Sensing mechanism and vehicle

Abstract

The invention belongs to the technical field of sensors, and particularly relates to a sensing mechanism and a vehicle. The sensing mechanism comprises a housing, a detection head, a sealing ring, a circuit board and a humidity sensing chip mounted on the circuit board; the detection head is provided with an accommodating hole and an induction hole communicated with the accommodating hole, and the housing is provided with an internal space; the detection head is mounted on the housing, and the internal space is communicated with the accommodating hole; the circuit board is mounted in the internal space and the accommodating hole; the humidity sensing chip is positioned in the accommodating hole and is opposite to the sensing hole; the sealing ring is sleeved on the housing; and the sealing ring is used for sealing the connecting part of the housing and the external part at the through hole when the detection head penetrates through the through hole and is inserted into the to-be-detected space of the external part to detect the humidity signal. According to the sensing mechanism, dust, water and the like in the external environment are prevented from entering the air inlet side of the engine through the sealing ring, so that the sensing mechanism can be applied to the working environment of the engine, and the detection precision and the service life of the sensing mechanism are guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of sensors, and in particular relates to a sensing mechanism and a vehicle. Background Art

[0002] To improve engine fuel economy, EGR (Exhaust Gas Recirculation) technology is widely used. However, the introduction of EGR can cause condensation in the engine. This condensation is carried into the combustion chamber along with the intake air. Under extreme operating conditions, condensation in the combustion chamber can disrupt engine combustion stability and even cause misfire. To reduce condensation from the intake side into the engine combustion chamber, a humidity sensor is used to monitor the air humidity on the engine intake side.

[0003] Existing humidity sensors are mostly used in passenger compartments or air conditioning ducts, which offer relatively benign environments free from harsh operating conditions like high temperatures, dust, water immersion, and vibration. Consequently, these existing humidity sensors suffer from poor structure and performance. Engines, on the other hand, often operate in harsh environments like high temperatures, vibration, and dust. Therefore, existing humidity sensors are susceptible to damage or suffer from low measurement accuracy when used in these harsh engine operating environments. Summary of the Invention

[0004] The present invention addresses the technical problems in the prior art that humidity sensors may be easily damaged or have low measurement accuracy when used in an engine working environment, and proposes a sensing mechanism and a vehicle.

[0005] To solve the above problems, an embodiment of the present invention provides a sensing mechanism, comprising a housing, a detection head, a sealing ring, a circuit board, and a humidity sensing chip mounted on the circuit board; the detection head is provided with a receiving hole and a sensing hole connected to the receiving hole, and the housing is provided with an internal space;

[0006] The detection head is mounted on the housing, and the internal space is connected to the receiving hole; the circuit board is mounted in the internal space and the receiving hole, and the humidity sensing chip is located in the receiving hole and arranged opposite to the sensing hole;

[0007] The sealing ring is sleeved on the cover; the sealing ring is used to seal the connection between the cover and the external component at the through hole position when the detection head is inserted into the detected space of the external component through the through hole to detect the humidity signal.

[0008] Optionally, the cover comprises a plug-in cylinder, a limit plate and a shell connected in sequence, the internal space is provided on the plug-in cylinder, the limit plate and the shell, the detection head is mounted on an end of the plug-in cylinder away from the limit plate, and the sealing ring is sleeved on the plug-in cylinder;

[0009] When the detection head extends into the space to be tested, the plug-in tube is inserted into the through hole, and the opposite end faces of the sealing ring respectively abut against the limit plate and the end of the outer component away from the space to be tested, and the sealing ring is used to seal the through hole.

[0010] Optionally, a limiting protrusion is provided on the outer wall of the plug-in cylinder, and the limiting protrusion is used to engage with a limiting groove provided on the inner side wall of the through hole.

[0011] Optionally, the limiting plate is provided with a positioning protrusion protruding toward the detection head, and the positioning protrusion is used to be plugged into a positioning hole provided on the external component.

[0012] Optionally, the cover further comprises a docking sleeve connected to the shell, and the docking sleeve is provided with a docking hole communicating with the internal space;

[0013] The sensing mechanism further includes a guide pin installed in the docking hole, wherein one end of the guide pin away from the docking cylinder extends into the internal space and is electrically connected to the circuit board.

[0014] Optionally, the sensing mechanism further includes a cover plate, and the cover shell is further provided with an installation opening communicating with the internal space; the cover plate is connected to the cover shell and is used to cover the installation opening.

[0015] Optionally, the sensing mechanism further includes a temperature sensing chip mounted on the circuit board.

[0016] Optionally, the sensing mechanism further includes a conditioning chip mounted on the circuit board and located in the internal space, wherein the conditioning chip is used to amplify the humidity signal detected by the humidity sensing chip.

[0017] Optionally, the sensing mechanism further includes a protective cover sleeved on the detection head.

[0018] Another embodiment of the present invention further provides a vehicle, comprising the above-mentioned sensing mechanism, wherein the sensing mechanism is installed in an engine compartment, and the humidity sensing chip is used to detect the air humidity on the air intake side of the engine.

[0019] In the present invention, a receiving hole and a sensing hole connected to the receiving hole are provided on the detection head, and an internal space is provided on the cover shell; the detection head is installed on the cover shell, the internal space is connected to the receiving hole, the circuit board is installed in the internal space and the receiving hole, and the humidity sensing chip is located in the receiving hole and arranged opposite to the sensing hole; when the cover shell is inserted into the through hole of the external component, the detection head extends into the space to be measured of the external component, so that the humidity sensing chip located in the detection head can detect the humidity in the space to be measured, and the sealing ring abuts against the edge of the through hole opening, and the sealing ring can also abut against the inner wall of the through hole, so that the sealing ring can play a role in sealing the connection between the cover shell and the external component, avoiding the accident of gas in the space to be measured leaking through the through hole, and avoiding dust in the external environment from entering the space to be measured through the through hole.

[0020] When the cover is installed in the engine compartment, the detection head can be extended into the air intake side of the engine, so that the humidity sensing chip can detect the humidity on the air intake side of the engine. The sealing ring is used to seal the through hole on the air intake side of the engine. The sealing ring prevents dust, moisture, etc. in the external environment from entering the air intake side of the engine, so that the sensing mechanism can be used in the working environment of the engine, and the detection accuracy and service life of the sensing mechanism are guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings and examples.

[0022] Figure 1 A schematic diagram of the explosion structure of a sensing mechanism provided in one embodiment of the present invention.

[0023] The reference numerals in the specification are as follows:

[0024] 1. Cover; 11. Connecting sleeve; 111. Limiting protrusion; 12. Limiting plate; 121. Positioning protrusion; 13. Shell; 14. Docking sleeve; 141. Docking hole; 2. Detection head; 21. Receiving hole; 22. Sensing hole; 3. Sealing ring; 4. Circuit board; 5. Humidity sensing chip; 6. Guide pin; 7. Cover plate; 8. Conditioning chip. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] It should be understood that the directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "back", and "middle" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation of the present invention.

[0027] like Figure 1 As shown, a sensing mechanism provided by the first embodiment of the present invention includes a cover 1, a detection head 2, a sealing ring 3, a circuit board 4 and a humidity sensing chip 5 installed on the circuit board 4; the detection head 2 is provided with a receiving hole 21 and a sensing hole 22 connected to the receiving hole 21, and the cover 1 is provided with an internal space; the detection head 2 is installed on the cover 1, and the internal space is connected to the receiving hole 21; the circuit board 4 is installed in the internal space and the receiving hole 21, and the humidity sensing chip 5 is located in the receiving hole 21 and is arranged opposite to the sensing hole 22; it can be understood that the humidity sensing chip 5 is located directly below the sensing hole 22, and the air can contact the humidity sensing chip 5 through the sensing hole 22, so that the humidity sensing chip 5 can detect the humidity in the external environment.

[0028] The sealing ring 3 is sleeved on the cover 1; the sealing ring 3 is used to seal the connection between the cover 1 and the external component at the through hole position when the detection head 2 is inserted into the test space of the external component through the through hole to detect the humidity signal.

[0029] In the present invention, the detection head 2 is provided with a accommodating hole 21 and a sensing hole 22 connected to the accommodating hole 21, and the cover 1 is provided with an internal space; the detection head 2 is installed on the cover 1, the internal space is connected to the accommodating hole 21, the circuit board 4 is installed in the internal space and the accommodating hole 21, and the humidity sensing chip 5 is located in the accommodating hole 21 and is arranged opposite to the sensing hole 22; when the cover 1 is inserted into the through hole of the external component, the detection head 2 extends into the space to be measured of the external component, so that the humidity sensing chip 5 located in the detection head 2 can detect the humidity in the space to be measured, the sealing ring 3 abuts against the edge of the through hole opening, and the sealing ring 3 can also abut against the inner wall of the through hole, so that the sealing ring 3 can play the role of sealing the connection between the cover 1 and the external component, avoiding the accident of gas in the space to be measured leaking through the through hole, and avoiding dust in the external environment from entering the space to be measured through the through hole.

[0030] When the cover 1 is installed in the engine compartment, the detection head 2 can be extended into the air intake side of the engine, so that the humidity sensing chip 5 can detect the humidity on the air intake side of the engine. The sealing ring 3 is used to seal the through hole on the air intake side of the engine. The sealing ring 3 prevents dust, moisture, etc. in the external environment from entering the air intake side of the engine, so that the sensing mechanism can be used in the working environment of the engine and ensures the detection accuracy and service life of the sensing mechanism.

[0031] In one embodiment, if Figure 1 As shown, the cover shell 1 includes a plug-in cylinder 11, a limit plate 12 and a shell 13 connected in sequence, the internal space is arranged on the plug-in cylinder 11, the limit plate 12 and the shell 13, the detection head 2 is installed on the end of the plug-in cylinder 11 away from the limit plate 12, and the sealing ring 3 is sleeved on the plug-in cylinder 11; it can be understood that the plug-in cylinder 11, the limit plate 12 and the shell 13 are an integrally formed part; in a specific embodiment, the plug-in cylinder 11 is a cylinder, the limit plate 12 is a disc, the shell 13 is a square shell, and the cylinder is coaxially arranged with the disc, and the outer diameter of the cylinder is smaller than the outer diameter of the disc.

[0032] When the detection head 2 is extended into the space to be measured, the plug-in tube 11 is inserted into the through hole, and the opposite end faces of the sealing ring 3 respectively abut against the limit plate 12 and the end of the outer component away from the space to be measured, and the sealing ring 3 is used to seal the through hole.

[0033] Specifically, the plug-in barrel 11 can be inserted into the through-hole of the outer component via a threaded structure, the detection head 2 extends into the space to be measured of the outer component, the housing 13 is located in the external environment of the outer component, and the sealing ring 3 is pressed between the limiting plate 12 and the outer component (that is, the sealing ring 3 is pressed against the opening edge of the through-hole), so that the sealing ring 3 can seal the through-hole and can also act as a vibration reducer between the outer component and the housing 1. In this embodiment, the sensing mechanism has a simple structure and is easy to assemble and disassemble.

[0034] In one embodiment, if Figure 1 As shown, a limiting protrusion 111 is provided on the outer wall of the plug-in barrel 11. The limiting protrusion 111 is used to engage with a limiting groove (not shown) provided on the inner side wall of the through hole. It can be understood that the limiting groove is provided on the inner side wall of the through hole. When the plug-in barrel 11 is rotated and inserted into the through hole, the limiting protrusion 111 is screwed into the limiting groove, indicating that the plug-in barrel 11 has been inserted into the through hole, thereby ensuring the stability of the sensor mechanism installed on the external component.

[0035] In one embodiment, if Figure 1 As shown, the limiting plate 12 is provided with a positioning protrusion 121 protruding toward the detection head 2. The positioning protrusion 121 is used to be plugged into a positioning hole (not shown) provided on the external component. It is understandable that one or more positioning protrusions 121 and positioning holes can be provided according to actual needs.

[0036] Specifically, when the plug-in tube 11 is docked with the through hole, the positioning protrusion 121 is inserted into the positioning hole, and there is a transition fit between the positioning protrusion 121 and the positioning hole; when the plug-in tube 11 is rotated and inserted into the through hole, the positioning protrusion 121 rotates in the positioning hole; when the plug-in tube 11 has been inserted into the through hole, the positioning protrusion 121 is clamped in the positioning hole, and the limiting protrusion 111 is screwed into the limiting groove, further ensuring the stability of the sensing mechanism installed on the external component.

[0037] In one embodiment, if Figure 1 As shown, the cover 1 also includes a docking sleeve 14 connected to the shell 13, and the docking sleeve 14 is provided with a docking hole 141 that communicates with the internal space; the sensing mechanism also includes a guide pin 6 installed in the docking hole 141, and the end of the guide pin 6 away from the docking sleeve 14 extends into the internal space and is electrically connected to the circuit board 4. It can be understood that the plug-in sleeve 11, the limit plate 12, the shell 13 and the docking sleeve 14 are an integrally formed part, and the center line of the docking hole 141 is perpendicular to the center line of the internal space. The controller's connector can be plugged into the docking hole 141, and the conductive component on the connector docks with the guide pin 6, so that the controller can be electrically connected to the control board through the guide pin 6. In this embodiment, the connection operation between the sensing mechanism and the controller is simple.

[0038] Preferably, the guide pin 6 is provided with a silver plating layer. The design of the silver plating layer enables the guide pin 6 to withstand higher levels of vibration and higher temperatures.

[0039] In one embodiment, if Figure 1 As shown, the sensor mechanism further includes a cover plate 7. The housing 1 is also provided with a mounting opening that communicates with the internal space. The cover plate 7 is connected to the housing 1 and is used to cover the mounting opening. It is understood that the mounting opening is provided at the end of the housing 13 facing away from the docking socket 14, and the detection control board can be installed within the internal space and the receiving hole 21 through the mounting opening. The cover plate 7 is mounted to the housing 1 via a laser welding process, ensuring the stability of the cover plate 7 on the housing 1 and improving the high-temperature and vibration resistance of the sensor mechanism.

[0040] In one embodiment, the sensing mechanism further includes a temperature sensing chip (not shown) mounted on the circuit board 4. Furthermore, the detection head 2 is further provided with a detection hole connected to the accommodating hole 21, and the temperature sensing chip extends into the detection hole. When the sensing mechanism is mounted on an external component, the humidity sensing chip 5 can detect the humidity in the space to be measured of the external component, and the temperature sensing chip can detect the temperature in the space to be measured of the external component. In this embodiment, the sensing mechanism can detect both humidity and temperature, thereby improving the applicability and versatility of the sensing mechanism.

[0041] In one embodiment, if Figure 1 As shown, the sensing mechanism further includes a conditioning chip 8 mounted on the circuit board 4 and located in the internal space, and the conditioning chip 8 is used to amplify the humidity signal detected by the humidity sensing chip 5. It can be understood that the conditioning chip 8 is located in the internal space of the housing 13.

[0042] Specifically, the detected air contacts the humidity sensing chip 5 through the sensing hole 22. The humidity sensing chip 5 converts the humidity information into an electrical signal through a specific sensitive device, and transmits the electrical signal through the circuit on the circuit board 4 to the conditioning chip 8; the conditioning chip 8 converts and amplifies the electrical signal and transmits it to the wiring harness through the guide pin 6, and then transmits the signal to the controller.

[0043] In one embodiment, the sensing mechanism further includes a protective cover (not shown) sleeved on the detection head 2. It can be understood that the protective cover has high temperature resistance and corrosion resistance, thereby improving the high temperature resistance and corrosion resistance of the detection head 2.

[0044] Another embodiment of the present invention further provides a vehicle, comprising the above-mentioned sensing mechanism, wherein the sensing mechanism is installed in an engine compartment, and the humidity sensing chip 5 is used to detect the air humidity on the air intake side of the engine.

[0045] Specifically, the sensing mechanism is installed in the engine compartment, and the air on the intake side of the engine contacts the humidity sensing chip 5 through the sensing hole 22. The humidity sensing chip 5 converts the humidity information into an electrical signal through a specific sensitive device, and transmits the electrical signal through the circuit on the circuit board 4 to the conditioning chip 8; the conditioning chip 8 converts and amplifies the electrical signal and transmits it to the wiring harness through the guide pin 6, and then transmits the signal to the controller. The controller will control other actuators to make adaptive adjustments based on the obtained air humidity signal, and ultimately achieve the purpose of reducing the generation of condensed water entering the engine combustion chamber and ensuring stable engine combustion.

[0046] In a specific embodiment, an air storage space and a through hole connected to the air storage space are provided on the air intake box of the engine, the plug-in tube 11 is inserted into the through hole, the detection head 2 extends into the air storage space, the sealing ring 3 is compressed between the limit plate 12 and the outer wall of the air intake box, and the sealing ring 3 is used to seal the through hole. It can be understood that the air storage space is connected to the engine combustion chamber, and the air storage space is used to input gas into the engine combustion chamber; the humidity sensor chip is used to detect the humidity of the gas in the air storage space. In this embodiment, the sealing ring 3 prevents dust, moisture, etc. in the external environment from entering the air intake side of the engine, so that the sensing mechanism can be used in the working environment of the engine, and the detection accuracy and service life of the sensing mechanism are guaranteed; and the sealing ring 3 can also play a technical effect of vibration isolation between the cover 1 and the air intake box.

[0047] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sensing mechanism, characterized in that: It comprises a cover shell, a detection head, a sealing ring, a circuit board and a humidity sensing chip mounted on the circuit board; the detection head is provided with a receiving hole and a sensing hole connected to the receiving hole, and the cover shell is provided with an internal space; The detection head is mounted on the housing, and the internal space is connected to the receiving hole; the circuit board is mounted in the internal space and the receiving hole, and the humidity sensing chip is located in the receiving hole and arranged opposite to the sensing hole; The sealing ring is sleeved on the cover shell; the sealing ring is used to seal the connection between the cover shell and the external component at the through hole position when the detection head is inserted into the detected space of the external component through the through hole to detect the humidity signal.

2. The sensor mechanism according to claim 1, characterized in that: The housing comprises a plug-in cylinder, a limit plate and a shell connected in sequence, the internal space is arranged on the plug-in cylinder, the limit plate and the shell, the detection head is mounted on an end of the plug-in cylinder away from the limit plate, and the sealing ring is sleeved on the plug-in cylinder; When the detection head extends into the space to be detected, the plug-in tube is inserted into the through hole, the two opposite end surfaces of the sealing ring respectively abut against the limit plate and one end of the outer component away from the space to be detected, and the sealing ring is used to seal the through hole.

3. The sensing mechanism according to claim 2, characterized in that: A limiting convex portion is provided on the outer wall of the plug-in cylinder, and the limiting convex portion is used to be clamped with a limiting groove provided on the inner side wall of the through hole.

4. The sensing mechanism according to claim 2, characterized in that: The limit plate is provided with a positioning protrusion protruding toward the detection head, and the positioning protrusion is used to be plugged into a positioning hole provided on the external component.

5. The sensing mechanism according to claim 2, characterized in that: The housing further comprises a docking sleeve connected to the shell, and the docking sleeve is provided with a docking hole communicating with the internal space; The sensor mechanism further comprises a guide pin installed in the docking hole, wherein one end of the guide pin away from the docking tube extends into the internal space and is electrically connected to the circuit board.

6. The sensing mechanism according to claim 1, characterized in that: The sensor mechanism also includes a cover plate, and the cover shell is also provided with an installation opening connected to the internal space; the cover plate is connected to the cover shell and is used to cover the installation opening.

7. The sensing mechanism according to claim 1, characterized in that: The sensing mechanism also includes a temperature sensing chip mounted on the circuit board.

8. The sensing mechanism according to claim 1, characterized in that: The sensing mechanism further comprises a conditioning chip mounted on the circuit board and located in the internal space, wherein the conditioning chip is used to amplify the humidity signal detected by the humidity sensing chip.

9. The sensing mechanism according to claim 1, characterized in that: The sensing mechanism also includes a protective cover sleeved on the detection head.

10. A vehicle, characterized in that: It comprises the sensing mechanism as claimed in any one of claims 1 to 9, wherein the sensing mechanism is installed in the engine compartment, and the humidity sensing chip is used to detect the air humidity on the intake side of the engine.

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