Temperature sensor chain for environmental monitoring

Abstract

The utility model belongs to the field of environmental monitoring, and particularly discloses a temperature sensor chain for environmental monitoring, the sensor chain is composed of at least one sensor single section, the sensor single sections are connected through cables, and each sensor single section comprises a shell; a first support and a second support are symmetrically fixed in the shell, and a measuring circuit board is arranged between the first support and the second support; the measuring circuit board is horizontally arranged between the first support and the second support, the surface of the measuring circuit board is fixedly provided with a temperature element, and the cable extends into the shell of each sensor single section and is fixedly welded with the measuring circuit board; according to the temperature sensor chain, the circuit board and the elements can be prevented from being corroded by the use environment, the requirement of regularly replacing the elements does not need to be considered, the service life of the temperature sensor chain is prolonged, and the purposes of convenience in use and cost reduction are achieved.

Description

Technical Field

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

[0002] Temperature 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 parameters such as the voltage or current of the temperature element, convert and calibrate it, and then output it in the agreed analog form. In this process, there are process errors such as measurement, conversion and calibration. The digital type directly uses a temperature element with a digital interface that has been calibrated at the factory. After the data is read out by the MCU, it is output in accordance with the agreed digital interface method, avoiding the additional errors associated with measuring analog sensors. Therefore, digital temperature sensors are increasingly used in various industries. However, the existing temperature sensors do not take into account the multi-section usage scenario, and there is the inconvenience of needing to be used in multiple sections. In addition, since temperature sensors are often used in humid and corrosive environments, the temperature sensitive elements are damaged prematurely, resulting in large errors in the measurement data. Utility Model Content

[0003] The purpose of the utility model is to provide a temperature sensor chain for environmental monitoring to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a temperature sensor chain for environmental monitoring, the sensor chain is composed of at least one sensor section, and the sensor sections are connected by cables, the sensor sections include a shell; a first bracket and a second bracket are symmetrically fixed inside the shell, and a measuring circuit board is arranged between the first bracket and the second bracket; the measuring circuit board is horizontally arranged between the first bracket and the second bracket, a temperature element is mounted and fixed on the surface of the measuring circuit board, and the cable extends into the shell of each sensor section and is welded and fixed to the measuring circuit board.

[0005] Preferably, an MCU is mounted and fixed on the surface of the measuring circuit board.

[0006] Preferably, the first bracket, the second bracket and the measuring circuit board located between the first bracket and the second bracket are fixed inside the housing by an injection molding process.

[0007] Preferably, both ends of the cable are respectively configured as an introduction end and a lead-out end, and the introduction end is welded and fixed to the measurement circuit board in the headmost sensor section, and the lead-out end is welded and fixed to the measurement circuit board in the last sensor section.

[0008] Preferably, the temperature element is a TMP117 temperature sensor.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] 1. The first bracket, the second bracket and the measuring circuit board on the surface of the first bracket and the second bracket of the utility model located inside the shell are sealed in the shell through an injection molding process, thereby avoiding corrosion of the circuit board and components by the use environment, and thus there is no need to consider the need for regular replacement of components, which not only improves the service life of the temperature sensor chain, but also achieves the purpose of convenient use and cost reduction.

[0011] 2. Compared with the existing analog temperature sensor, the temperature sensor of the utility model is internally compensated to avoid the measurement error caused by the drift of the component parameters of the analog sensor with the change of temperature and environment. The data output of the existing digital temperature sensor is mostly 485 or 232 interface, which requires more wiring harnesses, while the temperature sensor adopts SDI-12 interface, and the data interface uses fewer wiring harnesses, so data transmission can be carried out. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is an overall three-dimensional structural diagram of a temperature sensor chain for environmental monitoring provided by the utility model;

[0013] Figure 2 This is a cross-sectional view of a temperature sensor chain for environmental monitoring provided by the utility model.

[0014] In the figure: 1. lead-in end; 2. housing; 3. first bracket; 4. cable; 5. temperature element; 6. measuring circuit board; 7. second bracket; 8. lead-out end. DETAILED DESCRIPTION

[0015] 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.

[0016] 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.

[0017] 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.

[0018] See also Figure 1-Figure 2 The utility model provides a technical solution: a temperature sensor chain for environmental monitoring, the sensor chain is composed of at least one sensor section. If the sensor chain is composed of more than two sensor sections, the sensor sections are connected by cables 4, and the sensor sections include a shell 2; a first bracket 3 and a second bracket 7 are symmetrically fixed inside the shell 2, and a measuring circuit board 6 is arranged between the first bracket 3 and the second bracket 7; the measuring circuit board 6 is horizontally arranged between the first bracket 3 and the second bracket 7, and a temperature element 5 is fixedly mounted on the surface of the measuring circuit board 6, and the cable 4 extends into the shell 2 of each sensor section and is welded and fixed to the measuring circuit board 6;

[0019] The two ends of the cable 4 are respectively arranged as an introduction end 1 and an extraction end 8, and the introduction end 1 is welded and fixed to the measuring circuit board 6 in the headmost sensor section, and the extraction end 8 is welded and fixed to the measuring circuit board 6 in the last sensor section.

[0020] The measuring circuit board 6 has an MCU mounted on its surface, and the MCU is used to convert and output the value measured by the temperature element 5;

[0021] The first bracket 3, the second bracket 7 and the measuring circuit board 6 located between the first bracket 3 and the second bracket 7 are fixed inside the housing 2 by an injection molding process. The injection molding process can reduce the installation process and solve the sealing problem at the same time;

[0022] The temperature element 5 adopts a temperature sensor of model TMP117;

[0023] like Figure 1-Figure 2As shown, a temperature sensor chain for environmental monitoring of the utility model needs to be used in conjunction with an SDI-12 interface data recorder. Each measurement node of the sensor chain has its own address. When the sensor chain is connected to the SDI-12 interface data recorder and powered on, the SDI-12 interface data recorder sends commands to the sensor chain according to the specified data format and SDI-12 timing. Each sensor node of the sensor chain parses the command to perform different actions. When temperature data is needed, the MCU on the surface of the measurement circuit board 6 reads the temperature digital representation value of the temperature element 5 through the digital interface I2C, and then the MCU performs level conversion on the temperature digital representation value according to the SDI-12 timing and outputs it.

[0024] The operating voltage of the temperature sensor chain is 7V-28V, the average operating current of each section of the temperature sensor chain is 0.5mA, the temperature measurement range is -40℃-100℃, the accuracy of the full-scale temperature is ±0.2℃, the output of the temperature sensor chain is a digital interface, and the cable length can reach 300m, which will not affect data transmission.

[0025] 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".

[0026] 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 sensor chain for environmental monitoring, characterized in that: The sensor chain is composed of at least one sensor section, and a plurality of sensor sections are connected by cables (4), wherein the sensor section comprises a shell (2); a first bracket (3) and a second bracket (7) are symmetrically fixed inside the shell (2), and a measuring circuit board (6) is arranged between the first bracket (3) and the second bracket (7); the measuring circuit board (6) is horizontally arranged between the first bracket (3) and the second bracket (7), a temperature element (5) is fixedly mounted on the surface of the measuring circuit board (6), and the cable (4) extends into the shell (2) of each sensor section and is welded and fixed to the measuring circuit board (6).

2. A temperature sensor chain for environmental monitoring according to claim 1, characterized in that: The surface of the measuring circuit board (6) is provided with an MCU.

3. The temperature sensor chain for environmental monitoring according to claim 1, characterized in that: The first bracket (3), the second bracket (7) and the measuring circuit board (6) located between the first bracket (3) and the second bracket (7) are fixed inside the housing (2) by means of an injection molding process.

4. The temperature sensor chain for environmental monitoring according to claim 1, characterized in that: The two ends of the cable (4) are respectively arranged as an introduction end (1) and an outlet end (8), and the introduction end (1) is welded and fixed to a measuring circuit board (6) in a headmost sensor section, and the outlet end (8) is welded and fixed to a measuring circuit board (6) in a last sensor section.

5. The temperature sensor chain for environmental monitoring according to claim 1, characterized in that: The temperature element (5) adopts a temperature sensor of the TMP117 model.

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