To ensure that the laser proximity fuze can detect the ground target during the intersection between the laser detection system and the ground target, based on the dual-transmitter dual-receiver laser circumferential scanning detection mechanism, we established the constraint functions of scanning frequency and laser pulse frequency without missing measurement. According to the surface characteristics of the plane target, we derived the calculation models of the laser echo power and the minimum detectable echo power of the detection system to the plane target under the random intersection attitude. The calculation function of the angle between adjacent laser beams is obtained based on the minimum detectable echo power. We discussed the relation of the scanning frequency, the laser pulse frequency, the angle between adjacent laser beams and the intersection angle, focused on the influence of the intersection angle and the detection distance on the laser echo power. The simulation experiments were carried out under different laser peak powers and detection distances, the experimental results fully demonstrate that the laser echo power calculation model established in this paper is correct; the detection ability of the system is improved to a certain extent by increasing the laser peak power.

The intersection status of terminal‐sensitive projectile and target is uncertain, which leads to the problem that it is difficult to accurately calculate the laser echo power. This paper studies a new calculation method of laser echo power based on laser circumferential scanning detection mechanism and establishes the mathematical model of laser dynamic scanning by the spatial geometric relationship between terminal‐sensitive projectile and ground target. Combining the characteristics of reflected laser echo power of ground target, we derive the laser echo power calculation function with temporal and spatial distribution characteristics. According to the detection requirements, we configure the parameters of the system and carry out quantitative simulation experiments, the results show when the emitting frequency and scanning speed of pulsed laser were matched, the detection probability is the greatest. With the increase of intersection distance, the reflected laser echo power will decrease, which is basically consistent with the simulation results.

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