阅读说明：本技术 环境pH智能测量系统及测量方法 (Environment pH intelligent measuring system and measuring method ) 是由 刘家朋 于 2021-08-24 设计创作，主要内容包括：本发明涉及实验室自动化技术领域,公开了一种环境pH智能测量系统,包括机架和机架上设置的清洗区、校准区、保护区和样品区,所述样品区设置容器架,容器架上布置容器阵列,容器内预布置样品,所述机架上方设置机械臂,所述机械臂上安装有pH电极、清洗管和注液管,以及开合盖机构,所述清洗区用于将pH电极清洗并吹干,所述校准区对pH电极检测精度进行调整,所述保护区用于存放非工作状态的pH电极。本发明还公开了相应的测量方法。本发明实现全自动全流程对土壤样品的pH检测处理。(The invention relates to the technical field of laboratory automation, and discloses an intelligent environment pH measuring system which comprises a rack, and a cleaning area, a calibration area, a protection area and a sample area which are arranged on the rack, wherein the sample area is provided with a container frame, a container array is arranged on the container frame, a sample is prearranged in a container, a mechanical arm is arranged above the rack, a pH electrode, a cleaning pipe, a liquid injection pipe and a cover opening and closing mechanism are arranged on the mechanical arm, the cleaning area is used for cleaning and drying the pH electrode, the calibration area is used for adjusting the detection precision of the pH electrode, and the protection area is used for storing the pH electrode in a non-working state. The invention also discloses a corresponding measuring method. The invention realizes the full-automatic full-flow pH detection treatment of the soil sample.)

1. The utility model provides an environment pH intelligence measurement system which characterized in that: the device comprises a rack and a cleaning area, a calibration area, a protection area and a sample area which are arranged on the rack, wherein the sample area is provided with a container frame, a container array is arranged on the container frame, a sample is pre-arranged in the container, a mechanical arm is arranged above the rack, a pH electrode, a cleaning pipe, a liquid injection pipe and a cover opening and closing mechanism are arranged on the mechanical arm, the cleaning area is used for cleaning and drying the pH electrode, the calibration area is used for adjusting the detection precision of the pH electrode, the protection area is used for storing the pH electrode in a non-working state, the mechanical arm is used for respectively injecting liquid after the container in the sample area is uncovered through the liquid injection pipe, the cover closing is carried out after the liquid injection is finished, the container in the sample area is stirred and mixed, after the mixing is finished, the mechanical arm is used for respectively detecting the container in the sample area after the container is uncovered through the pH electrode, the cover is closed after the detection is finished, and the pH electrode is cleaned through the cleaning pipe in the cleaning area, and then carrying out cycle detection.

2. The intelligent environmental pH measurement system of claim 1, wherein: 2 to 5 pH electrodes are arranged on the mechanical arm, each pH electrode is correspondingly provided with a cleaning pipe, a liquid injection pipe and a cover opening and closing mechanism, stations of the cleaning area, the calibration area and the protection area also correspond to the number of the pH electrodes, and containers in the sample area are integral multiples of the number of the pH electrodes.

3. The intelligent environmental pH measurement system according to claim 2, wherein: each station in the cleaning area is provided with a cleaning hole, a drain hole is arranged below the cleaning hole, and a blow-drying hole is formed in the side edge of the cleaning hole.

4. The intelligent environmental pH measurement system according to claim 2, wherein: and three calibration cups are arranged at each station of the calibration area, buffer solutions with pH values of 4.01, 7.00 and 9.21 are respectively injected into the calibration cups, and the buffer solution in each calibration cup is more than or equal to 25 mL.

5. The intelligent environmental pH measurement system according to claim 2, wherein: and each station of the protection area is provided with a protection cup, each protection cup is filled with protection liquid, and the height of the protection liquid enables the pH electrode to be completely immersed.

6. The ambient pH intelligent measurement system according to any one of claims 1 to 5, characterized in that: a stirring motor is arranged below the container frame, a magnetic stirrer is arranged in the container, and a rotor of the stirring motor is provided with a corresponding magnetic pole.

7. The ambient pH intelligent measurement system according to any one of claims 1 to 5, characterized in that: the cleaning area, the calibration area and the protection area are respectively arranged on the side edges of the sample area, and the mechanical arm is a suspension type mechanical arm.

8. The ambient pH intelligent measurement system according to any one of claims 1 to 5, characterized in that: the frame is provided with a display device, the display device is connected to a control unit of the environment pH intelligent measurement system, and the display device displays the working state and the measurement result of the environment pH intelligent measurement system.

9. An environment pH intelligent measurement method, applying the environment pH intelligent measurement system according to any one of claims 1 to 8, characterized in that: the method comprises the following steps:

(1) initializing each device;

(2) the mechanical arm moves to a calibration area to calibrate the pH electrode;

(3) arranging containers filled with samples on the container frame;

(4) the mechanical arm moves to the sample area, and the container is respectively subjected to cover opening, liquid injection and cover closing operations;

(5) stirring the sample in the container by a stirring motor, and standing after stirring;

(5) the mechanical arm moves to a cleaning area to clean the pH electrode;

(6) the mechanical arm moves to the sample area, the container is respectively subjected to cover opening, pH test and cover closing operation, and the pH electrode is cleaned after each test;

(7) after all tests are completed, the mechanical arm is moved to the protection area, and the pH electrode is immersed into the protection solution.

10. The intelligent measurement method of environmental pH according to claim 9, characterized in that: the step (1) comprises the step of calibrating the pH electrode:

(a) cleaning the pH electrode;

(b) respectively placing the pH electrode in an acidic calibration cup, a neutral calibration cup and an alkaline calibration cup for measurement, recording the measured values, and cleaning the pH electrode each time the calibration cup is replaced;

(c) and comparing the measured value with the standard value, recording, comparing the information of the last calibration with the measured value, and determining a corrected value.

Technical Field

The invention relates to the technical field of laboratory automation, in particular to an environment pH intelligent measurement system and a measurement method.

Background

The laboratory sample pH value detection is mainly completed through manual operation at present, and in the process of environmental pH measurement, the manual operation needs to complete a plurality of process steps such as sample packaging, liquid injection mixing and stirring, measurement statistics, pH electrode cleaning and the like.

Taking the measurement of 500 samples per day in the laboratory at present as an example, 4-6 operators are needed to complete the basic test, and the work intensity is very high. Besides the large number of mechanical, repetitive operations, tedious work performed by the operator, the detection also results in poor consistency and stability.

The main object of environmental pH measurement is soil, the accuracy of the detection result directly influences the accuracy of environmental evaluation, and the effective execution of large items such as land improvement is influenced subsequently.

Disclosure of Invention

The invention aims to solve the problems and provides an environment pH intelligent measurement system and a measurement method, which are used for realizing full-automatic full-flow pH detection treatment on a soil sample.

The technical scheme adopted by the invention is as follows:

an environment pH intelligent measurement system is characterized by comprising a rack and a cleaning area, a calibration area, a protection area and a sample area which are arranged on the rack, wherein the sample area is provided with a container frame, a container array is arranged on the container frame, a sample is pre-arranged in the container, a mechanical arm is arranged above the rack, a pH electrode, a cleaning pipe and a liquid injection pipe are installed on the mechanical arm, and a cover opening and closing mechanism is arranged on the mechanical arm, the cleaning area is used for cleaning and drying the pH electrode, the calibration area is used for adjusting the detection precision of the pH electrode, the protection area is used for storing the pH electrode in a non-working state, the mechanical arm is used for injecting liquid after the container in the sample area is opened through the liquid injection pipe, the cover closing is carried out after the liquid injection is finished, the containers in the sample area are stirred and mixed, the mechanical arm is used for detecting the containers in the sample area after the container is opened through the pH electrode, the cover closing is carried out after the detection is finished, and cleaning the pH electrode in the cleaning area through a cleaning pipe, and performing circulating detection.

Furthermore, 2 to 5 pH electrodes are arranged on the mechanical arm, each pH electrode is correspondingly provided with a cleaning pipe, a liquid injection pipe and a cover opening and closing mechanism, stations of the cleaning area, the calibration area and the protection area also correspond to the number of the pH electrodes, and containers in the sample area are integral multiples of the number of the pH electrodes.

Furthermore, each station in the cleaning area is provided with a cleaning hole, a drain hole is arranged below the cleaning hole, and a blow-drying hole is arranged on the side edge of the cleaning hole.

Furthermore, three calibration cups are arranged at each station of the calibration area, buffer solutions with pH values of 4.01, 7.00 and 9.21 are respectively filled in the calibration cups, and the buffer solution in each calibration cup is more than or equal to 25 mL.

Furthermore, each station of the protection area is provided with a protection cup, each protection cup is filled with protection liquid, and the height of the protection liquid enables the pH electrode to be completely immersed.

Furthermore, a stirring motor is arranged below the container frame, a magnetic stirrer is arranged in the container, and a rotor of the stirring motor is provided with a corresponding magnetic pole.

Further, the cleaning area, the calibration area and the protection area are respectively arranged on the side edges of the sample area, and the mechanical arm is a suspension type mechanical arm.

Further, a display device is arranged on the rack and connected to a control unit of the environment pH intelligent measurement system, and the display device displays the working state and the measurement result of the environment pH intelligent measurement system.

An environment pH intelligent measurement method is characterized by comprising the following steps:

(1) initializing each device;

(2) the mechanical arm moves to a calibration area to calibrate the pH electrode;

(3) arranging containers filled with samples on the container frame;

(4) the mechanical arm moves to the sample area, and the container is respectively subjected to cover opening, liquid injection and cover closing operations;

(5) stirring the sample in the container by a stirring motor, and standing after stirring;

(5) the mechanical arm moves to a cleaning area to clean the pH electrode;

(6) the mechanical arm moves to the sample area, the container is respectively subjected to cover opening, pH test and cover closing operation, and the pH electrode is cleaned after each test;

(7) after all tests are completed, the mechanical arm is moved to the protection area, and the pH electrode is immersed into the protection solution.

Further, the step (1) comprises the step of calibrating the pH electrode:

(a) cleaning the pH electrode;

(b) respectively placing the pH electrode in an acidic calibration cup, a neutral calibration cup and an alkaline calibration cup for measurement, recording the measured values, and cleaning the pH electrode each time the calibration cup is replaced;

(c) and comparing the measured value with the standard value, recording, comparing the information of the last calibration with the measured value, and determining a corrected value.

The invention has the beneficial effects that:

(1) the method is fully automatically operated, and a series of operations such as liquid adding, oscillation, cleaning, calibration, testing and the like from a soil sample are realized;

(2) unattended operation is realized for 24 hours, and the working efficiency is high;

(3) the number of actual operators is reduced.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is a schematic top view of the present invention;

FIG. 3 is a rear view of the present invention;

fig. 4 is a rear perspective view of the present invention.

The reference numbers in the drawings are respectively:

1. a frame; 2, a cleaning area;

3. a calibration zone; 4, a protection area;

5. a sample area; 6, a pH electrode;

7. a mechanical arm; 8, cleaning the pipe;

9. a liquid injection pipe; 10, a cover opening and closing mechanism;

11. a container rack; 12, a container;

13. cleaning hole sites; 14, calibrating the cup;

15. a protective cup; a display device.

Detailed Description

The following describes in detail specific embodiments of the environment pH intelligent measurement system and the measurement method according to the present invention with reference to the accompanying drawings.

Referring to the attached drawings 1 to 4, the environment pH intelligent measurement system comprises a rack 1 and a cleaning area 2, a calibration area 3, a protection area 4 and a sample area 5 which are arranged on the rack 1, wherein the functions of the areas are mainly that the cleaning area 2 is used for washing and drying a pH electrode 6, and the interference of liquid stained on the pH electrode 6 on the next measurement is avoided. The calibration zone 3 is used for periodically or at designated times calibrating the pH electrode 6, the calibration being done by means of standard test solutions. The protective zone 4 is used for protection of the pH electrode 6 in the non-operating state. The sample area 5 is used for placing a detection sample, and various operations and detections on the sample are realized in the sample area 5.

The sample area 5 occupies most of the position of the housing 1, the washing area 2 and the calibration area 3 are located at the front position of the sample area 5, and the protection area 4 is located at the side position of the sample area 5.

A mechanical arm 7 is arranged above the rack 1, the mechanical arm 7 is in a cantilever design, and the moving range relates to each functional area. The mechanical arm 7 is provided with a pH electrode 6, a cleaning pipe 8, an injection pipe 9 and a cover opening and closing mechanism 10.

The number of pH electrodes 6 on the mechanical arm 7 is 3 in the figure, so that a group of tests of 3 samples are realized, and the cleaning area 2, the calibration area 3 and the protection area 4 are also simultaneously processed corresponding to the 3 pH electrodes 6. Each pH electrode 6 is correspondingly provided with a cleaning pipe 8, a liquid injection pipe 9 and a cover opening and closing mechanism 10, the stations of the cleaning area 2, the calibration area 3 and the protection area 4 also correspond to the number of the pH electrodes 6, the containers 12 of the sample area 5 are integral multiples of the number of the pH electrodes 6, the number of the containers 12 of the sample area 5 in the figure is 45, the containers are divided into three groups, and each group is 5. The number of the pH electrodes 6 can be configured according to the size and design requirements of the equipment, and is preferably 2 to 5.

The sample area 5 is provided with a container frame 11, a container array is arranged on the container frame 11, a sample is pre-arranged in the container 12, a stirring motor is arranged below the container frame 11, a magnetic stirrer is arranged in the container 12, and a rotor of the stirring motor is provided with a corresponding magnetic pole. After the solvent is injected into the container 12, the stirring motor drives the magnetic stirrer to rotate, so that the stirring operation of the solution in the container 12 is realized.

Each station of the cleaning area 2 is provided with a cleaning hole position 13, a drain hole is arranged below the cleaning hole, and a blow-drying hole is arranged on the side edge of the cleaning hole. The cleaning process is that after the pH electrode 6 is conveyed into the cleaning hole, the cleaning pipe 8 on the mechanical arm 7 sprays cleaning liquid to wash the pH electrode 6, and after the cleaning process is completed, the fan blows the pH electrode 6 through the blow-drying hole.

Three calibration cups 14 are arranged at each station of the calibration area 3, buffer solutions with pH values of 4.01, 7.00 and 9.21 are respectively filled in the calibration cups, and the buffer solution in each calibration cup 14 is more than or equal to 25 mL. And during calibration, the electrodes are sequentially placed into the three solutions for measurement, and the measured value is compared with the standard value. When the measured value is within the allowable range of the standard value, the measurement result is adjusted by the software of the control unit so that the final result is closer to the true value. In addition, the calibration values of the previous times may be subjected to data analysis to confirm whether the pH electrode 6 is already out of the error range. In each calibration process, when the calibration buffer is switched, the operation of cleaning the pH electrode 6 is completed once.

Each station of the protection zone 4 is provided with a protection cup 15, each protection cup 15 is filled with a protection solution, and the height of the protection solution enables the pH electrode 6 to be completely immersed. When the electrode is in a non-working state, the pH electrode 6 is placed in the protective solution to prevent the influence on the measurement precision of the electrode.

A display device 16 is arranged on the machine frame 1, the display device 16 is connected to a control unit of the environment pH intelligent measuring system, and the display device 16 displays the working state and the measuring result of the environment pH intelligent measuring system. The background database records the result of each measurement.

The following describes the working process of the system, and firstly initializes the device, including the examination before starting up, and the content is: whether the pure water in the liquid adding cylinder is enough or not is judged. Whether bubbles exist in each liquid adding pipeline from the starting point to the end point; whether pure water for cleaning the electrodes is enough or not and whether the pure water is pure water or not. Whether the water level of the water in the pump for the constant-temperature water area meets the requirement is determined, and the water level requirement is within the range of 0-10cm below the uppermost circle of cooling pipe. If the instrument works continuously every day, the protection solution needs to be replaced for 2-3 days, and whether the electrode is completely soaked in the protection solution or not is judged. The buffer solution for calibration is replaced every 1-3 days, and so on.

The mechanical arm 7 is driven to move to the calibration area 3, the pH electrode 6 is calibrated, and the pH electrode 6 is cleaned in the calibration process, wherein the calibration process is carried out before work every day.

Meanwhile, a container 12 containing a sample is arranged on the container holder 11, the sample is placed in the container 12 in advance, and the system is equipped with different solvents such as pure water, acidic solution and the like according to different samples. The system performs the definition in software on the sample through the control unit and sets the relevant parameters.

The mechanical driving arm 7 moves to the sample area 5, the container 12 is respectively subjected to cover opening, liquid injection and cover closing operations, and the system controls parameters such as liquid injection amount and the like to match experiment requirements.

The stirring motor stirs the sample in the container 12, and stands after stirring. Parameters such as stirring time and rotating speed are carried out according to experimental requirements.

The mechanical arm 7 moves to the cleaning area 2 to clean the pH electrode 6; the mechanical arm 7 moves to the sample area 5, the container 12 is respectively subjected to cover opening, pH test and cover closing operations, and the pH electrode 6 is cleaned after each group of test is finished; after all tests are completed, the robotic arm 7 moves to the protected zone 4, submerging the pH electrode 6 into the protective solution.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.