Wireless temperature and humidity sensor

Abstract

The utility model discloses a wireless temperature and humidity sensor, which belongs to the related technical field of wireless sensors and comprises a shell, a temperature and humidity probe extending out of the shell, a battery component and a master control component which are positioned in the shell, and an antenna and an electric connector which are fixed on the shell, the shell comprises an upper cover and a base which are connected through a screw in a penetrating mode, the temperature and humidity probe is connected with the main control assembly, the main control assembly comprises a low-power-consumption MCU, an LORA module and a battery power supply management module, temperature and humidity can be converted into corresponding electric signals, the temperature and humidity signals are sent to a remote host through wireless communication to be displayed, and the remote host is connected with the main control assembly. The device has the advantages of being small in size, easy to use, low in cost, good in shock resistance, high in stability and the like, and can adapt to limited space and strict weight limitation in the rocket fairing.

Description

Technical Field

[0001] The utility model relates to the technical field of wireless sensors, in particular to a wireless temperature and humidity sensor. Background Art

[0002] Inside the fairing of a launch vehicle, to ensure that the satellite to be launched is in a suitable temperature and humidity environment, accurate measurement of temperature and humidity is crucial. However, this special environment poses extremely high requirements on sensors, such as anti-vibration performance, stability, low power consumption, and reliable wireless communication. The temperature and humidity sensors in the prior art have deficiencies in anti-vibration performance and stability, and cannot meet the application requirements in such extreme and complex environments. Summary of the Utility Model

[0003] The utility model provides a wireless temperature and humidity sensor, which can convert temperature and humidity into corresponding electrical signals, and send the temperature and humidity signals to a remote host for display through wireless communication. It has the characteristics of small size, simple use, low cost, good anti-vibration performance and high stability, and can adapt to the limited space and strict weight limit inside the rocket fairing.

[0004] The specific technical solution provided by the utility model is as follows:

[0005] A wireless temperature and humidity sensor provided by the utility model includes a housing, a temperature and humidity probe extending outside the housing, a battery assembly and a main control assembly located inside the housing, an antenna and an electrical connector fixed on the housing. Among them, the housing includes an upper cover and a base connected by screws passing through, the temperature and humidity probe is connected to the main control assembly, and the main control assembly includes a low-power MCU, a LORA module and a battery power supply management module.

[0006] Optionally, the temperature and humidity probe is connected to the low-power MCU through serial communication, the low-power MCU is in serial communication with the LORA module, and the low-power MCU is in single-bus communication with the battery power supply management module.

[0007] Optionally, the battery assembly is composed of a low-temperature-resistant battery, an external protective shell and an end protective cover, and the low-temperature-resistant battery is sealed inside the external protective shell by potting.

[0008] Optionally, the antenna, the temperature and humidity probe and the electrical connector are fixed in the openings on the side of the base. After the antenna is fixed in the opening on the side of the base with screws, it is sealed with thread glue.

[0009] Optionally, the temperature and humidity probe is fixed in the threaded hole on the side of the base with a PP cotton filter element and thread glue, and a rubber gasket is provided between the electrical connector and the base.

[0010] Optionally, the interior of the housing is sealed with potting compound.

[0011] The utility model has the following beneficial technical effects:

[0012] An embodiment of the utility model provides a wireless temperature and humidity sensor, which includes a housing, a temperature and humidity probe extending outside the housing, a battery assembly and a main control assembly located inside the housing, an antenna and an electrical connector fixed on the housing. Wherein, the housing includes an upper cover and a base connected by screws in a penetrating manner. The temperature and humidity probe is connected to the main control assembly. The main control assembly includes a low-power MCU, a LORA module and a battery power supply management module, which can convert temperature and humidity into corresponding electrical signals and send the temperature and humidity signals to a remote host for display through wireless communication. It has the characteristics of small size, simple use, low cost, good earthquake resistance and high stability, and can adapt to the limited space and strict weight limit inside the rocket fairing. Description of the Drawings

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0014] Figure 1 It is a front view structural schematic diagram of a wireless temperature and humidity sensor according to an embodiment of the present utility model;

[0015] Figure 2 It is a side view structural schematic diagram of a wireless temperature and humidity sensor according to an embodiment of the present utility model;

[0016] Figure 3 It is a circuit schematic diagram of a main control assembly according to an embodiment of the present utility model. Detailed Embodiments

[0017] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the following will further describe the present utility model in detail with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present utility model.

[0018] The following will combine Figures 1 - 3 to describe in detail a wireless temperature and humidity sensor according to an embodiment of the present utility model.

[0019] Refer toFigure 1 , Figure 2 and Figure 3 As shown in Figure 1 , Figure 2 and Figure 3 , a wireless temperature and humidity sensor provided by an embodiment of the present utility model includes a housing 1, a temperature and humidity probe 2 extending outside the housing 1, a battery assembly 3 and a main control assembly 4 located inside the housing 1, an antenna 5 and an electrical connector 6 fixed on the housing 1. Among them, the housing 1 includes an upper cover 101 and a base 102 connected by screws passing through. After the upper cover 101 and the base 102 are installed, the inside is sealed by potting. The entire inside of the housing 1 is potted, which can not only protect the wire bonding and solder joints, but also effectively reduce the damage to the internal circuit caused by vibration.

[0020] Refer to Figure 1 , Figure 2 and Figure 3 As shown in ,

[0020] and Figure 1 , the battery assembly 3 is composed of a low-temperature-resistant battery, an external protective shell and an end face protective cover. The low-temperature-resistant battery is potted and sealed inside the external protective shell. Wires are welded to both ends of the battery, and then potted and sealed inside the external protective shell (one-time potting). Both the external protective shell and the end face protective cover are made of PEEK material, which can effectively protect the internal battery and has a certain buffering effect at the same time. Then the battery assembly is potted and sealed in the battery compartment of the housing (secondary potting) to further protect the battery and buffer the battery. The PEEK protective shell and the two-time potting can effectively absorb the impact of the base and the upper cover on the battery during the vibration of the sensor, effectively reduce the vibration of the battery, and thus avoid the danger of the battery. At the same time, potting can further isolate the battery from air. Even if the battery leaks, it can effectively avoid the problem of spontaneous combustion when contacting air.

[0021] Refer to Figure 1 , Figure 2 and Figure 3 As shown in ,

[0021] and Figure 1 , the antenna 5, the temperature and humidity probe 2 and the electrical connector 6 are fixed in the openings on the side of the base. The antenna 5 is fixed in the opening on the side of the base by screws and then sealed with thread sealant. The temperature and humidity probe 2 is fixed in the threaded hole on the side of the base with a PP cotton filter element and thread sealant. A rubber gasket is provided between the electrical connector 6 and the base.

[0022] The openings on the side of the sensor base are respectively used to fix the antenna 5, the temperature and humidity probe 2 and the electrical connector 6. First, the antenna is screwed onto the base (primary fixation), and then the antenna is fixed to the base again with a nut (secondary fixation). Thread sealant is applied to the thread to enhance the thread strength and prevent thread loosening. The antenna adopts a structurally designed with perfect functions, light weight and short length to reduce the vibration of the antenna during vibration. Since the antenna in this installation method is equivalent to a cantilever beam, the vibration of the antenna will be more intense when the sensor vibrates. Therefore, reducing the length and weight can effectively reduce the vibration of the antenna to ensure the structural stability.

[0023] During the fixing process of the temperature and humidity probe 2, first place the hollow PP cotton filter element into the fixing part (made of PEEK material) for fixing the temperature and humidity probe, and place the temperature and humidity probe sensor into the hollow part of the PP cotton filter element and fix it with glue. Screw the fixing part onto the base (primary fixation) through threads, and then use a nut to fix the temperature and humidity probe fixing part onto the base again (secondary fixation). Thread glue is coated on the threads to enhance the thread strength and prevent thread loosening. Since the temperature and humidity probe is close to the antenna, the fixing part is made of PEEK (polyether ether ketone) material. This material has excellent properties such as high temperature resistance, easy processing, corrosion resistance, anti-aging, high temperature resistance, hydrolysis resistance, and high mechanical strength. Therefore, using this material can effectively ensure the durability of the fixing part. The PP cotton filter element is the main component of the water purifier. This material can effectively ensure that water vapor in the air freely passes through the filter element, enabling the sensor to more accurately measure the humidity in the air. At the same time, this material can also effectively isolate impurities in the environment, effectively protect the function of the internal temperature and humidity probe, and greatly reduce the possibility of damage.

[0024] A rubber gasket is provided between the electrical connector 6 and the base, which can play an effective sealing role. Fix the electrical connector to the base with 4 screws. The electrical connector 6 plays a role in controlling the on / off of the battery. When the plug of the electrical connector is not inserted, the wireless temperature and humidity sensor of the embodiment of the present utility model is in a disconnected state, the battery does not supply power, and the wireless temperature and humidity sensor does not work, so that the wireless temperature and humidity sensor can be stored for a long time; when the plug of the electrical connector is inserted, the wireless temperature and humidity sensor is in a connected state, the battery supplies power, and the wireless temperature and humidity sensor works. At the same time, during use, when the plug of the electrical connector is inserted, it can also effectively prevent water vapor in the environment from entering the electrical connector and affecting the use and measurement.

[0025] Reference Figure 1 、 Figure 2 and Figure 3 As shown in

[0026] The circuit works as follows. When the electrical connector plug is inserted, the battery output is connected to the sensor power supply. The battery power is converted into +3V through the DCDC chip to supply power to the low-power MCU, LORA module, and temperature and humidity probe 2. After the low-power MCU and LORA module are powered on, they enter the sleep mode. When the LORA gateway wakes up the LORA module through wireless communication, the LORA module enters the working mode and issues an instruction to wake up the low-power MCU at the same time. The wireless temperature and humidity sensor enters the working mode. According to the preset time interval, it collects the temperature and humidity data of the temperature and humidity sensor and the battery power data and transmits them to the low-power MCU through the single bus. The low-power MCU then uploads the data to the gateway system through the serial port via the LORA module and displays it on the main control platform.

[0027] An embodiment of the present invention provides a wireless temperature and humidity sensor, which includes a housing, a temperature and humidity probe extending outside the housing, a battery assembly and a main control assembly located inside the housing, an antenna and an electrical connector fixed on the housing. Among them, the housing includes an upper cover and a base connected by screws passing through. The temperature and humidity probe is connected to the main control assembly. The main control assembly includes a low-power MCU, a LORA module and a battery power supply management module, which can convert temperature and humidity into corresponding electrical signals and send the temperature and humidity signals to a remote host for display through wireless communication. It has the characteristics of small size, simple use, low cost, good earthquake resistance and high stability, and can adapt to the limited space and strict weight limit inside the rocket fairing. Using LORA wireless communication technology, it can achieve stable and reliable data transmission in a complex electromagnetic environment. Through optimized circuit and structure design, it ensures the efficient integration and reliable operation of the wireless temperature and humidity sensor in a narrow space.

[0028] Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, if these modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims

1. A wireless temperature and humidity sensor, characterized in that: The wireless temperature and humidity sensor includes a shell, a temperature and humidity probe extending outside the shell, a battery assembly and a main control assembly located inside the shell, an antenna and an electrical connector fixed to the shell, wherein the shell includes an upper cover and a base connected by screws, the temperature and humidity probe is connected to the main control assembly, and the main control assembly includes a low-power MCU, a LORA module and a battery power management module.

2. The wireless temperature and humidity sensor according to claim 1, characterized in that: The temperature and humidity probe is connected to the low-power MCU by serial communication, the low-power MCU is connected to the LORA module by serial communication, and the low-power MCU is connected to the battery-powered management module by single bus communication.

3. The wireless temperature and humidity sensor according to claim 1, characterized in that: The battery assembly is composed of a low-temperature resistant battery, an external protective shell and an end face protective cover, and the low-temperature resistant battery is sealed inside the external protective shell by glue injection.

4. The wireless temperature and humidity sensor according to claim 1, characterized in that: The antenna, the temperature and humidity probe and the electrical connector are fixed in the opening on the side of the base. The antenna is fixed in the opening on the side of the base by screws and then sealed by thread glue.

5. The wireless temperature and humidity sensor according to claim 4, characterized in that: The temperature and humidity probe is fixed in the threaded hole on the side of the base by using a PP cotton filter element and thread glue, and a rubber sealing pad is arranged between the electrical connector and the base.

6. The wireless temperature and humidity sensor according to claim 4, characterized in that: The interior of the shell is sealed by glue injection.

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