Based on one-chip computer data acquisition and wireless to receive and dispatch studying systematic

The technology of data acquisition is an important branch of information science. It is not only employed in intelligent instruments but is also widely used in modern industrial production and military science. This technology is essential for process control, condition monitoring, failure diagnosis, and quality detection, all of which rely on data collection systems. The one-chip computer, known for its powerful processing, strong anti-jamming capability, high reliability, and excellent flexibility, serves as the basis for many central data collecting systems across various fields.

Data collection systems based on one-chip computers typically utilize two methods to achieve data acquisition. The first method involves integrating the data collection component into a plug-in card that fits into the computer's expansion slot, allowing direct connection between the A/D switching device and the computer's bus interface. This approach, while facilitating system integration and reducing lead time, limits hardware configuration flexibility and portability.

The second method involves creating an independent data collection system with its own microprocessor, which communicates with the computer via a serial port to achieve data acquisition. This method enhances flexibility in data processing and reduces circuit complexity, enabling real-time sharing of data among multiple users. Continuous data transmission is essential for maximizing the utility of the collected information.

A wireless emission circuit system can be designed to integrate various sensors and gather data efficiently, allowing for comprehensive data sharing. The wireless dispatcher system utilizes radio technology, where variations in electric current produce radio waves that carry information through modulation. These waves travel freely, reaching the receiving end as electric waves. The electromagnetic field generated by the electric wave induces current in conductors, enabling demodulation to extract information.

The system employs the STC89C52RC microcontroller and the ADC0809 analog-to-digital converter as part of the data acquisition system. It is characterized by small size, portability, low power consumption, and cost-effectiveness, making it flexible and economical to develop. The overall data collection system uses the one-chip computer as the central control device, acquiring data from physical quantities through the ADC0809, processing the data, and transmitting it wirelessly via the nRF905 module, with programming conducted in C language.

The data collection system requires a communication interface to facilitate machine format transmission. Data transmission between the computer and the data collection system can occur through wired connections or via the nRF905 wireless radio frequency chip, which establishes a wireless communication channel. The nRF905 module integrates features such as power management, crystal oscillators, low-noise amplifiers, frequency synthesizers, and power amplifiers, all on a single chip. The use of Manchester encoding and decoding enhances the convenience of data transmission for users, ensuring efficient communication and data sharing within the system.

In summary, this data acquisition system effectively combines advanced technology with practical applications, ensuring reliable data collection, processing, and transmission across various fields.The technology of data acquisition is the important branch of information science, it not merely employs in intelligent instrument, and in modern industrial production, military science is used widely, no matter proceeding control, condition monitoring, or failure diagnosis, quality detection, all due to data collecting systems. Because one-chip c omputer powerful and antijamming capability strong and reliability high and flexibility fine developing advantaging such as being easy, have made on the basis of the one-chip computer is a central data collecting system is widely used in a lot of fieldsed. What the data collecting system based on one-chip computer usually adopts is two kinds of methods to realize data acquisition: One kind is to make the collecting part of the data into the plate card to insert in the computer expansion slot and realize data acquisition, namely A/ D switching device is connected with bus interface of the computer directly.

Such way based on system integration data collecting system of the computer, can shorten lead time, thus accelerate the job schedule, but the configuration of hardware lacks flexibility, non- portable and using whenever and wherever possible. Another method is to make the collecting part of the data into the independent system, there are one`s own microprocessors, the computer passes serial port and data acquisition unit communication, thus realize data acquisition.

The transmission over radio demonstrates very great flexibility in the treatment after data acquisition, save the intricate circuit, can realize easily many people share in real time, so we must launch the continuous data after test out in order to let more persons utilize. Test machine format transmission to want, design one can to carry on wireless emissive circuit system by various the intersection of sensor and information come oned to gather, so can carry on overall sharing, etc.

to data with data better. The wireless dispatcher`s system adopts the radiotechnics. Will produce this phenomenon of the radio wave by the change of electric current power in the conductor, can load on information the radio wave through modulating. Through free to ask, travel, arrive receiving end as electric wave, the electromagnetic field that the electric wave causes can produce the electric current in the conductor while changing.

Draw while changing information from the electric current through demodulation out, achieve the goal of transmitting information. This system chooses STC89C52RC chip and ADC0809 and puts up the acquisition system, small, portable, the low grade characteristic of the power consumption, and the price is low, it is flexible to dispose, the development cost is lower.

As shown in Fig. 1, the whole data collecting system regards one-chip computer as and controls the key device, carried on data acquisition to the physical quantity examined input by ADC0809 digital-analogue converter, deal with the intersection of data translation and the intersection of backload and one-chip computer that gather, then carry on transmission over radio through nRF905 data punish, this course is programmed through language C. In fact, this system is the information sampling system taking analog-digital converter ADC as the core.

The data collecting system must have a piece of communication interface and computer to carry on machine format transmission, the computer and communication of the data collecting system can carry on data transmission through the cable, choose the wireless radio frequency chip nRF905 and finish the wireless communication channel, module such as nRF905 integrated power management, crystal oscillator, low-noise amplifier, frequency synthesizer, power amplifier on-chip, Manchester encoding /decode finish from hardware on-chip, need last Manchester encoding data user, so it is very convenient to use. STC89C52RC one-chip computer is based on 8051 the cmo 🔗 External reference