Laser Institute of Shandong Academy of Science

Laser Institute, Shandong Academy of Sciences

Tongyu Liu

Yanong Ning

Zhen Li

Yuan Liu

Lin Zhao

Moyu Hou

Jiqiang Wang

Guangxian Jin

Guofeng Dong

Wei Zhang

Bo Cai

Dehu Li

Yuhui Feng

Yanfang Li

Tingting Zhang

Jiamin Wang

A two-dimensional multi-point-reflection long-optical-path gas sensor probe includes: a protecting housing and a multi-point total reflection type long-optical-path module arranged in the protecting housing. The multi-point total reflection type long-optical-path module includes two right-angle reflecting prisms or mirror pairs spaced at a set distance, and inclined surfaces of the right-angle reflecting prisms or mirror pairs are oppositely arranged and parallel to each other. A set deviation exists between center lines of the two right-angle reflecting prisms or mirror pairs, and the deviation can enable light beams parallel to the center lines to be reflected for a set number of times between the two right-angle reflecting prism or mirror pairs, so as to form a two-dimensional parallel light beam group. Thereby increasing a measurement optical path of gas absorption, which is beneficial to improve the detection signal-to-noise ratio and the measurement accuracy.

Two-dimensional multi-point-reflection long- optical-path gas sensor probe and gas sensor

A gas sensor probe having multipoint reflection rectangular absorption cell, a VCSEL laser emitter and a detection device. The probe comprises: an upper cover plate, the surface of the upper cover plate being provided with gas diffusion holes, and a metal filtering screen being provided above the gas diffusion holes; a lower cover plate located under the upper cover plate and detachably connected to the upper cover plate, and an electric wire through hole being formed in the bottom of the lower cover plate; a light path module located in an internal space defined by the upper cover plate and the lower cover plate and used for modulating the laser emitter and collecting a detection signal; and an electronic processing circuit board located in the internal space defined by the upper cover plate and the lower cover plate, located below the light path module, electrically connected to the light path module, and used for processing the signal generated from the light path module.

Gas sensor probe having multipoint reflection rectangular absorption cell, and detection device

Disclosed is an optical fiber flow velocity measuring apparatus and method integrating high and low ranges. The apparatus includes an integrated optical fiber flow velocity sensor, the integrated optical fiber flow velocity sensor includes a sensor body; a fluid channel, a fluid through hole, a full-pressure channel, a static-pressure channel, a low-pressure chamber and a high-pressure chamber are provided inside the sensor body; a first optical fiber sensing element is provided between the low-pressure chamber and the high-pressure chamber; a second optical fiber sensing element is provided in the fluid through hole and is perpendicular to a flow direction of a fluid to be measured; the first optical fiber sensing element and the second optical fiber sensing element are sequentially connected in series through a single-mode optical fiber; both ends of the single-mode optical fiber are connected into a wavelength division multiplexer; a pump light source is connected with the wavelength division multiplexer through a common optical fiber; an optical fiber grating demodulator is connected with the wavelength division multiplexer through a common optical fiber; and a flow velocity arithmetic unit is electrically connected with a optical fiber grating demodulator. It's an object of the present disclosure to solve the problems that the electric circuit is too complicated and that it is not easy to integrate in one apparatus when flow velocity conversion devices based on different principles are integrated.

Optical fiber flow velocity measuring apparatus and method integrating high and low ranges

Described are a two-dimensional wind-speed and wind-direction sensor and a system thereof, relating to the field of sensing devices. The two-dimensional wind-speed and wind-direction sensor includes: an X-direction wind speed probe assembly and a Y-direction wind speed probe assembly, the X-direction wind speed probe assembly and the Y-direction wind speed probe assembly are perpendicular to each other, and the X-direction wind speed probe assembly is configured to measure a X-direction wind speed including a wind speed in the reverse direction of an X-axis, Vx&#x2212;, and a wind speed in the forward direction of the X-axis Vx+; and the Y-direction wind speed probe assembly is configured to measure a Y-direction wind speed including a wind speed in reverse direction of an Y-axis, Vy&#x2212;, and a wind speed in the forward direction of the Y-axis, Vy+.

Two-dimensional wind-speed and wind-direction sensor and system thereof

Growing community of inventors

Shandong, China

Tongyu Liu