CN102183341A - Nuclear magnetic resonance detection meter and detection method of hidden troubles of dam leakage - Google Patents
Nuclear magnetic resonance detection meter and detection method of hidden troubles of dam leakage Download PDFInfo
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Abstract
本发明涉及一种核磁共振堤坝渗漏隐患探测仪及探测方法。由计算机经通讯控制器连接发射控制器和接收控制器，发射控制器经发射电路、大功率电源与发射桥路连接，接收控制器与第N采集单元连接，第一采集单元～第N采集单元串联连接，并与其相对应的第一接收线圈～第N接收线圈连接。在坝顶铺设多匝的长方形发射线圈，用接收线圈进行接收，接收线圈中采集到核磁共振响应信号即可证明堤坝存在渗漏，数据处理后绘制堤坝含水图确定渗漏位置。利用核磁共振探测坝渗漏隐患，直接测量堤坝内部水含量，更精准的确定坝渗漏位置；最大限度的减少在检测中队堤坝的破坏，不增加新的安全隐患；整个测试完全在坝顶进行，便于检测操作。
The invention relates to a nuclear magnetic resonance dam leakage hidden danger detector and a detection method. The computer is connected to the transmitting controller and the receiving controller through the communication controller, the transmitting controller is connected to the transmitting bridge through the transmitting circuit and the high-power power supply, the receiving controller is connected to the Nth acquisition unit, the first acquisition unit to the Nth acquisition unit connected in series, and connected to the corresponding first to Nth receiving coils. A multi-turn rectangular transmitting coil is laid on the top of the dam, and the receiving coil is used for reception. The nuclear magnetic resonance response signal collected in the receiving coil can prove the leakage of the dam. After data processing, the water content map of the dam is drawn to determine the location of the leakage. Use nuclear magnetic resonance to detect hidden dangers of dam leakage, directly measure the water content inside the dam, and more accurately determine the location of dam leakage; minimize the damage to the dam in the inspection squadron, and do not increase new safety hazards; the entire test is completely carried out on the top of the dam , to facilitate the detection operation.
Description
技术领域technical field
本发明涉及一种用于水利工程的地球物理探测设备，尤其是基于核磁共振技术实现的堤坝渗漏隐患探测装置及探测方法。The invention relates to geophysical detection equipment used in water conservancy projects, in particular to a detection device and detection method for hidden dangers of dam leakage based on nuclear magnetic resonance technology.
背景技术Background technique
核磁共振地下水探测方法(Magnetic Resonance Sounding，简称MRS方法)是一种直接地非破坏性的地球物理勘探方法。Magnetic Resonance Sounding (MRS for short) is a direct and non-destructive geophysical exploration method.
CN101858991A公开了一种以温度为示踪剂探测的堤坝渗漏通道位置的系统及方法，该发明的系统包括N个温度传感器、信号获取装置、信号融合处理装置、控制系统以及数据终端装置；其中N个温度传感器均匀分布设置在堤坝的坝体内，分别与信号获取装置连接，信号获取装置、信号融合处理装置、控制系统以及数据终端装置一次串接。由控制系统控制网络节点切换，实施温度传感器的循环检测，通过测量钻孔中水的温度来判断堤坝体的温度分布情况，从而实现整个堤坝断面的温度探测。通过采集温度数据，进一步进行处理，绘制等温线图，来完成对堤坝渗漏位置的确定。CN1241718A公开了一种集中电流场的堤坝渗漏检测仪及测量的方法。本发明主要是在水中测量，通过一种特殊的电流场分布来探测堤坝有水一侧的漏水位置。以上发明通过温度探测和电流场探测，完成对堤坝渗漏位置的确定，但都存在不足。如利用温度测量时，为判断坝体的温度分布，就要在坝体上进行多次钻孔，对坝体造成损坏，形成安全隐患。通过电流场检测来确定堤坝渗漏位置，则需要在水中进行测量，在设备防水性设计及具体实施存在一定难度。最重要的是这两种方法都是对堤坝渗漏位置间接探测方法，存在一定的不准确性。CN101858991A discloses a system and method for detecting the position of a dam leakage channel using temperature as a tracer. The system of the invention includes N temperature sensors, a signal acquisition device, a signal fusion processing device, a control system and a data terminal device; N temperature sensors are evenly distributed in the dam body of the embankment, and are respectively connected to the signal acquisition device, and the signal acquisition device, the signal fusion processing device, the control system and the data terminal device are connected in series at one time. The control system controls the switching of network nodes, implements the cyclic detection of the temperature sensor, and judges the temperature distribution of the dam body by measuring the temperature of the water in the borehole, so as to realize the temperature detection of the entire dam section. By collecting temperature data, further processing, drawing isotherm map, to complete the determination of the location of the dam seepage. CN1241718A discloses a dam leakage detector with a concentrated current field and a measurement method. The invention mainly measures in water, and detects the water leakage position on the water side of the embankment through a special current field distribution. The above inventions complete the determination of the leakage position of the embankment through temperature detection and current field detection, but all have deficiencies. If temperature measurement is used, in order to judge the temperature distribution of the dam body, it is necessary to carry out multiple drillings on the dam body, causing damage to the dam body and forming a safety hazard. To determine the location of dam leakage through current field detection, it needs to be measured in water, and there are certain difficulties in the waterproof design and implementation of equipment. The most important thing is that these two methods are indirect detection methods for the leakage position of the embankment, and there are certain inaccuracies.
发明内容Contents of the invention
本发明的目的就是针对上述现有技术的不足，提供一种核磁共振堤坝渗漏隐患探测仪；Purpose of the present invention is exactly at above-mentioned deficiencies in the prior art, a kind of nuclear magnetic resonance dam leakage hidden danger detector is provided;
本发明的另一目的是提供一种核磁共振堤坝渗漏隐患探测方法。Another object of the present invention is to provide a method for detecting hidden dangers of nuclear magnetic resonance dam leakage.
本发明的目的是通过以下技术方案实现的：The purpose of the present invention is achieved through the following technical solutions:
计算机1经过串口线或网线与通讯控制器连接2，通讯控制器2分别与发射控制器3、接收控制器4连接，发射控制器3经发射电路5、大功率电源6与发射桥路7连接，发射电路5与发射桥路7连接，配谐电容8经发射桥路7与发射线圈9连接，接收控制器4与第N采集单元连接，第一采集单元～第N采集单元串联连接，第一采集单元～第N采集单元与其相对应的第一接收线圈～第N接收线圈连接。The computer 1 is connected to the communication controller 2 through a serial cable or network cable, the communication controller 2 is connected to the transmitting controller 3 and the receiving controller 4 respectively, and the transmitting controller 3 is connected to the transmitting bridge 7 through the transmitting circuit 5 and the high-power power supply 6 , the transmitting circuit 5 is connected to the transmitting bridge 7, the matching capacitor 8 is connected to the transmitting
第一采集单元～第N采集单元的通讯接口电路22通过串口线或者网线与相邻的采集单元中的通讯接口22相连接，通讯接口电路22经同步控制电路23、继电器电路24、谐振电路25、放大器电路26、采集电路27依次与通讯接口电路22连接构成。The communication interface circuits 22 of the first acquisition unit to the Nth acquisition unit are connected with the communication interface 22 in the adjacent acquisition unit through a serial port line or a network cable, and the communication interface circuit 22 is through a synchronous control circuit 23, a relay circuit 24, and a resonant circuit 25 , the amplifier circuit 26 and the acquisition circuit 27 are sequentially connected with the communication interface circuit 22 to form.
核磁共振堤坝渗漏隐患探测仪的探测方法，包括以下顺序和步骤：The detection method of the nuclear magnetic resonance dam leakage hidden danger detector includes the following sequence and steps:
a、根据堤坝顶部形状，铺设一个多匝长方形或正方形的大线圈作为发射线圈9，尽量覆盖全部探测坝顶；a, according to the shape of the top of the embankment, lay a multi-turn rectangular or square large coil as the
b、在发射线圈9中，等间距铺设第一接收线圈～第N接收线圈和与第一接收线圈～第N接收线圈相对应的第一采集单元～第N采集单元；b. In the transmitting
c、用磁力仪获取当地磁场的强度，转化为拉莫尔频率，在计算机1中进行相应的设置。根据拉莫尔频率和发射线圈的电感特性，计算发射桥路7的配谐电容8的大小；c. Use a magnetometer to obtain the strength of the local magnetic field, convert it into a Larmor frequency, and perform corresponding settings in the computer 1 . According to the Larmor frequency and the inductance characteristics of the transmitting coil, calculate the size of the matching capacitor 8 of the transmitting bridge 7;
d、根据堤坝高度，在计算机1中设置多个发射脉冲距。发射脉冲距是发射电流和发射时间的乘积，在通常情况下，发射时间是固定的，发射电流越大，探测深度越大，设置从大到小的激发脉冲距可以实现对坝基从下到上的分层探测；d. According to the height of the embankment, a plurality of emission pulse distances are set in the computer 1 . The emission pulse distance is the product of emission current and emission time. Under normal circumstances, the emission time is fixed. The greater the emission current, the greater the detection depth. Setting the excitation pulse distance from large to small can realize the inspection of the dam foundation from bottom to top. Hierarchical detection;
e、依照设置的发射脉冲距，设置大功率电源6的电压值，在发射线圈9中产生大功率的交变电流，发射时间通常设置为40ms；e. According to the set transmission pulse distance, set the voltage value of the high-power power supply 6 to generate a high-power alternating current in the
f、发射完成后，经过一段死区时间，接收控制器4向采集单元16～21发射同步采集命令，第一采集单元～第N采集单元采集完第一接收线圈～第N接收线圈信号后，将采集数据返回至接收控制器4，完成一次探测工作；f. After the transmission is completed, after a period of dead time, the receiving controller 4 transmits a synchronous acquisition command to the acquisition units 16-21. After the first acquisition unit to the Nth acquisition unit have collected the signals of the first receiver coil to the Nth receiver coil, Return the collected data to the receiving controller 4 to complete a detection work;
g、为了降低噪声，提高接收信号的信噪比，多次重复步骤e和步骤f，将采集到的数据分别进行叠加处理，直至全部探测工作完成；g. In order to reduce noise and improve the signal-to-noise ratio of the received signal, repeat step e and step f several times, and superimpose the collected data until all the detection work is completed;
h、将采集数据进行反演解释后绘出堤坝坝基函数图，确定渗漏点的位置，完成堤坝渗漏隐患的探测。h. After inversion and interpretation of the collected data, draw the dam foundation function diagram, determine the location of the leakage point, and complete the detection of the hidden danger of the dam leakage.
有益效果：Beneficial effect:
用核磁共振技术对堤坝渗漏隐患探测。实现了对堤坝渗漏位置的直接测量，提高了坝渗漏隐患探测的精度，并且在坝顶平铺设备进行测量减少了对坝体的损坏，降低了堤坝破坏，提高了探测操作效率，增强了探测可实施性。Use nuclear magnetic resonance technology to detect hidden dangers of dam leakage. Realized the direct measurement of the leakage position of the dam, improved the accuracy of detection of hidden dangers of dam leakage, and measured on the top of the dam to reduce the damage to the dam body, reduce the damage of the dam, improve the efficiency of detection operations, and enhance To detect the implementability.
附图及附图说明Drawings and Description of Drawings
图1是核磁共振堤坝渗漏隐患探测仪的结构框图Figure 1 is a structural block diagram of the nuclear magnetic resonance dam leakage hidden danger detector
图2是附图1中采集单元的结构框图Fig. 2 is the structural block diagram of acquisition unit in accompanying drawing 1
1计算机，2通讯控制器，3发射控制器，4接收控制器，5发射电路，6大功率电源，7发射桥路，8配谐电容，9发射线圈，22通讯接口电路，23同步控制电路，24继电器电路，25谐振电路，26放大器电路，27采集电路。1 computer, 2 communication controller, 3 transmitting controller, 4 receiving controller, 5 transmitting circuit, 6 high-power power supply, 7 transmitting bridge, 8 matching capacitor, 9 transmitting coil, 22 communication interface circuit, 23 synchronous control circuit , 24 relay circuit, 25 resonant circuit, 26 amplifier circuit, 27 acquisition circuit.
具体实施方式Detailed ways
下面结合附图和实施例作进一步详细说明：Below in conjunction with accompanying drawing and embodiment describe in further detail:
计算机1经过串口线或网线与通讯控制器连接2，通讯控制器2分别与发射控制器3、接收控制器4连接，发射控制器3经发射电路5、大功率电源6与发射桥路7连接，发射电路5与发射桥路7连接，配谐电容8经发射桥路7与发射线圈9连接，接收控制器4与第N采集单元连接，第一采集单元～第N采集单元串联连接，第一采集单元～第N采集单元与其相对应的第一接收线圈～第N接收线圈连接。The computer 1 is connected to the communication controller 2 through a serial cable or network cable, the communication controller 2 is connected to the transmitting controller 3 and the receiving controller 4 respectively, and the transmitting controller 3 is connected to the transmitting bridge 7 through the transmitting circuit 5 and the high-power power supply 6 , the transmitting circuit 5 is connected to the transmitting bridge 7, the matching capacitor 8 is connected to the transmitting
第一采集单元～第N采集单元的通讯接口电路22通过串口线或者网线与相邻的采集单元中的通讯接口22相连接，通讯接口电路22经同步控制电路23、继电器电路24、谐振电路25、放大器电路26、采集电路27依次与通讯接口电路22连接构成。The communication interface circuits 22 of the first acquisition unit to the Nth acquisition unit are connected with the communication interface 22 in the adjacent acquisition unit through a serial port line or a network cable, and the communication interface circuit 22 is through a synchronous control circuit 23, a relay circuit 24, and a resonant circuit 25 , the amplifier circuit 26 and the acquisition circuit 27 are sequentially connected with the communication interface circuit 22 to form.
核磁共振堤坝渗漏隐患探测仪的探测方法，包括以下顺序和步骤：The detection method of the nuclear magnetic resonance dam leakage hidden danger detector includes the following sequence and steps:
a、根据堤坝顶部形状，铺设一个多匝长方形或正方形的大线圈作为发射线圈9，尽量覆盖全部探测坝顶；a, according to the shape of the top of the embankment, lay a multi-turn rectangular or square large coil as the
b、在发射线圈9中，等间距铺设第一接收线圈～第N接收线圈和与第一接收线圈～第N接收线圈相对应的第一采集单元～第N采集单元；b. In the transmitting
c、用磁力仪获取当地磁场的强度，转化为拉莫尔频率，在计算机1中进行相应的设置，根据拉莫尔频率和发射线圈的电感特性，计算发射桥路7的配谐电容8的大小；c. Obtain the strength of the local magnetic field with a magnetometer, convert it into Larmor frequency, and make corresponding settings in the computer 1, and calculate the matching capacitor 8 of the transmitting bridge 7 according to the Larmor frequency and the inductance characteristics of the transmitting coil. size;
d、根据堤坝高度，在计算机1中设置多个发射脉冲距。发射脉冲距是发射电流和发射时间的乘积，在通常情况下，发射时间是固定的，发射电流越大，探测深度越大，设置从大到小激发脉冲距可以实现对坝基从下到上的分层探测；d. According to the height of the embankment, a plurality of emission pulse distances are set in the computer 1 . The emission pulse distance is the product of the emission current and the emission time. Under normal circumstances, the emission time is fixed. The greater the emission current, the greater the detection depth. Setting the excitation pulse distance from large to small can realize the inspection of the dam foundation from bottom to top. Hierarchical detection;
e、依照设置的发射脉冲距，设置大功率电源6的电压值，在发射线圈9中产生大功率的交变电流，发射时间通常设置为40ms；e. According to the set transmission pulse distance, set the voltage value of the high-power power supply 6 to generate a high-power alternating current in the
f、发射完成后，经过一段死区时间，接收控制器4向第一采采集单元～N采集单元发射同步采集命令，第一采集单元～第N采集单元采集完第一接收线圈～第N接收线圈信号后，将采集数据返回至接收控制器4，完成一次探测工作；f. After the transmission is completed, after a period of dead time, the receiving controller 4 sends a synchronous collection command to the first collection unit ~ N collection unit, and the first collection unit ~ N collection unit collects the first reception coil ~ N reception After the coil signal, the collected data is returned to the receiving controller 4 to complete a detection work;
g、为了降低噪声，提高接收信号的信噪比，多次重复步骤e和步骤f，将采集到的数据分别进行叠加处理，直至全部探测工作完成；g. In order to reduce noise and improve the signal-to-noise ratio of the received signal, repeat step e and step f several times, and superimpose the collected data until all the detection work is completed;
h、将采集数据进行反演解释后绘出堤坝坝基函数图，确定渗漏点位置，完成堤坝渗漏隐患的探测。h. After inversion and interpretation of the collected data, draw the dam foundation function diagram, determine the location of the leakage point, and complete the detection of the hidden danger of the dam leakage.
实施例1Example 1
计算机1经过串口线或网线与通讯控制器连接2，通讯控制器2分别与发射控制器3、接收控制器4连接，发射控制器3经发射电路5、大功率电源6与发射桥路7连接，发射电路5与发射桥路7连接，配谐电容8经发射桥路7与发射线圈9连接，接收控制器4与第N采集单元连接，第一采集单元～第N采集单元串联连接，第一采集单元～第N采集单元与其相对应的第一接收线圈～第N接收线圈连接。The computer 1 is connected to the communication controller 2 through a serial cable or network cable, the communication controller 2 is connected to the transmitting controller 3 and the receiving controller 4 respectively, and the transmitting controller 3 is connected to the transmitting bridge 7 through the transmitting circuit 5 and the high-power power supply 6 , the transmitting circuit 5 is connected to the transmitting bridge 7, the matching capacitor 8 is connected to the transmitting
第一采集单元～第N采集单元的通讯接口电路22通过串口线或者网线与相邻的采集单元中的通讯接口22相连接，通讯接口电路22经同步控制电路23、继电器电路24、谐振电路25、放大器电路26、采集电路27依次与通讯接口电路22连接构成。The communication interface circuits 22 of the first acquisition unit to the Nth acquisition unit are connected with the communication interface 22 in the adjacent acquisition unit through a serial port line or a network cable, and the communication interface circuit 22 is through a synchronous control circuit 23, a relay circuit 24, and a resonant circuit 25 , the amplifier circuit 26 and the acquisition circuit 27 are sequentially connected with the communication interface circuit 22 to form.
核磁共振堤坝渗漏隐患探测仪的探测方法，包括以下顺序和步骤：The detection method of the nuclear magnetic resonance dam leakage hidden danger detector includes the following sequence and steps:
a、根据堤坝顶部形状和坝长，铺设一个多匝长方形的大线圈作为发射线圈9，发射线圈9尽可能覆盖全部探测坝顶；a, according to the shape of the top of the embankment and the length of the dam, a multi-turn rectangular large coil is laid as the transmitting
b、在发射线圈9中，等间距铺设第一接收线圈～第N接收线圈和与第一接收线圈～第N接收线圈相对应的第一采集单元～第N采集单元；b. In the transmitting
c、用磁力仪获取当地磁场的强度，转化为拉莫尔频率，在计算机1中进行相应的设置，根据拉莫尔频率和发射线圈的电感特性，计算发射桥路7的配谐电容8的大小；c. Obtain the strength of the local magnetic field with a magnetometer, convert it into Larmor frequency, and make corresponding settings in the computer 1, and calculate the matching capacitor 8 of the transmitting bridge 7 according to the Larmor frequency and the inductance characteristics of the transmitting coil. size;
d、根据堤坝高度，在计算机1中设置多个发射脉冲距。发射脉冲距是发射电流和发射时间的乘积，在通常情况下，发射时间是固定的，发射电流越大，探测深度越大，设置从大到小激发脉冲距可以实现对坝基从下到上的分层探测；d. According to the height of the embankment, a plurality of emission pulse distances are set in the computer 1 . The emission pulse distance is the product of the emission current and the emission time. Under normal circumstances, the emission time is fixed. The greater the emission current, the greater the detection depth. Setting the excitation pulse distance from large to small can realize the inspection of the dam foundation from bottom to top. Hierarchical detection;
e、依照设置的发射脉冲距，设置大功率电源6的电压值，在发射线圈9中产生大功率的交变电流，发射时间通常设置为40ms；e. According to the set transmission pulse distance, set the voltage value of the high-power power supply 6 to generate a high-power alternating current in the
f、发射完成后，经过一段死区时间，接收控制器4向第一采采集单元～N采集单元发射同步采集命令，第一采集单元～第N采集单元采集完第一接收线圈～第N接收线圈信号后，将采集数据返回至接收控制器4，完成一次探测工作；f. After the transmission is completed, after a period of dead time, the receiving controller 4 sends a synchronous collection command to the first collection unit ~ N collection unit, and the first collection unit ~ N collection unit collects the first reception coil ~ N reception After the coil signal, the collected data is returned to the receiving controller 4 to complete a detection work;
g、为了降低噪声，提高接收信号的信噪比，多次重复步骤e和步骤f，将采集到的数据分别进行叠加处理，直至全部探测工作完成；g. In order to reduce noise and improve the signal-to-noise ratio of the received signal, repeat step e and step f several times, and superimpose the collected data until all the detection work is completed;
h、将采集数据进行反演解释后绘出堤坝坝基函数图，确定渗漏点位置，完成堤坝渗漏隐患的探测。h. After inversion and interpretation of the collected data, draw the dam foundation function diagram, determine the location of the leakage point, and complete the detection of the hidden danger of the dam leakage.
实施例2Example 2
计算机1经过串口线或网线与通讯控制器连接2，通讯控制器2分别与发射控制器3、接收控制器4连接，发射控制器3经发射电路5、大功率电源6与发射桥路7连接，发射电路5与发射桥路7连接，配谐电容8经发射桥路7与发射线圈9连接，接收控制器4与第N采集单元连接，第一采集单元～第N采集单元串联连接，第一采集单元～第N采集单元与其相对应的第一接收线圈～第N接收线圈连接。The computer 1 is connected to the communication controller 2 through a serial cable or network cable, the communication controller 2 is connected to the transmitting controller 3 and the receiving controller 4 respectively, and the transmitting controller 3 is connected to the transmitting bridge 7 through the transmitting circuit 5 and the high-power power supply 6 , the transmitting circuit 5 is connected to the transmitting bridge 7, the matching capacitor 8 is connected to the transmitting
第一采集单元～第N采集单元的通讯接口电路22通过串口线或者网线与相邻的采集单元中的通讯接口22相连接，通讯接口电路22经同步控制电路23、继电器电路24、谐振电路25、放大器电路26、采集电路27依次与通讯接口电路22连接构成。The communication interface circuits 22 of the first acquisition unit to the Nth acquisition unit are connected with the communication interface 22 in the adjacent acquisition unit through a serial port line or a network cable, and the communication interface circuit 22 is through a synchronous control circuit 23, a relay circuit 24, and a resonant circuit 25 , the amplifier circuit 26 and the acquisition circuit 27 are sequentially connected with the communication interface circuit 22 to form.
核磁共振堤坝渗漏隐患探测仪的探测方法，包括以下顺序和步骤：The detection method of the nuclear magnetic resonance dam leakage hidden danger detector includes the following sequence and steps:
a、根据堤坝顶部形状或坝长，铺设一个多匝正方形的大线圈作为发射线圈9，尽量覆盖全部探测坝顶；a, according to the shape of the top of the dam or the length of the dam, lay a large coil with multiple turns of the square as the transmitting
b、在发射线圈9中，等间距铺设第一接收线圈～第N接收线圈和与第一接收线圈～第N接收线圈相对应的第一采集单元～第N采集单元；b. In the transmitting
c、用磁力仪获取当地磁场的强度，转化为拉莫尔频率，在计算机1中进行相应的设置，根据拉莫尔频率和发射线圈的电感特性，计算发射桥路7的配谐电容8的大小；c. Obtain the strength of the local magnetic field with a magnetometer, convert it into Larmor frequency, and make corresponding settings in the computer 1, and calculate the matching capacitor 8 of the transmitting bridge 7 according to the Larmor frequency and the inductance characteristics of the transmitting coil. size;
d、根据堤坝高度，在计算机1中设置多个发射脉冲距。发射脉冲距是发射电流和发射时间的乘积，在通常情况下，发射时间是固定的，发射电流越大，探测深度越大，设置从大到小激发脉冲距可以实现对坝基从下到上的分层探测；d. According to the height of the embankment, a plurality of emission pulse distances are set in the computer 1 . The emission pulse distance is the product of the emission current and the emission time. Under normal circumstances, the emission time is fixed. The greater the emission current, the greater the detection depth. Setting the excitation pulse distance from large to small can realize the inspection of the dam foundation from bottom to top. Hierarchical detection;
e、依照设置的发射脉冲距，设置大功率电源6的电压值，在发射线圈9中产生大功率的交变电流，发射时间通常设置为40ms；e. According to the set transmission pulse distance, set the voltage value of the high-power power supply 6 to generate a high-power alternating current in the
f、发射完成后，经过一段死区时间，接收控制器4向第一采采集单元～N采集单元发射同步采集命令，第一采集单元～第N采集单元采集完第一接收线圈～第N接收线圈信号后，将采集数据返回至接收控制器4，完成一次探测工作；f. After the transmission is completed, after a period of dead time, the receiving controller 4 sends a synchronous collection command to the first collection unit ~ N collection unit, and the first collection unit ~ N collection unit collects the first reception coil ~ N reception After the coil signal, the collected data is returned to the receiving controller 4 to complete a detection work;
g、为了降低噪声，提高接收信号的信噪比，多次重复步骤e和步骤f，将采集到的数据分别进行叠加处理，直至全部探测工作完成；g. In order to reduce noise and improve the signal-to-noise ratio of the received signal, repeat step e and step f several times, and superimpose the collected data until all the detection work is completed;
h、将采集数据进行反演解释后绘出堤坝坝基函数图，确定渗漏点位置，完成堤坝渗漏隐患的探测。h. After inversion and interpretation of the collected data, draw the dam foundation function diagram, determine the location of the leakage point, and complete the detection of the hidden danger of the dam leakage.
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| CN109782357A (en) * | 2019-02-18 | 2019-05-21 | 水利部交通运输部国家能源局南京水利科学研究院 | A combined method of ground magnetic resonance method and high-density electrical method to detect leakage of embankment |
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| CN111855086B (en) * | 2020-07-06 | 2021-09-07 | 吉林大学 | On-line monitoring device and method for leakage of dam with prepolarized field nuclear magnetic resonance |
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