At present, the research on constant torque electric wrench mostly focuses on the digital explicit constant torque electric wrench with constant value and overload fault functions, and is welcomed by users through the humanized design of LCD display window. 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:①技术不断成熟，性能比较稳定;（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。

From traditional finger torque wrenches to digital explicit fixed torque electric wrenches with various social functions, a qualitative leap can be achieved with the development of information technology. The existing constant torque electric wrench has the following advantages: ① The technology is constantly mature and the performance is relatively stable; (2) Humanized management operating system interface; Powerful data analysis and processing functions.

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。

Disadvantages of fixed torque electric wrench: the system carries out component multi task complexity The literature proposed that as an artificial intelligence torque wrench system, including enterprise electronic tags, torque wrenches, information resource management accounting software, etc., a necessary function can be achieved by building a series of smart phone chips.

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。

When using the wrench system, it must be able to start the computer at the same time and number the bolt information, create the student management analysis software for network information security records, and paste electronic labels on the corresponding bolts. The function of the torque wrench can only be fully exerted after the teaching preparation and education tasks are completed. It is inefficient and the operation process is complex. Similar torque wrenches have complex structures.

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。

Difficulty in accuracy and price At present, the fixed torque electric wrench on the market is difficult in accuracy and price. High precision wrenches are generally digital constant torque electric wrenches, imported products, generally speaking, the price level is high. The low price is that the torque pin wrench is relatively simple in structure and low in accuracy, which is difficult to meet people's different requirements. This is one of the reasons why torque wrenches are not able to be widely used in relevant 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。

Mental retardation. The existing fixed torque electric wrench has the ability to apply torque values and monitor torque values, but it requires manual setting of torque values to be applicable to bolts of different specifications. The pretightening torque of different bolts can be calculated by referring to relevant manuals or formulas. At present, only some products in special industries have information about preloading bolts. The specific pre tightening force of ordinary bolts is determined based on experience, which is one of the reasons that hinder the use of constant torque electric wrench.