CN220602586U - Portable wireless communication temperature and humidity pressure sensor - Google Patents

Abstract

The utility model discloses a portable wireless communication temperature, humidity and pressure sensor, which is used for measuring temperature, humidity and pressure information in a cavity, and comprises the following components: main control board, probe board, external pressure sensor, advance pressure head, antenna, battery package, back lid, visor, sealing washer and battery compartment, wherein: the main control board is fixed at the rear end of the inner cavity of the pressure inlet head and is connected with the probe board and the external pressure sensor, and the main control board comprises a wireless communication module; the probe plate is fixed at the front end of the inner cavity of the pressure inlet head and is used for measuring temperature, humidity and pressure information in the cavity; the external pressure sensor is encapsulated at the edge of the front end of the pressure inlet head and is used for measuring the atmospheric pressure of the external environment; the structure body is composed of the pressure inlet head, the rear cover, the protective cover, the sealing ring and the battery bin. The components are covered in a plurality of independent covers to overlap and cross, so that miniaturization is realized; the measured data is sent outwards in a wireless mode, and the measurement result is safe and accurate and can be displayed; the double epoxy resin encapsulation process ensures the installation strength of the printed board and the air tightness of the product, and improves the measurement precision.

Description

Portable wireless communication temperature and humidity pressure sensor

Technical Field

The utility model belongs to the technical field of sensors, and particularly relates to a portable wireless communication temperature, humidity and pressure sensor.

Background

In the prior art, a temperature-humidity-pressure sensor is arranged at a proper position of an object to be measured or an object in the nearby environment, such as an outer wall, and is used for measuring information such as temperature, humidity, pressure and the like of gas in a cavity of the object to be measured. However, the current information is still transmitted in a wired mode, and when the transmission unit fails, the information cannot be effectively transmitted; in addition, the measured object is usually placed in a severe environment, and errors easily occur when information in the cavity is transmitted outwards, so that an inaccurate parameter measurement result is caused. The temperature-humidity pressure sensor is usually installed on the outer wall of a measured object, errors exist between measured data and actual data in a cavity, so that accuracy of measurement points is required to be improved, the existing temperature-humidity pressure sensor is huge in size and cannot be placed in the cavity in some cases, interference to environmental data can be caused in the cavity in some cases, measurement accuracy is greatly reduced, and therefore whether the wireless temperature-humidity pressure sensor can be miniaturized or not is ensured, and meanwhile, good sealing effect is ensured and is an important factor for restricting development of the wireless temperature-humidity pressure sensor.

Thus, the above-mentioned prior art does have to propose a better solution.

Disclosure of Invention

The utility model aims to provide a portable wireless communication temperature-humidity-pressure sensor to solve the problems in the prior art, key components are covered in a plurality of independent covers and overlapped and crossed, so that the total volume of the components is greatly reduced; simultaneously, the measured data is transmitted to the outside in a wireless mode, and the measured result can be displayed on a temperature, humidity and pressure detector; the process of encapsulating with double epoxy resins is adopted, so that the mounting strength of the printed board and the overall air tightness of the product are ensured, and the measurement precision is improved.

The first aspect of the utility model provides a portable wireless communication temperature, humidity and pressure sensor for measuring temperature, humidity and pressure information inside a cavity, comprising: main control board (1), probe board (2), external pressure sensor (3), advance pressure head (4), antenna (5), battery package (6), back lid (7), visor (8), sealing washer (9) and battery compartment (10), wherein:

the main control board (1) is connected with the probe board (2) and the external pressure sensor (3) and comprises a wireless communication module for data acquisition and processing and wireless communication control; the main control board (1) is fixed at the rear end of the inner cavity of the pressure inlet head (4);

the probe plate (2) is fixed at the front end of the inner cavity of the pressure inlet head (4) and is used for measuring temperature, humidity and pressure information in the cavity; the probe plate is provided with an internal pressure sensor, and the internal pressure sensor is provided with a static pressure head for measuring the pressure in the cavity;

the external pressure sensor (3) is encapsulated at the edge of the front end of the pressure inlet head (4) and is used for measuring the external environment atmospheric pressure;

the pressure inlet head (4), the rear cover (7), the protective cover (8), the sealing ring (9) and the battery compartment (10) form a structure body of the miniaturized wireless temperature-humidity-pressure sensor;

the probe plate (2) comprises a double epoxy resin structure encapsulating layer; the main control board (1) comprises a double epoxy resin integral encapsulating layer.

Preferably, the pressure inlet head (4) and the protective cover (8) are used for protecting the probe plate (2); the air inlet head (4) is integrally formed by a plurality of hollow cylinders with different inner diameters, air holes are formed in the outer surface of the front end of the air inlet head (4), and the protective cover (8) is arranged at the front end of the air inlet head (4); the inner diameter of the protective cover (8) is connected with the part with the smallest inner diameter in the pressure inlet head (4) through threads or adhesion; the sealing ring (9) is annularly arranged at the joint part of the main control board and the inner wall of the pressure inlet head; the battery bin (10) is used for accommodating the battery pack (6), is clamped at the rear end of the inner cavity of the static pressure head and is fixed through screws; the battery bin (10) is provided with an antenna hole and is provided with a wiring groove for placing the antenna (5); the battery compartment (10), the sealing ring (9) and the rear cover (7) protect the battery pack (6) and the antenna (5); the antenna (5) is arranged at one end of the battery compartment (10); the rear cover (7) is a two-stage stepped cylinder with the inner diameter respectively matched with the largest outer diameter part of the pressure inlet head (4) and the largest outer diameter part of the battery compartment; the rear cover (7) is in threaded connection with the static pressure head through threads.

Preferably, the structural main body of the sensor is made of 316L stainless steel.

Preferably, the battery compartment (10) is a POM battery compartment.

Preferably, the rear cover (7) is a glass fiber reinforced plastic rear cover, and stainless steel threads are embedded in the rear cover.

Preferably, a fluororubber sealing ring is arranged in the rear cover (7).

Preferably, the main control board (1) comprises a singlechip and is used for communicating with each sensitive device; the main control board (1) comprises a memory chip for storing temperature, humidity and pressure information and local configuration parameters in the whole life cycle.

Preferably, the probe plate (2) is a warm-wet-pressing integrated probe, and comprises a thermocouple and a polyaniline salt or acetate polymer film deposited on two conductive electrodes.

Preferably, the battery pack (6) is a lithium-thionyl chloride battery.

Preferably, the antenna (5) is an in-spring antenna.

The temperature-humidity-pressure measuring working principle of the miniaturized wireless temperature-humidity-pressure sensor comprises the following steps:

s1, preparation before measurement, comprising: after the sensor is powered on, routine initialization and self-checking are carried out, a low-power mode is immediately entered, the detection of the CAD leading code is started in a timing wake-up mode, the CAD leading code is switched into a receiving mode after the leading code is detected in a CAD window period, relevant data are received, the MCU is awakened, and a signal acquisition function is called to acquire the current signal intensity; if the signal intensity is not exceeded, the MCU processes related commands;

s2, analyzing and processing digital signals output by an external pressure sensor, an internal pressure sensor and a probe board (2) through a main control board (1), and controlling wireless communication to transmit the analyzed and processed information to a control end or an upper computer; meanwhile, the signal conditioning module is controlled to realize the analog current output of the temperature and humidity pressure parameters; the control end or the upper computer controls the working mode of the temperature-humidity-pressure sensor through a wireless communication interface and modifies the configuration parameters of the temperature-humidity-pressure sensor.

Preferably, the S2 further includes: identifying whether it is local data; if not, discarding the frame data, if so, executing a related command, delaying for a period of time according to the local ID number, and starting CAD channel detection after the delay is reached; if the channel is idle, immediately transmitting data, if the channel is detected to be busy, delaying for a period of time again, starting the CAD again to detect whether the channel is busy, and repeating the above operation until the data transmission is completed.

The sensor provided by the utility model has the following beneficial technical effects:

(1) The portable wireless communication temperature-humidity-pressure sensor is provided to solve the problems in the prior art, key components are covered in a plurality of independent covers and overlapped, so that the total volume of the components is greatly reduced;

(2) Simultaneously, the measured data is transmitted to the outside in a wireless mode, and the measured result can be displayed on a temperature, humidity and pressure detector;

(3) The structural main body is made of 316L stainless steel, and has higher structural strength and corrosion resistance;

(4) The process of encapsulating with the double epoxy resin is adopted in the printed board, so that the mounting strength of the printed board and the air tightness of the whole product are ensured, and the measurement precision is improved;

(5) The battery compartment is made of POM material, so that the structural strength can be ensured, and the structural weight can be reduced;

(6) The rear cover is made of glass fiber reinforced plastic, stainless steel threads are embedded in the rear cover, wave permeability of wireless communication signals can be guaranteed, mounting strength can be guaranteed, and airtight and waterproof performances of the structure can be achieved through cooperation of the sealing ring.

Drawings

FIG. 1 is a schematic diagram of a sensor structure shown in accordance with a preferred embodiment of the present utility model;

FIG. 2 is a schematic diagram illustrating the sensor operating principle according to a preferred embodiment of the present utility model;

FIG. 3 is a schematic diagram of a sensor structure according to a preferred embodiment of the present utility model;

fig. 4 is a schematic diagram of a design scheme of a main control board according to a preferred embodiment of the present utility model;

FIG. 5 is a schematic view of a probe of a wet-temperature integrated structure according to a preferred embodiment of the present utility model;

FIG. 6 is a software workflow diagram of a sensor shown in accordance with a preferred embodiment of the present utility model;

fig. 7 is a schematic structural view showing an embodiment of an electronic device according to the preferred embodiment of the present utility model.

Detailed Description

The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.

Referring to fig. 1, the present embodiment provides a portable wireless communication temperature, humidity and pressure sensor for measuring temperature, humidity and pressure information inside a cavity, including: main control board 1, probe board 2, external pressure sensor 3, advance pressure head 4, antenna 5, battery package 6, back lid 7, visor 8, sealing washer 9 and battery compartment 10, wherein:

the main control board 1 is connected with the probe board 2 and the external pressure sensor 3 and is used for data acquisition and processing and wireless communication control; the main control board 1 is fixed at the rear end of the inner cavity of the pressure inlet head 4;

the probe plate 2 is fixed at the front end of the inner cavity of the pressure inlet head 4 and is used for measuring temperature, humidity and pressure information in the cavity;

the external pressure sensor 3 is encapsulated at the edge of the front end of the pressure inlet head 4 and is used for measuring the external environment atmospheric pressure;

the pressure inlet head 4, the rear cover 7, the protective cover 8, the sealing ring 9 and the battery bin 10 form a structure body of the miniaturized wireless temperature, humidity and pressure sensor, and the pressure inlet head 4 and the protective cover 8 are used for protecting the probe plate 2; in this embodiment, the pressure inlet head 4 is integrally formed by a plurality of hollow cylinders with different inner diameters, the outer surface of the front end of the pressure inlet head 4 is provided with ventilation holes for measuring temperature, humidity and pressure information of the measured environment, and the front end of the pressure inlet head 4 is provided with the protective cover 8 to prevent the sensor from generating excessive materials after being flushed by high-temperature airflow; the inner diameter of the protective cover 8 is screwed with the part of the inlet head 4 with the smallest inner diameter, or alternatively, by bonding or other fastening means as will occur to those of skill in the art; the sealing ring 9 is annularly arranged at the joint part of the main control board and the inner wall of the pressure inlet head; the battery compartment 10 is used for accommodating the battery pack 6, is clamped at the rear end of the inner cavity of the static pressure head, and is fixed through screws; the battery compartment 10 is provided with an antenna hole and a wiring groove for placing the antenna 5; the battery compartment 10, the sealing ring 9 and the rear cover 7 protect the battery pack 6 and the antenna 5, are convenient to detach and are beneficial to replacement of the battery pack 6; the battery pack 6 provides power for the whole sensor; the antenna 5 is arranged at one end of the battery compartment 10 and is used for receiving and transmitting radio signals; the rear cover 7 is a two-stage stepped cylinder with the inner diameter respectively matched with the largest outer diameter part of the pressure inlet head 4 and the largest outer diameter part of the battery compartment; the rear cover 7 is in threaded connection with the static pressure head through threads, and a fluororubber sealing ring is arranged inside the rear cover to ensure the airtight and waterproof performances after the threaded connection.

Working principle:

the pressure and temperature and humidity sensitive elements selected by the sensor output digital signals, so that the environmental information is acquired. And the processor is used for analyzing and processing the digital signals output by the sensitive element and controlling the wireless communication chip to externally perform data transmission. The principle of operation of the sensor is shown in figure 2.

3. Structural and electrical design

Structural design scheme

The sensor structure is designed as shown in figure 3, the maximum size is phi 54mm multiplied by 76mm, and the mechanical interface is M24 multiplied by 1-6g.

The probe plate 2 of the sensor adopts a structure encapsulation process to ensure the reliable fixation of the probe plate 2 and the air tightness of the front end of the sensor; the sensor main control board 1 adopts an integral encapsulation process, so that reliable connection of a circuit board and air tightness inside the sensor are ensured.

The sensor structural design has the following characteristics:

1. the structural main body is made of 316L stainless steel, and has higher structural strength and corrosion resistance;

2. the inside is filled and sealed by the double epoxy resin, so that the mounting strength of the printed board and the air tightness of the whole product are ensured;

3. the battery compartment 10 is made of POM material, so that the structural strength can be ensured, and the structural weight can be reduced;

4. the rear cover 7 is made of glass fiber reinforced plastic, stainless steel threads are embedded in the rear cover, wave permeability of wireless communication signals can be guaranteed, mounting strength can be guaranteed, and airtight and waterproof performances of the structure can be achieved through cooperation of the sealing ring.

(II) Wireless design scheme

1. Frequency point selection

The use frequency is as follows: 470 MHz-56 MHz,614 MHz-787 MHz.

2. Safety measure

Based on the adoption of the Lora technology as a technical means of wireless communication, the following means are adopted to improve the safety of communication:

(1) The chip level development is adopted, so that signal transmission is avoided;

(2) Controlling the transmitting power, and reducing the risk of signal leakage;

(3) Customizing a protocol to avoid plaintext transmission;

(4) And (5) taking encryption measures to carry out identity authentication.

Design scheme of main control board

The design scheme of the main control board is shown in fig. 4. The main board is provided with a singlechip which is used for communicating with each sensitive device, acquiring the measurement results of internal temperature, humidity, pressure and external pressure, communicating with a special wireless communication chip, and controlling the wireless communication module to send the sensor information outwards. A special radio communication chip is designed on the main board for radio communication. The main board is provided with a storage chip for storing temperature, humidity and pressure information and local configuration parameters in the whole life cycle.

The main control chip of the main control board adopts a 32-bit MCU, on-chip resources and interfaces used on the MCU mainly comprise SPI, I2C, USART, RTC, GPIO, ADC, low-power design and the like, and the MCU package adopts QFN32 to effectively reduce the chip volume and the size of the PCB.

In the power control part circuit, the power control of the whole sensor and the power control of the sub-modules are realized by adopting a mode of matching a mos tube, the mos tube adopts a P-channel transistor with low starting voltage and low leakage current to control the switch of the power supply, during the power off period, ids leakage source current can be 1uA, igs grid source current can be 100nA, the starting voltage of 1.5V can ensure that the power supply can be reliably turned on and off under a 3.6V level system so as to ensure the stability and reliability of work. The sensor adopts a low power consumption mechanism to ensure reliable on duty for 3 years.

In the peripheral circuit of the Flash chip, the storage space which can be maximally expanded to 8Mbytes adopts an SPI communication mode to supply power controllably and has a standby mode with low power consumption, so that the design requirement of low power consumption can be met.

In the Lora part circuit, a Lora chip is used for constructing a radio frequency circuit, and typical parameters of the chip relate to: frequency range, highest receive sensitivity, deep sleep current with RTC, TX transmit current, RX receive current, operating temperature, storage temperature, and supply voltage.

By controlling the power supply of the chip to be turned off when the sensor does not need to execute the Lora part function, extremely low power consumption can be ensured to the greatest extent so as to improve the integral standby time of the sensor. The specific Lora part communication distance needs to be finally confirmed by combining the actual situations in the field. In this embodiment, considering that most of the sites known at present are metal frame environments and low power consumption designs of sensors, the communication frequency point and the transmitting power of the Lora are determined to meet the communication distance of 1.5km in open space. If the frequency point conflict and the communication distance are not satisfied in the practical application, the frequency point and the transmitting power can be changed in a software configuration mode, so that the optimal solution of communication is realized, and hardware is not required to be changed.

(IV) Probe card design

The temperature, humidity and pressure integrated probe adopted by the probe plate is shown in fig. 5.

The principle of probe plate temperature measurement is: the thermocouple is composed of two metal wires with different materials, one ends of the two wires are welded together to form a working end, and the working end is arranged at a measured temperature; the other end is called a free end and is connected with the measuring instrument to form a closed loop. When the temperature of the working end is different from that of the free end, thermoelectromotive force can appear in the loop, and the change of the voltage is transmitted to the singlechip through the conversion of the circuit and is converted into a signal which can be identified by the machine.

The principle of probe plate humidity measurement is: the use of a polyamide or acetate polymer film (a polymer compound) deposited on two conductive electrodes changes the dielectric constant between the two electrodes as the film absorbs or loses water. Further, the capacitance of the capacitor is changed, the capacitance change of the capacitor can be captured and converted by an external measuring circuit, and finally the capacitor is displayed as a signal which is easy to identify at an output end.

The temperature and humidity measurement is realized by adopting a high-precision temperature and humidity sensing element, and the requirements are that: the temperature and humidity measuring precision of the element is high, the stability is good, the measuring range is wide, the power consumption is low, the response time is short, and the temperature and humidity directly output I2C digital signals. The sensor is designed to adopt the sensitive element as a design scheme for temperature and humidity measurement. The TH10 is integrated on the probe board and is fully exposed in the measured environment to be fully contacted with the measured environment, so that the temperature and humidity information of the monitored environment can be accurately measured, heat can be fully dissipated, the temperature drift generated by continuous operation of the sensitive element is reduced, and the measurement accuracy is improved. An absolute pressure sensitive core with a rated range of 200kpa is selected as a pressure sensitive element for internal pressure measurement. The core body has low power consumption, and when the power supply voltage is in the range of 1.8V-3.6V, the power consumption is not more than 0.1uA, and an I2C digital signal is output.

(fifth) Battery design

And calculating the total power consumption required by the dormancy and the CAD detection within 3 years based on the average power consumption of the Lora module CAD detection and the dormancy under the condition of waking up the detection at intervals of 2 seconds as A.

Based on the Lora module sending current, sending every frame, byte number and average duration, assuming that 3 times of data needs to be sent every day, the consumed power in 3 years is calculated to be B.

Based on the average current, the length and the average duration of the data received by the Lora module, assuming that the data is received 3 times a day, the power consumed in 3 years is calculated to be C.

Therefore, the Lora module works according to the frequency within 3 years, and the total consumed power consumption is as follows: a+b+c.

According to the method, the MCU and the peripheral circuit wake up operation and send data along with the working frequency of the Lora module, the MCU clock is configured to be average current consumption when the RCH16M normally works in the RUN mode and all peripheral clocks are turned on, a low-power timer +RTC +external 32k crystal oscillator is started in the low-power sleep mode, the current consumption when the other peripheral clocks are all turned off, the peripheral circuit is initially estimated to be all turned off or standby is approximately power-consumed in the sleep period, and the power required to be consumed by the MCU and the peripheral circuit in the low-power sleep period is calculated to be D.

According to the time required by the MCU to acquire sensor data, process related commands and send data in the normal mode, the power consumed within 3 years can be calculated as E assuming that 3 wake-up times per day detect 3 data.

The total system is awoken 3 times a day under the condition that the CAD detection of the Lora module is 2 seconds apart, and the power consumption is required to be as follows when the system works for 3 years under the condition that the data is sent 3 times a day after 4 seconds of each time of waking up the MCU: a+b+c+d+e=tah.

The battery design needs to meet the above requirements above T.

The lithium-thionyl chloride (Li-SOCI 2) battery is selected, the annual self-discharge current is less than 1% due to the special passivation effect, the storage life is more than 10 years, and the technical indexes of the battery relate to: operating temperature, rated capacity, rated voltage, maximum pulse current, size, and battery safety: the product meets UL and IEC standards, meets IEC 60086-4 safety standards and IEC 60079-11 safety standards, and is suitable for explosive gas environments.

Design of antenna

The wireless sensor antenna adopts a built-in antenna, and a matched and customized spring antenna is selected in consideration of the complexity of a wireless signal propagation environment and the limitation of the internal space of the sensor.

The antenna parameters relate to: size, frequency range, gain, impedance, and temperature range.

(seventh) software design scheme

The wireless sensor software adopts embedded software development, is compiled by using a C language, and has the main functions of acquisition of sensor measurement information, wireless communication management, command protocol analysis, information transmission and the like.

Pre-measurement preparation, comprising: after the sensor is powered on, routine initialization and self-checking are carried out, a low-power mode is immediately entered, the detection of the CAD leading code is started in a timing wake-up mode, the CAD leading code is switched into a receiving mode after the leading code is detected in a CAD window period, relevant data are received, the MCU is awakened, and a signal acquisition function is called to acquire the current signal intensity; if the signal intensity is not exceeded, the MCU processes related commands; identifying whether it is local data; if not, discarding the frame data, if so, executing a related command, delaying for a period of time according to the local ID number, and starting CAD channel detection after the delay is reached; if the channel is idle, immediately transmitting data, if the channel is detected to be busy, delaying for a period of time again, starting the CAD again to detect whether the channel is busy, and repeating the above operation until the data transmission is completed. The software workflow of the sensor is shown in fig. 6.

The utility model also provides a memory storing a plurality of instructions for implementing the method according to the first embodiment.

As shown in fig. 7, the present utility model further provides an electronic device, which includes a processor 301 and a memory 302 connected to the processor 301, where the memory 302 stores a plurality of instructions, and the instructions may be loaded and executed by the processor, so that the processor can execute a measurement method corresponding to the sensor according to the embodiment.

While preferred embodiments of the present utility model have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the utility model. It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (10)

1. A portable wireless communication temperature, humidity and pressure sensor for measuring temperature, humidity and pressure information inside a cavity, comprising: main control board (1), probe board (2), external pressure sensor (3), advance pressure head (4), antenna (5), battery package (6), back lid (7), visor (8), sealing washer (9) and battery compartment (10), wherein:

the main control board (1) is connected with the probe board (2) and the external pressure sensor (3) and comprises a wireless communication module for data acquisition and processing and wireless communication control; the main control board (1) is fixed at the rear end of the inner cavity of the pressure inlet head (4);

the probe plate (2) is fixed at the front end of the inner cavity of the pressure inlet head (4) and is used for measuring temperature, humidity and pressure information in the cavity; the probe plate is provided with an internal pressure sensor, and the internal pressure sensor is provided with a static pressure head for measuring the pressure in the cavity;

the external pressure sensor (3) is encapsulated at the edge of the front end of the pressure inlet head (4) and is used for measuring the external environment atmospheric pressure;

the pressure inlet head (4), the rear cover (7), the protective cover (8), the sealing ring (9) and the battery compartment (10) form a structure body of the portable wireless communication temperature-humidity-pressure sensor;

the probe plate (2) comprises a double epoxy resin structure encapsulating layer; the main control board (1) comprises a double epoxy resin integral encapsulating layer.

2. A portable wireless communication temperature-humidity-pressure sensor according to claim 1, characterized in that the inlet head (4) and the protective cover (8) are used for protecting the probe plate (2); the air inlet head (4) is integrally formed by a plurality of hollow cylinders with different inner diameters, air holes are formed in the outer surface of the front end of the air inlet head (4), and the protective cover (8) is arranged at the front end of the air inlet head (4); the inner diameter of the protective cover (8) is connected with the part with the smallest inner diameter in the pressure inlet head (4) through threads or adhesion; the sealing ring (9) is annularly arranged at the joint part of the main control board and the inner wall of the pressure inlet head; the battery bin (10) is used for accommodating the battery pack (6), is clamped at the rear end of the inner cavity of the static pressure head and is fixed through screws; the battery bin (10) is provided with an antenna hole and is provided with a wiring groove for placing the antenna (5); the battery compartment (10), the sealing ring (9) and the rear cover (7) protect the battery pack (6) and the antenna (5); the antenna (5) is arranged at one end of the battery compartment (10); the rear cover (7) is a two-stage stepped cylinder with the inner diameter respectively matched with the largest outer diameter part of the pressure inlet head (4) and the largest outer diameter part of the battery compartment; the rear cover (7) is in threaded connection with the static pressure head through threads.

3. The portable wireless communication temperature, humidity and pressure sensor according to claim 2 wherein the sensor is made of 316L stainless steel.

4. A portable wireless communication temperature-humidity-pressure sensor according to claim 3 wherein the battery compartment (10) is a POM battery compartment.

5. The portable wireless communication temperature-humidity-pressure sensor according to claim 4, wherein the rear cover (7) is a glass fiber reinforced plastic rear cover, and stainless steel threads are embedded in the rear cover.

6. The portable wireless communication temperature-humidity-pressure sensor according to claim 5, wherein a fluororubber sealing ring is arranged inside the rear cover (7).

7. The portable wireless communication temperature-humidity-pressure sensor according to claim 1, wherein the main control board (1) comprises a single chip microcomputer for communication with each sensitive device; the main control board (1) comprises a memory chip for storing temperature, humidity and pressure information and local configuration parameters in the whole life cycle.

8. A portable wireless communication temperature-humidity-pressure sensor according to claim 1 characterized in that the probe plate (2) is a temperature-humidity-pressure integrated probe comprising a thermocouple and a polyamide or acetate polymer film deposited on two conductive electrodes.

9. A portable wireless communication temperature-humidity-pressure sensor according to claim 1 wherein the battery pack (6) is a lithium-thionyl chloride battery.

10. A portable radio communication temperature-humidity-pressure sensor according to claim 1 characterized in that the antenna (5) is an in-spring antenna.