CN213023323U - A nuclear magnetic resonance water detector current acquisition device - Google Patents
A nuclear magnetic resonance water detector current acquisition device Download PDFInfo
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- CN213023323U CN213023323U CN202021612008.0U CN202021612008U CN213023323U CN 213023323 U CN213023323 U CN 213023323U CN 202021612008 U CN202021612008 U CN 202021612008U CN 213023323 U CN213023323 U CN 213023323U
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- 238000005481 NMR spectroscopy Methods 0.000 title claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 238000012545 processing Methods 0.000 claims abstract description 27
- 238000001514 detection method Methods 0.000 claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 239000003990 capacitor Substances 0.000 claims description 10
- 241000921268 Selago corymbosa Species 0.000 claims description 6
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical group [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 3
- 230000002401 inhibitory effect Effects 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 239000003673 groundwater Substances 0.000 abstract description 3
- 230000007774 longterm Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
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- Measurement Of Current Or Voltage (AREA)
Abstract
本实用新型属于核磁共振地下水探测技术领域，尤其涉及一种核磁共振找水仪电流采集装置，包括：电流检测模块，用于交流电流信号的检测，将大电流信号转换为小电流信号；滤波电路模块，对检测到的电流进行平整波形，衰减或抑制干扰成分；A/D转换模块，将采集到的模拟电流信号转换为数字电流信号；中央处理单元模块，作为信号采集处理模块，将处理后的电流信号传送至PC机；最小系统控制模块，包括时钟电路和复位电路，主要是对单片机进行控制，以保持单片机正常稳定的工作。本电流采集装置体积小，重量轻，更为重要的是功耗低，数据采集结果可靠，有利于野外的长时间工作，大大降低了硬件的成本。
The utility model belongs to the technical field of nuclear magnetic resonance groundwater detection, in particular to a current acquisition device of a nuclear magnetic resonance water detector, comprising: a current detection module, which is used for detection of alternating current signals, and converts large current signals into small current signals; a filter circuit; module, to smooth the waveform of the detected current, attenuate or suppress interference components; A/D conversion module, convert the collected analog current signal into digital current signal; the central processing unit module, as a signal acquisition and processing module, will The current signal is transmitted to the PC; the minimum system control module, including the clock circuit and the reset circuit, mainly controls the single-chip microcomputer to maintain the normal and stable operation of the single-chip microcomputer. The current acquisition device is small in size, light in weight, and more importantly, has low power consumption and reliable data acquisition results, which is conducive to long-term work in the field and greatly reduces the cost of hardware.
Description
Technical Field
The utility model belongs to the technical field of nuclear magnetic resonance groundwater is surveyed, especially, relate to a nuclear magnetic resonance water finder current acquisition device.
Background
Water resources are one of the most important natural resources on which human beings live, and the nuclear magnetic resonance technology for detecting underground water is the only new method for directly detecting underground water at present. The basic principle is that the underground water detection is realized by detecting nuclear magnetic resonance signals generated by hydrogen proton resonance transition in the underground water. At present, nuclear magnetic resonance underground water detection technology has been applied to multiple fields and aspects related to geophysics. In the nuclear magnetic resonance underground water detection technology, an excitation magnetic field needs to be transmitted to the underground through a transmitting antenna to excite the underground water to generate the nuclear magnetic resonance phenomenon. In a transmitting system of the nuclear magnetic resonance water detector, the current of a transmitting coil needs to be collected and then transmitted to a PC (personal computer) for monitoring the working condition of the transmitting system. Therefore, current collection system is an important link in nuclear magnetic resonance water exploration appearance, the utility model discloses just, design the device of preparation acquisition current signal to this link to make the main circuit keep apart with measuring circuit, can convert heavy current signal to the undercurrent signal, be suitable for long-term measurement, utilize the singlechip to come the collection processing unit as current signal, its response characteristic and precision are all relatively good, and the testing result is reliable, and easy operation satisfies open-air operational environment's requirement.
Disclosure of Invention
In order to improve nuclear magnetic resonance groundwater detection device's detection precision and practicality, the utility model provides a nuclear magnetic resonance water exploration appearance current collection system.
The purpose of the utility model is realized through the following technical scheme:
a nuclear magnetic resonance water detector current acquisition device, the device includes:
the current detection module is used for detecting an alternating current signal of a transmitting coil of the nuclear magnetic resonance water detector and converting a large current signal into a small current signal;
the filter circuit module is used for flattening the waveform of the detected current and attenuating or inhibiting interference components;
the A/D conversion module is used for converting the analog current signal output by the filter circuit module into a digital current signal;
the central processing unit module is used as a signal acquisition processing module and transmits the acquired and processed current signals to the PC;
and the minimum system control module comprises a clock circuit and a reset circuit which are connected with the central processing unit module and used for carrying out clock and reset control on the central processing unit module.
Further, the central processing unit adopts an STM32F103 singlechip.
Furthermore, the current detection module adopts a current transformer formed by winding a manganese core magnetic ring and a coil as a current signal detection circuit.
Further, the A/D conversion module adopts an ADC0809 chip.
Further, the clock circuit adopts a parallel structure of a capacitor C8 and a capacitor C9; the reset circuit is switched on and off by opening or closing the switch S1, when the switch S1 is closed, current passes through the resistor R6 connected with the switch S1 in series, and when the switch S1 is opened, current passes through the capacitor C4 connected with the switch S1 in parallel.
Further, the signal collected by the current transformer is amplified by an amplifier and then output through a resistor R3.
Further, the current transformer is an electromagnetic current transformer.
Compared with the prior art, the utility model, beneficial effect lies in: the utility model discloses an electromagnetic type current transformer can detect and exchange heavy current, realizes electrical isolation through electromagnetic induction moreover, is suitable for long-time measurement. Utilize STM32F103 singlechip as the central processing unit that current acquisition handled for signal acquisition's precision is higher, and response characteristic is better, owing to utilize the singlechip to carry out real-time tracking collection as central processing unit, also makes this current collection device can carry out real-time tracking collection to transmitting coil's electric current, guarantees transmitting device's operating stability. In general, the current acquisition device has small volume, light weight, more importantly, low power consumption and reliable data acquisition result, is beneficial to long-time work in the field, and greatly reduces the cost of hardware.
Drawings
Fig. 1 is a block diagram of a system module of a current collecting device of a nuclear magnetic resonance water detector provided in an embodiment of the present invention.
Fig. 2 is a schematic diagram of a current detection circuit based on a current transformer according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a filter circuit according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of an ADC0809 circuit provided by an embodiment of the present invention.
Fig. 5 is a schematic diagram of a reset circuit in the central processing unit STM32F103 single chip microcomputer provided by the embodiment of the present invention.
Fig. 6 is a schematic diagram of a clock circuit in the central processing unit STM32F103 single chip microcomputer provided by the embodiment of the present invention.
Fig. 7 is a schematic circuit diagram of a central processing unit STM32F103 single chip according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, a structural block diagram of a current collecting device of a nuclear magnetic resonance water detector mainly includes: the current detection device mainly comprises a current transformer, a filter circuit, an A/D conversion circuit and a central processing unit mainly comprising a singlechip. The current detection module is used for detecting an alternating current signal of a transmitting coil of the nuclear magnetic resonance water detector and converting a large current signal into a small current signal; the filter circuit module is used for flattening the waveform of the detected current and attenuating or inhibiting interference components; the A/D conversion module is used for converting the analog current signal output by the filter circuit module into a digital current signal; the central processing unit module is used as a signal acquisition processing module and transmits the acquired and processed current signals to the PC; and the minimum system control module comprises a clock circuit and a reset circuit which are connected with the central processing unit module and used for carrying out clock and reset control on the central processing unit module.
As shown in fig. 2, the current detection device mainly including a current transformer is used for detecting the current of the transmitting coil of the nuclear magnetic resonance water detector, the current detection module adopts a current transformer formed by winding a manganese core magnetic ring and a coil as a current signal detection circuit, the signal collected by the current transformer is amplified by an amplifier and then output through a resistor R3, and the current transformer is an electromagnetic current transformer.
As shown in fig. 3, the filter circuit smoothes the waveform of the detected current, and attenuates or suppresses the disturbance component. After filtering by a resistor and capacitor combination, the output is amplified by an amplifier.
The utility model discloses an AD conversion module adopts ADC0809 chip, as shown in FIG. 4, it is an 8 AD converter, the low power dissipation, and the requirement of practicality can be satisfied to the low price.
The utility model discloses a central processing unit is STM32F103 singlechip, and this chip has advantages such as low power dissipation, high performance and low price, can satisfy open-air long-time data acquisition's requirement. Referring to fig. 5-7, the circuit schematic diagram of the minimum system of the single chip microcomputer STM32F103 comprises a clock circuit and a reset circuit, wherein the clock circuit adopts a capacitor C8 and a capacitor C9 which are connected in parallel; when the switch S1 is closed, the reset circuit is turned on or off by opening or closing the switch S1, and when the switch S1 is opened, the current flows through the resistor R6 and the capacitor C4.
The utility model relates to a nuclear magnetic resonance water detector's current acquisition device's working process:
when the nuclear magnetic resonance water detector works, a high-power transmitting system of the nuclear magnetic resonance water detector can transmit an excitation magnetic field to the underground, and meanwhile, a current detection circuit mainly comprising a current transformer needs to acquire the current of a transmitting coil.
The detected current of the transmitting coil passes through a filter circuit, the waveform of the current signal is flattened, and interference components are attenuated or suppressed, so that the subsequent current signal processing is facilitated and the accuracy is improved.
The filtered current is transmitted to an AD data conversion module, namely ADC0809, through a data line, and D/A conversion of data is carried out.
The converted data are transmitted to the central processing unit for data processing, acquisition and storage, and then are uploaded to the PC, so that real-time tracking acquisition and real-time monitoring can be performed, and the stable operation of the system is guaranteed.
The above description is only for the specific embodiments of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (7)
1. The utility model provides a nuclear magnetic resonance water finder current collection system which characterized in that, the device includes:
the current detection module is used for detecting an alternating current signal of a transmitting coil of the nuclear magnetic resonance water detector and converting a large current signal into a small current signal;
the filter circuit module is used for flattening the waveform of the detected current and attenuating or inhibiting interference components;
the A/D conversion module is used for converting the analog current signal output by the filter circuit module into a digital current signal;
the central processing unit module is used as a signal acquisition processing module and transmits the acquired and processed current signals to the PC;
and the minimum system control module comprises a clock circuit and a reset circuit which are connected with the central processing unit module and used for carrying out clock and reset control on the central processing unit module.
2. The current collecting device of the nuclear magnetic resonance water detector according to claim 1, wherein the central processing unit adopts an STM32F103 single chip microcomputer.
3. The current collecting device of the nuclear magnetic resonance water finder as claimed in claim 1, wherein the current detecting module uses a current transformer formed by winding a manganese core magnetic ring and a coil as a current signal detecting circuit.
4. The nuclear magnetic resonance water finder current collecting device of claim 1, wherein the a/D conversion module employs an ADC0809 chip.
5. The current collecting device of the nuclear magnetic resonance water detector according to claim 1, wherein the clock circuit adopts a parallel structure of a capacitor C8 and a capacitor C9; the reset circuit is switched on and off by opening or closing the switch S1, when the switch S1 is closed, current passes through the resistor R6 connected with the switch S1 in series, and when the switch S1 is opened, current passes through the capacitor C4 connected with the switch S1 in parallel.
6. The NMR water finder current collection device of claim 3, wherein the signal collected by the current transformer is amplified by an amplifier and then output through a resistor R3.
7. The NMR water finder current collection device of claim 6, wherein the current transformer is an electromagnetic current transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021612008.0U CN213023323U (en) | 2020-08-06 | 2020-08-06 | A nuclear magnetic resonance water detector current acquisition device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021612008.0U CN213023323U (en) | 2020-08-06 | 2020-08-06 | A nuclear magnetic resonance water detector current acquisition device |
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| Publication Number | Publication Date |
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| CN213023323U true CN213023323U (en) | 2021-04-20 |
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| CN202021612008.0U Expired - Fee Related CN213023323U (en) | 2020-08-06 | 2020-08-06 | A nuclear magnetic resonance water detector current acquisition device |
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2020
- 2020-08-06 CN CN202021612008.0U patent/CN213023323U/en not_active Expired - Fee Related
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Granted publication date: 20210420 |