Mileage sensing system and pipeline detector

Abstract

The present application relates to a mileage sensing system and pipeline detector. The system includes at least one mileage acquisition system; each mileage acquisition system includes an mileage wheel; and two sensor assemblies corresponding to the mileage wheel; each sensor assembly includes a sensor for sensing the rotation information of the mileage wheel and generating a pulse signal based on the rotation information; wherein, when the mileage wheel rotates one circle, the first number and the second number are different; the first number is the number of first pulse signals, and the second number is the number of second pulse signals, and the first pulse signal and the second pulse signal are respectively two pulse signals generated by the two sensors included in the two sensor assemblies. In the above scheme, by providing two sensors, the positioning and measurement of pipeline defects are separated, thereby providing accurate pipeline defect positioning information.

Description

Technical Field

[0001] The present application relates to the technical field of in-pipeline detection, and in particular to a mileage sensing system and a pipeline detector. Background Art

[0002] In recent years, with the rapid development of my country's national economy, society's demand for energy, especially oil and gas resources, has also increased simultaneously. Pipeline transportation is a relatively important way to transport oil and gas resources. When using pipelines to transport oil and gas resources, it is necessary to set up pipeline detectors to detect the status of the pipeline, such as whether there are defects in the pipeline, and to locate and measure the detected defects.

[0003] The pipeline detector uses its internal mileage sensor system to locate and measure defects detected by the main sensor. The mileage sensor system collects information about the rotation of the mileage wheel and generates a pulse signal based on this information. The accuracy of the pulse signal is crucial, as it has a direct impact on the accuracy of locating and measuring pipeline defects. However, in actual applications, pipeline detectors are inevitably subject to frequent starts and stops for various reasons. When the pipeline detector stops, especially in pipelines carrying gas media, the driving pressure differential of the pipeline detector increases rapidly, causing the pipeline detector to run at an excessively fast speed after startup. In this case, the detector needs to be able to quickly collect data. However, the data acquisition speed of current detectors generally cannot meet this requirement, which inevitably leads to excessive errors in the pulse signals provided by the mileage sensor system to the pipeline detector, which in turn leads to a significant decrease in the accuracy of locating pipeline defects. Summary of the Invention

[0004] The present application provides a mileage sensing system and a pipeline detector to solve the problem of low positioning accuracy of pipeline defects in traditional mileage sensing systems.

[0005] To this end, this application provides the following technical solutions:

[0006] In a first aspect, the present application provides a mileage sensing system, comprising: at least one mileage collection system; each mileage collection system comprises: an mileage wheel; and two groups of sensor assemblies corresponding to the mileage wheel; each group of sensor assemblies comprises a sensor, the sensor being used to sense the rotation information of the mileage wheel and generate a pulse signal based on the rotation information; wherein, when the mileage wheel rotates one circle, the first number and the second number are different; the first number is the number of first pulse signals, the second number is the number of second pulse signals, and the first pulse signal and the second pulse signal are respectively two pulse signals generated by the two sensors included in the two groups of sensor assemblies.

[0007] Optionally, the sensor is a Hall effect gear speed sensor; accordingly, the sensor assembly further includes: a sensor target wheel; the sensor target wheel is coaxially arranged with the mileage wheel; the Hall effect gear speed sensor and the sensor target wheel are non-contact arranged.

[0008] Optionally, the sensor is a magnetic rotary code disk speed sensor; accordingly, the sensor assembly further includes: a permanent magnet; the permanent magnet is arranged at the axis center of the side of the mileage wheel; the magnetic rotary code disk speed sensor is arranged on the side and surrounds the permanent magnet.

[0009] Optionally, the two sensors included in the two groups of sensor assemblies are both Hall effect gear speed sensors; or, the two sensors included in the two groups of sensor assemblies are both magnetic rotary code disk speed sensors; or, the two sensors included in the two groups of sensor assemblies are respectively a Hall effect gear speed sensor and a magnetic rotary code disk speed sensor.

[0010] Optionally, the first number is 1, 2, or 4; and / or the second number is 72.

[0011] Optionally, there are multiple groups of mileage collection systems; accordingly, the mileage sensing system also includes: a mileage optimization system; multiple groups of mileage collection systems are connected to the mileage optimization system; the mileage optimization system is used to select one group from the multiple groups of mileage collection systems, and output the pulse signal generated by the selected group of mileage collection systems to the main system.

[0012] Optionally, the mileage selection system is specifically used to: receive two pulse signals generated by each group of mileage collection systems; perform self-inspection on each group of mileage collection systems based on the ratio of the number of the two pulse signals; and select a group of mileage collection systems from the mileage collection systems that self-inspect normally.

[0013] Optionally, the mileage optimization system includes: multiple interface circuits, each interface circuit is connected to a group of mileage collection systems, and is used to convert the two pulse signals generated by the mileage collection system into two TTL signals; a mileage optimization chip is connected to the multiple interface circuits, and is used to select the multiple groups of mileage collection systems according to the two TTL signals corresponding to each mileage collection system; an output circuit includes two output ends, both of which are connected to the mileage optimization chip, and are used to output the two TTL signals corresponding to the selected group of mileage collection systems.

[0014] Optionally, the mileage collection system consists of three groups.

[0015] In a second aspect, the present application further provides a pipeline detector comprising the mileage sensor system described in any one of the first aspects.

[0016] The technical solutions provided by the embodiments of the present application may have the following beneficial effects:

[0017] Unlike traditional mileage sensing systems in which each mileage wheel corresponds to only one sensor, the mileage sensing system provided in this application corresponds to two sensors for each mileage wheel, thereby separating the positioning and measurement of defects, thereby ensuring positioning accuracy and measurement accuracy when the pipeline detector runs at a faster speed.

[0018] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0020] Figure 1 This is a schematic diagram of the overall structure of a mileage sensing system shown in this application;

[0021] Figure 2 This is a schematic structural diagram of a first target wheel shown in this application;

[0022] Figure 3 This is a schematic structural diagram of a second target wheel shown in this application;

[0023] Figure 4 This is a schematic diagram of the front structure of a magnetic rotation sensor shown in this application

[0024] Figure 5 Schematic diagram of the magnetic column structure on the side of the magnetic rotation sensor;

[0025] Figure 6 This is a schematic diagram of a pulse signal output by a sensor assembly according to an embodiment of the present application;

[0026] Figure 7 A flow chart of a preferred pulse determination method shown in an embodiment of the present application. DETAILED DESCRIPTION

[0027] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0028] Existing mileage sensing systems primarily consist of an mileage wheel, sensors, interface circuits, and an optimization algorithm core chip. Their principle is this: a pipeline detector moves with the flow of fluid within the pipeline. The detector's main sensor detects defects within the pipeline. When a defect is present, the data detected by the main sensor deviates, thus detecting the defect. As the pipeline detector moves, the mileage wheel rotates. The mileage sensing system's sensors detect this rotation and generate a corresponding pulse signal, which is then used to locate and measure the defect. In existing technology, pipeline defect location and measurement are typically performed by a single sensor.

[0029] In oil and gas pipeline inspections, liquid media have a low compression ratio and minimal pressure differential, allowing pipeline detectors to operate relatively smoothly. Existing mileage sensing systems provide pulse signal errors within acceptable limits. However, in gas pipelines, the compression ratio is high and the pressure differential fluctuates significantly, making smooth operation difficult. Consequently, detectors frequently start and stop. When a pipeline detector stops, the driving pressure differential increases rapidly, causing it to operate at excessively high speeds, such as over 5 meters per second or even tens of meters per second. This requires the detector to acquire data quickly. To meet these operating speeds, the detector's data acquisition speed must be around 2.5 to 30 kilobytes (K). However, current detector data acquisition speeds typically range from 1 to 10 K, which is insufficient for this requirement. This inevitably results in significant errors in the pulse signals provided by the mileage sensing system, significantly reducing the accuracy of pipeline defect location and measurement.

[0030] Therefore, in order to solve the above problems, the present application provides a mileage sensing system that provides dual-channel sensing information for pipeline detectors, one channel is used for data collection as data for pipeline defect measurement, and the other channel is used for mileage recording as data for pipeline defect positioning.

[0031] The specific scheme is described in detail below through examples.

[0032] Example

[0033] An embodiment of the present application provides a mileage sensing system, which includes: at least one mileage collection system, each mileage collection system including: an mileage wheel; and two groups of sensor assemblies arranged corresponding to the mileage wheel; each group of sensor assemblies includes a sensor, and the sensor is used to sense the rotation information of the mileage wheel and generate a pulse signal based on the rotation information; wherein, when the mileage wheel rotates one circle, the first number and the second number are different; the first number is the number of first pulse signals, and the second number is the number of second pulse signals, and the first pulse signal and the second pulse signal are respectively two pulse signals generated by the two sensors included in the two groups of sensor assemblies.

[0034] The two sensors included in the two sensor assemblies can be of the same or different types. For example, the two sensors included in the two sensor assemblies can both be Hall-effect gear speed sensors; or the two sensors included in the two sensor assemblies can both be magnetic rotary code disk speed sensors; or the two sensors included in the two sensor assemblies can each be a Hall-effect gear speed sensor and a magnetic rotary code disk speed sensor.

[0035] Depending on the sensor type, the sensor assembly may include different components. For example, if the sensor is a Hall-effect gear speed sensor, the sensor assembly also includes a sensor target wheel. The sensor target wheel is coaxially arranged with the odometer wheel; the Hall-effect gear speed sensor is non-contacted with the sensor target wheel. If the sensor is a magnetic rotary code disk speed sensor, the sensor assembly also includes a permanent magnet. The permanent magnet is arranged at the axis of a side surface of the odometer wheel; the magnetic rotary code disk speed sensor is arranged on the side surface and surrounds the permanent magnet.

[0036] It is understood that sensor types are not limited to the two described above and can also include other types. One key aspect of the mileage sensing system provided herein is that each mileage wheel is equipped with two sensors. This allows pipeline defects to be located based on the pulse signal generated by one sensor and measured based on the pulse signal generated by the other sensor, achieving the separation of positioning and measurement. To improve measurement accuracy, the pulse signal corresponding to measurement can be configured to have a shorter period. That is, for each rotation of the mileage wheel, a greater number of pulse signals corresponding to measurement are generated. This allows for more data to be collected, thereby improving measurement accuracy. To improve positioning accuracy, the pulse signal corresponding to positioning can be configured to have a longer period. That is, for each rotation of the mileage wheel, a smaller number of pulse signals corresponding to positioning are generated. This longer period ensures data collection even when the pipeline detector is operating rapidly. (If a pulse signal with a shorter period, such as that corresponding to measurement, were used, data might not be collected in time during rapid operation, resulting in data loss.) This improves positioning accuracy.

[0037] The following describes the mileage sensing system using a Hall effect gear speed sensor and a magnetic rotary encoder speed sensor as examples.

[0038] Reference Figure 1 , Figure 1 This is a schematic diagram of the overall structure of a mileage sensing system shown in this application. This embodiment is described by taking a Hall effect gear speed sensor as an example.

[0039] In this embodiment, the mileage sensing system includes three groups of mileage collection systems as an example for description.

[0040] like Figure 1 As shown, the mileage sensing system includes three mileage collection systems 1 , each mileage collection system 1 includes an mileage wheel 11 and two sensor components, each sensor component includes a sensor target wheel 12 and a Hall effect gear speed sensor 13 .

[0041] like Figure 1 As shown, two sensor target wheels 12 are coaxially arranged with the corresponding odometer wheels 11 , and the Hall effect gear speed sensor 13 is non-contactly arranged with the sensor target wheels 12 .

[0042] In some embodiments, such as Figure 1 As shown, the mileage sensing system may further include: a mileage optimization system 2. Multiple groups of mileage collection systems 1 are connected to the mileage optimization system 2;

[0043] The mileage optimization system 2 is used to select one group from multiple groups of mileage collection systems 1 and output the pulse signal generated by the selected group of mileage collection systems to the main system (not shown in the figure).

[0044] like Figure 1 As shown, the mileage optimization system 2 includes: an interface circuit 21, a mileage optimization chip 22 and an output circuit 23. The output circuit 23 includes two output terminals. Figure 1 In the figure, the two output terminals are represented by the acquisition pulse output terminal and the mileage pulse output terminal respectively.

[0045] There are multiple interface circuits 21, each of which is connected to a group of mileage collection systems. Figure 1 The system includes three interface circuits, each connected to one of the three mileage collection systems. Since each mileage collection system includes two sensors, each interface circuit connects to the two sensors of the corresponding mileage collection system and receives two pulse signals generated by the two sensors. Interface circuit 21 converts the pulse signals into transistor-transistor logic (TTL) signals recognizable by the mileage optimization chip and outputs them to the mileage optimization chip 22.

[0046] The mileage selection chip 22 is used to select the TTL signal corresponding to one group of mileage collection systems from multiple groups of mileage collection systems, and output it to the subsequent main system through the output circuit. For example, Figure 1 The three groups of mileage collection systems are respectively called the first group of mileage collection systems, the second group of mileage collection systems and the third group of mileage collection systems. Assuming that the mileage optimization chip determines to select the first group of mileage collection systems after calculation, the TTL signals corresponding to the two pulse signals generated by the first group of mileage collection systems are output to the main system through the output circuit.

[0047] The output circuit 23 includes two output terminals, each for outputting a TTL signal corresponding to a pulse signal. For example, the two pulse signals generated by two sensors in a mileage acquisition system are called the first pulse signal and the second pulse signal, respectively. Assuming the first pulse signal is used for positioning and the second pulse signal is used for measurement, the acquisition pulse output terminal in the output circuit is used to output the TTL signal corresponding to the second pulse signal, and the mileage pulse output terminal in the output circuit is used to output the TTL signal corresponding to the first pulse signal.

[0048] One of the main improvements of this application is the provision of two target wheels and corresponding sensors (in the prior art, only one target wheel and one sensor are provided), so that the two sensors can respectively provide acquisition pulses (which can be used as defect measurement data) and mileage pulses (which can be used as defect location data).

[0049] The structures of the two target wheels are described in detail below.

[0050] Assume that the sensor assembly providing data for positioning is the first sensor assembly, and the sensor assembly providing data for measurement is the second sensor assembly. Accordingly, the first sensor assembly includes a first target wheel and a first sensor, and the second sensor assembly includes a second target wheel and a second sensor.

[0051] Reference Figure 2 , Figure 2 This is a schematic diagram of the structure of a first target wheel shown in this application. Take the first pulse signal generated by the first sensor as an example, when the mileage wheel rotates one circle, the first number generated is 4. Figure 2 As shown, the structure of the first target wheel is as follows: the circular plane of the first target wheel is divided into four right-angle sectors by two mutually perpendicular diameters, and the materials of two adjacent right-angle sectors are different, and the materials of two opposite right-angle sectors are the same, wherein the two different materials are respectively a magnetic conductive material and a non-magnetic conductive material (for example, Figure 2 The shaded area in the middle is a non-magnetic material). The magnetic material can be No. 10 carbon steel or similar materials. It is understandable that the first number is not limited to the above 4, as long as it is a relatively small number, for example, it can also be 2. Correspondingly, when the number is different, the structure of the first target wheel also needs to be adaptively modified. For example, when the first number is 2, the first target wheel can be divided into 2 parts as a whole, instead of Figure 2 Of the four parts shown, two parts are made of magnetic conductive material and two are made of non-magnetic conductive material.

[0052] Reference Figure 3 , Figure 3 This is a schematic diagram of the structure of a second target wheel shown in this application. Figure 3 As shown, the structure of the second target wheel is as follows: the second target wheel is made of magnetic conductive material as a whole, and non-magnetic conductive material ( Figure 3 Similarly, the magnetic conductive material can be No. 10 carbon steel. It should be noted that the structure of the second target wheel is basically the same as that of the target wheel in the existing mileage sensor system. In other words, the second target wheel does not need to be improved and can be directly used as the existing target wheel.

[0053] The above description uses a Hall effect gear speed sensor as an example. The sensor may also be a magnetic rotary code disk speed sensor.

[0054] Reference Figure 4 and Figure 5 ,in, Figure 4 This is a schematic structural diagram of the front side of a magnetic rotation sensor shown in this application. Figure 5 Figure 1 is a schematic diagram of the magnetic column structure on the side of the magnetic rotation sensor. Figure 4 and Figure 5As shown, a set of magnetic rotation sensors includes: an odometer wheel 11 and two sets of sensor assemblies, each set of sensor assemblies includes a permanent magnet 14 and a magnetic rotary code disk speed sensor 15. The permanent magnet 14 is set at the axis center of the side of the odometer wheel; the magnetic rotary code disk speed sensor 15 is set on the side of the odometer wheel and surrounds the permanent magnet.

[0055] It is understood that the magnetic rotation sensor may include other components, such as Figure 4 and Figure 5 Also shown is a trip wheel support arm 16, the structure and installation method of which can be realized by using existing technology. The trip wheel support arm also exists in the system of the Hall effect gear speed sensor.

[0056] Although the working principles of the Hall effect gear speed sensor and the magnetic rotary code disk speed sensor are different (their working principles can be referred to the existing technology and will not be described in detail in this application), after the above-mentioned installation structure is applied to this application, the overall principle is basically the same, that is, two sensors are set for each odometer wheel to provide positioning data and measurement data respectively.

[0057] In addition, combined Figure 6 , some principles of the mileage sensing system described in this application are explained. Figure 6 This is a schematic diagram of the pulse signal output by the sensor component shown in the embodiment of the present application, as shown in FIG. Figure 6 As shown, the first pulse signal output by the first sensor is recorded as PulseA, which is used as the mileage recording pulse output, and the second pulse signal output by the second sensor is recorded as PulseB, which is used as the acquisition pulse output. When the mileage wheel rotates one circle, the first sensor only sends one first pulse signal. When the mileage wheel rotates one circle, the second sensor sends multiple second pulse signals. For example Figure 6 Of course, it should be understood that the number of first and second pulse signals is not limited to 1 or 72 as described above. Depending on the selected sensor, the number of generated pulses can vary. In principle, the first number of the first pulse signal is much smaller than the number of the second pulse signal.

[0058] The technical solutions provided by the above embodiments of the present application may have the following beneficial effects:

[0059] An embodiment of the present application provides an odometer sensing system comprising an odometer wheel and a sensor assembly. Each odometer wheel corresponds to two sensors: one for outputting odometer pulses and the other for outputting acquisition pulses, respectively used for locating and measuring pipeline defects. In other words, an additional sensor is added to a traditional odometer sensor system, separating the locating and measuring functions of pipeline defects. This allows accurate pipeline defect location information to be provided even when the pipeline detector is operating at excessive speeds.

[0060] On the basis of the above solution, since the various structures of the system, especially electronic components such as sensor components, are inevitably damaged during use, the present application also makes the following improvements to the above solution:

[0061] In some embodiments, the mileage collection system is a plurality of groups (for example, Figure 1 As shown, there are three groups of mileage collection systems), and the mileage selection system is used to: receive two pulse signals generated by each group of mileage collection systems; perform self-tests on each group of mileage collection systems based on the ratio of the number of the two pulse signals; and select one group of mileage collection systems from the mileage collection systems that have self-tested normally.

[0062] That is to say, first of all, based on the design of dual-channel sensors, because the output pulse ratio of the two sensors is fixed, it is possible to detect whether the physical properties of the sensor itself are damaged, and damaged sensors can be eliminated in the system in a timely manner, thereby improving the reliability and applicability of the pipeline detector in pipeline detection operations.

[0063] Specifically, Figure 6 For example, if the ratio of the pulses output by the first and second sensors is 1:72, if the pulse ratio collected in actual use differs significantly from this 1:72 ratio, it can be determined that the corresponding sensor component (the first or second sensor) is operating abnormally and may be damaged. The user can then conduct appropriate troubleshooting, discard the potentially damaged sensor component, and choose from the remaining sensor components.

[0064] For example, there are three groups of mileage collection systems: the first, second, and third groups. After receiving pulse signals from these three groups, the mileage selection system first performs a self-test on each group. For example, for each group, the system determines the ratio of the number of first pulse signals to the number of second pulse signals when the odometer wheel rotates a set number of revolutions (e.g., one revolution). Assuming the ratio is set to 1:72, if the ratio meets this requirement, the mileage collection system is normal; otherwise, it is abnormal. Assuming that after the self-test, the second and third groups of mileage collection systems are normal, a selection is made between the second and third groups. The mileage collection system with the fastest acquisition speed is prioritized. Specifically, if the pulse signals corresponding to positioning and measurement are the first and second pulse signals, respectively, the selection is made based on the second pulse signal. For example, if the number of second pulse signals from the second group of mileage collection systems is greater than the number of second pulse signals from the third group of mileage collection systems within the same timeframe, the second group of mileage collection systems is selected.

[0065] After completing the selection, the mileage optimization system outputs through the output circuit. For example, if the second group of mileage collection systems is selected, the TTL signal corresponding to the second pulse signal of the second group of mileage collection systems is output through the collection pulse output end, and the TTL signal corresponding to the first pulse signal of the second group of mileage collection systems is output through the mileage pulse output end.

[0066] For better explanation, refer to Figure 7 , Figure 7 A flow chart of a preferred pulse determination method shown in an embodiment of the present application. Figure 7 In the figure, the number of odometer wheel assemblies and sensor assemblies is 3 groups as an example, and Pulse1A represents the first pulse signal output by the first sensor in the first group of sensor assemblies, and Pulse1B represents the second pulse signal output by the second sensor in the first group of sensor assemblies; similarly, Pulse2A represents the first pulse signal output by the first sensor in the second group of sensor assemblies, and Pulse2B represents the second pulse signal output by the second sensor in the second group of sensor assemblies, and so on.

[0067] The specific process is as follows: at the beginning, Pulse1B is used as the preferred pulse;

[0068] Then, the three pulse groups Pulse1A, Pulse2A, and Pulse3A are counted separately at a 500kHz reference, and the count N is filtered for noise.

[0069] Based on the set comparison count value, the comparison count value decreases by 1 every time the odometer wheel rotates;

[0070] Until the comparison count value reaches 0, compare the count values ​​of Pulse1A, Pulse2A, and Pulse3A;

[0071] If the count value of Pulse1A is the smallest for four consecutive times, Pulse1B output by the second sensor in the first group of sensor components is used as the preferred pulse output;

[0072] If the count value of Pulse2A is the smallest for four consecutive times, Pulse2B output by the second sensor in the second group of sensor assemblies is used as the preferred pulse output;

[0073] If the count value of Pulse3A is the smallest for four consecutive times, Pulse3B output by the second sensor in the third sensor assembly is used as the preferred pulse output;

[0074] If it is other cases, the initially selected Pulse1B continues to be used as the preferred pulse output.

[0075] It is understandable that Figure 7 The specific values ​​shown are only examples, and other values ​​may be selected depending on the actual scenario.

[0076] It should be understood that the above method is only a feasible solution proposed in the embodiment of the present application and cannot be regarded as a limitation of the present application. In actual application, other methods can also be used to determine the sensor component with the best output result.

[0077] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0078] It should be noted that, in the description of this application, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "plurality" refers to at least two.

[0079] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present application belong.

[0080] It should be understood that various parts of the present application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used to implement: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0081] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

[0082] In addition, the functional units in the various embodiments of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into a module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0083] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0084] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0085] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A mileage sensing system, characterized in that: include: At least one mileage collection system; Each mileage collection system includes: a mileage wheel; and, Two sets of sensor assemblies are arranged corresponding to the one odometer wheel; Each sensor assembly includes a sensor configured to sense rotation information of the odometer wheel and generate a pulse signal according to the rotation information; wherein, when the odometer wheel rotates one revolution, the first number and the second number are different; The first number is the number of first pulse signals, and the second number is the number of second pulse signals. The first pulse signal and the second pulse signal are two pulse signals generated by the two sensors included in the two groups of sensor components.

2. The system according to claim 1, wherein: The sensor is a Hall effect gear speed sensor; Accordingly, the sensor assembly further comprises: a sensor target wheel; The sensor target wheel is coaxially arranged with the mileage wheel; The Hall effect gear speed sensor is arranged in a non-contact manner with the sensor target wheel.

3. The system according to claim 1, wherein: The sensor is a magnetic rotary code disk speed sensor; Accordingly, the sensor assembly further comprises: a permanent magnet; The permanent magnet is arranged at the axis center of the side surface of the mileage wheel; The magnetic rotary code disk speed sensor is disposed on the side surface and surrounds the permanent magnet.

4. The system according to claim 1, wherein: The two sensor assemblies comprise two sensors: both are Hall effect gear speed sensors; or, The two sensor assemblies comprise two sensors: both are magnetic rotary code disk speed sensors; or, The two sensor groups include two sensors: a Hall effect gear speed sensor and a magnetic rotary code disk speed sensor.

5. The system according to claim 1, wherein: The first number is 1, 2, or 4; and / or, The second number is 72.

6. The system according to any one of claims 1 to 5, characterized in that: The mileage collection system is multiple groups; Accordingly, the mileage sensing system further includes: a mileage optimization system; Multiple mileage collection systems are connected to the mileage optimization system; The mileage selection system is used to select one group from the multiple groups of mileage collection systems and output the pulse signal generated by the selected group of mileage collection systems to the main system.

7. The system according to claim 6, characterized in that The mileage optimization system is specifically used for: Receive two pulse signals generated by each group of mileage collection systems; Performing self-test on each group of mileage collection systems based on the ratio of the number of the two pulse signals; Among the mileage collection systems that have self-checked normally, select a group of mileage collection systems.

8. The system according to claim 6, wherein: The mileage optimization system includes: A plurality of interface circuits, each interface circuit being connected to a set of mileage collection systems and configured to convert two pulse signals generated by the mileage collection systems into two TTL signals; a mileage selection chip connected to the plurality of interface circuits and configured to select the plurality of mileage collection systems according to the two TTL signals corresponding to the respective mileage collection systems; The output circuit includes two output terminals, both of which are connected to the mileage optimization chip and are used to output two TTL signals corresponding to a selected group of mileage collection systems.

9. The system according to claim 6, wherein: The mileage collection system consists of three groups.

10. A pipeline detector, characterized in that: include: The mileage sensing system according to any one of claims 1 to 9.

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