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Long-distance sensing device combining energy conversion sensor and optical fiber

A technology of energy conversion and sensing devices, which is applied in the direction of using electric/magnetic devices to transmit sensing components, etc., can solve problems such as susceptibility to electromagnetic interference, and achieve the effects of convenient installation and system design, simple installation, and strong applicability

Inactive Publication Date: 2014-04-09
武汉普瑞奇机电设备有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, there is no power supply in the field, and solar energy and batteries are generally used for power supply, but there are problems with its long-term reliability, and it is greatly affected by the weather environment; and if data is sent back through cables or wirelessly in the field, it needs to have power supply on site, and it is susceptible to electromagnetic interference.

Method used

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  • Long-distance sensing device combining energy conversion sensor and optical fiber
  • Long-distance sensing device combining energy conversion sensor and optical fiber
  • Long-distance sensing device combining energy conversion sensor and optical fiber

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Embodiment 1 is a long-distance Rogowski coil current sensing device.

[0024] like figure 2 As shown, the device of the present invention includes a Rogowski coil current sensor 6, a voltage-current conversion unit 7, an electro-optical conversion unit 2 using an LED driver module, a photoelectric conversion unit 3 using a PIN detector, a signal analysis and processing unit 4, and an optical cable 5.

[0025] The theoretical basis of Rogowski coil for measuring current is Faraday's law of electromagnetic induction and Ampere's loop law. It is directly proportional, that is, V(t)=A1*d I(t) / dt. The voltage-current conversion unit 7 linearly converts the voltage signal into a current signal. Assuming that the coefficient is A2, after passing through the voltage-current conversion unit 7, the current value for driving the LED is A1*A2*d I(t) / dt.

[0026] LED adopts 850nm wave band, and the corresponding optical cable 5 adopts multimode optical fiber. The output optical...

Embodiment 2

[0029] Embodiment 2 is a long-distance special magnetic induction sensor device for railways.

[0030] The electro-optical conversion unit 2 of this embodiment adopts an LD drive module, which can transmit a longer distance through a single-mode optical cable and monitor a longer range along the railway.

[0031] The energy conversion sensor 1 adopts a railway-specific magnetic induction sensor 8 for acquiring train passing signals. When the train wheel 13 passes the magnetic induction sensor 8, the internal magnetic field of the magnetic induction sensor 8 changes, and an induced electromotive force will be generated at both ends of the internal coil.

[0032] The internal structure of the magnetic inductive sensor 8 is as Figure 4 , wherein the protective cover 9 is aluminum or engineering plastics. The induction coil 12 is wound on the permanent magnet 10 . Utilizing the iron structure of the train wheel 13, when the train is running on the rails, the motion of the whe...

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Abstract

The invention relates to a long-distance sensing device combining an energy conversion sensor and an optical fiber. The long-distance sensing device comprises a sensing head, a host and a connection cable 5, wherein the sensing head comprises a current or voltage output energy conversion sensor 1 and an electricity and light conversion unit 2, the host comprises a photoelectric conversion unit 3 and a signal analysis and processing unit 4, and the connection cable 5 communicates the sensing head and the host. The energy conversion sensor 1 carries out corresponding current output when sensing changes of a physical quantity, and the output currents are used for driving the electricity and light conversion unit 2. Optical signals produced by the electricity and light conversion unit 2 are transmitted in a long distance through the connection cable 5 and then returned to be electric signals through the photoelectric conversion unit 3, signal analysis is carried out in the signal analysis and processing unit 4 and accordingly the measured physical quantity is analyzed. The long-distance sensing device is suitable for a large quantity of conventional energy conversion sensors so that the sensors can work in a long-distance environment without power supplies, has the advantages of being easy to install and high in adaptability, and brings great convenience for actual on-site installation and system design.

Description

technical field [0001] The invention relates to a long-distance sensing device combined with an energy conversion sensor and an optical fiber, which is used for passive sensing detection in special long-distance occasions. Background technique [0002] From the perspective of energy conversion, there are two types of sensors: energy conversion type and energy control type. Energy conversion sensors are mainly composed of energy conversion elements, which do not require an external power source, such as sensors based on piezoelectric effect, pyroelectric effect, photoelectric effect, Hall effect, etc., all belong to this type of sensor. Energy conversion sensors are capable of directly converting the measured energy into output energy, such as current and voltage. [0003] In many special occasions where the application site is relatively special, it is required that the sensing device can realize long-distance and on-site passive detection. For example, there is no power s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/56
Inventor 张萍赵建林张哲民原辉
Owner 武汉普瑞奇机电设备有限公司
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