阅读说明：本技术 基于分布式光纤测温技术的热处理安全联动装置 (Heat treatment safety linkage device based on distributed optical fiber temperature measurement technology ) 是由 杨志 高建 倪明刚 于 2019-07-31 设计创作，主要内容包括：本发明公开了基于分布式光纤测温技术的热处理安全联动装置,基于分布式光纤测温技术的热处理安全联动装置,包括分布式光纤测温系统、后台服务器、驱动单元、供电单元和气溶胶灭火系统,所述分布式光纤测温系统由光信号发射模块、光信号接收模块、光波分复用模块、DSP数据处理模块以及定标控温模块五个部分组成,所述分布式光纤测温系统与所述后台服务器进行无线连接,通过所述后台服务器对驱动单元进行控制,所述后台服务器向驱动单元发出开启灭火命令,所述驱动单元立即向所述气溶胶灭火系统发出灭火指令,气溶胶灭火系统自动开启灭火模式。本发明分布式光纤温度传感是一种新型的传感技术,可用来对结构体表面与内部的温度量进行监测,一般由信号分析仪和传感光栅两部分组成。(The invention discloses a heat treatment safety linkage device based on a distributed optical fiber temperature measurement technology, which comprises a distributed optical fiber temperature measurement system, a background server, a driving unit, a power supply unit and an aerosol fire extinguishing system, wherein the distributed optical fiber temperature measurement system consists of an optical signal transmitting module, an optical signal receiving module, an optical wavelength division multiplexing module, a DSP (digital signal processor) data processing module and a calibration temperature control module, the distributed optical fiber temperature measurement system is wirelessly connected with the background server, the driving unit is controlled by the background server, the background server sends a fire extinguishing starting command to the driving unit, the driving unit immediately sends a fire extinguishing command to the aerosol fire extinguishing system, and the aerosol fire extinguishing system automatically starts a fire extinguishing mode. The distributed optical fiber temperature sensor is a novel sensing technology, can be used for monitoring the temperature quantity on the surface and inside a structure, and generally comprises a signal analyzer and a sensing grating.)

1. Distributed optical fiber temperature measurement technology-based thermal treatment safety linkage device comprises a distributed optical fiber temperature measurement system, a background server, a driving unit, a power supply unit and an aerosol fire extinguishing system and is characterized in that the distributed optical fiber temperature measurement system is composed of five parts including an optical signal transmitting module, an optical signal receiving module, an optical wavelength division multiplexing module, a DSP (digital signal processor) data processing module and a calibration temperature control module, the distributed optical fiber temperature measurement system is wirelessly connected with the background server and controls the driving unit, the background server sends a fire extinguishing command to the driving unit, the driving unit immediately sends a fire extinguishing command to the aerosol fire extinguishing system, and the aerosol fire extinguishing system automatically opens a fire extinguishing mode.

2. The thermal treatment safety linkage device based on the distributed optical fiber temperature measurement technology according to claim 1, characterized in that: the background server displays the temperature condition of the monitored area and the state of each aerosol fire extinguishing system all the time, the background server can manually set the upper temperature limit, and sends a command of opening the fire extinguishing device to the driving unit in time when the temperature reaches the set upper limit, the background server integrates a powerful database and can record the historical data of the monitored area.

3. The thermal treatment safety linkage device based on the distributed optical fiber temperature measurement technology according to claim 1, characterized in that: the power supply unit is electrically connected with the driving unit, converts an alternating current 220V power supply of the control room into a 24V direct current working voltage, and introduces the 24V direct current working voltage into the driving unit.

4. The thermal treatment safety linkage device based on the distributed optical fiber temperature measurement technology according to claim 1, characterized in that: the aerosol fire extinguishing system is driven by 24V direct current working voltage given by the driving unit, fire extinguishing spray is arranged in the aerosol fire extinguishing system, and a fire extinguishing instruction is completed by releasing the fire extinguishing spray.

5. The thermal treatment safety linkage device based on the distributed optical fiber temperature measurement technology according to claim 1, characterized in that: the power supply unit and the driving unit are internally provided with power supply cables, and the power supply cables are set to military grade explosion-proof UPS power cables.

6. the thermal treatment safety linkage device based on the distributed optical fiber temperature measurement technology according to claim 1, characterized in that: the aerosol fire extinguishing system comprises a power supply unit, a driving unit, an aerosol fire extinguisher, an aerosol spray nozzle and an aerosol injection baffle, wherein the aerosol fire extinguisher is rotationally fixed at the lower side of the driving unit, and a nozzle of the aerosol fire extinguisher is matched with the inner end of the aerosol spray nozzle.

Technical Field

The invention relates to the technical field of safety monitoring of production areas, in particular to a heat treatment safety linkage device based on a distributed optical fiber temperature measurement technology.

Background

the heat treatment workshop belongs to inflammable and explosive danger area, and fire control safety is very important, and in case the fire accident takes place, the consequence is beyond the scope of assumption, therefore in time knows each security protection regional temperature and runs into danger alarm the quick start extinguishing device is very important.

The system lays the temperature sensing optical cables in each area needing temperature monitoring, monitors the temperature trend in real time, and when the temperature reaches an alarm condition, the system can automatically output an alarm signal, automatically starts an aerosol fire extinguishing system in a certain range simultaneously, and timely prevents the fire from spreading.

Disclosure of Invention

The invention aims to provide a heat treatment safety linkage device based on a distributed optical fiber temperature measurement technology, so as to solve the problems mentioned in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: distributed optical fiber temperature measurement technology-based thermal treatment safety linkage device comprises a distributed optical fiber temperature measurement system, a background server, a driving unit, a power supply unit and an aerosol fire extinguishing system, wherein the distributed optical fiber temperature measurement system is composed of five parts including an optical signal transmitting module, an optical signal receiving module, an optical wavelength division multiplexing module, a DSP data processing module and a calibration temperature control module, the distributed optical fiber temperature measurement system is in wireless connection with the background server, the background server controls the driving unit, the background server sends out a fire extinguishing command to the driving unit, the driving unit immediately sends out a fire extinguishing command to the aerosol fire extinguishing system, and the aerosol fire extinguishing system automatically opens a fire extinguishing mode.

Further, the background server displays the temperature condition of the monitored area and the state of each aerosol fire extinguishing system all the time, the background server can manually set the upper limit of the temperature, and sends a command of opening the fire extinguishing device to the driving unit in time when the temperature reaches the set upper limit, the background server integrates a powerful database and can record the historical data of the monitored area.

Further, the power supply unit is electrically connected with the driving unit, converts an alternating current 220V power supply of the control room into a 24V direct current working voltage, and introduces the 24V direct current working voltage into the driving unit.

As a further improvement of the invention, the aerosol fire extinguishing system is driven by 24V direct current working voltage given by the driving unit, fire extinguishing spray is arranged in the aerosol fire extinguishing system, and a fire extinguishing instruction is completed by releasing the fire extinguishing spray.

As a further improvement of the invention, a power supply cable is arranged inside the power supply unit and the drive unit, and the power supply cable is set as a military grade explosion-proof UPS power supply cable.

As a further improvement of the invention, the aerosol fire extinguishing system comprises a power supply unit, a driving unit, an aerosol fire extinguisher, an aerosol spray nozzle and an aerosol injection baffle, wherein the aerosol fire extinguisher is rotationally fixed at the lower side of the driving unit, and a nozzle of the aerosol fire extinguisher is matched with the inner end of the aerosol spray nozzle.

Compared with the prior art, the invention has the beneficial effects that: distributed optical fiber temperature sensing is a novel sensing technology, can be used for monitoring the temperature quantity on the surface and inside a structure, and generally comprises a signal analyzer and a sensing grating.

Compared with the traditional fire monitoring technology, the distributed optical fiber sensing temperature measurement monitoring system has the following advantages:

(1) Monitoring in real time and providing temperature analysis of the whole security area; the temperature condition of any position point reached by each sensing optical cable can be accurately given, and errors caused by theoretical modeling calculation are avoided.

(2) The alarm condition of the measured piece can be accurately positioned (1 m), and the fault at the abnormal temperature position can be conveniently checked.

(3) A constant temperature alarm, a temperature difference alarm, a temperature change rate alarm and a peak value alarm can be set.

(4) The cost of strain distribution monitoring is greatly reduced by adopting the communication optical cable; the installation is convenient, and one optical cable can monitor a range of dozens of kilometers at the same time.

(5) The sensing optical cable realizes photoelectric isolation, the sensing end does not need to be powered, the sensing optical cable is anti-corrosion and can work safely in severe environment.

(6) After the distributed optical fiber temperature measurement system monitors that the temperature is abnormal, the aerosol fire extinguishing system is started immediately to cut off a fire alarm source. In order to prevent the damage of a power supply cable when a fire disaster happens, a military-grade explosion-proof UPS power supply is selected for standby in the system.

Drawings

FIG. 1 is a block diagram of an embodiment of a thermal processing safety linkage based on distributed fiber optic thermometry in accordance with the present invention;

FIG. 2 is a schematic diagram of distributed optical fiber temperature measurement according to the present invention;

FIG. 3 is a formula diagram of the distributed optical fiber temperature measurement principle of the present invention;

FIG. 4 is a schematic diagram of a monitoring system arrangement according to the present invention;

fig. 5 is a schematic diagram of the aerosol fire extinguishing system of the present invention.

In the figure: 1. background server, 2, distributed optical fiber temperature measurement system, 3, aerosol fire extinguishing system, 301, power supply unit, 302, drive unit, 303, aerosol fire extinguisher, 304, aerosol shower nozzle, 305, aerosol injection baffle, 4, monitoring area.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention relates to a heat treatment safety linkage device based on a distributed optical fiber temperature measurement technology, which comprises: the system comprises a distributed optical fiber temperature measurement system, a background server, a driving unit, a power supply unit and an aerosol fire extinguishing system, wherein the distributed optical fiber temperature measurement system consists of a light signal transmitting module, a light signal receiving module, a light wavelength division multiplexing module, a DSP data processing module and a calibration temperature control module, the aerosol fire extinguishing system comprises a power supply unit, a driving unit, an aerosol fire extinguisher, an aerosol spray nozzle and an aerosol jet baffle, the aerosol fire extinguisher is rotationally fixed at the lower side of the driving unit, a nozzle of the aerosol fire extinguisher is matched with the inner end of the aerosol spray nozzle, the matched aerosol fire extinguisher is convenient to replace after use and is more convenient and rapid when detecting whether the aerosol fire extinguishing system can normally work, the system utilizes a semiconductor laser to generate a narrow pulse width light pulse signal to enter an optical fiber, and the generated Raman scattering light is coupled to a photoelectric detection module through the, due to the fact that anti-Stokes optical signals influenced by temperature are weak, conversion between the optical signals and the electric signals is conducted through a double-path micro-signal photoelectric detection APD and a signal amplification circuit, and data collection and preliminary demodulation are conducted on the corresponding voltage values after conversion through a DSP high-speed processing chip.

Wherein k is Boltzmann constant, h is Planckian constant, c is speed of light in vacuum, k is Boltzmann constant, and V0 is incident light frequency; t is absolute temperature, and from the above formula, it can be seen that to obtain the real-time temperature T of the environment where the optical fiber is located, T0 must be known, so a section of calibration optical fiber is introduced into the system, and for a fixed temperature (calibration temperature of the temperature control module), there are:

Therefore, it can be seen from the above formulas that the temperature information T is only a quantity related to the fixed parameters of the optical fiber and the calibration temperature, the spatial positioning of the temperature measurement point is realized by an Optical Time Domain Reflectometry (OTDR) technique, when a laser pulse is transmitted in the optical fiber, backscattering occurs due to microscopic inhomogeneity of the refractive index existing in the optical fiber, the time required for the incident light to return to the incident end of the optical fiber through the scattering point in the optical fiber is T, and the distance L between the scattering point in the optical fiber and the incident end of the optical fiber is represented by the following formula:

In the formula, V is the propagation speed of light in the optical fiber, C is the speed of light in vacuum, and n is the refractive index of the optical fiber, so that the optical time domain reflection technology can be used for determining the position of each temperature acquisition point in the optical fiber temperature field and the distance positioning information of an abnormal temperature point, an optical fiber fault point and a breakpoint.

the distributed optical fiber temperature measurement system is in wireless connection with the background server, the drive unit is controlled through the background server, the background server sends a fire extinguishing starting command to the drive unit, the drive unit immediately sends a fire extinguishing command to the aerosol fire extinguishing system, and the aerosol fire extinguishing system automatically starts a fire extinguishing mode.

The aerosol fire extinguishing system and the fiber bragg grating temperature sensor are arranged above a monitored area, the coverage area of the single aerosol fire extinguishing system after release has various specifications, such as 1m3, 4m3, 8m3, 16m3 and the like, the fire extinguishing device is in a completely closed stable state before activation, once activated, sprayed suspended particles can be rapidly diffused to the protected area, and a fire source is cut off in time.

The working principle is as follows: the power supply unit provides direct current voltage required by work for the driving unit, the alternating current 220V power supply of a control room is directly converted into 24V direct current working voltage, when the mains supply is powered off or the mains supply is too low, the uninterrupted explosion-proof power supply is switched to an emergency output state to provide electric energy for a load, the power supply unit has an explosion-proof characteristic, the fiber grating temperature sensor feeds back the temperature of a monitored area in real time to play a role of monitoring the temperature of the monitored area, monitors the temperature of the monitored area in real time, uploads temperature data to the background server in time for data processing of the background server, the driving unit judges whether to start the aerosol fire extinguishing system or not through a command of the background server, when the temperature fed back by the temperature sensor reaches a set abnormal value, the background server sends a fire extinguishing command to the driving unit, and the driving unit immediately sends a fire extinguishing command to the aerosol fire extinguishing system, the aerosol fire extinguishing system automatically starts a fire extinguishing mode.

the fire extinguishing mechanism of the aerosol fire extinguishing system is as follows: the solid fire extinguishing agent in the aerosol fire extinguishing system is electrically started, the solid fire extinguishing agent generates oxidation-reduction reaction to form a large amount of agglutinated fire extinguishing aerosol, the components of the agglutinated fire extinguishing aerosol mainly comprise N2, a small amount of CO2, metal salt solid particles and the like, and fire extinguishing work is carried out through three modes, firstly, gasified metal ions or cations losing electrons in the fire extinguishing aerosol can generate affinity reaction with active groups in combustion under the action of heat, a large amount of active groups are repeatedly consumed, combustion free radicals are reduced, secondly, the particle size of the fire extinguishing aerosol is small (10 < -9 > -10 < -6 > m), the particle size of the fire extinguishing aerosol is large in surface area and surface energy, the active groups in combustion can be adsorbed, chemical action is carried out, a large amount of active groups are consumed, the combustion free radicals are reduced, finally, the oxygen concentration in combustion can be reduced through N2 and CO2 in the fire extinguishing aerosol, but the, the fire extinguishing effect is far less than heat absorption, temperature reduction and chemical inhibition.

The aerosol fire extinguishing system is driven by 24V voltage given by the driver, and is rapidly triggered after receiving a signal, fire extinguishing spray is released to destroy combustion, fire spreading is prevented in time, and tiny fire extinguishing particles can be suspended in the air for a period of time after the spray is released, so that dead ash is prevented from being re-combusted. After the fire extinguishment is finished, the fire scene is easy to clean, and the spraying agent can not leave substances harmful to human bodies, is environment-friendly and pollution-free.

The backstage server is responsible for constantly showing by the regional temperature situation of monitoring and every aerosol fire extinguishing systems's state, can manually set up the temperature upper limit, in time send the order of opening extinguishing device to drive unit when the temperature reaches the upper limit that sets up, the backstage part can also select manually to open every aerosol fire extinguishing systems, it is convenient to switch, and is safe effective, and backstage software has still integrated powerful database, can take notes surveyed regional historical data to supply technical staff later stage analysis.

it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.