CN203519049U

CN203519049U - Device for detecting soil compactness and humidity

Info

Publication number: CN203519049U
Application number: CN201320590528.XU
Authority: CN
Inventors: 杨晓京; 杨小江
Original assignee: Kunming University of Science and Technology
Current assignee: Kunming University of Science and Technology
Priority date: 2013-09-24
Filing date: 2013-09-24
Publication date: 2014-04-02
Anticipated expiration: 2023-09-24

Abstract

The utility model discloses a device for detecting soil compactness and humidity. The device comprises a humidity sensor, a support frame, a pressure sensor, an electric push rod, an encoder, a single-chip microcomputer, a liquid crystal display screen, a detection box and a test rod. The pressure sensor and the humidity sensor serve as detecting elements, and the electric push rod serves as an executive element. The penetration depth of a cone on the front end of the test rod into the soil is detected through the encoder arranged on the electric push rod, and the soil compactness and humidity at the corresponding depth are detected by the pressure sensor and the humidity sensor and are displayed on the liquid crystal display screen.

Description

The pick-up unit of a kind of soil compaction and humidity

Technical field

The utility model relates to the pick-up unit of a kind of soil compaction and humidity, and this device is applicable to the outdoor Site Detection to soil compaction and humidity, belongs to soil function detection field.

Background technology

Due to the operation of walking in field of the farm implements of tractor and traction thereof, tire rolls effect to soil, cause topsoil to be depressed heavy, the degree of packing increases, especially in recent years, extensive along with various agricultural equipments, frequent use, this compaction also increases thereupon, well beyond the natural restoring force to soil compression, soil compression phenomenon is on the rise, and owing to using a large amount of chemical industry fertilizer to cause the degree of packing that hardens of soil to increase, soil compression is lost the aperture between soil particle, cause that air and water can not free flows, and then affect development condition and the crop yield of root system of plant, cause crop failure, therefore, learn that soil packing degree seems particularly important.

Conventionally adopt in the world cone index CI (Cone Index) to characterize soil cultivation layer depth and tillage resistance, concentrated expression soil by machines physical property, mostly adopt sand replacement method both at home and abroad, tradition core cutter method, the indirect methods such as drop hammer type measuring method, measure soil packing degree, it is low that these methods are not only measured efficiency, and accuracy of measurement is not high, domestic original adoption is from spot sampling, then in the indoor method of testing, these methods adopt manual method by circular cone injection soil mostly, the record of data adopts range estimation reading more, only single for compactness in test process, do not consider the humidity of soil.

Summary of the invention

The purpose of this utility model is to provide the pick-up unit of a kind of soil compaction and humidity, comprise humidity sensor 1, bracing frame 2, pressure transducer 3, electric pushrod 4, scrambler 5, single-chip microcomputer 6, LCDs 7, detect box 8 and reference test bar 9, electric pushrod 4 is arranged on bracing frame 2, scrambler 5 and reference test bar 9 are arranged on electric pushrod 4, humidity sensor 1 and pressure transducer 3 are arranged on reference test bar 9, single-chip microcomputer 6 and LCDs 7 are integrated into and detect in box 8, and are connected with scrambler 5, humidity sensor 1 and pressure transducer 3 by circuit.

Humidity sensor 1 described in the utility model is HIH3605/3610 type humidity sensor;

Pressure transducer 3 described in the utility model is resistance-strain chip pressure transducer;

Single-chip microcomputer 6 described in the utility model is STC89C52 model single-chip microcomputer.

The utility model in use, this device is placed on to soil surface to be tested, utilize bracing frame 2 that equipment is fixed, by single-chip microcomputer 6 human-computer interaction interfaces, set the degree of depth and the length of reference test bar 9 retention time in soil of wanting testing soil, start this device, utilize single-chip microcomputer 6 to control electric pushrod 4 push to test bars 9, vertical is pressed in soil to be measured, in this process, by the electronic scrambler 5 pushing away on 4, record the number of turns of motor rotation, obtain the displacement of electric pushrod 4, determine the degree of depth of reference test bar 9 injection soil, by P1.4 mouth, data are sent to single-chip microcomputer 6, with default value contrast, when the degree of depth of injection reaches after preset value, monolithic 6 is controlled electric pushrod 4, electric pushrod 4 is no longer moved downward and keep 1 ~ 3min, by pressure sensing 3, measure this deep soil force value, by P1.0 oral instructions in single-chip microcomputer 6, through single-chip microcomputer 6, process and obtain soil packing degree value, the humidity value of measuring this deep soil by humidity sensor 1, by P1.3 oral instructions, in single-chip microcomputer 6, then single-chip microcomputer 6 is presented in LCDs by P0 port and by these data, and test finishes.

The beneficial effects of the utility model are: equipment is simple and practical, are convenient to realize robotization and control, and test data is convenient to watch and is read, and is convenient to test soil packing degree and the humidity of different depth.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

Fig. 2 is schematic flow sheet of the present utility model;

Fig. 3 is the utility model circuit diagram;

In figure: 1-humidity sensor, 2-bracing frame, 3-pressure transducer, 4-electric pushrod, 5-scrambler, 6-single-chip microcomputer, 7-LCDs, 8-testing cassete, 9-reference test bar.

Embodiment

Below in conjunction with drawings and Examples, the utility model is described in further detail, but content of the present utility model is not limited to described scope.

The pick-up unit of soil compaction and humidity described in the present embodiment, comprise humidity sensor, bracing frame 2, pressure transducer 3, electric pushrod 4, scrambler 5, single-chip microcomputer 6, LCDs 7, detect box 8 and reference test bar 9, electric pushrod 4 is arranged on bracing frame 2, scrambler 5 and reference test bar 9 are arranged on electric pushrod 4, humidity sensor 1 and pressure transducer 3 are arranged on reference test bar 9, single-chip microcomputer 6 and LCDs 7 are integrated into and detect in box 8, and be connected with scrambler 5, humidity sensor 1 and pressure transducer 3 by circuit, as shown in Figure 1.

Humidity sensor described in the present embodiment 1 is HIH3605/3610 type humidity sensor, and pressure transducer 3 is resistance-strain chip pressure transducer, and single-chip microcomputer 6 is STC89C52 model single-chip microcomputer.

Described in the present embodiment, the pick-up unit of soil compaction and humidity in use, this device is placed on to soil surface to be tested, utilize bracing frame 2 that equipment is fixed, by single-chip microcomputer 6 human-computer interaction interfaces, set the degree of depth and the length of reference test bar 9 retention time in soil of wanting testing soil, start this device, utilize single-chip microcomputer 6 to control electric pushrod 4 push to test bars 9, vertical is pressed in soil to be measured, in this process, by the electronic scrambler 5 pushing away on 4, record the number of turns of motor rotation, obtain the displacement of electric pushrod 4, determine the degree of depth of reference test bar 9 injection soil, by P1.4 mouth, data are sent to single-chip microcomputer 6, with default value contrast, when the degree of depth of injection reaches after preset value, monolithic 6 is controlled electric pushrod 4, electric pushrod 4 is no longer moved downward and keep 2min, by pressure sensing 3, measure this deep soil force value, pressure transducer is connected by the SDA mouth of amplifying circuit and the P1.0 mouth of single-chip microcomputer, force value is transferred in sheet machine 6, through single-chip microcomputer 6, process and obtain soil packing degree value, by humidity sensor 1, measure the humidity value of this deep soil, by P1.3 oral instructions in single-chip microcomputer 6, then single-chip microcomputer 6 is presented in LCDs by P0 port and by these data, test finishes, as shown in Fig. 2 ~ 3.

Claims

1. the pick-up unit of a soil compaction and humidity, it is characterized in that: comprise humidity sensor (1), bracing frame (2), pressure transducer (3), electric pushrod (4), scrambler (5), single-chip microcomputer (6), LCDs (7), detect box (8) and reference test bar (9), electric pushrod (4) is arranged on bracing frame (2), scrambler (5) and reference test bar (9) are arranged on electric pushrod (4), humidity sensor (1) and pressure transducer (3) are arranged on reference test bar (9), single-chip microcomputer (6) and LCDs (7) are integrated into and detect in box (8), and by circuit and scrambler (5), humidity sensor (1) is connected with pressure transducer (3).

2. the pick-up unit of soil compaction according to claim 1 and humidity, is characterized in that: described humidity sensor (1) is HIH3605/3610 Linear voltage output mode Integrated Humidity Sensor.

3. the pick-up unit of soil compaction according to claim 1 and humidity, is characterized in that: described pressure transducer (3) is resistance-strain chip pressure transducer.

4. the pick-up unit of soil compaction according to claim 1 and humidity, is characterized in that: described single-chip microcomputer (6) is the STC89C52 model single-chip microcomputer of STC Corporation.