A filler pipe connection state detection device and detection system

Abstract

This invention relates to the field of fuel refueling, specifically to a refueling pipe connection status detection device and system. The detection device includes a data processing system, an induced current generating mechanism, and a current detection mechanism; the current detection mechanism and the induced current generating mechanism are spaced apart; both the induced current generating mechanism and the current detection mechanism have channels through which the refueling pipe passes. This invention utilizes the principle of electromagnetic induction. When a conductive refueling pipe simultaneously passes through both the induced current generating mechanism and the current detection mechanism, forming a closed loop, the data processing system induces a current in the refueling pipe through the induced current generating mechanism. This induced current generates a magnetic field change in the current detection mechanism, thus generating another induced current, which is fed back to the data processing system. If the refueling pipe disconnects, the closed loop is broken, and the induced current disappears. The current detection mechanism detects the presence of an induced current on the refueling pipe, thereby determining the connection status of the refueling pipe.

Description

Technical Field

[0001] This invention relates to the field of fuel refueling, and more specifically to a refueling pipe connection status detection device and detection system. Background Technology

[0002] When refueling a vehicle, a refueling hose is typically used to connect the refueling equipment and the equipment being refueled. If the equipment being refueled shifts for any reason, causing the refueling hose to be pulled off, a fuel leak may occur, posing a risk of an accident. Summary of the Invention

[0003] In view of this, the present invention provides a device and system for detecting the connection status of a filling tube, which aims to detect the connection status of a filling tube with conductive properties and determine whether the filling tube has fallen off.

[0004] To solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0005] A device for detecting the connection status of a filling tube is provided for detecting the connection status of a conductive filling tube. The detection device includes: at least one induced current generating mechanism for generating an induced current in the filling tube in a closed loop; at least one current detection mechanism, spaced apart from the induced current generating mechanism, for detecting whether an induced current is generated on the filling tube; and a data processing system electrically connected to the induced current generating mechanism and the current detection mechanism, respectively, for controlling the induced current generating mechanism to generate the induced current, receiving and processing the data signal corresponding to the induced current detected by the current detection mechanism; both the induced current generating mechanism and the current detection mechanism have a channel through which the filling tube passes.

[0006] In some embodiments, the detection device further includes a housing and a cover plate; the housing has a cavity; the induced current generating mechanism, the current detection mechanism and the data processing system are all located in the cavity within the housing; the cover plate is used to seal the cavity of the housing; both the housing and the cover plate are provided with channels for the filling tube to pass through.

[0007] In some embodiments, the housing includes a first housing portion and a second housing portion; the first housing portion and the second housing portion are detachably connected; the first housing portion and the second housing portion wrap around both sides of the filling tube; each of the first housing portion and the second housing portion has a cavity; the cover plate includes a first cover plate portion and a second cover plate portion; the first cover plate portion is used to cover the cavity of the first housing portion; the second cover plate portion is used to cover the cavity of the second housing portion; the induced current generating mechanism includes a first induced current generating part and a second induced current generating part; the current detection mechanism includes a first current detection part and a second current detection part; both the first induced current generating part and the first current detection part are disposed in the cavity of the first housing portion; both the second induced current generating part and the second current detection part are disposed in the cavity of the second housing portion; the data processing system is disposed in the cavity of the first housing portion or the second housing portion.

[0008] In some embodiments, the detection device further includes a mounting bracket; the mounting bracket is attached to the outer wall of the housing.

[0009] In some embodiments, a barrier is provided between the induced current generating mechanism and the current sensing mechanism to prevent mutual interference between them.

[0010] In some embodiments, the induced current generating mechanism includes an excitation magnetic ring and an excitation coil, with the excitation coil wound around the excitation magnetic ring; the current detection mechanism includes an induction magnetic ring and an induction coil, with the induction coil wound around the induction magnetic ring; and the blocking element is a magnetic shielding pad.

[0011] In some implementations, the positional relationship between the current generating mechanism and the current sensing mechanism is stacked, parallel and offset, or at an angle to each other.

[0012] The present invention also provides a filling tube connection status detection system for detecting the connection status of a filling tube with conductivity. The system includes: an induced current generating circuit for generating an induced current in the filling tube in a closed loop; and a current detection circuit for detecting whether an induced current is generated on the filling tube. If an induced current is detected on the filling tube, the filling tube is considered to be in a connected state; if no induced current is detected on the filling tube, the filling tube is considered to be in a disconnected state.

[0013] In some embodiments, the induced current generating circuit includes a pulse generating circuit, an excitation circuit, and an excitation coil electrically connected in sequence; the pulse generating circuit is used to generate a specific pulse signal; the excitation circuit is used to amplify the pulse signal and apply it to the excitation coil; the excitation coil is used to generate an excitation current and apply it to the filling tube in a closed loop to generate an induced current.

[0014] In some embodiments, the current detection circuit includes a detection coil, a signal processing circuit, a discrimination circuit, a monostable circuit, a timing circuit, and a buffer circuit connected in sequence. The detection coil is used to detect whether there is an induced current on the filling tube. If an induced current is detected, a detection signal is output. The signal processing circuit is used to amplify and filter the detection signal to obtain a processed signal. The discrimination circuit is used to identify a feature signal from the processed signal and to discriminate the amplitude of the feature signal to obtain a valid identification signal. The monostable circuit is used to convert the valid identification signal into a pulse signal with a fixed pulse width. The timing circuit is used to monitor the pulse signal and, within a timing period, to provide a corresponding indication signal based on whether the monostable circuit generates a pulse signal. The buffer circuit is used to process the indication signal into a signal that can be directly applied to the external interface.

[0015] In summary, compared with the prior art, the present invention has the following advantages and beneficial effects: The present invention utilizes the principle of electromagnetic induction. When a conductive filling tube simultaneously passes through the induced current generating mechanism and the current detection mechanism to form a closed loop, the data processing system controls the induced current generating mechanism to induce a current in the filling tube within the loop. This induced current generates a magnetic field change in the current detection mechanism, causing the current detection mechanism to generate another induced current, which is then fed back to the data processing system. If the filling tube is disconnected for any reason, the closed loop is broken, and the induced current disappears. The current detection mechanism detects whether there is an induced current on the filling tube, thereby determining the connection status of the filling tube. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the detection device described in Embodiment 1 of the present invention.

[0017] Figure 2 This is a schematic diagram of the structure of the detection device described in Embodiment 1 of the present invention after it has been installed on the refueling equipment.

[0018] Figure 3 This is a schematic diagram of the connection structure between the detection device and the filling tube according to Embodiment 1 of the present invention.

[0019] Figure 4 This is a schematic diagram showing the positional relationship between the induced current generating mechanism and the current detection mechanism in the detection device described in Embodiment 1 of the present invention.

[0020] Figure 5 This is a schematic diagram showing another positional relationship between the induced current generating mechanism and the current detection mechanism in the detection device described in Embodiment 1 of the present invention.

[0021] Figure 6 This is a schematic diagram showing another possible positional relationship between the induced current generating mechanism and the current detection mechanism in the detection device described in Embodiment 1 of the present invention.

[0022] Figure 7 This is a schematic diagram of the structure of the detection device described in Embodiment 2 of the present invention after it has been installed on the refueling equipment.

[0023] Figure 8 for Figure 7 A magnified structural diagram of region A in the middle.

[0024] Figure 9 This is a cross-sectional view of the first detection unit in the detection device according to Embodiment 2 of the present invention.

[0025] Figure 10 This is a cross-sectional view of the second detection unit in the detection device according to Embodiment 2 of the present invention.

[0026] Figure 11 This is a schematic diagram of the detection system described in this invention.

[0027] The labels in the diagram are as follows: Detection device 10, data processing system 11, induced current generating mechanism 12, through hole 13, current detection mechanism 14, housing 15, cover plate 16, barrier 17, fixing bracket 18, cable 19, filling device 21, filling pipe 22, grounding clamp 23, first detection unit 100, first housing unit 151, first cover plate unit 161, first induced current generating unit 121, first current detection unit 141, first barrier 171, second detection unit 200, second housing unit 152, second cover plate unit 162, second induced current generating unit 122, second current detection unit 142, second barrier 172, induced current generating circuit 30, pulse generating circuit 31, excitation circuit 32, excitation coil 33, current detection circuit 40, detection coil 41, signal processing circuit 42, discrimination circuit 43, monostable circuit 44, timing circuit 45, buffer circuit 46. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to specific embodiments.

[0029] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 limiting this invention.

[0030] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the stated number, while "above," "below," "within," etc. are understood to include the stated number. If terms such as "first," "second," etc., are used only to distinguish technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0031] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0032] Let's take a concrete example to illustrate how a detached refueling hose can lead to a fuel leak. For instance, natural gas vehicles use compressed natural gas (CNG) as fuel. CNG has been promoted due to its higher energy efficiency and lower emissions. The main characteristics of CNG are its flammability, explosiveness, and rapid spread, especially under high pressure. If a leak occurs and encounters a source of ignition, it can cause personal safety issues and economic losses. Therefore, the safety of CNG refueling equipment is of paramount importance.

[0033] The refueling hose is the weakest link in the complete refueling system. During the refueling process, the vehicle may shift for some reason, causing the refueling hose to be pulled off, which could lead to a CNG leak.

[0034] Traditional methods for preventing and handling refueling hose detachment involve mechanical break-off valves, but these are relatively slow to respond. It is necessary to use faster-responding electronic detection devices to monitor the refueling hose connection status in real time and provide timely alarm information when hose detachment occurs. This allows the refueling control system to take appropriate emergency measures (such as cutting off the gas supply) to ensure the safety of the refueling process.

[0035] Example 1

[0036] like Figure 1 As shown in the embodiment of this application, a filling pipe connection status detection device 10 includes a data processing system 11, at least one induced current generating mechanism 12, and at least one current detection mechanism 14.

[0037] The induced current generating mechanism 12 is used to generate an induced current in the filling tube 22, which is in a closed loop. The induced current generating mechanism 12 has a channel through which the filling tube 22 passes. To obtain the induced current, the filling tube 22 needs to be conductive and have a channel passing through it. For example, a metal braided strip can be wrapped around the outside of the filling tube 22 to form a braided tube, allowing the metal braided strip to conduct current. The induced current generating mechanism 12 can also be constructed by winding enameled wire as an excitation coil around an excitation magnetic ring. Upon receiving an AC signal, it generates an excitation magnetic field, thereby generating an alternating induced current in the filling tube 22, which passes through the magnetic field and is in a closed loop.

[0038] Correspondingly, the current detection mechanism 14 is used to detect whether there is an induced current on the filling tube 22. The current detection mechanism 14 also has a channel for the filling tube 22 to pass through. The current detection mechanism 14 can be made by winding enameled wire as an induction coil around an induction magnetic ring. When the filling tube 22, which is in a closed loop and carries an alternating induced current, passes through the induction magnetic ring, another induced current will be generated in the induction coil on the induction magnetic ring.

[0039] The induced current generating mechanism 12 and the current detection mechanism 14 can be made of materials that easily generate magnetic fields or easily induce currents, such as silicon steel sheets, in addition to magnetic rings wound with enameled wire.

[0040] The data processing system 11 is electrically connected to the induced current generating mechanism 12 on one hand to control the induced current generating mechanism 12 to generate induced current; on the other hand, it is electrically connected to the current detection mechanism 14 to receive and process the data signal corresponding to the induced current on the filling tube 22 detected by the current detection mechanism 14. The data processing system 11 can be a collection device composed of multiple circuit boards for implementing instruction output, information acquisition and data processing, such as ECU (Electronic Control Unit), PLC (Programmable Logic Controller), microcontroller, etc.

[0041] When there are two or more induced current generating mechanisms 12 and current detection mechanisms 14, the induced current generating mechanisms 12 and current detection mechanisms 14 can be distributed in different positions of the filling tube 22. In this way, each induced current generating mechanism 12 / current detection mechanism 14 can not only serve as a backup for each other, but also be calibrated when one of the induced current generating mechanisms 12 / current detection mechanisms 14 fails to detect accurately.

[0042] The induced current generating mechanism 12 and the current sensing mechanism 14 need to be spaced apart to avoid mutual interference. Alternatively, a barrier 17 can be provided between the induced current generating mechanism 12 and the current sensing mechanism 14 to separate them. For example, when the induced current generating mechanism 12 includes an excitation magnetic ring and the current sensing mechanism 14 includes an induction magnetic ring, the barrier 17 can be made of an antimagnetic material to form a magnetic shielding pad to block magnetic field interference between the excitation magnetic ring and the induction magnetic ring.

[0043] In this embodiment, the induced current generating mechanism 12 and the current detection mechanism 14 can also be stacked within a housing 15 with a cavity and separated by a barrier 17 to reduce the impact of external environmental factors such as dust and rain on the performance. In this case, a channel for the filling tube 22 to pass through also needs to be provided on the housing 15. That is, the filling tube 22 passes through the induced current generating mechanism 12, the current detection mechanism 14, and the housing 15 simultaneously. The corresponding channels of the induced current generating mechanism 12, the current detection mechanism 14, and the housing 15 together form a through hole 13 for the filling tube 22 to pass through.

[0044] A cover plate 16 can also be installed on the housing 15 to seal the cavity of the housing 15, thereby placing the induced current generating mechanism 12 and the current detection mechanism 14 in a relatively independent space, further reducing the impact of external environmental factors such as dust and rain on their performance. At the same time, the cover plate 16 also has a channel for the filling pipe 22 to pass through.

[0045] The data processing system 11 can also be placed in a cavity inside the housing 15 and covered by a cover plate 16 to reduce the impact of external environmental factors such as dust and rain on the circuit of the data processing system 11.

[0046] like Figure 2 As shown, the detection device 10 described in this application embodiment can be installed on the side wall of the refueling equipment 21 (e.g., a gas dispenser), so that the refueling pipe 22 extending from the refueling equipment 21 passes through the through hole 13, without affecting the use of the refueling pipe 22.

[0047] like Figure 3 As shown, in order to facilitate the installation of the detection device 10 described in this application embodiment onto the dispensing device 21, a fixed bracket 18 can be connected to the outer wall of the housing 15 by means of screwing or welding. The fixed bracket 18 can facilitate the installation and disassembly of the dispensing device 21.

[0048] The cables 19 corresponding to the induced current generating mechanism 12, the current detection mechanism 14 and the data processing system 11 can be connected to the internal circuit of the filling device 21 to form a linkage with the filling device 21.

[0049] by Figure 2 The following describes the usage process of this application embodiment using the detection device 10 installed on the refueling device 21 as an example: First, the refueling pipe 22 is connected to the device to be refueled (such as a vehicle). Since both the refueling device 21 and the device to be refueled are in contact with the ground, an equivalent closed loop is formed between the refueling device 21, the refueling pipe 22, the device to be refueled, and the ground. That is, at this time, the refueling pipe 22 is located in the closed loop. The data processing system 11 causes the induced current generating mechanism 12 to generate an induced current in the refueling pipe 22. After the current detection mechanism 14 detects the induced current in the refueling pipe 22, it feeds back the signal to the data processing system 11. At this time, it is determined that the refueling pipe 22 is in a connected state. When the refueling pipe 22 is pulled off, such as when it becomes detached from the equipment to be refueled or from the refueling equipment 21, an effective closed loop cannot be formed between the refueling equipment 21, the refueling pipe 22, the equipment to be refueled, and the ground. In this case, the induced current generating mechanism 12 cannot generate an induced current for the refueling pipe 22, which is not in a closed loop, and the current detection mechanism 14 cannot detect the alternating current signal on the refueling pipe 22. Therefore, the signal transmitted to the data processing system 11 is different from the signal when there is current. Thus, it is determined that the refueling pipe 22 is in a detached state, and the refueling equipment 21 can be notified to stop supplying fuel or a warning can be issued.

[0050] As mentioned above, the induced current generating mechanism 12 and the current detection mechanism 14 can be as follows: Figure 2 The stacked arrangement shown is separated by a barrier 17. However, in actual use, the current generating mechanism 12 and the current sensing mechanism 14 can be separated in other ways. For example, the positional relationship between the induced current generating mechanism 12 and the current sensing mechanism 14 can also be as follows: Figure 4 The parallel misalignment shown, or as... Figure 5 The shown represents a right-angled relationship, or as... Figure 6 The acute angle relationship shown allows for application in special cases, such as corner positions or non-linear positions. Furthermore, the induced current generating mechanism 12 and the current detection mechanism 14 can even be housed in two separate housings 15, as long as the filling tube 22 can pass through both the induced current generating mechanism 12 and the current detection mechanism 14 simultaneously. Moreover, when the diameter of the filling tube 22 is not constant, the channel sizes of the induced current generating mechanism 12 and the current detection mechanism 14 can be set to be different to facilitate connection to different diameter sections of the filling tube 22.

[0051] In other situations, such as when the refueling station has specific installation location requirements for the refueling equipment 21, preventing it from reaching the ground and thus hindering the effective closure of the circuit between the refueling pipe 22 and the equipment to be refueled, a grounding clamp 23 can be connected to the refueling equipment 21 to allow it to contact the ground. Alternatively, the grounding clamp 23 can be directly connected to the refueling equipment 21 and the equipment being refueled. If the equipment being refueled cannot reach the ground, the grounding clamp 23 can be removed to establish electrical connection between the equipment and the ground.

[0052] Example 2

[0053] This application also provides another type of detection device with a different structural form. For example... Figure 7 As shown, it has the same installation position on the filling device 21 as the detection device described in Embodiment 1, the difference being that, as Figure 8 As shown, the entire detection device 10 is divided into two parts, including a first detection unit 100 and a second detection unit 200.

[0054] like Figure 9 As shown, the first detection unit 100 includes a first housing part 151, a first cover part 161, a first induced current generating part 121, a first current detection part 141, and a first barrier member 171.

[0055] like Figure 10 As shown, the second detection unit 200 includes a second housing part 152, a second cover part 162, a second induced current generating part 122, a second current detection part 142, and a second barrier member 172.

[0056] Alternatively, in this embodiment, the housing 15 is divided into a first housing portion 151 and a second housing portion 152, the cover plate 16 is divided into a first cover plate portion 161 and a second cover plate portion 162, the induced current generating mechanism 12 is divided into a first induced current generating part 121 and a second induced current generating part 122, and the current detection mechanism 14 is divided into a first current detection part 141 and a second current detection part 142.

[0057] In this way, the first housing part 151 can be directly installed onto the filling device 21, the fixing bracket 18 is connected to the first housing part 151, and the second housing part 152 can be detachably connected to the first housing part 151 by bolts or other fasteners. The first housing part 151 and the second housing part 152 wrap around both sides of the filling tube 22, and both the first housing part 151 and the second housing part 152 have cavities. The first induced current generating part 121 and the first current detecting part 141 are both located in the cavity of the first housing part 151, and the second induced current generating part 122 and the second current detecting part 142 are both located in the cavity of the second housing part 152. The first cover plate part 161 is used to cover the cavity of the first housing part 151, and the second cover plate part 162 is used to cover the cavity of the second housing part 152.

[0058] Within the first housing portion 151, a first barrier 171 can be used to prevent interference between the first induced current generating unit 121 and the first current sensing unit 141. Correspondingly, a second barrier 172 can be provided in the second housing portion 152 to prevent interference between the second induced current generating unit 122 and the second current sensing unit 142. That is, it is equivalent to splitting the barrier 17 in Embodiment 1 into a first barrier 171 and a second barrier 172.

[0059] It should be noted that the magnetic rings of the induced current generating mechanism 12 and the current detection mechanism 14 will not lose their effectiveness simply because they are split in two. This is because as long as the magnetic rings can form a circle, allowing the magnetic field to conduct within the rings, they can generate or detect current through the enameled wire.

[0060] The data processing system 11 can be located either in the cavity of the first housing part 151 or in the cavity of the second housing part 152.

[0061] In this embodiment, the detection device 10 is designed as a detachable structure, primarily to facilitate the placement of the filling tube 22 into the channel of the detection device 10. In Embodiment 1, the detection device 10 requires one end of the filling tube 22 to pass through the channel of the detection device 10 for installation. In this embodiment, however, the first detection part 100 is installed onto the filling device 21, and then the filling tube 22 is wrapped between the first detection part 100 and the second detection part 200. After tightening the bolts, the installation is complete, making it more convenient than Embodiment 1.

[0062] Example 3

[0063] This application also provides a system for detecting the connection status of a filling pipe, such as... Figure 11 As shown, it mainly includes an induced current generating circuit 30 and a current detection circuit 40.

[0064] The induced current generating circuit 30 is used to generate an induced current in the filling tube 22, which is in a closed loop. It includes a pulse generating circuit 31, an excitation circuit 32, and an excitation coil 33, which are electrically connected in sequence. The pulse generating circuit 31 generates a specific pulse signal. The excitation circuit 32 amplifies the pulse signal and applies it to the excitation coil 33. The excitation coil 33 generates an excitation current and applies it to the filling tube 22 in the closed loop to generate an induced current.

[0065] The current detection circuit 40 is used to detect whether an induced current is generated on the filling tube 22. If an induced current is detected on the filling tube 22, it is considered that the filling tube 22 is in a connected state; if no induced current is detected on the filling tube 22, it is considered that the filling tube 22 is in a disconnected state.

[0066] Specifically, the current detection circuit 40 includes a detection coil 41, a signal processing circuit 42, a discrimination circuit 43, a monostable circuit 44, a timing circuit 45, and a buffer circuit 46, which are electrically connected in sequence. The detection coil 41 detects whether an induced current exists on the filling tube 22; if an induced current is detected, a detection signal is output. The signal processing circuit 42 amplifies and filters the detection signal to obtain a processed signal. The discrimination circuit 43 identifies a characteristic signal from the processed signal and discriminates the amplitude of the characteristic signal to obtain a valid identification signal. The monostable circuit 44 converts the valid identification signal into a pulse signal with a fixed pulse width. The timing circuit 45 monitors the pulse signal and, within a timing period, provides a corresponding indication signal based on whether the monostable circuit 44 generates a pulse signal. The buffer circuit 46 processes the indication signal into a signal directly applicable to the external interface.

[0067] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The above preferred embodiments should not be considered as limitations on the present invention, and the scope of protection of the present invention should be determined by the scope defined in the claims. For those skilled in the art, various improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A device for detecting the connection status of a filling tube, used to detect the connection status of a filling tube (22) with conductive capability, characterized in that, The detection device (10) includes: At least one induced current generating mechanism (12) is used to generate an induced current in the filling tube (22) which is in a closed loop; At least one current detection mechanism (14) is provided at an interval from the induced current generating mechanism (12) for detecting whether an induced current is generated on the filling tube (22); The data processing system (11) is electrically connected to the current generating mechanism (12) and the current detection mechanism (14) respectively, and is used to control the current generating mechanism (12) to generate current, receive and process the data signal corresponding to the current detected by the current detection mechanism (14); Both the current generating mechanism (12) and the current detection mechanism (14) have channels through which the filling tube (22) passes; The detection device (10) further includes a housing (15) and a cover plate (16); the housing (15) has a cavity; the induced current generating mechanism (12), the current detection mechanism (14) and the data processing system (11) are all located in the cavity inside the housing (15); the cover plate (16) is used to cover the cavity of the housing (15); both the housing (15) and the cover plate (16) are provided with channels for the filling tube (22) to pass through; The housing (15) includes a first housing portion (151) and a second housing portion (152); the first housing portion (151) and the second housing portion (152) are detachably connected; the first housing portion (151) and the second housing portion (152) wrap around both sides of the filling tube (22); both the first housing portion (151) and the second housing portion (152) have cavities inside; The cover plate (16) includes a first cover plate portion (161) and a second cover plate portion (162); the first cover plate portion (161) is used to cover the cavity of the first housing portion (151); the second cover plate portion (162) is used to cover the cavity of the second housing portion (152); The induced current generating mechanism (12) includes a first induced current generating unit (121) and a second induced current generating unit (122). The current detection mechanism (14) includes a first current detection unit (141) and a second current detection unit (142). The first induced current generating unit (121) and the first current detecting unit (141) are both disposed in the cavity of the first housing part (151); the second induced current generating unit (122) and the second current detecting unit (142) are both disposed in the cavity of the second housing part (152); The data processing system (11) is located in the cavity of the first housing part (151) or the second housing part (152).

2. The device for detecting the connection status of a filling pipe as described in claim 1, characterized in that, The detection device (10) further includes a fixing bracket (18); the fixing bracket (18) is connected to the outer wall of the housing (15).

3. The device for detecting the connection status of a filling pipe as described in claim 1, characterized in that, An isolation element (17) is provided between the induced current generating mechanism (12) and the current detection mechanism (14) to prevent mutual interference between the induced current generating mechanism (12) and the current detection mechanism (14).

4. The filling pipe connection status detection device as described in claim 3, characterized in that, The induced current generating mechanism (12) includes an excitation magnetic ring and an excitation coil, with the excitation coil wound around the excitation magnetic ring; the current detection mechanism (14) includes an induction magnetic ring and an induction coil, with the induction coil wound around the induction magnetic ring; the barrier (17) is a magnetic shielding pad.

5. The device for detecting the connection status of a filling pipe as described in claim 1, characterized in that, The positional relationship between the current generating mechanism (12) and the current detection mechanism (14) is stacked, parallel and misaligned, or at an angle to each other.

6. A detection system for use in the detection apparatus according to any one of claims 1-5, for detecting the connection status of a conductive filling tube (22), characterized in that, The detection system includes: An induced current generating circuit (30) is used to generate an induced current in the filling tube (22) which is in a closed loop; The current detection circuit (40) is used to detect whether an induced current is generated on the filling tube (22); if an induced current is detected on the filling tube (22), it is considered that the filling tube (22) is in a connected state; if no induced current is detected on the filling tube (22), it is considered that the filling tube (22) is in a disconnected state.

7. The detection system as described in claim 6, characterized in that, The induced current generating circuit (30) includes a pulse generating circuit (31), an excitation circuit (32), and an excitation coil (33) connected in sequence. The pulse generating circuit (31) is used to generate a specific pulse signal. The excitation circuit (32) is used to amplify the pulse signal and apply it to the excitation coil (33). The excitation coil (33) is used to generate an excitation current and apply it to the filling tube (22) in the closed loop to generate an induced current.

8. The detection system as described in claim 6, characterized in that, The current detection circuit (40) includes a detection coil (41), a signal processing circuit (42), a discrimination circuit (43), a monostable circuit (44), a timing circuit (45), and a buffer circuit (46) that are electrically connected in sequence. The detection coil (41) is used to detect whether there is an induced current on the filling tube (22); if an induced current is detected, a detection signal is output. The signal processing circuit (42) is used to amplify and filter the detection signal to obtain the processed signal; The discrimination circuit (43) is used to identify the feature signal from the processed signal and to discriminate the amplitude of the feature signal to obtain an effective recognition signal. The monostable circuit (44) is used to convert the valid identification signal into a pulse signal with a fixed pulse width; The timing circuit (45) is used to monitor the pulse signal and, within the timing period, provides a corresponding indication signal based on whether the monostable circuit (44) generates a pulse signal. The buffer circuit (46) is used to process the indication signal into a signal that can be directly applied to the external interface.

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