Coding method and encoder for oil drilling drawworks equipment

Abstract

The invention discloses an encoding method for oil drilling winch equipment and an encoder of the encoding method. Six paths of encoded signals of which the relative time delay is strictly a trigger clock period are constructed to perform logic judgment and encoding to realize an octonary high-accuracy encoding algorithm, and the octonary measuring accuracy is higher than 0.01 Hz. A wireless encoder using the encoding method comprises a pulse frequency measurement module, a microprocessor module, a communication module and a power module, wherein the encoding frequency measurement module comprises a voltage isolating unit and a pulse frequency measurement metering unit; the microprocessor module comprises a single-chip microprocessor low-power-consumption MCU (Micro Controller Unit), an electrically erasable programmable read-only mass memory EEPROM, a clock circuit and a dial switch; the communication module comprises an RS485 communication serial port and a wireless interface. The wireless encoder has the advantages of flexibility in encoding, high testing accuracy, good reliability, high integration, small size and low power consumption of the encoder, easiness in arrangement and maintenance, capability of reducing the manual workload of drilling sites and normal practical value.

Description

technical field [0001] The invention belongs to the technical field of oil drilling equipment detection, and relates to an encoding method for oil drilling drawworks equipment and an encoder thereof, in particular to an encoding method and an encoder for oil drilling drawworks equipment based on octave frequency counting. Background technique [0002] Oil drilling is an important step in the exploitation of oil and gas resources, and its input costs account for more than 50% of the total investment in oil exploration and development. In the drilling engineering, it is necessary to monitor the drilling fluid, the working status of various instruments and equipment through the logging equipment, and analyze and process the information to achieve auxiliary services such as finding and evaluating petroleum gas resources, tracking the well construction process in real time, and monitoring and predicting downhole failures. The role of drilling production and management. Winch equ...

AI Technical Summary

Problems solved by technology

[0004] In addition, the encoder usually uses discrete components and some gate circuits to realize multi-frequency measurement of the encoded signal, which uses many components and the circuit stability is not good; while the circuit design using integrated chips often directly connects the encoded signal to the microcontroller (hereinafter referred to as the MCU) input terminal, and then the software completes the work of phase identification and counting, which increases the burden on the MCU and is prone to omission or miscalculation

In addition, according to actual engineering needs, the currently used encoders are generally limited to quadruple frequency measurement and counting, the counting accuracy needs to be improved, and the counting algorithm needs to be optimized

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