CN204832023U - Quick detection device of soil moisture based on near infrared spectroscopy - Google Patents

Abstract

The utility model discloses a quick detection device of soil moisture based on near infrared spectroscopy. The utility model discloses be provided with liquid crystal display, button in liquid crystal display's the below in the front of casing, the both sides of casing face respectively the symmetry be equipped with the transmission boss and receive the boss. The transmission boss is connected with launching fiber's one end, and launching fiber's the one end and the input of total mark ball are connected, and the output of total mark ball and the one end of receipt optic fibre are connected, and receive the other end of optic fibre and receive the boss and be connected, the total mark ball just treating the soil of detection. Light sources and reference light source be equipped with in the transmission boss, the receipt boss in photoelectric receiver is equipped with, this photoelectric receiver and circuit single -chip module signal connection. The utility model discloses a set up the light of two kinds of different wavelength of reference light source and light sources to set up closed boss and be convenient for launching fiber and received transmission light better in the casing, photoelectric receiver received the light that reflects better.

Description

A kind of soil moisture device for fast detecting based near infrared spectrum

Technical field

The utility model relates to a kind of soil moisture device for fast detecting based near infrared spectrum.

Background technology

At present, soil moisture detection technology is quite ripe abroad, and near-infrared spectrum technique is the one in multiple advanced technology, surveying moisture due near infrared is non-cpntact measurement, Non-Destructive Testing to measured object, and it has the on-line monitoring that detection time is short, harmless, sensitivity advantages of higher is widely used in soil moisture, therefore domestic independent research is a kind of based near infrared soil moisture device for fast detecting being necessary very.But domestic existing most of Portable soil moisture detector is not also in conjunction with the technology of near infrared spectrum, or combines this technology but be not mancarried device, thus cause soil moisture detection device sensitivity not, comparatively heavy.Propose a kind of soil moisture device for fast detecting based near infrared light whereby, wishing can the detection of convenient soil moisture by this device, for the design of soil moisture detection device from now on provides a kind of reference.

Summary of the invention

For the deficiency of background technology, the purpose of this utility model is to provide a kind of soil moisture device for fast detecting based near infrared spectrum.

The utility model comprises LCDs, button, photelectric receiver, reception boss, receives optical fiber, circuit one-chip computer module, housing, transmitting boss, reference light source, launching fiber, integrating sphere and detection light source.

The front of housing is provided with LCDs, button in the below of LCDs; In the two sides of housing, symmetry is equipped with transmitting boss and receives boss respectively, and wherein projection section is all positioned at housing.

Described transmitting boss is connected with one end of launching fiber, one end of launching fiber is connected with the input end of integrating sphere, the output terminal of integrating sphere is connected with the one end receiving optical fiber, and the other end receiving optical fiber is connected with reception boss, and described integrating sphere is just to soil to be detected.

At described transmitting boss built with detection light source and reference light source, it is controlled by the circuit one-chip computer module launched in boss; At described reception boss built with photelectric receiver, this photelectric receiver is connected with circuit one-chip computer module signal; Described LCDs and button are also connected with circuit one-chip computer module signal.

The utility model based near infrared luminous energy by the principle of the O-H key strong absorption in soil moisture, by arranging the light of reference light source and detection light source two kinds of different wave lengths, and in housing, arrange closed boss be convenient to launching fiber and receive utilizing emitted light better, photelectric receiver receives the light reflected better, utilizes fiber optic conduction technology to improve precision and the accuracy of measurement simultaneously.Because integrating sphere bottom surface is circular, so the soil water content in certain area can be measured, be not only spot measurement.

Accompanying drawing explanation

Fig. 1 is one-piece construction figure of the present utility model.

Fig. 2 is device case inside left structural drawing.

Fig. 3 is device case inner right side structural drawing.

In figure: 1: LCDs; 2: button; 3: photelectric receiver; 4: receive boss; 5: receive optical fiber; 6: circuit one-chip computer module; 7: housing; 8: launch boss; 9: reference light source; 10: wire; 11: launching fiber; 12: integrating sphere; 13: soil; 14: chamber; 15: detection light source.

Embodiment

As shown in Figure 1, Figure 2 and Figure 3, whole housing 7 is made up of plastic material, and its length, width and height are respectively 150mm, 100mm, 50mm.First drive reference light source 9 and detection light source 15 to work by circuit one-chip computer module 6, and control detection light source 15 and first emit beam, be transferred in integrating sphere 12 by the launching fiber 11 launching the upper outside company of boss 8, and then light arrives soil 13.Get back in integrating sphere 12 through diffuse reflection after light is absorbed a part by soil 13, reception boss 4 is entered again by receiving optical fiber 5) in, thus make photelectric receiver 3 fully receive the light reflected, after receiving light signal that detection light source 15 reflects, then control reference light source 9 by wire 10 and to emit beam the light signal making photelectric receiver receive reference light source 9 to reflect by said process.Two light signals, after circuit one-chip computer module 6 processes, understand parameter and the detected soil water content data such as magnitude of voltage that on LCDs 1 display light signal corresponding after calculating according to the model demarcated.

Because this measuring principle is based near infrared luminous energy by the O-H key strong absorption in the holard, thus wherein detection light source 15 send only can by the water strong absorption in soil, and reference light source 9 sends is only absorbed by the water in soil hardly.Here arranging reference light source 9 is also in order to avoid other factors (except water in soil) are on the impact of experimental result, thus improves measuring accuracy further.So detection light source 9 and reference light source 15 are except absorbing in soil moisture and having larger difference, other performances are all close.And photelectric receiver 3 can receive the wavelength that optical wavelength scope will comprise above-mentioned reference light source 9 and detection light source 15.

Specifically in use, one holds housing 7, arresting integrating sphere 12 on the other hand allows reception optical fiber 5 and launching fiber 11 naturally stretch, do not bend, then allow integrating sphere 12 facing to the testing soil 13 in chamber 14, the shift knob corresponding in 2 that pushes button starts to detect, and demonstrates soil 13 moisture by LCDs 1.

The above; it is only preferred embodiment of the present utility model; not the utility model is imposed any restrictions; every above embodiment is done according to the utility model technical spirit any simple modification, change and equivalent structure change, all still belong in the protection domain of technical solutions of the utility model.

Claims (2)

1. the soil moisture device for fast detecting based near infrared spectrum, comprise LCDs, button, photelectric receiver, reception boss, receive optical fiber, circuit one-chip computer module, housing, transmitting boss, reference light source, launching fiber, integrating sphere and detection light source, it is characterized in that:

The front of housing is provided with LCDs, button in the below of LCDs; In the two sides of housing, symmetry is equipped with transmitting boss and receives boss respectively, and wherein projection section is all positioned at housing;

Described transmitting boss is connected with one end of launching fiber, one end of launching fiber is connected with the input end of integrating sphere, the output terminal of integrating sphere is connected with the one end receiving optical fiber, and the other end receiving optical fiber is connected with reception boss, and described integrating sphere is just to soil to be detected;

At described transmitting boss built with detection light source and reference light source, it is controlled by the circuit one-chip computer module launched in boss; At described reception boss built with photelectric receiver, this photelectric receiver is connected with circuit one-chip computer module signal; Described LCDs and button are also connected with circuit one-chip computer module signal.

2. a kind of soil moisture device for fast detecting based near infrared spectrum according to claim 1, is characterized in that: described housing length, width and height are respectively 150mm, 100mm, 50mm.