CN209764775U - Measuring device for soil conductivity - Google Patents

Abstract

The utility model belongs to the technical field of soil detects, especially, be a measuring device of soil conductivity, including power module, power module's output electricity is connected at the input of singlechip, power module's output electricity is connected at the input of signal generation circuit, the output electricity of signal generation circuit is connected at the input of graphite electrode, the output electricity of graphite electrode is connected at the output of signal processing circuit; through setting up graphite electrode, graphite electrode has characteristics such as stable performance, sensitivity is high, measuring range is wide, and effectual improvement measurement of efficiency reduces measuring time, through setting up temperature measurement circuit and signal processing circuit, the temperature compensation unit in the accessible signal processing circuit collects the real-time temperature of soil to all convert into the conductivity value of this solution when 25 ℃ with measuring soil solution conductivity, improved measuring precision.

Description

Measuring device for soil conductivity

Technical Field

The utility model belongs to the technical field of soil detects, concretely relates to measuring device of soil conductivity.

Background

Soil conductivity reflects rich information on soil quality and physical properties. For example: the salinity, moisture, temperature, organic matter content and texture structure in the soil all affect the conductivity of the soil to varying degrees. The conductivity value of the soil is effectively obtained, and the method has great significance for determining the difference of space-time distribution of various field parameters.

Currently, the measurement of soil conductivity is mostly laboratory measurement, and is performed by a corresponding instrument. Laboratory measurement of soil conductivity has higher precision, but the measurement process is tedious, takes long time, and is with high costs, real-time poor.

SUMMERY OF THE UTILITY MODEL

To solve the problems set forth in the background art described above. The utility model provides a measuring device of soil conductivity has simple structure, and low cost's characteristics have shortened measuring time, have improved measurement of efficiency.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a measuring device of soil conductivity, includes power module, power module's output electricity is connected at the input of singlechip, power module's output electricity is connected at signal generation circuit's input, signal generation circuit's output electricity is connected at the input of graphite electrode, the output electricity of graphite electrode is connected at signal processing circuit's output.

Preferably, the output end of the signal processing circuit is electrically connected to the input end of the single chip microcomputer.

Preferably, the single chip microcomputer is electrically connected with the RS485 communication circuit in a bidirectional mode.

Preferably, the input end of the signal processing circuit is electrically connected with a temperature measuring circuit.

Preferably, the signal processing circuit has a temperature compensation unit.

Compared with the prior art, the beneficial effects of the utility model are that:

The utility model discloses, through setting up graphite electrode, graphite electrode has stable performance, sensitivity is high, characteristics such as measuring range is wide, effectual improvement measurement of efficiency, reduce measuring time, through setting up temperature measurement circuit and signal processing circuit, the temperature compensation unit in the accessible signal processing circuit collects the real-time temperature of soil to the conductivity value that will record soil solution conductivity and all convert this solution when 25 ℃, improved measuring precision.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

Fig. 1 is a schematic structural view of the present invention;

In the figure: 1. a power supply module; 2. a signal generating circuit; 3. a single chip microcomputer; 4. a signal processing circuit; 5. a graphite electrode; 6. an RS485 communication circuit; 7. a temperature measurement circuit.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

examples

Referring to fig. 1, the present invention provides the following technical solutions: a soil conductivity measuring device comprises a power module 1, wherein direct current provided from the outside can be subjected to voltage conversion by arranging the power module 1, the circuit is converted and then supplies power to a single chip microcomputer 3, a signal generating circuit 4, a signal processing circuit 4 and an RS485 communication circuit 6, the output end of the power module 1 is electrically connected with the input end of the single chip microcomputer 3, analog quantity output by the signal processing circuit 4 can be converted into digital signals after the analog-to-digital conversion in the single chip microcomputer 3 is carried out, the data are stored and transmitted, the output end of the power module 1 is electrically connected with the input end of a signal generating circuit 2, an alternating square wave excitation signal generated by the signal generating circuit 2 can be sent to a graphite electrode 5 by arranging the signal generating circuit 2, the output end of the signal generating circuit 2 is electrically connected with the input end of the graphite electrode 5, through setting up graphite electrode 5, can convert the conductivity of soil into the signal of telecommunication proportional to it, graphite electrode 5 has stable performance, characteristics that sensitivity is high, and measuring range is wide, is suitable for the survey of soil conductivity, and sensitivity is high, and is with low costs, graphite electrode 5's output end electricity is connected in signal processing circuit 4's output, through setting up signal processing circuit 4, can amplify, rectify, filter graphite electrode 5's signal, generates stable direct current voltage signal.

Specifically, the output end of the signal processing circuit 4 is electrically connected to the input end of the single chip microcomputer 3.

Specifically, the single chip microcomputer 3 is connected with the RS485 communication circuit 6 in a bidirectional electric mode, and the collected numerical value of the conductivity can be transmitted through the RS485 communication circuit 6 by arranging the RS485 communication circuit 6.

Specifically, the input end of the signal processing circuit 4 is electrically connected with a temperature measuring circuit 7, and the temperature of soil can be measured by arranging the temperature measuring circuit 7, so that the measurement precision of the device is improved.

Specifically, the signal processing circuit 4 is provided with a temperature compensation unit, and the temperature compensation unit can convert the measured soil conductivity into a soil conductivity value at 25 ℃ by setting the temperature compensation unit of the signal processing circuit 4, so that the measurement precision of the device is improved, and a user can compare data conveniently.

the utility model discloses a theory of operation and use flow: when the utility model is used, the graphite electrode 5 of the device is buried in the soil, the power module 1 carries out voltage conversion on direct current provided from the outside, the circuit is converted and then supplies power to the singlechip 3, the signal generating circuit 2, the signal processing circuit 4 and the 485 communication circuit, the frequency 1KHz alternating-current square wave excitation signal generated by the signal generating circuit 2 is sent to one end of the graphite electrode 5, an alternating electric field is generated in electrolyte solution, the weak alternating-current signals generated at two ends of the electrode in the alternating electric field of the electrolyte solution are detected through the other end of the electrode, stable direct-current voltage is obtained through the signal processing circuits 4 such as amplification, shaping and filtering, and finally the stable direct-current voltage is converted into corresponding conductivity, the graphite electrode 5 sends the detected information to the signal processing circuit 4, the temperature measuring circuit 7 transmits the detected temperature to the signal processing circuit 4, the signal and temperature information of the probe of the graphite electrode 5 are transmitted by the signal processing circuit 4, amplifying, rectifying and filtering to generate a stable direct current voltage signal, sending the stable direct current voltage signal to the single chip microcomputer 3, converting the stable direct current voltage signal into a digital signal after analog-to-digital conversion in the single chip microcomputer 3, sending the digital signal to the RS485 communication circuit 6, and transmitting and displaying the digital signal through the RS485 communication circuit 6.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (5)

1. A measuring device of soil conductivity, including power module (1), characterized by: the output end of power module (1) is electrically connected at the input of singlechip (3), the output end of power module (1) is electrically connected at the input of signal generation circuit (2), the output end of signal generation circuit (2) is electrically connected at the input of graphite electrode (5), the output end of graphite electrode (5) is electrically connected at the output of signal processing circuit (4).

2. A soil conductivity measuring device according to claim 1, wherein: the output end of the signal processing circuit (4) is electrically connected with the input end of the singlechip (3).

3. A soil conductivity measuring device according to claim 1, wherein: and the singlechip (3) is electrically connected with the RS485 communication circuit (6) in a bidirectional way.

4. A soil conductivity measuring device according to claim 1, wherein: the input end of the signal processing circuit (4) is electrically connected with a temperature measuring circuit (7).

5. A soil conductivity measuring device according to claim 1, wherein: the signal processing circuit (4) has a temperature compensation unit.