Automatic dilution system

Abstract

This invention proposes an automatic dilution system comprising a mixing container, a dilution valve, a first valve, a second valve, a weight sensor, and a controller. It can monitor weight changes in real time during the dilution process, control the injection time and sequence of the diluent and the original solution based on a calculated and set weight, and determine whether the mixed solution falls within the allowable range by allowing it to stand and then re-measuring the weight. If the weight value is abnormal, the system can immediately stop the process or issue an error warning, eliminating the need for manual identification and correction. This aims to solve the problem of not being able to immediately confirm whether abnormalities have occurred during the preparation process, and the inefficiency caused by the need for manual re-identification and adjustment when errors occur.

Claims

1. An automatic dilution system comprising: a mixing container having an opening; a dilution mixing tube having a dilution input end and a dilution output end, the dilution output end being connected to the opening of the mixing container; a dilution valve disposed on the dilution mixing tube; a first mixing tube having a first input end and a first output end, the first output end being connected to the opening of the mixing container; a first valve disposed on the first mixing tube; and a first stock solution container having a first opening; wherein, The first input end of the first mixing tube is connected to the first opening of the first stock solution container; a weight sensor; wherein the mixing container is disposed on the weight sensor; a controller electrically connected to the dilution valve, the first valve, and the weight sensor; wherein, when the controller receives a first start signal, the controller calculates the weight of a first diluent solution and the weight of a first stock solution according to the first start signal, and the controller calculates a first diluent solution injection time according to the weight of the first diluent solution, and opens the dilution valve for the first diluent solution injection time, and after the controller waits for a first diluent solution to stand for a period of time, the controller receives a weight signal of the first mixing container from the weight sensor, calculates the weight of the first mixed solution according to the weight signal of the first mixing container, and the controller determines whether the weight of the first mixed solution falls within a first allowable range according to the weight of the first diluent solution; When the weight of the first mixed solution falls within the first permissible range, the controller calculates a first stock solution injection time based on the weight of the first stock solution, opens the first valve for the first stock solution injection time, and waits for a first stock solution settling time. Then, the controller receives the weight signal of the first mixing container from the weight sensor and calculates the weight of the first mixed solution based on the first mixing container weight signal. The controller also determines whether the weight of the first mixed solution falls within a second permissible range based on the weight of the first diluted solution and the weight of the first stock solution. When the weight of the first mixed solution falls within the second permissible range, the controller generates a first stock solution dilution completion signal. A status exclusion button is electrically connected to the controller. When the controller determines that the weight of the first mixed solution exceeds the first permissible range based on the weight of the first diluted solution, the controller generates a first diluted solution excess signal and determines whether it receives a status exclusion signal from the status exclusion button. Specifically, when the controller receives a status exclusion signal from the status exclusion button, the controller calculates the injection time of the first stock solution based on the weight of the first stock solution, opens the first valve to inject the first stock solution, and waits for the first stock solution to stand for a certain period of time. After that, the controller receives the weight signal of the first mixing container from the weight sensor, calculates the weight of the first mixed solution based on the weight signal of the first mixing container, and determines whether the weight of the first mixed solution falls within the second allowable range based on the weight of the first diluted solution and the weight of the first stock solution.

2. The automatic dilution system as described in claim 1 further comprises: a low-level sensor electrically connected to the controller to sense whether a liquid in the mixing container is below a first level; wherein, When the liquid level is lower than the first liquid level, the low liquid level sensor generates a low liquid level warning signal, and the controller generates a low liquid level stop signal based on the low liquid level warning signal.

3. The automatic dilution system as described in claim 1 further comprises: a high-level sensor electrically connected to the controller to sense whether a liquid in the mixing container is above a second level; wherein, When the liquid level is higher than the second liquid level, the high liquid level sensor generates a high liquid level warning signal, and the controller generates a high liquid level stop signal based on the high liquid level warning signal.

4. The automatic dilution system as described in claim 1 further includes: an emergency stop button electrically connected to the controller; wherein, When the controller receives an emergency interrupt signal generated by the emergency stop button, the controller generates an emergency stop signal based on the emergency interrupt signal.

5. The automatic dilution system as claimed in claim 1, further comprising: a second mixing tube having a second input end and a second output end, the second output end being connected to the opening of the mixing container; a second valve disposed on the second mixing tube; and a second stock solution container having a second opening; wherein, The second input end of the second mixing tube is connected to the second opening of the second stock solution container; wherein, when the controller receives a second start signal, the controller calculates the weight of a second diluent solution and the weight of a second stock solution based on the second start signal, and the controller calculates a second diluent solution injection time based on the weight of the second diluent solution, and opens the dilution valve for the second diluent solution injection time, and after the controller waits for a second diluent solution to stand for a period of time, the controller receives a weight signal of the second mixing container from the weight sensor, calculates the weight of the second mixed solution based on the weight signal of the second mixing container, and the controller determines whether the weight of the second mixed solution falls within a third allowable range based on the weight of the second diluent solution; Specifically, when the weight of the second mixed solution falls within the third permissible range, the controller calculates a second stock solution injection time based on the weight of the second stock solution, opens the second valve for the second stock solution injection time, and waits for a second stock solution settling time. After that, the controller receives the weight signal of the second mixing container from the weight sensor, calculates the weight of the second mixed solution based on the weight signal of the second mixing container, and determines whether the weight of the second mixed solution falls within a fourth permissible range based on the weight of the second diluted solution and the weight of the second stock solution. When the weight of the second mixed solution falls within the fourth permissible range, the controller generates a second stock solution dilution completion signal.

6. The automatic dilution system as described in claim 1, wherein, When the controller determines that the weight of the first mixed solution exceeds the second allowable range based on the weight of the first diluted solution and the weight of the first stock solution, the controller generates a first stock solution excess signal and determines whether it receives a status exclusion signal generated by the status exclusion button; wherein, when the controller receives a status exclusion signal generated by the status exclusion button, the controller generates a first stock solution dilution completion signal.

7. The automatic dilution system as described in claim 5 further includes: a condition exclusion button electrically connected to the controller; wherein, When the controller determines that the weight of the second mixed solution exceeds the third allowable range based on the weight of the second diluent solution, the controller generates a second diluent excess signal and determines whether it receives a situation clearance signal generated by the situation clearance button. Specifically, when the controller receives the situation clearance signal generated by the situation clearance button, the controller calculates the second stock solution injection time based on the weight of the second stock solution, opens the second valve for the second stock solution injection time, and waits for the second stock solution to stand for a certain period. Then, the controller receives the weight signal of the second mixing container from the weight sensor, calculates the weight of the second mixed solution based on the weight signal of the second mixing container, and determines whether the weight of the second mixed solution falls within the fourth allowable range based on the weight of the second diluent solution and the weight of the second stock solution.

8. The automatic dilution system as described in claim 7, wherein, When the controller determines that the weight of the second mixed solution exceeds the fourth allowable range based on the weight of the second diluted solution and the weight of the second stock solution, the controller generates a second stock solution excess signal and determines whether it receives a status exclusion signal generated by the status exclusion button; wherein, when the controller receives a status exclusion signal generated by the status exclusion button, the controller generates a second stock solution dilution completion signal.

9. The automatic dilution system as described in claim 5 further comprises: a human-machine interface electrically connected to the controller; and a start button electrically connected to the human-machine interface; wherein, When the start button is pressed, the human-machine interface (HMI) generates a start signal. Upon receiving the start signal, the controller controls the HMI to display a start screen, which includes an option to dilute a first stock solution and an option to dilute a second stock solution. When the first stock solution dilution option is selected and the start button is pressed continuously for more than a first time, the HMI generates the first start signal. When the second stock solution dilution option is selected and the start button is pressed continuously for more than the first time, the HMI generates the second start signal. When the start button is pressed continuously for more than a second time, the HMI generates a cancel signal, where the second time is longer than the first time. Upon receiving the cancel signal, the controller generates a dilution stop signal and closes the dilution valve, the first valve, and the second valve accordingly.

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