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PH controller with strong adaptability

An adaptable and control instrument technology, applied in the instrument field, can solve problems such as limited application range and difficult promotion, and achieve the effect of wide application range, large change range, and large voltage range

Pending Publication Date: 2021-04-09
SHUNCHANG COUNTY HONGRUN PRECISION INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to improve the application capability of the pH controller, a pH controller designed with two temperature compensation signals has appeared at this stage to be compatible with aqueous solut

Method used

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  • PH controller with strong adaptability
  • PH controller with strong adaptability
  • PH controller with strong adaptability

Examples

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Embodiment Construction

[0031] Below in conjunction with accompanying drawing, the specific embodiment of the pH controller with strong adaptability of the present invention is described in detail:

[0032] like figure 1 As shown, a pH controller with strong adaptability includes pH sampling circuit 100, temperature compensation sampling circuit 200, MCU control unit 300 and display unit 400, pH sampling circuit 100, temperature compensation sampling circuit 200 and display unit 400 are respectively It is connected with the MCU control unit 300 for signals. like image 3 and Figure 4 As shown, the temperature compensation sampling circuit 200 includes a voltage converter Q1, four full-rail operational amplifiers U4 and several resistors. In the amplifier U4, the resistor R5 is connected in series between the non-inverting input terminal of the first operational amplifier U4-1, the inverting input terminal of the first operational amplifier U4-1 is connected in series with the resistor R9 and grou...

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Abstract

The invention discloses a PH controller with strong adaptability, which comprises a PH sampling circuit, a temperature compensation sampling circuit, an MCU control unit and a display unit, the PH sampling circuit, the temperature compensation sampling circuit and the display unit are respectively in signal connection with the MCU control unit, and the temperature compensation sampling circuit comprises a voltage converter Q1, a four-way full-swing operational amplifier U4 and a plurality of resistors. The PH controller with high adaptability can be compatible with acquisition of four temperature compensation signals, allows switching access of the four temperature compensation signals when the PH value of an aqueous solution is measured at different temperatures, meets temperature compensation of PH measurement under various working conditions, and is wide in application range and flexible to use.

Description

technical field [0001] The invention relates to the technical field of instruments, in particular to a pH controller with strong adaptability. Background technique [0002] PH controller is a highly intelligent online continuous monitor, which is mainly used to monitor and control the pH value of water quality, and is widely used in sewage treatment, environmental monitoring, food hygiene and household tap water testing. The PH value of the water quality is closely related to the temperature of the aqueous solution. In order to accurately measure the PH value of the aqueous solution, the temperature of the aqueous solution is usually compensated. At this stage, there are two main methods of temperature compensation for the pH controller. One is to use software to manually compensate, that is, in the Manually set a fixed temperature value in the PH controller to compensate, and the other is to connect an external temperature sensor for real-time compensation. Since the monit...

Claims

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Application Information

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IPC IPC(8): G05D21/02
CPCG05D21/02
Inventor 林善平陈志扬魏小东
Owner SHUNCHANG COUNTY HONGRUN PRECISION INSTR