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Precision temperature controller

A temperature controller and precise technology, applied in the direction of using electric means for temperature control, chemical instruments and methods, laboratory utensils, etc. The effect of widening the temperature control range

Inactive Publication Date: 2008-05-28
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it cannot be placed under a microscope, and the heating and cooling power is only controlled by switches and knobs, and it does not have the function of temperature measurement
It can no longer meet the requirements of the current laboratory for temperature control equipment

Method used

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Embodiment Construction

[0030] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0031] As shown in Figure 1 of the present invention, the platinum resistance Pt100 is placed in the heating and cooling device, and the resistance value of the platinum resistance Pt100 changes accordingly when the temperature changes. After the change is quantified by the AD conversion circuit, it is sent to the data processing unit for data processing After completion, the result is sent to the current drive amplifier circuit through the DA conversion circuit, so that the data becomes a current that controls the heating or cooling power, thereby changing the heat transfer power of the semi-conductor cooling sheet in the heating and cooling device to control the temperature. At the same time, the monitor provides a good man-machine interface, showing the current temperature, and the keyboard as an input device.

[0032] The schematic diagram of the AD conve...

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Abstract

A precise temperature control instrument belongs to the instrument for biological experiments, in particular to a device whose partial environmental temperature is precisely measured and controlled. The purpose of the invention is that the invention is suitable for being looked at under a microscope, and the invention has the advantages of refined circuit, excellent stability, and simple control. The invention comprises an AD transformation circuit, a data processing unit, a DA transformation circuit, an electric current drive amplifying circuit, and a heating and cooling device. The heating and cooling device comprises a culture dish, a carrier of the culture dish, a lower plate of the carrier, a clamping piece of the culture dish, and a freezing plate of a semi-conductor. The invention solves a problem of real-time control of a temperature condition under the viewing field of the microscope, and the invention provides an accurate temperature environment in order to research biology such as nematodes and the like, and the control precision can research +_ 0.2 degrees, the invention can simultaneously achieves heating and cooling, which greatly widen a temperature control range, and the invention is applicable in various life science researches which needs to be accurately controlled, in particular to research a warmth sensation mechanism of nematodes.

Description

technical field [0001] The invention belongs to instruments for biological experiments, in particular to a precision measurement and control device for local ambient temperature. Background technique [0002] The physical and chemical properties of substances and the activity of biological tissue cells are closely related to temperature, such as free radicals generated by pyrolysis, fluidity of membranes, etc. The role of temperature is not only to keep organisms alive, but also to maintain normal physiological activities. , accurate temperature measurement and control plays an important role in biological experiments. [0003] C. elegans is an idiosyncratic organism that contains fully differentiated tissues and a nervous system with a brain, and is ethologically It has the value of research and has increasingly become a model organism of behavioral plasticity that has attracted people's attention. At present, the research on the nematode's sense of touch, smell, and tast...

Claims

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Application Information

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IPC IPC(8): G05D23/19B01L7/00
Inventor 张海宁瞿安连徐涛
Owner HUAZHONG UNIV OF SCI & TECH
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