High-precision oil quantity sensor

Abstract

The utility model relates to the technical field of sensors, in particular to a high-precision oil quantity sensor which comprises a connecting flange, an electric appliance box is arranged at the upper end of the connecting flange, a signal output wire harness is arranged on the electric appliance box, and an oil quantity monitoring mechanism is arranged at the lower end of the connecting flange. The oil mass monitoring mechanism comprises an ultrasonic measurement assembly and a capacitance measurement assembly which are fixedly installed on the connecting flange, the ultrasonic measurement assembly is sleeved with a shielding circular pipe, an installation platform is fixedly arranged on the inner side wall of the shielding circular pipe, and a temperature sensor is detachably installed on the installation platform. According to the utility model, the oil mass monitoring mechanism is arranged, and the ultrasonic measurement assembly and the capacitance measurement assembly are cooperated, so that dual-mode cooperative measurement is realized, the accuracy of oil mass measurement can be obviously improved, and the limitation (such as foam interference, oil tank shape influence and the like) of a single sensor can be effectively overcome; the method is suitable for monitoring requirements of motorcycles under complex working conditions.

Description

Technical Field

[0001] This utility model relates to the field of sensor technology, and in particular to a high-precision oil level sensor. Background Technology

[0002] Fuel measurement is a crucial part of monitoring the operating status of motorcycles. Traditional fuel level sensors mainly use float-type or resistive structures, which detect the fuel level by having a mechanical float move with the fuel surface to drive a sliding rheostat. This not only results in insufficient measurement accuracy but also poor environmental adaptability and anti-interference ability. Therefore, more and more people are trying to use capacitive or ultrasonic technologies to improve measurement performance.

[0003] However, existing capacitive sensors are susceptible to changes in the dielectric constant of fuel, while ultrasonic sensors may experience signal attenuation or misjudgment under conditions of foam, oil stains, or complex fuel tank structures, making it difficult to balance accuracy and reliability under dynamic operating conditions. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a high-precision fuel level sensor, which solves the technical problem that most existing fuel level sensors use a single detection principle and are difficult to balance accuracy and reliability under dynamic operating conditions. It has the advantage of effectively overcoming the limitations of a single sensor and being suitable for monitoring needs under complex operating conditions of motorcycles.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a high-precision fuel level sensor, including a connecting flange, an electrical box at the upper end of the connecting flange, a signal output harness on the electrical box, and a fuel level monitoring mechanism at the lower end of the connecting flange. After the vehicle is powered on, the fuel level monitoring mechanism monitors the fuel level in the fuel tank in real time and transmits the measured data to the vehicle computer through the signal output harness. The fuel level monitoring mechanism includes an ultrasonic measuring component and a capacitance measuring component fixedly installed on the connecting flange. A shielding tube is sleeved on the outside of the ultrasonic measuring component, and a mounting platform is fixedly installed on the inner wall of the shielding tube. A temperature sensor is detachably installed on the mounting platform. A vertical tube is coaxially fixedly installed at the lower end of the shielding tube, and a diamond-shaped through groove is opened on the surface of the vertical tube. During operation, the ultrasonic measuring component and the capacitance measuring component simultaneously measure the remaining fuel level in the fuel tank, thereby ensuring the accuracy of the measurement.

[0006] Preferably, the ultrasonic measurement assembly includes an ultrasonic oil level sensor fixedly installed at the lower end of the connecting flange. The housing of the ultrasonic oil level sensor is made of polytetrafluoroethylene material, which can effectively improve the durability of the ultrasonic oil level sensor and extend its service life.

[0007] Preferably, the capacitance measurement assembly includes a capacitive oil level sensor fixedly installed at the lower end of the connecting flange. The two detection electrodes of the capacitive liquid level sensor are composed of a round tube and a round shaft, which are concentrically arranged.

[0008] Preferably, both the vertical circular tube and the detection electrode of the capacitive liquid level sensor extend below the liquid surface.

[0009] Preferably, the diamond-shaped through grooves are provided in several groups at equal intervals, which can reduce the amount of foam generated in the oil tank to a certain extent, thereby improving the accuracy of measurement.

[0010] Preferably, the shielding tube is detachably mounted on the connecting flange. When the temperature sensor malfunctions, the operator only needs to remove the shielding tube to replace the temperature sensor separately.

[0011] By employing the above technical solution, this utility model provides a high-precision oil level sensor, which has at least the following beneficial effects:

[0012] 1. This utility model achieves dual-mode collaborative measurement by setting up a fuel level monitoring mechanism and utilizing the synergistic cooperation between the ultrasonic measurement component and the capacitance measurement component. This significantly improves the accuracy of fuel level measurement and effectively overcomes the limitations of a single sensor (such as foam interference and the influence of fuel tank shape). It is suitable for monitoring needs under complex working conditions of motorcycles.

[0013] 2. This utility model, by setting up an oil level monitoring mechanism, utilizes the cooperation between the shielding round tube and the diamond-shaped through groove to effectively reduce the contamination of the ultrasonic sensor by oil splashing and suppress the formation of foam in the oil tank, thus ensuring the accuracy of oil level measurement. Furthermore, it adopts a modular and detachable design, so there is no need to replace the entire sensor in case of failure, reducing maintenance costs. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0015] Figure 1 This is a perspective view of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the oil quantity monitoring mechanism in this utility model;

[0017] Figure 3 This is a schematic diagram of the vertical circular tube in this utility model.

[0018] In the diagram: 1. Connecting flange; 2. Electrical box; 3. Signal output harness; 4. Oil level monitoring mechanism; 401. Ultrasonic measuring component; 402. Capacitance measuring component; 403. Shielding round tube; 404. Mounting platform; 405. Temperature sensor; 406. Vertical round tube; 407. Diamond-shaped through groove. Detailed Implementation

[0019] 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.

[0020] Example 1

[0021] Existing capacitive sensors are susceptible to changes in the dielectric constant of fuel, while ultrasonic sensors may experience signal attenuation or misinterpretation in conditions such as foam, oil contamination, or complex fuel tank structures, making it difficult to balance accuracy and reliability under dynamic operating conditions. To address this technical deficiency in existing technologies, such as... Figures 1-3 As shown, this embodiment proposes a high-precision fuel level sensor, which realizes dual-mode collaborative measurement and can significantly improve the accuracy of fuel level measurement. The sensor includes a connecting flange 1, an electrical box 2 is provided at the upper end of the connecting flange 1, a signal output harness 3 is provided on the electrical box 2, and a fuel level monitoring mechanism 4 is provided at the lower end of the connecting flange 1. After the vehicle is powered on, the fuel level monitoring mechanism 4 will monitor the fuel level in the fuel tank in real time and transmit the measured data to the vehicle computer through the signal output harness 3.

[0022] Specifically, the oil level monitoring mechanism 4 includes an ultrasonic measuring component 401 and a capacitance measuring component 402 fixedly mounted on the connecting flange 1. The ultrasonic measuring component 401 includes an ultrasonic oil level sensor fixedly mounted on the lower end of the connecting flange 1. The housing of the ultrasonic oil level sensor is made of polytetrafluoroethylene (PTFE), which effectively improves the durability of the ultrasonic oil level sensor and extends its service life. The capacitance measuring component 402 includes a capacitive oil level sensor fixedly mounted on the lower end of the connecting flange 1. The two detection electrodes of this capacitive oil level sensor are composed of a round tube and a round shaft, which are concentrically arranged. A shielding round tube 403 is fitted around the ultrasonic measuring component 401. The shielding round tube 403 is detachably mounted on the connecting flange 1. When the temperature sensor 405 malfunctions, the operator... The temperature sensor 405 can be replaced individually by simply removing the shielding tube 403. An installation platform 404 is fixedly installed on the inner wall of the shielding tube 403, and the temperature sensor 405 is detachably installed on the installation platform 404. A vertical tube 406 is coaxially fixedly installed at the lower end of the shielding tube 403. The detection electrodes of the vertical tube 406 and the capacitive liquid level sensor both extend below the liquid surface. The surface of the vertical tube 406 is provided with diamond-shaped through grooves 407. Several sets of diamond-shaped through grooves 407 are equally spaced, which can reduce the amount of foam generated in the oil tank to a certain extent, thereby improving the measurement accuracy. During operation, the ultrasonic measuring component 401 and the capacitive measuring component 402 will simultaneously measure the remaining oil in the oil tank, thereby ensuring the measurement accuracy.

[0023] As can be seen from the above, when using this fuel level sensor to monitor the fuel level in the fuel tank, firstly, after the vehicle is powered on, the ultrasonic fuel level sensor will emit ultrasonic waves to the surface of the fuel and measure the time it takes for the waves to reflect back to determine the fuel level in a non-contact manner. At the same time, the capacitive liquid level sensor will perform contact detection of the fuel.

[0024] Next, the two sets of data are transmitted to the vehicle computer through signal output harness 3, and the vehicle computer performs comprehensive analysis to determine the accurate remaining fuel level. Compared with traditional single-mode sensors, the detection results are more accurate.

[0025] In addition, the temperature sensor 405 will detect the temperature inside the fuel tank in real time and transmit the measured data to the vehicle's computer in a synchronized manner. Subsequently, the vehicle's computer will automatically correct the error caused by the thermal expansion and contraction of the fuel based on the temperature.

[0026] In addition, such as Figure 1 As shown, the shielding tube 403 surrounds the outside of the ultrasonic measuring component 401. When the vehicle experiences significant bumps, the shielding tube 403 can prevent splashed oil from directly contacting the ultrasonic oil level sensor to a certain extent, thus extending the service life of the ultrasonic oil level sensor to some extent.

[0027] Furthermore, a vertical tube 406 is coaxially arranged at the lower end of the shielding tube 403, and multiple diamond-shaped through grooves 407 are opened on the surface of the vertical tube 406, which can reduce the amount of foam in the area below the sensor to a certain extent, thereby ensuring the accuracy of the measurement.

[0028] This embodiment, by setting up a fuel level monitoring mechanism 4, utilizes the coordinated operation between the ultrasonic measurement component 401 and the capacitance measurement component 402 to achieve dual-mode collaborative measurement, which can significantly improve the accuracy of fuel level measurement. Furthermore, it effectively overcomes the limitations of a single sensor (such as foam interference and the influence of fuel tank shape), making it suitable for monitoring needs under complex motorcycle operating conditions. Moreover, by setting up the fuel level monitoring mechanism 4, the interaction between the shielding circular tube 403 and the diamond-shaped through-slot 407 effectively reduces oil splash contamination of the ultrasonic sensor and suppresses foam generation in the fuel tank, thus ensuring the accuracy of fuel level measurement. Additionally, the modular and detachable design eliminates the need to replace the entire sensor in case of failure, reducing maintenance costs.

[0029] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail.

[0030] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-precision oil quantity sensor, comprising a connecting flange (1), an electric box (2) is arranged at the upper end of the connecting flange (1), a signal output wire harness (3) is arranged on the electric box (2), characterized in that: The lower end of the connecting flange (1) is provided with an oil quantity monitoring mechanism (4); The oil quantity monitoring mechanism (4) comprises an ultrasonic measurement assembly (401) and a capacitive measurement assembly (402) fixedly installed on the connecting flange (1), an outer sleeve of the ultrasonic measurement assembly (401) is provided with a shielding circular tube (403), an inner side wall of the shielding circular tube (403) is fixedly provided with a mounting platform (404), the mounting platform (404) is detachably installed with a temperature sensor (405), and a lower end of the shielding circular tube (403) is coaxially fixedly installed with a vertical circular tube (406), and a surface of the vertical circular tube (406) is provided with a rhombic through slot (407).

2. The high-precision oil amount sensor according to claim 1, characterized by: The ultrasonic measurement assembly (401) comprises an ultrasonic oil level sensor fixedly installed at the lower end of the connecting flange (1), and an outer shell of the ultrasonic oil level sensor is made of polytetrafluoroethylene material.

3. The high-precision oil amount sensor according to claim 1, characterized by: The capacitive measurement assembly (402) comprises a capacitive oil level sensor fixedly installed at the lower end of the connecting flange (1).

4. The high-precision oil amount sensor according to claim 3, characterized by: The vertical circular tube (406) and the detection electrode of the capacitive liquid level sensor both extend below the liquid surface.

5. The high-precision oil amount sensor according to claim 1, characterized by: The rhombic through slot (407) is provided with a plurality of groups at equal intervals.

6. The high-precision oil amount sensor according to claim 1, characterized by: The shielding circular tube (403) is detachably installed on the connecting flange (1).

Images