Method, device and circuit for determining energy storage capacitor in electronic detonator

Abstract

The embodiment of the invention relates to the technical field of electronic detonators, in particular to a method, device and circuit for determining an energy storage capacitor in an electronic detonator. The method comprises the steps: enabling the relation between capacitor charging and time to be approximate to a bit linear relation through the micro-conduction time; designing a high-precision clock, so that a host can accurately set the capacitor discharge time t; obtaining the voltage V1 of the capacitor before discharging by using a high-precision digital-to-analog converter; obtaininga voltage V2 after the capacitor is discharged after the capacitor is discharged; and calculating an RC value according to the voltage V1 before discharging, the voltage V2 after discharging and a preset discharging time t. During a specific test, a standard resistor similar to an internal resistor of an ignition head is selected, and a high-precision capacitance value can be simply and conveniently obtained. According to the invention, the capacitance value is calculated by accurately controlling the capacitance time and directly measuring the voltage, and the accuracy of capacitance calculation is improved.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of electronic detonators, in particular to a method, device and circuit for determining an energy storage capacitor in an electronic detonator. Background technique [0002] The electronic detonator is the product of the combination of detonator and integrated circuit technology. It has been widely used at present. The electronic detonator control module generally has a large-capacity energy storage capacitor. The determination of the capacitance value of the energy storage capacitor is very important for detonation. In order to determine the capacity value of the energy storage capacitor, the charging current calculation method is mainly used in the prior art: charge the energy storage capacitor to a predetermined voltage value, measure the charging current during the charging process and the time required to reach the predetermined voltage, and then charge The current calculates the c...

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Problems solved by technology

[0002] The electronic detonator is the product of the combination of detonator and integrated circuit technology. It has been widely used at present. The electronic detonator control module generally has a large-capacity energy storage capacitor. The determination of the capacitance value of the energy storage capacitor is very important for detonation. In order to determine the capacity value of the energy storage capacitor, the charging current calculation method is mainly used in the prior art: charge the energy storage capacitor to a predetermined voltage value, measure the charging current during the charging process and the time required to reach the predetermined voltage, and then charge The current calculates the capacity of the energy storage capacitor; the charging current flow of the electronic detonator is small, about 2mA, and it changes with the change of the capacitor voltage, causing the host to have low accuracy in sampling the current; eventually it will cause the energy storage capacitor The calculation result of the capacity value has a large error

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