The invention discloses a small-bore gamma-
ray spectra
well logging device as well as a
data acquisition transmission and self-stabilization method. In order to achieve the aim of continuous gamma-
ray spectra
well logging, the small-bore gamma-
ray spectra
well logging device is provided. The small-bore gamma-ray spectra well
logging device comprises a BGO
scintillation crystal probe, a Ba self-stabilization source, a
photomultiplier, a first
amplifier, a pole zero cancellation circuit, a second
amplifier, a
base line restoring circuit, a
high voltage module, a self-stabilization circuit, a sampling hold circuit, a threshold comparing circuit, an A / D conversion circuit, an address latch, a first
microprocessor, a double-port RAM, a second
microprocessor and a time-base circuit, so that the data
throughput rate is improved; a synchronization mechanism is designed between the two microprocessors to guarantee the completeness of a gamma-ray spectra data frame. The data frame is like an FIFO, and the gamma-ray spectra data frame which is written at first by the
microprocessor 1 is taken away from the microprocessor 2 at first; the microprocessor 1 bears high-speed gamma pulse acquisition, functions of data reading, combination
processing, automatic spectra stabilization and the like are realized by the microprocessor 2, and the spectra data are sent to a
ground system through an asynchronous
serial port in real time.