A vehicle-mounted pressure and temperature / humidity integrated sensor

Abstract

This invention relates to the field of automotive electronic sensing technology, and discloses an integrated pressure and temperature / humidity sensor for vehicles. The sensor includes a housing, with multiple fixing bolts installed inside. A vibration-damping mounting assembly is fixedly connected to the outside of the housing, with a mounting bracket fixedly connected to one end of the vibration-damping mounting assembly. A circuit control board is installed inside the housing, along with a fixing assembly and a dividing plate. An air intake assembly is fixedly connected to one side of the dividing plate, with the outside of the air intake assembly installed inside the housing. A temperature / humidity detection module and a pressure detection module are fixedly connected to the other side of the fixing assembly, and the temperature / humidity detection module and the pressure detection module are adjacent to each other. By sequentially setting a threaded guide groove with guiding function, a multi-stage filter structure, and a flow-dividing assembly with a flow-dividing groove in the air intake path, the measurement accuracy and data consistency under multi-parameter synchronous detection conditions are significantly improved.

Description

Technical Field

[0001] This invention relates to the field of automotive electronic sensing technology, specifically to an integrated pressure and temperature / humidity sensor for vehicles. Background Technology

[0002] With the development of automotive electronics technology, the demand for vehicle operating status monitoring and environmental parameter detection is constantly increasing. Various environmental parameters such as pressure, temperature and humidity have been widely used in engine intake systems, on-board environmental monitoring systems and new energy vehicle thermal management systems.

[0003] In existing technologies, automotive pressure and temperature / humidity detection devices typically use an air intake channel on the sensor housing to allow external air to enter the detection area directly or after simple filtration, and then act on the pressure and temperature / humidity detection elements respectively, thereby acquiring environmental parameters. However, during actual vehicle operation, external airflow is usually characterized by large velocity variations, unstable flow patterns, and the presence of water vapor or particulate impurities. Existing air intake structures often only have a single conduction or simple filtration function, making it difficult to effectively guide, divert, and rectify the gas flow path. This results in the airflow entering the detection area being prone to pulsation or turbulent impacts, which in turn affects the stress state of the detection elements and the stability of the measurement environment.

[0004] The existing technology has at least the following technical problems: the existing automotive multi-parameter sensor intake structure has insufficient ability to regulate the gas flow state, making it difficult to form a stable and uniform airflow environment before the gas enters the detection area, which easily leads to fluctuations in the detection signal. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an integrated pressure, temperature, and humidity sensor for vehicles, which solves the problem that existing technologies struggle to create a stable and uniform airflow environment before gas enters the detection area, thus easily leading to fluctuations in the detection signal.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an integrated pressure and temperature / humidity sensor for vehicles, comprising a housing, wherein multiple fixing bolts are installed inside the housing, a vibration isolation mounting assembly is fixedly connected to the outside of the housing, a mounting bracket is fixedly connected to one end of the vibration isolation mounting assembly, a circuit control board is installed inside the housing, a fixing assembly and a dividing plate are installed inside the housing, an air intake assembly is fixedly connected to one side of the dividing plate, the outside of the air intake assembly is installed inside the housing, and a temperature / humidity detection module and a pressure detection module are fixedly connected to the other side of the fixing assembly, wherein the temperature / humidity detection module and the pressure detection module are adjacent to each other.

[0007] Preferably, the air intake assembly includes an air intake shell, one side of which is fixedly connected to the inside of the fixing assembly. The air intake shell has a threaded guide groove inside, and a metal protective mesh layer, a hydrophobic and breathable membrane layer, and a microporous filter layer are sequentially installed inside the air intake shell.

[0008] Preferably, the air intake housing has a circuit sealing cavity fixedly connected inside, the fixed assembly has a pressure plate installed inside, the pressure plate is electrically connected to the pressure detection module, and the air intake housing has a diversion assembly fixedly connected inside.

[0009] Preferably, the diversion component includes an inclined block, the inclined block being externally fixedly connected to the inside of the threaded guide groove, and the inclined block having multiple diversion grooves inside.

[0010] Preferably, a gas guiding component is fixedly connected between the fixing component and the dividing plate. The gas guiding component includes a fixing shell, and a guiding cavity is opened inside the fixing shell. The guiding cavity communicates with the diversion groove.

[0011] Preferably, the fixing component has an air outlet groove inside, and the guide cavity communicates with the air outlet groove.

[0012] Preferably, the vibration isolation mounting assembly includes a connecting shell, the outside of which is fixedly connected to the outside of the outer shell, and a connecting rod is slidably connected inside the connecting shell, with a spring provided between the connecting rod and the connecting shell.

[0013] This invention provides an integrated pressure, temperature, and humidity sensor for vehicles. It offers the following advantages:

[0014] 1. This invention, by sequentially setting a threaded guide groove with guiding function, a multi-stage filter structure, and a flow-dividing component with a flow-dividing groove in the air intake path, and cooperating with the gas guide component and the air outlet groove to form a continuous rectified air channel, allows the external gas to be guided and transported, impurity blocked, moisture isolated, and evenly distributed before entering the pressure detection area and temperature and humidity detection area. This creates a stable and controllable airflow environment, which can effectively reduce the interference caused by airflow pulsation and turbulence impact on the detection element, and significantly improve the measurement accuracy and data consistency under multi-parameter synchronous detection.

[0015] 2. This invention arranges the temperature and humidity detection module and the pressure detection module adjacently, and combines them with the dividing plate and fixing components to form a relatively independent yet interconnected detection space. This allows the same airflow to act on different detection units sequentially under a controlled path, realizing the integrated acquisition of multiple parameters within a single structure. This not only reduces the size of the sensors and the installation space requirements, but also avoids the response differences caused by the dispersed arrangement of multiple sensors, thereby improving the overall coordination and system integration of vehicle environmental condition monitoring.

[0016] 3. This invention establishes an elastic connection between the sensor and the vehicle mounting base by setting a vibration isolation mounting assembly consisting of a connecting shell, a sliding connecting rod, and a spring on the outer side of the outer shell. Under the vibration of vehicle operation, it can achieve step-by-step buffering and energy attenuation of impact load, thereby reducing the impact of vibration on the internal circuit system and the working state of the detection element, and further ensuring that the sensor still has good detection stability and reliability under complex road and working conditions. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a partial structural diagram of the circuit control board of the present invention;

[0019] Figure 3 This is a partial structural diagram of the temperature and humidity detection module of the present invention;

[0020] Figure 4 This is a partial structural diagram of the air intake assembly of the present invention;

[0021] Figure 5 This is a partial structural diagram of the shunt component of the present invention;

[0022] Figure 6 This is a partial structural diagram of the air outlet groove of the present invention;

[0023] Figure 7 This is a partial structural diagram of the vibration isolation mounting assembly of the present invention.

[0024] The components are as follows: 1. Outer shell; 2. Fixing bolt; 3. Vibration isolation mounting assembly; 31. Connecting shell; 32. Connecting rod; 33. Spring; 4. Mounting bracket; 5. Circuit control board; 6. Fixing assembly; 7. Dividing plate; 8. Air intake assembly; 81. Threaded guide groove; 82. Microporous filter layer; 83. Hydrophobic and breathable membrane layer; 84. Metal protective mesh layer; 85. Air intake shell; 9. Temperature and humidity detection module; 10. Pressure detection module; 11. Circuit sealing cavity; 12. Diversion assembly; 121. Inclined block; 122. Diversion groove; 13. Pressure plate; 14. Gas guide assembly; 141. Fixing shell; 142. Guide cavity; 15. Air outlet groove. Detailed Implementation

[0025] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please see the appendix Figure 1 - Appendix Figure 3 This invention provides an integrated pressure and temperature / humidity sensor for vehicles, comprising a housing 1, with multiple fixing bolts 2 installed inside the housing 1, and a vibration isolation mounting assembly 3 fixedly connected to the outside of the housing 1. One end of the vibration isolation mounting assembly 3 is fixedly connected to a mounting bracket 4, a circuit control board 5 is installed inside the housing 1, and a fixing assembly 6 and a dividing plate 7 are installed inside the housing 1. An air intake assembly 8 is fixedly connected to one side of the dividing plate 7, and the outside of the air intake assembly 8 is installed inside the housing 1. A temperature / humidity detection module 9 and a pressure detection module 10 are fixedly connected to the other side of the fixing assembly 6, and the temperature / humidity detection module 9 and the pressure detection module 10 are adjacent to each other.

[0027] Specifically, by fixing the mounting bracket 4 and vibration isolation mounting assembly 3 to the vehicle detection position, the vibration generated by the vehicle operation is absorbed by the elastic buffer structure formed by the connecting shell 31, connecting rod 32 and spring 33, thereby reducing the impact of vibration on the internal circuit control board 5 and the working stability of each detection module of the outer shell 1.

[0028] External gas enters the threaded guide groove 81 through the intake assembly 8 under the action of pressure difference, and then passes sequentially through the metal protective mesh layer 84, the hydrophobic and breathable membrane layer 83, and the microporous filter layer 82, achieving multi-stage filtration of impurities, moisture, and fine particles, keeping the gas entering the device in a stable and clean state. The gas then acts on the pressure plate 13 inside the fixed assembly 6, and the pressure signal is collected by the pressure detection module 10; at the same time, the gas forms a uniform and stable airflow through the diversion assembly 12 and the gas guide assembly 14, and the temperature and humidity of the gas are detected by the temperature and humidity detection module 9 when it flows through the outlet groove 15. All detection signals are finally transmitted to the circuit control board 5 for processing and output, thereby realizing the synchronous monitoring of vehicle environmental pressure, temperature, and humidity.

[0029] Please see the appendix Figure 4 The intake assembly 8 includes an intake shell 85, one side of which is fixedly connected to the inside of the fixing assembly 6. The inside of the intake shell 85 is provided with a threaded guide groove 81. The inside of the intake shell 85 is sequentially installed with a metal protective mesh layer 84, a hydrophobic and breathable membrane layer 83, and a microporous filter layer 82. The inside of the intake shell 85 is fixedly connected with an electrical sealing cavity 11. The inside of the fixing assembly 6 is installed with a pressure plate 13, which is electrically connected to the pressure detection module 10. The inside of the intake shell 85 is fixedly connected with a diversion assembly 12.

[0030] Specifically, the gas to be tested enters the threaded guide groove 81 under the action of pressure difference or airflow. Under the guidance of the threaded structure, an orderly flow path is formed, allowing the gas to gradually enter the detection area. During the entry process, the gas first passes through the metal protective mesh layer 84, which blocks larger particulate impurities and prevents hard particles from entering the internal structure and causing wear or blockage. Then, the gas passes through the hydrophobic and breathable membrane layer 83, which ensures smooth gas passage while isolating liquid water to prevent water vapor from entering and affecting the stability of the circuit and detection elements. After that, the gas passes through the microporous filter layer 82, which further filters fine dust particles, keeping the gas entering the device in a relatively clean state.

[0031] After undergoing multi-stage filtration, the gas continues to flow inside the threaded guide groove 81. Under the action of the flow-dividing component 12, its flow direction is changed, forming a uniformly dispersed airflow. This allows the gas pressure to stably act on the pressure plate 13 installed inside the fixed component 6. The pressure plate 13 undergoes slight elastic deformation under the gas pressure and transmits the deformation signal to the pressure detection module 10 for pressure parameter acquisition. Simultaneously, the circuit sealing cavity 11 isolates and protects the internal circuit area, reducing the impact of external moisture or contaminants on the circuit system, thereby improving overall detection stability and operational reliability.

[0032] Please see the appendix Figure 4 - Appendix Figure 6 The diversion component 12 includes a wedge block 121, which is externally fixedly connected to the inside of the threaded guide groove 81. The wedge block 121 has multiple diversion grooves 122 inside. A gas guide component 14 is fixedly connected between the fixed component 6 and the dividing plate 7. The gas guide component 14 includes a fixed shell 141, which has a guide cavity 142 inside. The guide cavity 142 communicates with the diversion grooves 122. An outlet groove 15 is opened inside the fixed component 6, and the guide cavity 142 communicates with the outlet groove 15.

[0033] Specifically, after entering the threaded guide groove 81, the gas changes its original flow direction under the guidance of the inclined block 121 in the flow splitting assembly 12, allowing the airflow to disperse into multiple flow splitting grooves 122, thereby reducing local airflow impact and making the gas pressure distribution more uniform and stable. The multi-channel flow splitting structure effectively reduces the interference of airflow fluctuations on the detection element, improving the stability of the pressure acquisition process. The split gas then enters the gas guide assembly 14 located between the fixed assembly 6 and the dividing plate 7. The gas is further restricted and rectified in the guide cavity 142 inside the fixed housing 141, creating a channel flow state with strong directionality and stable velocity. Subsequently, the gas enters the outlet groove 15 opened inside the fixed assembly 6 from the guide cavity 142, forming a stable and continuous airflow path as it flows through this area. This is beneficial for the accurate sensing of the subsequent temperature and humidity detection module and avoids fluctuations in detection data caused by airflow turbulence. This improves the overall detection accuracy and response stability of the device and enhances the reliable operation of the sensor in complex vehicle environments.

[0034] Please see the appendix Figure 7 The vibration isolation mounting assembly 3 includes a connecting shell 31, which is fixedly connected to the outside of the outer shell 1. A connecting rod 32 is slidably connected inside the connecting shell 31, and a spring 33 is provided between the connecting rod 32 and the connecting shell 31.

[0035] Specifically, after the sensor is installed at the vehicle detection location, external vibrations are first transmitted to the connecting shell 31 located outside the outer casing 1. The connecting rod 32 inside the connecting shell 31 can undergo axial sliding displacement under force, providing initial buffering of the vibration impact. Simultaneously, the spring 33 installed between the connecting rod 32 and the connecting shell 31 undergoes elastic deformation when compressed or stretched, thereby absorbing and releasing vibration energy, allowing the vibration to gradually decay before being transmitted to the outer casing 1. This improves the device's adaptability to installation in complex working conditions, ensuring the sensor maintains good detection accuracy and reliability.

[0036] Working principle: When this vehicle pressure and temperature and humidity integrated sensor is installed and used, it is fixed to the vehicle to be detected by the mounting bracket 4 and the vibration isolation mounting component 3. The vibration generated during the vehicle operation is elastically buffered and absorbed by the connecting rod 32 and the spring 33 that slide inside the connecting shell 31, thereby reducing the impact of vibration on the stability of the detection structure and circuit components inside the shell 1.

[0037] The external gas to be measured enters the threaded guide groove 81 through the air intake component 8 under the action of pressure difference or flow. During the entry process, it passes through the metal protective mesh layer 84 to block larger particulate impurities, through the hydrophobic and breathable membrane layer 83 to isolate liquid moisture and ensure normal gas permeation, and through the microporous filter layer 82 to further filter fine particles, so that the gas entering the sensor is kept clean and dry.

[0038] The purified gas continues to flow forward inside the threaded guide groove 81, and its flow direction is changed by the inclined block 121 of the diversion component 12. The gas pressure acts on the pressure plate 13 set inside the fixed component 6. When pressed, the pressure plate 13 produces a slight elastic deformation and transmits the corresponding electrical signal to the pressure detection module 10 for pressure parameter acquisition.

[0039] The gas then flows through multiple diversion channels 122 inside the gas guide assembly to form a uniform and stable diversion airflow, making the gas pressure and velocity distribution more balanced. The diverted gas enters the guide cavity 142 inside the fixed shell 141 of the gas guide assembly 14. Under the flow restriction and guidance of the guide cavity 142, a stable directional airflow is formed and further transported to the outlet slot 15 inside the fixed assembly 6. When the gas flows through the outlet slot 15, the measuring head of the temperature and humidity detection module 9 senses the gas temperature and humidity in real time, thereby realizing the synchronous detection of multiple parameters. The signals generated by each detection module are centrally transmitted to the circuit control board 5 for signal conditioning, compensation calculation and data output, realizing the comprehensive monitoring of the vehicle's environmental pressure and temperature and humidity status.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vehicle-mounted pressure and temperature / humidity integrated sensor, comprising a housing (1), characterized in that, Multiple fixing bolts (2) are installed inside the outer shell (1). A vibration isolation mounting assembly (3) is fixedly connected to the outside of the outer shell (1). A mounting bracket (4) is fixedly connected to one end of the vibration isolation mounting assembly (3). A circuit control board (5) is installed inside the outer shell (1). A fixing assembly (6) and a dividing plate (7) are installed inside the outer shell (1). An air intake assembly (8) is fixedly connected to one side of the dividing plate (7). The outside of the air intake assembly (8) is installed inside the outer shell (1). A temperature and humidity detection module (9) and a pressure detection module (10) are fixedly connected to the other side of the fixing assembly (6). The temperature and humidity detection module (9) and the pressure detection module (10) are adjacent to each other. The air intake assembly (8) includes an air intake shell (85), one side of which is fixedly connected to the inside of the fixing assembly (6). The inside of the air intake shell (85) is provided with a threaded guide groove (81). The inside of the air intake shell (85) is sequentially equipped with a metal protective mesh layer (84), a hydrophobic and breathable membrane layer (83), and a microporous filter layer (82). The inside of the air intake shell (85) is fixedly connected with a diversion assembly (12). The diversion component (12) includes a wedge (121), the outside of which is fixedly connected to the inside of the threaded guide groove (81), and the inside of the wedge (121) is provided with multiple diversion grooves (122). A gas guiding component (14) is fixedly connected between the fixed component (6) and the dividing piece (7). The gas guiding component (14) includes a fixed shell (141), and a guiding cavity (142) is opened inside the fixed shell (141). The guiding cavity (142) communicates with the diversion groove (122). The fixed component (6) has an air outlet groove (15) inside, and the guide cavity (142) is connected to the air outlet groove (15).

2. The integrated pressure and temperature / humidity sensor for vehicles according to claim 1, characterized in that, The air intake shell (85) has a circuit sealing cavity (11) fixedly connected inside, and a pressure plate (13) is installed inside the fixing component (6). The pressure plate (13) is electrically connected to the pressure detection module (10).

3. The integrated pressure and temperature / humidity sensor for vehicles according to claim 1, characterized in that, The vibration isolation mounting assembly (3) includes a connecting shell (31), the outside of which is fixedly connected to the outside of the outer shell (1), and a connecting rod (32) is slidably connected inside the connecting shell (31). A spring (33) is provided between the connecting rod (32) and the connecting shell (31).

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