Precise delay method for digital detonator

Abstract

The invention relates to a precise delay method for a digital detonator. The precise delay method comprises the following steps: S1: mounting the digital detonator at an explosion site, and electrically connecting the digital detonator to an exploder; S2: sending standard precise time with designed time length to the digital detonator by virtue of the exploder; and S3: calculating delay time according to standard precise time by virtue of the digital detonator. According to the precise delay method, by taking the standard precise time sent by the exploder as reference, an error range of internal vibration of the digital detonator is corrected, so that the precise delay time is calculated, and the precision is greatly improved, and therefore, an MCU, a single chip microcomputer and the like with relatively great internal vibration error range can be used for manufacturing the digital detonator, the limitation, related to time precision, of the prior art is broken through, and wide popularization and application of the digital detonator is facilitated.

Description

technical field [0001] The invention relates to the detonation technology of a detonator, and more specifically relates to a precise time-delay method for a digital detonator. Background technique [0002] With the development of economy and society, engineering blasting counting has been more and more widely used. In some occasions that require relatively high blasting, such as mines, tunnels, buildings, etc., the method of multi-stage detonation with small equivalent is often used. Multi-stage detonation requires precise control of the delay time, and the expected blasting effect cannot be obtained if the delay time is too long or too short. [0003] Such as figure 1 As shown, it is a schematic diagram of the principle of a digital detonator in the prior art. The digital detonator is connected to the detonator 1 through the power supply and the communication interface, and is connected to the power supply and the detonation signal; the MCU2 of the digital detonator contr...

AI Technical Summary

Problems solved by technology

[0004] For the parameter of precise time delay, due to the particularity of the use environment (extremely wide temperature range -45°C to 100°C, strong blasting vibration), the digital detonator can only use internal vibration, and due to voltage changes, and super The requirement of low power consumption can only use ultra-low chip frequency. Under these constraints, the requirements for the MCU of the digital detonator are very high. For many chips, this parameter has become an unbreakable technical bottleneck.

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