Total-stroke and total-space transient electromagnetic device and measuring method

Abstract

The invention relates to a total-stroke and total-space transient electromagnetic device and measuring method. The device comprises a transmitting unit and a multi-channel receiving unit, wherein the transmitting unit and the multi-channel receiving unit are respectively connected with a signal processing unit, the signal processing unit is connected with a main engine through a communication unit, relevant parameters are set through operation software of the main engine, the receiving unit and the transmitting unit jointly achieve field source excitation and complete collection, recording and the like of an induction signal and an excitation source signal, the induction signal and the excitation source signal are transmitted to the main engine through an RS485, and the display, storage, management and the like of the data are achieved. According to the total-stroke and total-space transient electromagnetic device and measuring method, the self-induction and mutual induction influences can be effectively reduced, the signal to noise ratio and the sensitivity are improved, receiving coils can be combined into different types according to the detection requirement, the different detection effects can be obtained, and the judgment on the direction of an abnormal body can be achieved under the total-space situation. The number of detection blind zones can be reduced, the superficial zone detection effect can be improved, an ARM quad-core processer hardware platform is adopted, a special embedded type operation system is configured, and real-time imaging, comparison, judgment and subsequent analysis can be conveniently carried out on the measured data.

Description

[0001] technical field

[0002] The invention relates to the field of geophysical exploration devices and measurement methods, in particular to a whole-process and full-space transient electromagnetic device and a measurement method.

[0003] Background technique

[0004] As we all know, the transient electromagnetic method is also called time-domain electromagnetic method (TEM). It is based on the principle of electromagnetic induction, using an ungrounded coil to send a primary electromagnetic field underground, and using an ungrounded coil to observe the secondary field during the interval of the primary electromagnetic field. The physical property difference analysis of different lithology formations is carried out.

[0005] In the conventional transient electromagnetic method exploration, in order to achieve a certain detection depth, the transmitting and receiving devices often use multi-turn coils. Especially in the exploration in the mine roadway, such as adv...

Examples

Embodiment 1

[0037] Embodiment one: if figure 1 , figure 2 As shown, the present invention includes a host 1 , a transmitting unit 2 , a multi-channel receiving unit 3 , a signal processing unit 4 and a communication unit 9 . Both the transmitting unit 2 and the multi-channel receiving unit 3 are respectively connected with the signal processing unit 4, and the signal processing unit 4 is connected with the host computer 1 through the communication unit. Host 1 is used to set the acquisition parameters and configuration channel parameters, and record, display and manage the received data. It adopts ARM quad-core processor and can analyze data in real time; host 1 is set with multiple channel communication ports 7, which can Receive measurement data synchronously. Transmitting unit 2 includes a multi-frequency transmitter, the first A / D conversion chip and an excitation power supply for supplying power to transmitting coil 5; multi-channel receiving unit 3 includes a preamplifier connec...

Embodiment 2

[0040] Embodiment two: if image 3 As shown, the difference from Embodiment 1 is that the sub-receiving coil and the main and sub-receiving coils are placed in an orthogonal or oblique manner. Wherein, the transmitting coil shares a center point with the main receiving coil and the sub receiving coil, and the sub receiving coil may or may not share a center point with the main receiving coil, the sub receiving coil and the transmitting coil.

Embodiment 3

[0041] Embodiment three: as Figure 4 As shown, the difference from Embodiment 1 is that the receiving coil consists of two parallel receiving coils to form a double receiving coil, that is, the main receiving coil 61 and the auxiliary receiving coil 62, the two receiving coils have the same area and the main receiving coil 61 and the auxiliary receiving coil There is a certain distance between the receiving coils 62; the transmitting coil is placed outside the main receiving coil 61 and has a common center with it.

[0001] technical field

[0002] The invention relates to the field of geophysical exploration devices and measurement methods, in particular to a whole-process and full-space transient electromagnetic device and a measurement method.

[0003] Background technique

[0004] As we all know, the transient electromagnetic method is also called time-domain electromagnetic method (TEM). It is based on the principle of electromagnetic induction, using an ungrounded coil to send a primary electromagnetic field underground, and using an ungrounded coil to observe the secondary field during the interval of the primary electromagnetic field. The physical property difference analysis of different lithology formations is carried out.

[0005] In the conventional transient electromagnetic method exploration, in order to achieve a certain detection depth, the transmitting and receiving devices often use multi-turn coils. Especially in the exploration in the mine roadway, such as adv...

Examples

Embodiment 1

[0037] Embodiment one: if figure 1 , figure 2 As shown, the present invention includes a host 1 , a transmitting unit 2 , a multi-channel receiving unit 3 , a signal processing unit 4 and a communication unit 9 . Both the transmitting unit 2 and the multi-channel receiving unit 3 are respectively connected with the signal processing unit 4, and the signal processing unit 4 is connected with the host computer 1 through the communication unit. Host 1 is used to set the acquisition parameters and configuration channel parameters, and record, display and manage the received data. It adopts ARM quad-core processor and can analyze data in real time; host 1 is set with multiple channel communication ports 7, which can Receive measurement data synchronously. Transmitting unit 2 includes a multi-frequency transmitter, the first A / D conversion chip and an excitation power supply for supplying power to transmitting coil 5; multi-channel receiving unit 3 includes a preamplifier connec...

Embodiment 2

[0040] Embodiment two: if image 3 As shown, the difference from Embodiment 1 is that the sub-receiving coil and the main and sub-receiving coils are placed in an orthogonal or oblique manner. Wherein, the transmitting coil shares a center point with the main receiving coil and the sub receiving coil, and the sub receiving coil may or may not share a center point with the main receiving coil, the sub receiving coil and the transmitting coil.

Embodiment 3

[0041] Embodiment three: as Figure 4 As shown, the difference from Embodiment 1 is that the receiving coil consists of two parallel receiving coils to form a double receiving coil, that is, the main receiving coil 61 and the auxiliary receiving coil 62, the two receiving coils have the same area and the main receiving coil 61 and the auxiliary receiving coil There is a certain distance between the receiving coils 62; the transmitting coil is placed outside the main receiving coil 61 and has a common center with it.

Images