CN111650648A - Winter bamboo shoot resistivity rapid detection imaging system and method - Google Patents
Winter bamboo shoot resistivity rapid detection imaging system and method Download PDFInfo
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Abstract
The invention relates to a system and a method for rapidly detecting and imaging resistivity of winter bamboo shoots. The first connecting rod and the second connecting rod of the detection main rod are telescopic rods; the bottom end of the second connecting rod is in spherical meshed connection with the support, so that special requirements of inclined plane detection under complex terrain conditions such as mountainous regions, gullies and the like can be met; the micro electrodes are arranged in the scanning antenna according to a certain arrangement mode, and the number and the arrangement spacing of the micro electrodes can be adjusted according to the actual detection requirement; the resistivity parallel measurement host wirelessly transmits the acquired electric signals to a personal digital terminal to finish the interpretation of apparent resistivity data and generate inversion resistivity cloud charts at different depths, so that the winter bamboo shoot burying information is obtained. The invention solves the problem of bamboo forest ecological damage caused by depending on experience in the traditional picking method through a physical method technology, and can effectively improve the picking efficiency of the winter bamboo shoots.
Description
Technical Field
The invention relates to the technical field of resistivity detection in a physical detection method, in particular to a winter bamboo shoot rapid detection imaging system and method.
Technical Field
Winter bamboo shoots are known as "rare vegetables" since ancient times, generally grow in 20-50 cm underground, are different in depth, strong in adaptability and extremely wide in distribution, grow into bamboo once the earth surface is exposed, lose edible and medical values, and therefore timely and accurate discovery and harvesting are of great importance in winter bamboo shoot cultivation. The traditional picking method mostly adopts an excavation method, an earth drilling method, a soil profile method and the like, and the methods are time-consuming and labor-consuming, have low efficiency and are easy to cause huge damage to the ecology of the bamboo forest. According to the growth characteristics of the winter bamboo shoots, the distribution of the winter bamboo shoots is wide, so that the actual growth and distribution states of the exploration objects are random, the scale is relatively small, and the exploration objects are not easy to perceive on the ground. At present, researchers at home and abroad carry out related research work on detection of winter bamboo shoots, and try to adopt modes such as ultrasonic waves, infrared rays and the like, but the methods also have the following defects: (1) ultrasonic detection utilizes the time difference that reflected signals are transmitted to a probe when waves meet different interfaces when the waves propagate in a medium, a target body with a complex shape is not easy to probe, the surface of the target body is required to be smooth, and a coupling agent is required to fill a gap between the target body and the probe, so that sufficient acoustic coupling is ensured. For detection targets buried underground and with rough surfaces, such as winter bamboo shoots, application is difficult to achieve due to the fact that disordered reflected waves are easy to generate. (2) The infrared detection is to utilize the irregular movement of molecules and atoms of an object in a conventional environment and radiate thermal infrared energy outwards, and to judge the temperature distribution condition of the surface of the object by receiving the infrared radiation emitted by the object. The method has poor penetration capability, is easy to be shielded and is easy to be interfered by various heat sources, light sources and the like, and when the ambient temperature is close to the temperature of a target body, the detection sensitivity is obviously reduced.
The method is based on the conductivity difference between the winter bamboo shoots and the surrounding soil medium, and adopts a resistivity method to carry out the rapid detection imaging of the winter bamboo shoots. According to the method, the current and potential distribution condition in a detection medium can be rapidly obtained through a specific observation system, the resistivity distribution characteristics of the medium in a detection area can be visually reflected through three-dimensional resistivity inversion, and whether the winter bamboo shoots exist in the detection area or not and the parameters such as the size, the specific position and the like of the winter bamboo shoots are accurately judged. Compared with the traditional winter bamboo shoot exploration method, the method has the advantages of no damage, high data acquisition speed, wide information quantity, high-precision real-time imaging and the like, greatly reduces the labor intensity, improves the working efficiency, and has better market application prospect.
Disclosure of Invention
In order to better meet the market demand and solve the problems existing in the traditional technology, the invention provides a system and a method for rapidly detecting and imaging the resistivity of winter bamboo shoots. The system has reasonable structural design, quick and portable operation, higher detection precision, real-time imaging analysis and capability of adapting to different detection site requirements.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a system and a method for rapidly detecting and imaging resistivity of winter bamboo shoots comprise a detection main rod, a support, a scanning antenna, a micro electrode, a resistivity parallel measurement host and a personal digital terminal. The main rod is divided into a first connecting rod and a second connecting rod; the lower part of the first connecting rod is provided with a fastening bolt; communication connecting wires are arranged in the first connecting rod and the second connecting rod, the upper port of each communication wire is connected with the input end of the resistivity parallel measurement host, and the lower port of each communication wire is connected with the scanning antenna; the bracket is a foldable telescopic triangular bracket, and the top end of the bracket is connected with a second connecting rod; the scanning antenna is of a circular structure with a certain thickness; the micro electrodes are arranged in the scanning antenna, and are connected and communicated with each other through a multi-core waterproof armored cable; the resistivity parallel measurement host is a customized instrument, an integrated controller, a power supply and other core modules are arranged in the instrument, and a switch, an operation key, an aviation plug, an indicator light, a charging port and other auxiliary modules are arranged outside the instrument; the personal digital terminal machine is a portable tablet personal computer, the personal digital terminal machine can be arranged on the detection main rod and can also be a handheld type, and the personal digital terminal machine is in wireless communication with the host machine.
Preferably, a nested structure is formed between the first connecting rod and the second connecting rod of the detection main rod, and the detection main rod has scalability, wherein the first connecting rod is a base rod, and the second connecting rod is a movable rod;
preferably, the first connecting rod is provided with a length adjusting hole and a fastening bolt, the second connecting rod is provided with a plurality of length adjusting holes, and the fastening bolt can be adjusted according to the terrain of the actual working site to enable the first connecting rod and the second connecting rod to reach proper heights; typically, the total length of the boom is between 0.9 and 1.2 m.
Preferably, the upper end of the first connecting rod of the detection main rod is a hand holding area, the holding area is of spiral grains, and the surface material has the functions of skid resistance, wear resistance and the like, so that the instrument can be held and pressed down forcibly.
Preferably, survey mobile jib second connecting rod bottom with the support is spherical interlock connection, can satisfy special demands such as carrying out inclined plane under the complicated topography conditions such as mountain region and survey.
Preferably, the tail end of the detection main rod is provided with a laser corrector device for accurately correcting the detection range of the scanning antenna.
Preferably, the support is a foldable telescopic support, is convenient to assemble, disassemble and carry, and consists of four parts, wherein 3 outer supports form an included angle of 120 degrees, 1 inner support is perpendicular to the scanning antenna, and the lower end of the support is fixedly connected with the scanning antenna.
Preferably, the scanning antenna is in a ring shape with a certain thickness, the plurality of micro electrodes are arranged inside the scanning antenna in a certain arrangement mode and are connected and communicated through a multi-core waterproof armored cable, so that the scanning antenna is convenient to install and replace; the number and the arrangement distance of the micro electrodes can be adjusted.
Preferably, the main detection rod, the support and the scanning antenna shell are all made of high-strength light alloy or engineering plastic.
Preferably, the resistivity parallel measurement host is internally provided with a data acquisition system and a power supply, and the core module of the data acquisition system mainly comprises: the device comprises a command setting module, a command indicating module, a data transmission module and a data interpretation and processing module, wherein the power supply is a rechargeable lithium battery.
Preferably, the personal digital terminal has on-site data processing and real-time imaging functions.
A method for rapidly detecting resistivity of winter bamboo shoots comprises two parts of field detection, data processing and real-time imaging, and comprises the following operation steps:
(1) in-situ testing, wherein two conditions of no winter bamboo shoot burying and winter bamboo shoot burying are respectively defined in a detection area in advance;
(2) calibrating parameters, and testing the resistivity parameters under the two conditions;
(3) setting parameters, and determining parameters such as current, voltage, measurement time and power supply period adopted by a system;
(4) in the field detection, a system micro electrode is inserted into soil of a detection area through manual impact, and field current and potential data acquisition is sequentially carried out;
(5) data inversion, namely synchronously transmitting the data to a personal digital terminal when the acquisition of the resistivity parallel measurement host is finished, and finishing apparent resistivity data calculation and resistivity inversion processing;
(6) and (3) imaging analysis, wherein an operator sets the number of imaging resistivity sections on a personal digital terminal, and quickly generates inversion resistivity cloud charts at different depths and the like.
Preferably, the field data acquisition mode is that the power supply of the opposite point power supply is adopted, and the rest electrodes are used as measuring electrodes to synchronously acquire the potential difference between the measuring electrodes and the reference electrode in parallel. By adopting the power supply measuring mode of the system, a large amount of current and potential data can be obtained in a short time, meanwhile, the error problem caused by different measuring time is reduced, and the reliability of the data is ensured.
The invention has the following beneficial effects:
(1) the rapid detection imaging system and method for the resistivity of the winter bamboo shoots can better solve the blind picking and mis-picking phenomena caused by only relying on experience in the traditional winter bamboo shoot picking method, provide a physical method technology, can intuitively and accurately analyze the size, the growth direction, the burial depth and other characteristics of the winter bamboo shoots, and have the advantages of no damage, high data acquisition speed, wide information quantity, high-precision real-time imaging and the like compared with the traditional method, and are beneficial to reducing the labor intensity and improving the working efficiency;
(2) the rapid detection imaging system and method for the resistivity of the winter bamboo shoots are flexible in field detection method, reasonable in device structure, rapid and light in construction, strong in field applicability, stable and reliable in data transmission, complete in data processing program and imaging software function, and have market popularization and application values;
(3) according to the system and the method for rapidly detecting and imaging the resistivity of the winter bamboo shoots, the parallel resistivity measuring method is high in testing efficiency and precision and reliable in data result, the functions of rapidly detecting and imaging the winter bamboo shoots in real time can be achieved, the distribution condition of the winter bamboo shoots below a scanning antenna can be accurately judged according to the resistivity cloud picture, and therefore the picking efficiency of the winter bamboo shoots is improved.
Drawings
FIG. 1 is a perspective view of a field structure of a winter bamboo shoot resistivity rapid detection imaging system according to an embodiment of the invention;
FIG. 2 is a cloud diagram of resistivity of four sections detected by winter bamboo shoots in situ according to an embodiment of the invention.
Description of the labeling: the system comprises a detection main rod 1, a support 2, a scanning antenna 3, a resistivity parallel measurement host computer 4, a personal digital terminal 5, a first connecting rod 101, a second connecting rod 102, a regulating hole 103, a fastening bolt 104, a clamper 105, an anti-slip sleeve 106, a communication connecting wire 107, a laser corrector 201, a miniature electrode 301, an armored cable 302, a reference electrode N303, an integrated controller 401, a power supply module 402, an instrument switch 403, an operation key 404, a navigation plug 405, a shoulder strap buckle 406 and a charging port 407.
Detailed Description
The principles and features of the present invention and the technical effects achieved thereby are explained in detail below with reference to the accompanying drawings:
as shown in fig. 1, a perspective view of a field structure of the rapid detection imaging system for resistivity of winter bamboo shoot in this embodiment is shown, and the rapid detection imaging system for resistivity of winter bamboo shoot in this embodiment is characterized in that: the device comprises a detection main rod 1, a support 2, a scanning antenna 3, a micro electrode 301, a resistivity parallel measurement host 4 and a personal digital terminal 5. The detection main rod 1 is divided into a first connecting rod 101 and a second connecting rod 102 which are telescopic rods, wherein the first connecting rod 101 is provided with a length adjusting hole 103 and a fastening bolt 104, the second connecting rod 102 is provided with a plurality of length adjusting holes 103, and the fastening bolt 104 can be adjusted according to the terrain and the terrain of an actual working site to enable the detection main rod 1 to reach a proper height; a communication connecting line 107 is arranged in the first connecting rod 101 and the second connecting rod 102, the upper port of the communication connecting line 107 is connected with the input end of the resistivity parallel measurement host 4, and the lower port of the communication connecting line 107 is connected with the scanning antenna 3; the bracket 2 is a foldable telescopic triangular bracket, the top end of the bracket is connected with a second connecting rod 102, 3 outer brackets form an included angle of 120 degrees, and the direction of 1 inner bracket is vertical to the scanning antenna; the scanning antenna 3 is a circular structure with a certain thickness; the miniature electrodes 301 are arranged in the scanning antenna 3, the reference electrode N303 is arranged at the bottom end of the inner support, and all the miniature electrodes 301 and the reference electrode 303 are connected and communicated through a multi-core waterproof armored cable 302; an integrated controller 401 and a power module 402 are arranged inside the resistivity parallel measurement host 4, and a switch 403, an operation key 404, an air plug 405, a shoulder strap buckle 406, a charging port 407 and the like are arranged outside the instrument; the personal digital terminal 5 is a portable tablet computer, the personal digital terminal 5 can be arranged on the detection main rod clamp holder 105 or can be held by hands, the personal digital terminal 5 and the resistivity parallel measurement main machine 4 adopt wireless communication, and the power source 402 is electrically connected with the integrated controller module 401, the scanning antenna 3 and the micro electrode 31.
Meanwhile, the working principle of the resistivity parallel measurement host 4 is as follows: when the 1# and 2# electrodes are used as power supply electrodes, the rest electrodes (3#, 4#, 5# … …) are used as measuring electrodes to synchronously acquire the potential difference delta U between the reference electrode N and the reference electrode in parallel1 m(ii) a Then 1# and 3# electrodes are used as power supply electrodes, and the rest electrodes (2#, 4#, 5# … …) are used as measuring electrodes to synchronously acquire the potential difference delta U between the reference electrode N and the electrodes in parallel2 mAnd repeating the steps until all the electrode combinations are powered. The resistivity parallel measurement host 4 and the personal digital terminal 5 realize real-time wireless communication of data by adopting a wireless local area network or a Bluetooth mode and the like; the personal digital terminal machine 5 is a mini-pen with Windows operating platformThe operator can carry out human-computer interaction operation without being bound by a communication cable within a certain range by using electronic equipment such as a notebook computer, a mobile phone or a tablet.
A method for rapidly detecting and imaging resistivity of winter bamboo shoots comprises field detection, data processing and real-time imaging and specifically comprises the following steps: (1) the method comprises the steps of in-situ testing, (2) parameter calibration, (3) parameter setting, (4) field detection, (5) data inversion and (6) imaging analysis.
Before the detection is started, two conditions of no bamboo shoot burying and bamboo shoot burying are defined in a detection area in advance, resistivity parameters under the two conditions are tested and calibrated respectively, and sampling parameters (grounding detection, current, voltage, measurement time, power supply period and the like) of the measurement host 4 are set. During detection, an operator holds the detection main rod 1 according to a designed route, inserts the detection main rod into soil of a detection area through manual impact, enables the micro electrodes 301 in the measurement host machine 4 to be fully coupled with the soil of the detection area, issues a data acquisition instruction through the measurement host machine 4, sequentially supplies power to the scanning antenna 3 to carry out field data acquisition, transmits synchronous data to the personal digital terminal 5 after the data acquisition is finished, firstly ensures the reliability of signals through analyzing acquired current and voltage signals, ensures the transmission and receiving of the signals of each micro electrode 301, ensures that a detection system does not have an electric leakage phenomenon, further completes apparent resistivity data calculation and inversion processing, sets the number of imaging resistivity sections, and finally quickly generates inversion resistivity cloud pictures and the like at different depths, and analyzes and obtains winter bamboo shoot buried information.
The related data are consulted to show that the resistivity of the winter bamboo shoots and the surrounding soil is as follows:
as can be seen from the table above, the resistivity of the winter bamboo shoots is obviously different from that of the surrounding medium, and a physical basis is provided for the application of the system and the method to winter bamboo shoot detection.
In data processing and real-time imaging inversion, a detection area is subjected to three-dimensional gridding, the resistivity in each grid is calculated, the resistivity distribution conditions at different depths are obtained by adopting a smooth constrained least square inversion algorithm, and finally, the winter bamboo shoot burial information is obtained through analysis.
The expression for the resistivity inversion is:
(GTG+λCTC)Δm＝GTΔd
in the formula, Δ d is observed data d and forward theoretical calculation value d0The residual vector between; g is a coefficient matrix; Δ m is a modified vector of the initial model m, and C is a model smooth matrix; λ is the damping factor.
Case (2):
the method is characterized in that a winter bamboo shoot planting area in a certain mountain area is detected, the winter bamboo shoot resistivity rapid detection imaging system and the method are adopted on site for detection, in the detection, the radius of a scanning antenna is set to be 25cm, one micro electrode is arranged at every 10 degrees, and 36 micro electrodes are arranged in the scanning antenna. And (3) performing resistivity inversion on the actually measured current and potential data to obtain a resistivity cloud chart of the medium in a range of 40cm below the scanning antenna (see figure 2). Through comparison and analysis of resistivity cloud pictures at different depths, two low-resistivity regions below the antenna are judged to be caused by the winter bamboo shoots, the burying depth is basically within 40cm below the ground, and the judged winter bamboo shoots 1 have larger diameters than the winter bamboo shoots 2. And then, the field excavation verification shows that the actual growth condition of the underground winter bamboo shoots is consistent with the resistivity detection result, which shows that the rapid detection imaging system for the resistivity of the winter bamboo shoots, provided by the invention, has excellent performance, the method is reliable and the effect is good.
The above description is provided for the purpose of further details of the technical solutions provided in the preferred embodiments of the present invention, and it should not be understood that the embodiments of the present invention are limited to the above description, and it should be understood that, for those skilled in the art to which the present invention pertains that various changes and modifications can be made without departing from the spirit and scope of the present invention.
Claims (8)
1. A winter bamboo shoot resistivity rapid detection imaging system is characterized by comprising: the system comprises a detection main rod, a bracket, a scanning antenna, a micro electrode, a resistivity parallel measurement host and a personal digital terminal; the detection main rod is divided into a first connecting rod and a second connecting rod; the bottom end of the second connecting rod is in spherical occlusion connection with the bracket; the scanning antenna is internally formed by connecting a plurality of miniature electrodes, and a reference electrode (N) is arranged at the center of the scanning antenna; the resistivity parallel measurement host consists of core modules such as an integrated controller and a power supply; the detection main rod, the resistivity parallel measurement host and the scanning antenna are connected through a communication connecting line; the personal digital terminal is a portable intelligent device; the resistivity parallel measurement host and the personal digital terminal are in wireless communication.
2. The winter bamboo shoot resistivity rapid detection imaging system of claim 1, wherein: the first connecting rod and the second connecting rod are telescopic rods, the first connecting rod is a base rod, the second connecting rod is a movable rod, the first connecting rod and the second connecting rod are connected through fastening bolts, a plurality of length adjusting holes are distributed in the second connecting rod, and the fastening bolts can be adjusted according to the terrain of an actual working site to enable the system to reach a proper height; typically, the total length of the probe rod is between 0.9 and 1.2 m.
3. The winter bamboo shoot resistivity rapid detection imaging system of claim 2, wherein: the bottom end of the second connecting rod of the detection main rod is in spherical meshed connection with the support, so that the special requirements of inclined plane detection under complex terrain conditions such as mountainous regions, gullies and the like can be met; meanwhile, the foldable telescopic support is composed of four parts, 3 outer supports form an included angle of 120 degrees, and 1 inner support is perpendicular to the scanning antenna.
4. The winter bamboo shoot resistivity rapid detection imaging system of claim 1, wherein: the micro electrodes are arranged in the scanning antenna according to a certain arrangement mode and are connected and communicated through a multi-core waterproof armored cable, so that the scanning antenna is convenient to install and replace; the number and the arrangement distance of the micro electrodes can be adjusted.
5. The winter bamboo shoot resistivity rapid detection imaging system of claim 1, wherein: the resistivity parallel measurement host is internally provided with a data acquisition system and a power supply, and the core module of the data acquisition system mainly comprises: the device comprises a command setting module, a command indicating module, a data transmission module and a data interpretation and processing module, wherein the command setting module, the command indicating module, the data transmission module and the data interpretation and processing module are used for finishing field data acquisition work; the power supply is a rechargeable lithium battery.
6. The winter bamboo shoot resistivity rapid detection imaging system of claim 1, wherein: the personal digital terminal machine is a micro notebook computer, a mobile phone or a tablet and other electronic equipment based on a Windows operation platform, and has the functions of field data interpretation and real-time imaging.
7. The winter bamboo shoot resistivity rapid detection imaging system according to claims 5 and 6, characterized in that: the resistivity parallel measurement host and the personal digital terminal realize real-time wireless communication of data by adopting a wireless local area network or a Bluetooth mode and the like, and an operator can carry out man-machine interaction operation within a certain range without being limited by a communication cable.
8. A method for rapidly detecting the resistivity of winter bamboo shoots is characterized in that the system for rapidly detecting the resistivity of winter bamboo shoots is a specific observation system according to any one of claims 1 to 7, a field data acquisition mode is that a power supply at an opposite point is supplied, the other electrodes are used as measuring electrodes to synchronously and parallelly acquire potential difference between the measuring electrodes and a reference electrode N, and the number of imaging resistivity sections is set through calculation and inversion processing of apparent resistivity, so that inversion resistivity cloud maps at different depths are rapidly generated.
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