At present, research on fixed torque electric wrenches mainly focuses on digital explicit fixed torque electric wrenches that have both fixed value and overload fault functions, and are popular among users through the user-friendly design of LCD display windows. In addition, there are torque value monitoring terminals, peak setting and alarm functions, wireless transmission functions, communication with installed wireless transmission terminals, data recording and management.

从传统的手指扭矩扳手到各种社会功能的数字式显式固定扭矩电动扳手，随着信息技术的发展可以实现了质的飞跃。现有的定扭矩电动扳手具有以下几个优点:

From traditional finger torque wrenches to digital explicit fixed torque electric wrenches with various social functions, with the development of information technology, a qualitative leap has been achieved. The existing fixed torque electric wrenches have the following advantages:

①技术不断成熟，性能比较稳定;

① The technology is constantly maturing and the performance is relatively stable;

（2）人性化管理操作系统界面;强大的数据分析处理主要功能等。

(2) Humanized management operating system interface; Powerful data analysis and processing main functions, etc.

固定扭矩电动扳手缺点:系统进行组件多任务复杂性文献中提出了作为一种人工智能扭力扳手系统，包括企业电子标签、扭力扳手、信息资源管理会计软件等，通过建立一系列发展智能手机芯片来完成一个必要的功能。使用扳手系统时，须能够同时启动计算机并对螺栓信息编号，创建网络信息记录学生管理分析软件，并在相应的螺栓上粘贴电子标签。力矩扳手的功能需要在教学准备教育工作任务完成后我们才能充分发挥，效率低，操作过程复杂。类似的扭力扳手结构比较复杂。准确性和困难目前，市场上的定扭矩电动扳手在精度和上都是难题。高精度扳手一般是数字式定扭矩电动扳手，进口产品，水平一般来说较高。低的是扭力针扳手结构相对简单，精度低，难以满足人们使用不同要求。这也是扭矩扳手在相关知识领域方面没有能力得到广泛应用的原因之一。

Disadvantages of fixed torque electric wrenches: The system is proposed as an artificial intelligence torque wrench system in the literature, which includes enterprise electronic tags, torque wrenches, information resource management accounting software, etc., by establishing a series of development smartphone chips to complete a necessary function. When using the wrench system, it is necessary to be able to simultaneously start the computer and number the bolt information, create a network information security record student management analysis software, and paste electronic labels on the corresponding bolts. The function of torque wrenches needs to be fully utilized after the completion of teaching preparation and educational tasks, resulting in low efficiency and complex operation process. Similar torque wrenches have a more complex structure. Accuracy and Price Difficulties Currently, fixed torque electric wrenches in the market are difficult in terms of accuracy and price. High precision wrenches are generally digital fixed torque electric wrenches, imported products, and generally have a higher price level. The low price is due to the relatively simple structure and low accuracy of the torque needle wrench, which is difficult to meet people's different requirements for use. This is also one of the reasons why torque wrenches do not have the ability to be widely applied in related knowledge fields.

智力低下。现有的固定扭矩电动扳手具有应用扭矩值和监测扭矩值的能力，但需要手动设置多少扭矩值才能适用于不同规格的螺栓。不同螺栓的预紧力矩值可参照有关手册或公式计算。目前，只有一些特殊行业的产品有预压螺栓的信息。普通螺栓预紧力的具体值是根据经验确定的，这是阻碍使用定扭矩电动扳手的原因之一。

Intellectual disability. The existing fixed torque electric wrenches have the ability to apply torque values and monitor torque values, but they require manual setting of how many torque values are suitable for different specifications of bolts. The pre tightening torque values of different bolts can be calculated by referring to relevant manuals or formulas. At present, only some special industry products have information on pre pressed bolts. The specific value of pre tightening force for ordinary bolts is determined based on experience, which is one of the reasons hindering the use of fixed torque electric wrenches.