| 摘要 |
The present invention has a microprocessor, a head sensor, a graphic display and a keypad. When a distance between the heat sensor and heat source changes, a frequency of a wave pattern shown on the graphic display has high and low states. The user just sees the graphic display to clearly know whether the heat source close to the body from the frequency of wave pattern changing. Besides the heat detector further has at least one laser diode to point a position corresponding to the location of the heat source and an alarm unit to warn the user that the heat source is closing.
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