液货监测报警系统技术说明书

Liquid cargo monitoring alarm system technical specification

一、系统组成/ System composition

本系统主要由液货舱的液货监测系统（包含货舱压力、温度、液位传感器、高液位报警及溢流报警探头等）、泵组温度监测系统、货泵进出口压力监测系统、舱底水监测系统以及气体探测系统构成。     

The system is mainly composed of the liquid cargo monitoring system of the cargo tank (including cargo pressure, temperature, liquid level sensor, high level alarm and overflow alarm probe, etc.), the temperature monitoring system of the pump group, the pressure monitoring system of the cargo pump inlet and outlet, the bilge water monitoring system and the gas detection system

二、主要设备技术参数及功能描述/ Main equipment technical parameters and function description

2.1液货综合监测报警控制台/ Liquid cargo integrated monitoring alarm console

本控制台可兼容220V和24VDC两组电源供电，并具备任一失电报警提示功能；

The console can be compatible with 220V and 24VDC two groups of power supply, and has any power loss alarm function;

本系统集合了所有需要监测报警的数据并进行显示和报警，做到了集中监控并有效的将危险区域与安全区域分离开，大大提高了设备的安全性和稳定性。系统采用电脑显示模式，高位高高位报警系统独立方式。

The system collects all the data that need to be monitored and alarmed and displays and alarms, so as to achieve centralized monitoring and effectively separate the dangerous area from the safe area, which greatly improves the safety and stability of the equipment. The system adopts computer display mode, high and high alarm system independent mode

2.2 高位高高位监测报警系统/ High and high monitoring alarm system:                                      

主要利用磁性浮球对干簧管的吸合与断开来控制开关的通断以实现对液位高度的报警。根据舱底高度设置95%和98%两个报警高度值，液位在相应的报警值处时，控制系统将发出指令启动报警设备（声光报警器）进行报警，以起到提示作用，保障安全。

The magnetic float is mainly used to draw and disconnect the reed tube to control the switch on and off to realize the alarm of liquid level height. Two alarm height values of 95% and 98% are set according to the bilge height, and when the liquid level is at the corresponding alarm value, the control system will issue an instruction to start the alarm device (sound and light alarm) to alarm, so as to play a warning role and ensure safety.

2.3 货仓压力监测报警系统/ Warehouse pressure monitoring and alarm system:

基本原理：压力变送器选用进口压力芯片，敏感元件采用扩散或离子注入等工艺形成电阻并连接成惠斯通电桥，用微机械加工技术在电桥下形成压力敏感膜片。当压力作用在膜片上时，电阻值发生变化并且产生一个与作用压力成正比的线性化输出信号。我们在惠斯通电桥上加上直流电源，就会产生一个直流电压信号的输出。经过二次转换线路，实现两线制4～20MA输出。（本产品通常与液位高位及溢流报警器一体设计，使得产品结构更为优化，同时减少用户安装成本）

Basic principle: The pressure transmitter adopts imported pressure chip, the sensitive element adopts diffusion or ion implantation process to form resistance and connect to Wheatstone bridge, and the pressure sensitive diaphragm is formed under the electric bridge with micromachining technology. When pressure is applied to the diaphragm, the resistance value changes and produces a linearized output signal proportional to the applied pressure. When we add a DC power supply to the Wheatstone bridge, we produce an output of a DC voltage signal. Through the secondary conversion line, the two-wire system 4 ~ 20MA output is realized. (This product is usually designed with liquid level high and overflow alarm, which makes the product structure more optimized and reduces the installation cost of the user)

2.4 货仓液位监测报警系统/ Warehouse level monitoring and alarm system

液位测量主要采用两种方式：浮球液位计和雷达液位计测量方式。

There are two main ways to measure liquid level: float level meter and radar level meter.

浮球液位计主要由信号转换电路及传感器电路组成，传感器电路有磁性开关串联电阻形成不同阻值输出的阻抗电路，当外界介质带动浮球位移时。浮球中安装的磁铁会控制磁性开关进行分断的动作从而使得出接的电阻接入电路造成总体阻抗的变化,再经由后端的检测放大电路输出标准的信号数值发送给终端设备从而转化显示相对应的液位高度。

The float level meter is mainly composed of a signal conversion circuit and a sensor circuit. The sensor circuit has a magnetic switch series resistor to form an impedance circuit with different resistance values. When the external medium drives the float displacement. The magnet installed in the float will control the magnetic switch for breaking action, so that the outgoing resistance is connected to the circuit and the overall impedance is changed, and then the standard signal value is sent to the terminal device through the detection and amplification circuit at the back end to transform and display the corresponding liquid level height.

雷达液位计是基于时间行程原理的测量仪表，雷达波以光速运行，运行时间可以通过电子部件被转换成物位信号。探头发出高频脉冲在空间以光速传播，当脉冲遇到物料表面时反射回来被仪表内的接收器接收，并将距离信号转化为物位信号从而显示液位高度。

高/调频非接触式雷达液位计更加适用于浆料、沥青、原油等高粘度液体及颗粒料的物位连续测量，适用于对温度压力变化大、腐蚀性强等恶劣环，本身的非接触式结构，使得本款产品使用寿命长，精度高、可靠性强而且设备体积小、重量轻，安装方便，易于后期维护。

Radar level meter is a measuring instrument based on the principle of time travel. Radar waves travel at the speed of light, and the running time can be converted into level signals through electronic components. The probe sends out a high-frequency pulse to travel at the speed of light in space. When the pulse meets the surface of the material, it is reflected back by the receiver in the instrument, and the distance signal is converted into a level signal to show the liquid level height.

High/FM non-contact radar level meter is more suitable for continuous level measurement of slurry, asphalt, crude oil and other high viscosity liquids and particles, suitable for temperature and pressure changes, strong corrosion and other harsh rings, its own non-contact structure, making this product long service life, high precision, strong reliability and equipment small size, light weight, easy installation, easy maintenance.

2.5 货仓温度监测报警系统/ Warehouse temperature monitoring and alarm system

温度传感器的主要原理就是主要通过PT100电阻信号传输，通过电路板使得电阻信号转换成电信号，实现温度的测量显示。

The main principle of the temperature sensor is mainly through the PT100 resistance signal transmission, through the circuit board to convert the resistance signal into an electrical signal, to achieve temperature measurement and display.

2.6 货泵机组温度监测报警系统/ Cargo pump unit temperature monitoring and alarm system

温度传感器的主要原理就是主要通过PT100电阻信号传输，通过电路板使得电阻信号转换成电信号，实现温度的测量显示。

The main principle of the temperature sensor is mainly through the PT100 resistance signal transmission, through the circuit board to convert the resistance signal into an electrical signal, to achieve temperature measurement and display.

2.7机舱/货泵舱舱底水高位报警系统/ Engine room/cargo pump room high bilge alarm system

基本原理同（2.2），主要区别在于舱底水是单浮球控制，当污油水达到设定值时即可报警，以起到提示作用，保障安全。

The basic principle is the same as (2.2), the main difference is that the bilge water is controlled by a single float, and the alarm can be given when the contaminated water reaches the set value, so as to play a warning role and ensure safety.

2.8 货泵进出口压力监测报警系统/ Cargo pump inlet and outlet pressure monitoring and alarm system

基本原理同（2.3）：略。

Same basic principle (2.3) : omitted.

主要通过采集各货泵工作时的进口及出口压力数据来监控货泵的正常运行状态，为保障正常的工作的提供数据参考。

The normal operation status of the cargo pump is monitored mainly by collecting the inlet and outlet pressure data of each cargo pump during work, so as to provide data reference for ensuring normal work.

2.9可燃气体监测报警系统/ Combustible gas monitoring and alarm system

主要基本原理是采用进口传感器，可连续检测工作场所环境中可燃性气体最低爆炸极限以下的浓度。 它能输出与浓度成正比的4~20mADC信号，此信号引入货控系统，实现报警和连锁控制功能。

The main principle is the use of imported sensors, which can continuously detect the concentration of combustible gases in the workplace environment below the lowest explosion limit. It can output a 4~20mADC signal proportional to the concentration, which is introduced into the cargo control system to achieve alarm and chain control functions.

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