1、前 言职业学校的英语教学如何以就业为导向，突出职业性和实用性，对广大英语教师提出了很高的要求。为了让英语真正为学生所用，为学生的专业服务，我们尝试在电子和机械专业的一些课程教学项目中实施双语教学，鼓励学生学有用的英语，用有用的英语。本手册包括电子专业的五个模块及机械专业三门课程的基础知识，是由专业教师和英语教师互相合作，结合电子、机械课程收集汇编而成，材料贴合专业实际和学生实际，突出实用性和可操作性。由于双语教师自身水平和学生外语基础等条件限制，我们在专业课程中渗透的英语知识和技能侧重在专业标识、专业术语、操作规范、基础概念的认知、理解和运用。希望通过双语教学的途径，对学生专门用途英语的学习有
2、一定的帮助。由于编者水平有限，手册难免有不足之处，甚至出现不当之处，恳请使用者给予批评指正。编者2010 年 10 月Contents 目录Part One Electronics 电子Module 1 Recognizing Multimeter Panel 认识万用表的面板Module 2 Understanding of the Circuit 认识电路Module 3 Identification and Detection of Components 元器件的识别与检测Module 4 Multimeter Measuring DC Voltage and Current 万用表测直
3、流电压与电流Module 5Measuring the Resistance 万用表测电阻Part Two Mechanology 机械Section 1 Basic knowledge of Mechanology 机械原理Section 2Sketchup of AutoCAD AutoCAD 的一些快捷命令Section 3 CNC Lathe 数控 车床Part One Electronics模块一 认识万用表面板（Recognizing Multimeter Panel）面板：panel board 指针：index电流：electric current 电压：voltage 电阻：
4、resistance（一）学习目标（learning objectives）认识面板(know the panel board)（二）工作任务（work task）指针式万用表是一种用途广泛的常用测量仪表，其型号很多，但使用方法基本相同。以 MF47 型普通指针式万用表为例学习万用表的使用方法(Analog Multimeter is a widely used for the measurement instruments, many of its models, but using the same method. To MF-47-type ordinary multimeter Ana
5、log multimeter to use an example to learn)。（三）相关实践知识(Practical knowledge related to) MF47 型普通指针式万用表为磁电式多量程万用表。可测量直流电流、直流电压、交流电压、直流电阻等，具有 26 个基本量程和 7 个附加量程(MF-47-type general magnetic Analog Multimeter for the multi-range multimeter. Measurable DC current, DC voltage, AC voltage, DC resistance and so
6、 on, with the basic range of 26 and 7 additional range)。MF47 型普通指针式万用表面板外观如图 111 所示，其主要分刻度盘和操作面板两部分(MF-47 Type Analog Multimeter panel of ordinary appearance as shown in Figure 1-1-1, the main sub-dials and control panel of two parts)。1刻度盘(graduated plate)MF47 型普通指针式万用表有 7 条刻度线，如图 112 所示(MF-47 Type
7、Analog Multimeter has seven general calibration line, as shown in Figure 1-1-2)。每条刻度线的功能和特点如表 111 所示(Each scale line functions and features as shown in Table 1-1-1)。表 111 MF47 型万用表刻度线功能(MF-47 multimeter calibration line function)刻度线(tick mark)功能(function) 特点(Features)第一条(First)欧姆刻度线(Ohms scale line)
8、最右端为“0” ，最左端为 “” ，刻度不均匀(The extreme right as “0 “, best left to “, scale heterogeneous)第二条(Second)交直流电压、电流刻度线(AC and DC voltage, current calibration line)最左端为“0” ，最右端下方标有三组数，它们的最大值分别为 250、50 和 10，刻度均匀(The extreme left as “0“, the most right side below the standard three sets of numbers, their maximu
9、m values of 250, 50 and 10, uniform scale)第三条(Third)交流 10V 挡专用刻度线(AC 10V line block-specific scale)交流 10V 量程挡的专用读数标尺(AC 10V range block special reading scale)第四条(Fourth)测三极管放大倍数专用刻度线(Transistor amplification test specific scale line)放大倍数测量范围 0300，刻度均匀(Magnification measuring range from 0 to 300, sca
10、le uniform)第五条(Fifth) 电容量读数刻度线(Scale 电容量测量范围 0.0010.3F，刻度不均匀pointerResistance gauge readingAC and DC voltage and current readings scalevoltage and current readings scaleand DC voltage, current reading scalevoltage, current reading scaleAC 10V-specific calibration lineline capacitance readings) (Capa
11、citance Range 0.001 0.3 F, scale heterogeneous)第六条(sixth)电感量读数刻度线(Scale line inductance readings)电感量测量范围 201000Hz，刻度不均匀 9 Inductance measurement range 20 1000Hz, uneven scale)第七条(seventh)音频电平读数刻度线(Audio level calibration line reading)音频电平测量范围10dB22 dB，刻度不均匀(Audio Level Range-10dB +22 dB, scale heter
12、ogeneous)第一条刻度线上标有“”字样，表明该刻度线上的数字为被测电阻值。其刻度最右端为“0” ，最左端为“” ，并且刻度不均匀。在未测量时表针指在最左端处“” 。(The first scale line marked “ words, indicating that the scale compared with the measured line resistance. The extreme right scale for the “0 “, best left to “, and uniform scale. The lack of measurement refers to
13、the extreme left when the gauge needles Office “)第二条刻度线用于交直流电压和直流电流读数的共用刻度线。其刻度最左端为“0” ，最右端为满刻度值，其量程表示有 250、50、10 三个挡位，当选择不同挡位时，要将刻度线的最大刻度看作该挡位最大量程数（其他刻度也要作相应变化） ，例如，当挡位选择开关置于“50V”挡测量时，表针指在刻度线最大刻度处表示测量的电压值为 50V（而不是 250V） 。(The second calibration line for the AC and DC voltage and DC current readings
14、 of the common tick. The scale at the extreme left as “0“, the most right side for the full scale value, the scale said 250, 50, 10, 3 gear, when you select different gear when the calibration line to the maximum scale range as the maximum number of gear (also corresponding changes in the other scal
15、e), for example, when the gear selection switch at “50V“ block)第三条为交流 10V 专用刻度线。在挡位选择开关置于交流 10V 挡测量时查看该刻度线。(Third special scale for the exchange of 10V line. In gear selection switch at AC 10V block view of the graduation line measurement)第四条刻度线是测量晶体管放大倍数专用刻度线。在测量三极管放大倍数时查看该刻度线。(Fourth line is the m
16、easurement scale transistors dedicated magnification scale line. Triode amplification factor in the measurement when the view of the graduation line)由于万用表主要是用来测量电阻、电压、电流和三极管的放大倍数，而较少测量电感量、电容量和交流的 dB 值，因此第五七条刻度线较少使用，本书不作具体介绍，如果读者感兴趣，可查看万用表附带的使用说明书。(As the multimeter is mainly used to measure resistan
17、ce, voltage, current, and transistor amplification, and less measuring inductance, capacitance and exchange of dB value, so the fifth line 7 scale used less, the book does not specifically introduced If the reader interested, you can see manual supplied with the multimeter)2操作面板(operation panel)MF47
18、 型普通指针式万用表操作面板如图 113 所示。(MF-47 Type Analog Multimeter normal operation panel as shown in Figure 1-1-3)（1） “+”、 “COM”插孔：用以插入红（+） 、黑（-）表笔。(“+“, “COM“ jack: used to insert the red (+), black (-) Table document)（2） “N”、 “P”插孔：用于测量晶体三极管的直流放大系数 hFE,使用时根据 NPN、PNP 型晶体管分别插入相应插孔。(“N“, “P“ jack: used to measur
19、e the transistors DC amplification factor hFE, when used according to NPN, PNP transistors were inserted into the corresponding jack)（3）2500V、5A 插孔：分别测量 2500V 挡的交直流电压、5A 挡直流电流，使用时将红表笔插入该孔内。(2500V, 5A socket: block were measured 2500V AC and DC voltage, DC current block 5A, use the red table document
20、 into the hole)（4）欧姆调零：使用电阻各量程挡测量电阻时，必须用该旋钮进行欧姆调零。方法；将红、黑表笔触碰（短接）在一起，旋动调零旋钮，使指针指向“0”处。(Ohm zero: using resistance measurement of resistance of the range block, it must use the knob to zero ohms. Method; the red, black table document touching (shorted) together, rotating zero adjustment knob, so that
21、 the pointer points to “0 “Department)（5）机械调零：当欧姆调零不能调到“0”处时，需用平口改锥缓缓调节该处，使指针指在“0 ”处，即进行机械调零。 (Mechanical zero: zero can not be transferred when the ohm “0 “ office, use a flat screwdriver mouth slowly adjust there, so that the pointer refers to “0 “ branches, namely mechanical zero)（6）转换开关：其作用选择测量的
22、项目和合适量程。(Switch: its role in selection of projects and the appropriate measurement range)3主要量程(Main Range)MF47 型普通指针式万用表主要量程如表 112 所示。(MF-47 Type Analog Multimeter ordinary major scale shown in Table 1-1-2)表 112 MF47 型万用表主要量程 9 MF-47 multimeter major scale)测量挡位(Measurement gear)量 程(range)测量挡位(Measur
23、ement gear)量 程(range)直流电流(DC)0500mA(分 5 挡)05A交流电压(a.c. voltage)01000V(分 5 挡)02500V直流电压(VDC)01000V(分 7 挡)02500V直流电阻(D.C. resistance)0(分 5 挡)音频电平(Audio Level)10dB22 dB电感( inductance)201000HhFE 0dB1mW/600电容( Capacitance)0.0010.3F 当采用其他电压挡测时，可在指示值上加上修正值。(When the voltage is blocked by other measurements, it can be added at the indicated value revised.) 测电感时需加10V/50Hz 电压。(When measuring inductance voltage required to increase 10V/50Hz) 测电容时也需加10V/50Hz 电压。(Required when measuring capacitor voltage increases 10V/50Hz)
