A control algorithm for wireless sensor to estimate and calculate environmental parameters. The control algorithm comprises a method to calculate the distant between an approaching object to wireless sensor receive antenna by measuring the travelling time between completion of transmission of transmit signal at the transmit antenna and completion of reception of the reflected transmit signal at the receive antenna, a method of calculating the approaching speed of an object to wireless sensor receive antenna by using multiple distance measurements, and a method to calculate impact force from an approaching object based on estimated mass of the object and deceleration of its speed.