Design and Application of New Well Logging Hoistman Panel
Weibin Cheng · Well Logging Technology · 2004
Introduced is a new well logging hoistman panel with LCD screen,touching screen and combination of Chinese characters and state graphs. The edge transition of pulses from incremental encoder can be detected with double frequency to improve measurement precision, and to avoid measurement errors and accumulative errors. A new timing technique with the variable timing constant is put forward first and used to improve the calculation precision of velocity and simplify the calculations. Power is supplied with AC and DC together ,which can transform one to another automatically . The loss of power supply can be detected so as to save the pulses counter and setting parameters in time . It proves that the new hoistman panel can satisfy all well logging requirements in fields , and is a good substitute for old hoistman panels and imported instruments .