Study And Manufacture Of Digital Electronic Torque Wrench Based On Microcontroller

The project . is sponsored by a company and the result is to manufacture market-oriented products. The aim of project is to develop a set of digital electronic torque wrench based on microcontroller.When working with fasteners a torque wrench can play an important role in the correct assembly of critical equipment components. First of all correct torque will hold the parts together. Proper torque ensures that one is getting maximum safe usage from a capscrew or bolt and that the equipment will not loosen up and fall apart in the field. Another purpose of proper torque on a fastener is to secure the mating parts in such a fashion as to keep warping or distortions from occurring.On the base of studying structure format of elastic unit and by introducing the principle of resistance strain sensor, principle of mechanism and mechanics of materials, we have developed a new torque sensor which is small in volume and has simple manufacture procedure. By following the design thought of intelligent instrument and adopting device-solutions of advanced instrument design, circuit of this instrument is designed to be reliable, simple in structure and economical in energy consuming. The embedded software adopts algorithm which is combined with measuring technique and computer technique so that the instrument is capable of self-adjusting to zero, calibration and digital filter. The instrument is small and battery is used to provide power. It has the same performance as imported similar products and will be able to match requirement of market.