| This research has designed one kind of automatic control chemistrytitration apparatus, has solved in chemistry the constant solutionconcentration titrate automatic control question. It mainly includesprobe head, based on MSP430 low power integrated circuit's interfacecircuit, as well as micro injection pump constitution.This research main solution's question lies in the following threeaspects:1. Uses the compound glass electrode. The compound glass electrode uses in the automatic titrator examining the solution the potential of hydrogen, and transforms the solution potential of hydrogen as the weak electrical signal, through turning on high-resistance, floats the blading to put lowly can withdraw the high accuracy the electrical signal, sends in the monolithic integrated circuit to carry on the data processing. Also includes the temperature sensor in the compound glass electrode interior, may transform the solution temperature value into the resistance value, delivers like the monolithic integrated circuit after the temperature compensation electric circuit to carry on the data processing.2. Uses the MSP430 series integrated circuit to carry on the data the analysis processing. Has the low voltage, low power , stable active status, as well as merits and so on convenience highly effective development environment.3. Uses the micro injection pump to carry on the titrate. In the automatic titrator process, through the monolithic integrated circuit control micro injection pump, carries on the solution the high accuracy titrate. When operates the micro injection pump, adds in the first rated voltage Yu Beng coil (suction stroke), then the power failure (discharges stroke), so circulates. Used the micro injection pump not only to enhance instrument's reliability, and might output the micro liquid precisely. The micro injection pump especially qualify applies in does not need the self-absorption characteristic the precise assignment. |
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