CN110958322B - Wireless communication system for implementing attendance based on two-dimensional code scanning - Google Patents

Wireless communication system for implementing attendance based on two-dimensional code scanning Download PDF

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CN110958322B
CN110958322B CN201911256091.4A CN201911256091A CN110958322B CN 110958322 B CN110958322 B CN 110958322B CN 201911256091 A CN201911256091 A CN 201911256091A CN 110958322 B CN110958322 B CN 110958322B
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attendance
terminal
information
cloud server
smart phone
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CN110958322A (en
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吴睿涵
姜有超
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Beijing Jiaotong University
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/14—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
    • G06K7/1404—Methods for optical code recognition
    • G06K7/1408—Methods for optical code recognition the method being specifically adapted for the type of code
    • G06K7/1417—2D bar codes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
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    • G06Q10/109—Time management, e.g. calendars, reminders, meetings or time accounting
    • G06Q10/1091—Recording time for administrative or management purposes
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C1/00—Registering, indicating or recording the time of events or elapsed time, e.g. time-recorders for work people
    • G07C1/10—Registering, indicating or recording the time of events or elapsed time, e.g. time-recorders for work people together with the recording, indicating or registering of other data, e.g. of signs of identity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network

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Abstract

The invention discloses a wireless communication system for implementing attendance based on two-dimensional code scanning, which comprises an attendance terminal, a smart phone and a cloud server, wherein the smart phone is connected with the attendance terminal; the attendance checking terminal and the smart phone are both in communication connection with the cloud server, and the attendance checking terminal or the smart phone is connected with the cloud server through 4G or 5G or wifi; the cloud server controls the attendance terminal to display a two-dimensional code on a display screen of the attendance terminal, the two-dimensional code is refreshed every T time, and T is 2-5 seconds; the attendance checking terminal is used for displaying the two-dimensional code; the cloud server is used for sending the two-dimensional code serial number to the attendance terminal, receiving and processing attendance information from the smart phone and transmitting an attendance result message to the smart phone. The wireless communication system for implementing attendance based on two-dimensional code scanning is easy to implement and can realize quick and accurate attendance.

Description

Wireless communication system for implementing attendance based on two-dimensional code scanning
Technical Field
The invention relates to a wireless communication system for implementing attendance checking based on two-dimensional code scanning.
Background
The existing attendance system has two main flows:
(1) location-based card punching software
Punching cards such as enterprise WeChat and nail attendance; checking the attendance in a certain area range if the card is punched; the card punching has larger error, and if the card punching does not arrive at a unit, attendance checking can be realized.
(2) Card punching based on biological characteristics such as fingerprints
Fingerprint card punching or face recognition card punching is carried out at an entrance, the requirement on attendance equipment is high when the attendance equipment is opened, and the problem that fingerprint recognition is insensitive exists in some equipment.
Therefore, there is a need for a new attendance system and a new wireless communication system.
Disclosure of Invention
The invention aims to solve the technical problem of providing a wireless communication system for implementing attendance checking based on two-dimensional code scanning, and the wireless communication system can realize quick and accurate attendance checking.
The technical solution of the invention is as follows:
a wireless communication system for implementing attendance based on two-dimensional code scanning comprises an attendance terminal, a smart phone and a cloud server; the attendance checking terminal and the smart phone are both in communication connection with the cloud server, and the attendance checking terminal or the smart phone is connected with the cloud server through 4G or 5G or wifi;
the cloud server controls the attendance terminal to display a two-dimensional code on a display screen of the attendance terminal, the two-dimensional code is refreshed every T time, and T is 2-5 seconds;
the attendance checking terminal is used for displaying the two-dimensional code; the information (or the mapped information, or the contained information, or the information obtained after scanning the two-dimensional code) corresponding to the two-dimensional code is the information of the previous attendance, and contains the ID number (namely the code) of the attendance unit, the current attendance type and the serial number of the current two-dimensional code;
the smart phone is used for scanning the two-dimensional code to obtain attendance front-stage information, uploading the attendance information to the cloud server and receiving attendance result information from the cloud server; the attendance information comprises attendance front-stage information and attendance back-stage information, wherein the attendance back-stage information comprises the mobile phone number of the mobile phone, the current position of the smart phone and the current time (which can be the time of completing scanning or the time of sending a message);
the cloud server is used for sending the two-dimensional code serial number to the attendance terminal, receiving and processing attendance information from the smart phone and transmitting an attendance result message to the smart phone.
The attendance result messages are collected uniformly and sent to a preset intelligent mobile phone end or a preset mailbox of an administrator (such as a mobile phone or a mailbox of a general manager or a personnel supervisor).
The attendance result message comprises an attendance normal message, an attendance late message or an attendance unqualified message.
Operation of the cloud server side: and comparing time, comparing positions, comparing serial numbers of the two-dimensional codes, and obtaining an attendance checking result { sending an attendance checking normal message, an attendance checking late arrival message or an attendance checking unqualified message according to the condition }.
The attendance terminal comprises a base (1), a left-right inclination adjusting platform (2) and a display (3);
when in use, the base is fixed on the wall surface in the vertical direction and is attached to the vertical wall surface through screws or adhesive;
2 support rods (4) and a first electric push rod (6) are arranged between the base and the left-right inclination adjusting platform; 2 of the support rods are arranged on one side (such as the right side), and the first electric push rod is arranged on the opposite side (such as the left side), so that the left and right inclined platforms can be driven to incline in the left and right directions when the electric push rods act;
the left and right inclined platforms are connected with the display through a hinge part with a rotating shaft (11), and the rotating shaft is horizontally arranged; enabling the display to rotate (i.e., tilt) about the axis of rotation relative to the tilt-right platform; a second electric push rod is arranged between the left and right inclined platforms and the display and is positioned above the connecting part; therefore, when the second electric push rod extends, the lower end of the display screen is closer to the wall surface, namely the elevation angle is reduced, and the depression angle is increased;
the display screen is used for displaying the two-dimensional code or the notification information.
Two sides and the upper end part of the display screen are provided with light shields;
the top and two sides of the light shield are provided with light intensity sensors for detecting which side has stronger light intensity, and if the light intensity on the left side is greater than that on the right side, the MCU on the attendance terminal controls the left and right inclined platforms to rotate towards the right side;
the light intensity sensor at the front end of the top of the light shield is provided with 3 light intensity detection units, one of the light intensity detection units is arranged in the horizontal direction, the second light intensity detection unit is arranged at an elevation angle of 15 degrees with the horizontal plane, and the third light intensity detection unit is arranged at a depression angle of 15 degrees with the horizontal plane.
The system also comprises a standby terminal for standby attendance, wherein the standby terminal is in communication connection with the cloud server;
the standby terminal (also called standby attendance terminal) comprises a bottom plate and a luminous seat;
the bottom plate is provided with a light-emitting seat, the light-emitting seat is provided with a display screen, and the bottom plate is also provided with a first key, a second key and a power switch; a CPU and a communication module are integrated in the light-emitting seat, and the communication module is used for being in communication connection with a cloud server;
the standby terminal is connected with the cloud server, and the cloud processor sends attendance terminal information to the standby terminal; the attendance terminal information comprises a code of the unit, a current attendance type (such as working or working), attendance position information and attendance terminal time; the time of the attendance checking terminal is updated once every t time;
the standby terminal converts the attendance terminal information into circulating coded optical information to be circularly displayed on a display screen; the smart phone aims the light pulse detection unit at a display screen of the standby terminal;
the optical pulse detection unit is a camera or other detection units, can acquire an information code based on the change of light intensity, and can acquire the attendance terminal information by decoding the information code according to a preset rule; after the attendance terminal information is acquired, the mobile phone number of the mobile phone, the current time of the smart phone, the attendance terminal time and the current position information of the mobile phone are sent to the cloud server through the APP, the cloud server verifies the information and returns attendance result information to the smart phone (for specific comparison, the cloud server processes the attendance information).
An attendance checking method based on wireless communication and two-dimensional codes comprises the following steps:
step 1: displaying the two-dimensional code on the attendance checking terminal;
the attendance terminal is communicated with the cloud server, and the cloud server sends attendance front-stage information to the attendance terminal, wherein the attendance front-stage information comprises attendance unit ID, two-dimensional code number and current attendance type (representing work attendance or work attendance off); updating the two-dimension code at regular time;
step 2: the smart phone scans the two-dimensional code and uploads attendance information to the cloud server;
the smart phone scans the two-dimensional code to obtain attendance front-stage information, and then combines the attendance front-stage information and the attendance rear-stage information into attendance information which is uploaded to the cloud server; the attendance checking back-end information comprises the number of the mobile phone, the current position of the smart phone and the current time;
and step 3: the cloud server processes the attendance information and returns an attendance result;
after receiving the attendance information, the cloud server analyzes the attendance information to form an attendance result, and returns the attendance result to the smart phone.
The attendance result messages are collected uniformly and sent to a preset intelligent mobile phone end or a preset mailbox of an administrator (such as a mobile phone or a mailbox of a general manager or a personnel supervisor).
Operation of the cloud server side: and comparing time and positions, comparing the serial numbers of the two-dimensional codes, and judging the attendance result { sending an attendance normal message, an attendance late arrival message or an attendance unqualified message according to the condition }.
The attendance terminal comprises a base (1) and a display (3); a left-right tilting mechanism and a pitching mechanism are arranged between the base and the display, a plurality of light intensity sensors are arranged on the attendance terminal, and the attendance terminal is provided with a wireless communication module for receiving remote control signals; the attendance checking terminal controls the left-right inclination and pitching of the display based on manual remote control of a user; or the attendance checking terminal automatically controls the left-right inclination and the pitching of the display based on the light intensity detection of the light intensity sensor.
Performing standby attendance on the basis of a standby terminal;
the standby terminal displays the two-dimensional code or an interface with the circularly appearing light pulse, the smart phone scans the two-dimensional code to acquire the information of the attendance front section for attendance checking, or the smart phone detects a light pulse signal through a light pulse detection unit to acquire the information of the attendance front section for attendance checking;
the standby terminal comprises a bottom plate and a light-emitting seat;
the bottom plate is provided with a light-emitting seat, the light-emitting seat is provided with a display screen, and the bottom plate is also provided with a first key, a second key and a power switch; a CPU and a communication module are integrated in the light-emitting seat, and the communication module is used for being in communication connection with a cloud server;
the standby terminal is connected with the cloud server, and the cloud processor sends attendance terminal information to the standby terminal; the attendance terminal information comprises the code of the unit, the current attendance type such as attendance or off duty, attendance position information and attendance terminal time; the time of the attendance checking terminal is updated every t time.
The standby terminal converts the attendance terminal information into circulating coded optical information to be circularly displayed on a display screen; the smart phone aims the light pulse detection unit at a display screen of the standby terminal;
the optical pulse detection unit is a camera or other detection units, can acquire an information code based on the change of light intensity, and can acquire the attendance terminal information by decoding the information code according to a preset rule; after the attendance terminal information is acquired, the mobile phone number of the mobile phone, the current time of the smart phone, the attendance terminal time and the current position information of the mobile phone are sent to the cloud server through the APP, the cloud server verifies the information and returns attendance result information to the smart phone.
The standby terminal is used independently when the attendance checking terminal breaks down.
The standby terminal and the attendance checking terminal are used simultaneously to increase attendance checking efficiency.
Has the advantages that:
the invention provides a wireless communication system for implementing attendance checking based on two-dimensional code scanning, which has the following advantages:
1. the cloud computing attendance system has an organization ID field, cloud computing attendance is achieved, enterprises share a cloud server, server resources are saved, and social resources are saved.
According to the invention, the organization ID field is added in the attendance record, so that a plurality of companies can use the same attendance server to realize cloud attendance. The prior art mainly focuses on a single factory attendance technology, does not have a cloud attendance technology, and the cloud technology is not mature at the moment, and the key field of the database of cloud computing is to add the enterprise organization id field.
2. In the verification process, the dynamic two-dimensional code is adopted for time verification, so that cheating is avoided.
3. By adopting the invention, a two-dimensional code generating end is downloaded without special hardware, and the mobile phone or the micro signal qq number can be online after verification; the attendance checking personnel can directly scan by WeChat, the attendance checking is successful, the attendance checking personnel can also be used all the time after scanning and automatic downloading, and the attendance checking personnel do not need to download again after changing companies. The mobile attendance checking of workers is very convenient.
Attendance personnel data are not required to be recorded by an attendance company; attendance data can be inquired in real time globally; providing efficient data interfaces for various erp software companies;
in conclusion, the wireless communication system of the invention has the advantages of easy implementation, high reliability, convenient use and social resource saving.
Drawings
FIG. 1 is a block diagram of the overall architecture of the system;
fig. 2 is a schematic structural view of an attendance checking terminal;
FIG. 3 is a schematic diagram showing the positional relationship between the display, the light shield and the light intensity sensor;
FIG. 4 is a back layout diagram of the 3 gimbal left-right tilt adjusting platform;
FIG. 5 is a schematic view of a light intensity sensor on top of a light shield;
fig. 6 is a schematic front view of the standby terminal;
fig. 7 is a side view of a backup terminal;
fig. 8 is a schematic diagram of a dimming circuit.
Description of reference numerals: 1-a base, 2-a left-right inclination adjusting platform and 3-a display; 4-a support rod, 5-a universal joint, 6-a first electric push rod, 7-a second electric push rod, 8-a light intensity sensor, 9-a light shield and 10-a hinge component; 101-a rotating shaft; 51-first gimbal, 52-second gimbal, 53-third gimbal; 81-light intensity detecting unit.
11-a bottom plate, 12-a light-emitting seat, 13-a first key, 14-a second key, 15-a power switch and 16-a display screen;
Detailed Description
The invention will be described in further detail below with reference to the following figures and specific examples:
example 1: a first part: attendance system
Firstly, the system is formed:
the attendance checking system comprises an attendance checking terminal, a smart phone and a cloud server; the attendance checking terminal and the smart phone are both in communication connection with the cloud server, and the attendance checking terminal or the smart phone is connected with the cloud server through 4G or 5G or wifi;
the cloud server controls the attendance terminal to display a two-dimensional code on a display screen of the attendance terminal, the two-dimensional code is refreshed every T time, and T is 2-5 seconds; the refreshing function is to prevent cheating, and one mode of the cheating is as follows: if a two-dimensional code image is shot and sent to others to carry out the attendance checking instead of scanning.
The attendance checking terminal is a smart phone or a tablet personal computer with an intelligent system;
second, attendance terminal and smart phone registration
(1) Registering an attendance terminal:
an attendance checking unit installs an APP on an intelligent terminal (a smart phone or a tablet personal computer), inputs a unit name and an address, and obtains a registration number; the attendance terminal can be an intelligent tablet computer.
After the attendance checking terminal registers, one or more personal accounts are selected as accounts (generally, a general manager or a personnel supervisor) which can receive and check attendance checking information of a unit, and the accounts are supervisor accounts.
(2) Personal registration:
the method for downloading the APP by the individual user comprises the steps of scanning a two-dimensional code on an attendance checking terminal, if the attendance checking APP is detected not to be installed on the mobile phone, obtaining a downloading address from a link contained in the scanned two-dimensional code, downloading the APP and installing the APP;
in the APP interface, a person inputs keywords or unit full names in unit names in a search box; finding the unit, proposing a registration application, wherein the mobile phone number of the mobile phone is the registration number, if a plurality of mobile phone numbers exist in the mobile phone, the user selects one mobile phone number as the registration number, if the unit is registered, the mobile phone number and the name are related, the name is displayed, otherwise, the user is prompted to input the name, and if necessary, the user actively inputs the job number. After the successful registration, the APP gives information of successful registration;
third, attendance process
The smart phone opens an attendance APP, and takes a picture of a two-dimensional code on a screen of an attendance terminal, wherein the two-dimensional code comprises a code of the unit, a current attendance type such as attendance or off duty, attendance position information and the serial number of the two-dimensional code; after the smart phone acquires information obtained by scanning, the phone number of the smart phone, the current time, the current two-dimensional code serial number and the current position information of the smart phone are sent to a cloud server through an APP, the cloud server verifies the new information and returns attendance result information to the smart phone;
the typical mode of the attendance success message is as follows: name (xxx), date (xx/xx/xx), arrival time (xx: xx minutes), attendance type (commuting or leaving work), normal or late to xx minutes.
Operation of the cloud server side: and comparing time, comparing position and comparing two-dimensional code serial numbers. Thereby avoiding cheating. Specifically, the method comprises the following steps:
(1) comparing time, namely comparing the attendance time uploaded by the smart phone with attendance standard time (such as set 8:30 working), wherein if the attendance time is earlier than the attendance standard time, the attendance time is not late, otherwise, if the attendance time exceeds the attendance standard time, the attendance time is late;
(2) comparing positions, namely comparing the current position uploaded by the smart phone with a position set by a unit, and if the error is greater than a set distance (such as 30m), considering that the attendance is in a problem;
(3) comparing two-dimensional code sequence numbers means: the two-dimensional code serial numbers are numbered in sequence, the two-dimensional codes are refreshed constantly at regular time, time delay of data uploading is considered, and each two-dimensional code corresponds to one refreshing time, so a certain margin is set, if the two-dimensional code serial number uploaded by the smart phone is n, time periods corresponding to n-1 and n +1 are t0-t1, if the attendance time uploaded by the smart phone is between t0-t1, the two-dimensional code serial numbers are matched, otherwise, the two-dimensional code serial numbers are not matched, and if the two-dimensional code serial numbers are not matched, attendance failure is prompted, and the user is prompted to scan the two-dimensional codes again.
And sending an attendance table or a statistical table.
After the attendance is finished, if 8 o 'clock and 30 min work, 9 o' clock starts to send the attendance table or the statistical table to the master account.
When the code is scanned, snapshot and video recording are carried out simultaneously, and when attendance time information is uploaded, a picture is uploaded simultaneously. As a spare. The attendance checking terminal is provided with a camera, an attendance checking image is sent to the cloud server, and the snapshot image is used as a proof or evidence of attendance checking.
A second part: attendance terminal
The attendance checking terminal comprises a base 1, a left-right inclination adjusting platform 2 and a display 3;
when in use, the base is fixed on the wall surface in the vertical direction and can be attached to the vertical wall surface through screws or adhesive;
2 support rods 4 and a first electric push rod 6 are arranged between the base and the left-right inclination adjusting platform; referring to fig. 2 and 4, 2 of the supporting rods are arranged on one side (e.g., right side) and the first electric push rod is arranged on the opposite side (e.g., left side), so that the left and right inclined platforms can be driven to incline in the left and right directions when the electric push rods act;
the left and right inclined platforms are connected with the display through a hinge part with a rotating shaft 11, and the rotating shaft is horizontally arranged; enabling the display to rotate about the swivel axis relative to the left and right tilting platforms; a second electric push rod is arranged between the left and right inclined platforms and the display and is positioned above the connecting part; therefore, when the second electric push rod extends, the lower end of the display screen is closer to the wall surface, namely the elevation angle is reduced, and the depression angle is increased;
the display screen is used for displaying the two-dimensional code or notification information and the like;
both sides and the upper end portion of display screen cover have the lens hood to avoid the strong light to shine on the display screen, influence the user and sweep the sign indicating number.
The top and two sides of the light shield are provided with light intensity sensors; the MCU on the attendance terminal controls the left and right inclined platforms to rotate towards the right side (towards the light-weak side) if the light intensity on the left side is greater than that on the right side;
referring to fig. 5, the light intensity sensor at the front end of the top of the light shield has 3 light intensity detecting units, one of which (denoted as a first detecting unit) is arranged in the horizontal direction, the second is arranged at an elevation angle of 15 degrees with the horizontal plane (denoted as a second detecting unit), and the third is arranged at a depression angle of 15 degrees with the horizontal plane (denoted as a third detecting unit); if the light intensity detected by the third detection unit is the weakest, the MCU controls the push rod of the electric push rod to extend, and the strong light in front is prevented from irradiating.
In addition, a power adapter is adopted as a lithium battery in the attendance checking terminal;
the photovoltaic panels are arranged on the two sides or the front side of the attendance checking terminal, the photovoltaic panels are charged by the lithium battery through the charging circuit, and then the solar energy can be used as a standby power supply to increase the reliability of the device.
Based on the light intensity sensor, the screen brightness can be further automatically adjusted, and the brightness is increased in a brighter environment.
The remote control device also comprises a remote controller which can manually control the rotation angle of the display screen.
Third part, standby terminal
The standby terminal has two-dimensional code display and optical communication functions.
Specifically, the standby terminal comprises a bottom plate and a light emitting seat;
the bottom plate is provided with a light-emitting seat, the light-emitting seat is provided with a display screen, and the bottom plate is also provided with a first key, a second key and a power switch; a CPU and a communication module are integrated in the light-emitting seat, and the communication module is used for being in communication connection with a cloud server;
the standby terminal is connected with the cloud server, and the cloud processor sends attendance terminal information to the standby terminal; the attendance terminal information comprises a code (unit ID) of the unit, the current attendance type such as attendance or off duty, attendance position information and attendance terminal time; the time of the attendance checking terminal is updated every t time. t is for example 2 seconds.
The standby terminal converts the attendance terminal information into circulating coded optical information to be circularly displayed on a display screen; the smart phone aims the light pulse detection unit at the display screen of the standby terminal. The specific encoding and decoding is a well-established technique in the prior art, such as based on specific start bit identifier and end bit identifier, etc., and the valid signal is intercepted from a series of signals, and is not expanded here.
The optical pulse detection unit is a camera or other detection units (such as a light intensity sensor), can acquire an information code based on the change of light intensity (the change of the light intensity is equivalent to a light intensity pulse), and can acquire the attendance terminal information by decoding the information code according to a preset rule; after the attendance terminal information is acquired, the mobile phone number of the mobile phone, the current time of the smart phone, the attendance terminal time and the current position information of the mobile phone are sent to the cloud server through the APP, the cloud server verifies the information, necessary comparison processing (such as comparison time and comparison position) is carried out, and attendance result information is returned to the smart phone. If the error between the attendance terminal time and the current time of the mobile phone is smaller than a preset value (such as less than 3 seconds) and is not in the normal work-on time (namely, the work-on before the work-on time and the work-off after the work-off time are represented), and the position information meets the condition (such as the distance from the preset position is not more than 50m), returning the attendance normal information to the smart phone.
The 2 keys are used for switching the display mode of the display screen, the optical pulse communication mode is realized by pressing the first key, the two-dimensional code mode is realized by pressing the second key, and the specific mode is the same as the mechanism of displaying the two-dimensional code by the attendance checking terminal.
Therefore, the standby terminal can play a role in supplementation and assistance, can be used as a two-dimensional code terminal to implement attendance checking, can also be used as an optical pulse terminal to implement attendance checking, and is good in flexibility.
As shown in fig. 8, the display panel and the display have a luminance adjusting circuit that adjusts the light emission luminance; the brightness adjusting circuit comprises an LED lamp string, a triode, a potentiometer Rx and an A/D converter; the triode is an NPN type triode; the knob switch is coaxially connected with the potentiometer Rx;
the potentiometer Rx and the first resistor R1 are connected in series to form a voltage division branch, one end of the voltage division branch is connected with the positive electrode Vcc of the power supply, and the other end of the voltage division branch is grounded; the connection point of the potentiometer Rx and the first resistor R1 is connected with the input end of the A/D converter; the output end of the A/D converter is connected with the data input port of the MCU;
the LED lamp string comprises a plurality of LED lamps which are connected in series; the anode of the LED lamp string is connected with the anode Vcc of the power supply; the negative electrode of the LED lamp string is connected with the C electrode of the triode, and the E electrode of the triode is grounded through a second resistor R2; the B pole of the triode is connected with the output end of the MCU. The power supply positive pole Vcc is 5V, and the A/D converter is an 8-bit serial output type converter.

Claims (1)

1. A wireless communication system for implementing attendance based on two-dimensional code scanning is characterized by comprising an attendance terminal, a smart phone and a cloud server; the attendance checking terminal and the smart phone are both in communication connection with the cloud server, and the attendance checking terminal or the smart phone is connected with the cloud server through 4G or 5G or wifi;
the cloud server controls the attendance terminal to display a two-dimensional code on a display screen of the attendance terminal, the two-dimensional code is refreshed every T time, and T is 2-5 seconds;
the attendance checking terminal is used for displaying the two-dimensional code; the information corresponding to the two-dimension code is attendance front-stage information which comprises an attendance unit ID number, a current attendance type and a current two-dimension code serial number;
the smart phone is used for scanning the two-dimensional code to obtain attendance front-stage information, uploading the attendance information to the cloud server and receiving attendance result information from the cloud server; the attendance information comprises attendance front-stage information and attendance rear-stage information, and the attendance rear-stage information comprises the mobile phone number of the mobile phone, the current position of the smart phone and the current time;
the cloud server is used for sending the two-dimensional code serial number to the attendance terminal, receiving and processing attendance information from the smart phone and transmitting an attendance result message to the smart phone;
the attendance result messages are collected in a unified mode and are sent to a preset intelligent mobile phone end or a preset mailbox of an administrator;
the attendance result message comprises an attendance normal message, an attendance late message or an attendance unqualified message;
operation of the cloud server side: comparing time, positions and serial numbers of the two-dimensional codes, and obtaining an attendance result through comparison;
the attendance checking terminal comprises a base (1), a left-right inclination adjusting platform (2) and a display (3);
when in use, the base is fixed on the wall surface in the vertical direction and is attached to the vertical wall surface through screws or adhesive;
2 support rods (4) and a first electric push rod (6) are arranged between the base and the left-right inclination adjusting platform; 2 support rods are arranged on one side, and the first electric push rod is arranged on the other opposite side, so that the left and right inclined platforms can be driven to incline in the left and right directions when the electric push rod acts;
the left and right inclined platforms are connected with the display through a hinge part with a rotating shaft (11), and the rotating shaft is horizontally arranged; enabling the display to rotate about the swivel axis relative to the left and right tilting platforms; a second electric push rod is arranged between the left and right inclined platforms and the display and is positioned above the connecting part; therefore, when the second electric push rod extends, the lower end of the display screen is closer to the wall surface, namely the elevation angle is reduced, and the depression angle is increased;
the display screen is used for displaying the two-dimensional code or the notification information;
two sides and the upper end part of the display screen are provided with light shields;
the top and two sides of the light shield are provided with light intensity sensors for detecting which side has stronger light intensity, and if the light intensity on the left side is greater than that on the right side, the MCU on the attendance terminal controls the left and right inclined platforms to rotate towards the right side;
the light intensity sensor at the front end of the top of the light shield is provided with 3 light intensity detection units, wherein one light intensity detection unit is arranged in the horizontal direction, the second light intensity detection unit is arranged at an elevation angle of 15 degrees with the horizontal plane, and the third light intensity detection unit is arranged at a depression angle of 15 degrees with the horizontal plane;
the system also comprises a standby terminal for standby attendance, wherein the standby terminal is in communication connection with the cloud server;
the standby terminal comprises a bottom plate and a light-emitting seat;
the bottom plate is provided with a light-emitting seat, the light-emitting seat is provided with a display screen, and the bottom plate is also provided with a first key, a second key and a power switch; a CPU and a communication module are integrated in the light-emitting seat, and the communication module is used for being in communication connection with a cloud server;
the standby terminal is connected with the cloud server, and the cloud processor sends attendance terminal information to the standby terminal; the attendance terminal information comprises the code of the unit, the current attendance type, attendance position information and attendance terminal time; the time of the attendance checking terminal is updated once every t time;
the standby terminal converts the attendance terminal information into circulating coded optical information to be circularly displayed on a display screen; the smart phone aims the light pulse detection unit at a display screen of the standby terminal;
the optical pulse detection unit is a camera or other detection units, can acquire an information code based on the change of light intensity, and can acquire the attendance terminal information by decoding the information code according to a preset rule; after the attendance terminal information is acquired, the mobile phone number of the mobile phone, the current time of the smart phone, the attendance terminal time and the current position information of the mobile phone are sent to the cloud server through the APP, the cloud server verifies the information and returns attendance result information to the smart phone.
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