阅读说明：本技术 一种变电站端子箱进水或受潮自动报警装置 (Automatic warning device for water inlet or damp of terminal box of transformer substation ) 是由 张会波 卢会欣 马助兴 徐红元 王进考 张立硕 谷浩 康哲 张宝德 赵智龙 杨世 于 2021-08-13 设计创作，主要内容包括：本发明涉及一种变电站端子箱进水或受潮自动报警装置,包括设置在端子箱内的湿度检测装置、进水检测装置、湿度控制装置以及湿度调节装置；湿度报警装置包括光报警器,所述湿度检测装置包括湿度传感器,所述进水检测装置包括第一浸水传感器以及第二浸水传感器；湿度控制装置包括PLC控制器,所述湿度调节装置包括风机和电加热器；PLC控制器分别于电加热器、风机、湿度传感器、第一浸水传感器以及第二浸水传感器信号连接；本发明的有益效果是：当湿度传感器、第一湿度传感器或者第二湿度传感器探测的湿度超过设定的阈值时；控制器给光报警器、风机和电加热器发出启动信号,对端子箱内进行除湿并报警；防止湿度过大引起电气故障。(The invention relates to a transformer substation terminal box water inlet or damp automatic alarm device, which comprises a humidity detection device, a water inlet detection device, a humidity control device and a humidity adjusting device, wherein the humidity detection device, the water inlet detection device, the humidity control device and the humidity adjusting device are arranged in a terminal box; the humidity alarm device comprises an optical alarm, the humidity detection device comprises a humidity sensor, and the water inlet detection device comprises a first immersion sensor and a second immersion sensor; the humidity control device comprises a PLC controller, and the humidity adjusting device comprises a fan and an electric heater; the PLC is respectively in signal connection with the electric heater, the fan, the humidity sensor, the first immersion sensor and the second immersion sensor; the invention has the beneficial effects that: when the humidity detected by the humidity sensor, the first humidity sensor or the second humidity sensor exceeds a set threshold value; the controller sends starting signals to the light alarm, the fan and the electric heater, and dehumidifies and alarms the terminal box; prevent the electrical fault caused by the excessive humidity.)

1. A transformer substation terminal box water inlet or damp automatic alarm device is used for alarming water inlet or humidity in a terminal box (1); the method is characterized in that: comprises a humidity detection device, a water inlet detection device, a humidity control device, an alarm device and a humidity adjusting device (2) which are arranged in a terminal box (1); the humidity control device is respectively in signal connection with the humidity adjusting device (2), the alarm device, the water inlet detection device and the humidity detection device.

2. The automatic warning device that gets into water or wets of transformer substation terminal box of claim 1 characterized in that: the humidity alarm device comprises an optical alarm (3) arranged on the outer surface of the top of the terminal box (1), and the optical alarm (3) is in signal connection with the humidity control device.

3. The automatic warning device that gets into water or wets of transformer substation terminal box of claim 2 characterized in that: the humidity detection device comprises a humidity sensor (4) arranged in the middle of the inner surface of the top of the terminal box (1).

4. The automatic warning device that gets into water or wets of transformer substation terminal box of claim 3 characterized in that: the water inlet detection device comprises a first water immersion sensor (6) arranged at a position close to the bottom in the terminal box (1) and a second water immersion sensor (7) arranged at the bottom in the terminal box (1); the second water sensor (7) is used for detecting condensed water in the terminal box (1).

5. The automatic warning device that gets into water or wets of transformer substation terminal box of claim 4 characterized in that: the humidity control device comprises a controller (5).

6. The automatic warning device that gets into water or wets of transformer substation terminal box of claim 5 characterized in that: the controller (5) is a PLC controller.

7. The automatic warning device that gets into water or wets of transformer substation terminal box of claim 6 characterized in that: the humidity adjusting device (2) comprises a fan which is fixed on the side wall of the terminal box (1) and is communicated with the inside of the terminal box (1).

8. The automatic warning device that gets into water or wets of transformer substation terminal box of claim 7 characterized in that: the fan is provided with an air inlet end, and the air inlet end of the fan is provided with a filter screen.

9. The automatic warning device that gets into water or wets of transformer substation terminal box of claim 8 characterized in that: the fan is provided with an air outlet end, and the air outlet end is provided with an electric heater.

10. The automatic warning device that gets into water or wets of transformer substation terminal box of claim 9 characterized in that: the PLC controller is respectively in signal connection with the light alarm (3), the electric heater, the fan, the humidity sensor (4), the first immersion sensor (6) and the second immersion sensor (7).

Technical Field

The invention relates to the technical field of transformer substations, in particular to an automatic alarm device for water inlet or damp of a transformer substation terminal box.

Background

At present, various terminal boxes in a transformer substation are numerous, and in order to ensure that the terminal boxes work normally, the humidity in the terminal boxes needs to be checked regularly to prevent the terminal boxes from being electrified and exploding and firing due to too high humidity; at present, a large number of various terminal boxes are arranged in a transformer substation, a medium-sized transformer substation generally needs thousands of terminal boxes, the terminal boxes can be checked once every day, and in rainy seasons, especially in plum rain in the south, maintenance workers of the transformer substation need to frequently overtime and check the terminal boxes, so that improvement is continued; in order to solve the above problems, there is an urgent need for a device for detecting and maintaining humidity in a terminal box and automatically alarming.

Disclosure of Invention

The invention aims to provide an automatic alarm device for water inflow or damp of a terminal box of a transformer substation, which has the capabilities of quickly detecting humidity and automatically alarming.

In order to solve the technical problems, the invention provides the following technical scheme:

a kind of transformer substation terminal box enters the water or wets the automatic alarm device, is used in the terminal box and enters the water and humidity detection and warning; the humidity detection device, the water inlet detection device, the humidity control device and the humidity adjusting device are arranged in the terminal box; the humidity control device is respectively in signal connection with the humidity adjusting device, the water inlet detection device and the humidity detection device.

Further, the terminal box also comprises a humidity alarm device arranged on the outer surface of the top of the terminal box; the humidity alarm device comprises an optical alarm, and the optical alarm is in signal connection with the humidity control device.

Further, the humidity detection device comprises a humidity sensor arranged in the terminal box.

Furthermore, the water inlet detection device comprises a first water immersion sensor arranged at a position close to the bottom in the terminal box and a second water immersion sensor arranged at the bottom in the terminal box; the second water sensor is used for detecting condensed water in the terminal box.

Further, the humidity control device includes a controller.

Further, the controller is a PLC controller.

Further, the humidity adjusting device comprises a fan which is fixed with the side wall of the terminal box 1 and is communicated with the inside of the terminal box.

Furthermore, the fan is provided with an air inlet end, and the air inlet end of the fan is provided with a filter screen.

Further, the fan is provided with an air outlet end, and the air outlet end is provided with an electric heater.

Furthermore, the PLC controller is respectively connected with the electric heater, the fan, the first humidity sensor and the second humidity sensor through signals.

Compared with the prior art, the invention has the beneficial effects that:

1. through the arranged filter screen, excessive dust is prevented from remaining in the terminal box during air inlet to cause the fault of the terminal box wiring terminal, so that the problem of humidity is solved, and the problem of wiring terminal fault caused by excessive dust is avoided;

2. through the arranged fan and the electric heater, when the humidity in the terminal box exceeds a specified value, hot air can be automatically fed in to dehumidify the terminal box;

3. the PLC is respectively in signal connection with the electric heater, the fan, the humidity sensor, the first immersion sensor and the second immersion sensor; setting a humidity alarm threshold and a water immersion alarm threshold for a PLC controller, and when the humidity detected by a humidity sensor, a first humidity sensor or a second humidity sensor or the water immersion exceeds the set threshold; the controller sends a starting signal to the light alarm; simultaneously sending starting signals to the fan and the electric heater to dehumidify the terminal box; prevent the electrical fault caused by the excessive humidity.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a control schematic diagram of the present invention.

In the figure: the device comprises a terminal box 1, a humidity adjusting device 2, an optical alarm 3, a humidity sensor 4, a controller 5, a first immersion sensor 6 and a second immersion sensor 7.

Detailed Description

It should be noted at the outset that the discussion of any embodiment of the present invention is illustrative only and is not intended to suggest that the scope of the present disclosure (including the claims) is limited to these examples; there are many other variations of the different aspects of the invention as described above which are not provided in detail for the sake of brevity. Accordingly, other embodiments are within the scope of the following claims.

In addition, the drawings in the following description are only preferred embodiments of the present invention, and it is obvious to those skilled in the art that other drawings can be obtained based on the drawings without inventive efforts. In addition, the present invention is not limited to these embodiments, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Furthermore, in the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways than those described herein, and it will be apparent to those of ordinary skill in the art that the present application is not limited by the specific embodiments disclosed below.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., is typically an orientation or positional relationship based on a coordinate system shown in the front view of the device itself or the corresponding sub-component, and that the set of coordinate systems will not rotate with it when other directional views are discussed. In addition, in the case of a rod-like or elongated member, the term "front end" and the term "head" have the same meaning, and the term "rear end" and the term "tail end" and the term "end" have the same meaning. Rather, the foregoing directional terms are used merely to facilitate describing the present application and to simplify the description, and they do not indicate or imply that the apparatus or component being referred to must have a particular orientation or be constructed and operated in a particular orientation without having been stated to the contrary or otherwise specified, and therefore should not be considered limiting of the scope of the present application; further, the terms "inner and outer" with respect to orientation refer to the inner and outer relative to the profile of the respective component itself.

Furthermore, spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise oriented (rotated 40 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", etc. are used to define the components, and are only used to facilitate distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, especially, have no special meaning in "main, secondary" or arrangement order, and therefore, should not be construed as limiting the scope of the present application.

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Examples

Please refer to fig. 1-2

The embodiment provides an automatic alarm device for water inlet or damp of a terminal box of a transformer substation, which is used for detecting the humidity in the terminal box (1); the humidity detection device, the water inlet detection device, the humidity control device and the humidity adjusting device 2 are arranged in the terminal box 1; the humidity control device is respectively in signal connection with the humidity adjusting device, the water inlet detection device and the humidity detection device.

The terminal box also comprises a humidity alarm device arranged on the outer surface of the top of the terminal box 1; the humidity alarm device comprises an optical alarm 3, and the optical alarm 3 is in signal connection with the humidity control device.

The humidity detection device includes a humidity sensor 7 provided in the terminal box 1.

The water inlet detection device comprises a first immersion sensor 6 arranged at a position close to the bottom in the terminal box 1 and a second immersion sensor 7 arranged at the bottom in the terminal box 1; the second flooding sensor 7 is used to detect the condensate in the terminal box 1. The first flooding sensor 6 is used for detecting bottom flooding in the terminal box 1.

The humidity control means comprises a controller 5.

The controller 5 is a PLC controller.

The humidity adjusting device 2 comprises a fan which is fixed with the side wall of the terminal box 1 and is communicated with the inside of the terminal box 1.

The fan is provided with an air inlet end, and the air inlet end of the fan is provided with a filter screen.

The fan is provided with an air outlet end, and the air outlet end is provided with an electric heater.

A communication module is arranged in the PLC controller, and can perform data transmission with a control center through a 5G mobile network; the PLC is respectively in signal connection with the electric heater, the fan, the humidity sensor 7, the first immersion sensor 6 and the second immersion sensor 7; if the measured humidity value exceeds a set threshold value, starting the fan, then starting the electric heater, and dehumidifying the terminal box 1; when the humidity in the terminal box 1 is lower than a set threshold value, the electric heater is stopped first, and then the fan is stopped; the electric heater and the fan are interlocked in starting and stopping, namely, the electric heater is started after the fan is started; before the fan stops rotating, the electric heater stops heating; if first sensor 6 or second sensor 7 that soaks record and have water in the terminal box 1, then send a signal for the controller, after the controller received the signal, start light alarm 2 at once, transmit the signal to control center simultaneously, control center sends the instruction that the scene was looked over for the maintenance personal.

The PLC controller is a controller produced by Germany Siemens.

The programmable controller produced by SIEMENS (SIEMENS) of germany has wide application in China, and has application in the fields of metallurgy, chemical engineering, printing production lines and the like. PLC products of Siemens (SIEMENS) include LOGO, S4-200, S4-1200, S4-300, S4-700, S4-1500, etc. Siemens S4 series PLC has small volume, high speed, standardization, network communication capability, stronger function and high reliability. The S4 series PLC products can be divided into micro PLC (such as S4-200), PLC with small-scale performance requirement (such as S4-300) and PLC with medium and high performance requirement (such as S4-700).

The SIMATIC series PLC of Siemens, born in 1458, has gone through the series of C3, S3, S5 and S4, and has become a programmable controller with very wide application, the history thereof is developed,

1. the first product of siemens was SIMATIC S3 marketed in 1445, which was actually a binary controller with a simple operating interface.

2. In 1444, the S3 system was replaced by SIMATIC S5, which widely used microprocessors.

3. In the early 80S of the 20 th century, the S5 system was further upgraded to a U series PLC, which is a more common model: S5-40U, 45U, 100U, 115U, 135U, 155U.

7. 7 months in 1447, S4 series were born, it has advantages such as more internationalization, higher performance level, installation space is smaller, better WINDOWS user interface, its model is: s4-200, 300, 700.

5. In 1446, in the field of process control, siemens corporation proposed a concept of PCS4 (process control system 4), which integrated advantageous WINCC (WINDOWS compatible operation interface), PROFIBUS (industrial field bus), COROS (supervisory control system), SINEC (siemens industrial network) and control and regulation technologies.

6. Siemens corporation proposed tia (total Integrated automation) concepts, i.e., fully Integrated automation systems, to dissolve PLC technology in all areas of automation.

The S3 and S5 series of PLC gradually exit the market and stop production, while the S4 series of PLC is developed to be the control core of the Siemens automation system, and the TDC system adopts the SIMADYN D technical kernel, which is a further upgrade to the S4 series of products and is the most advanced programmable controller with the strongest function of the Siemens automation system;

the programmable controllers are produced by the requirement of modern production, and the classification of the programmable controllers also necessarily meets the requirement of the modern production.

Generally, programmable controllers can be classified from three perspectives. The first is to classify from the control scale of the programmable controller, the second is to classify from the performance of the programmable controller, and the third is to classify from the structural characteristics of the programmable controller;

the controller can be classified into a high-grade machine, a medium-grade machine and a low-grade machine according to performance.

Low gear machine

Such programmable controllers have basic control functions and general operational capabilities. The working speed is lower, and the number of input and output modules of the energy band is less.

For example, S4-200, manufactured by SIEMENS, Germany, belongs to this class.

Middle gear machine

The programmable controller has stronger control function and stronger computing capability. It can not only complete general logic operation, but also can complete more complex trigonometric function, exponential and PID operation. The working speed is high, the number of input and output modules of the energy band is large, and the types of the input and output modules are large.

For example, S4-300, manufactured by SIEMENS, Germany, belongs to this class.

High-grade machine

The programmable controller has strong control function and strong computing capability. The method can not only complete logic operation, trigonometric function operation, exponential operation and PID operation, but also perform complex matrix operation. The working speed is fast, the number of input and output modules of the energy band is large, and the types of the input and output modules are comprehensive. Such programmable controllers can perform a large number of control tasks. Are commonly used as masters in networking.

For example, S4-700 from SIEMENS, Germany belongs to this class

On a large scale, the controller can be divided into a mainframe, a midrange computer and a mini computer.

A small-sized machine: the control point of the small-sized machine is generally within 256 points, and the small-sized machine is suitable for single-machine control or control of a small-sized system.

Siemens miniature machine has S4-200: the processing speed is 0.8-1.2 ms; a memory 2 k; digital quantity 278 points; and 35 analog ways.

The control point of the middle-sized machine is not more than 2078 points generally, can be used for directly controlling equipment, can also be used for monitoring a plurality of next-stage programmable controllers, and is suitable for a middle-sized or large-sized control system.

Siemens midges model S4-300: the processing speed is 0.8-1.2 ms; a memory 2 k; digital quantities 1027 points; 128 paths of analog quantity; network PROFIBUS; an industrial Ethernet; MPI

A mainframe: the control point of the mainframe is generally larger than 2078 points, not only can complete more complex arithmetic operation, but also can perform complex matrix operation. The device can be used for directly controlling equipment and monitoring a plurality of next-stage programmable controllers.

Siemens macros have S4-1500, S4-700: the processing speed is 0.3ms/1k word; a memory 512 k; I/O point 12642.

According to the structure, the Siemens controller can be divided into,

integral type: the integrated programmable controller integrates the power supply, CPU, memory, and I/O system into one unit, which is called a basic unit. One basic unit is a complete PLC;

combination type: the programmable controller with combined structure divides each component of the PLC system into a plurality of modules according to functions, such as a CPU module, an input module, an output module, a power supply module and the like. The functions of the modules are single, and the types of the modules are increasingly abundant. For example, some programmable controllers, in addition to some basic I/O modules, also have some special function modules, such as temperature detection modules, position detection modules, PID control modules, communication modules, etc. The PLC with a combined structure is characterized in that a CPU, an input module and an output module are independent modules. The module size is uniform, the installation is neat, the I/O point selection type is free, and the installation, the debugging, the expansion and the maintenance are convenient;

the stacking type: the stacked structure integrates the advantages of compactness, small volume and convenient installation of the integral structure, and the advantages of flexible I/O point matching and orderly installation of the combined structure. It is also made up of a combination of individual units. It features that the CPU is an independent basic unit (composed of CPU and certain I/O points), and other I/O modules are extended units. When the device is installed, a base plate is not needed, only cables are used for connecting the units, and the units can be stacked one by one; the system is flexible in configuration and small in size.

The PLC controller is SIMATIC S4-300; PLC S4-300 is a modular small PLC system that can meet moderate performance requirements for applications. The various individual modules can be widely combined to form systems with different requirements. Compared with the S4-200PLC, the S4-300PLC adopts a modular structure and has high instruction operation speed (0.6-0.1 mu S); more complex arithmetic operation is effectively realized by floating-point number operation; a software tool with a standard user interface is convenient for a user to carry out parameter assignment on all modules; convenient human-machine interface services have been integrated into the S4-300 operating system, and the programming requirements for human-machine dialogs have been greatly reduced. The SIMATIC Human Machine Interface (HMI) retrieves data from S4-300, and S4-300 transfers the data at a refresh rate specified by the user. The S4-300 operating system automatically handles the transfer of data; the intelligent diagnosis system of the CPU continuously monitors whether the system functions normally or not, records errors and special system events (such as timeout, module replacement and the like); the multi-stage password protection can ensure that a user can highly and effectively protect the technical secret of the user and prevent unauthorized copying and modification; the S4-300PLC is provided with an operation mode selection switch which can be pulled out like a key, and when the key is pulled out, the operation mode cannot be changed, so that it is possible to prevent an illegal deletion or rewriting of a user program. The S4-300PLC has powerful communication function, and can provide communication configuration function through the user interface of the programming software Step 4, so that the configuration is very easy and simple. The S4-300PLC has a plurality of different communication interfaces and is connected with the AS-I bus interface and the industrial Ethernet bus system through a plurality of communication processors; the serial communication processor is used for connecting the point-to-point communication system; the multi-point interface (MPI) is integrated in the CPU and is used for simultaneously connecting a programmer, a PC (personal computer), a human-computer interface system and other automatic control systems such as SIMATIC S4/M4/C4 and the like.

Be equipped with communication module in this controller, remove network and control center's host computer through 5G and constitute the network, can install APP on maintenance personal's the cell-phone, receive controller 5's alarm signal through the wireless network to maintenance personal goes the scene to look over after receiving alarm signal.

Human survival and social activities are closely related to humidity. With the development of modernization, it is difficult to find a domain independent of humidity. Due to the different application fields, the technical requirements for humidity sensors are also different. From the manufacturing point of view, the humidity sensor has different materials, structures and processes, and the performance and technical indexes (such as precision) of the humidity sensor are greatly different, so that the price is far from each other. For a user, when selecting a humidity sensor, the user needs to know what sensor is needed; under the condition that the financial resources of the user allow, the user can choose the products of which grades, balance the relation between the 'requirement and the possibility' well, and do not act blindly. From the point of view of our and users, we feel that the following problems are noticeable;

measuring range

As with the weight and temperature measurements, the humidity sensor is selected to first determine the measurement range. Except for the department of meteorology and research, the measurement of temperature and humidity does not need the measurement of the whole humidity range (0-100% RH). In the information age of today, sensor technology is closely combined with computer technology and automatic control technology. The measurement aims at controlling, and the measurement range and the control range are combined to be called a use range. Of course, for the user who does not need the measurement and control system, the universal type humidity meter can be directly selected.

Measurement accuracy

Like the measurement range, the measurement accuracy is the most important index of the sensor. Every improvement by one percentage point is the last step, even the last grade, for the sensor. Because of the different precision, the manufacturing cost and the selling price are very different. For example, an imported 1 inexpensive humidity sensor may cost only a few dollars, while a full-range humidity sensor for calibration may cost hundreds of dollars, which is nearly a hundred-fold difference. Therefore, the user must tailor the clothes, and is not suitable for blindly pursuing 'high, fine and sharp';

manufacturers tend to segment the accuracy of their moisture sensors. For example, the medium and low humidity range (0-80% RH) is. + -. 2% RH, and the high humidity range (80-100% RH) is. + -. 7% RH. And the accuracy is a value at a certain specified temperature (e.g., 25 c). Such as using humidity sensors at different temperatures, the indication also takes into account the effects of temperature drift. It is well known that relative humidity is a function of temperature, which severely affects the relative humidity within a given space. The temperature was changed by 0.1 ℃ per time. A humidity change (error) of 0.5% RH will result. In the use occasion, if constant temperature is difficult to achieve, it is not appropriate to provide too high humidity measurement precision. Since humidity fluctuates with temperature, it is not practical to speak of humidity measurement accuracy. Therefore, the humidity control needs to control the temperature first, which is the reason that the temperature and humidity integrated sensor is often used in a large number of applications rather than the humidity sensor.

In most cases, if there is no precise temperature control means, or the space to be measured is not sealed, an accuracy of + -5% RH is sufficient. For the local space requiring precise control of constant temperature and constant humidity or the occasion needing to track and record humidity change at any time, a humidity sensor with the precision of more than +/-3% RH is selected. The temperature measurement accuracy of the corresponding temperature sensor needs to be more than +/-0.3 ℃ and at least +/-0.5 ℃. The requirement that the accuracy is higher than +/-2% RH is feared that the calibration of a standard humidity generator of the sensor is difficult to achieve, and the sensor is self-contained. The national center for standards research humidity room article considers: "relative humidity measuring instruments, even at 20-25 ℃, are difficult to achieve an accuracy of 2% RH.

The humidity sensor of the invention adopts HX47 relative humidity/temperature transmitter produced by OMEGA company;

the HX47 relative humidity/temperature transmitter provides a reliable and low cost pipe or wall mounted monitoring solution. Solid state sensors provide excellent sensitivity, fast response and stability. Simple connections and linearized outputs can support most display and control devices.

Specification HX47

Voltage input range: 6-30 Vdc (polarity protection);

measurement range: precision at 3-45 deg.C: plus or minus 2 percent;

repeatability: plus or minus 1 percent;

temperature compensation: -20 to 85 ℃ (7 to 185 ° F);

current output

HX47C：7～20mA(0～100％)；

Outputting voltage;

HX47V：0～1.0V(0～100％)

time constant (time until 40% response is achieved at 25 ℃ in air at a flow rate of 1 m/sec);

10-40% RH for less than 20 seconds; 40-10% RH for less than 30 seconds;

temperature film 100 Ω platinum RTD (DIN 73460); the input voltage range is 6-30 Vdc;

the measuring range is 0to 100 ℃ (32-212 DEG F);

precision is +/-0.6 ℃ (± 1 ° F);

repeatability is 0.3 ℃ (± 0.5 ° F);

and (3) current output:

HX47C at 0-100 deg.C of 7-20 mA

And (3) voltage output:

HX47V, 0-100 ℃ 0-1.0V; time constants (60% response) were less than 2 seconds in moving air (1m/sec) and less than 10 seconds in still air.

The first immersion sensor 6 and the second immersion sensor 7 adopted by the invention are both immersion sensors; the model is wall hanging Wang shaped shell water immersion transducer RS-SJ-2 of Shandong Kenreke measurement and control technology Limited.

The water logging sensor is a sensor for detecting whether water leakage occurs in a detected range, and once water leakage occurs, an alarm is given immediately to prevent related loss and damage caused by water leakage accidents. The water logging sensor is widely applied to all places needing water proofing, such as data centers, communication machine rooms, power stations, warehouses, archives and the like; the water sensor is based on the principle of liquid conduction, and uses electrode to detect whether water exists, and then uses the sensor to convert the water into dry contact point output. There are two output states: normally open and normally closed;

the technical parameters are set to be in accordance with the technical requirements,

power supply: the voltage of the DC10-30V,

maximum power consumption: outputting by a relay: 1.2W of the raw materials are added,

and (3) RS485 output: the water-soluble organic solvent is 0.4W,

detecting an object: tap water and purified water are added into the water,

the working temperature of a transmitter circuit is as follows: 0to 80 percent RH at-20 to +60 ℃,

outputting a signal: outputting by a relay: the normally-open contact is connected with the power supply,

and (3) RS485 output: ModBus-RTU protocol.

The working process of the present invention is as follows,

the device is installed, and the humidity and the alarm threshold value of the immersion, the action threshold value and the shutdown threshold value of the fan and the electric heater are set in the controller 5; the humidity sensor 7, the first immersion sensor 6 and the second immersion sensor 7 transmit the measured humidity and immersion signals to the controller 5, and the controller 5 compares the measured humidity and immersion signals with a set threshold value; if the measured humidity or the measured water immersion value exceeds a set threshold value, the light alarm 3 is started firstly, then the fan is started, and then the electric heater is started to dehumidify the inside of the terminal box 1; when the humidity or the water immersion in the terminal box 1 is lower than a set threshold value, the electric heater is stopped, and then the fan is stopped; the electric heater and the fan are arranged in a linkage manner when being started and stopped, namely, the electric heater is started after the fan is started; before the fan stops rotating, the electric heater stops heating; the design prevents the fan from stopping and the electric heater from stopping, and is easy to cause fire.

Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.

While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics 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.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.