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Abstract: A patented technology for bus current acquisition of electronic detonators is introduced, which uses a low-cost hardware solution to achieve high-precision and wide-range current acquisition. This technology is designed to monitor and acquire data related to the working current, communication current, charging current, and detonator bus current load for electronic detonators, thus enabling these devices' status monitoring, data communication, and bus protection. This system focuses on the innovative, low-cost circuit design concept and the methods employed to ensure high-precision, high-resolution, and wide-range current acquisition. The typical working current of the electronic detonator control module ranges between 10~30 uA, and data is transmitted to the detonation controller via a current carrier. The communication current typically falls within the 0.5~2 mA range, and the ignition energy storage capacitor is charged through the bus with a peak charging current of 1~2 mA. The detonation controller determines the working status of the electronic control module by acquiring bus current data, which includes communication and charging status, to determine the module's working condition. In the current acquisition method discussed, low-side resistors are used to sample the current, replacing a differential comparator with three low-cost operational amplifiers. Furthermore, a 12 bit AD converter integrated into the MCU replaces an external 16-bit AD converter, which reduces hardware costs by over 80%. By segmenting the current collection, the system maintains the required accuracy for small current sampling and expands the current sampling range by 30 times, covering the rated current of the bus. The absence of an external AD conversion module significantly improves the sampling efficiency.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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