A counter-ohmic electronic oil level sensor

Abstract

The utility model relates to oil level sensor technical field discloses a kind of reverse resistance type electronic oil level sensor, including electronic sensor body, the electronic sensor body includes stainless steel non-magnetic tube, stainless steel thread, float ball and AMP-2P insert;The float ball is 22×20 column type magnet NBR float ball, can float with oil level change;The electronic sensor body sensor outlet length is 460mm, connection with external circuit is realized by the AMP-2P insert, and installation is carried out using the stainless steel thread.The utility model in the present application, the sensor solves the problem of large detection blind area and insufficient precision of the bottom of the old positive resistance output sensor, adopts 190 ohm-0 ohm reverse resistance type output mode, greatly reduces the detection blind area, so as to adapt to the scene of high oil level precision requirement, such as aviation fuel monitoring, precision mechanical equipment lubricating oil level detection, small diesel generator set diesel oil level detection, effectively avoid the equipment failure or security risk caused by oil level misjudgment, ensure the stable operation of equipment.

Description

Technical Field

[0001] This utility model relates to the field of oil level sensor technology, and in particular to an anti-resistive electronic oil level sensor. Background Technology

[0002] In the field of oil level monitoring, electronic oil level sensors are key components for acquiring real-time oil level data and ensuring the safe and stable operation of equipment. They are widely used in various scenarios such as aviation fuel monitoring, lubricating oil level detection in precision machinery equipment, and diesel level detection in small diesel generator sets. These scenarios have extremely high requirements for the accuracy of oil level measurement, especially the detection data under low liquid level conditions, which directly relates to whether the equipment can be replenished with oil in time, whether there is a risk of idling damage, and even affects the operational safety of special scenarios such as aviation.

[0003] Currently, most mainstream older electronic oil level sensors on the market use a 0-190 ohm forward resistance output method. This technical solution has significant limitations in terms of detection blind zone and low liquid level measurement accuracy. Due to the limitations of the circuit design and sensing mechanism of the forward resistance output, the bottom detection blind zone of the older sensors is relatively large, and it is impossible to form an effective monitoring coverage of the low liquid level area near the bottom of the sensor. Especially in low liquid level scenarios where the oil level is below 15%, the sensor has difficulty accurately capturing subtle changes in the oil level, the measurement error increases significantly, and it cannot output a stable resistance signal that matches the actual oil level. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a reverse resistance electronic oil level sensor, which aims to improve the existing electronic oil level sensors. Due to the limitations of the forward resistance output method, the bottom detection blind zone is large, especially in low liquid level scenarios below 15%, which makes it impossible to accurately capture oil level changes and easily leads to oil level misjudgment, which in turn causes equipment failure or safety hazards.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a reverse resistance electronic oil level sensor, comprising an electronic sensor body, the electronic sensor body comprising a stainless steel non-magnetic tube, stainless steel threads, a float, and an AMP-2P plug-in; the float is a 22×20 cylindrical magnetic NBR float, capable of floating with changes in oil level; the sensor cable length of the electronic sensor body is 460mm, and it is connected to an external circuit through the AMP-2P plug-in, and is installed using the stainless steel threads.

[0006] Furthermore, the electronic sensor body adopts a 190-ohm to 0-ohm reverse resistance output.

[0007] Furthermore, the float is slidably connected inside a stainless steel non-magnetic tube, and the stainless steel thread is made of stainless steel, enabling it to be threadedly connected to the equipment installation interface.

[0008] Furthermore, the float is magnetic and can float in the oil with the oil level.

[0009] Furthermore, the electronic sensor body has laser-engraved lettering on its hexagonal sides.

[0010] Furthermore, the working medium of the electronic sensor body includes diesel, gasoline, engine oil, and lubricating oil.

[0011] This utility model has the following beneficial effects:

[0012] In this invention, the sensor solves the problems of large detection blind zone and insufficient accuracy at the bottom of the old positive resistance output sensor. It adopts a 190 ohm-0 ohm reverse resistance output method, which greatly reduces the detection blind zone. This makes it suitable for scenarios with high requirements for oil level accuracy, such as aviation fuel monitoring, lubricating oil level detection of precision mechanical equipment, and diesel oil level detection of small diesel generator sets. It effectively avoids equipment failure or safety hazards caused by misjudgment of oil level and ensures stable operation of equipment. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the main structure of a reverse-resistive electronic oil level sensor proposed in this utility model;

[0014] Figure 2 This is a schematic diagram of the AMP-2P plug-in structure of an anti-resistive electronic oil level sensor proposed in this utility model.

[0015] Figure 3 This is a schematic diagram of the exploded AMP-2P plug-in of the anti-resistive electronic oil level sensor proposed in this utility model.

[0016] Figure 4 This is a front view of the main body AMP-2P plug-in of the anti-resistive electronic oil level sensor proposed in this utility model;

[0017] Figure 5 The circuit diagram is for an anti-resistive electronic oil level sensor proposed in this 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] Reference Figure 1 and Figure 2This utility model provides an embodiment of a reverse-resistance electronic oil level sensor, comprising an electronic sensor body, which includes a stainless steel non-magnetic tube, stainless steel threads, a float, and an AMP-2P plug-in; the float is a 22×20 cylindrical magnetic NBR float that can float with changes in oil level; the sensor cable length of the electronic sensor body is 460mm, and it is connected to an external circuit through the AMP-2P plug-in, and is installed using the stainless steel threads;

[0020] Specifically, this anti-resistance electronic oil level sensor achieves accurate oil level detection by combining anti-resistance output with mechanical linkage sensing. The main body of the electronic sensor is made of 304 stainless steel non-magnetic tubing. This material not only provides stable installation and movement space for internal components and the float, but also effectively isolates external environmental interference, ensuring the stable operation of the internal sensing mechanism. In addition, the sensor is connected to the equipment mounting interface via stainless steel threads. This design ensures that the sensor will not loosen during operation, providing a reliable fixed reference for oil level detection.

[0021] When this sensor senses the oil level and outputs a signal, it is achieved through the movement of a 22×20 cylindrical magnetic NBR float. This float has good buoyancy and magnetism, and can float sensitively with the rise and fall of the oil level. When the oil level changes, the float drives the sliding rheostat inside the sensor to shift its position through magnetism, thereby changing the circuit resistance value and achieving a reverse resistance linear output of 190 ohms to 0 ohms. When the oil level is high, the float is at a higher position, and the corresponding resistance value is 0 ohms; conversely, when the oil level drops, the float sinks with the oil level, and the resistance value of the sliding rheostat gradually increases from 0 ohms until it reaches 190 ohms when the oil level is low. Thus, the rise and fall of the oil level can be accurately mapped through the linear change of the resistance value.

[0022] The sensor's cable length is set at 460mm, and its AMP-2P connector at the end can directly interface with external detection equipment or control systems, ensuring stable transmission of the resistance signal to the external terminal. This allows users to easily obtain real-time oil level information through resistance value conversion. Furthermore, the sensor's installation method, threaded interface, and installation dimensions are consistent with the older sensor using a 0-190 ohm forward resistance output, allowing for direct replacement. This not only ensures continuity of detection functionality but also achieves efficient compatibility with existing equipment. In addition, the sensor has a rated power of 125mW, a maximum operating current of 300mA, an operating temperature range of -40℃ to 85℃, and an IP65 protection rating. These electrical parameters and protective measures ensure that the float floats smoothly and without jamming in various media environments such as diesel, gasoline, engine oil, and lubricating oil, while maintaining a stable resistance signal output with an error controlled within ±(R×1.5%+1Ω), providing reliable assurance for oil level detection.

[0023] Working principle: This anti-resistance electronic oil level sensor uses anti-resistance output in conjunction with mechanical linkage sensing to achieve accurate oil level detection. The sensor uses a 304 stainless steel non-magnetic tube as the main frame of the sensor, providing stable installation and movement space for internal components and float, while isolating external environmental interference and ensuring stable operation of the internal sensing mechanism. Furthermore, it uses stainless steel threads to tightly connect with the equipment installation interface through threaded engagement, ensuring that the sensor does not loosen during operation and providing a fixed reference for oil level detection.

[0024] When this sensor senses the oil level and outputs a signal, it is achieved through the movement of a 22×20 cylindrical magnetic NBR float. This float has good buoyancy and magnetism, and can float sensitively with the rise and fall of the oil level. When the oil level changes, the float drives the sliding rheostat inside the sensor to shift its position through magnetism, thereby changing the circuit resistance value and achieving a reverse resistance linear output of 190 ohms to 0 ohms. When the oil level is high, the float is at a higher position, and the corresponding resistance value is 0 ohms; conversely, when the oil level drops, the float sinks with the oil level, and the resistance value of the sliding rheostat gradually increases from 0 ohms until it reaches 190 ohms when the oil level is low. Thus, the rise and fall of the oil level can be accurately mapped through the linear change of the resistance value.

[0025] The sensor has a 460mm cable length, and the AMP-2P connector at the end can directly interface with external detection equipment or control systems to stably transmit the resistance signal to the external terminal, allowing users to calculate the real-time oil level using the resistance value. Furthermore, its installation method, threaded interface, and installation dimensions are completely consistent with the older sensor that uses a 0-190 ohm forward resistance output, making it a viable replacement. This ensures efficient compatibility with existing equipment while maintaining detection functionality. In addition, the sensor has electrical parameters including a rated power of 125mW, a maximum operating current of 300mA, an operating temperature range of -40℃ to 85℃, and an IP65 protection rating, ensuring smooth and uninterrupted float movement in various media environments such as diesel, gasoline, engine oil, and lubricating oil. The stable resistance signal output with an error controlled within ±(R×1.5%+1Ω) provides reliable assurance for oil level detection.

[0026] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing 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. 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. A counter- resistive electronic oil level sensor comprising an electronic sensor body, characterized in that: The electronic sensor body includes a stainless steel non-magnetic tube, stainless steel threads, a float, and an AMP-2P plug-in; the float is a 22×20 cylindrical magnetic NBR float that can float with changes in oil level; the sensor cable length of the electronic sensor body is 460mm, and it is connected to an external circuit through the AMP-2P plug-in, and is installed using the stainless steel threads.

2. The anti-resistive electronic oil level sensor according to claim 1, characterized in that: The electronic sensor body adopts a 190-ohm to 0-ohm reverse resistance output.

3. A counter-ohmic electronic oil level sensor according to claim 1, characterized in that: The float is slidably connected inside a stainless steel non-magnetic tube, and the stainless steel thread is made of stainless steel and can be threaded to the equipment installation interface.

4. A counter-ohmmeter electronic oil level sensor according to claim 1, characterized in that: The float is magnetic and can float in the oil with the oil level.

5. A counter-ohmic electronic oil level sensor according to claim 1, characterized in that: The electronic sensor body has laser-engraved lettering on its hexagonal sides.

6. The anti-resistive electronic oil level sensor according to claim 1, characterized in that: The working medium of the electronic sensor body includes diesel, gasoline, engine oil, and lubricating oil.

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