An overloading prevention tire pressure monitoring device and a vehicle having the same

Abstract

The utility model discloses a kind of anti-overloading tire pressure monitoring devices and vehicle with it, by tire air pressure sensor, axle height sensor, host computer and display screen composition;Tire air pressure sensor is installed at tire air door, for monitoring tire air pressure, tire temperature, ambient temperature;Axle height sensor is fixed on the lower surface of axle and is downward along plumb line direction, for monitoring wheel axle ground clearance;Host computer and display screen are installed in the position of cab for easy driver observation and operation, host computer is used to receive the signal of tire air pressure sensor, axle height sensor, according to the signal calculation whole vehicle load, and whole vehicle load signal is transported to display screen display.The utility model utilizes relatively simple hardware equipment and known intuitive data, whole vehicle total mass can be measured and calculated during loading goods, the process of goods loading can be monitored, timely stop goods loading when goods will reach vehicle loading weight limit.

Description

Technical Field

[0001] This utility model relates to the field of vehicle load detection technology, and in particular to an anti-overload tire pressure monitoring device and a vehicle having the same. Background Technology

[0002] With the continuous increase in the number of trucks, overloading will have a more serious impact on road infrastructure. Currently, the actual methods for detecting vehicle load are almost all based on weighing on a weighbridge or axle load cell after loading, with a lack of monitoring during the loading process. If the loaded cargo exceeds the permissible limit, the only option is to unload some of the cargo, affecting the driver's operational efficiency. Furthermore, many loading sites lack corresponding weighing facilities, forcing drivers to drive to nearby weighbridges or use overload detection equipment at toll stations, undoubtedly reducing truck operating efficiency. If the vehicle is confirmed to be overloaded, it must return to the loading site to unload some cargo, increasing empty mileage, which is neither economical nor environmentally friendly.

[0003] Chinese patent publication CN113532609A discloses a vehicle-mounted load detection system and calibration method. This system requires inputting a sufficient number of sets of tire pressure, temperature, tire deformation, and corresponding vehicle weight data for load detection, and then trains the system using a neural network. These characteristics make this solution difficult to adapt to the diverse configurations of commercial vehicles, placing high technical demands on users. Furthermore, this solution requires the use of tire deformation sensors, necessitating the use of specific tires and resulting in high economic costs.

[0004] Chinese Patent Publication No. CN112248738A discloses a load monitoring system and method for an electronically controlled air suspension in commercial vehicles. This system utilizes the ECAS system of the air suspension as input, calculates the single-axle load of each axle based on the pressure of the airbags on each axle, and calculates the overall vehicle load using static equilibrium equations based on the single-axle loads and the basic parameters of each axle. However, this solution requires the vehicle to be equipped with an air suspension as hardware and is incompatible with traditional leaf spring suspensions. Furthermore, this solution can only monitor the weight of tractor units and cannot achieve this function for trailers, resulting in high economic costs and limited application scope. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides an overload prevention tire pressure monitoring device and a vehicle equipped with it. This device utilizes relatively simple hardware and readily available data to calculate the total vehicle weight during loading, further lowering the user's barrier to entry. It also innovatively incorporates compatibility design with articulated trains and center-axle trains commonly found in the freight market, meeting the needs of most automotive transportation scenarios. This utility model can monitor the loading process and prompt the driver to assess the cargo weight when it is about to reach the vehicle's loading weight limit, stopping loading as needed.

[0006] This utility model is implemented as follows: an overload prevention tire pressure monitoring device, which consists of a tire pressure sensor, axle height sensor, a main unit and a display screen;

[0007] The tire pressure sensor is installed at the tire valve and is used to monitor tire pressure, tire temperature, and ambient temperature.

[0008] The axle height sensor is fixed to the lower surface of the axle and points downward along the vertical line to monitor the height of the wheel axle from the ground.

[0009] The main unit and display screen are installed in the cab in a position that is convenient for the driver to observe and operate. The main unit is used to receive signals from the tire pressure sensor and the axle height sensor, calculate the vehicle load based on the received signals, and transmit the vehicle load signal to the display screen for display.

[0010] In the above technical solution, preferably, the tire pressure sensor is tightly screwed to the tire valve via the tire valve.

[0011] In the above technical solution, preferably, the axle height sensor is installed close to the tire, which can avoid changes in axle attitude caused by changes in suspension height, so as to eliminate errors as much as possible.

[0012] In the above technical solution, preferably, the tire pressure sensor and axle height sensor are connected to the host computer via a wireless signal receiving module, and the host computer is connected to the display screen. The system receives real-time data on tire pressure, tire temperature, and wheel center height via wireless connection.

[0013] In the above technical solution, preferably, a signal relay receiving module is also provided between the host and the tire pressure sensor and the axle height sensor. To address the potential loss of wireless signals in some longer vehicles using the above equipment, the signal relay receiving module can combine the signals from multiple terminals before transmitting them to the host, thus meeting this requirement.

[0014] Compared with the prior art, the advantages and positive effects of this utility model are:

[0015] This utility model's anti-overload tire pressure monitoring device utilizes relatively simple hardware: a tire pressure sensor and an axle height sensor. By monitoring tire pressure and axle height, respectively, and combining this data with readily available information, the total vehicle weight can be calculated during loading, further lowering the user's barrier to entry. It also innovatively incorporates compatibility design for articulated and center-axle trains commonly found in the freight market. Simply installing the aforementioned sensors on each axle enables integrated weight monitoring of the tractor and trailer, eliminating the previous limitation of separate weighing for the tractor and trailer. This meets the needs of most automotive transportation scenarios and facilitates data observation for the driver. This utility model can monitor the loading process, prompting the driver to assess the cargo weight when it approaches the vehicle's load limit and stopping loading as needed.

[0016] This invention achieves rapid vehicle weighing by directly collecting information from tires and axles, avoiding the impact of traditional suspension systems on physical quantity measurements. It requires minimal vehicle modifications, is highly compatible with various vehicle configurations, and can be applied to all types of vehicles using pneumatic tires. The calibration process for the equipment is simple, requiring no complex debugging or machine learning to achieve the function. It does not use equipment that would affect the replacement of other components, allowing for free replacement after use and avoiding hidden costs for users. Attached Figure Description

[0017] Figure 1 A schematic diagram illustrating the principle of the anti-overload tire pressure monitoring device provided in this embodiment of the utility model. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Example 1

[0022] Please see Figure 1 This embodiment provides an overload prevention tire pressure monitoring device, which consists of a tire pressure sensor, an axle height sensor, a main unit, and a display screen;

[0023] The tire pressure sensor is installed at the tire valve and is used to monitor tire pressure, tire temperature, and ambient temperature.

[0024] The axle height sensor is fixed to the lower surface of the axle and points downward along the vertical line to monitor the height of the wheel axle from the ground.

[0025] The main unit and display screen are installed in the cab in a position that is convenient for the driver to observe and operate. The main unit is used to receive signals from the tire pressure sensor and the axle height sensor, calculate the vehicle load based on the received signals, and transmit the vehicle load signal to the display screen for display.

[0026] In a preferred embodiment, the tire pressure sensor is tightly screwed onto the tire valve via the tire valve, making installation convenient.

[0027] In a preferred embodiment, the axle height sensor is installed close to the tire to avoid changes in axle attitude caused by changes in suspension height, thereby minimizing errors.

[0028] In a preferred embodiment, the tire pressure sensor and axle height sensor are connected to the host computer via a wireless signal receiving module, and the host computer is connected to the display screen. The system receives real-time data on tire pressure, tire temperature, and wheel center height via wireless connection.

[0029] In a preferred embodiment, a signal relay receiving module is also provided between the host unit and the tire pressure sensor and the axle height sensor. To address the potential loss of wireless signals in some longer vehicles using the above equipment, the signal relay receiving module can combine the signals from multiple terminals before transmitting them to the host unit, thus meeting this requirement.

[0030] The tire pressure sensor and axle height sensor of the aforementioned overload prevention tire pressure monitoring device collect tire pressure and axle ground clearance data for each axle of the vehicle. Based on these parameters, the axle load of each axle and the total mass of the vehicle are calculated. The specific calculation process is described below.

[0031] 1. Single tire load calculation

[0032] Currently, almost all car tires are pneumatic tires. According to the Herz hypothesis, if the road surface in contact with the tire is regarded as an ideal rigid body, then the contact surface between the tire and the ground can be approximated as a rectangle with a width of ground contact width L and a length of ground contact length 2a.

[0033] Since the axle height sensor is not installed at the wheel center height, it is necessary to measure the compensation amount h1 between the axle height sensor and the wheel center height H. The measured value of the axle high-speed sensor is defined as h2. Therefore:

[0034] H = h1 + h2

[0035] For the j-th tire on the i-th axis, its static radius is defined as R. ij Define the wheel center height as H. ij Then we have:

[0036] 2a ij =2sin[arccos(H ij / R ij )]=2sin{arccos[(h1 ij +h2 ij ) / R ij ]}

[0037] Among them, the static radius R of the tire ij It can be obtained by referring to tables or by actual measurement.

[0038] According to Newton's third law, the force exerted on a tire during deformation is equal to the pressure exerted by the tire on the ground. Therefore, the tire pressure P of the j-th tire on the i-th axle can be obtained. ij Tire ground contact area S ij The force F acting on the tire deformation ij The ground is subjected to the pressure W of the tires ij Tire load G ij Gravitational acceleration g, wheel center height H ij The following numerical relationships exist:

[0039] S ij =L ij ×2a ij

[0040] F ij =W ij =P ij ×Sij

[0041] G ij =F ij / g

[0042] In summary, the load on the j-th tire on the i-th axis is as follows:

[0043] G ij =2(P ij ·L ij )sin{arccos[(h1 ij +h2 ij ) / R ij ]} / g=2(P ij ·L ij )sin{arccos(H ij / R ij )} / g

[0044] Then the axis load of the i-th axis is n1 is the number of tires installed on the i-th axis.

[0045] 2. Vehicle load calculation

[0046] As can be seen from the above, the total mass of the vehicle n2 represents the number of axles installed in the vehicle.

[0047] This invention achieves rapid vehicle weighing by directly collecting information from tires and axles, avoiding the impact of traditional suspension systems on physical quantity measurements. It requires minimal vehicle modifications, is highly compatible with various vehicle configurations, and can be applied to all types of vehicles using pneumatic tires. The calibration process for the equipment is simple, requiring no complex debugging or machine learning to achieve the function. It does not use equipment that would affect the replacement of other components, allowing for free replacement after use and avoiding hidden costs for users.

[0048] From a hardware perspective, this invention does not use any special dedicated sensors and exists in a relatively independent state from other vehicle components. Therefore, this invention has good compatibility with vehicle configurations and thus has ample room for iterative upgrades.

[0049] From a product experience perspective, this device monitors the weight of the entire vehicle. When transporting goods with special structures, it can effectively provide drivers with scientific data support, helping them to properly place goods and avoid potential transportation risks.

[0050] From a road traffic perspective, this invention effectively prevents vehicle overloading, protects roads, bridges, and other infrastructure, and improves the safety of other road users. It shifts the overall vehicle weight management from post-event punishment to in-process monitoring.

[0051] Furthermore, it should be noted that other functions can be added to this utility model depending on the processing performance, such as the optional cumulative weighing function depending on the product configuration.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A tire pressure monitoring device for preventing overload, characterized in that, It consists of a tire pressure sensor, an axle height sensor, a main unit, and a display screen; The tire pressure sensor is installed at the tire valve and is used to monitor tire pressure, tire temperature, and ambient temperature. The axle height sensor is fixed to the lower surface of the axle and points downward along the vertical line to monitor the height of the wheel axle from the ground. The main unit and display screen are installed in the cab in a position that is convenient for the driver to observe and operate. The main unit is used to receive signals from the tire pressure sensor and the axle height sensor, calculate the vehicle load based on the received signals, and transmit the vehicle load signal to the display screen for display.

2. The overload prevention tire pressure monitoring device according to claim 1, characterized in that: The tire pressure sensor is tightly screwed onto the tire valve via the tire valve itself.

3. The overload prevention tire pressure monitoring device according to claim 1, characterized in that: The axle height sensor is installed close to the tire.

4. The overload prevention tire pressure monitoring device according to claim 1, characterized in that: The tire pressure sensor and axle height sensor are connected to the host computer via a wireless signal receiving module, and the host computer is connected to the display screen.

5. The overload prevention tire pressure monitoring device according to claim 1, characterized in that: A signal relay receiving module is also provided between the host and the tire pressure sensor and the axle height sensor.

6. A vehicle, characterized in that: Includes the overload prevention tire pressure monitoring device as described in any one of claims 1 to 5.

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