A test system for instantaneous temperature rise and transmission loss of optical fiber composite low-voltage cables

Abstract

The invention discloses an instantaneous temperature rise and transmission loss test system for an optical fiber composite low-voltage cable. The test system comprises a temperature test module and an optical fiber unit loss monitoring module, wherein the relevant test point of the optical fiber composite low-voltage cable (9) is provided with a thermocouple; the temperature test module utilizes a multi-point thermocouple to be cooperated with a digital millivoltmeter (7) to monitor the temperature information of the position of the thermocouple; the optical fiber unit loss monitoring module uses a function signal generator (1), a laser source (2), a 2*2 optical fiber coupler (3) and an optical power meter (4) to monitor the transmission loss of an optical fiber unit (11) in the optical fiber composite low-voltage cable (9); and the collected temperature and the loss data are subjected to processing display on a processing display terminal (5). The test system has the advantages that the temperature change situation and the optical fiber unit transmission loss of each observation point in the cable can be quickly and accurately monitored when the instantaneous temperature rise is caused when the optical fiber composite low-voltage cable is under the abnormal working state.

Description

technical field [0001] The invention belongs to the field of optical fiber composite low-voltage cables, and in particular relates to a test system for instantaneous temperature and optical unit transmission loss of optical fiber composite low-voltage cables in an abnormal working state. Background technique [0002] Optical fiber composite low-voltage cable is a kind of cable that combines optical fiber units inside low-voltage power cables and has power transmission and optical communication transmission capabilities. It can be used in power systems with rated voltages of 0.6 / 1kV and below, and at the same time solve the problem of optical fiber information communication. Optical fiber composite low-voltage cable combines the functions of optical fiber communication and power transmission. Compared with single-function transmission cables, it has the characteristics of high reliability data transmission, low price, and convenient connection. Small space. Compared with oth...

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Problems solved by technology

In my country, fiber optic composite low-voltage cables are still in their infancy. Although domestic manufacturers have developed several fiber optic composite low-voltage cable products, the country has not yet issued relevant national standards. The relevant standards are still in the draft stage. , Physical and optical performance requirements and tests There is no mature and stable test method, especially when the abnormal working state of the optical fiber composite low-voltage cable causes an instantaneous temperature rise, there is no fast and accurate system for temperature changes and optical fiber unit transmission loss change to test

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