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过去我们在磁屏蔽室内用磁通门磁强计对气功磁信号进行了动态研究,发现在气功态下气功师的磁信号频率一般在2Hz 以下,振幅为几个nT(T 为特斯拉,磁通量密度单位,1nT=10~(-9)T)到10~5nT。由于人体磁信号为弱磁信号,为了更好地了解动态特征,本文用超导生物磁强计进行测量。超导生物磁强计的优点是频响范围宽,从DC～1kHz(磁通门磁强计为DC～10Hz);灵敏度高。人体磁信号经磁带记录,然后用计算机进行频功谱分析。实验对象为20人38人次,分为两组,一组为对照组(未练过气功)7人次,平均年龄为46.3岁,另一组为练功组(练功时间1～20年)17人31人次,平均年龄为48.3岁。实验程序为被试者在进入磁屏蔽室以前要除去随身携带的一切磁性物体,然后进入磁屏蔽室内,将所测穴对准探头。实验开始后连续记录发功前、发功中和收功后(各3min)磁信号的动态变化。磁信号用美国BTI 公司的M-601型超导生物磁强计进行测量,并用日本TEAC 公司MR-30C 型七导磁带机进行记录。数据处理用日本三荣7T17-S 型信号处理机作频功谱分析,文中所述及的功率变化均为相对值变化。结果表明,在练功组31人次的测试中能测到磁信号的有24人次(占77.4%),测不到磁信号的有7人次(占22.6%)。从不同穴位(劳宫穴、百会穴和印堂穴)测到磁信号的24人次中,<1Hz 的信号出现17次,占70.8%,3Hz 的信号出现4次,占16.7%。<2kHZ 的信号出现3次,占12.5%,<1Hz 的信号为主要磁信号。在发功中还看到三种功率变化,功率变大的有13人次,功率减小的有11人次,功率无变化的有7人次。此外,在12人次中见到发功中的频谱变化现象。发功过程中发现磁信号减小及发生频谱变化是两种新现象。收功后不同穴位呈现后效应者在24人次中有18人次.占75%。不同穴位磁信号变化可以得到很好重复。文中对三种不同磁信号的可能来源进行了讨论。
In the past, we used a fluxgate magnetometer to study the dynamic characteristics of QIG signals in a magnetically shielded room. We found that the frequency of the Qigong magnetic signal is below 2 Hz and the amplitude is a few nT (T is Tesla, Magnetic flux density unit, 1nT = 10 ~ (-9) T) to 10 ~ 5nT. Since the human magnetic signal is a weak magnetic signal, in order to better understand the dynamic characteristics, this article uses the superconducting biological magnetometer to measure. The advantages of superconducting bio-magnetometer is a wide frequency response range from DC ~ 1kHz (fluxgate magnetometer DC ~ 10Hz); high sensitivity. Human magnetic signal recorded by the tape, and then use the computer for frequency spectrum analysis. The subjects were 20 people and 38 persons. They were divided into two groups. One group was control group (qigong was not practiced), the average age was 46.3 years old, and the other group was practice group (exercise time was 1 ~ 20 years). The average age is 48.3 years old. Experimental procedures for the subjects before entering the magnetic shield room to remove all carry magnetic objects, and then enter the magnetic shield room, the measured hole alignment probe. After the start of the experiment, the dynamic changes of the magnetic signal before and after the start-up and post-start-up were respectively recorded (each 3 min). The magnetic signal was measured with M-601 type superconducting magnetometer from BTI Company of America and recorded with MR-30C seven-lead tape drive manufactured by Japan TEAC Corporation. Data processing Japan’s Sanyo 7T17-S-type signal processing for frequency spectrum analysis, the power changes described in the text are relative changes. The results showed that there were 24 magnetic signals (77.4%) and no magnetic signals (22.6%) in 31 tests. Of the 24 people who measured magnetic signals at different acupoints (Labong Point, Baihui Point and Yin Tang Point), signals of <1 Hz appeared 17 times, accounting for 70.8%, and signals of 3 Hz appeared 4 times, accounting for 16.7%. <2kHZ signal appears three times, accounting for 12.5%, <1Hz signal as the main magnetic signal. In the hair work also saw three kinds of power changes, the power becomes larger 13 people, the power reduction of 11 people, there is no change in power 7 people. In addition, we saw the change of spectrum in our work during 12 sessions. It is found that the decrease of magnetic signal and the occurrence of spectral changes during the process of hair work are two new phenomena. After the receipt of different acupuncture points after the effect of those 24 people in 18 people, accounting for 75%. Different points of magnetic signal changes can be well repeated. The possible sources of three different magnetic signals are discussed in this paper.