The invention relates to a device for measuring the multi-passage heat
conductivity, comprising two paths of independent power modules, an upper computer, a main control module, a
photon coupled isolation module, a
heat pulse control and excitation module, a multi-passage control module and a temperature collection module. The upper computer is respectively connected with a singlechip of the main control module and a
multimeter in the temperature collection module through a
USB; each I / O in the singlechip is respectively connected with the
heat pulse control and excitation module, the multi-passage control module and the temperature collection module after being subjected to photo coupled isolation; the device is provided with two constant-
current source circuits and adopts
closed loop feedback to realize power constant value output; the multi-passage control module comprises a heating module and a measuring module which both have eight paths of passages; and the main control module selects any passage for collecting, preserving and calculating data in real time. The device has the advantages of convenient measurement, little error, high efficiency, and the like, meets the requirement of high-precision heat
conductivity test, and can be further used for testing and researching the heat
conductivity of
solid body,
powder,
biological tissue, and the like.