How to Use Tachymeter Function on Watch Bezel - Usage Instruction and Definition如何使用tachymeter功能上观赏外框-使用的指示和定义

On some of the analog watches or wristwatches from branch such as Omega and Casio, there is a outer scale bezel that inscribed around the rim and named tachymeter (also known as tachymetre or tacheometer).对一些模拟手表或手表，从科，如欧米茄和卡西欧，是有外尺度外框者认为，周围环和命名tachymeter （也称为tachymetre或tacheometer ） 。 If you flip through the watch’s user guide or manual, you will not likely to find any explanation or definition on what is tachymeter or how to use the tachymeter functionality.如果你翻开手表的用户指南或手册，您将不会有可能找到任何解释或定义，对什么是tachymeter或如何使用tachymeter功能。 Tachymeter is actually a tool used to compute speed based on travel time over a fixed distance travelled (like one mile or one kilometer). tachymeter其实是一个工具，用于计算速度的基础上旅行时间超过一个固定的路程（如1英里或一公里） 。 Thus, the tachymeter bezel or dial is a logarithmic scale (actually it’s not, as spacings between the marks on the tachymeter dial are proportional to 1/t where t is the elapsed time) that simplifies the computation of speed of an object, by computing the following function:因此， tachymeter外框或拨号是一个对数规模（其实不是的话，作为间距之间的马克对tachymeter拨号比例1 /吨其中T是经过时间）表示，简化了计算的速度，一个对象，通过计算下列功能：

Tachymeter Dial = 3600 / Elapsed Time In Seconds tachymeter拨号= 3600 /过去了，时间在几秒钟

Tachymeter illustration. tachymeter的例证。 Depending on on the range of the scale printed on the bezel, tachymetre timer normally works and valid for all elapsed times from about 7.2 seconds to 60 seconds, thus only able to measure speed greater than 60 miles per hour or 60 kilometers per hour.根据对范围内的规模已印载于外框， tachymetre计时器通常工程和有效期为所有的时代过去了，从7.2秒到60秒，因此，只能够衡量的速度大于60英里每小时或60公里的时速。

To use tachymeter, simply start the chronograph or stopwatch when the object measured passing the starting line.使用tachymeter ，只需启动计时秒表或对象时衡量合格的起跑线上。 When the object reaches the next mile or kilometer marker, stop the chronograph or stopwatch.当对象达到未来英里或公里的标志，停止计时或秒表。 The point on the tachymeter scale that adjacent to the second hand of the watch indicating the speed (in miles per hour or kilometers per hour) of object traveling between the two points.这一点对tachymeter规模毗邻二手的手表显示的速度（以英里每小时或公里每小时）的对象来往的两点。

For example, we want to measure the average speed of a vehicle is moving.举例来说，我们要衡量的平均时速的车辆是感人。 Start the chronometer or stopwatch function when the car passes the starting line, and stop the timer after the vehicle traveled exactly 1 mile or 1 kilometer.启动计时器或秒表功能，当车通过的起跑线上，并停止计时器后，车辆走过的正是1英里或1公里。 Then look at where the chronometer hand (the second hand of the watch) is pointing to, and get the reading or value of the corresponding number at the tachymeter bezel or dial.然后看看那里计时器手（二手的观赏）是指向，并得到读或价值的相应数字在tachymeter外框或拨号。 Let’s say the stopwatch stop at 3 o’clock position, meaning 15 seconds had elapsed for the car to travel 1 mile or 1 kilometer.让我们说，秒表停留在3点钟的位置，这意味着15秒已经过去了，为汽车旅行一英里或1公里。 At 3 o’clock position, the tachymetre value shows that number of 240, which means the average speed of the vehicle was 240 mph or km/h.下午3时的立场， tachymetre值显示，这一数字为240 ，这意味着平均时速的车辆是二百四十○英里每小时或公里/小时。

Due to the limitation and constraint on the tachymeter scale mentioned above which makes tachymetre measurements works and valid only for certain range of speed, so in order to calculate and measure slower speeds or higher speed, user can decrease or increase the unit of measurement (eg change to half-miles or half-kilometers, or ten miles or ten kilometres).由于限制和约束就tachymeter规模，上述这使得tachymetre测量工程，并只适用于一定范围内的速度，因此，为了计算和测量速度慢或更高的速度，用户可以增加或减少的测量单位（如改变半英里或半公里，或10英里或10公里） 。 However, simple calculation is needed in order to get the correct average speed by using this technique.但是，简单的计算是需要的，以便获得正确的平均车速通过使用此技术。 It’s also true if the length of the distance does not exceed a unit of mile or kilometer, or other unit which the speed will be based on.它也真实，如果长度的距离不超过一个单位英里或公里，或其他单位的速度，将依据。

For example, if we want to measure how fast the 200m athlete is running.举例来说，如果我们要衡量的速度有多快200米运动员正在运行。 Start the chronometer when the race starts, and stop the stopwatch when athlete crosses the finishing line.启动计时器，当比赛开始，停止秒表，当运动员越过终点线。 Let’s say the athlete used 20 seconds to finish 200m running, so according to tachymeter, the speed of the athlete is 180 km/h.让我们说，运动员使用的20秒完成200米跑，因此，根据tachymeter ，速度，运动员是180公里/小时。 However, the athlete only ran one fifth (1/5) of a kilometer, so we should divide 180 with 5 or 1/5 of 180, which mean the actual speed of the runner is 36 km per hour.但是，运动员只有然五分之一（ 1 / 5 ） 1公里，所以我们应该鸿沟180 5或1 / 5 180 ，这意味着实际的速度，亚军是36公里为一小时。

The above example can be used for object or thing that moving too slowly too, as when the object travels 1 mile or 1 kilometer, the duration would have exceed 60 seconds, the maximum limit of tachymeter.上面的例子中可用于物体或一件事，太慢，因为当对象旅行1英里或1公里，持续时间将超过60秒，最高限额tachymeter 。 So the possible workaround is to measure the time taken for the object to move a shorter distance (such as 100m) and divide the tachymeter value with 10 (as 100m is 1/10 of a kilometer).因此，有可能替代方法是测量花费的时间为对象的动议在较短距离内（如百米）和分化tachymeter价值10 （百米是1 / 10 1公里） 。

What if the object travels too fast, such as a rocket or plane.如果对象旅行太快，如火箭或飞机。 In this case, user can increase the units of the distance covered by the object to measure a longer period of time so that the duration is greater than at least 7.2 seconds (typically the lower limit).在这种情况下，用户可以增加单位的距离，所涵盖的对象来衡量一段较长时间，让时间大于至少七点二秒（通常为下限） 。 We can measure the time taken by the object to cover 10 miles, let’s say it took 30 seconds, so the tachymeter will tell us the the speed is 120 miles per hour.我们可以衡量的时间所采取的对象涵盖10英里，让我们说了30秒，所以tachymeter会告诉我们的速度是120英里每小时。 However, 10 miles have been traveled, so that actual speed is 120 times 10, which is 1200 mph.然而， 10英里已经走过的，使实际速度的120倍，是10 ，这是一二零零英里每小时。

Wikipedia维基百科 also explains that function performed by a tachymeter is independent of unit of distance (ie is not specific to miles or kilometers).还解释说，履行的职能由一个tachymeter是独立的单位的距离（即不具体，以英里或公里） 。 A tachymeter can be used to measure speed in nautical miles per hour or meters per hour, or to measure an industrial production process in units per hour. 1 tachymeter可以用来衡量的速度在海里每小时或米每小时，或以衡量工业生产过程中单位每小时。 A tachymeter is simply a means of converting elapsed time in seconds per X to X per hour . 1 tachymeter只不过是一种手段，转换的时间过去了，在几秒钟百分之十的x ％小时 。

IMPORTANT : This is a machine translated page which is provided "as is" without warranty. 重要说明 ：这是一个机器翻译网页是“按原样”提供的担保。 Machine translation may be difficult to understand.机器翻译可能很难理解。 Please refer to请参阅 original English article英文原版的文章 whenever possible.只要有可能。

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