Motion detection plays an important role in visual systems, On the basis of Reichardt’s model of motion detection for insects an engineering model of motion detectors with multiple-channels has been proposed in this article. This model is capable of detecting direction and transverse angular velocity in a wide available range in real time. Not only can it detect the motion of a pattern with a discriminatable outline and edge, but also detect the motion of a texture pattern without a discriminatable outline and edge.
The parameters of the model are suggested as follows:
1. The time constant τ_L of low-pass filter of the first order influences the available range of velocity detection. It depends on the space d between two recievers of the motion detector, delay time t_a corresponding to the superior limit of detectable velocity and delay time t_b corresponding to the inferior limit of detectable velocity as well as the degree of precision required in velocity detection.
2. The ratio of time constants high-pass filter τ_H to loss-pass filter τ_L also influences the available range of velocity detection. The smaller the tine constant L_H is, the greater the superior limit of detectable velocity will be.
3. The intergratation time T of correlator is determined as follows: 

4. The available range of velocity detection by motion detectors having multiple-channels consisting of N channels is enlarged to . The space d between two recievers of motion detector in the kth channel can be determind as follows:

，k=0, 1, ···, N.