外文翻譯---數(shù)字式轉(zhuǎn)速測(cè)量?jī)x-全文預(yù)覽
【正文】 switch S3, when is high time that test frequency. Meanwhile, the system software has set a number of logical fault diagnosis functions, such as speeds above 99 999 r / min, the system will display PPPPP, that go beyond the scope of this gun is measured, and as if the M / T velocity measurement, the Select the measurement frequency, it shows EEEEE, prompts the user error and so on. As the gun is generally in the industrial field in the working environment of sources of interference, so in the design, using antijamming measures, such as power supply filtering, decoupling, pay attention to the trend of ground, then the locations and other hardware interference approach to CPU, RAM selftest, software redundancy, software, software such as antijamming technology trap. Figure 2 Circuit Digital Speed Meter 中文翻譯 數(shù)字式轉(zhuǎn)速測(cè)量?jī)x 摘要 介紹了一種以 MCS51 系列單片機(jī) 8032 為控制主體的數(shù)字式轉(zhuǎn)速測(cè)量?jī)x。s Pulse on m1 and m2, timing pulse frequency f, rotor output pulses per revolution for the p, the speed n = 60fm1 / pm2 (r / min). Such as the speed measured over 1 s pulses for the m1, rotor output pulse number per revolution, that great number of p, the speed n = 60m1 / p (r / min). 2 hardware speed measurement instrument Figure 2 constitute the grounds of speed 8032 MCU measuring circuit. 8032 is MCS51 series single chip, pared with the mon 8031 chip, a feature more than 8032 strong T2 timer / counters and 128 bytes of internal RAM, which T2 counter with 16bit autoreload and capture, can for timer / counter with, but also used as a baud rate generator. The system used for time T2, which take into account regular pulse, regular pulse signal directly from the 8032 chip address latch signal ALE client leads, and through the 74LS74 dual D flipflop frequency, was two points. When using 6 MHz crystal oscillator, the time pulse frequency fc is MHz. T0 accrual speed pulse counter fp, T1 time pulse counter for taking into account fc, trigger DFF1, DFF2 and 1,2,3,4 ponent count and gate control circuit, can also start and stop counters T0 and T1. P0 port to allow control through the end of 8D with latch 74LS377 extends an 8bit output, as a five segment LED digital display of the data line selection code. , access switches S1 and S4, S1 for the very few P set selector switch, S4 input pulse for the very few keys. and are connected S2 and S3 switch, S2 switch method for the speed selection key。外文翻譯 Digital Meter for Measuring Rotational Speed Abstract A digital meter for measuring the rotational speed is introduced in this paper. It is controlled by an MCS51 series singlechip microputer 8032. It contains the following features: rational design, high accuracy, wide measurabilit
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