《提升机械类外文翻译、矿井提升机精确测速的微机实现中英文翻译、外文文献翻译》由会员分享，可在线阅读，更多相关《提升机械类外文翻译、矿井提升机精确测速的微机实现中英文翻译、外文文献翻译（20页珍藏版）》请在金锄头文库上搜索。
1、英文原文The mine pit elevator measured precisely the fast microcomputer realizesThe mine pit elevator is the mine pit production important equipment, the load mineral, the material, the equipment and the personnel moves back and forth transportations duty in the well chamber, holds the extremely importa
2、nt position in the mine pit regular production. Moves reliably safely for the guarantee lift technique, the request control systems performance is good, must have the high velocity modulation performance and the position control.Along with the computer applied sciences swift development, uses the co
3、mputer control system substitution original electrically controlled system is one tendency. As a result of the mine pit elevator control system highly complexity and to the security reliable strict request, domestic has not developed at present is more ideal, is suitable for the industry scene reque
4、st the computer control system. This article introduced the author is engaged in a piece which this aspect works.1 To the microcomputer measured that the fast installment request To the microcomputer measured the fast installment the general request is: Resolution is strong, the precision is high, a
5、s far as possible short examination time. 1.1 resolution When carries on the rotational speed examination with the microcomputer, the resolution with changes was measured that the rotational speed which a survey meter digit corresponds the change quantity expressed. Supposes the rotational speed whe
6、n become n2 by n1 causes the survey meter value to change a character, represents the resolution with Q:The resolution size and systems control precision relations are really big, the Q value is smaller, resolution is stronger, systems control precision is higher, it is measures the fast installment
7、 an important target.1.2 measured that fast precision Measured the fast precision is refers to measures the fast installment to the actual tachometric survey precise degree. If with n represents the observed value and the actual value difference, n represents the actual rotational speed, % represent
8、 the measuring error which expressed with the relative value, thenObviously, % is smaller, measured that the fast precision is higher; systems control precision will be also higher. The measuring error % sizes decided that in measured the fast parts manufacture precision, and with measured the fast
9、method concerns.1.3 examination time The examination time is refers to between two time rotational speed sampling the time-gap. The examination times length the control performance influence is very big to the system, if the examination time is very long, then the system will realize the stable fast
10、 response with difficulty. The examination time is shorter, is more advantageous regarding systems control performances improvement.2 The microcomputer measured that fast general method By the electro-optical type revolving encoder and elevators axis solid joint, the elevator retransmits the certain
11、 amount every time (1080) the signal impulse, takes down the pulse number by the counter, and gives computer processing to realize the microcomputer to measure fast. Commonly used measured that the fast method mainly has the following two kinds.2.1 The M law measures fastThe M law measured that fast
12、 is reads the pulse integer which in the equal time-gap the revolving encoder sends out to figure out the rotational speed. The pulse number which sends out in the same time internal rotation encoder is different; the observed value is not same. The M law measured that fast schematic diagram as show
13、n in Figure 1.By the counter the pulse counting which transmits to the revolving encoder, timer every other time T sends out an interrupt request to CPU, extracts corresponding according to the counting values size the rotational speed. The revolving encoder retransmits pulse 1080 every time, altoge
14、ther has m pulse in the T time, then the rotational speed is:This kind measured that the fast method is by the counting value m size reflection rotational speed height, thus is called the M law to measure fast.(1) ResolutionMay result in according to the resolution definition by type (3):Obviously,
15、the M law measured fast when the resolution has nothing to do with the speed size, concerns with rotational speed sampling period T.(2) measured that fast precision When measures using the revolving encoder fast, its measuring error decided that concerns in encoders manufacture precision and with th
16、e rotational speed size. Supposes between the revolving encoder two neighboring pulses the angular deviations are. p%, an examination cycles counting value is m, then the measuring error is:The rotational speed is lower, m is smaller, the measuring error is bigger, measured that the fast precision is lower. Along with the RPM drop measured that the fast precision reduces is the M law measures a fast shortco
