1、河南科技学院新科学院 2012 届本科毕业论文 中英文翻译 学生姓名： 所在院系： 所学专业： 导师姓名： 完成时间： 2012 年 5 月 10 日 Based on single-chip microcomputer control elevator voice station reporting device Key words: SCM ISD4004voice station reporting device 1 Introduction The modern building scale is larger and larger, more and more high on the
2、 floor, the elevator technical and quality requirements are also getting higher and higher. Modern elevator technology has been towards faster, more stable, more secure, more humane direction of rapid development. Elevator voice station reporting device is the embodiment of the humanized design of a
3、 specific performance. The elevator will be reported by voice or has reached the floor information, the running state of the elevator, welcome speech and music, can avoid wrong elevator passengers or floor, elimination of people take the elevator to the loneliness. 2 hardware circuit design The syst
4、em consists of signal acquisition and isolating circuit, SCM and its peripheral circuit, a speech chip circuit composed of three parts. The elevator floor after signal acquisition isolation after treatment sent to single-chip, single-chip analysis, judgment, extract the effective information, and th
5、en by processing output signals to control a speech chip circuit real-time broadcast. A 2.1 signal acquisition and separation circuit The newspaper station implement work needs to collect some relevant information to the operation of the elevator, elevator security requires additional system on elev
6、ator does not generate interference, the signal acquisition and isolation work is very important. The system used the elevator control panel on each floor button, elevator flat-layer signal and switch signal, as shown in table 1: Table 1the elevator control signal Considering the signal voltage leve
7、ls is not a, for the collection of signals required by different treatment. Experiments show that, when the collection circuit input resistance in500K ohm following can result when the signal voltage drop, affect the elevator work； in view of this, the author adopts the high input resistance of the
8、integrated operational amplifier circuit, the corresponding processing as shown in table 2: Table 2elevator signal processing and Applications After processing the signal by a photoelectric coupler isolation processing, sent to mcu. 2.2 single chip microcomputer and its peripheral circuit The system
9、 is based on ATMEL s AT89C51as controller, AT89C51P1.0, P1.1, P1.2, P1.3, P1.4and ISD4004pins respectively1,2,3,28,25 foot link, to control (1,2,3,28,25are respectively the ISD4004chip select terminal SS, serial input serial output end MOSI, MISO, SCLK, INT serial clock end interrupt ), the remainin
10、g pins connected after treatment of floor information: including 1-23floor information signal, DOWN1, UP1peace level DOOR1, DT1, as shown in figure 1 Figure 1 the AT89C51pin wiring diagram 2.3speech chip circuit Because ISD4004voice chip of the normal working voltage for the 3V, and system using the
11、 voltage of 12V, we used the LM317integrated voltage regulator for voltage conversion ( as shown in Figure 2). ISD4004 audio signal output pin AUDOUT pin through a filter capacitor is connected with the loudspeaker, AMCAP automatically mute end, through the use of a capacitor to ground, as shown in
12、figure 3. ISD4004 series single chip voice recording The single chip 8to 16 minutes the voice recording The built-in microcontroller serial communication interface The 3V single supply Multi information processing. The current25-30mA, maintaining the current1 A The electricity information stored for 100 years ( typical) The high quality, natural voice restoration technology The100000 recording cycle ( typical) Automatic muting function.
