what is the best tachometer for small engines

• 2022-10-13

In the early years, there were no digital instruments on cars, but analog instruments, that is, mechanical instruments. The mechanical instrument can directly and accurately display the current speed of the car. Secondly, the early stage is limited by the sensor acquisition accuracy, real-time, reliability and cost factors. But now this condition is no longer tenable. Then you will still have big questions. Although the two display modes exist at the same time, why do most instrument panels still use pointer instruments as the main display part, while digital instruments are secondary? Even an old driver, sometimes the surroundings are too noisy, so he will inevitably glance at the tachometer. At this time, the advantage of pointer table is incomparable. Because the pointer table displays concrete information, while the digital table displays abstract information. People react very quickly to specific information, almost instantaneously, but react slowly to abstract information.

At present, the analog pointer instrument panel is still an advanced speed indication tool. The instrument panel is a fixed size area, so it is more important to display the speed intuitively than the absolute accuracy. For example, some skilled old drivers only need to scan the approximate position of the pointer from the corner of their eyes to know the approximate speed. They do not need to read accurately to avoid distracting too much attention. Then the pointer can visually display the change trend of speed. Like a scene in the movie, something is going to explode, and some air pressure, water pressure and voltage instruments are rising in a thrilling way. At this time, there must be a red area to remind you of the danger. Therefore, the pointer dashboard gives drivers more confidence and generally knows how fast they are driving. Digital instruments only accurately reflect quantity, while pointer instruments reflect both quantity and proportion. Liquid crystal instrument, as its name implies, displays the information of the instrument on the LCD screen.

At present, many new cars have this design. But why are pointers still mainstream? The pointer display is cheaper, and it should be the solution with the highest cost performance for mainstream models. For manufacturers, the design of pointer type instrument is relatively simple. The pointer is controlled by a small stepping motor. The led light source creates the backlight effect through the polarizer and the shutter. At present, the cost of such mainstream mechanical instruments is less than 500 yuan. If a liquid crystal instrument is used, the price of the optical liquid crystal screen will be higher than this price. In addition to the graphic processing unit and UI interface design, the cost will be higher.