A pressure sensor for monitoring wind pressure in brake cylinders of freight train vehicles

Abstract

The present invention discloses a pressure sensor for monitoring the wind pressure of a brake cylinder of a freight train vehicle, comprising a metal screw head, a sensor module being provided in the middle of one side of the metal screw head, a circular edge groove being provided at a non-center position of one side of the metal screw head, a plastic protective shell being provided inside the circular edge groove, and an anti-foolproofing position being provided at one end of one side of the metal screw head; the present invention enables the vehicle brake cylinder to be remodeled through the cooperation of a plastic package shell, protective glue, a sealing layer, an ADC chip, a pressure DIE chip, an RFID chip, a pressure chip PCBA, a communication antenna, a sensor module PCBA and a grounding copper sheet, thereby effectively reducing the difficulty of maintaining the brake cylinder and improving convenience; the pressure sensor has a unique identity ID, which can be bound to the vehicle license plate number through a handheld reader or automatically bound to the vehicle license plate number through an intelligent management system, thereby facilitating subsequent identification of the vehicle.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure sensors, in particular to a pressure sensor used for monitoring the wind pressure of brake cylinders of freight train vehicles. Background Art

[0002] There are many types of freight cars used in railways. The most common one in modern times is the container car. A freight train generally has 50 to 60 cars (vehicles). Except for the locomotive which has an internal combustion engine, other vehicles have no power supply. The main braking method of freight trains is air braking.

[0003] The current air brake cylinders on freight trains have the following inconveniences:

[0004] The air pressure in the air brake cylinder directly affects the braking ability. A failure in the brake device will prevent the compressed air in the brake cylinder from being discharged, resulting in a semi-locked brake state. In this case, the vehicle's brake pads will suffer abnormal wear and tear, resulting in the brake pads being scrapped, and there is a risk of vehicle derailment and rollover accidents. Some freight trains use sensors to detect the air brake cylinders of freight trains, but due to the long-term travel of freight trains, these sensors are also extremely prone to damage. Summary of the Invention

[0005] The object of the present invention is to provide a pressure sensor for monitoring the wind pressure of brake cylinders of freight train vehicles, so as to solve the related problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: comprising a metal screw head, a sensor module is provided in the middle of one side of the metal screw head, a circular edge groove is provided at a non-center position of one side of the metal screw head, a plastic protective shell is provided inside the circular edge groove, one end of one side of the metal screw head is provided with an anti-foolproof position, an inner screw thread is provided in the middle of one side of the metal screw head, a plastic outer screw thread is provided on one side of the outer side of the sensor module, and the plastic outer screw thread and the inner screw thread are adapted to each other, an anti-bone-stripping position is provided on one side of the plastic protective shell, and the anti-bone-stripping position Anti-fouling openings are symmetrically provided at both ends, and air-avoidance windows are symmetrically provided at the top and bottom of the anti-bone-detachment position. A through hole is provided on one side of the plastic protective shell, and a top cover plate is provided inside one side of the metal screw head. Limiting plates are symmetrically provided on the top and bottom of the top cover plate. A spring is provided on one side of the limit plate, and an insertion rod is provided on one side of the spring. An annular groove is provided inside the plastic protective shell, and slots are symmetrically provided on the top and bottom of one side of the annular groove. The slots and the insertion rod are adapted to each other, and through grooves are symmetrically provided at both ends of one side of the plastic protective shell.

[0007] Preferably, the sensor module consists of a plastic shell, a protective glue, a sealing layer, an ADC chip, a pressure DIE chip, an RFID chip, a pressure chip PCBA, a communication antenna, a sensor module PCBA and a grounding copper sheet. The protective glue is located on one side of the interior of the plastic shell, and a sealing layer is provided on the outside of the protective glue. An ADC chip is provided on the top of one side of the interior of the protective glue, and a pressure DIE chip is provided on the bottom of one side of the interior of the protective glue. A pressure chip PCBA is provided on one side of the protective glue, and a sensor module PCBA is provided on one side of the pressure chip PCBA. A communication antenna is provided on one side of the sensor module PCBA, and an RFID chip is provided on the bottom of one side of the sensor module PCBA. Grounding copper sheets are symmetrically provided on the top and bottom of one side of the outer side of the plastic shell.

[0008] Preferably, an outer ring is provided on the outer side of the metal screw head, and the outer ring is made of a hexagonal structure.

[0009] Preferably, a spiral groove is provided on one side of the top cover plate, and anti-slip grooves are provided inside the spiral groove.

[0010] Preferably, the through groove is communicated with the annular groove, and the limiting plate and the through groove are adapted to each other.

[0011] Preferably, a plurality of groups of ventilation holes are evenly provided on one side of the interior of the metal screw head, and a metal external thread is provided on one side of the exterior of the metal screw head.

[0012] Preferably, a sealing layer is provided on the outer side of the protective adhesive, and the sealing layer is made of epoxy resin material.

[0013] Preferably, the communication antenna and the grounding copper sheet are welded to the circuit inside the sensor module PCBA.

[0014] Preferably, after the plastic protective shell and the metal screw head are assembled, the connection gap between them is sealed with a waterproof sealant.

[0015] Compared with the prior art, the present invention provides a pressure sensor for monitoring the wind pressure of brake cylinders of freight train vehicles, which has the following beneficial effects:

[0016] 1. The present invention, through the cooperation of a plastic shell, protective glue, a sealing layer, an ADC chip, a pressure DIE chip, an RFID chip, a pressure chip PCBA, a communication antenna, a sensor module PCBA and a grounding copper sheet, enables the vehicle brake cylinder to be reconstructed, effectively reducing the difficulty of maintaining the brake cylinder and improving convenience. The pressure sensor has a unique identity ID, which can be bound to the vehicle license plate through a handheld reader or automatically bound to the vehicle license plate through an intelligent management system, thereby facilitating subsequent vehicle identification. The pressure sensor has the functions of high precision, high sensitivity, high shock resistance and waterproofness, lossless signal transmission during high-speed movement and wireless charging, thereby being able to detect the vehicle brake cylinder for a long time, and the pressure sensor can be replenished with power through an underground antenna during vehicle driving.

[0017] 2. Through the cooperation of the top cover plate, through hole, plug rod, spring, annular groove, limit plate and slot, if the communication antenna is damaged during driving of the vehicle, the plastic protective shell can be quickly opened for maintenance. In addition, during daily use, the communication antenna will be hidden inside the plastic protective shell, effectively preventing it from being damaged and increasing its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 An exploded view of the present invention;

[0019] Figure 2 It is a front cross-sectional view of the sensor module of the present invention;

[0020] Figure 3 This is a front view of the metal screw head of the present invention;

[0021] Figure 4 It is a side view of the metal screw head of the present invention;

[0022] Figure 5 This is a front view of the plastic protective case of the present invention;

[0023] Figure 6 A top view of the plastic protective case of the present invention;

[0024] Figure 7 is a side view of the plastic protective case of the present invention;

[0025] Figure 8 This is a front cross-sectional view of the plastic protective case of the present invention;

[0026] Figure 9 For the present invention Figure 8 Enlarged view of point A.

[0027] In the figure: 1. Metal screw head; 2. Sensor module; 3. Plastic protective shell; 4. Plastic package shell; 5. Plastic external screw thread; 6. Protective glue; 7. Sealing layer; 8. ADC chip; 9. Pressure DIE chip; 10. RFID chip; 11. Pressure chip PCBA; 12. Communication antenna; 13. Sensor module PCBA; 14. Grounding copper sheet; 15. Metal external screw thread; 16. Outer ring; 17. Anti-foolproof position; 18. Circular edge groove; 19. Inner screw thread; 20. Ventilation hole; 21. Airproof window; 22. Anti-foolproof opening; 23. Anti-bone dislocation position; 24. Through groove; 25. Top cover plate; 26. Through hole; 27. Insert rod; 28. Spring; 29. ​​Annular groove; 30. Limit plate; 31. Slot. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] See also Figure 1-9 The present invention provides a technical solution: a pressure sensor for monitoring the wind pressure of the brake cylinder of a freight train vehicle, comprising a metal screw head 1, a sensor module 2 is provided in the middle of one side of the metal screw head 1, a circular edge groove 18 is provided at a non-center position on one side of the metal screw head 1, a plastic protective shell 3 is provided inside the circular edge groove 18, an anti-foolproofing position 17 is provided at one end of one side of the metal screw head 1, an inner screw thread 19 is provided in the middle of one side of the metal screw head 1, a plastic outer screw thread 5 is provided on one side of the outer side of the sensor module 2, and the plastic outer screw thread 5 and the inner screw thread 19 are adapted to each other, and an anti-slip bone position 23 is provided on one side of the plastic protective shell 3 to prevent slipping. Anti-fool openings 22 are symmetrically provided at both ends of the bone position 23, and air-avoidance windows 21 are symmetrically provided at the top and bottom of the anti-bone-detachment position 23. A through hole 26 is provided on one side of the plastic protective shell 3, and a top cover plate 25 is provided inside one side of the metal screw head 1. Limiting plates 30 are symmetrically provided at the top and bottom of the top cover plate 25. A spring 28 is provided on one side of the limiting plate 30, and an insertion rod 27 is provided on one side of the spring 28. An annular groove 29 is provided inside the plastic protective shell 3, and slots 31 are symmetrically provided at the top and bottom of one side of the annular groove 29. The slots 31 are adapted to each other, and through grooves 24 are symmetrically provided at both ends of one side of the plastic protective shell 3.

[0030] As a preferred solution of this embodiment: the sensor module 2 is composed of a plastic shell 4, a protective glue 6, a sealing layer 7, an ADC chip 8, a pressure DIE chip 9, an RFID chip 10, a pressure chip PCBA11, a communication antenna 12, a sensor module PCBA13 and a grounding copper sheet 14. The protective glue 6 is located on one side of the interior of the plastic shell 4, and the outer side of the protective glue 6 is provided with a sealing layer 7. The top of one side of the interior of the protective glue 6 is provided with an ADC chip 8, and the bottom of one side of the interior of the protective glue 6 is provided with a pressure DIE chip 9. One side of the protective glue 6 is provided with a pressure chip PCBA11, and one side of the pressure chip PCBA11 is provided with a sensor module PCBA13. One side of the sensor module PCBA13 is provided with a communication antenna 12, and the bottom of one side of the sensor module PCBA13 is provided with an RFID chip 10. The top and bottom of one side of the outer side of the plastic shell 4 are symmetrically provided with grounding copper sheets 14. During the driving of the car, the wind pressure can be effectively detected, and during the detection process.

[0031] As a preferred solution of this embodiment: an outer ring 16 is provided on the outer side of the metal screw head 1, and the outer ring 16 is made of a hexagonal structure, which can improve the gripping force during the disassembly and installation process.

[0032] As a preferred solution of this embodiment: a rotation groove is provided on one side of the top cover plate 25, and anti-slip grooves are provided inside the rotation groove to facilitate its rotation and reduce the difficulty of its rotation.

[0033] As a preferred solution of this embodiment, the through groove 24 is communicated with the annular groove 29 , and the limiting plate 30 and the through groove 24 are adapted to each other for easy connection.

[0034] As a preferred solution of this embodiment: a plurality of ventilation holes 20 are evenly provided on one side of the interior of the metal screw head 1, and a metal external thread 15 is provided on one side of the exterior of the metal screw head 1, which improves the strength of the connection and facilitates disassembly and assembly.

[0035] As a preferred solution of this embodiment: a sealing layer 7 is provided on the outer side of the protective glue 6. The sealing layer 7 is made of epoxy resin material to facilitate sealing.

[0036] As a preferred solution of this embodiment: the communication antenna 12 and the grounding copper sheet 14 are welded to the circuit inside the sensor module PCBA 13, so that the installation effect is more stable.

[0037] As a preferred solution of this embodiment: after the plastic protective shell 3 and the metal screw head 1 are assembled, the connection gap between them is sealed with a waterproof sealant to prevent the external environment from affecting the communication antenna 12.

[0038] Example 1, as Figure 1 、 2As shown in Figure 3, during assembly, the pressure DIE chip 9 and the ADC chip 8 are first welded to the pressure chip PCBA11, and the pressure chip PCBA11 is encapsulated with protective glue 6 and installed in the plastic shell 4. The RFID chip 10, the communication antenna 12 and the grounding copper sheet 14 are welded to the circuit of the sensor module PCBA13, and the sensor module PCBA13 is encapsulated in the plastic shell 4 using the sealing layer 7, thereby completing the assembly of the sensor module 2. The sensor module 2 is then screwed into the metal screw head 1, and finally the sensor module PCBA13 on the plastic protective shell 3 is embedded in the circular edge groove 18 on the metal screw head 1. After the plastic protective shell 3 and the metal screw head 1 are assembled, the connection gap is sealed with waterproof sealant or other sealing treatment.

[0039] Example 2, as Figure 1 、 2 As shown in Figure 3, if the communication antenna 12 is damaged, the top cover plate 25 is rotated, thereby driving the limit plate 30 to rotate, applying pressure to the insertion rod 27, so that the insertion rod 27 disengages from the slot 31, and drives the spring 28 to be compressed. When the limit plate 30 is rotated to overlap with the through slot 24, the top cover plate 25 can be removed from the plastic protective shell 3, so that the communication antenna 12 can be repaired.

[0040] Working principle: During assembly, first weld the pressure DIE chip 9 and the ADC chip 8 to the pressure chip PCBA11, and encapsulate the pressure chip PCBA11 with protective glue 6 and install it in the plastic shell 4. Weld the RFID chip 10, the communication antenna 12 and the grounding copper sheet 14 to the circuit of the sensor module PCBA13, and use the sealing layer 7 to encapsulate the sensor module PCBA13 in the plastic shell 4, thereby completing the assembly of the sensor module 2. Then, screw the sensor module 2 into the metal screw head 1, and finally embed the sensor module PCBA13 on the plastic protective shell 3 into the circular edge groove 18 on the metal screw head 1. After the plastic protective shell 3 and the metal screw head 1 are assembled, the connection gap is sealed with waterproof sealant or other methods.

[0041] If the communication antenna 12 is damaged, the top cover 25 is rotated, thereby driving the limit plate 30 to rotate, applying pressure to the insertion rod 27, causing the insertion rod 27 to disengage from the slot 31, and driving the spring 28 to be compressed. When the limit plate 30 is rotated to overlap with the through slot 24, the top cover 25 can be removed from the plastic protective shell 3, and the communication antenna 12 can be repaired.

[0042] When the vehicle is driving, the grounding copper sheet 14 charges the sensor module PCBA13 through the buried query antenna, wakes up the pressure DIE chip 9 and the RFID chip 10, and enables them to detect and collect data on the wind pressure during driving. At the same time, the circuit signal is amplified through the communication antenna 12, and the encrypted real-time pressure data information with an independent ID is communicated in the ultra-high frequency band.

[0043] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions of the technical solution of the present invention by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the present invention.

Claims

1. A pressure sensor for monitoring the wind pressure of a brake cylinder of a freight train vehicle, comprising a metal screw head (1), characterized in that: A sensor module (2) is provided in the middle of one side of the metal screw head (1), a circular edge groove (18) is provided at a non-center position of one side of the metal screw head (1), a plastic protective shell (3) is provided inside the circular edge groove (18), an anti-fouling position (17) is provided at one end of one side of the metal screw head (1), an inner screw thread (19) is provided in the middle of one side of the metal screw head (1), a plastic outer screw thread (5) is provided on one side of the outer side of the sensor module (2), and the plastic outer screw thread (5) and the inner screw thread (19) are adapted to each other, an anti-bone-stripping position (23) is provided on one side of the plastic protective shell (3), and anti-fouling openings (22) are symmetrically provided at both ends of the anti-bone-stripping position (23), and the anti-bone-stripping position (23) is provided with a plurality of screw threads (19) on the outer side of the sensor module (2). ) are symmetrically provided with air-avoiding windows (21) at the top and bottom, a through hole (26) is provided on one side of the plastic protective shell (3), a top cover plate (25) is provided inside one side of the plastic protective shell (3), a limit plate (30) is symmetrically provided at the top and bottom of the top cover plate (25), a spring (28) is provided on one side of the limit plate (30), a plug rod (27) is provided on one side of the spring (28), an annular groove (29) is provided inside the plastic protective shell (3), a slot (31) is symmetrically provided at the top and bottom of one side of the annular groove (29), the slot (31) and the plug rod (27) are adapted to each other, and through grooves (24) are symmetrically provided at both ends of one side of the plastic protective shell (3), Wherein: the sensor module (2) is composed of a plastic shell (4), a protective glue (6), a sealing layer (7), an ADC chip (8), a pressure DIE chip (9), an RFID chip (10), a pressure chip PCBA (11), a communication antenna (12), a sensor module PCBA (13) and a grounding copper sheet (14); the protective glue (6) is located on one side of the interior of the plastic shell (4); the sealing layer (7) is provided on the outside of the protective glue (6); the ADC chip (8) is provided on the top of one side of the interior of the protective glue (6); the pressure DIE chip (9) is provided on the bottom of one side of the interior of the protective glue (6); the pressure chip PCBA (11) is provided on one side of the protective glue (6); the sensor module PCBA (13) is provided on one side of the pressure chip PCBA (11); the communication antenna (12) is provided on one side of the sensor module PCBA (13); the RFID chip (10) is provided on the bottom of one side of the sensor module PCBA (13); the grounding copper sheet (14) is symmetrically provided on the top and bottom of one side of the outer side of the plastic shell (4); Wherein: an outer ring (16) is provided on the outer side of the metal screw head (1), and the outer ring (16) is made of a hexagonal structure. Wherein: a rotary groove is provided on one side of the top cover plate (25), and anti-slip grooves are provided inside the rotary groove. Wherein: the through groove (24) is communicated with the annular groove (29), and the limiting plate (30) and the through groove (24) are adapted to each other. Wherein: a plurality of groups of ventilation holes (20) are evenly arranged on one side of the interior of the metal screw head (1), and a metal outer screw thread (15) is arranged on one side of the exterior of the metal screw head (1). Wherein: a sealing layer (7) is provided on the outer side of the protective glue (6), and the sealing layer (7) is made of epoxy resin material. Wherein: the communication antenna (12) and the grounding copper sheet (14) are welded to the circuit inside the sensor module PCBA (13), Wherein: after the plastic protective shell (3) and the metal screw head (1) are assembled, the connection gap between them is sealed with waterproof sealant.

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