CN100561223C - A kind of measuring equipment of synchronous real-time measurement soil three parameters - Google Patents
A kind of measuring equipment of synchronous real-time measurement soil three parameters Download PDFInfo
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- CN100561223C CN100561223C CNB2005100631495A CN200510063149A CN100561223C CN 100561223 C CN100561223 C CN 100561223C CN B2005100631495 A CNB2005100631495 A CN B2005100631495A CN 200510063149 A CN200510063149 A CN 200510063149A CN 100561223 C CN100561223 C CN 100561223C
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Abstract
The present invention relates to the compound sensor and the measuring equipment thereof of synchronous real-time measurement soil three parameters.Sensor comprises: the nose cone of measured soil cone index is compounded in soil moisture content and soil conductivity sensor on the nose cone.Measuring equipment comprises: head tree, be used to support the base of head tree, and be arranged on the guide rail on the head tree, the sensor erecting bed of advancing up and down along guide rail; Be fixed in controller and accumulator box on the head tree, controller has signal input interface and signal output interface, the stepper motor that the driving sensor erecting bed is advanced along guide rail, the position transducer of survey sensor travel depth, and the hollow round bar and the pressure transducer that are used to support sensor; The accumulator of the energy being provided for sensor and stepper motor is installed on the road wheel of head tree side lower part, is installed on the data acquisition applicator platform at head tree top.Equipment of the present invention is by the stressed index of high-frequency resistance, high-frequency loss and circular cone of synchronous real-time measurement circular cone, and then determine soil moisture content, soil conductivity and compactness according to relevant multivariable model, realize the synchronous real-time measurement of soil three parameters.
Description
Technical field
The present invention relates to a kind of sensor and support equipment thereof of measured soil parameter, relate in particular to the compound sensor and the measuring equipment thereof of a kind of synchronous real-time measurement soil profile water percentage, conductivity and compactness.
Background technology
In agricultural production process, soil not only provides physical support to the growth of plant, also is the nutrition library of plant growth.The experimental results shows that soil moisture content and compactness are two most important physical parameters that influence crop growth.Water is the lifeblood that guarantees crop growth, the series reaction that is taken place in the soil, and energy is all relevant with moisture with mass exchange, and its direct relation crop yield and quality.Soil compaction is not only closely related with the break ground root system development situation of rate and plant of the germination of seed, also directly affects the migration process of soil moisture simultaneously.Soil cone index is defined as circular cone and gos deep into the long-pending suffered resistance (N/cm of unit circle poppet surface in the soil course
2), be the measurement parameter of present widely used in the world evaluation soil compaction.
Since (1980) applied statistics experimental techniques such as TOPP have disclosed quantitative relationship between soil moisture content and the soil dielectric property, soil science worker's extensive concern and attention have been caused based on the basic research of soil dielectric property.On the other hand, although soil compaction can be portrayed by measuring cone index, coupled problem makes this measurement means still be subjected to significant limitation so far in practical application between multivariate.In influencing soil moisture and compactness measuring accuracy all multifactor, people recognize that gradually the intercoupling relation between soil dielectric and the mechanical characteristic has become the main error component of determining measuring accuracy.In recent years Busscher etc. (1997, Soil ﹠amp; Tillage Research, 43:205-217), once attempted using the measurement that cone index is proofreaied and correct soil moisture content, conversely Newman and Hummel (1999, Presentation for 1999ASAE/CSAE-SCGR Annual International Meeting, Toronto, Ontario, Canada, 6,18-21) inquired into the possibility that improves the soil compaction measuring accuracy by soil moisture content.In addition, the famous TDR soil water measuring instrument Micromodultechnik of manufacturer (Available at:www.mesasystemsco.com/pdf_files/TRIME_Theory.pdf, verified2001March 27) of Germany also to the TRIME series of products of its production provided one based on the soil weight at 1.4Mg m
-3Updating formula.
Though it has been recognized that the importance and the correlativity thereof of soil compaction and soil moisture content, be independently to carry out all the time to the measurement in these two physics, make measuring process loaded down with trivial details, waste time and energy.Especially because two parameter measurements must be finished respectively, the disturbance that previous physical quantity produces soil badly influences the accuracy of a back physical quantity.
Soil conductivity is another important soil physics parameter, and it is a soil salt, moisture, and the content of organic matter, the concentrated expression of soil texture structure etc., for farmland operation, research such as environmental pollution and application have considerable effect.The method that the measurement of soil conductivity is adopted at present mainly is the method for dielectric loss, belongs to method for electromagnetically measuring with the dielectric measuring method of measured soil water percentage.As noted earlier, soil conductivity is the combined reaction of multiple soil function, so it and other parameter I of measured soil such as moisture) etc. close contact arranged.So, obtain soil conductivity information synchronously in real time correction more accurately will be provided for the measurement of other parameter of soil.
What be also pointed out that especially is, present measured soil water percentage TDR method (Time Domain Reflectometry technology commonly used, Time DomainReflectrometry) required Measuring Time is longer, need a time interval of tens of seconds between per twice measurement, can not accomplish real measuring in real time continuously, and transfer wire length had certain requirement, also there are many problems when merging with pressure transducer.
Summary of the invention
The objective of the invention is to overcome existing soil parameters sensor to the soil parameters separating and measuring, ignore correlativity and interactional defective between each parameter; Thereby a kind of stressed index of high-frequency resistance, high-frequency loss and circular cone by the synchronous real-time measurement circular cone is provided, and then determines the compound sensor and the measuring equipment thereof of soil moisture content, soil conductivity and soil compaction according to relevant multivariable model.
Soil three parameter compound sensors provided by the invention, appearance structure comprises as shown in Figure 1: nose cone 8, soil moisture content sensor 2, hollow round bar 3 reaches by the signal conductor 10 in the hollow round bar 3; It is characterized in that: also comprise soil conductivity sensor 5, pressure transducer 4 is isolated the insulator 9 of each sensor; Wherein nose cone 8 is arranged on a port of hollow round bar 3, insulator 9, soil moisture content sensor 2, insulator 9, soil conductivity sensor 5, insulator 9, soil conductivity sensor 5, insulator 9, soil conductivity sensor 5, insulator 9, soil conductivity sensor 5 and insulator 9 orders are trapped among outside the hollow round bar 3, and pressure transducer 4 is installed in the another port of hollow round bar 3; Signal conductor 10 is that solderless links with the becket employing, and signal conductor 10 is electrically connected with pressure transducer 4 and passes hollow round bar 3.
Described soil moisture sensor 2 is formed by nose cone 8 and near nose cone 8 nearest beckets, and nose cone 8 promptly can be measured cone index when inserting soil, and the while is also as an ingredient of moisture transducer.
Described insulator 9 is selected from the PVC insulating material.
The measuring equipment of synchronous real-time measurement soil three parameter sensors provided by the invention, contour structures comprises as shown in Figure 2: a head tree 15 is arranged on the base 20, and a depth transducer 12 is installed in head tree 15 1 sides; It is characterized in that, also comprise a main erecting bed 13, head tree 15 tops are fixed as an integral body by main erecting bed 13 is installed with sensor erecting bed 6; These main erecting bed 13 1 sides are installed a stepper motor 11, one side of described head tree 15 is provided with a gear-like guide rail 16 from top to bottom, at least 8 pulleys 14 are installed on the sensor erecting bed 6, embrace head tree 15 from four direction, and sensor erecting bed 6 is moved up and down along head tree 15; Main erecting bed 13 is connected with head tree 15 by pulley 14, and pulley 14 is electrically connected with stepper motor 5, and is advanced up and down along the gear-like guide rail 16 of head tree 15 by stepper motor 11 drive pulley 14; One up stroke controll block 17 is positioned at the head tree left surface, and once Stroke Control piece 18 is positioned at the bottom; Soil three parameter sensors and depth transducer 12 are installed on this sensor erecting bed 6; The hollow round bar 3 of soil three parameter sensors is installed in below the sensor erecting bed 6 by sphere link key 7; An accumulator box 25 and controller 26 are fixed in main erecting bed 13 tops, and accumulator is stepper motor 11, controller 26, depth transducer 12 and the power supply of soil three parameter sensors; Soil three parameter sensors are electrically connected with controller 26 by signal wire 10, and measuring-signal outputs to controller 26 by the signal wire 10 of hollow round bar 3 inside; Thereby the operation of main erecting bed 6 is controlled in the running of described controller 26 control step motors 11, and three control knobs are arranged on the main panel of controller 26, is respectively applied for the main erecting bed 13 of control upwards, downward or stop motion.
In technique scheme, also be included in one pair of pedal 21 is installed on the base 20, in order to overcome the bounce-back that the soil reacting force produces in the measuring process.
In technique scheme, also comprise a road wheel 22, this road wheel 22 is installed in a side of base 20.
In technique scheme, described controller 26 comprises: signal conditioning unit, A/D converter, CPU element, data-carrier store and data communication interface; After wherein CPU element is received the control signal of button on the controller panel, begin to send the operation of control signal drive motor, and the signal that according to circumstances begins pick-up transducers is imported, and do the rectifying and wave-filtering corresponding signal by signal conditioning unit and handle, with after the A/D converter conversion process, again data storage in storer; When resistance during greater than 500N, CPU also can send control signal to motor, the drive motor revolution.
Also comprise a PC, this PC is electrically connected with CPU element, and CPU element then can be passed to PC to data simultaneously; Data acquisition is electrically connected with multiple sensor with storer, gathers the multiple sensor signal and is transferred to PC by communication interface 24.
Described up stroke controll block or down stroke controll block are a derby.
Described signal conditioning unit is common current rectifying and wave filtering circuit.
The length of described hollow round bar is selected according to surveying the soil profile degree of depth.
The process of utilizing equipment of the present invention to measure is as follows:
At first press on the controller panel to knob down, the CPU of controller sends control signal to stepper motor after receiving signal, motor is advanced downwards when driving the step; When measuring beginning, soil three parameter sensors move downwards with sensor erecting bed 6 and main erecting bed 13, controller begins sensor-lodging simultaneously, and process, store, if being connected to the communication of PC and PC and controller simultaneously is UNICOM, then controller transmits measurement data to PC simultaneously.When the sensor erecting bed is run into the down stroke piece, CPU can receive a down stroke block signal, receive behind this signal and just send the upwards control signal of operation to stepper motor, drive stepping motor is upwards advanced, and finishes the collection of sensor signal simultaneously and stops to transmit data to PC.When sensor is upwards advanced when running into the up stroke piece, CPU can receive a up stroke block signal and send the control signal that stops to stepper motor, stops the stepper motor operation, and a measurement procedure finishes.The user can be according to the requirement adjustment of the actual measurement degree of depth position of stroke piece 17,18 up and down, thereby changes the moving range of soil three parameter sensors.The length of described guide rail is fixed, and scope that the Stroke Control piece is controlled is the length that is less than or equal to guide rail.
Advantage of the present invention:
Synchronous real-time measurement soil three parameter sensors provided by the invention and support equipment thereof have: (1) merges the measurement of three kinds of different physical quantities in a sensor, and by the mathematical modeling of these three related physical quantities being improved simultaneously three's measuring accuracy; Can be in the depth range of 0-50cm the real-time measured soil cone index of continuous synchronization and water percentage, three important soil physics parameters of conductivity, draw vertical profile of soil cone index and water percentage, conductivity; Realized the synchronous real-time measurement of soil cone index and water percentage, conductivity.
(2) measured soil cone index and water percentage, conductivity are the section containing parameter, and depth profiled can realize by the hollow round bar of selecting different length.
(3) speed of sensor insertion soil is constant, thereby has guaranteed the consistance to the soil cone index decipher.
The pedal that can allow the operator stand when (4) providing operation has effectively overcome the bounce-back that the soil reacting force produces in the measuring process.
(5) road wheel is installed on the head tree bottom side, does not promptly influence measurement, is convenient to the field again and moves.
(6) design by mechanically, for example the connecting portion of sensor and column is the flexible connection adopted, and sensor inserts in the soil with constant speed like this, and assurance is to the consistance of soil cone index explanation; In addition, when sensor inserts in the soil course, run into foreign matter and dodge ability; Can prevent that perhaps the soil compression that occurs is excessive in measuring process, and cause the pressure transducer overload.
(7) also have two kinds of self-protection functions among the present invention: at first, when from the resistance of soil when excessive, resistance is greater than 500N (500 newton) time, and controller will be advanced no longer downwards, but returns, and burns to prevent motor overload; Its two, the connecting portion of sensor and equipment is movable, and sensor is inserted the foreign matter of being run in the soil course, can hide the foreign matter in the soil automatically, for example stone.
(8) equipment also is provided with data acquisition and memory portion, and can connect with PC.
Description of drawings
Fig. 1 soil three parameter sensors synoptic diagram of the present invention
The measuring equipment three-dimensional structure diagram of Fig. 2 synchronous real-time measurement soil three parameters of the present invention
Main erecting bed and head tree joint portion sectional view in Fig. 3 equipment of the present invention
The composition frame chart of Fig. 4 controller of the present invention
Drawing is described as follows:
Cone-1; Soil moisture content sensor-2; Hollow round bar-3;
Pressure transducer-4; Soil conductivity sensor-5; Erecting bed-6;
Spherical link key-7; Cone-8; Insulator-9;
Signal wire-10; Stepper motor-11; Depth transducer-12;
Main erecting bed-13; Pulley-14; Head tree-15;
Gear-like guide rail-16; Up stroke controll block-17; Down stroke controll block-18;
Screw-19; Base-20; Pedal-21;
Road wheel-22; Handle-23; Communication interface-24;
Battery case-25; Controller-26;
Embodiment
With reference to figure 1, soil three parameter sensors of making a present embodiment comprise: one is used to support the hollow round bar 3 of each sensor, its end has a cone 8, this cone is the metal circular cone of American Society of Agricultural Engineers specified standard size, the circular insulator 9 of embedding PVC material successively in hollow round bar 3, soil moisture content sensor 2, PVC annulus insulator 9, soil conductivity sensor 5, PVC annulus insulator 9, soil conductivity sensor 5, PVC annulus insulator 9, soil conductivity sensor 5, PVC annulus insulator 9, soil conductivity sensor 5 and PVC annulus insulator 9 orders are trapped among outside the hollow round bar 3, and pressure transducer 4 is installed in the another port of hollow round bar 3; Signal conductor 10 is that solderless links with the becket employing, and signal conductor 10 is electrically connected with pressure transducer 4 and passes hollow round bar 3, and measuring-signal outputs to device controller 26 by signal wire 10.
The soil moisture content sensor 2 of present embodiment is made up of cone 8 and close cone 8 nearest nickel-chrome beckets, and as long as the size of ring is round hollow round bar 3.Cone promptly can be measured cone index when inserting soil, simultaneously also as an ingredient of moisture transducer.From the circuit angle, be exactly one section electric capacity (for moisture transducer) or lead (for conductivity sensor).
The soil conductivity sensor 5 of present embodiment is made up of 4 nickel-chrome metal rings.
The pressure transducer 4 of present embodiment is that the pressure transducer of buying on the market is that Germany produces the C9B foil gauge of (HDM company).
The cone index measuring principle is, under the driving of stepper motor 5, cone 1 inserts soil, and soil resistance passes to pressure transducer 4 by hollow round bar 3, and converts voltage output to by it.Soil moisture content sensor 2 is embedded on the cone 1, and the mechanism of action is the edge effect of electromagnetic field.According to the Maxwell formula, the edge effect of conducting ring electromagnetic field is relevant with the specific inductive capacity of its surrounding medium, and further the relation of soil dielectric constant of pointing out according to the Topp formula again and soil moisture content can draw the initial value of tested soil moisture content.Soil moisture content sensor 2 is separated by PVC insulator 9 and conehead 8 and soil conductivity sensor 5, and measuring-signal outputs to device controller 26 by the signal wire 10 of hollow round bar 3 inside.Soil conductivity sensor 5 is embedded on the cone 1, and the mechanism of action is the high-frequency dielectric loss of electromagnetic field, according to the size of loss angle, can draw the conductivity of measured soil.Soil conductivity sensor 6 is separated by PVC insulator 9 and soil moisture content sensor 2 and hollow round bar 3, and measuring-signal outputs to device controller 26 by the signal wire 10 of hollow round bar 3 inside.The pressure transducer of buying on one market 4 is installed on soil three parameter sensors tops, and its signal outputs to device controller 26 by signal wire 10.
With reference to figure 2, make the synchronous real-time measurement soil three parameter sensors measuring equipments of a present embodiment, the hollow round bar 3 of soil three parameter sensors is connected with sensor erecting bed 6 by spherical link key 7.Because the chain of spherical link key is connected to certain spatial degrees of freedom, guaranteed that in sensor erecting bed 6 downward traveling process when cone 1 was run into foreign matter (as stone etc.), hollow round bar 3 had certain excursion capability, thereby avoid foreign matter, avoid the damage of foreign matter sensor.
One base 20 is provided with a head tree 15 on this base 20, the front of head tree 15 is provided with a gear-like guide rail 16 from top to bottom; The end face of head tree 15 links to each other with sensor erecting bed 6 by nut by main erecting bed 13, becomes as a whole.A power pack 25 and controller 26 are fixed in main erecting bed 13 tops, and power pack 25 can be an external power supply, also can be accumulator boxes, and accumulator is stepper motor 11, controller 26, depth transducer 12 and the power supply of soil three parameter sensors; One depth transducer 12 and stepper motor 11 all are fixed on the main erecting bed 13, main erecting bed 13 is connected with head tree 15 by 12 pulleys 14,12 pulleys 14 are installed in respectively on the sensor erecting bed 6, the position of installing is the position of the medial surface and the head tree inclusion of sensor erecting bed, see Fig. 3 for details, embrace head tree 15 from four direction, and sensor erecting bed 6 is moved up and down along head tree 15 directions; Pulley 14 electrically connects with stepper motor 11, and is advanced up and down along the gear-like guide rail 16 in head tree 15 fronts by stepper motor 11 drivings.Depth transducer 12 adopts the potentiometer principle, causes the change of potentiometer resistance value when main erecting bed 13 moves up and down, thereby changes sensor output voltage.The controller 26 of one band communication interface 24 is electrically connected with stepper motor 11, and stepper motor 11 drives main erecting bed 13 constant-speed operations under the control of controller 26, thereby has guaranteed the consistance to the soil cone index measurement.The top of head tree 15 left surfaces is equipped with up stroke controll block 17, the bottom is equipped with down stroke controll block 18, up stroke controll block 17 is a derby with down stroke controll block 18, for example: copper billet, when meeting this stroke piece, will advance in the other direction or stop main erecting bed.Complete measuring process is as follows: when measuring beginning, compound sensor moves downwards with sensor erecting bed 6 and main erecting bed 13, when running into down stroke controll block 18, changes upwards operation of traffic direction, stops up to running into 17 operations of up stroke controll block.The user can be according to the requirement adjustment of the actual measurement degree of depth position of stroke piece 17,18 up and down, thereby changes the moving range of soil three parameter sensors.
Also comprise by screw 19 head tree 15 is anchored on the base 20, one pair of pedal 21 is set on base 20, when measuring, stand for the user, thus the rebound phenomena that produces owing to resistance is excessive when preventing to measure.
Also one pair of road wheel 22 can be installed on the base rear portion, during equipment work, road wheel 22 is unsettled; When mobile, make road wheel 22 walking that lands, be convenient to move by handle 23 head tree 15 that recedes.
With reference to figure 4, the controller 26 of present embodiment is installed on head tree 15 tops.There are three control knobs to be respectively applied for the main erecting bed of control upwards on its main panel, downward and stop motion.The function of controller 25 has two aspects: thus the operation of main erecting bed is controlled in the running of control step motor 11, and gather the multiple sensor signal and be transferred to PC by communication interface 24.Controller 26 comprises:
One by common current rectifying and wave filtering circuit as signal conditioning unit, this signal conditioning unit will be done the rectifying and wave-filtering corresponding signal and handle;
One A/D converter is TSC7106; It becomes digital signal and after the A/D converter conversion process with the analog signal conversion of input, again data storage in storer;
One CPU element is MSP430; After wherein CPU element is received the control signal of button on the controller panel, begin to send the operation of control signal drive motor, and according to circumstances begin the signal input of pick-up transducers, be input to signal conditioning unit;
One data-carrier store is FLASH628, is used for the data of the sensor that storage of collected arrives;
One data communication interface is MAX232; After wherein CPU receives the control signal of button on the panel, begin to send control signal drive motor operation, and according to circumstances begin the signal input of pick-up transducers and do corresponding signal and handle, then data storage in storer; When resistance during greater than 500N, CPU also can send control signal to motor, the drive motor revolution.
Also comprise a PC, this PC is electrically connected with CPU element, and CPU element then can be passed to PC to data simultaneously; Data acquisition is electrically connected with multiple sensor with storer, gathers the multiple sensor signal and is transferred to PC by communication interface 24.
It is stepper motor 11, device controller 26, depth transducer and the power supply of soil three parameter sensors that this equipment adopts accumulator, and accumulator is positioned over the accumulator box 25 at controller 26 back sides during work.
Though in conjunction with the accompanying drawings the present invention has been carried out sufficient description, it is noted that for the person of ordinary skill of the art various changes and modification all are possible.Therefore, except this change and modification deviate from the category of the present invention, they all should be included among the present invention.
Claims (9)
1. the measuring equipment of synchronous real-time measurement soil three parameters, comprising: a head tree (15) is arranged on the base (20), and a depth transducer (12) is installed in head tree (15) one sides; It is characterized in that, comprise that also one is fixed on the main erecting bed (13) on head tree (15) top, these main erecting bed (13) one sides are installed a stepper motor (11), and head tree (15) top is connected as a whole by main erecting bed (13) with sensor erecting bed (6); One gear-like guide rail (16) is set from top to bottom in a side of head tree (15), at least 8 pulleys (14) are installed on the sensor erecting bed (6), embrace head tree (15) from four direction, and sensor erecting bed (6) is moved up and down along the head tree direction; Main erecting bed (13) is connected with head tree (15) by pulley (14), and pulley 14 is electrically connected with stepper motor (11), and is advanced up and down along the gear-like guide rail (16) of head tree (15) by stepper motor (11) drive pulley (14); One up stroke controll block (17) is positioned at head tree (15) one sides, and once Stroke Control piece (18) is positioned at head tree (15) bottom; This sensor erecting bed (6) is gone up a pressure transducer (4) and depth transducer (12) is installed; A hollow round bar (3) of soil three parameter sensors is installed in below the sensor erecting bed (6) by spherical link key (7); Main erecting bed (13) top fixed power source box (25) and controller (26), described power pack (25) is external power supply or accumulator box, in the described accumulator box accumulator is arranged, described accumulator is stepper motor (11), controller (26), depth transducer (12) and the power supply of soil three parameter sensors; Soil three parameter sensors are electrically connected with controller (26) by signal wire (10), and measuring-signal outputs to controller (26) by the inner signal wire (10) of hollow round bar (3); Described controller (26) thus the operation of main erecting bed is controlled in the running of control step motor, have three to be respectively applied for the main erecting bed of control (13) upwards on the main panel of controller (26), or the control knob of stop motion downwards;
Described soil three parameter sensors are arranged on a port of hollow round bar (3) by a nose cone (8), insulator (9), soil moisture content sensor (2), insulator (9), soil conductivity sensor (5), insulator (9), soil conductivity sensor (5), insulator (9), soil conductivity sensor (5), insulator (9), soil conductivity sensor (5) and insulator (9) order are trapped among outside the hollow round bar (3), pressure transducer (4) is installed in the another port of hollow round bar (3), signal conductor (10) is that solderless links with soil moisture content sensor (2) and soil conductivity sensor (5) employing, and signal conductor (10) is electrically connected with pressure transducer (4) and passes hollow round bar (3) composition.
2. by the measuring equipment of described synchronous real-time measurement soil three parameters of claim 1, it is characterized in that described controller comprises: signal conditioning unit, A/D converter, CPU element, data-carrier store and data communication interface; After wherein CPU element is received the control signal of button on the controller panel, begin to send the operation of control signal drive motor, and the signal that according to circumstances begins pick-up transducers is imported, and do the rectifying and wave-filtering corresponding signal by signal conditioning unit and handle, with after the A/D converter conversion process, again data storage in storer; When resistance during greater than 500N, CPU also can send control signal to motor, the drive motor revolution.
3. by the measuring equipment of described synchronous real-time measurement soil three parameters of claim 2, it is characterized in that described signal conditioning unit is common current rectifying and wave filtering circuit.
4. press the measuring equipment of described synchronous real-time measurement soil three parameters of claim 2, it is characterized in that, also comprise a PC, this PC and data communication interface (24) electrically connect, data-carrier store is electrically connected with multiple sensor, gathers the multiple sensor signal and is transferred to PC by data communication interface (24).
5. by the measuring equipment of described synchronous real-time measurement soil three parameters of claim 1, it is characterized in that, also comprise one pair of pedal (21), be installed on base (20) front.
6. by the measuring equipment of described synchronous real-time measurement soil three parameters of claim 1, it is characterized in that also comprise a road wheel (22), this road wheel (22) is installed in the back side of base (20).
7. by the measuring equipment of described synchronous real-time measurement soil three parameters of claim 1, it is characterized in that the length of described hollow round bar is selected according to surveying the soil profile degree of depth.
8. by the measuring equipment of described synchronous real-time measurement soil three parameters of claim 1, it is characterized in that described power pack is an accumulator box or external electric supply socket.
9. by the measuring equipment of described synchronous real-time measurement soil three parameters of claim 1, it is characterized in that: described soil moisture content sensor (2) is formed by nose cone (8) and near a nearest becket of nose cone (8);
Described soil conductivity sensor (5) is made up of 4 nickel-chrome metal rings.
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| CN1815228A (en) | 2006-08-09 |
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