Temperature and humidity combined sensor for environmental monitoring

Abstract

The utility model belongs to the field of environmental monitoring, and particularly discloses a temperature and humidity combined sensor for environmental monitoring, which comprises a shell. The head of the shell is detachably connected with a protective upper shell, a measuring circuit board is arranged in the shell and is encapsulated in the shell through colloid, a socket is arranged at the end, located at the head of the shell, of the measuring circuit board, a temperature and humidity element is inserted into the surface of the socket, and the tail of the shell is detachably connected with a plug. The plug is fixedly connected with the cable in an injection molding manner; one end of the cable is connected with one end of the measuring circuit board at the tail part of the shell in a welding manner; according to the combined sensor provided by the utility model, the measuring power panel is fixed in the shell in a colloid encapsulation manner, the corrosion of the measuring circuit board caused by the use environment can be avoided, the temperature and humidity element is inserted into the socket at the end part of the circuit board, and only the temperature and humidity element needs to be replaced during replacement, so that the cost is reduced. And the structure in the existing sensor is simplified, the use is more convenient, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of environmental monitoring, in particular to a temperature and humidity combined sensor for environmental monitoring. Background Art

[0002] Temperature and humidity sensors are commonly used monitoring devices in meteorological and environmental systems. They can be divided into analog and digital types according to their working mode. The analog type requires the user to design a measurement circuit to detect the voltage analog quantity or current analog quantity and other parameters of the temperature and humidity element, and then output them in the agreed analog form after conversion and calibration. In this process, there are process errors such as measurement, conversion and calibration. The digital type uses a temperature and humidity element with a digital interface that has been calibrated at the factory. After the data is read out by the measurement circuit, it is output in the agreed digital interface mode, avoiding the additional errors associated with measuring analog sensors. Therefore, digital temperature and humidity sensors are increasingly used in various industries.

[0003] The existing temperature and humidity sensors have the problem of being inconvenient to replace at the work site because the temperature and humidity elements are welded. Utility Model Content

[0004] The purpose of the utility model is to provide a temperature and humidity combined sensor for environmental monitoring to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a temperature and humidity combination sensor for environmental monitoring, comprising a shell; the shell head is detachably connected with a protective upper shell, a measuring circuit board is arranged inside the shell, the measuring circuit board is sealed inside the shell by colloid, a socket is arranged at one end of the shell head on the measuring circuit board, a temperature and humidity element is plugged into the surface of the socket, a plug is detachably connected with a plug at the rear of the shell, the plug is fixedly connected to the cable by injection molding, one end of the cable is connected to one end of the measuring circuit board at the rear of the shell by welding, and the plug and the protective upper shell are connected to the shell surface by threads.

[0006] Preferably, an MCU is mounted and fixed on the surface of the measuring circuit board.

[0007] Preferably, the cable and the plug are connected by an injection molding process.

[0008] Preferably, the temperature and humidity element adopts SHT85 temperature and humidity sensor.

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows: the measuring power board in the combined sensor provided by the present invention is fixed in the shell by means of colloid potting, thereby avoiding corrosion of the measuring circuit board by the use environment; the temperature and humidity element is plugged into the socket at the end of the circuit board; when replacement is required, only the temperature and humidity element needs to be replaced, thereby achieving the purpose of easy replacement, and simplifying the structure in the existing sensor, making it easier to use and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 An overall cross-sectional view of a temperature and humidity combination sensor for environmental monitoring provided by the utility model;

[0011] Figure 2 This is an overall three-dimensional structural diagram of a temperature and humidity combination sensor for environmental monitoring provided by the utility model.

[0012] In the figure: 1. Protective upper shell; 2. Shell; 3. Plug; 4. Temperature and humidity element; 5. Measurement circuit board; 6. Cable. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0014] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0015] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0016] See also Figure 1-Figure 2The utility model provides a technical solution: a temperature and humidity combination sensor for environmental monitoring, comprising a shell 2; a protective upper shell 1 is detachably connected to the head of the shell 2, and the protective upper shell 1 is threadedly connected to the head of the shell 2; a measuring circuit board 5 is fixedly installed inside the shell 2, and the measuring circuit board 5 is colloidally encapsulated inside the shell 2; a socket is provided at one end of the head of the shell 2, and the end of the socket leaks out from the head of the shell 2, and a temperature and humidity element 4 is plugged on the surface of the socket; a plug 3 is detachably connected to the rear of the shell 2, and the plug 3 is fixedly connected to the cable 6 by injection molding, and one end of the cable 6 is connected to one end of the measuring circuit board 5 located at the rear of the shell 2 by welding, and the plug 3 and the protective upper shell 1 are both connected to the shell surface by threads.

[0017] The measuring circuit board 5 is surface-mounted with an MCU, which is used to convert and output the values ​​measured by the temperature and humidity element 4;

[0018] The cable 6 and the plug 3 are connected by injection molding, thereby reducing the installation process and solving the sealing problem at the same time;

[0019] The temperature and humidity element 4 adopts the SHT85 temperature and humidity sensor, which has the characteristics of high sensitivity and stable performance;

[0020] like Figure 1-Figure 2 As shown, the utility model is a temperature and humidity combination sensor for environmental monitoring. The combination sensor needs to be used in conjunction with an SDI-12 interface data recorder. When the combination sensor is connected to the SDI-12 interface data recorder and powered on, the SDI-12 interface data recorder sends commands to the combination sensor in accordance with the specified data format and the timing of SDI-12, and the combination sensor parses the commands to perform different actions. When temperature and humidity data are needed, the MCU on the surface of the measurement circuit board 5 in the housing 2 reads the digital indication values ​​of the temperature and humidity of the temperature and humidity element 4 through the digital interface I2C, and then the MCU performs level conversion on the digital indication values ​​of the temperature and humidity according to the timing of SID-12 and outputs them, thereby obtaining the numerical values ​​of the temperature and humidity;

[0021] The operating voltage of this combined sensor is 7V-28V, the average operating current is 0.5mA, the measurement range of humidity is 0%-100% relative humidity, and the accuracy of full-scale relative humidity is within ±2%. The measurement range of temperature is -40℃-70℃, and the accuracy of full-scale temperature is ±0.2℃. The output of this combined sensor is a digital interface, and the cable length can reach 300m, which will not affect data transmission.

[0022] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A temperature and humidity combined sensor for environmental monitoring, characterized in that: The invention comprises a shell (2); the head of the shell (2) is detachably connected to a protective upper shell (1); a measuring circuit board (5) is arranged inside the shell (2); the measuring circuit board (5) is sealed inside the shell (2) by colloid; a socket is arranged at one end of the head of the shell (2); a temperature and humidity element (4) is plugged into the surface of the socket; a plug (3) is detachably connected to the rear of the shell (2); the plug (3) is fixedly connected to a cable (6) by injection molding; one end of the cable (6) is connected to one end of the measuring circuit board (5) located at the rear of the shell (2) by welding; and the plug (3) and the protective upper shell (1) are both connected to the surface of the shell by threads.

2. The temperature and humidity combined sensor for environmental monitoring according to claim 1, characterized in that: The measuring circuit board (5) has an MCU mounted and fixed on its surface.

3. The temperature and humidity combined sensor for environmental monitoring according to claim 1, characterized in that: The cable (6) and the plug (3) are connected by means of an injection molding process.

4. The temperature and humidity combined sensor for environmental monitoring according to claim 1, characterized in that: The temperature and humidity element (4) adopts an SHT85 temperature and humidity sensor.

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