Digital Tube Research Articles

The Research and Design of a New Electronic Communication Counter for Sensors

With the development of Internet of Things, in addition to the basic counting function, the counter also needs to integrate more functions to meet the application requirements, such as display, communication, charging functions and other functions. Therefore, it is very necessary to design a new electronic counter which has an ability to communicate with outside, display counting information and energy supplement. In this paper, we design a new electronic counter based on the pulse counting theory, information communication theory and flash memory technology. First of all, we will count the pulse signal through the signal input circuit and the signal processing circuit into the control circuit, which can identify the digital pulse signal. Secondly, the control circuit count the number of digital pulse signal, the count number will be real-time displayed on the digital tube. Meanwhile, the counter communicates with the Bluetooth device (smartphone, pad, etc.) via the Bluetooth module. And users can use the Bluetooth device to configure the counter's operating parameters, clear or pre-count values, view the counter operating conditions and historical data.

一体化的白光数码管封装技术

一体化的白光数码管封装技术

The Design of Intelligent Responder Based on SCM

Eight channel wireless intelligent responder has been designed based on 51 SCM, and the button switch and the microcontroller I/O are used as the input and output, the digital tube and the I/O are used as display function. The software is programmed with C language, which is simple and easy to understand and very intuitive, at the same time, the whole design is simple and practical. After testing, the system can realize the eight channel responder function and can be conveniently applied to the game.

Weighing System Design Based on Single Chip Microcomputer

As the living standards of people improve continually, commercial behavior is becoming more and more modernized, people also put forward new requirements for the speed and accuracy of goods measurement. This paper designs a weighing system of digital electronic scale which is similar to the MCU simulation, and gives the design diagram, hardware composition and software system. This system takes the 51 single chip microcomputer as the core, the main components are the dedicated 24 bits serial A/D conversion chip HX711, cantilever type resistance strain sensor, the four digital tube display. This design uses the dedicated 24 bits serial A/D conversion chip HX711, which has high resolution, simple peripheral interface, and occupies less I/O port, etc.

Design and Implementation of Digital Frequency Meter Based on SCM

The digital frequency meter was a device to detect and display the frequency. In many design complexity, features a variety of electronic devices, the digital frequency meter was one of the essential equipment. It was widely used in various fields. The core of the frequency meter is AT89C51 microcontroller. It used SCM counting and timing functions to achieve the measurement pulse within a certain gate time, and it uses LED digital display tube displays the measured frequency. The device has a high frequency accuracy measurement, real time, and it has a simple, easy to carry, strong expansion capability, a wide range.

Motor Speed Detection Based on Single Chip Microcomputer and Waveform Recording System Design

this article is to use AT89C51 single-chip microcomputer control of intelligent speed measuring instrument. Motor in the process of operation, need to be monitored, speed is a necessary one parameter. This system is carried out on the motor speed measurement, and can be conducted and PC communication, shows that the speed of the motor, and observe the basic condition of the motor running. Mainly USES AT89C51 as the control core, by hall sensors, LED digital tube, the NE555, L298N, operational amplifiers, etc. SCM measuring speed system was introduced in detail. Give full play to the performance of the single chip microcomputer. The focus is on measuring speed and display. Its advantage is hardware circuit is simple, software function is perfect, measuring speed, high precision, reliable control system, the characteristics of high performance-to-price ratio.

Design of a Digital Breathing Rate Tester Circuit

Digital breathing rate tester uses amplifier circuit, filter circuit, shaping circuit, and frequency quadruplicator circuit to process respiration signals. The signals processed are mixed with signals from logic controller circuit, pass the NAND gate, combine with signals from NAND gate and enter the pulse counter circuit. Pulse counter circuit’s digital tube shows the breathing rates.

Study on the Technology of Digital Recognition in Verification Process of Mechanical and Electronic Anemometer

In order to solve the key technical problem in the verification process of mechanical and electrical coal mine anemometer, the paper presents digital recognition approach base on the characters of the anemometer image. First of all, collect the mirror images of the anemometer from a plain mirror which in the wind tunnels. And then we process the mirror images with secondary mirroring, grayscaling, denoising and binarization. Followed the location of the digital area can be determined and the incline distortion of the image can be adjusted. The final step is segmenting the single character in the digital character region and identify the corresponding number base on the characteristics of anemometer, which using the LED digital tube to display numbers. The experiments show that this method can accurately identify the numbers on the anemometer and has high recognition rate. The recognition time is able to meet the requirement for the verification of anemometer. Thus the method has high practical value.

Attendance Machine for Teaching

On the basis of analysis of the named,Introduces the development of teaching process of roll machine, roll machine for teaching digital tube display random results, intuitive and clear, and good use effect.

Design of Multi-Function Keyboard Display Controller Based on FPGA

The multi-function keyboard display controller can complete lots of job, which contain direct keyboard, matrix keyboard, LED digital tube dynamic scanning. The controller including button identification, automatic continuous functions and LED digital tube display , flashing and controlling the decimal point. At the same time, the external interface of the controller using the routine UART interface, established a perfect communication protocol. So that we can realize the access keys and control the display of LED digital tube. The multi-function keyboard display controller not only can overcome the disadvantages that traditional microcontroller system take more of the I/O lines and system resource, but also can use the mainstream Field-Programmable Gate Array completes system functions.

The Development of UC/OS Application System Based on Embedded System

To solve the effect that the multi threading task can be achieved by the TFT of color screen, we adopt MSP430F5438 as the main controller, the main equipment of its hardware system was built by the TFT of touch screen, and the task driving function was completed by using buttons and wireless communication module and other peripherals. And we have developed the application program based on UC/OS operating system utility with the kernel structure and characteristics of UC/OS. It can be realized these function, such as digital tube display, TFT display task, multi-tasking, wireless communication, the task driving system, touch screen and low power verification task. The experimental results show that it completely meets the desired design goals, it works reliable and stable.

Design of Illumination Intensity Measure Instrument

Photoelectric detection technology is a kind of new technology of non-contact measurement in terms of the modern photoelectric devices such as laser, infrared ray and optical cable. Through the detecting on the radiation with the information of the detecting objects and extracting the useful information by the input circuits, inputting LED from the A/D interface, and then the parameters such as geometric quantity or physical quantity are displayed. The design of illumination intensity measure instrument is based on photoelectric detection technology. It receives the incident light through the photodiode and converts the light energy into electrical energy. Have been filtered and amplified, the current is converted into digital value by the ICL7106 A/D converter, and the accurate data is displayed on the LED digital tube. So the data is the value of Illumination intensity at the moment.

Network Monitoring System of Multipoint Temperature Collection and Control

The temperature monitoring control is the most basic data parameters of the daily life and industrial production; it also has very important significance in multi-point temperature collection, accurate measurement and control monitoring. Therefore, this paper was based on SCM to deal with the temperature information data, design the multipoint temperature monitoring system, design the function of multipoint temperature collection and control network monitor system and main program, subroutine and so on. At the same time, this paper expounded the design methods of temperature acquisition, calculation and display. It used the thermistor temperature sensor to measure real-time temperature of the periphery environment, and voltage change that transformed from the measured temperature was transmitted to ADE0708 converter for modulus conversion, and the number was input to the serial interface and dealt with computer software to output conversion by SCM, digital tube was displayed in digital sections, it was the real-time temperature value. According to the converter channel port it could set output driving control signal, the display light had status indication and adjustment and control.

Research and Implementation of Positioning System Based on Ultrasonic

This paper presents an ultrasonic ranging system based on 52 single chip microcomputer. The hardware circuit of the system includ the microcontroller circuit, display circuit, power supply circuit, etc.. The system measures datas by ultrasonic module, then the The measurement results are processed and calculated, and finally showed the actual distance on the digital tube. The system is reliable, the ranging function whith non-contact can realized by ultrasonic.

Design of Servo Control System for Stepper Motor Based on MCU and Infrared Remote Control

A four-phase stepper motor servo control system is designed by a master chip STC89C52 and driver chip ULN2003A. Operation in four modes of stepper motor is achieved by keys. Speed control of stepper motor is achieved by A/D conversion chip TLC1549 and adjustable potentiometer. Dynamic display circuit of digital tube is designed by a shift register 74LS164. At the same time, operating in four modes, speed control and turning its particular angle of stepper motor are achieved by the infrared receiver HS0038. The experimental result shows that the control system is reliable, and it has some practical value.

Design of Intelligent Actuation Time Measurement for Low Voltage Electrical Apparatus

In order to measure the actuation time of low voltage electrical apparatus, this paper designs an intelligent timing device triggered by single and double circuits. The device adopts the system structure of the upper and lower computer so that the action signals will be collected and measured by lower computer through conditioning, and the measurement results will be shown on the digital tube. Through communication with lower computer by RS232 serial port, the upper computer can display the real-time status and results of the measurement and issue commands to control the operation of the device. Utilizing modular programming, and targeted for the action characteristics of different components, this paper puts forward adaptive optimization testing algorithm, which can achieve single / double circuit timing, digital display, upper computer monitoring, manual / programmed control, the positive and negative transition trigger of the adaptive input signal and other functions. After the tests on actual functionality and reliability, the device is successfully applied in aircraft power supply system. The results suggest that the function of the timing device is complete, its structure is simple, easy to maintain, and it can meet the measurement requirements of the actuation time for low voltage electrical components.

Freescale Microcontroller Minimum System and Peripheral Modules Design

A wide variety of current embedded microcontrollers like 8,16 and 32-bit of Freescale Micro Control Unit(MCU) performance is stable and various. Mc9s12xs128 is a kind of Freescale 16-bit microcontroller. The concept of the Freescale Microcontroller Minimum System and the principle of realization is systematically elaborated. Many peripheral module such as Serial Communication, Liquid Crystal Display(LCD), keyboard scanning and Digital Tube Display are developed after a thorough understanding of the basic theory of Minimum System. In addition to this work, a very detailed description of each module's hardware design and software programming methodology is also made to show that an embedded system can achieve a specific function.

The System Design of Wireless Basketball Timer Based on MCU and NRF24L01

Currently, Basketball players must know the progress well in time in the game, the presence of electronic timer with LED display influences the basketball games. The wired operation influences the control distance, control reliability, control efficiency and so on. So how to make it longer, anti-interference, easy operation and high efficiency is a difficult problem. A kind of wireless basketball timer is designed based on micro-computer unit (MCU) and wireless nRF24L01 module to compensate for the existing disadvantages, which has LED digital tube of large size for the section number display and middle size for game display and 24s display. The user is easy to carry and control the timer wirelessly at any place in the basketball court using the sending control device. The test results show that the system, easy to control and stable to operate, is reliable to transmit the wireless data.

Manufacture of Online Analyzer of Water in Oil

Hardware and software design of high-precision real-time analyzer of water in oil that focuses on AT89C52 SCM is introduced. ICL7135A / D conversion is applied to realize high-precision data acquisition in the analog signal acquisition channels, method of true and false load is adopted to inhibit the interference signal in data acquisition department and data transmission channel, and the stability of data is improved through the operation of software. Digital tube is applied to display the measured value, an alarm signal would be sent out if the value exceeds the set value, and at the same time the control signal of the start of oil-water separation equipment would be given. The analyzer is constituted by SCM, shortwave emitter, data processing section, result display and some other components, the system structure is simple and reliable, and the measuring accuracy is high.

Study on the Temperature and Speed Test System

A kind of multiple parameter data acquisition system was designed based on single-chip microcomputer which can realized the data acquisition of temperature and DC motor speed. The data acquisition system consists of sensor, signal processing circuit, single-chip microcomputer and LED digital tube. The speed signal is acquired by photoelectric sensor, put into the Single-chip microcomputer processed after processed by signal processing circuit, and displayed the value in the digital tubes. The temperature signal is acquired by digital sensor, and the Single-chip microcomputer can read the data directly. Through two independent keyboards, the test system realized the data acquisition and data switch displaying of the multiple parameters.