A sensing mechanism and a vehicle

Abstract

The present invention belongs to the technical field of sensors, and particularly relates to a sensing mechanism and a vehicle. The sensing mechanism includes 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 communicating with the receiving hole, and the housing is provided with an internal space; the detection head is mounted on the housing, and the internal space communicates with 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 is disposed opposite to the sensing hole; the sealing ring is sleeved on the housing; when the detection head passes through a through hole and is inserted into a space to be measured of an external component to detect a humidity signal, the sealing ring is used to seal the connection part of the housing and the external component at the through hole position. In the present invention, the sealing ring prevents dust, moisture, etc. in the external environment from entering the intake side of the engine, so that the sensing mechanism can be applied to the working environment of the engine, and the detection accuracy and service life of the sensing mechanism are ensured.

Description

Technical Field

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

[0002] In order to improve the fuel economy of an engine, the EGR (Exhaust Gas Re-circulation) technology is widely applied to the engine. However, the introduction of the EGR technology will bring condensate water to the engine. The condensate water will be carried into the combustion chamber of the engine along with the flow of the intake air. Under extreme working conditions, the condensate water in the combustion chamber will damage the combustion stability of the engine and even cause the engine to misfire. In order to reduce the condensate water flowing into the combustion chamber of the engine from the intake side, it is necessary to use a humidity sensor to detect the air humidity on the intake side of the engine.

[0003] In the prior art, most humidity sensors are applied in the passenger compartment or the air-conditioning pipeline. The passenger compartment or the air-conditioning pipeline has a relatively good environment without harsh working conditions such as high temperature, dust, immersion in water, and vibration. Therefore, the existing humidity sensors are relatively poor in structure and performance. However, an engine often works in harsh environments such as high temperature, vibration, and dust. Therefore, the existing humidity sensors will be easily damaged or have low measurement accuracy when used in the above-mentioned harsh engine working environments. Summary of the Invention

[0004] Aiming at the technical problems that the humidity sensor in the prior art will be easily damaged or have low measurement accuracy when used in the engine working environment, the present invention provides a sensing mechanism and a vehicle.

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

[0006] The detection head is mounted on the housing, and the internal space communicates with 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 is disposed opposite to the sensing hole;

[0007] The sealing ring is sleeved on the housing; when the detection head passes through a through hole and inserts into a measurement space of an external component to detect a humidity signal, the sealing ring is used to seal the connection part of the housing and the external component at the through hole position.

[0008] Optionally, the housing includes a plug-in cylinder, a limit plate, and a housing that are sequentially connected. The internal space is provided on the plug-in cylinder, the limit plate, and the housing. The detection head is installed at one 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 measured, the plug-in cylinder is inserted into the through hole. The opposite end faces of the sealing ring are respectively abutted against the limit plate and one end of the external component away from the space to be measured, and the sealing ring is used to seal the through hole.

[0010] Optionally, a limit convex portion is provided on the outer wall of the plug-in cylinder, and the limit convex portion is used for clamping with a limit groove provided on the inner side wall of the through hole.

[0011] Optionally, a positioning convex portion protruding towards the detection head is provided on the limit plate, and the positioning convex portion is used for inserting into a positioning hole provided on the external component.

[0012] Optionally, the housing further includes a docking cylinder connected to the housing, and a docking hole communicating with the internal space is provided on the docking cylinder.

[0013] The sensing mechanism further includes a guide pin installed in the docking hole. 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 an installation opening communicating with the internal space is further provided on the housing; the cover plate is connected to the housing and is used for covering the installation opening.

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

[0016] Optionally, the sensing mechanism further includes a conditioning chip installed on the circuit board and located in the internal space. The conditioning chip is used for amplifying the humidity signal detected by the humidity sensing chip.

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

[0018] Another embodiment of the present invention further provides a vehicle, including the above-mentioned sensing mechanism. The sensing mechanism is installed in the engine compartment, and the humidity sensing chip is used for detecting the air humidity on the intake side of the engine.

[0019] In the present invention, the detection head is provided with a receiving hole and an induction hole communicating with the receiving hole, and the housing is provided with an internal space; the detection head is mounted on the housing, the internal space communicates with 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 is disposed opposite to the induction hole; when the housing 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. The sealing ring abuts against the edge of the opening of the through hole, 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 housing and the external component, avoiding the leakage accident of the gas in the space to be measured through the through hole, and preventing the dust in the external environment from entering the space to be measured through the through hole.

[0020] When the housing is installed in the engine compartment, the detection head can extend into the intake side of the engine, so that the humidity sensing chip can detect the humidity on the intake side of the engine. The sealing ring is used to block the through hole on the intake side of the engine. The sealing ring prevents dust, moisture, etc. in the external environment from entering the intake side of the engine, so that the sensing mechanism can be applied to the working environment of the engine, and the detection accuracy and service life of the sensing mechanism are ensured. Description of the Drawings

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

[0022] Figure 1 It is an exploded structural schematic diagram of the sensing mechanism provided by an embodiment of the present invention.

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

[0024] 1. Housing; 11. Insertion cylinder; 111. Limiting convex part; 12. Limiting plate; 121. Positioning convex part; 13. Shell; 14. Docking cylinder; 141. Docking hole; 2. Detection head; 21. Receiving hole; 22. Induction hole; 3. Sealing ring; 4. Circuit board; 5. Humidity sensing chip; 6. Guide pin; 7. Cover plate; 8. Conditioning chip. Detailed Embodiments

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

[0026] It should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "middle", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present invention.

[0027] As Figure 1 shown, a sensing mechanism provided by the first embodiment of the present invention includes a housing 1, a detection head 2, a sealing ring 3, a circuit board 4, and a humidity sensing chip 5 mounted on the circuit board 4; the detection head 2 is provided with a receiving hole 21 and a sensing hole 22 communicating with the receiving hole 21, and the housing 1 is provided with an internal space; the detection head 2 is mounted on the housing 1, and the internal space communicates with the receiving hole 21; the circuit board 4 is mounted in the internal space and the receiving hole 21, and the humidity sensing chip 5 is located in the receiving hole 21 and is disposed 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 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 housing 1; the sealing ring 3 is used to seal the connection part between the housing 1 and the external component at the position of the through hole when the detection head 2 passes through the through hole and inserts into the space to be measured of the external component to detect the humidity signal.

[0029] In the present invention, the detection head 2 is provided with a receiving hole 21 and a sensing hole 22 communicating with the receiving hole 21, and the housing 1 is provided with an internal space; the detection head 2 is mounted on the housing 1, the internal space communicates with the receiving hole 21, the circuit board 4 is mounted in the internal space and the receiving hole 21, and the humidity sensing chip 5 is located in the receiving hole 21 and is disposed opposite to the sensing hole 22; when the housing 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 a role in sealing the connection between the housing 1 and the external component, avoiding the accident of gas leakage in the space to be measured 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 housing 1 is installed in the engine compartment, the detection head 2 can extend into the intake side of the engine, so that the humidity sensing chip 5 can detect the humidity on the intake side of the engine. The sealing ring 3 is used to block the through hole on the intake side of the engine. The sealing ring 3 prevents dust, moisture, etc. in the external environment from entering the intake side of the engine. Thus, this sensing mechanism can be applied to the working environment of the engine and ensures the detection accuracy and service life of this sensing mechanism.

[0031] In one embodiment, as Figure 1 shown, the housing 1 includes a plug-in cylinder 11, a limit plate 12 and a housing 13 connected in sequence. The internal space is arranged on the plug-in cylinder 11, the limit plate 12 and the housing 13. The detection head 2 is installed at one end of the plug-in cylinder 11 away from the limit plate 12. 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 housing 13 are integrally formed. In a specific embodiment, the plug-in cylinder 11 is a cylinder, the limit plate 12 is a disc, the housing 13 is a square shell, and the cylinder is coaxially arranged with the disc. The outer diameter of the cylinder is smaller than the outer diameter of the disc.

[0032] When the detection head 2 extends into the space to be measured, the plug-in cylinder 11 is plugged into the through hole. The opposite end faces of the sealing ring 3 are respectively abutted against the limit plate 12 and one end of the external part away from the space to be measured, and the sealing ring 3 is used to seal the through hole.

[0033] Specifically, the plug-in cylinder 11 can be plugged into the through hole of the external part through a threaded structure. The detection head 2 extends into the space to be measured of the external part. The housing 13 is located in the external environment of the external part. The sealing ring 3 is pressed between the limit plate 12 and the external part (that is, the sealing ring 3 is pressed against the opening edge of the through hole). Thus, the sealing ring 3 can play a role in sealing the through hole, and the sealing ring 3 can play a role in damping between the external part and the housing 1. In this embodiment, the structure of this sensing mechanism is simple and the disassembly and assembly operations are convenient.

[0034] In one embodiment, as Figure 1 shown, a limit convex part 111 is arranged on the outer wall of the plug-in cylinder 11. The limit convex part 111 is used for clamping with a limit groove (not shown in the figure) arranged on the inner side wall of the through hole. It can be understood that the limit groove is arranged on the inner side wall of the through hole. During the process that the plug-in cylinder 11 rotates and is plugged into the through hole, the limit convex part 111 is screwed into the limit groove, indicating that the plug-in cylinder 11 has been plugged in place in the through hole, ensuring the stability of this sensing mechanism installed on the external part.

[0035] In one embodiment, asFigure 1 As shown in the figure, a positioning convex portion 121 protruding towards the detection head 2 is provided on the limiting plate 12, and the positioning convex portion 121 is used for inserting into a positioning hole (not shown in the figure) provided on the external component. It can be understood that one or more positioning convex portions 121 and positioning holes can be provided according to actual requirements.

[0036] Specifically, when the insertion cylinder 11 is docked with the through hole, the positioning convex portion 121 is inserted into the positioning hole, and there is an interference fit between the positioning convex portion 121 and the positioning hole; during the process of the insertion cylinder 11 being rotationally inserted into the through hole, the positioning convex portion 121 rotates in the positioning hole; when the insertion cylinder 11 has been inserted in place in the through hole, the positioning convex portion 121 is clamped in the positioning hole, and the limiting convex portion 111 is screwed into the limiting groove, further ensuring the stability of the sensing mechanism installed on the external component.

[0037] In one embodiment, as Figure 1 shown, the cover 1 further includes a docking cylinder 14 connected to the housing 13, and a docking hole 141 communicating with the internal space is provided on the docking cylinder 14; the sensing mechanism further includes a guide pin 6 installed in the docking hole 141, and one end of the guide pin 6 away from the docking cylinder 14 extends into the internal space and is electrically connected to the circuit board 4. It can be understood that the insertion cylinder 11, the limiting plate 12, the housing 13, and the docking cylinder 14 are integrally formed, the center line of the docking hole 141 is perpendicular to the center line of the internal space, and the plug-in component of the controller can be inserted into the docking hole 141, and the conductive component on the plug-in component is docked 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, a silver plating layer is provided on the guide pin 6. 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, as Figure 1 shown, the sensing mechanism further includes a cover plate 7, and an installation opening communicating with the internal space is further provided on the cover 1; the cover plate 7 is connected to the cover 1 and is used for covering the installation opening. It can be understood that the installation opening is provided at one end of the housing 13 facing away from the docking cylinder 14, and the detection control board can be installed in the internal space and the receiving hole 21 through the installation opening; the cover plate 7 can be installed on the cover 1 through a laser welding process, ensuring the stability of the cover plate 7 covering the cover 1 and improving the high-temperature and vibration resistance performance of the sensing mechanism.

[0040] In one embodiment, the sensing mechanism further includes a temperature sensing chip (not shown in the figure) mounted on the circuit board 4. Further, a detection hole communicating with the accommodation hole 21 is further provided on the detection head 2, 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, improving the applicability and versatility of the sensing mechanism.

[0041] In one embodiment, as Figure 1 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 air to be detected 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 sensor 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 wire 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 in the figure) sleeved on the detection head 2. It can be understood that the protective cover has the properties of high temperature resistance and corrosion resistance, so the protective cover improves the high temperature resistance and corrosion resistance of the detection head 2.

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

[0045] Specifically, the sensing mechanism is mounted 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 sensor 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 wire harness through the guide pin 6, and then transmits the signal to the controller. The controller will make adaptive adjustments to other actuators according to the obtained air humidity signal, and finally 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 communicating with the air storage space are provided on the air intake box of the engine. The insertion cylinder 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 limiting 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 communicates with the engine combustion chamber, and the air storage space is used to input gas into the engine combustion chamber; the humidity sensing 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 applied to the working environment of the engine, and the detection accuracy and service life of the sensing mechanism are ensured; and the sealing ring 3 can also play a vibration isolation technical effect between the housing 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 replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sensing mechanism, characterized in that, It includes 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 communicating with the receiving hole, and the housing is provided with an internal space; The detection head is mounted on the housing, and the internal space communicates with 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 is disposed opposite to the sensing hole; The sealing ring is sleeved on the housing; the sealing ring is used for sealing the connection part of the housing and the external component at the through-hole position when the detection head passes through the through-hole and inserts into the space to be measured of the external component to detect the humidity signal; the external component is an engine compartment; The housing includes a plug-in cylinder, a limiting plate, and a housing connected in sequence, the internal space is arranged on the plug-in cylinder, the limiting plate, and the housing, the detection head is mounted at one end of the plug-in cylinder away from the limiting plate, and the sealing ring is sleeved on the plug-in cylinder; When the detection head extends into the space to be measured, the plug-in cylinder is inserted into the through-hole, and the opposite end faces of the sealing ring respectively abut against the limiting plate and one end of the external component away from the space to be measured, and the sealing ring is used for sealing the through-hole.

2. The sensing mechanism according to claim 1, wherein The outer wall of the plug-in cylinder is provided with a limiting convex portion, and the limiting convex portion is used for being clamped with a limiting groove arranged on the inner side wall of the through-hole.

3. The sensing mechanism according to claim 1, characterized in that, The limiting plate is provided with a positioning convex portion protruding towards the detection head, and the positioning convex portion is used for being inserted into a positioning hole arranged on the external component.

4. The sensing mechanism according to claim 1, characterized in that, The housing further includes a docking cylinder connected to the housing, and the docking cylinder is provided with a docking hole communicating with the internal space; The sensing mechanism further includes a guide pin mounted in the docking hole, and one end of the guide pin away from the docking cylinder extends into the internal space and is electrically connected to the circuit board.

5. The sensing mechanism according to claim 1, characterized in that, The sensing mechanism further includes a cover plate, and the housing is further provided with an installation opening communicating with the internal space; the cover plate is connected to the housing and is used for covering the installation opening.

6. The sensing mechanism according to claim 1, wherein The sensing mechanism further includes a temperature sensing chip mounted on the circuit board.

7. The sensing mechanism according to claim 1, characterized in that, The sensing mechanism further includes a conditioning chip mounted on the circuit board and located in the internal space, and the conditioning chip is used for amplifying the humidity signal detected by the humidity sensing chip.

8. The sensing mechanism according to claim 1, wherein The sensing mechanism further includes a protective sleeve sleeved on the detection head.

9. A vehicle, characterized in that, It includes the sensing mechanism according to any one of claims 1 to 8, the sensing mechanism is mounted in the engine compartment, and the humidity sensing chip is used for detecting the air humidity on the intake side of the engine.

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