the start and end of the examination time according to the watch they carry or the examination bell. The sending and receiving time of the test papers in the test room is inconsistent, which affects the fairness of the test to a certain extent. Even some test centers have to send special personnel to notify the invigilators in each test room to perform various operations by blowing whistles. This method not only wastes manpower, but also makes it easier for the invigilators to make misoperations due to the single signal. Seriously affect the emotions of candidates and damage the rights and interests of candidates. In addition, in order to prevent candidates from cheating by using mobile phones and other wireless devices during the exam, a mobile phone shielding device is usually arranged in each exam room to block multiple wireless channels. The shielding device is powered by 220VAC. Some exams (such as CET-4 and CET-6) require the shielding device to be turned off during the listening stage, which increases the complexity of the invigilator's operation. Some examination rooms may not turn off the shielding in time due to the negligence of the invigilator. The quality of the hearing signal in the examination room is reduced, thus affecting the fairness of the examination.

In view of the above situation, the test center needs a common intelligent test room management system to synchronize the time of each test room in the test center, optimize the test environment, and ensure the fairness of the test.

Contents of the invention

The present invention discloses a novel intelligent examination room management system aiming at the above defects. The purpose of the present invention is to solve the problem of inconsistent time in the examination room described in the background technology, and on this basis, functions such as voice prompts in the examination room, automatic opening and closing of the shielding instrument in the examination room, etc. are added.

The structure of a new type of intelligent examination room management system is as follows: the time management and distribution equipment are respectively connected to the receiving terminal of the first examination room to the receiving terminal of the nth examination room through the ZigBee/IEEE802.15.4 channel; n≥1;

The structure of the time management and distribution equipment is as follows: the computer is connected to the USB/UART chip (USB end), the first MCU is respectively connected to the USB/UART chip (UART end), the first CC2530 chip, the first programming interface, the first power supply circuit, The first reset circuit and the first crystal oscillator, the first CC2530 chip is respectively connected to the second crystal oscillator, the second power supply circuit, the first radio frequency circuit, the second reset circuit and the second programming interface; the first microcontroller, USB/UART chip, the first The programming interface, the first power supply circuit, the first reset circuit and the first crystal oscillator form the first microcontroller module; the first CC2530 chip, the second crystal oscillator, the second power supply circuit, the first radio frequency circuit, the second reset circuit and the second programming interface Constitute the coordinator module;

The structure of the receiving terminal in the first examination room to the receiving terminal in the nth examination room with the same structure is as follows: the second CC2530 chip is respectively connected to the third crystal oscillator, the third power supply circuit, the second radio frequency circuit, the third reset circuit and the third programming interface; The two microcontrollers are respectively connected to the second CC2530 chip, the fourth programming interface, the relay drive circuit, the fourth power supply circuit, the UART/RS485 conversion circuit, the fourth crystal oscillator, the speaker drive circuit and the fourth reset circuit; the second CC2530 chip, the third crystal oscillator , the third power supply circuit, the second radio frequency circuit, the third reset circuit and the third programming interface constitute the router module, the second single-chip microcomputer, the fourth programming interface, the relay drive circuit, the fourth power supply circuit, the UART/RS485 conversion circuit, the fourth The crystal oscillator, the loudspeaker drive circuit and the fourth reset circuit constitute the second single-chip microcomputer module;

The LED display is connected to the UART/RS485 conversion circuit through the RS485 bus, and the speaker is connected to the speaker drive circuit.

The relay drive circuit is connected to the relay, one end of the relay has a 220VAC plug, and the 220VAC plug is assembled with the socket of the 220VAC power supply, so that the relay is connected to the 220VAC power supply, and the other end of the relay has a 220VAC jack, and the 220VAC jack is connected to the shielding instrument The plugs are assembled together so that the relay is connected to the shielding instrument; the relay and the shielding instrument constitute the shielding instrument control module.

The computer is equipped with a Windows operating system and test management software, and it is connected to a USB/UART chip (USB end) through a USB interface.

The USB/UART chip (UART end) is connected to UART0 of the first single-chip microcomputer.

Both the first programming interface and the fourth programming interface are JTAG interfaces;

The frequencies of the first crystal oscillator and the fourth crystal oscillator are both 8MHz;

The frequencies of the second crystal oscillator and the third crystal oscillator are both 32MHz;

The models of the first single-chip microcomputer and the second single-chip microcomputer are both MSP430F149.

The time management and distribution equipment is set in the test center, and the receiving terminal of the first test room to the nth test room are respectively installed in the first test room to the nth test room.

The LED display screen includes a driver chip and an LED dot matrix screen.

The beneficial effects of the present invention are:

1) By setting up a time management and issuing device, the examination time information and voice prompt information are uniformly issued, so that the time of each examination room is unified, which ensures the fairness of the examination and reduces the possibility of misoperation by the invigilators.

2) The time management and distribution equipment and the receiving terminals of each examination room are connected in a wireless manner, which reduces the construction process of wiring and reduces construction costs. The wireless channel is based on the ZigBeePro protocol and the IEEE802.15.4 standard, the wireless connection is reliable and stable, and the anti-interference is strong.

3) By designing a shielding instrument control module, the shielding instrument can work automatically, which greatly reduces the amount of operation of the invigilators, thereby significantly reducing the possibility of misoperation, and can improve the fairness of listening tests and various large-scale tests.

4) The present invention is simple to implement and low in cost. It can be applied to all levels and types of large-scale test centers by simply modifying the software program on the computer of the test center management center. It is very convenient for large-scale promotion and application, and has significant economic and social benefits. .

Description of drawings

Fig. 1 is the overall structure diagram of the present invention;

Figure 2 is a composition diagram of time management and distribution equipment;

Figure 3 is a composition diagram of the receiving terminal in the examination room.

Detailed ways

Below in conjunction with accompanying drawing, the present invention is described in further detail:

As shown in Figure 1, the structure of a new type of intelligent examination room management system is as follows: the time management and distribution equipment are respectively connected to the receiving terminal of the first examination room to the receiving terminal of the nth examination room through ZigBee/IEEE802.15.4 channel 1; n≥1;

As shown in Figure 2, the structure of the time management and distribution equipment is as follows: the computer is connected to the USB/UART chip, and the first MCU is respectively connected to the USB/UART chip, the first CC2530 chip, the first programming interface, the first power supply circuit, the first The reset circuit and the first crystal oscillator, the first CC2530 chip is respectively connected to the second crystal oscillator, the second power supply circuit, the first radio frequency circuit, the second reset circuit and the second programming interface; the first single-chip microcomputer, USB/UART chip, and the first programming interface , the first power supply circuit, the first reset circuit and the first crystal oscillator form the first microcontroller module; the first CC2530 chip, the second crystal oscillator, the second power supply circuit, the first radio frequency circuit, the second reset circuit and the second programming interface form a coordination device module;

As shown in Figure 3, the structure of the first test room receiving terminal to the nth test room receiving terminal with the same structure is as follows: the second CC2530 chip is respectively connected to the third crystal oscillator, the third power supply circuit, the second radio frequency circuit, the third reset circuit and The third programming interface; the second microcontroller is respectively connected to the second CC2530 chip, the fourth programming interface, the relay drive circuit, the fourth power supply circuit, the UART/RS485 conversion circuit, the fourth crystal oscillator, the speaker drive circuit and the fourth reset circuit; the second The CC2530 chip, the third crystal oscillator, the third power supply circuit, the second radio frequency circuit, the third reset circuit and the third programming interface constitute the router module, the second single-chip microcomputer, the fourth programming interface, the relay drive circuit, the fourth power supply circuit, UART/ The RS485 conversion circuit, the fourth crystal oscillator, the speaker drive circuit and the fourth reset circuit constitute the second single-chip microcomputer module;

The LED display is connected to the UART/RS485 conversion circuit through the RS485 bus 2, and the speaker is connected to the speaker drive circuit.

The relay drive circuit is connected to the relay coil, one end of the relay has a 220VAC plug, and the 220VAC plug is assembled with the socket of the 220VAC power supply, so that the relay is connected to the 220VAC power supply, and the other end of the relay has a 220VAC jack, which is connected to the shielding instrument. The plugs are assembled together so that the relay is connected to the shielding instrument; the relay and the shielding instrument constitute the shielding instrument control module.

The computer is equipped with Windows operating system and test management software, and it is connected to the USB/UART chip through the USB interface.

The USB/UART chip is connected to the first microcontroller.

Both the first programming interface and the fourth programming interface are JTAG interfaces;

The frequencies of the first crystal oscillator and the fourth crystal oscillator are both 8MHz;

The frequencies of the second crystal oscillator and the third crystal oscillator are both 32MHz;

The models of the first single-chip microcomputer and the second single-chip microcomputer are both MSP430F149.

The time management and distribution equipment is installed in the test center, and the receiving terminals of the 1st test room to the nth test room are respectively installed in the 1st test room to the nth test room.

The LED display is used to display the time, and the LED display includes a driver chip and an LED dot matrix screen.

Working process of the present invention is as follows:

Time management and delivery The equipment sends time, voice and other information to the receiving terminals in each examination room, and each receiving terminal in the examination room performs actions such as display and playback after processing.

The test management software developed by Visual Studio 2010 is running on the computer. The test management software can set the test time in stages (such as the time for issuing papers, the start time of the listening test, the end time of the listening test, the time for receiving answer cards 1, and the time for receiving answer cards 2 Time, test end time, etc.), set the voice prompt information according to the time, and set the opening and closing of the shielding device according to the time. The test management software can accept the setting information of the staff and send the USB/UART chip through the USB interface. The USB/UART chip converts the signal sent by the USB interface of the computer into a TTL signal and sends it to UART0 of the first single-chip microcomputer.

The first single-chip microcomputer receives various instructions issued by the computer, and after processing, sends them to the first CC2530 chip through UART1; the first programming interface provides a programming and debugging interface for the first single-chip microcomputer; the first power supply circuit connects the external 5V power supply (from to USB) into 3.3V to power the first microcontroller. The first crystal oscillator provides an 8MHz clock signal for the first single-chip microcomputer; on the one hand, the first reset circuit provides the function of power-on reset operation for the first single-chip microcomputer, and on the other hand provides the user with the function of manually resetting the first single-chip microcomputer. When the system is abnormal, the system can be restored to normal by resetting.

The first CC2530 chip supports the ZigBeePRO protocol, and it is set as the ZigBee coordinator through the development of the protocol stack. The second crystal oscillator provides a 32MHz clock signal for the first CC2530 chip; the second power supply circuit converts the 5V power supply (from USB) to 3.3V to supply power for the first CC2530 chip; the first radio frequency circuit is responsible for modulating the first CC2530 chip The 2.4GHz signal is emitted outward. On the one hand, the second reset circuit provides the power-on reset operation function for the first CC2530 chip, and on the other hand, it provides the user with the function of manual reset operation for the first CC2530 chip, and the user can reset the system to return to normal when the system is abnormal; The second programming interface provides a programming and debugging interface for the second CC2530 chip.

The coordinator module is responsible for the establishment of the entire wireless network, and broadcasts information such as time and voice received by the UART interface. For various exams, the staff opens the exam management software and sets the settings on the software interface, including the start time of the test, the start time of listening, the time of receiving answer cards, the time of collecting papers, etc., and set the corresponding voice prompts at each time point Information, the voice prompt information can be a pre-recorded voice file.

The coordinator module has a power amplification circuit, which adjusts the power of the wireless transmission signal to about 46dbm, and sends the data to the receiving terminals of each examination room through broadcasting.

The receiving terminal of each examination room is composed of a router module and a second single-chip microcomputer module. The second CC2530 chip receives the test time and voice information issued by the time management and distribution equipment, and sends them to UART0 of the second single-chip microcomputer, so that the second single-chip microcomputer can process these data. to process. After the second single-chip computer processes the data, it sends the corresponding time information to the LED display screen for display, sends the corresponding voice information to the speaker to generate a prompt voice, and sends the shielding device switch information to the relay to control the opening and stopping of the shielding device .

The second CC2530 chip supports the ZigBeePRO protocol stack, and it is set as a ZigBee router by setting and developing the protocol stack accordingly.

The router module can join the ZigBee network established by the coordinator module, and has a routing function, which can increase the coverage of the network. The router module is connected to the second single-chip microcomputer module through the UART interface; the third crystal oscillator provides a 32MHz clock signal for the second CC2530 chip; the third power supply circuit converts 220V ordinary AC power to 3.3V to supply power for the second CC2530 chip; the second radio frequency circuit Send out the 2.4GHz signal modulated by the second CC2530 chip; on the one hand, the third reset circuit provides the power-on reset operation function for the second CC2530 chip, and on the other hand, provides the user with the function of manual reset operation for the second CC2530 chip , the user can restore the system to normal by resetting when the system is abnormal; the third programming interface provides a programming and debugging interface for the second CC2530 chip.

The second single-chip microcomputer module is composed of a MSP430F149 single-chip microcomputer and corresponding peripheral circuits. The router module sends the received time and voice information to the second single-chip microcomputer through UART for processing, and the second single-chip microcomputer sends the corresponding data to the LED display after data processing. screen and speakers. The fourth programming interface provides a programming and debugging interface for the second single-chip microcomputer; the relay drive circuit drives the relay to work according to the switching signal generated by the second single-chip microcomputer; the fourth power supply circuit converts the 220V ordinary AC power supply to 3.3V to supply power for the second single-chip microcomputer ; The UART/RS485 conversion circuit converts the UART signal of the single-chip microcomputer into an RS485 signal and provides it to the LED display; the fourth crystal oscillator provides an 8MHz clock signal for the second single-chip microcomputer; The power of the signal is amplified to drive the speaker to work; on the one hand, the fourth reset circuit provides the power-on reset operation function for the second single-chip microcomputer, and on the other hand provides the user with the function of manual reset operation for the second single-chip microcomputer, and the user can pass through when the system is abnormal. Reset returns the system to normal.

The LED display screen is used to display the time, and the speaker sends out some voice prompt information (according to the requirements of the management center) for the reference of the invigilators; the speaker signal is generated by the D/A converter of the second single-chip microcomputer, and is provided after the power is amplified by the speaker drive circuit to the speakers.

The second single-chip microcomputer controls the power supply of the shielding instrument to be in the on or off state through the relay, thereby making it work or stop. The shielding instrument can work or stop according to the specified time.

Claims (7)

1. a novel intelligent examination hall management system, is characterized in that, its structure is as follows: time management with issue equipment and be connected respectively the 1st receiving terminal to the n examination hall, examination hall receiving terminal by ZigBee/IEEE802.15.4 channel (1); N >=1;

Time management is as follows with the structure that issues equipment: computing machine is connected USB/UART chip, the first single-chip microcomputer connects respectively USB/UART chip, a CC2530 chip, the first DLL (dynamic link library), the first feed circuit, the first reset circuit and the first crystal oscillator, and a CC2530 chip connects respectively the second crystal oscillator, the second feed circuit, the first radio circuit, the second reset circuit and the second DLL (dynamic link library); The first single-chip microcomputer, USB/UART chip, the first DLL (dynamic link library), the first feed circuit, the first reset circuit and the first crystal oscillator form the first one-chip computer module; The one CC2530 chip, the second crystal oscillator, the second feed circuit, the first radio circuit, the second reset circuit and the second DLL (dynamic link library) form coordinator module;

The structure of the 1st receiving terminal to the n examination hall, examination hall receiving terminal with same structure is as follows: the 2nd CC2530 chip connects respectively the 3rd crystal oscillator, the 3rd feed circuit, the second radio circuit, the 3rd reset circuit and the 3rd DLL (dynamic link library); Second singlechip connects respectively the 2nd CC2530 chip, the 4th DLL (dynamic link library), relay drive circuit, the 4th feed circuit, UART/RS485 change-over circuit, the 4th crystal oscillator, loudspeaker driving circuit and the 4th reset circuit; The 2nd CC2530 chip, the 3rd crystal oscillator, the 3rd feed circuit, the second radio circuit, the 3rd reset circuit and the 3rd DLL (dynamic link library) form router-module, and second singlechip, the 4th DLL (dynamic link library), relay drive circuit, the 4th feed circuit, UART/RS485 change-over circuit, the 4th crystal oscillator, loudspeaker driving circuit and the 4th reset circuit form second singlechip module;

LED display connects UART/RS485 change-over circuit by RS485 bus (2), and loudspeaker connects loudspeaker driving circuit.

2. a kind of novel intelligent according to claim 1 examination hall management system, it is characterized in that, described relay drive circuit connects relay, one end of relay has 220VAC plug, the socket of this 220VAC plug and 220VAC power supply is assembled together, thereby relay is connected with 220VAC power supply, and the other end of relay has 220VAC jack, this 220VAC jack is assembled together with the plug of shielding instrument, thereby relay connects shielding instrument; Relay and shielding instrument form shielding instrument control module.

3. a kind of novel intelligent according to claim 1 examination hall management system, is characterized in that, described computing machine is equipped with Windows operating system and examination management software, and it connects USB/UART chip by USB interface.

4. a kind of novel intelligent according to claim 1 examination hall management system, is characterized in that, described USB/UART chip is connected to the UART0 of the first single-chip microcomputer.

5. a kind of novel intelligent according to claim 1 examination hall management system, is characterized in that, described the first DLL (dynamic link library) and the 4th DLL (dynamic link library) are jtag interface;

The frequency of described the first crystal oscillator and the 4th crystal oscillator is 8MHz;

The frequency of described the second crystal oscillator and the 3rd crystal oscillator is 32MHz;

The model of described the first single-chip microcomputer and second singlechip is MSP430F149.

6. a kind of novel intelligent according to claim 1 examination hall management system, is characterized in that, described time management with issue equipment and be arranged on examination point administrative center, the 1st receiving terminal to the n examination hall, examination hall receiving terminal is arranged on respectively the 1st n examination hall, examination hall to the.

7. a kind of novel intelligent according to claim 1 examination hall management system, is characterized in that, described LED display comprises driving chip and LED dot matrix screen.

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