The design of frequency meter based on single chip
Abstrac Frequency, also known as frequency counter or electronic
form. It is not only electronic measurement instruments and professional
in the field of measuring frequency and the cycle than the frequency of
measurement and counting, the important measurement instruments,
oscilloscopes and measuring frequency than more convenient, more
economic, especially the modern electronic counter products and
components And a variety of measurements of the digital frequency, has
been widely used in computer systems, radio communication equipment,
automated production process measurement and control devices, with LED,
LCD modules figures show that the number of instruments and many
scientific and technical fields. It can be said that along with the
development of digital technology, computers, communications equipment,
audio and video technology into the research, production, military
technology and economic spheres of life, until the families and
individuals, making electronic means of measuring frequency counter and
the electronic equipment and even for the decoupling Inseparable
technology.
I have designed one kind of frequency meter which regarded
Single-Chip Microcomputer AT89C51 as the core.The mathematical operation
of applying in designing Single-Chip Microcomputer and controlling the
function, has overcome the general digital frequency meter in the
shortcoming not high of the precision of low frequency; frequency meter
at first with timing of Single-Chip Microcomputer / counter 1S produces
as controlling the gate signal regularly.Then examine signal is it have
a facelift square wave cycle conduct of pulse signal after count to
amplify, is it examine into frequency value of signal to try to get ,
show through 8 circuit display number value dynamically finally.The
circuit is made up of three following parts mainly: a.AT89C51
Single-Chip Microcomputer. It is a core of the frequency meter, most
work are finished by it; b.Enlarge and have a facelift the circuit.
Prepare for frequency measurement; c. the display circuit. Used for
showing frequency value.
Key Words: Single-Chip Microcomputer; Frequency Meter; Display
