Velocity sensor based on optic fiber transmission and method thereof
A technology of speed sensor and optical fiber transmission, which is applied to devices using optical methods, signal transmission systems, non-electrical signal transmission systems, etc. It can solve the problem that the signal acquisition and processing units are not completely separated, and the electromagnetic interference of the speed sensor is not fundamentally solved. problems, to avoid electromagnetic radiation and conduction interference, lossless transmission, and accurate reflection
Inactive Publication Date: 2012-07-04
CRRC QINGDAO SIFANG CO LTD
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Problems solved by technology
[0005] Although the above-mentioned prior art can improve the influence of high-voltage surge or electromagnetic interference to a certain extent, it does not fundamentally solve the electromagnetic interference received by the speed sensor. The reason is that the signal acquisition and processing units are not completely separated, and the speed monitoring signal and Transmission is based on electrical signals
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Embodiment 1
[0033] Example 1, such as Figure 1 to Figure 3 As shown, the speed sensor based on optical fiber transmission includes:
[0034] The signal acquisition unit installed on the axle box of the bogie, and the signal processing unit arranged above the bogie frame. Wherein, the signal processing unit has,
[0035] The light source module is used to transmit optical signals to the signal acquisition unit through the optical fiber channel 4 , and an optical fiber bundle 9 is arranged in the optical fiber channel 4 .
[0036] The power module is used to provide power to the signal acquisition unit and the signal processing unit;
[0037] The signal processing module is used to receive the optical signal fed back by the signal acquisition unit through the optical fiber channel 4 and convert the optical signal into an electrical signal provided to the vehicle equipment.
[0038] The signal acquisition unit has a mounting seat 6 installed on the axle box, a wheel core 12 is set on the...
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The invention relates to a velocity sensor based on optic fiber transmission and a method of the velocity sensor, wherein a split structure of a signal acquisition unit and a signal processing unit is adopted; a velocity sensing signal is produced by light changing between light and shade; and the velocity sensing signal is converted to an electric signal after being transmitted by an optic fiber to the signal processing unit. Due to the transmission of the light signal and the conversion treatment of the light signal and the electric signal on a vehicle, the zero-attenuation and lossless transmission is achieved in the electromagnetic environment, and a velocity signal is prevented from being subjected to electromagnetic radiation and conducted interference in the transmission process. The velocity sensor comprises the signal acquisition unit arranged below the vehicle and the signal processing unit arranged on the vehicle, and the signal processing unit is provided with a light source module, a power supply module and a signal processing module. The signal acquisition unit is provided with a turntable which is connected on an axle and rotates along with the axle, a through hole is arranged on the turntable, and two optic fiber collimators are respectively arranged at the two sides of the through hole.
Description
technical field [0001] The invention relates to a speed sensor based on optical fiber transmission for rail vehicles and a method thereof, belonging to the technical field of rail transportation and electrical control. Background technique [0002] At present, the speed of rail vehicles running on main railways in China has reached 380 kilometers per hour and above, so more stringent design and performance requirements are put forward for vehicle power and control systems. [0003] Vehicle electrical control systems are generally affected by high-voltage surges or electromagnetic interference. For example, the speed sensor that monitors the vehicle's driving status and speed will usually experience accidents such as serial speed, speed loss, and even burnout due to interference. What's more serious is that the high-voltage surge formed by the speed sensor between the bogie and the car body will also be transmitted to the interior of other on-board equipment, causing problems...
Claims
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IPC IPC(8): G01P3/36G08C23/06
Inventor 肖石吴冬华龚明马云双
Owner CRRC QINGDAO SIFANG CO LTD