CN204154635U - A kind of soil nutrient tacheometer based on LED light source - Google Patents
A kind of soil nutrient tacheometer based on LED light source Download PDFInfo
- Publication number
- CN204154635U CN204154635U CN201420505461.XU CN201420505461U CN204154635U CN 204154635 U CN204154635 U CN 204154635U CN 201420505461 U CN201420505461 U CN 201420505461U CN 204154635 U CN204154635 U CN 204154635U
- Authority
- CN
- China
- Prior art keywords
- led light
- light source
- photoelectric sensor
- output terminal
- photoelectric
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model relates to a kind of soil nutrient tacheometer based on LED light source, comprises light channel structure, photoelectric detective circuit and shell.Described light channel structure comprises circular cell, several LED light sources, several photoelectric sensors and several spike interference filters.Cuvette is provided with in described circular cell.The quantity of described LED light source, photoelectric sensor and spike interference filter is equal, and described LED light source and photoelectric sensor one_to_one corresponding are arranged on the periphery of circular cell.Described spike interference filter is between circular cell and photoelectric sensor.Described photoelectric detective circuit comprises signal conditioning circuit, pH electrode, A/D change-over circuit, microprocessor, liquid crystal display, keyswitch and power supply.The utility model has that test event is complete, measuring accuracy is high, test speed is fast, easy to operate, the feature such as be easy to carry.
Description
Technical field
The utility model relates to soil nutrients variability technical field, is specifically related to a kind of soil nutrient tacheometer based on LED light source.
Background technology
Soil nutrients variability is the basis of Formula fertilization by soil testing and the key link, and convenience and the accuracy of its test are that this technical service is in the precondition at agricultural production scene.For a long time, soil nutrients variability mainly relies on conventional method of analysis, Field sampling, lab analysis.There is many shortcomings in this method, as test duration length, complicated operation, not Portable belt, be difficult to fast-field evaluation, testing expense is high, is unfavorable for the popularization of Formula fertilization by soil testing at rural basic level.Therefore, development of small-scale, portable, test are fast, low cost, high-precision soil nutrient detecting instrument have great importance.
Utility model content
The purpose of this utility model is to provide a kind of soil nutrient tacheometer based on LED light source, and this soil nutrient tacheometer has that test event is complete, measuring accuracy is high, test speed is fast, easy to operate, the feature such as be easy to carry.
For achieving the above object, the utility model have employed following technical scheme:
Based on a soil nutrient tacheometer for LED light source, comprise light channel structure, photoelectric detective circuit and shell.
Further, described light channel structure comprises circular cell, several LED light sources, several photoelectric sensors and several spike interference filters.Cuvette is provided with in described circular cell.The quantity of described LED light source, photoelectric sensor and spike interference filter is equal, and described LED light source and photoelectric sensor one_to_one corresponding are arranged on the periphery of circular cell.Described spike interference filter is between circular cell and photoelectric sensor.
Further, described photoelectric detective circuit comprises signal conditioning circuit, pH electrode, A/D change-over circuit, microprocessor, liquid crystal display, keyswitch and power supply.Described signal conditioning circuit, its input end is connected with the output terminal of photoelectric sensor, pH electrode respectively, and its output terminal is connected with the input end of A/D change-over circuit.The described output terminal of A/D change-over circuit is connected with the input end of microprocessor.Power supply, powers for giving LED light source, photoelectric sensor, signal conditioning circuit, microprocessor, liquid crystal display, digital temperature sensor and keyswitch.5V, 3.3V electric power generating composition that described power supply is formed 12V power supply and 12V direct supply by 220V alternating current through transformer, rectifier, wave filter, voltage stabilizer conversion and changed through voltage stabilizer by 12V power supply.
Further, the quantity of described LED light source, photoelectric sensor, spike interference filter is 4.
Further, described photoelectric sensor is silicon photocell.
Further, the bandwidth of described spike interference filter is 10nm.
Further, described microprocessor is also connected with data-carrier store, print module and digital temperature sensor.Described microprocessor, its input end is connected with the output terminal of A/D change-over circuit, digital temperature sensor respectively; Its output terminal is connected with the input end of print module, liquid crystal display respectively; Its input/output terminal is connected alternately with data-carrier store, keyswitch respectively; Its power input is connected with the output terminal of power supply.Described A/D change-over circuit is integrated in microprocessor internal.Digital temperature sensor, for measures ambient temperature, and then compensates is on the impact of soil nutrient measurement data.
Principle of work of the present utility model is:
First, the light that LED light source sends, through the cuvette be fixed in cell, carries out filtration treatment by spike interference filter.Secondly, photoelectric sensor detects the light after spike interference filter process, and converts this light signal to electric signal and be sent to signal conditioning circuit.Again, after signal conditioning circuit processes the electric signal received, then convert thereof into digital signal through A/D change-over circuit and be sent to microprocessor processes.Finally, microprocessor calculates tested soil nutrient concentration according to Lambert-Beer's law, is shown by liquid crystal display.
Advantage of the present utility model:
(1) the utility model is by adopting several LED light sources, especially 4 LED light sources, and soil nutrients variability project can be made more complete.
(2) the utility model is by adopting spike interference filter, can improve soil nutrients variability precision.
(3) the utility model adopts high precision constant current chip drives LED light source, improves the stability of LED light source.
In sum, the utility model has that test event is complete, measuring accuracy is high, test speed is fast, easy to operate, the feature such as be easy to carry.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model;
Fig. 2 is the structural representation of the utility model light channel structure;
Fig. 3 is the circuit diagram that LED light source drives gating circuit;
Fig. 4 is the structural representation of the utility model housing.
Wherein:
1, circular cell, 2, LED light source, 3, photoelectric sensor, 4, spike interference filter, 5, shell, 6, pH electrode, 7, data-carrier store, 8, print module, 9, liquid crystal display, 10, signal conditioning circuit, 11, the microprocessor of integrated A/D change-over circuit, 12, power supply, 13, digital temperature sensor, 14, keyswitch, 15, exchange interface, 16, DC interface.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further:
A kind of soil nutrient tacheometer based on LED light source as Figure 1-Figure 4, comprises light channel structure, photoelectric detective circuit and shell 5.Described shell 5 is provided with and exchanges interface 15 and DC interface 16.
Further, as shown in figures 1 and 3, described light channel structure comprises circular cell 1, several LED light sources 2, several photoelectric sensors 3 and several spike interference filters 4.Cuvette is provided with in described circular cell 1.The quantity of described LED light source 2, photoelectric sensor 3 and spike interference filter 4 is equal, and described LED light source 2 and photoelectric sensor 3 one_to_one corresponding are arranged on the periphery of circular cell 1.Described spike interference filter 4 is between circular cell 1 and photoelectric sensor 3.Specifically, as shown in Figure 3, described LED light source adopts high precise current source MAX6126 to drive, and its gating adopts multi-channel analog gauge tap MAX4066.Multi-channel analog gauge tap is connected with microprocessor.Adopt MAX6126 driving LED light source, the stability of LED light source can be improved.
Further, the quantity of described LED light source 2, photoelectric sensor 3, spike interference filter 4 is 4.Adopt 4 LED light sources, the test event of soil nutrient can be expanded.
Further, described photoelectric sensor 3 is silicon photocell.Preferably, the model of described silicon photocell is 2DU6.
Further, the bandwidth of described spike interference filter 4 is 10nm.
Further, as shown in Figure 1, described photoelectric detective circuit comprises signal conditioning circuit 10, pH electrode 6, A/D change-over circuit, microprocessor 11, liquid crystal display 9, keyswitch 14 and power supply 12.Described signal conditioning circuit 10, its input end is connected with the output terminal of photoelectric sensor 3, pH electrode 6 respectively, and its output terminal is connected with the input end of A/D change-over circuit.The output terminal of described A/D change-over circuit is connected with the input end of microprocessor 11.Liquid crystal display 9 and keyswitch 14 are arranged on the surface of shell 5, and all the other structures are positioned at shell 5.Preferably, described pH electrode 6 is pH Glass Combination Electrode.The model of described microprocessor is MSP430F149.The model of described liquid crystal display is LCD1602, and liquid crystal display detects analysis result for showing soil nutrient.Described keyswitch 14 is film key switch, and film key switch is for inputting instruction.
Further, as shown in Figure 1, described microprocessor 11 is also connected with data-carrier store 7, print module 8 and digital temperature sensor 13.Described microprocessor 11, its input end is connected with the output terminal of A/D change-over circuit, digital temperature sensor 13 respectively, and its output terminal is connected with the input end of print module 8, liquid crystal display 9 respectively; Its input/output terminal is connected alternately with data-carrier store 7, keyswitch 14 respectively, and its power input is connected with the output terminal of power supply 12; It is inner that described A/D change-over circuit is integrated in microprocessor 11.Preferably, the model of described digital temperature sensor is DS18B20.
Above-described embodiment is only be described preferred implementation of the present utility model; not scope of the present utility model is limited; under the prerequisite not departing from the utility model design spirit; the various distortion that those of ordinary skill in the art make the technical solution of the utility model and improvement, all should fall in protection domain that the utility model claims determine.
Claims (5)
1. based on a soil nutrient tacheometer for LED light source, it is characterized in that: comprise light channel structure, photoelectric detective circuit and shell (5);
Described light channel structure comprises circular cell (1), several LED light sources (2), several photoelectric sensors (3) and several spike interference filters (4); Cuvette is provided with in described circular cell (1); The quantity of described LED light source (2), photoelectric sensor (3) and spike interference filter (4) is equal, and described LED light source (2) and photoelectric sensor (3) one_to_one corresponding are arranged on the periphery of circular cell (1), described spike interference filter (4) is positioned between circular cell (1) and photoelectric sensor (3);
Described photoelectric detective circuit comprises signal conditioning circuit (10), pH electrode (6), A/D change-over circuit, microprocessor (11), liquid crystal display (9), keyswitch (14) and power supply (12); Described signal conditioning circuit (10), its input end is connected with the output terminal of photoelectric sensor (3), pH electrode (6) respectively, and its output terminal is connected with the input end of A/D change-over circuit; The output terminal of described A/D change-over circuit is connected with the input end of microprocessor (11).
2. a kind of soil nutrient tacheometer based on LED light source according to claim 1, is characterized in that: the quantity of described LED light source (2), photoelectric sensor (3), spike interference filter (4) is 4.
3. a kind of soil nutrient tacheometer based on LED light source according to claim 1, is characterized in that: described photoelectric sensor (3) is silicon photocell.
4. a kind of soil nutrient tacheometer based on LED light source according to claim 1, is characterized in that: the bandwidth of described spike interference filter (4) is 10nm.
5. a kind of soil nutrient tacheometer based on LED light source according to claim 1, is characterized in that: described microprocessor (11) is also connected with data-carrier store (7), print module (8) and digital temperature sensor (13); Described microprocessor (11), its input end is connected with the output terminal of A/D change-over circuit, digital temperature sensor (13) respectively, its output terminal is connected with the input end of print module (8), liquid crystal display (9) respectively, its input/output terminal is connected alternately with data-carrier store (7), keyswitch (14) respectively, and its power input is connected with the output terminal of power supply (12); It is inner that described A/D change-over circuit is integrated in microprocessor (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420505461.XU CN204154635U (en) | 2014-09-03 | 2014-09-03 | A kind of soil nutrient tacheometer based on LED light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420505461.XU CN204154635U (en) | 2014-09-03 | 2014-09-03 | A kind of soil nutrient tacheometer based on LED light source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204154635U true CN204154635U (en) | 2015-02-11 |
Family
ID=52512739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420505461.XU Active CN204154635U (en) | 2014-09-03 | 2014-09-03 | A kind of soil nutrient tacheometer based on LED light source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204154635U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105136174A (en) * | 2015-08-04 | 2015-12-09 | 宁波摩米创新工场电子科技有限公司 | Digitalized photoelectric detection system based on linear modulation and demodulation circuit |
-
2014
- 2014-09-03 CN CN201420505461.XU patent/CN204154635U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105136174A (en) * | 2015-08-04 | 2015-12-09 | 宁波摩米创新工场电子科技有限公司 | Digitalized photoelectric detection system based on linear modulation and demodulation circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203275394U (en) | Water quality detector | |
| CN102928254B (en) | Intelligent water sampler | |
| CN110031437A (en) | A kind of trace level high-accuracy portable dissolved oxygen measuring device based on fluorescence method | |
| CN106546647A (en) | A kind of intelligent telemetering dissolved oxygen meter and its implementation based on NB IoT | |
| CN205941509U (en) | Air water quality detector based on thing networking | |
| CN204154635U (en) | A kind of soil nutrient tacheometer based on LED light source | |
| CN202256140U (en) | Multispectral water quality analyzer | |
| CN205620404U (en) | Portable self -powered water quality testing module | |
| CN201788147U (en) | Optical-fiber probe type soil nutrient tester | |
| CN103645223A (en) | Self-cleaning double-channel online dissolved oxygen instrument | |
| CN204142739U (en) | A kind of novel portable pH tester | |
| CN204556561U (en) | Pond ammonia density wireless detecting probe | |
| CN105675517A (en) | Portable equipment for rapid water quality detection and detection method | |
| CN109725122A (en) | A kind of handheld water quality detecting device | |
| CN205607431U (en) | Digital atmospheric pressure temperature humidity measurement documentation appearance | |
| CN204740222U (en) | Gaseous detector in room | |
| CN203870103U (en) | Handheld type soil water content detection device | |
| CN209727921U (en) | Water quality detection system | |
| CN203069744U (en) | Semiconductor triode parameter tester | |
| CN206627444U (en) | A kind of Nitrogen dioxide testing instrument based on fluorescent nano material | |
| CN204944606U (en) | Liquid level detection system | |
| CN104034756A (en) | Portable diarrhetic-algal-poison detector based on nerve cell sensor | |
| CN202196064U (en) | Alcohol detector with function of measuring body temperature | |
| CN206102625U (en) | Blue tooth body temperature meter | |
| CN108225408A (en) | A kind of cultivation factory environment measuring terminal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |