The invention relates to a
wireless stem flow sensor and a method for controlling the same. The sensor comprises a sensing parameter acquisition unit and a
wireless on-
chip system, wherein the sensing parameter acquisition unit comprises a
heating element clamped on the surface of a stem, and an upstream temperature sensor and a lower downstream temperature sensor which are symmetrically arranged with the
heating element as a center and acquire an upstream temperature electrical
signal and a downstream temperature electrical
signal of the stem respectively; the
wireless on-
chip system comprises a
microcontroller; and according to the upstream temperature electrical
signal and the downstream temperature electrical signal, the
microcontroller acquires and temporarily stores stem flow data in an on-
chip memorizer by a
thermal equilibrium method, receives an inquiry instruction and sends the stem flow data out; and a wireless radio-
frequency unit receives various instructions sent by an upper computer of a wireless sensing network, retransmits the instructions to the
microcontroller, receives the stem flow data sent by the microcontroller and sends the stem flow data to the upper computer by the wireless sensing network. The method adds the wireless sensor to the wireless sensing network and carries out
dormancy, the sending of the stem flow data and the adjustment of acquired frequency according to various instruction sent by the upper computer. The equipment is simple, accurate and convenient to manufacture and utilizes a wireless mode to reduce wiring cost.