Functional block diagram of digital frequency meter contents hide 1. The digital frequency meter is commonly called a counter since it determines the frequency. Frequency counters circuits electronics tutorial and schematics. The number of pulses counted at the output terminal. The sinusoidal signal whose frequency is to be measured is applied to signal input terminals con1, as. The following figure shows the block diagram of mc9s08gw64based flow meter software. Digital multimeter working principle analyse a meter. The wattmeter is an instrument for measuring the electric power or the supply rate of electrical energy in watts of any given circuit.
It is an active circuit which converts an analog input signal to a digital output signal. Applications of digital frequency meter working principle of digital frequency meter 1. The block diagram of basic wave analyzer is shown in below figure. The function of each block present in basic wave analyzer is mentioned below. The design site for hardware software, and firmware engineers. Pdf design of equal precision frequency meter based on fpga. The line frequency is measured in software and corrected for measurement errors. Further, the smart power meter needs to meet the security requirements of the dlms international standard and so on. With the component values listed in the schematic diagram below, the counting time is 1s. This pic software combines frequency counter and frequency lock functions. It uses and lsi counterdisplay driver, lcd readout, and a few logic chips for timebase and timing pulse circuitry. The block diagram of the basic circuit of a digital frequency meter is shown. An optical sensor consists of an optical disk placed near the motor which generates pulses proportional to the rotating shaft. Find frequency meter diagram related suppliers, manufacturers, products and specifications on globalspec a trusted source of frequency meter diagram information.
Block diagram of pic 16f877a based frequency counter 2 the input is sent into. Glucose meter reference design microchip technology. Frequency counters circuits electronics tutorial and. Digital frequency meter frequency measurement high.
Heres a simple panel frequency meter to measure the frequency of 230v ac mains. Smart meter using pzem004t for the measurement of electrical parameters like voltage, current, active. Pic frequency counter with frequency lock function. Figure 2 illustrates the block diagram of a typical glucose meter. Block diagram of digital frequency meter dfm polytechnic hub. Block diagram of digital frequency meter circuit and working. We have connected 6khz square wave with interrupt pin to measure its frequency. The output of amplifier is applied to the schmitt trigger. Basic principal of operation a simplified block diagram, indicates the principal. Digital frequency meter is a general purpose instrument that displays the frequency of a periodic electrical signal to an accuracy of three decimal places. Introduction to digital tachometer circuit working with. In this system, a typical multi meter may in this system, a typical multi meter may include features such as the ability to measure acdc voltage, dc current, resistance, temperature, diodes, frequency. You can connect any device to this pin which frequency you want to measure.
It counts the number events occurring within the oscillations during a given interval of time. System block diagram for atsc digital tv as a pioneer in developing numerous consumer electronic products, toshiba has a deep understanding of the consumer market and is able to. Digital phase meter the simplest technique to measure the phase difference between two signals employs two flipflops. Frequency meter detailed circuit diagram available.
The block diagram of a digital multimeter is shown in the fig. The signals to be fed must be of the same frequency. Pic c software techniques are also implemented with this project. The input signal is amplified and converted to a square wave by a schmitt trigger circuit. Pic frequency counter with frequency lock function this pic software. In this diagram, the square wave is differentiated and clipped to produce a train of pulses, each pulse separated by the period of the input signal. Digital multimeter working principle electrical academia. Ideal wherever there is a need to measure and digitally display the frequency. Since a measurementwhiledrilling tool is exposed to a combination of hightemperature and shockvibration loading, flipchip technology was selected to avoid.
The autoranging digital multimeter dmm only requires you to choose your electrical quantity you are attempting to measure, make sure you are. The signal whose frequency we have to be measured is first to be amplified through amplifier. The oscillator, wired around gate n1, produces 10hz clock. The above block diagram clearly defines the connection diagram of the lcr meter. Renesas offers microcontrollers for singlephase power meters. Introduction to frequency meter universal counter need of frequency meter a digital frequency meter is a generalpurpose, basic, digital counter for measuring. Panel view of the type 1150a digital frequency meter. Digital frequency meter is a general purpose instrument that displays. Ac digital frequency meter 40 to 90 hertz blue sea systems. The measurement of dc quantities will be done by exciting the bridge with dc voltage. The circuit is low component one and the reading is reliable and accurate. The combination of a frequency tovoltage converter fvc. When you connect it to the 230v ac line, the display shows the line frequency. The block diagram of a digital frequency meter is shown in fig.
Ac digital multifunction smart meter using innovatorsguru. Based on the famous at89c52 microcontroller, this 500 khz frequency. Another type of frequency meter is the digital frequency meter, which measures frequency up to about 100 mhz and displays a digital readout of the measured frequency as shown in figure 2. It provides metering of current, voltage, real and reactive power, energy use, cost of power, power factor and frequency. Block diagram of the digital frequency meter is shown in fig. The unknown frequency signal is fed to the schmitt trigger. The power meter must have stable operation during a specified period of time. Design and development of pic microcontroller based 3. Block diagram of digital frequency meter dfm the basic block diagram of basic digital frequency meter dfm is shown in above figure. We can adjust the values of inductor, l and capacitor, c in such a way that it allows only the desired harmonic frequency. Want to do research and project for this digital energy meter.
Software functions are presented inside the dashed area. Digital frequency meter circuit diagram and working. The signal may be amplified before being applied to schmitt trigger. Basic electronic instrument handbook, clyde coombs, editor, mcgrawhill, 1972. To the other terminal of the gate, a pulse of 1 sec is applied as shown in the fig. By adding couple of transistors and operation amplifier tl082, it is possible to lock the lc oscillator frequency. Design and construction of digital line frequency meter. Pasternacks library rf and microwave block diagram are designed to provide engineers and designers with examples of common rf systems schematics while illustrating the rf products. Design and development of pic microcontroller based 3 phase energy meter thousif ahamed1, a. Digital frequency meter circuit diagram in above circuit diagram pulse generator is used to generate square wave of any frequency. Digital metering industrial and commercial power quality. With a single ic l 7107, you can make a 4 digit voltmeter that can show 02000 voltsthrough seven segment display. Resolution and sensitivity of a digital meter, digital displays for meters.
Digital frequency meter using arduino full electronics. The signal waveform whose frequency is to be measured is converted into tngger pulses and applied continuously to one terminal of an and gate. Use the blue sea systems circuit wizard to select the correct wire size, circuit breaker or fuse type and. The circuit diagram of the digital frequency meter is shown in fig. Two lowcost integrated circuits can be combined to create a simple digital frequency meter. In a heterodynetype frequency meter, what is the difference between the oscillator frequency and the unknown frequency. It consists of arduino uno board, optocoupler mct2e ic1, 16. Electromagnetic wattmeter s are used for measurement of utility frequency and audio frequency power. Pqm ii power quality metering system continuous metering of threephase systems with waveform and data logging.
Digital frequency meter using arduino full electronics project. Digital frequency meters, time interval measurements, frequency ratio measurementsphase metersphase measurement by voltage addition method, balanced modulation type, phase meters. Since a measurementwhiledrilling tool is exposed to a combination of high temperature and shockvibration loading, flipchip technology was selected to avoid. Posted thursday, january 12, 2012 the circuit was designed to create a low cost frequency meter that will cover the range of 1 hz to 1 mhz with a digital. The reed type meter is useful only at low frequencies and only over a limited range of frequencies. This paper describes a very simple and compact design of digital line frequency meter using pic microcontroller. Digital implementation of glucose meter using the pic16lf178x device this section details the hardware design and the software development of the glucose meter using the amperometric method. Software timed analog output16bit, 16 or 32 channels block diagram. System block diagram for atsc digital tv electronic products. This is a schematic and block diagram of a 2mhz frequency counter. As shown in the block diagram, in a typical digital multimeter the input signal i. This thesis describes the design and construction of digital multi meter using pic microcontroller. Hello sir, can you please email me the entire circuit diagram together with the software code.
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