Gas flow field indication method and device and flowmeter installation method and system

The invention discloses a gas flow field indication method, comprising the following steps: arranging a ribbon at a position to be measured in a gas flow field, one end of the ribbon being a fixed end, the other end being a free end, and the ribbon floating in the gas flow field; and then the floating state of the ribbon is obtained, and whether the to-be-measured position meets the flowmeter installation requirement or not is judged according to the floating state. According to the gas flow field indicating method, the steps are simple, operation is convenient, and the stable position of the flow field can be rapidly, accurately and objectively obtained. The invention further provides a gas flow field indicating device and a flowmeter installation method and system. 本发明公开了一种气体流场指示方法，在气体流场中的待测位置处布置飘带，飘带一端为固定端，另一端为自由端，在气体流场内飘动；之后获取飘带的飘动状态，并根据飘动状态判断待测位置是否满足流量计安装要求。本发明的气体流场指示方法步骤简单，操作方便，可以快速、准确、客观地获取流场稳定的位置，本发明还提供一种气体流场指示装置以及一种流量计安装方法及系统。