The application of single chip PIC16C7X in low power consumption identification meter reading

Abstract: The application information of single-chip PIC16C7X in low-power identification meter reading is provided by excellent flowmeter and flowmeter manufacturers and quotation manufacturers. Abstract: At present, the meter reading systems in many industries generally stay at the level of manual copying and manual summarization. With the in-depth development of economic reform, people require information to be timely, accurate and comprehensive; obviously, manual transcription cannot satisfy economic life. For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. The following is the application article details of the single-chip PIC16C7X in low-power identification meter reading. At present, the meter reading systems in many industries generally stay at the level of manual transcription and manual summarization. With the in-depth development of economic reform, people require information to be timely, accurate and comprehensive; obviously, manual transcription cannot meet the requirements of economic life. This paper introduces a meter reading system controlled by a single-chip microcomputer, which can record a variety of information. It has the characteristics of low power consumption, low cost, easy portability, and easy operation. It is very suitable for meter reading systems in power plants, chemical plants and other related industries. 1. The overall structure and working principle of the system The system is composed of information communication, reader, communication base and computer. a file containing specific identification information“Information button”Placed in a fixed location, which may be a piece of equipment or a part, with a number of meters installed on the equipment to show the operating status of the equipment. The staff records the data on the form regularly or irregularly, using the“Reader”Read the information button first, extract the information in the information button and store it in“Reader”Inside, the information in the information button identifies the device, and then the readings of each meter on the device are recommended to be input through the keyboard on the reader and stored in the“Reader”inside; when the inspection is over, use“communication seat”stored in the network“Reader”The information inside is transmitted to the computer for processing, and the technicians and management personnel can accurately grasp the situation of the equipment on-site, and timely understand the problems existing in the operation and management of the equipment. Because the information in the information button is unique, cannot be imitated, and cannot be artificially forged, one information button can only identify one device or one part, and the reader contains a clock chip, which records the current time while reading the information button. The system is very convenient and practical for management and technical analysis. Taking into account the on-site conditions of some equipment and departments, two transmission methods, monitor and remote, are used between the communication base and the computer. In this system, the design and manufacture of low-power, portable reader is the core and key. 2. Design of a low-power portable reader 2.1 Design principles There are two design requirements for the reader in this system: (1) Small and exquisite, easy to carry; (2) Powered by batteries, the power must be small to prolong battery use life. According to these two requirements, in the design, one is to use a highly integrated chip package, and the other is to use as few peripheral components as possible. Through the screening of several types of CPU, we use the PIC16C74 of Microchip Company in the United States as the CPU in this system, which especially meets the above requirements. PIC16C74 has 44 pins, many I/O pins, and many functions are integrated inside, which can save a lot of peripheral components and reduce system power consumption. 2.2PIC16C74 microcontroller PCI16C74 microcontroller is a low-power, high-performance chip. Due to the fully static CMOS design, the power supply operates with low energy consumption and is very reliable. On-chip power-on reset circuit, watchdog timer circuit and RC oscillator circuit selection, etc., do not need to add expensive off-chip supported functional components, thereby reducing system cost and system power consumption. The small die size of the PIC combined with Microchip's advanced CMOS technology allows the chip to have a wide performance range and low operating current (typical: 15 operating current at 3V, 32kHz).μA) and very small standby state current (more than 1 under 3V operation in sleep modeμA). The low current characteristic is ideal for long life battery powered applications. The chip has 8 high-speed A/D conversion channels. When A/D conversion is required, additional A/D conversion peripheral components can be omitted. using advanced classes—RISC structure, Harvard dual bus structure, two-level instruction pipeline structure, with 8-level stack, multiple internal and external interrupt bits, only 35 instructions, easy to program, less software code, and fast execution. The chip also has a sleep (SLEEP) function, execute a SLEEP instruction, the chip will enter the sleep mode. The chip can be woken up by means of internal or external interrupts to make the chip re-enter the normal working state [2].

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