An electric suspension hinge cable connection state inspection device and method

Abstract

The application provides a kind of electric suspension hinge cable connection state inspection device and method, the device includes mobile device and be set on mobile device two high-frequency transmitting coil, three high-frequency receiving coil, electronic commutator, high-frequency current source, signal acquisition and processing module;Mobile device is used to drive two high-frequency transmitting coil, three high-frequency receiving coil, electronic commutator, high-frequency current source, signal acquisition module along the train advancing direction and moves in positive direction or reverse direction;Two high-frequency transmitting coil is used to emit signal, so that the current induced in the pair of 8-shaped suspension coil relative to the position of two high-frequency transmitting coil is generated;High-frequency current source is used to be commutated by electronic commutator to make two high-frequency transmitting coil switch to in-phase working state or anti-phase working state;Three high-frequency receiving coil is used to receive signal, and send to signal acquisition and processing module;Signal acquisition and processing module is used to judge whether the connection state of hinge cable is normal.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of rail transit, in particular to a device and method for inspecting the connection state of a hinged cable of an electrically suspended rail. BACKGROUND

[0002] A superconducting electric suspension electromagnetic propulsion system has advantages such as large thrust, high efficiency, and high lift-to-drag ratio, and has broad application prospects in high-speed and super-high-speed rail transit. The superconducting electric suspension system generally uses a U-shaped track, installs 8-shaped suspension coils on both sides of the track, and connects the two corresponding 8-shaped suspension coil lead wires in parallel through two hinged cables to realize a double-sided coil closed loop, provide a guiding recovery current for a vehicle with a guiding deviation, and increase the system guiding stiffness.

[0003] The hinged cables laid transversely need to cross the bottom of the track beam. In order to reduce the number of holes punched in the track bottom, the four hinged cables connecting two adjacent 8-shaped suspension coils are generally passed through the same hole. During the long-distance installation and laying process, a large number of hinged cables are passed through the hole, and when connected, the 8-shaped suspension coil lead wires are wrongly connected, resulting in errors such as the actual double-sided closed loop formed being opposite to the design or two adjacent pairs of 8-shaped suspension coils being connected together to form a closed loop.

[0004] The reverse connection of the double-sided 8-shaped suspension coil hinged cable will cause the magnetic drag of the 8-shaped suspension coil to be much larger than the correct connection, and the mixed connection of the adjacent 8-shaped suspension coil hinged cable will cause the guiding stiffness to suddenly change and the magnetic drag to increase. When the vehicle passes through the wrong connection of the hinged cable during normal driving, the on-board superconducting magnet will be subjected to a large electromagnetic impact, causing the magnet to lose superconductivity and the vehicle attitude to be unstable. Therefore, it is necessary to strictly avoid the wrong connection of the hinged cable during the construction of the electric suspension system.

[0005] Since the electric 8-shaped suspension coil is a passive induction coil, there is no exposed loop measuring point for detection after the double-sided closed loop, so currently only manual pulling of the hinged cable can be used to judge the correctness of the interface connection and visual inspection can be performed by marking the interface with different colors.

[0006] The current manual pulling of the hinged cable for inspection has a large workload and cannot be applied to kilometer-level long-distance inspection. Marking the interface with different colors can reduce the inspection workload to some extent, but it is still a manual inspection and there is still a problem of missed inspection when the number is large. SUMMARY

[0007] The present application provides a device and method for inspecting the connection state of a hinged cable of an electrically suspended rail, which can solve the technical problem of a large workload of the current manual pulling of the hinged cable for inspection, which cannot be applied to kilometer-level long-distance inspection.

[0008] According to an aspect of the present application, there is provided a device for inspecting the connection state of a motorized suspension hinged cable, comprising a mobile device and two high-frequency transmitting coils, three high-frequency receiving coils, an electronic commutator, a high-frequency current source, a signal acquisition and processing module arranged on the mobile device;

[0009] The mobile device is used to drive the two high-frequency transmitting coils, the three high-frequency receiving coils, the electronic commutator, the high-frequency current source and the signal acquisition module to move forward or backward along the direction of train propulsion.

[0010] The two high-frequency transmitting coils are arranged on the two sides of the mobile device along the direction of train guidance. The two high-frequency transmitting coils are connected in series through the electronic commutator. The centroid height of the two high-frequency transmitting coils is the same as that of the upper part of the 8-shaped suspension coil laid on the track, and the guidance distance of the two high-frequency transmitting coils from the corresponding 8-shaped suspension coil is the same. The two high-frequency transmitting coils are used to transmit signals to generate induced current in the pair of 8-shaped suspension coils opposite to the positions of the two high-frequency transmitting coils, wherein the transmitted signals are high-frequency alternating magnetic fields.

[0011] The high-frequency current source is connected with the electronic commutator, and is used to commutate through the electronic commutator to switch the two high-frequency transmitting coils to the in-phase working state or the anti-phase working state.

[0012] The three high-frequency receiving coils are arranged on any side of the mobile device along the direction of train propulsion at equal intervals. The centroid distance of the three high-frequency receiving coils is the same as that of the lower part of the 8-shaped suspension coil, and the centroid height is the same as that of the lower part of the 8-shaped suspension coil. The high-frequency receiving coil at the middle position is directly below the corresponding high-frequency transmitting coil. The three high-frequency receiving coils are used to receive signals and send them to the signal acquisition and processing module, wherein the received signals are high-frequency voltages induced in the high-frequency receiving coils by the alternating magnetic fields generated by the induced current of the corresponding 8-shaped suspension coil of each of the three high-frequency receiving coils.

[0013] The signal acquisition and processing module is connected with the three high-frequency receiving coils, and is used to determine whether the connection state of the hinged cable is normal according to the received signals of the three high-frequency receiving coils.

[0014] Preferably, the signal acquisition and processing module is further used to acquire the mileage data of the mobile device, and output the mileage data to determine the position of the hinged cable when it is detected that the connection state of the hinged cable is abnormal.

[0015] Preferably, in the case that the high-frequency current source is commutated by the electronic commutator to switch the two high-frequency transmitting coils into the in-phase working state:

[0016] If the pulsating peak value of the received signal of the high-frequency receiving coil in the middle position in the current period is the same as the first preset pulsating peak value, and the pulsating valley value is the same as the first preset pulsating valley value; and the pulsating peak value of the received signal of the high-frequency receiving coil in the two end positions is the same as the second preset pulsating peak value, and the pulsating valley value is the same as the second preset pulsating valley value; then the connection state of the 8-shaped levitation coil hinged cable corresponding to the received signal of the high-frequency receiving coil in the middle position in the current period is normal when the received signal is at the pulsating peak value; wherein the second preset pulsating peak value is less than or equal to the first preset pulsating valley value;

[0017] If the pulsating peak value of the received signal of the high-frequency receiving coil in the middle position in the current period is less than the first preset pulsating valley value; and the pulsating peak value of the received signal of the high-frequency receiving coil in the two end positions is not greater than the second preset pulsating peak value; then the 8-shaped levitation coil hinged cable corresponding to the high-frequency receiving coil in the middle position in the current period has a reverse connection fault when the received signal is at the pulsating peak value.

[0018] If the pulsating peak value of the received signal of the high-frequency receiving coil in the middle position in the current period is less than one-half of the first preset pulsating peak value; and one of the pulsating peak values of the received signal of the high-frequency receiving coil in the two end positions is not greater than the second preset pulsating peak value, and the other is greater than one-fourth of the first preset pulsating peak value; then the 8-shaped levitation coil hinged cable corresponding to the high-frequency receiving coil in the middle position in the current period has a mixed connection fault with the adjacent 8-shaped levitation coil hinged cable when the received signal is at the pulsating peak value.

[0019] If the pulsating peak value of the received signal of the high-frequency receiving coil in the middle position in the current period is less than the first preset pulsating valley value; and the pulsating peak value of the received signal of the high-frequency receiving coil in the two end positions is the same as the second preset pulsating peak value, and the pulsating valley value is the same as the second preset pulsating valley value; then the 8-shaped levitation coil hinged cable corresponding to the high-frequency receiving coil in the middle position in the current period has a broken connection fault when the received signal is at the pulsating peak value.

[0020] Preferably, in the case that the high-frequency current source is commutated by the electronic commutator to switch the two high-frequency transmitting coils into the anti-phase working state:

[0021] If the pulsating peak value of the received signal of the high-frequency receiving coil in the middle position in the current period is the same as the first preset pulsating peak value, and the pulsating peak values of the received signals of the high-frequency receiving coils at both ends are not greater than the second preset pulsating peak value, then the received signal of the high-frequency receiving coil in the middle position in the current period is a pulsating peak value, and the 8-shaped suspension coil hinged cable corresponding to the pulsating peak value exists a reverse connection fault;

[0022] If the received signal of any one of the high-frequency receiving coils suddenly changes from 0 to a value greater than one fourth of the first preset pulsating peak value, then the high-frequency receiving coil with the suddenly changed received signal and the adjacent 8-shaped suspension coil hinged cable exist a mixed connection fault.

[0023] Preferably, the frequency range of the transmitted signal is 1 kHz to 100 kHz.

[0024] Preferably, the ratio of the running speed of the mobile device to the distance between the adjacent two 8-shaped suspension coils is two orders of magnitude smaller than the frequency of the transmitted signal.

[0025] Preferably, the mobile device is a patrol vehicle.

[0026] According to another aspect of the present application, there is provided an electric suspension hinged cable connection state patrol method, which uses any one of the above-mentioned devices to patrol the connection state of the hinged cable, and the method comprises:

[0027] The mobile device drives the patrol device to move forward from the detection starting point along the direction of train propulsion, and at the same time, the high-frequency current source switches the two high-frequency transmitting coils to the in-phase working state through the electronic commutator.

[0028] The two high-frequency transmitting coils transmit high-frequency alternating magnetic fields to make a pair of 8-shaped suspension coils opposite to the positions of the two high-frequency transmitting coils generate induced currents.

[0029] The three high-frequency receiving coils receive the alternating magnetic fields generated by the induced currents of the respective corresponding 8-shaped suspension coils and send them to the signal acquisition and processing module.

[0030] The signal acquisition and processing module judges whether the connection state of the hinged cable is normal according to the respective received signals of the three high-frequency receiving coils.

[0031] When the patrol device moves to the detection ending point, the mobile device drives the patrol device to move reversely from the detection ending point along the direction of train propulsion, and at the same time, the high-frequency current source switches the two high-frequency transmitting coils to the anti-phase working state through the electronic commutator.

[0032] The two high-frequency transmitting coils transmit high-frequency alternating magnetic fields to cause the pair of 8-shaped levitation coils currently opposite the two high-frequency transmitting coils to generate induced currents;

[0033] The three high-frequency receiving coils receive alternating magnetic fields generated by the induced currents of the respective corresponding 8-shaped levitation coils and send to the signal acquisition and processing module;

[0034] The signal acquisition and processing module determines whether the connection state of the hinge cable is normal according to the respective receiving signals of the three high-frequency receiving coils.

[0035] When the inspection device returns to the detection starting point again, the detection of the hinge cable of the current section is completed.

[0036] Preferably, the method further comprises: outputting the mileage data to determine the position of the hinge cable in the case where it is detected that the connection state of the hinge cable is abnormal.

[0037] Preferably, in the case where the mobile device drives the inspection device to move forward along the train advancing direction from the detection starting point, the signal acquisition and processing module determines whether the connection state of the hinge cable is normal according to the respective receiving signals of the three high-frequency receiving coils.

[0038] If the pulsation peak value of the receiving signal of the high-frequency receiving coil at the middle position in the current period of the receiving signal is the same as the first preset pulsation peak value, and the pulsation valley value is the same as the first preset pulsation valley value; and the pulsation peak value of the receiving signal of the high-frequency receiving coil at both ends is the same as the second preset pulsation peak value, and the pulsation valley value is the same as the second preset pulsation valley value; then the connection state of the 8-shaped levitation coil hinge cable corresponding to the receiving signal of the high-frequency receiving coil at the middle position in the current period is normal when the receiving signal is at the pulsation peak value; wherein the second preset pulsation peak value is less than or equal to the first preset pulsation valley value;

[0039] If the pulsation peak value of the receiving signal of the high-frequency receiving coil at the middle position in the current period of the receiving signal is less than the first preset pulsation valley value; and the pulsation peak value of the receiving signal of the high-frequency receiving coil at both ends is not greater than the second preset pulsation peak value; then the 8-shaped levitation coil hinge cable at the middle position in the current period has a reverse connection fault when the receiving signal is at the pulsation peak value.

[0040] If the pulsation peak value of the received signal of the high-frequency receiving coil in the middle position in the current period of the received signal is less than one half of the first preset pulsation peak value, and one of the pulsation peak values of the received signal of the high-frequency receiving coil in the two ends is not greater than the second preset pulsation peak value, and the other is greater than one fourth of the first preset pulsation peak value, then the 8-shaped suspension coil hinged cable corresponding to the high-frequency receiving coil in the middle position in the current period of the received signal has a mixed connection fault when the received signal is in the pulsation peak value.

[0041] If the pulsation peak value of the received signal of the high-frequency receiving coil in the middle position in the current period of the received signal is less than the first preset pulsation valley value, and the pulsation peak values of the received signal of the high-frequency receiving coil in the two ends are the same as the second preset pulsation peak value, and the pulsation valley values are the same as the second preset pulsation valley value, then the 8-shaped suspension coil hinged cable corresponding to the high-frequency receiving coil in the middle position in the current period of the received signal has a disconnection fault when the received signal is in the pulsation peak value.

[0042] Preferably, in the case that the mobile device drives the inspection device to move reversely from the detection end point along the train advancing direction, the signal acquisition and processing module judges whether the connection state of the hinged cable is normal according to the received signals of the three high-frequency receiving coils, comprising:

[0043] If the pulsation peak value of the received signal of the high-frequency receiving coil in the middle position in the current period of the received signal is the same as the first preset pulsation peak value, and the pulsation peak values of the received signal of the high-frequency receiving coil in the two ends are both not greater than the second preset pulsation peak value, then the 8-shaped suspension coil hinged cable corresponding to the high-frequency receiving coil in the middle position in the current period of the received signal has a reverse connection fault when the received signal is in the pulsation peak value.

[0044] If the received signal of any one of the high-frequency receiving coils suddenly changes from 0 to a value greater than one fourth of the first preset pulsation peak value, then the 8-shaped suspension coil hinged cable corresponding to the high-frequency receiving coil with the sudden change of the received signal has a mixed connection fault with the adjacent 8-shaped suspension coil hinged cable.

[0045] Compared with the prior art, the technical scheme of the present application has the following beneficial effects:

[0046] 1. The two high-frequency transmitting coils, the three high-frequency receiving coils, the corresponding high-frequency current source and the signal acquisition and processing module are combined, the structure is simple, the degree of automation is high, and all the wrong connection states can be checked out through one-way and return inspection, which greatly improves the inspection efficiency compared with manual inspection.

[0047] 2. Different fault connection, mixed connection, and disconnected forms can be identified by corresponding fault identification states in two kinds of transmission coil phase modes, and there is obvious difference between the identification signals of the fault and no fault, which will not cause false detection and missed detection. BRIEF DESCRIPTION OF DRAWINGS

[0048] The accompanying drawings, which are included to provide a further understanding of the embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. As shown in the drawings, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those of ordinary skill in the art without creative labor based on these drawings.

[0049] Figure 1 The structure diagram of the electric suspension hinge cable connection state inspection device provided by an embodiment of the application is shown;

[0050] Figure 2 The structure diagram of the high-frequency transmission coil and the high-frequency receiving coil of the electric suspension hinge cable connection state inspection device is shown; Figure 1 The structure diagram of the high-frequency transmission coil and the high-frequency receiving coil of the electric suspension hinge cable connection state inspection device is shown;

[0051] Figure 3 The schematic diagram of the transmission signal phase generating the receiving signal in normal connection is shown;

[0052] Figure 4a The schematic diagram of the high-frequency receiving signal generated by the intermediate high-frequency receiving coil in normal connection is shown;

[0053] Figure 4b The schematic diagram of the high-frequency receiving signal generated by the two-end high-frequency receiving coil in normal connection is shown;

[0054] Figure 5 The schematic diagram of the transmission signal phase generating the receiving signal in bilateral reverse connection is shown;

[0055] Figure 6 The schematic diagram of the transmission signal phase generating the receiving signal in adjacent coil mixed connection state 1 is shown;

[0056] Figure 7 The schematic diagram of the transmission signal phase generating the receiving signal in adjacent coil mixed connection state 2 is shown.

[0057] Among the above drawings, the following reference signs are included:

[0058] 1, 8-shaped floating coil; 11, left lower 8-shaped floating coil loop; 12, left upper 8-shaped floating coil loop; 13, right upper 8-shaped floating coil loop; 14, right lower 8-shaped floating coil loop; 2, hinge cable; 3, high-frequency transmitting coil; 31, left high-frequency transmitting coil; 32, right high-frequency transmitting coil; 4, high-frequency receiving coil; 41, middle high-frequency receiving coil; 42, end high-frequency receiving coil; 5, mobile device; 6, track beam; 51, electronic commutator; 52, high-frequency current source; 53, signal acquisition and processing module. DETAILED DESCRIPTION

[0059] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict. The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0060] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a reference to the presence of a feature, step, operation, device, component and / or combinations thereof.

[0061] Unless specifically stated otherwise, the relative arrangement of components and steps, numerical expressions, and numerical values set forth in the various embodiments described herein are not limiting. Also, it should be understood that the various parts shown in the drawings are not necessarily drawn to scale. Techniques, methods, and devices known to those of ordinary skill in the art can not be discussed in detail, but should be considered as part of the description of the present application. In all examples shown and discussed herein, any specific value should be interpreted as merely an example, and not as a limitation. Thus, other examples of the exemplary embodiments can have different values. It should be noted that like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be discussed further in subsequent drawings.

[0062] As Figure 1 and Figure 2As shown, the present application provides a kind of electric suspension hinge cable connection state inspection device, the device includes mobile device 5 and be set to two high frequency transmitting coil 3 of the mobile device 5, three high frequency receiving coil 4, electronic commutator 51, high frequency current source 52, signal acquisition and processing module 53;

[0063] The mobile device 5 is used to drive two high frequency transmitting coil 3, three high frequency receiving coil 4, electronic commutator 51, high frequency current source 52 and signal acquisition module to move in the positive direction or reverse direction along the train advancing direction;

[0064] Two high frequency transmitting coil 3 are set to the two sides of the mobile device 5 along the train direction;Two high frequency transmitting coil 3 are connected in series by the electronic commutator 51;The centroid height of two high frequency transmitting coil 3 is same as the centroid height of the upper part coil in the track laying 8-shaped suspension coil 1, and the guiding distance of two high frequency transmitting coil 3 from the corresponding side 8-shaped suspension coil 1 is same;Two high frequency transmitting coil 3 are used to emit signals to make the current induced in the current pair of 8-shaped suspension coil 1 corresponding to the position of two high frequency transmitting coil 3, wherein the emitted signal is high frequency alternating magnetic field;

[0065] The high frequency current source 52 is connected with the electronic commutator 51, for switching by the electronic commutator 51 to make two high frequency transmitting coil 3 switch to the same phase working state or opposite phase working state;

[0066] Three high frequency receiving coil 4 are set to the arbitrary side of the mobile device 5 along the train advancing direction at equal intervals, and the centroid distance of three high frequency receiving coil 4 is same as the centroid distance of the lower part coil in the 8-shaped suspension coil 1, and the centroid height is same as the centroid height of the lower part coil in the 8-shaped suspension coil 1;The high frequency receiving coil 4 in the middle position is directly below the corresponding side high frequency transmitting coil 3;Three high frequency receiving coil 4 are used to receive signals and send to the signal acquisition and processing module 53, wherein the received signal is the high frequency voltage induced in the high frequency receiving coil by the alternating magnetic field of the induced current of the corresponding 8-shaped suspension coil 1 of three high frequency receiving coil 4 respectively;

[0067] The signal acquisition and processing module 53 is connected with three high frequency receiving coil 4, for judging whether the connection state of hinge cable 2 is normal according to the received signal of three high frequency receiving coil 4 respectively.

[0068] Compared with the prior art, the present application has the following beneficial effects:

[0069] 1. The two high-frequency transmitting coils 3 and three high-frequency receiving coils 4 are matched with corresponding high-frequency current sources 52 and signal acquisition and processing modules 53, which has simple structure and high automation, and can check all wrong connection states in one round trip, greatly improving the inspection efficiency compared with manual inspection.

[0070] 2. Different wrong connection, mixed connection and disconnected forms can be identified by corresponding fault identification states in two transmitting coil phase modes, and there is obvious difference between the identification signals of fault and no fault, so as to avoid false detection and missed detection.

[0071] According to an embodiment of the present application, the signal acquisition and processing module 53 is also used to collect mileage data of the mobile device 5, and output the mileage data to determine the position of the hinge cable 2 when detecting that the connection state of the hinge cable 2 is abnormal, so as to facilitate subsequent manual troubleshooting.

[0072] In the present application, the double-sided transmitting coil is switched to the in-phase working state by the electronic commutator 51, and in this state, the spatial magnetic field directions of the two high-frequency transmissions are the same at each moment. During the line inspection process, the two high-frequency transmitting coils 3 continuously emit high-frequency alternating magnetic fields, and the three high-frequency receiving coils 4 continuously receive the alternating magnetic field generated by the induced current of the 8-shaped suspension coil 1 through the magnetic field-voltage conversion form, so that the receiving signals of the three high-frequency receiving coils 4 are periodic receiving signals. Among them, the high-frequency current transmission frequency and current combination make the high-frequency alternating magnetic field generated by the induced alternating current in a pair of 8-shaped suspension coils 1 produce an effective receiving signal peak value of 10V or more in the receiving coil.

[0073] In addition, in the case that the centroids of the two high-frequency transmitting coils 3 are opposite to the centroid positions of any pair of 8-shaped suspension coils 1, the receiving signal of the high-frequency receiving coil 41 in the middle position reaches the first pulsation peak value E2max, and the receiving signal of the high-frequency receiving coil 42 at both ends reaches the second pulsation valley value E13min; in the case that the centroids of the two high-frequency transmitting coils 3 are opposite to the middle points of the connecting lines of the centroids of any two pairs of 8-shaped suspension coils 1, the receiving signal of the high-frequency receiving coil 41 in the middle position reaches the first pulsation valley value E2min, and the receiving signal of the high-frequency receiving coil 42 at both ends reaches the second pulsation peak value E13max; wherein E13max≤E2min.

[0074] When the periodic receiving signal E2 generated by the high-frequency receiving coil 41 in the middle position is a periodic pulsation corresponding to the set running speed, and the pulsation peak E13max of the high-frequency receiving coil 42 at both ends does not exceed the pulsation valley E2min of the high-frequency receiving coil 41 in the middle position, the inspection system determines that the connection state of the 8-shaped suspension coil 1 hinged cable 2 at the peak point position passed by the high-frequency receiving coil 4 is normal.

[0075] According to an embodiment of the present application, in the case where the high-frequency current source 52 is commutated by the electronic commutator 51 to switch the two high-frequency transmitting coils 3 to the in-phase working state:

[0076] If the pulsation peak of the receiving signal of the high-frequency receiving coil 41 in the middle position in the current period of the receiving signal is the same as the first preset pulsation peak, and the pulsation valley is the same as the first preset pulsation valley; and the pulsation peak of the receiving signal of the high-frequency receiving coil 42 at both ends is the same as the second preset pulsation peak, and the pulsation valley is the same as the second preset pulsation valley; then the connection state of the 8-shaped suspension coil 1 hinged cable 2 corresponding to the high-frequency receiving coil 41 in the middle position when the receiving signal is at the pulsation peak in the current period is normal; wherein the second preset pulsation peak is less than or equal to the first preset pulsation valley;

[0077] If the pulsation peak of the receiving signal of the high-frequency receiving coil 41 in the middle position in the current period of the receiving signal is less than the first preset pulsation valley; and the pulsation peak of the receiving signal of the high-frequency receiving coil 42 at both ends is not greater than the second preset pulsation peak; then the 8-shaped suspension coil 1 hinged cable 2 corresponding to the high-frequency receiving coil 41 in the middle position when the receiving signal is at the pulsation peak in the current period has a reverse connection fault;

[0078] If the pulsation peak of the receiving signal of the high-frequency receiving coil 41 in the middle position in the current period of the receiving signal is less than one-half of the first preset pulsation peak; and one of the pulsation peaks of the receiving signals of the high-frequency receiving coils 42 at both ends is not greater than the second preset pulsation peak, and the other is greater than one-fourth of the first preset pulsation peak; then the 8-shaped suspension coil 1 hinged cable 2 corresponding to the high-frequency receiving coil 41 in the middle position when the receiving signal is at the pulsation peak in the current period has a mixed connection fault with the adjacent 8-shaped suspension coil 1 hinged cable 2;

[0079] If the pulsating peak value of the receiving signal of the high-frequency receiving coil 41 in the middle position in the current period of the receiving signal is less than the first preset pulsating valley value, and the pulsating peak value of the receiving signal of the high-frequency receiving coil 42 in the two ends is the same as the second preset pulsating peak value, and the pulsating valley value is the same as the second preset pulsating valley value, then the receiving signal of the high-frequency receiving coil 41 in the middle position in the current period is a pulsating peak value, and the 8-shaped suspension coil 1 hinged cable 2 corresponding to the pulsating peak value has a disconnection fault.

[0080] In the present application, the double-sided transmitting coil is switched to an anti-phase working state by the electronic commutator 51, in which the spatial magnetic field directions of the high-frequency transmission on both sides are opposite at each moment. In the process of line inspection, the transmission signal frequency, the running speed of the inspection device and the positive connection are consistent. In this state, no induced current is generated in the two lower coils of the normal 8-shaped suspension coil 1, and the signals of the three high-frequency receiving coils 4 are all 0.

[0081] According to an embodiment of the present application, in the case where the high-frequency current source 52 is commutated by the electronic commutator 51 to switch the two high-frequency transmitting coils 3 to an anti-phase working state:

[0082] If the pulsating peak value of the receiving signal of the high-frequency receiving coil 41 in the middle position in the current period of the receiving signal is the same as the first preset pulsating peak value, and the pulsating peak value of the receiving signal of the high-frequency receiving coil 42 in the two ends is not greater than the second preset pulsating peak value, then the receiving signal of the high-frequency receiving coil 41 in the middle position in the current period is a pulsating peak value, and the 8-shaped suspension coil 1 hinged cable 2 corresponding to the pulsating peak value has a reverse connection fault.

[0083] If the receiving signal of any one of the high-frequency receiving coils 4 suddenly changes from 0 to a value greater than one fourth of the first preset pulsating peak value, then the 8-shaped suspension coil 1 hinged cable 2 corresponding to the high-frequency receiving coil 4 with the sudden change of the receiving signal and the adjacent 8-shaped suspension coil 1 hinged cable 2 have a mixed connection fault.

[0084] According to an embodiment of the present application, the frequency range of the transmission signal is 1 kHz to 100 kHz.

[0085] According to an embodiment of the present application, the ratio of the running speed of the mobile device 5 to the spacing of the adjacent two 8-shaped suspension coils 1 is two orders of magnitude smaller than the frequency of the transmission signal. Specifically, the inspection device controls the running speed by the mobile device 5 to make the frequency of the high-frequency transmitting coil 3 passing through the spacing of the two 8-shaped suspension coils 1 not greater than 10 Hz.

[0086] Among them, the frequency of the receiving signal is the same as that of the transmission signal, so the amplitude of the receiving signal pulsates according to the time of completely passing through one 8-shaped suspension coil 1 spacing as a period.

[0087] According to an embodiment of the present application, the mobile device 5 is a patrol vehicle, which drives other components to move.

[0088] According to another aspect of the present application, a method for detecting the connection state of a motorized suspension hinge cable is provided, which uses any of the above-mentioned devices to detect the connection state of the hinge cable 2, and the method comprises:

[0089] The mobile device 5 drives the detection device to move forward from the detection starting point to the detection ending point along the train advancing direction, and the high-frequency current source 52 switches the two high-frequency transmitting coils 3 to be in-phase working state through the electronic commutator 51;

[0090] The two high-frequency transmitting coils 3 emit high-frequency alternating magnetic field to generate induced current in the pair of 8-shaped suspension coils 1 currently opposite to the two high-frequency transmitting coils 3;

[0091] The three high-frequency receiving coils 4 receive the alternating magnetic field generated by the induced current of the respective corresponding 8-shaped suspension coils 1 and send to the signal acquisition and processing module 53;

[0092] The signal acquisition and processing module 53 judges whether the connection state of the hinge cable 2 is normal according to the respective receiving signals of the three high-frequency receiving coils 4;

[0093] When the detection device moves to the detection ending point, the mobile device 5 drives the detection device to move reversely from the detection ending point to the detection starting point along the train advancing direction, and the high-frequency current source 52 switches the two high-frequency transmitting coils 3 to be in anti-phase working state through the electronic commutator 51;

[0094] The two high-frequency transmitting coils 3 emit high-frequency alternating magnetic field to generate induced current in the pair of 8-shaped suspension coils 1 currently opposite to the two high-frequency transmitting coils 3;

[0095] The three high-frequency receiving coils 4 receive the alternating magnetic field generated by the induced current of the respective corresponding 8-shaped suspension coils 1 and send to the signal acquisition and processing module 53;

[0096] The signal acquisition and processing module 53 judges whether the connection state of the hinge cable 2 is normal according to the respective receiving signals of the three high-frequency receiving coils 4;

[0097] When the detection device returns to the detection starting point again, the detection of the hinge cable 2 in the current section is completed.

[0098] According to an embodiment of the present application, the method further comprises: outputting the mileage data to determine the position of the hinge cable 2 in the case that the connection state of the hinge cable 2 is detected to be abnormal.

[0099] According to an embodiment of the present application, in the case that the mobile device 5 drives the inspection device to move forward along the train advancing direction from the detection starting point, the signal acquisition and processing module 53 determines whether the connection state of the hinge cable 2 is normal according to the received signals of the three high-frequency receiving coils 4, including:

[0100] If the pulsation peak value of the received signal of the high-frequency receiving coil 41 at the middle position in the current period of the received signal is the same as the first preset pulsation peak value, and the pulsation valley value is the same as the first preset pulsation valley value; and the pulsation peak value of the received signal of the high-frequency receiving coil 42 at the two ends is the same as the second preset pulsation peak value, and the pulsation valley value is the same as the second preset pulsation valley value; then the connection state of the 8-shaped suspension coil 1 hinge cable 2 corresponding to the received signal of the high-frequency receiving coil 41 at the middle position when the received signal is a pulsation peak value in the current period is normal; wherein the second preset pulsation peak value is less than or equal to the first preset pulsation valley value;

[0101] If the pulsation peak value of the received signal of the high-frequency receiving coil 41 at the middle position in the current period of the received signal is less than the first preset pulsation valley value; and the pulsation peak value of the received signal of the high-frequency receiving coil 42 at the two ends is not greater than the second preset pulsation peak value; then the 8-shaped suspension coil 1 hinge cable 2 corresponding to the received signal of the high-frequency receiving coil 41 at the middle position when the received signal is a pulsation peak value in the current period has a reverse connection fault;

[0102] If the pulsation peak value of the received signal of the high-frequency receiving coil 41 at the middle position in the current period of the received signal is less than one-half of the first preset pulsation peak value; and one of the pulsation peak values of the received signals of the high-frequency receiving coils 42 at the two ends is not greater than the second preset pulsation peak value, and the other is greater than one-fourth of the first preset pulsation peak value; then the 8-shaped suspension coil 1 hinge cable 2 corresponding to the received signal of the high-frequency receiving coil 41 at the middle position when the received signal is a pulsation peak value in the current period has a mixed connection fault with the adjacent 8-shaped suspension coil 1 hinge cable 2;

[0103] If the pulsation peak value of the received signal of the high-frequency receiving coil 41 at the middle position in the current period of the received signal is less than the first preset pulsation valley value; and the pulsation peak value of the received signal of the high-frequency receiving coil 42 at the two ends is the same as the second preset pulsation peak value, and the pulsation valley value is the same as the second preset pulsation valley value; then the 8-shaped suspension coil 1 hinge cable 2 corresponding to the received signal of the high-frequency receiving coil 41 at the middle position when the received signal is a pulsation peak value in the current period has a broken connection fault.

[0104] According to an embodiment of the present application, in the case that the mobile device 5 drives the inspection device to move reversely from the detection end point along the train advancing direction, the signal acquisition and processing module 53 judges whether the connection state of the hinge cable 2 is normal according to the receiving signals of the three high-frequency receiving coils 4, including:

[0105] If the pulsating peak value of the receiving signal of the high-frequency receiving coil 41 at the middle position in the current period is the same as the first preset pulsating peak value, and the pulsating peak values of the receiving signals of the high-frequency receiving coils 42 at both ends are not greater than the second preset pulsating peak value, then the receiving signal of the high-frequency receiving coil 41 at the middle position in the current period is the pulsating peak value, and the corresponding 8-shaped suspension coil 1 hinge cable 2 exists reverse connection fault;

[0106] If the receiving signal of any one of the high-frequency receiving coils 4 suddenly changes from 0 to a value greater than one fourth of the first preset pulsating peak value, then the high-frequency receiving coil 4 corresponding to the receiving signal suddenly changes exists mixed connection fault with the adjacent 8-shaped suspension coil 1 hinge cable 2.

[0107] In order to have a further understanding of the present application, the following will be combined with Figures 3-7 The electric suspension hinge cable 2 connection state inspection device and method of the present application will be described in detail.

[0108] In the present embodiment, as shown in the correct connection state, Figure 3 the two side transmitting coils are supplied with the same phase, at this time the two upper coils and become the same phase power supply in the parallel circuit, and the induced current can be generated in both lower coils, at this time the high-frequency receiving coil 4 directly below the transmitting coil can receive the receiving signal Er2=E2max generated by the sum of the induced voltages of the two high-frequency transmitting coils 3, and the high-frequency receiving signals at both ends are small voltage signals with stable waveforms whose peak values E13max are not greater than E2min as shown in Er1 / Er3 in FIG. 4; if the transmitting coils are connected in reverse phase, then Er2=0, and the E2max is shown in FIG. 4 as the fixed receiving signal peak value in the design normal state.

[0109] As shown in the reverse connection fault state of a pair of 8-shaped suspension coil 1 hinge cables 2, Figure 5 the two side transmitting coils are in reverse phase series connection, at this time the induced voltages of the upper coils of the two 8-shaped suspension coils 1 pass through the reversely connected hinge cable 2 to make the phases of the circuit formed by the upper coils the same, and the induced current is generated in the lower coils and makes the high-frequency receiving coil 4 directly below receive the signal Er3=E2max / 2, and Er2=0, which is a fault identification of a mixed connection state.

[0110] As shown in the mixed connection fault state of a pair of 8-shaped suspension coil 1 hinge cables 2, Figure 6The adjacent 8-shaped suspension coil 1 is shown in the mixed connection fault state adjacent to the hinge cable 2, so that the two side transmitting coils are in the opposite phase series state, at this time, the induced current can be induced in the 8-shaped suspension coil 1 corresponding to the non-transmitting coil, so that Er2=Er1<E2max / 4, and Er3=0. This feature can be used as a mixed connection fault identification.

[0111] As shown in the adjacent 8-shaped suspension coil 1, the hinge cable 2 is mixed with each other in the fault state, at this time, the left front side transmitting coil will generate an induced current in the left front + right rear 8-shaped suspension coil 1, and the right front side transmitting coil will generate an induced current in the right front + left rear 8-shaped suspension coil 1, so that the corresponding adjacent two high-frequency receiving coils 4 will obtain the same amplitude receiving signals Er1, Er2, and Er2=Er1<E2max / 2. This feature can be used as the fault identification. Figure 7 According to the cross combination of the connection points of the four pairs of hinge cables 2, there are still other wrong connection faults, which are not listed one by one in this embodiment, according to

[0112] Figure 5 The fault feature analysis result is that when the two groups of 8-shaped suspension coils 1 are mixed with the hinge cable 2, the non-transmitting coil below the transmitting coil will always be in the combination state of the positive and negative connection of the transmitting coil, and as long as the end high-frequency receiving coil 4 receives a receiving signal that is obviously equal to or exceeds the middle high-frequency receiving coil 4, it can be used as the fault criterion for the wrong connection of the hinge cable 2. Figure 6 A fixed transmitting coil series mode is used in the forward inspection, and another reverse fixed series mode is used through the electronic commutator 51 in the reverse inspection, and after the inspection is completed, the fault signal recorded in the forward and reverse directions and the corresponding mileage recorded value of the inspection vehicle can be used to quickly find the wrong connection position and error mode of the hinge cable 2, so as to quickly locate and quickly correct.

[0113] In summary, the present application provides an electric suspension hinge cable 2 connection state inspection device and method, which has the following beneficial effects:

[0114] 1. The two high-frequency transmitting coils 3, the three high-frequency receiving coils 4, the corresponding high-frequency current source 52 and the signal acquisition and processing module 53 are used to form a simple structure with high automation, and all wrong connection states can be checked out by one-way and return inspection, which greatly improves the inspection efficiency compared with manual inspection.

[0115] 2. Different wrong connection, mixed connection and disconnected forms can be identified by the corresponding fault identification state in the two transmitting coil phase modes, and there is a significant difference between the identification signals with and without faults, so that false detection and missed detection do not occur.

[0116]

[0117] ​​The part of the present application not described in detail is the technology known to the person skilled in the art.

[0118] In the description of the present application, it should be understood that the orientation words such as "front, back, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate and imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component itself.

[0119] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial positional relationship of one device or feature with respect to other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the devices described in the drawings. For example, if the devices in the drawings are inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0120] In addition, it should be noted that the use of the words "first", "second" and the like to qualify parts is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, and therefore cannot be understood as a limitation on the scope of protection of the present application.

[0121] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A device for inspecting the cable connection status of an electric suspension hinge, characterized in that: The device includes a mobile device and two high-frequency transmitting coils, three high-frequency receiving coils, an electronic commutator, a high-frequency current source, and a signal acquisition and processing module arranged on the mobile device; The mobile device is used to drive the two high-frequency transmitting coils, the three high-frequency receiving coils, the electronic commutator, the high-frequency current source, and the signal acquisition module to move forward or backward along the propulsion direction of the train; The two high-frequency transmitting coils are disposed on either side of the mobile device along the train's guiding direction; the two high-frequency transmitting coils are connected in series via the electronic commutator; the centroid height of the two high-frequency transmitting coils is the same as the centroid height of the upper coil of the figure-eight suspension coil laid on the track, and the two high-frequency transmitting coils are located at the same guiding distance from the corresponding figure-eight suspension coil; the two high-frequency transmitting coils are used to transmit signals to induce current in a pair of figure-eight suspension coils currently positioned opposite the two high-frequency transmitting coils, wherein the transmitted signal is a high-frequency alternating magnetic field; The high-frequency current source is connected to the electronic commutator, and is used for switching the two high-frequency transmitting coils to the same-phase working state or the opposite-phase working state through the electronic commutator; The three high-frequency receiving coils are arranged at equal intervals on any side of the mobile device along the propulsion direction of the train. The centroid spacing of the three high-frequency receiving coils is the same as the centroid spacing of the lower coils in the figure-8 suspension coil, and the centroid height is the same as the centroid height of the lower coil in the figure-8 suspension coil; the high-frequency receiving coil located in the middle position is directly below the high-frequency transmitting coil on the corresponding side; the three high-frequency receiving coils are used to receive signals and send them to the signal acquisition and processing module, wherein the received signal is the high-frequency voltage induced in the high-frequency receiving coil by the alternating magnetic field generated by the induced current of the figure-8 suspension coil corresponding to each of the three high-frequency receiving coils; The signal acquisition and processing module is connected to the three high-frequency receiving coils and is used to determine whether the connection status of the hinge cable is normal based on the reception signals of the three high-frequency receiving coils; The signal acquisition and processing module is further configured to acquire mileage data of the mobile device and output the mileage data to determine the position of the hinge cable when an abnormality is detected in the connection state of the hinge cable; When the high-frequency current source is commutated by the electronic commutator so that the two high-frequency transmitting coils are switched to the same-phase working state: If the pulsation peak value of the receiving signal of the high-frequency receiving coil at the middle position in the current cycle of the receiving signal is the same as the first preset pulsation peak value, and the pulsation valley value is the same as the first preset pulsation valley value; and the pulsation peak value of the receiving signal of the high-frequency receiving coil at both ends is the same as the second preset pulsation peak value, and the pulsation valley value is the same as the second preset pulsation valley value; then when the receiving signal of the high-frequency receiving coil at the middle position in the current cycle is the pulsation peak value, the corresponding 8-shaped suspension coil hinge cable connection status is normal; wherein, the second preset pulsation peak value is less than or equal to the first preset pulsation valley value; If the pulsation peak value of the receiving signal of the high-frequency receiving coil at the middle position in the current cycle of the receiving signal is less than the first preset pulsation valley value; and the pulsation peak values ​​of the receiving signals of the high-frequency receiving coils at both ends are not greater than the second preset pulsation peak value; then when the receiving signal of the high-frequency receiving coil at the middle position in the current cycle is the pulsation peak value, the corresponding 8-shaped suspension coil hinge cable has a reverse connection fault; If the pulsation peak value of the received signal of the high-frequency receiving coil at the middle position in the current cycle of the received signal is less than half of the first preset pulsation peak value; and one of the pulsation peak values ​​of the received signals of the high-frequency receiving coils at both ends is no greater than the second preset pulsation peak value, and the other is greater than one-quarter of the first preset pulsation peak value; then when the received signal of the high-frequency receiving coil at the middle position in the current cycle is the pulsation peak value, the corresponding 8-shaped suspension coil hinge cable and the adjacent 8-shaped suspension coil hinge cable have a mixed connection fault; If the pulsation peak value of the receiving signal of the high-frequency receiving coil in the middle position in the current cycle of the receiving signal is less than the first preset pulsation valley value; and the pulsation peak value of the receiving signal of the high-frequency receiving coil at both ends is the same as the second preset pulsation peak value, and the pulsation valley value is the same as the second preset pulsation valley value; then when the receiving signal of the high-frequency receiving coil in the middle position in the current cycle is the pulsation peak value, the corresponding 8-shaped suspension coil hinge cable has a disconnection fault.

2. The device according to claim 1, characterized in that When the high-frequency current source is commutated by the electronic commutator so that the two high-frequency transmitting coils are switched to an anti-phase working state: If the pulsation peak value of the receiving signal of the high-frequency receiving coil at the middle position in the current cycle of the receiving signal is the same as the first preset pulsation peak value; and the pulsation peak values ​​of the receiving signals of the high-frequency receiving coils at both ends are not greater than the second preset pulsation peak value; then when the receiving signal of the high-frequency receiving coil at the middle position in the current cycle is the pulsation peak value, the corresponding 8-shaped suspension coil hinge cable has a reverse connection fault; If the receiving signal of any of the high-frequency receiving coils suddenly changes from 0 to an amplitude exceeding one-quarter of the first preset pulsation peak value, the 8-shaped suspension coil hinge cable corresponding to the high-frequency receiving coil with the sudden receiving signal has a mixed connection fault with the adjacent 8-shaped suspension coil hinge cable.

3. The device according to claim 1, characterized in that The frequency range of the transmission signal is 1kHz~100kHz.

4. The device according to claim 3, characterized in that The ratio of the operating speed of the mobile device to the distance between two adjacent figure-8 suspension coils is two orders of magnitude smaller than the frequency of the transmission signal.

5. The device according to claim 1, characterized in that The mobile equipment is an inspection vehicle.

6. A method for inspecting the cable connection status of an electric suspension hinge, characterized in that: The method uses the device according to any one of claims 1 to 5 to inspect the connection status of the hinge cable, and the method includes: The mobile device drives the inspection device to move forward from the detection starting point along the train propulsion direction. At the same time, the high-frequency current source passes through the electronic commutator to switch the two high-frequency transmitting coils to the same-phase working state; The two high-frequency transmitting coils emit a high-frequency alternating magnetic field, so that a pair of 8-shaped suspension coils currently positioned opposite to the two high-frequency transmitting coils generate an induced current; The three high-frequency receiving coils receive the alternating magnetic field generated by the induced current of the corresponding 8-shaped suspension coils and send it to the signal acquisition and processing module; The signal acquisition and processing module determines whether the connection status of the hinge cable is normal based on the receiving signals of the three high-frequency receiving coils; When the inspection device moves to the detection end point, the mobile device drives the inspection device to move in the opposite direction from the detection end point along the train propulsion direction. At the same time, the high-frequency current source switches the two high-frequency transmitting coils to the anti-phase working state through the electronic commutator; The two high-frequency transmitting coils emit a high-frequency alternating magnetic field, so that a pair of 8-shaped suspension coils currently positioned opposite to the two high-frequency transmitting coils generate an induced current; The three high-frequency receiving coils receive the alternating magnetic field generated by the induced current of the corresponding 8-shaped suspension coils and send it to the signal acquisition and processing module; The signal acquisition and processing module determines whether the connection status of the hinge cable is normal based on the receiving signals of the three high-frequency receiving coils; When the inspection device returns to the inspection starting point again, the inspection of the hinge cable of the current section is completed.

7. The method according to claim 6, characterized in that The method further includes outputting mileage data to determine a position of the hinge cable when an abnormality is detected in the connection state of the hinge cable.

8. The method according to claim 6 or 7, characterized in that When the mobile device drives the inspection device to move forward from the inspection starting point along the train propulsion direction, the signal acquisition and processing module determines whether the connection status of the hinge cable is normal based on the received signals of the three high-frequency receiving coils, including: If the pulsation peak value of the receiving signal of the high-frequency receiving coil at the middle position in the current cycle of the receiving signal is the same as the first preset pulsation peak value, and the pulsation valley value is the same as the first preset pulsation valley value; and the pulsation peak value of the receiving signal of the high-frequency receiving coil at both ends is the same as the second preset pulsation peak value, and the pulsation valley value is the same as the second preset pulsation valley value; then when the receiving signal of the high-frequency receiving coil at the middle position in the current cycle is the pulsation peak value, the corresponding 8-shaped suspension coil hinge cable connection status is normal; wherein, the second preset pulsation peak value is less than or equal to the first preset pulsation valley value; If the pulsation peak value of the receiving signal of the high-frequency receiving coil at the middle position in the current cycle of the receiving signal is less than the first preset pulsation valley value; and the pulsation peak values ​​of the receiving signals of the high-frequency receiving coils at both ends are not greater than the second preset pulsation peak value; then when the receiving signal of the high-frequency receiving coil at the middle position in the current cycle is the pulsation peak value, the corresponding 8-shaped suspension coil hinge cable has a reverse connection fault; If the pulsation peak value of the received signal of the high-frequency receiving coil at the middle position in the current cycle of the received signal is less than half of the first preset pulsation peak value; and one of the pulsation peak values ​​of the received signals of the high-frequency receiving coils at both ends is no greater than the second preset pulsation peak value, and the other is greater than one-quarter of the first preset pulsation peak value; then when the received signal of the high-frequency receiving coil at the middle position in the current cycle is the pulsation peak value, the corresponding 8-shaped suspension coil hinge cable and the adjacent 8-shaped suspension coil hinge cable have a mixed connection fault; If the pulsation peak value of the receiving signal of the high-frequency receiving coil in the middle position in the current cycle of the receiving signal is less than the first preset pulsation valley value; and the pulsation peak value of the receiving signal of the high-frequency receiving coil at both ends is the same as the second preset pulsation peak value, and the pulsation valley value is the same as the second preset pulsation valley value; then when the receiving signal of the high-frequency receiving coil in the middle position in the current cycle is the pulsation peak value, the corresponding 8-shaped suspension coil hinge cable has a disconnection fault.

9. The method according to claim 6 or 7, characterized in that When the mobile device drives the inspection device to move in the opposite direction from the inspection end point along the train propulsion direction, the signal acquisition and processing module determines whether the connection status of the hinge cable is normal based on the received signals of the three high-frequency receiving coils, including: If the pulsation peak value of the receiving signal of the high-frequency receiving coil at the middle position in the current cycle of the receiving signal is the same as the first preset pulsation peak value; and the pulsation peak values ​​of the receiving signals of the high-frequency receiving coils at both ends are not greater than the second preset pulsation peak value; then when the receiving signal of the high-frequency receiving coil at the middle position in the current cycle is the pulsation peak value, the corresponding 8-shaped suspension coil hinge cable has a reverse connection fault; If the receiving signal of any of the high-frequency receiving coils suddenly changes from 0 to an amplitude exceeding one-quarter of the first preset pulsation peak value, the 8-shaped suspension coil hinge cable corresponding to the high-frequency receiving coil with the sudden receiving signal has a mixed connection fault with the adjacent 8-shaped suspension coil hinge cable.

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