Air suspension airbag ultrasonic ranging sensor

Abstract

The utility model relates to the technical field of automobile chassis suspensions, in particular to an air suspension airbag ultrasonic distance measuring sensor which comprises an air suspension airbag used for installing the sensor. The sensor further comprises a mounting base, a packaging lower shell, a sensitive probe, a PCB and a shell. The mounting seat is arranged at the top end of an air bag of the air suspension, the mounting seat is provided with a packaging lower shell, the sensitive probe is electrically connected with the PCB, the shell is connected with the packaging lower shell, and the sensitive probe and the PCB are located in the packaging lower shell and the shell; according to the utility model, the problems of complex structure, inconvenience in installation, difficulty in maintenance and higher maintenance cost of the existing vehicle body lift-off sensor are solved, the simplification of the structure of the vehicle body lift-off sensor is realized, the installation and the maintenance are more convenient, and the maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of automotive chassis suspension technology, and in particular to an ultrasonic ranging sensor for air suspension airbags. Background Technology

[0002] The suspension system is the support system between the vehicle body and the tires. Its function is to support the vehicle body, improve ride comfort, and enhance driving comfort. With the development of the automotive industry, higher demands are placed on driving comfort. Air suspension can automatically adjust the stiffness of the springs. At high speeds, the air spring pressure increases to stiffen the suspension and ensure smooth vehicle operation; while at low speeds or during long drives, the air spring pressure decreases to soften the suspension and provide a more comfortable ride. On complex road surfaces, air suspension can adjust the vehicle's ground clearance as needed to improve vehicle passability.

[0003] Traditional ground clearance sensors are photoelectric sensors. The sensor body is mounted on the vehicle body, and a rotating shaft is arranged on the sensor body. The rotating shaft is connected to the suspension system via a connecting rod. When the vehicle height changes, the connecting rod moves relative to the vehicle body, causing the connecting rod to rotate the rotating shaft. By measuring the rotation angle of the rotating shaft, the deformation of the suspension device is calculated to obtain the vehicle's ground clearance. However, traditional ground clearance sensors have a complex structure, are inconvenient to install, and are difficult and costly to repair when they malfunction.

[0004] Therefore, this utility model provides an ultrasonic ranging sensor for air suspension airbags. Utility Model Content

[0005] The purpose of this invention is to propose an ultrasonic ranging sensor for air suspension airbags, which solves the problems of complex structure, inconvenient installation, difficult maintenance, and high maintenance cost of existing vehicle ground clearance sensors. This invention simplifies the structure of the vehicle ground clearance sensor, making installation and maintenance more convenient and reducing maintenance costs.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An ultrasonic ranging sensor for an air suspension airbag includes a telescopic airbag for mounting the sensor; it also includes a mounting base, a lower enclosure, a sensitive probe, a PCB board, and a housing; the mounting base is disposed at the top of the telescopic airbag, the lower enclosure is disposed on the mounting base, the sensitive probe is electrically connected to the PCB board, the housing is connected to the lower enclosure, and the sensitive probe and the PCB board are located inside the lower enclosure and the housing.

[0008] Preferably, the PCB board is provided with a pressure chip and a temperature sensor, and the pressure chip and temperature sensor are located close to the sensitive probe.

[0009] Preferably, the telescopic airbag communicates with the sealed cavity formed by the mounting base, the lower encapsulation shell, and the outer shell, and the telescopic airbag is sealed to the mounting base.

[0010] Preferably, the sensitive probe is electrically connected to the PCB board via an FPC cable.

[0011] Preferably, the outer casing is provided with a connector.

[0012] Preferably, the PCB board has pins provided by springs, and the pins are matched with the connectors.

[0013] The beneficial effects of this utility model are:

[0014] 1. This utility model simplifies the structure of the ultrasonic ranging sensor by placing the entire ultrasonic ranging sensor on the top of the telescopic airbag and connecting the mounting base to the telescopic airbag, thereby facilitating the installation and maintenance of the ultrasonic ranging sensor and greatly reducing the maintenance cost of the ultrasonic ranging sensor.

[0015] 2. This utility model improves the accuracy of detection results by setting a pressure chip and a temperature sensor on the PCB board, detecting the pressure and temperature inside the telescopic airbag, and correcting the time of ultrasonic wave emission and reflection. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the airbag and sensor of this utility model.

[0017] Figure 2 This is a cross-sectional view of the sensor of this utility model.

[0018] Figure 3 This is an exploded view of the sensor of this utility model.

[0019] Figure 4 This is a three-dimensional structural diagram of the PCB board of this utility model.

[0020] In the diagram: 1. Mounting base; 2. Lower casing; 3. Sensitive probe; 4. PCB board; 41. Pressure chip; 42. Temperature sensor; 5. Housing; 6. Connector; 7. Spring; 8. Needle; 9. Telescopic airbag. Detailed Implementation

[0021] The method of using this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] like Figures 1 to 4As shown, an ultrasonic ranging sensor for an air suspension airbag includes a telescopic airbag 9 for mounting the sensor; it also includes a mounting base 1, a lower enclosure 2, a sensitive probe 3, a PCB board 4, and a housing 5; the mounting base 1 is disposed at the top of the telescopic airbag 9, the lower enclosure 2 is disposed on the mounting base 1, the sensitive probe 3 is electrically connected to the PCB board 4, the housing 5 is connected to the lower enclosure 2, and the sensitive probe 3 and the PCB board 4 are located inside the lower enclosure 2 and the housing 5.

[0023] Mounting base 1 and lower enclosure 2 can be connected by welding, while outer shell 5 and lower enclosure 2 can be connected by riveting. Ultrasonic waves are emitted into the telescopic airbag 9 via sensitive probe 3. The ultrasonic waves contact the bottom of the telescopic airbag 9 and are reflected. By detecting the time of ultrasonic wave reflection, the deformation of the telescopic airbag 9 is determined. The measured flight time of the ultrasonic waves is corrected to a standard flight time based on actual pressure and temperature. This standard flight time is then used to calculate the distance between the vehicle body and the ground.

[0024] The PCB board 4 is provided with a pressure chip 41 and a temperature sensor 42. The pressure chip 41 and the temperature sensor 42 are located near the sensitive probe 3.

[0025] The pressure chip 41 and temperature sensor 42 detect the pressure and temperature inside the telescopic airbag 9 when it deforms, thereby correcting the standard flight time of the ultrasonic waves and obtaining the accurate downward displacement distance of the telescopic airbag 9, making the detection results more accurate and determining the distance between the vehicle body and the ground.

[0026] The telescopic airbag 9 communicates with the sealed cavity formed by the mounting base 1, the encapsulated lower shell 2, and the outer shell 5, and the telescopic airbag 9 is sealed to the mounting base 1.

[0027] This is to ensure that the PCB board 4 inside the outer shell 5 can come into contact with the gas inside the telescopic airbag 9, so that the pressure chip 41 and temperature sensor 42 on the PCB board 4 can detect the pressure and temperature inside the telescopic airbag 9, and correct the standard flight time of the ultrasonic wave to improve the accuracy of the detection results.

[0028] The sensitive probe 3 is electrically connected to the PCB board 4 via an FPC cable. Electrical energy is delivered to the sensitive probe 3 via the FPC cable.

[0029] The outer casing 5 is provided with a connector 6. The connector 6 is used to output the internal signals of the sensitive probe 3, pressure chip 41 and temperature sensor 42 to the outside, and to accurately determine the internal information.

[0030] The PCB board 4 has a pin 8 provided by a spring 7, and the pin 8 matches the connector 6. The pin 8 is inserted into the connector 6, and the spring 7 is to prevent the pin 8 and the connector 6 from loosening during use, which would lead to poor contact between the pin 8 and the connector 6.

[0031] Working process: When the car is in motion, the sensitive probe 3 drives the transducer to emit ultrasonic waves into the telescopic airbag 9. The ultrasonic waves will come into contact with the bottom of the telescopic airbag 9 and be reflected. By measuring the time of receiving the echo, the flight distance of the ultrasonic waves is calculated. At the same time, the standard flight time of the ultrasonic waves is corrected according to the pressure and temperature of the measured medium, so as to obtain the accurate downward displacement distance of the telescopic airbag 9.

[0032] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An ultrasonic ranging sensor for an air suspension airbag, comprising a telescopic airbag (9) for mounting the sensor; characterized in that, It also includes a mounting base (1), a lower encapsulation shell (2), a sensitive probe (3), a PCB board (4), and an outer shell (5); the mounting base (1) is located at the top of the telescopic airbag (9), the lower encapsulation shell (2) is provided on the mounting base (1), the sensitive probe (3) is electrically connected to the PCB board (4), the outer shell (5) is connected to the lower encapsulation shell (2), and the sensitive probe (3) and the PCB board (4) are located inside the lower encapsulation shell (2) and the outer shell (5).

2. The ultrasonic ranging sensor for air suspension airbags according to claim 1, characterized in that: The PCB board (4) is provided with a pressure chip (41) and a temperature sensor (42). The pressure chip (41) and the temperature sensor (42) are located close to the sensitive probe (3).

3. The ultrasonic ranging sensor for air suspension airbags according to claim 1, characterized in that: The telescopic airbag (9) communicates with the sealed cavity formed by the mounting base (1), the encapsulated lower shell (2) and the outer shell (5), and the telescopic airbag (9) is sealed to the mounting base (1).

4. The ultrasonic ranging sensor for air suspension airbags according to claim 1, characterized in that: The sensitive probe (3) is electrically connected to the PCB board (4) via an FPC line.

5. The ultrasonic ranging sensor for an air suspension airbag according to claim 1, characterized in that: The outer casing (5) is provided with a connector (6).

6. The ultrasonic ranging sensor for an air suspension airbag according to claim 5, characterized in that: The PCB board (4) is provided with pins (8) via springs (7), and the pins (8) are matched with the connectors (6).

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