Calorimeter's hardware circuit design
Abstract
This design introduced one kind of new calorimeter. this calorimeter is based on the MCS-51 monolithic integrated circuit. mainly by the flow sensor, the temperature sensor, the monolithic integrated circuit three parts is composed. The temperature signal measurement electric circuit is calorimeter's temperature measurement part, it by three end manostats (MC7806), the temperature sensor (Cu100), differentiator amplifier (AD620) and a/D switch (AD1674) is composed. Flow measurement's principle may divide into two kinds approximately, namely the direct measurement current capacity's way and asks the speed of flow to be multiplied by the plan area first through the speed of flow to ask ways again and so on current capacity. Monolithic integrated circuit MCS-51 composes primarily the basic module is this system's hard core, mainly completes the signal which gathers to the system to carry on related processing, is coordinated other modules, causes work which the overall system marches in step. Based on the above part, designs a set to use in measuring the thermal intelligent low power loss calorimeter system. Enables system's current consumption to achieve as far as possible is smallest, and the parameter can demonstrate through the LED nixietube. As soon as this design elaborated calorimeter's hardware and the software design in detail, the success design applies mechanically the MCS-51 control the intelligent calorimeter. This calorimeter is in inlays microprocessor's intellectualization measuring instrument, compares with the traditional mechanical measuring appliance has the structure simply, safe reliable, timeliness to be good, the sensitivity is high; The power loss is low, overall system's dynamic power loss only then about 50uA, about static power loss only luA, only then above people's good guarantee use battery power supply 5 years; Operates easily, the user may inquire all data and the information through a pressed key, and on LED demonstrated that the result is direct-viewing. Compares the cost with the traditional measuring appliance to reduce greatly, moreover the anti-jamming good, installs the maintenance to be convenient, the measuring accuracy is high, has the high performance/price ratio.
Keywords:; Calorimeter; Monolithic integrated circuit; Flowmeter; Temperature sensor; Flow senso