Passive distance measuring method of infrared thermal imager
A technology of infrared thermal imaging camera and distance measuring method, which is applied in the direction of measuring distance, instruments, measuring devices, etc., and can solve the problems of poor concealment, easy detection by targets, unfavorable use, etc.
Inactive Publication Date: 2015-09-23
山东神戎电子股份有限公司
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[0003] However, the above three methods are all active emission types, which have poor concealment, are not conducive to use, and are easy to be detected by targets
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[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0032] Such as figure 1As shown, the principle diagram of the passive ranging method of the infrared thermal imaging camera of the present invention is given. In the process of monitoring a fixed scene by the infrared thermal imaging camera, clear imaging and observation of far and near targets can be realized through the focus adjustment of the infrared lens. . A potentiometer for precise feedback on the position of the focus motor is set on the infrared thermal imager, and the voltage value output by the potentiometer can reflect the current position information of the focus motor. Observe that when the target is clear, the focus motor is in the corresponding position. At this time, the voltage value output by the potentiometer corresponding to the focus motor has a one-to-one correspondence with the target distance.
[0033] A specific embodiment o...
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A passive distance measuring method of an infrared thermal imager is characterized in that a potentiometer for measuring the rotating angle of a focusing motor is arranged on the infrared thermal imager, and the voltage value output by the potentiometer indicates the current focusing position of the focusing motor and corresponds to the far and near focusing degree of the infrared thermal imager to a target; according to the passive distance measuring method, the distance of the currently observed target is calculated through acquisition of the output value of the potentiometer, and passive measurement of the target distance is realized. With the adoption of the distance measuring method, on the basis of the principle that the infrared thermal imager with the unchanged monitoring scene observes far and near targets through focusing, the potentiometer capable of measuring the rotating angle of the focusing motor is arranged, the distance of the currently observed target can be calculated accurately through measurement of the voltage value output by the potentiometer, and passive measurement of the target distance is realized. The method has that characteristics of clear imaging, stable performance, high hiddenness and difficulty in discovery, and around-the-clock monitoring can be realized.
Description
technical field [0001] The invention relates to a passive distance measuring method for an infrared thermal imager, more specifically, to a passive distance measuring method for an infrared thermal imager that measures the target distance through calculation through accurate positioning of the rotating position of a focusing motor. Background technique [0002] With the current technological development, range finders can be divided into the following three categories from the basic principles of distance measurement: laser range finders, ultrasonic range finders, and infrared range finders. The laser rangefinder is an instrument that uses laser to accurately measure the distance of the target. When the laser range finder is working, it emits a very thin laser beam to the target, and the photoelectric element receives the laser beam reflected by the target. The timer measures the time from the launch to the reception of the laser beam, and calculates the distance from the ob...
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CPCG01C3/00
Inventor 刘涛张培娜丁鉴彬董术永马兴才
Owner 山东神戎电子股份有限公司