CN205879856U

CN205879856U - Solution nitrogen concentration on -line measuring device

Info

Publication number: CN205879856U
Application number: CN201620582237.XU
Authority: CN
Inventors: 蔡竞慧
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-06-14
Filing date: 2016-06-14
Publication date: 2017-01-11
Anticipated expiration: 2026-06-14

Abstract

The utility model discloses a solution nitrogen concentration on -line measuring device, including the test electrolytic bath and control platform, the last core processor of installing of control platform, the test is the splendid attire solution that awaits measuring in the electrolytic bath, installs ion selective electrode and reference electrode in the test electrolytic bath, ion selective electrode is connected with the voltage signal modulate circuit, the output of voltage signal modulate circuit still is connected with the AD converter, and the AD converter is connected to the core processor, the core processor is connected with current controller, and current controller's output is connected to reference electrode, and the obs core control ware still is connected with protection circuit, automatic alarm and power module, and the other end of protection circuit is connected to current controller's input, the core processor still is connected with liquid crystal display, reference electrode is last still to install temperature sensor, and temperature sensor is connected to the core processor, the preceding stage of voltage signal modulate circuit is voltage follower, and voltage follower's back level is connected with the in -phase amplifier.

Description

A kind of solution Different Nitrogen Concentration on-line measuring device

Technical field

This utility model relates to fertilizer monitoring technical field, is specially a kind of solution Different Nitrogen Concentration on-line measuring device.

Background technology

About the detection of certain nutrient composition in solution or nutritional solution, laboratory chromatographic is currently mainly had to analyze method And ion selective electrode method, wherein chromatogram analysis method is to carry out Analysis of Nutritive Composition on the basis of periodically sampling, it is impossible to Detect nutrient composition in real time, thus cannot be used for real-time monitoring nutrient composition concentration proportioning；Ion selective electrode method profit By the ion selectivity of electrode film and characteristic that ion concentration can be converted to membrane potential, can be used for realizing nutritional solution several The on-line checking of nutritional labeling (N, K, Ga etc.), but ion selective electrode is easily affected by operating ambient temperature, and ion selects electricity There is cross-sensitivity in pole.

Utility model content

For problem above, this utility model provides a kind of solution Different Nitrogen Concentration on-line measuring device, it is possible to realize real Time on-line checking, and do not affected by working environment, good stability, can effectively be solved the problem in background technology.

For achieving the above object, this utility model provides following technical scheme: a kind of solution Different Nitrogen Concentration on-line checking fills Put, including test electrolyzer and control platform, control, on platform, core processor is installed, be loaded with in described test electrolyzer Being provided with ion selective electrode and reference electrode in solution to be measured, and test electrolyzer, ion selective electrode connects has voltage to believe Number modulate circuit, the outfan of voltage signal conditioning circuit is also associated with A/D converter, and the outfan of A/D converter connects Data input pin to core processor；Described core processor connects current controller, and the outfan of current controller Being connected to reference electrode, core controller is also associated with protection circuit, autoalarm and power module, and protection circuit is another One end is connected to the input of current controller.

As a kind of preferably technical scheme of this utility model, described core processor uses MSP430 single-chip microcomputer, and core Heart processor is also associated with LCDs.

As a kind of preferably technical scheme of this utility model, described reference electrode is also equipped with temperature sensor, and Temperature sensor is connected to core processor.

As a kind of preferably technical scheme of this utility model, the prime of described voltage signal conditioning circuit is voltage follow Device, the rear class of voltage follower connects in-phase amplifier.

Compared with prior art, the beneficial effects of the utility model are: this solution Different Nitrogen Concentration on-line measuring device, pass through Arrange core processor to automatically analyze, and shown in real time by LCDs, voltage signal conditioning circuit is set, By improving input impedance, amplifying voltage multiplication, improve the precision of measurement result；Temperature sensor 13 is set, it is achieved closed loop is anti- Feedback controls；This apparatus structure is simple, it is possible to realizes real-time online detection, and is not affected by working environment, good stability, is suitable to push away Extensively.

Accompanying drawing explanation

Fig. 1 is this utility model structural representation；

Fig. 2 is this utility model circuit structure block diagram.

In figure: 1-tests electrolyzer；2-core processor；3-ion selective electrode；4-reference electrode；5-voltage signal is adjusted Reason circuit；6-A/D transducer；7-current controller；8-voltage follower；9-protection circuit；10-autoalarm；11-power supply Module；12-LCDs；13-temperature sensor；14-in-phase amplifier；15-controls platform.

Detailed description of the invention

Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not under making creative work premise The every other embodiment obtained, broadly falls into the scope of this utility model protection.

Embodiment:

Referring to Fig. 1 and Fig. 2, this utility model provides a kind of technical scheme: a kind of solution Different Nitrogen Concentration on-line checking fills Put, including test electrolyzer 1 and control platform 15, control, on platform 15, core processor 2, described test electrolyzer 1 are installed Inside it is loaded with in solution to be measured, and test electrolyzer 1 and ion selective electrode 3 and reference electrode 4, ion selective electrode 3 are installed Connect and have voltage signal conditioning circuit 5, the outfan of voltage signal conditioning circuit 5 to be also associated with A/D converter 6, and A/D conversion The outfan of device 6 is connected to the data input pin of core processor 2；Described core processor 2 connects current controller 7, and The outfan of current controller 7 is connected to reference electrode 4, and core controller 2 is also associated with protection circuit 9, autoalarm 10 With power module 11, and the other end of protection circuit 9 is connected to the input of current controller 7.

Described core processor 2 uses MSP430 single-chip microcomputer, and core processor 2 is also associated with LCDs 12；Institute State and on reference electrode 4, be also equipped with temperature sensor 13, and temperature sensor 13 is connected to core processor 2；Described voltage is believed The prime of number modulate circuit 5 is voltage follower 8, and the rear class of voltage follower 8 connects in-phase amplifier 14.

Operation principle of the present utility model: described test electrolyzer 1 is used for containing solution to be measured, and carries out cell reaction； Described core processor 2 is used for analyzing and processing the data collected and being shown in LCDs 12 by existing concentration, And control current controller 7 and adjust output electric current；Described ion selective electrode 3 specific ion has selectivity, and can will be somebody's turn to do Particular ion concentration is converted to membrane potential, ion selective electrode 3 and reference electrode 4 and forms electrochemical cell, reference electrode 4 conduct The zero potential point of this electrochemical cell, then can make the output signal electricity directly as this electrochemical cell of ion selective electrode 3 Kinetic potential；Described voltage signal conditioning circuit 5 is for nursing one's health the output signal of ion reference electrode 3, and wherein voltage follower 8 improves The input impedance of signal conditioning circuit, voltage signal is amplified by in-phase amplifier 14, sends into A/D converter 6, and A/D changes Analog quantity is converted into digital quantity by device 6, and is sent to core processor 2；Temperature sensor 13 gathers current liquid temperature, and will Temperature signal direct transport way core processor 2；When described protection circuit 9 situations such as over-voltage and over-current occurs at circuit, automatically cut Power-off pressure, and trigger autoalarm 10 and send alarm；Described power module 11 is the electrode in core processor 2 and electrolyzer Power supply.

This solution Different Nitrogen Concentration on-line measuring device, automatically analyzes by arranging core processor 2, and passes through liquid crystal Display screen 12 shows in real time, arranges voltage signal conditioning circuit 5, by improving input impedance, amplifying voltage multiplication, improves The precision of measurement result；Temperature sensor 13 is set, it is achieved closed loop feedback controls；This apparatus structure is simple, it is possible to realize in real time On-line checking, and do not affected by working environment, good stability, be suitable to promote.

The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all at this Any amendment, equivalent and the improvement etc. made within the spirit of utility model and principle, should be included in this utility model Protection domain within.

Claims

1. a solution Different Nitrogen Concentration on-line measuring device, including test electrolyzer (1) and control platform (15), controls platform (15) core processor (2) is installed on, it is characterised in that: it is loaded with solution to be measured, and test in described test electrolyzer (1) Being provided with ion selective electrode (3) and reference electrode (4) in electrolyzer (1), ion selective electrode (3) connects has voltage signal to adjust Reason circuit (5), the outfan of voltage signal conditioning circuit (5) is also associated with A/D converter (6), and A/D converter (6) is defeated Go out end and be connected to the data input pin of core processor (2)；

Described core processor (2) connects current controller (7), and the outfan of current controller (7) is connected to reference electricity Pole (4), core controller (2) is also associated with protection circuit (9), autoalarm (10) and power module (11), and protection electricity The other end on road (9) is connected to the input of current controller (7).

A kind of solution Different Nitrogen Concentration on-line measuring device the most according to claim 1, it is characterised in that: described core processing Device (2) uses MSP430 single-chip microcomputer, and core processor (2) is also associated with LCDs (12).

A kind of solution Different Nitrogen Concentration on-line measuring device the most according to claim 1, it is characterised in that: described reference electrode (4) it is also equipped with temperature sensor (13) on, and temperature sensor (13) is connected to core processor (2).

A kind of solution Different Nitrogen Concentration on-line measuring device the most according to claim 1, it is characterised in that: described voltage signal The prime of modulate circuit (5) is voltage follower (8), and the rear class of voltage follower (8) connects in-phase amplifier (14).