TWI775685B - Liquid fuel capacity detection device for non-metallic containers - Google Patents

Abstract

A liquid fuel capacity detection device for a non-metal container, comprising: a casing, a fulcrum part, a sensing part and a control circuit. The housing has a front side and a back side and provides an accommodating space. The fulcrum portion is protrudingly provided on the back side. The sensing part has a sensor, which is a capacitive sensor, and the sensing part at least partially protrudes from the back side. The control circuit is used to control the sensor to detect the liquid fuel capacity, and to generate a wireless report signal to the external device accordingly. When the liquid fuel capacity detection device is subjected to the force toward the side of the liquid fuel container, which is a non-metallic container, and passes through the back side and rests on the side, the back side uses the fulcrum part as the fulcrum to form a lever structure. Under the action, the sensing part protruding from the back side is abutted on the side surface.

Description

Liquid fuel capacity detection device for non-metallic containers

The present invention relates to a capacity detector, in particular to a liquid fuel capacity detection device of a non-metallic container.

For people's life or business, commercially available gas fuels such as liquefied petroleum gas (commonly known as barreled gas) that are retailed in barrels are convenient fuel sources. As gas barrels traditionally use steel cylinders, users cannot correctly grasp the remaining amount and often need to wait until they are exhausted before notifying suppliers to replace them.

In order to measure the volume of liquid fuel such as high-pressure liquefied gas fuel in a container, in addition to the traditional method of a pressure gauge, the industry has gradually developed sensors for measurement. For example, there is a hand-held gas capacity detector on the market. Using the principle of ultrasonic waves, the user holds the gas capacity detector and places it horizontally on the side of the gas barrel to find out whether there is any remaining gas in the gas barrel within a few seconds. . In addition, there are wireless gas capacity detectors on the market, which also use the principle of ultrasonic waves, and are suitable for being installed on the bottom surface of barreled gas to detect the remaining amount in the gas barrel. The above two gas volume detectors are suitable for the liquid level display of steel and aluminum liquefied petroleum gas cylinders, but not for plastic gas cylinders.

However, the hand-held gas capacity detector is suitable for the occasions that manually detect the gas barrels individually, such as confirming the remaining amount of the gas barrels before going out for outdoor activities, for the use of a large number of gas barrels or business use scenarios , can only be detected individually and cannot be automatically detected. As for the wireless gas capacity detector, it must be installed on the bottom surface of the gas barrel, so it is not easy to tell whether the gas barrel has a detector installed or not from the appearance. During installation, maintenance, and removal operations, the gas barrels need to be turned over, which causes operational difficulties and increases the time and cost required, especially for use scenarios with a large number of gas barrels, a wide distribution area, or business use. in this way.

In addition, in view of the heaviness and safety of metal gas barrels, composite bottles have been developed in the industry to replace metal gas barrels, and are used in some regions such as Europe. The composite bottle is about half the weight of the old gas barrel and is also very safe. However, ultrasonic sensors are not suitable for non-metallic gas barrels.

Therefore, the detection of gas barrels in non-metallic containers remains to be developed.

One of the objectives of the present invention is to provide a liquid fuel capacity detection device, which is suitable for detecting the remaining amount of liquid fuel in a non-metallic container.

In order to achieve at least the above object, the present invention provides a liquid fuel capacity detection device for a non-metallic container, which is used to detect the liquid fuel capacity of a liquid fuel container. The liquid fuel capacity detection device includes: a shell, a fulcrum part, a sensing part and a control circuit. The casing has a front side and a back side facing away from the front side, and provides an accommodating space. The fulcrum portion has at least one protrusion, and the fulcrum portion is protrudingly provided on the back side. The sensing portion has a sensor, the sensing portion at least partially protrudes from the back side, and the sensor is a capacitive sensor. The control circuit is disposed in the accommodating space and is electrically coupled with the sensor, and is used for controlling the sensor to detect the liquid fuel capacity and generate a wireless report signal to an external device accordingly. The liquid fuel capacity detection device is configured to detect the liquid fuel capacity of the liquid fuel container through the back side, wherein the liquid fuel container is a non-metallic container, when the liquid fuel capacity detection device is subjected to a direction toward the liquid fuel container When the force of one side of the fuel container passes through the back side and rests on the side, the back side uses the fulcrum portion as a fulcrum to form a lever structure, and the lever structure is under the action of the force toward the side. The sensing portion protruding from the back side abuts on the side surface.

In an embodiment of the present invention, the liquid fuel capacity detection device further includes a groove portion, and the groove portion is disposed on the back side.

In an embodiment of the present invention, the groove portion is disposed between the fulcrum portion and the sensing portion.

In an embodiment of the present invention, the sensing portion further has an elastic layer, and the elastic layer is used for abutting against the side surface.

In one embodiment of the present invention, the liquid fuel container is a container made of glass fiber composite.

In an embodiment of the present invention, the casing is configured to be suitable for attaching a strap to the side of the liquid fuel container.

In one embodiment of the present invention, the front side is configured to be suitable for binding a strap on the side surface of the liquid fuel container.

As above, in the embodiment of the liquid fuel capacity detection device, when the sensor is implemented by a capacitive sensor, under the action of the aforementioned lever structure, the sensor portion obtains a force action against the side surface , so that the capacitance measurement of the sensing part has good quality, that is, it can stably and accurately reflect the actual measurement result. In this way, the liquid fuel capacity detection device is more practical and accurate.

In order to fully understand the purpose, features and effects of the present invention, the present invention is described in detail by the following specific embodiments and in conjunction with the accompanying drawings, and the description is as follows:

When developing a detector installed on the side of a liquid fuel container (such as a non-metallic gas barrel), the inventor of the present application further found that if only the sensor of the capacity detector is directly placed against the side of the liquid fuel container in a plane manner , The quality of the read signal obtained by the capacity detector may be unstable or poor due to the existence of a gap between the sensor and the side or the way the sensor is against the side is not stable enough, resulting in the capacity detection The device may be misjudged. For example, when the capacitance detector is implemented as a capacitance sensor, the sensing conditions may be unstable, such as poor or unstable capacitance measurement quality.

In order to solve the problem of unstable or poor quality of the read signal obtained by the capacity detector, the inventor of the present invention has developed the liquid fuel capacity detection device of the present invention. Please refer to FIG. 1A , which is a schematic diagram of an embodiment of a liquid fuel capacity detection device. FIG. 1B is a schematic structural diagram of an embodiment of a liquid fuel capacity detection device.

As shown in FIG. 1A and FIG. 1B , the liquid fuel capacity detection device 1 is used for detecting the liquid fuel capacity of a liquid fuel container 90 . The liquid fuel capacity detection device 1 includes: a casing 10 and a fulcrum part 20 , a sensing part 30 and a control circuit 40 .

The casing 10 has a front side 11 and a back side 12 facing away from the front side 11 , and provides an accommodating space 13 .

The fulcrum portion 20 has at least one protrusion, and the fulcrum portion 20 is arranged protrudingly on the back side 12 .

The sensing portion 30 has a sensor 31 , and the sensing portion 30 at least partially protrudes from the back side 12 . In implementation, depending on the size of the sensor 31 , the sensing portion 30 may be configured to be partially disposed in the accommodating space 13 and partially protruding from the back side 12 , as shown in FIG. 1B ; however, the sensing portion 30 Implementation is not limited by this example.

The control circuit 40 is disposed in the accommodating space 13 and is electrically coupled to the sensor 31, and is used to control the sensor 31 to detect the liquid fuel capacity, and to generate a wireless report signal to the sensor 31 accordingly. external device.

As shown in FIG. 1A and FIG. 1B , the liquid fuel capacity detection device 1 is configured to detect the liquid fuel capacity of the liquid fuel container 90 through the back side 12 , wherein when the liquid fuel capacity detection device 1 receives When a force (represented by F in the figure) toward one side surface 91 of the liquid fuel container 90 passes through the back side 12 and rests on the side surface 91 , the back side 12 uses the fulcrum portion 20 as a fulcrum to form a lever Structure, the lever structure makes the sensing portion 30 protruding from the back side 12 abut against the side surface 91 under the action of the force F toward the side surface 91, so as to facilitate the detection of the liquid fuel capacity.

Therefore, the sensing conditions obtained by the liquid fuel capacity detection device 1 for detecting the liquid fuel capacity of the liquid fuel container 90 through the back side 12 are better than implementing the capacity sensor only for sensing The sensor is placed directly against the side of the container in a flat manner to sense the condition. For example, the liquid fuel in the liquid fuel container 90 may be high pressure liquid fuel, such as liquefied petroleum gas, or general liquid fuel.

In an embodiment of the liquid fuel capacity detection device 1 , if the sensor 31 is implemented by a capacitive sensor, under the action of the aforementioned lever structure, the sensing portion 30 can get close to the side surface 91 . Therefore, the capacitance measurement of the sensing portion 30 has good quality, that is, it can stably and accurately reflect the actual measurement result. In this way, the liquid fuel capacity detection device 1 is more practical and accurate.

In addition, the position of the side surface 91 of the liquid fuel container 90 corresponding to the installation position of the aforementioned sensing portion 30 will affect the judgment criterion of the remaining amount of the liquid fuel container 90 . For example, when the liquid level of the liquid fuel container 90 is higher than the position of the sensing portion 30, the liquid fuel capacity detection device 1 can be configured to send a wireless report signal to represent that the remaining amount is higher than a threshold; When the liquid level of the liquid fuel container 90 is at the position of the sensing portion 30 , the liquid fuel capacity detection device 1 can be configured to send a wireless reporting signal to represent that the remaining amount has reached the threshold. In addition, optionally, when the liquid level of the liquid fuel container 90 is lower than the position of the sensing portion 30, the liquid fuel capacity detection device 1 can be configured to send a wireless report signal to represent that the remaining amount is lower than the position of the sensing portion 30. Threshold alerts.

When the liquid fuel capacity detection device 1 is implemented based on the structure of FIG. 1 , the relative positions of the fulcrum portion 20 and the sensing portion 30 on the backside 12 can be configured according to the requirements of the threshold, so that the sensing portion protruding from the backside 12 The measuring part 30 can be close to a suitable position on the side of the liquid fuel container to be detected, so as to facilitate the detection of the liquid fuel capacity. In this way, the control circuit 40 can be correspondingly configured to appropriately send a wireless report signal according to the change of the data read by the sensor 31 to notify the external device of the state of the liquid level of the liquid fuel container or to give an alarm in time. .

In order to realize the aforementioned force F toward the side of the liquid fuel container to be detected, the liquid fuel capacity detection device 1 can be further configured with a corresponding mechanism to generate the force F toward the side, or cooperate with the outside to generate the force F toward the side institutions to achieve. The aforementioned force F toward the side is used to make the liquid fuel capacity detection device 1 rest on the side through the back side 12 , thereby forming the aforementioned lever structure to facilitate the detection of the liquid fuel capacity. In some embodiments, the aforementioned force F toward the side can be achieved by one or a combination of two or more applicable forces such as magnetic force, pulling force, adhesive force or adsorption force. Further examples will be given below.

In the following, the liquid fuel container 90 is a non-metallic container, and the sensor of the liquid fuel capacity detection device is a capacitive sensor as an example.

Please refer to FIG. 2A , which is a schematic diagram of an embodiment of the liquid fuel capacity detection device 1 based on FIG. 1 . In FIG. 2A , the liquid fuel capacity detection device 1A is an embodiment based on the structure of FIG. 1 . The back side 12A of the liquid fuel capacity detection device 1A, which faces away from the front side 11A, uses the protrusion of the fulcrum portion 20A as a fulcrum. A lever structure is formed. The lever structure makes the sensing portion 30A protruding from the back side 12A abut against the side surface 91 under the action of the force toward the side surface 91 to facilitate the detection of liquid fuel capacity.

In one embodiment, optionally, the liquid fuel capacity detection device 1A further includes a groove portion 60A, the groove portion 60A is disposed on the back side 12A, and is used to match a line on the side surface 91 . 92 to facilitate the liquid fuel capacity detection device 1 to be arranged at the position guided by the line 92 of the side surface 91 . In this embodiment, the line 92 protrudes below the side surface 91 of the liquid fuel container 90 ; alternatively, this position can be used as a position on the side surface of the liquid fuel container to be detected as a criterion for determining the remaining amount. Therefore, when installing the liquid fuel capacity detection device 1A on the side surface 91 of the liquid fuel container 90, the technicians can easily and based on the line 92 as the installation position, so that the line 92 corresponds to the groove portion 60A to complete the basic installation action.

Certainly, the implementation of the present invention is not limited by the above examples; even if the liquid fuel container 90 is not provided with lines or the lines are not protruded from the side surface 92 , it does not affect the implementation of the liquid fuel capacity detection device 1A.

Please refer to FIG. 2B , which is a schematic diagram of another embodiment of the liquid fuel capacity detection device 1 based on FIG. 1 . In FIG. 2B , the liquid fuel capacity detection device 1B is an embodiment based on the structure of FIG. 1 . Compared with the liquid fuel capacity detection device 1A of FIG. 2A , the fulcrum part 20B and the sensor of the liquid fuel capacity detection device 1B The measuring portions 30B are provided below and above the back side 12B, respectively.

Optionally, the liquid fuel capacity detection device 1B further includes a groove portion 60B, the groove portion 60B is disposed on the back side 12B facing away from the front side 11B, and is used to match the lines 92 on the side surface 91 In order to facilitate the liquid fuel capacity detection device 1B to be arranged on the position guided by the line 92 of the side surface 91 .

In some embodiments of the present invention, the groove portion (eg, 60A or 60B) is disposed between the fulcrum portion (eg, 20A or 20B) and the sensing portion (eg, 30A or 30B).

In addition, based on the structure of FIG. 1A and FIG. 1B or referring to the embodiment of FIG. 2A or FIG. 2B , in some embodiments, the liquid fuel capacity detection device can be implemented by disposing the fulcrum part and the sensing part on the back side and using various The arrangement of the upper and lower relative positions, as long as the arrangement is such that when the liquid fuel capacity detection device is subjected to the force toward the side of the liquid fuel container, which is a non-metallic container, the back side passes through the back side and rests on the side. A lever structure is formed as a fulcrum, and under the action of the force toward the side, the sensing part protruding from the back side is abutted on the side, which can be used as the realization of the liquid fuel capacity detection device.

Please refer to FIG. 3A , which is a schematic diagram of an embodiment in which the liquid fuel capacity detection device 1C based on FIG. 1 is disposed in the liquid fuel container 90 . As shown in FIG. 3A , the liquid fuel capacity detection device 1C (eg 1A or 1B) based on FIG. 1 can be attached to the side surface 91 of the liquid fuel container 90 by, for example, adhesion or adsorption or other suitable methods, so as to make the liquid fuel The fuel capacity detection device 1C is forced toward the side 91 to facilitate the detection of the liquid fuel capacity.

In some embodiments, an external mechanism may be utilized to generate a force toward the side of the liquid fuel container and apply the liquid fuel capacity detection device based on FIG. 1 . Please refer to FIG. 3B , which is a schematic diagram of another embodiment of the liquid fuel capacity detection device 1D disposed in the liquid fuel container 90 based on FIG. 1 . As shown in FIG. 3B , the liquid fuel capacity detection device 1D (eg, 1 , 1A or 1B) based on FIG. 1 can be bound on the side surface 91 of the liquid fuel container 90 through the strap 100 . The force toward the side of the liquid fuel container is generated by the pulling force of the strap 100 and applied to the detection device 1D based on the liquid fuel capacity.

Optionally, when the liquid fuel capacity detection device is implemented based on FIG. 1, one or a combination of two or more of various applicable forces such as adhesive force or adsorption force can be further or simultaneously used to realize the liquid fuel. The force on the side 91 of the container 90 is applied to the liquid fuel capacity detection device (eg 1C or 1D).

FIG. 3C is a schematic diagram of yet another embodiment of the liquid fuel capacity detection device based on FIG. 1 . As shown in FIG. 3C , the liquid fuel capacity detection device 1E based on FIG. 1 may be further configured with a mechanism (such as a ring; or other suitable structures such as hooks, grooves, etc.) to match the strap, so as to facilitate the detection of the liquid fuel capacity The device 1E is tied to the side surface 91 .

In some embodiments, when implementing the liquid fuel capacity detection device (eg, 1, 1A, 1B, 1C, 1D, 1E) based on FIG. 1 , various methods such as tenon, sticking, suction cup and other joining methods can be used. One or a combination of two or more to achieve the force toward the side 91 of the liquid fuel container 90 and apply the liquid fuel capacity detection device. Optionally, the embodiments of the aforementioned liquid fuel capacity detection device (such as 1, 1A, 1B, 1C or 1D) can also be changed or used simultaneously with one or both of other methods such as tenon, sticking, suction cup, etc. The combination of the above achieves a force towards the side 91 of the liquid fuel container 90 . For example, when the liquid fuel capacity detection device is implemented based on FIG. 1 , a joint portion may be provided on the back side thereof, and the joint portion may include at least one of a tenon, a sticking area, or a suction cup. In some embodiments, corresponding concave and convex components may be implemented respectively on the back side of the liquid fuel capacity detection device based on FIG. 1 and the side surface 91 of the liquid fuel container 90 , so as to realize the tenon.

In one embodiment, the sensing portion (eg 30 , 30A or 30B) of the liquid fuel capacity detection device based on FIG. 1 may further have an elastic layer, when the sensing portion is close to the side (eg 91 ) When the elastic layer is used to facilitate the detection of the liquid fuel capacity. Please refer to FIG. 4 , which is a schematic diagram of an embodiment of the backside of the liquid fuel capacity detection device based on FIG. 1 . As shown in FIG. 4 , the liquid fuel capacity detection device 1F is based on the liquid fuel capacity detection device 1A of FIG. 2A , and an elastic layer 32F is exposed at the exposed position of the sensing portion protruding from the back side of the liquid fuel capacity detection device 1F. The elastic layer 32F is, for example, an elastic sheet made of silicon rubber, which can improve frictional force, so that the sensing portion and the side surface of the liquid fuel container have a better bonding effect. For example, when the sensor of the sensing portion is a capacitive sensor, the elastic layer 32F can improve the effect of capacitive sensing, and then cooperate with the lever structure on the backside of the liquid fuel capacity detection device based on FIG. 1 (such as With the fulcrum portion 20F), the effect of enhancing the detection of the liquid fuel capacity can be obtained.

In another embodiment, the sensing portion (eg, 30 , 30A or 30B) of the liquid fuel capacity detection device based on FIG. 1 can also use an adhesive to enhance the capacitive sensing effect. For example, when installing the liquid fuel capacity detection device, the sensing portion or the side surface of the liquid fuel container is coated with adhesive, and the sensing portion is joined to the side surface. In some embodiments, the aforementioned elastic layer and adhesive can also be used together.

In some embodiments, the control circuit (40 in FIG. 1 ) based on the liquid fuel capacity detection device in FIG. 1 is used to generate the wireless report signal to an external device through various wireless communication methods, such as using Bluetooth, ZigBee , NBIoT, LoRA, SigFox, CAT-M1, LTE, 4G, 5G or WiFi and other communication standards. For example, the external device can be configured as a mobile device, personal or notebook computer, server, base station or gateway and other computing devices with wireless communication functions, after receiving the wireless report signal, it can further data processing for various applications based on detected capacity data. For example, liquid fuel suppliers can notify users that new liquid fuels (such as gas and petroleum gas) can be distributed based on the detected capacity data, or users can The device or computing device knows whether the liquid fuel has reached a threshold of consumption.

FIG. 5 is a circuit block diagram of an embodiment of the liquid fuel capacity detection device based on FIG. 1 . As shown in FIG. 5 , the control circuit 500 based on the liquid fuel capacity detection device of FIG. 1 includes: a control module 510 and a wireless communication module 520 . The control module 510 is electrically coupled to the sensor 31 and used to control the sensor 31 to detect the liquid fuel capacity. The wireless communication module 520 is electrically coupled to the sensor 31 and generates the wireless reporting signal to an external device according to the liquid fuel capacity detection. The control circuit 500 can be implemented using one or more circuits, such as microcontrollers, processors, or digital signal processors, and can be based on the use of a field programmable gate array (FPGA), or a specific product It can be implemented by one or more circuits such as an application specific integrated circuit (ASIC) or a complex programmable logic device (CPLD), or it can also be implemented by using a dedicated circuit or module. The wireless communication module 520 can be implemented by a communication circuit or chip supporting at least one or more communication standards such as Bluetooth, ZigBee, NBIoT, LoRA, SigFox, CAT-M1, LTE, 4G, 5G or WiFi. In addition, the control module 510 and the wireless communication module 520 can also be implemented with a single chip.

In addition, the control circuit 500 may further include an interface module 530 , and the interface module 530 is electrically coupled to the control module 510 . Please refer to FIG. 6 , which is a schematic diagram of an embodiment of the front side of the liquid fuel capacity detection device based on FIG. 1 . In FIG. 6 , for example, an interface module 530 , such as buttons 600 , display lights (eg, LEDs) 610 , can be provided on the front side of the liquid fuel capacity detection device based on FIG. 1 as an interface for interacting with the user. For example, the liquid fuel capacity detection device can be configured to start and initialize the liquid fuel capacity detection device after pressing the button 600, and perform preliminary detection. The liquid fuel capacity detection device uses the indicator light 610 to glow green to indicate that it is normal and starts to operate; if the detection result is abnormal or cannot communicate with the external device wirelessly, the liquid fuel capacity detection device displays the red light of the indicator light 610 to indicate abnormality as a warning.

In addition, about the above-mentioned fulcrum part, another example is mentioned as follows.

Please refer to FIGS. 7A to 7D , which are schematic diagrams of some embodiments of the fulcrum portion of the liquid fuel capacity detection device based on FIG. 1 .

As shown in FIG. 7A , the illustrated fulcrum portion has a protrusion and can be configured to have a curvature to fit the side surface 91 of the liquid fuel container 90 .

As shown in FIG. 7B , the illustrated fulcrum portion has two protrusions, and can be configured to have a curvature to fit the side surface 91 of the liquid fuel container 90 .

As shown in FIG. 7C , the illustrated fulcrum portion has three protrusions, and can be configured to be arranged on a curved surface to match the side surface 91 of the liquid fuel container 90 .

As shown in FIG. 7D , the illustrated fulcrum portion has two protrusions, which can be arranged on the left and right sides of the curved surface to match the side surface 91 of the liquid fuel container 90 .

In addition, in some embodiments, the plurality of protrusions of the fulcrum portion can also be configured to be arranged on a flat surface, and the outwardly facing surface of the protrusions has an oblique angle or an arc to match the side surface of the liquid fuel container 90 .

In some embodiments of the present invention, the liquid fuel capacity detection device based on FIG. 1 can be configured to be suitable for various applicable liquid fuel containers, such as non-metallic liquefied petroleum gas gas drums, such as containers made of glass fiber composites. or other suitable containers made of non-metallic materials.

As described above, in the embodiment of the liquid fuel capacity detection device, when the sensor is implemented as a capacitive sensor, under the action of the aforementioned lever structure, the sensing portion obtains a force abutting on the side surface As a result, the capacitance measurement of the sensing portion has good quality, that is, it can stably and accurately reflect the actual measurement result. In this way, the liquid fuel capacity detection device is more practical and accurate.

In addition, the embodiment of the liquid fuel capacity detection device based on FIG. 1 is convenient to be installed in various applicable liquid fuel containers, such as liquefied petroleum gas gas barrels. The liquid fuel capacity detection device can grasp the remaining amount in the gas barrel so as to know the replacement time and reduce the residual waste. This is especially true for users of larger-capacity gas barrels that weigh gas. In addition, the above-mentioned liquid fuel capacity detection device can further promote the monitoring of the remaining amount of the user by the network and cloud system, and the effect of timely reminding the user and managing the delivery.

The present invention has been disclosed above with preferred embodiments, but those skilled in the art should understand that the embodiments are only used to describe the present invention, and should not be construed as limiting the scope of the present invention. It should be noted that all the equivalent changes and substitutions to these embodiments should be considered to be included within the scope of the present invention. Therefore, the protection scope of the present invention should be defined by the scope of the patent application.

1. 1A~1F: liquid fuel capacity detection device 10: Shell 11, 11A, 11B: Front side 12, 12A, 12B: back side 13: accommodating space 20, 20A, 20B, 20F: fulcrum part 30, 30A, 30B: Sensing part 31: Sensor 32F: Elastic layer 40: Control circuit 60A, 60B: groove part 90: Liquid fuel container 91: Side 92: Lines 100: Strap 500: Control circuit 510: Control Module 520: Wireless communication module 530: Interface Module 600: button 610: Display light F: Force towards the side

FIG. 1A is a schematic diagram of an embodiment of a liquid fuel capacity detection device. FIG. 1B is a schematic structural diagram of an embodiment of a liquid fuel capacity detection device. FIG. 2A is a schematic diagram of an embodiment of the liquid fuel capacity detection device based on FIG. 1 . FIG. 2B is a schematic diagram of another embodiment of the liquid fuel capacity detection device based on FIG. 1 . FIG. 3A is a schematic diagram of an embodiment of the liquid fuel capacity detection device based on FIG. 1 disposed in a liquid fuel container. FIG. 3B is a schematic diagram of another embodiment of the liquid fuel capacity detection device based on FIG. 1 disposed in a liquid fuel container. FIG. 3C is a schematic diagram of yet another embodiment of the liquid fuel capacity detection device based on FIG. 1 . FIG. 4 is a schematic diagram of an embodiment of the back side of the liquid fuel capacity detection device based on FIG. 1 . FIG. 5 is a circuit block diagram of an embodiment of the liquid fuel capacity detection device based on FIG. 1 . FIG. 6 is a schematic diagram of an embodiment of the front side of the liquid fuel capacity detection device based on FIG. 1 . FIG. 7A is a schematic diagram of an embodiment of a fulcrum portion of the liquid fuel capacity detection device based on FIG. 1 . 7B is a schematic diagram of an embodiment of a fulcrum portion of the liquid fuel capacity detection device based on FIG. 1 . 7C is a schematic diagram of an embodiment of a fulcrum portion of the liquid fuel capacity detection device based on FIG. 1 . 7D is a schematic diagram of an embodiment of a fulcrum portion of the liquid fuel capacity detection device based on FIG. 1 .

1: Liquid fuel capacity detection device

10: Shell

11: Front side

12: Dorsal side

13: accommodating space

20: Fulcrum

30: Sensing part

31: Sensor

40: Control circuit

90: Liquid fuel container

91: Side

F: Force towards the side

Claims (8)

A liquid fuel capacity detection device of a non-metallic container is used to detect the liquid fuel capacity of a liquid fuel container, and the liquid fuel capacity detection device comprises: a casing, which has a front side and a back side facing away from the front side, and provides an accommodating space; a fulcrum portion having at least one protrusion, the fulcrum portion being protrudingly disposed on the back side; a sensing portion having a sensor, the sensing portion at least partially protrudes from the back side, and the sensor is a capacitive sensor; a control circuit, disposed in the accommodating space and electrically coupled to the sensor, for controlling the sensor to perform liquid fuel volume detection, and to generate a wireless report signal to an external device accordingly; The liquid fuel capacity detection device is configured to detect the liquid fuel capacity of the liquid fuel container through the back side, wherein the liquid fuel container is a non-metallic container, when the liquid fuel capacity detection device is subjected to a direction toward the liquid fuel container When the force of one side of the liquid fuel container passes through the back side and rests on the side, the back side uses the fulcrum portion as a fulcrum to form a lever structure, and the lever structure is under the action of the force toward the side. The sensing portion protruding from the back side is abutted on the side surface. The liquid fuel capacity detection device as claimed in claim 1, wherein the liquid fuel capacity detection device further comprises a groove portion, and the groove portion is disposed on the back side. The liquid fuel capacity detection device according to claim 2, wherein the groove portion is disposed between the fulcrum portion and the sensing portion. The liquid fuel capacity detection device according to claim 1, wherein the sensing portion further has an elastic layer, and the elastic layer is used for abutting against the side surface. The liquid fuel capacity detection device as claimed in claim 1, wherein the casing is configured to be suitable for tying a strap to the side of the liquid fuel container. The liquid fuel capacity detection device of claim 5, wherein the front side is configured to be suitable for binding the strap on the side surface of the liquid fuel container. The liquid fuel capacity detection device as claimed in claim 1, wherein the liquid fuel container is a container made of glass fiber composite. The liquid fuel capacity detection device as claimed in claim 1, wherein the control circuit is configured to generate the wireless report signal to the communication via Bluetooth, ZigBee, NBIoT, LoRA, SigFox, CAT-M1, LTE, 4G, 5G or WiFi. external device.

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