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Laser triangulation sensor

A laser triangulation ranging and sensor technology, applied in the field of sensors, can solve problems such as uneven resolution, and achieve the effects of improving signal-to-noise ratio, improving measurement accuracy, and improving spot imaging quality

Active Publication Date: 2011-08-10
常州高晟传感技术有限公司
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Problems solved by technology

[0005] The present invention aims at the above-mentioned deficiencies existing in the prior art, and provides a laser triangulation ranging sensor, in which a non-axisymmetric lens is added to the receiving lens group, and the nonlinearity of the laser triangulation ranging sensor is corrected in principle, thereby solving the problem of resolution uneven problem

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Embodiment Construction

[0019] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0020] Such as Figure 1-Figure 2 As shown, this embodiment includes: a housing 1, a laser 2, a transmitting mirror group 3, a receiving mirror group 4, a photosensitive device 5 and a signal processing device 6, wherein: the laser 2, the transmitting mirror group 3 and the measured target 7 are arranged in a straight line Arranged at the transmitting end, the receiving mirror group 4 and the photosensitive device 5 are arranged at the reflecting end, the receiving mirror group 4 and the photosensitive device 5 are located on the same side of the laser 2 and the emitting mirror group 3 and are on the same side as t...

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Abstract

The invention discloses a laser triangulation sensor in the technical field of optical measurement. The laser triangulation sensor comprises a laser, a transmitting lens group, a receiving lens group, a photosensitive device and a signal processing device, wherein the laser, the transmitting lens group and a measured target are linearly arranged at the transmitting end; the receiving lens group and the photosensitive device are arranged at the reflecting end; the receiving lens group and the photosensitive device are arranged at the same side of the laser and the transmitting lens group and are located in the same plane with the laser and the transmitting lens group; and the signal processing device is connected with the photosensitive device for receiving electric signals. In the invention, non-axisymmetrical lenses are added in the receiving lens group, so that nonlinearity of the laser triangulation sensor is corrected in principle, and the problem of nonuniform resolution is solved.

Description

technical field [0001] The invention relates to a sensor in the technical field of optical measurement, in particular to a laser triangulation ranging sensor. Background technique [0002] The displacement sensor based on the principle of laser triangulation has excellent characteristics such as non-contact, high precision, large range, high reliability, and no strict requirements on the measured target. In the traditional laser triangulation ranging method, the imaging position of the laser spot on the photosensitive device has a nonlinear relationship with the displacement of the object. Especially in the case of large measurement range, nonlinearity is particularly serious. In the previous design, there are several nonlinear correction methods used: look-up table method, the relationship between the imaging position of the laser spot on the photosensitive device and the displacement of the object is pre-calibrated, and a data table is made according to a certain interval...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/02
Inventor 赵辉陶卫刘伟文张海波周盈聂晨晨
Owner 常州高晟传感技术有限公司
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