Method and device for identifying operation state of sensor system, electronic equipment and computer readable medium

Abstract

The invention discloses a method and device for identifying the running state of a sensor system, electronic equipment and a computer readable medium. The method comprises the following steps: aiming at each sensor in a plurality of resistance strain type sensors cooperating with each other of the sensor system; periodically acquiring an output voltage of the sensor within each of a plurality of sub-intervals divided from the one or more identification intervals (S201); checking whether the sensor should be in operation (S202); and if the sensor is to be in operation, identifying the actual operating state of the sensor by means of the output voltage (S203), by means of which method the abnormal operating state of the individual sensor in the sensor system can be easily identified.

Description

Method, device, electronic device, and computer-readable medium for identifying an operating state of a sensor system Technical Field

[0001] The present invention relates to the field of sensors, and in particular to a method, a device, an electronic device and a computer-readable medium for identifying the operating status of a sensor system. Background Art

[0002] A resistance strain sensor is a resistive sensor that uses a resistance strain gauge as a conversion element. The resistance strain gauge converts its own deformation into a change in resistance, and further converts the resistance change into an electrical signal, such as voltage, through a corresponding measurement circuit. This allows the measurement of various physical quantities such as force, pressure, torque, displacement, acceleration, and temperature.

[0003] A typical example of a resistive strain gauge sensor is a load cell, which is commonly used in vehicles, particularly trucks. Multiple load cells are installed between the cargo container and the chassis longitudinal beams. The container weight or vehicle payload is determined by summing the measurement results from these load cells. During vehicle use, a load cell may experience an abnormal operating state due to a malfunction. This abnormal operating state must be identified immediately to prevent erroneous vehicle mass from affecting the performance of the vehicle's electronic control systems, particularly. However, current methods for identifying sensor operating states are performed offline, requiring testing only when the vehicle is not in motion, or even after the load cell has been removed.

[0004] In addition, the current method for identifying the operating status of a sensor is only implemented for a single sensor. For a sensor system composed of multiple weighing sensors that cooperate with each other, it is also necessary to check whether the single sensor is loaded before identifying it.

[0005] Therefore, a method for identifying an abnormal operating state of a single sensor in a sensor system in a non-offline manner is needed.

[0006] Summary of the Invention

[0007] In view of this, embodiments of the present invention provide a method and apparatus for identifying the operating status of a sensor system, which can simply identify the abnormal operating status of a single sensor in the sensor system.

[0008] To achieve the above object, according to one aspect of an embodiment of the present invention, a method for identifying the operating status of a sensor system is provided, characterized in that it includes the following steps:

[0009] For each of a plurality of resistive strain sensors cooperating with each other in the sensor system:

[0010] Periodically sampling the output voltage of the sensor within each of a plurality of subintervals divided from one or more identification intervals;

[0011] checking whether the sensor should be in operation; and

[0012] If the sensor is to be in operation, the actual operating state of the sensor is detected via the output voltage.

[0013] The technical advantage of the method according to the present invention is that it can identify the operating status of a sensor system, particularly abnormal operating conditions of a single resistive strain gauge sensor in a sensor system, without requiring additional detection equipment and solely utilizing the output voltage of the resistive strain gauge sensor itself. Furthermore, the technical advantage of the method according to the present invention is that the identification process is performed while the sensor system is operating, rather than requiring offline execution as in the prior art.

[0014] Examples of resistive strain sensors are torque sensors, pressure sensors, force sensors and load cells.

[0015] For the purposes of this invention, "multiple cooperating resistive strain gauge sensors" means that the measured values ​​of these sensors are correlated and collectively constitute the final measured value. For example, a sensor system consisting of multiple load cells in a truck can measure the weight of a truck independently. By summing the results of these load cells, the total mass applied to the sensor system—i.e., the weight of the container or the vehicle's payload—can be determined.

[0016] Within the scope of the present invention, "a sensor should be in operation" means that a change in the measured physical quantity causes a load on the sensor. According to the present invention, a check is first performed to determine whether each sensor in the sensor system should be in operation, because only when a sensor is in operation is it meaningful to identify its operating state.

[0017] In a preferred embodiment, the actual operating state of the sensor is determined by determining a subinterval within a time period in which the output voltage falls within the abnormal voltage range more than a threshold number of acquisitions as an abnormal subinterval. If the number of abnormal subintervals within an identified interval exceeds the threshold number of subintervals, the sensor is identified as being in an abnormal operating state; otherwise, the sensor is identified as being in a normal operating state. Thus, the operating state of each sensor can be identified based on the output voltage's behavior over both short and long time periods.

[0018] Within the scope of the present invention, "abnormal voltage range" means the output voltage range of the resistive strain sensor in abnormal operation. The "identification interval" of the present invention includes multiple "sub-intervals", and the "sub-interval" includes multiple acquisition cycles, so the "sub-interval" means a relatively short time period, and the "identification interval" means a relatively long time period. "The number of times the output voltage is within the abnormal voltage range within a sub-interval exceeds the acquisition quantity threshold" means that abnormal operation acquisition points frequently appear in a short period of time, and such sub-intervals are determined as abnormal sub-intervals, thereby avoiding erroneous identification caused by transient interference. "Within an identification interval, the number of abnormal sub-intervals exceeds the sub-interval quantity threshold" means that abnormal sub-intervals frequently appear over a long period of time, and such a situation is determined as an abnormal operating state, thereby avoiding erroneous identification caused by temporary interference. Those skilled in the art can appropriately set the acquisition quantity threshold and the sub-interval quantity threshold according to the performance parameters of the resistive strain sensor.

[0019] In a preferred embodiment, the system checks whether individual sensors are in operation only when the sum of the output voltages of all sensors in the sensor system is greater than or equal to a total operating voltage threshold. When the sensor system is in operation, at least one sensor is loaded, so the sum of the output voltages of all sensors must be greater than a certain voltage threshold. The value of this voltage threshold depends on the performance parameters of each sensor, such as zero drift or measurement noise. Those skilled in the art can appropriately set the total operating voltage threshold for checking whether the sensor system is loaded, depending on the actual sensor system used. This reduces computational overhead because the operating status of each sensor is only determined when the sensor system is loaded.

[0020] In a preferred embodiment, the sensor system includes at least three resistance strain gauge sensors, and a sensor is identified as being in operation when the output voltages of two adjacent sensors are both greater than or equal to a first operating voltage threshold. Thus, even if it is not possible to check the output voltages of individual sensors, it is possible to check whether a single sensor is in operation based on the group of three sensors.

[0021] In a preferred embodiment, the sensor system includes at least four resistance strain gauge sensors. A sensor is identified as being in operation when the average of the output voltages of three adjacent sensors is greater than a second operating voltage threshold, or when the output voltages of at least two of the three adjacent sensors are greater than or equal to a first operating voltage threshold. Thus, even if it is not possible to check the output voltages of individual sensors, it is possible to check whether an individual sensor is in operation from the group of four sensors.

[0022] In a preferred embodiment, the abnormal voltage range depends on the performance parameters of the sensor and the abnormal operating state to be identified. Typical faults of the resistance strain sensor include poor contact of the power supply line, damage to internal electronic components, and poor contact of the voltage output terminal. In these faults, the output voltage of the sensor no longer changes linearly with the change of the measured physical quantity, but usually remains at a specific value, such as zero or maximum output value, or oscillates around a specific value. Therefore, the abnormal voltage range can be appropriately set according to the performance parameters of the resistance strain sensor and the abnormal operating state to be identified, so as to identify known specific faults.

[0023] In a preferred embodiment, the collected output voltage is pre-processed to eliminate measurement errors and interference. Preferably, the pre-processing includes low-pass filtering and elimination of abnormal data, thereby ensuring high-quality data input.

[0024] According to another aspect of the present invention, there is provided an apparatus for identifying an operating state of a sensor system, characterized by comprising:

[0025] an acquisition module configured to periodically acquire an output voltage of each of a plurality of cooperating resistive strain sensors of the sensor system within each of a plurality of subintervals divided from one or more identification intervals;

[0026] a checking module, configured to check whether the sensor should be in operation;

[0027] A determination module is configured to identify an actual operating state of the sensor by means of the output voltage when the sensor is supposed to be in operation.

[0028] In a preferred embodiment, the acquisition module includes a preprocessing unit that preprocesses the acquired output voltage to eliminate measurement errors and interference. Preferably, the preprocessing unit performs low-pass filtering and / or eliminates abnormal data on the acquired data, thereby ensuring high-quality data input.

[0029] According to another aspect of the present invention, there is provided an electronic device for identifying an operating status of a sensor system, characterized by comprising:

[0030] one or more processors;

[0031] a storage device for storing one or more programs,

[0032] When the one or more programs are executed by the one or more processors, the one or more processors implement the method for identifying the operating status of a sensor system according to the present invention.

[0033] According to another aspect of the present invention, a computer-readable medium is provided, on which a computer program is stored, wherein when the program is executed by a processor, the method for identifying the operating status of a sensor system according to the present invention is implemented.

[0034] The advantages and benefits described with regard to the method according to the invention for detecting an operating state of a sensor system also apply to the device and electronic device according to the invention for detecting an operating state of a sensor system and to the computer-readable medium according to the invention.

[0035] The further effects of the above-mentioned non-conventional optional manner will be described below in conjunction with specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings are provided for a better understanding of the present invention and are not intended to limit the present invention.

[0037] FIG1 is an exemplary application scenario of the method for identifying the operating status of a sensor system according to the present invention;

[0038] 2 is a schematic diagram of the main flow of a method for identifying an operating state of a sensor system according to the present invention;

[0039] 3 is a schematic diagram of main modules of an apparatus for identifying an operating state of a sensor system according to the present invention;

[0040] FIG4 is a schematic diagram of the structure of a computer system of a terminal device or a server suitable for implementing an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The following description of exemplary embodiments of the present invention is made in conjunction with the accompanying drawings, in which various details of the embodiments of the present invention are included to facilitate understanding. These details should be considered as merely exemplary. Therefore, it should be appreciated by those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present invention. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0042] FIG1 illustrates an exemplary application scenario of a method for identifying the operating status of a sensor system according to the present invention. Vehicle 10 is, for example, a truck, and a sensor system comprising six load cells is installed between the cargo container and the chassis longitudinal beams of vehicle 10. Load cells LC1, LC2, and LC3 are arranged sequentially on the left side of the vehicle from the front to the rear, while load cells LC4, LC5, and LC6 are arranged sequentially on the right side of the vehicle from the rear to the front. Load cells LC1 and LC6 are positioned opposite each other, load cells LC2 and LC5 are positioned opposite each other, and load cells LC3 and LC4 are positioned opposite each other. Each load cell can be weighed independently, and the total load applied to the sensor system, i.e., the mass of the cargo container, can be obtained by summing the weighing results of all load cells.

[0043] If a sensor in the sensor system of the vehicle 10 is in an abnormal operating state, the correct container mass cannot be provided. In order to avoid providing erroneous load information in the vehicle 10, it is necessary to identify the sensor in the abnormal operating state when the sensor system is running.

[0044] The following describes an identification process performed in the application scenario of FIG1 .

[0045] During each acquisition cycle, the output voltages of load cells LC1, LC2, LC3, LC4, LC5, and LC6 are acquired. To eliminate measurement errors and interference, the acquired output voltages undergo preprocessing. This preprocessing, for example, involves low-pass filtering and eliminating significantly abnormal measurement data.

[0046] The sensor system is then checked to see if it is loaded. This is done by checking whether the sum V_sum of the output voltages of the six load cells LC1, LC2, LC3, LC4, LC5, and LC6 is greater than or equal to a total operating voltage threshold V_sum_thd. The total operating voltage threshold V_sum_thd indicates that the vehicle is carrying a payload and is, for example, 1.0 V. If this condition is met, the sensor system is loaded, and the operating status of each load cell needs to be identified. Otherwise, the sensor system is unloaded, and this identification is not necessary.

[0047] Next, each load cell is checked for load. This is done by checking whether the output voltages of two sensors adjacent to the sensor being checked are both greater than or equal to a first operating voltage threshold V_thd, where the first operating voltage threshold V_thd indicates that a single load cell is loaded and is, for example, 0.2V. If the condition is met, the load cell is checked for load; otherwise, the load cell is checked for unload. In vehicle 10 of FIG1 , the two adjacent sensors can be selected as follows: two sensors on the same side, or one sensor on the same side and a sensor opposite it on the other side. For example, the two adjacent sensors of load cell LC1 are load cells LC2 and LC6, and the two adjacent sensors of load cell LC2 are load cells LC1 and LC3.

[0048] Optionally, when checking whether each load cell is loaded, three adjacent load cells are selected. The check condition is that the output voltage of at least two of the three adjacent load cells is greater than or equal to a first operating voltage threshold value V_thd, or the average output voltage of the three adjacent load cells is greater than a second operating voltage threshold value V_thd', such as 0.4V. In vehicle 10 of FIG1 , the three adjacent load cells can be selected as follows: two sensors on the same side and one sensor on the opposite side, or one sensor on the same side and two sensors on the opposite side that are relatively close to the sensor. For example, the three adjacent load cells of load cell LC1 are load cells LC2, LC5, and LC6, and the three adjacent load cells of load cell LC2 are load cells LC1, LC3, and LC5.

[0049] It is understandable that the number of sensors that cooperate with each other included in the sensor system is not limited to six, and can be more or less, such as four or eight, wherein either of the two above-mentioned methods of checking whether each weighing sensor is loaded can still be used.

[0050] When a certain weighing sensor in the sensor system, for example, LC1, is identified as being loaded, ie, should be in an operating state, the operating state of the weighing sensor LC1 is identified.

[0051] To identify the operating status of load cell LC1, two identification intervals are provided: a shorter subinterval ts and a longer identification interval tmin. For example, if the sensor system's acquisition period T = 0.1 seconds, subinterval ts = 2 seconds, and identification interval tmin = 1 minute. According to the teachings of the present invention, those skilled in the art can set the sizes of subinterval ts and identification interval tmin based on the acquisition period of the sensor system used, as long as subinterval ts covers multiple acquisition periods and identification interval tmin covers multiple subintervals ts.

[0052] First, within the 2-second subinterval ts, each acquisition is checked to see if the output voltage of load cell LC1 is within the abnormal voltage range V_inv. If so, an abnormal voltage is considered present, and the number of abnormal acquisitions, nr_ts, is incremented by 1. The abnormal voltage range V_inv is the voltage range within which the output voltage of load cell LC1 remains constant during abnormal operation. For example, when the output terminal has poor contact, the output voltage remains near zero, so the abnormal voltage range V_inv is set from -0.1V to 0.1V. It is understood that load cell LC1 exhibits different output characteristics under different faults. Therefore, the abnormal voltage range V_inv can be specifically set based on the performance parameters of load cell LC1 to address specific faults.

[0053] For each subinterval ts, a collection quantity threshold nr_ts_limit=f1*N is set, where the first coefficient f1 is freely set and has a value range between 0 and 1, and N is the number of collections within a subinterval ts. For example, if f1=0.5, the collection quantity threshold nr_ts_limit=10.

[0054] After a subinterval ts ends, if the number of abnormal collections nr_ts ≥ the collection number threshold nr_ts_limit, the subinterval ts is considered to be an abnormal subinterval, and the number of abnormal subintervals nr_tmin is increased by 1. At the same time, the number of abnormal collections nr_ts is cleared so that the number of abnormal states can be recounted in the next subinterval ts.

[0055] For each identification interval tmin, a subinterval number threshold nr_tmin_limit = f2 * M is set, where the second coefficient f2 is freely settable and has a numerical range between 0 and 1, and M is the number of subintervals within the identification interval tmin. For example, if f2 = 0.3, then the subinterval number threshold nr_tmin_limit = 9.

[0056] After an identification interval tmin, if the number of abnormal subintervals nr_tmin ≥ the subinterval number threshold nr_tmin_limit, the load cell's operating status is determined to be abnormal. Otherwise, the load cell LC1's operating status is determined to be normal. At the same time, the number of abnormal subintervals nr_tmin is reset to zero, allowing the number of abnormal subintervals to be recounted in the next identification interval tmin. This completes the identification of the load cell LC1's operating status.

[0057] If a plurality of load cells are detected as loaded, the operating states of these load cells can then be detected either simultaneously or sequentially.

[0058] It can be understood that the various thresholds used above, such as the total operating voltage threshold V_sum_thd, the first operating voltage threshold V_thd, and the second operating voltage threshold V_thd', are given as examples based on typical weighing sensors. In practice, they should be specifically set according to the performance parameters of the weighing sensor used.

[0059] Furthermore, it is understandable that the above identification process is not limited to being used for weighing sensors, but can also be used for angle sensors, height sensors, etc., as long as they are resistive strain sensors.

[0060] According to the present invention, a method for identifying the operating status of a sensor system is proposed. FIG3 shows a schematic diagram of the main process of the method, wherein the following steps are performed for each of a plurality of cooperating resistive strain gauge sensors in the sensor system:

[0061] Step S201: periodically collecting the output voltage of the sensor within each sub-interval ts of a plurality of sub-intervals ts divided from one or more identification intervals tmin.

[0062] Optionally, in order to eliminate measurement errors and interference, the collected output voltage is preprocessed.

[0063] Step S202: Check whether the sensor is in operation. If the sensor is in operation, then continue to execute the subsequent step S203; otherwise, step S203 is no longer executed for the sensor.

[0064] Optionally, only when the sum of the output voltages of all the sensors of the sensor system is greater than or equal to the total operating voltage threshold V_sum_thd does it continue to check whether each sensor should be in operation.

[0065] Optionally, the sensor system includes at least three resistive strain gauge sensors, and when the output voltages of two adjacent sensors of a sensor are both greater than or equal to a first operating voltage threshold value V_thd, the sensor is identified as being in operation. Optionally, the sensor system includes at least four resistive strain gauge sensors, and when the average output voltage of three adjacent sensors of a sensor is greater than a second operating voltage threshold value V_thd', or when the output voltages of at least two of the three adjacent sensors of a sensor are both greater than or equal to the first operating voltage threshold value V_thd, the sensor is identified as being in operation.

[0066] Step S203: If the sensor should be in operation, the actual operating state of the sensor is identified through the output voltage.

[0067] Optionally, the actual operating status of the sensor is determined in the following manner: a sub-interval in which the output voltage is within the abnormal voltage range the number of times exceeds the acquisition quantity threshold nr_ts_limit within its time period is determined as an abnormal sub-interval; if the number nr_tmin of abnormal sub-intervals within an identification interval tmin exceeds the sub-interval quantity threshold nr_tmin_limit, the sensor is identified as being in an abnormal operating state; otherwise, the sensor is identified as being in a normal operating state.

[0068] Optionally, the abnormal voltage range depends on performance parameters of the sensor and an abnormal operating state to be identified.

[0069] FIG3 is a schematic diagram of main modules of an apparatus 300 for identifying the operating status of a sensor system according to the present invention, the apparatus comprising:

[0070] The acquisition module 301 is used to periodically acquire the output voltage of each of the multiple resistive strain sensors cooperating with each other in the sensor system within each sub-interval ts of the multiple sub-intervals ts divided from one or more identification intervals tmin.

[0071] Optionally, the acquisition module includes a pre-processing unit 310, and the pre-processing unit 310 pre-processes the acquired output voltage to eliminate measurement errors and interference.

[0072] The checking module 302 is used to check whether the sensor should be in operation.

[0073] The determination module 303 is configured to identify the actual operating state of the sensor through the output voltage when the sensor should be in operation.

[0074] 4, which shows a schematic diagram of a computer system 400 suitable for implementing a terminal device according to an embodiment of the present invention. The terminal device shown in FIG4 is merely an example and should not limit the functionality and scope of use of the embodiment of the present invention.

[0075] As shown in FIG4 , a computer system 400 includes a central processing unit (CPU) 401, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 402 or a program loaded from a storage unit 408 into a random access memory (RAM) 403. Various programs and data required for the operation of the system 400 are also stored in the RAM 403. The CPU 401, the ROM 402, and the RAM 403 are connected to each other via a bus 404. An input / output (I / O) interface 405 is also connected to the bus 404.

[0076] The following components are connected to the I / O interface 405: an input section 406 including a keyboard, a mouse, and the like; an output section 407 including devices such as a cathode ray tube (CRT), a liquid crystal display (LCD), and a speaker; a storage section 408 including a hard disk; and a communication section 409 including a network interface card such as a LAN card or a modem. The communication section 409 performs communication processing via a network such as the Internet. A drive 410 is also connected to the I / O interface 405 as needed. Removable media 411, such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory, is installed in the drive 410 as needed, so that computer programs read therefrom can be installed into the storage section 408 as needed.

[0077] In particular, according to the embodiments disclosed in the present invention, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, the embodiments disclosed in the present invention include a computer program product comprising a computer program carried on a computer-readable medium, the computer program comprising program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network via the communication section 409, and / or installed from a removable medium 411. When the computer program is executed by the central processing unit (CPU) 401, the above-mentioned functions defined in the system of the present invention are performed.

[0078] It should be noted that the computer-readable medium described in the present invention can be a computer-readable signal medium or a computer-readable storage medium, or any combination thereof. A computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of computer-readable storage media can include, but are not limited to, an electrical connection having one or more conductors, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present invention, a computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In the present invention, a computer-readable signal medium can include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. This propagated data signal can take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transport a program for use by or in conjunction with an instruction execution system, apparatus, or device. Program code embodied on a computer-readable medium may be transmitted using any suitable medium, including but not limited to wireless, wireline, optical fiber cable, RF, or any suitable combination thereof.

[0079] The flowcharts and block diagrams in the accompanying drawings illustrate the possible implementation architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present invention. In this regard, each box in the flowchart or block diagram can represent a module, program segment, or a part of code, and the above-mentioned module, program segment, or a part of code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart, can be implemented with a dedicated hardware-based system that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0080] The modules described in the embodiments of the present invention may be implemented in software or hardware. The modules described may also be provided within a processor. For example, a processor may be described as comprising an acquisition module, an inspection module, and a determination module. The names of these modules do not, in some cases, limit the modules themselves. For example, an acquisition module may also be described as an "acquisition module."

[0081] As another aspect, the present invention further provides a computer-readable medium, which may be included in the device described in the above embodiment; or may exist independently and not be assembled into the device. The computer-readable medium carries one or more programs, and when the one or more programs are executed by a device, the device includes: for each of a plurality of mutually cooperating resistive strain sensors in a sensor system: periodically collecting the output voltage of the sensor within each of a plurality of subintervals divided from one or more identification intervals; checking whether the sensor should be in operation; and if the sensor should be in operation, identifying the actual operating state of the sensor through the output voltage.

[0082] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may occur depending on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A method for identifying an operating state of a sensor system, characterized in that The steps include: For each of a plurality of resistive strain sensors cooperating with each other in the sensor system: Periodically sampling the output voltage of the sensor within each of a plurality of subintervals (ts) divided from one or more identification intervals (tmin); checking whether the sensor should be in operation; and If the sensor is to be in operation, the actual operating state of the sensor is detected via the output voltage.

2. The method according to claim 1, characterized in that The actual operating status of the sensor is determined by: A sub-interval in which the output voltage is within the abnormal voltage range the number of times exceeds the acquisition quantity threshold (nr_ts_limit) within its time period is determined as an abnormal sub-interval; if the number of abnormal sub-intervals (nr_tmin) within an identification interval (tmin) exceeds the sub-interval quantity threshold (nr_tmin_limit), the sensor is identified as being in an abnormal operating state; otherwise, the sensor is identified as being in a normal operating state.

3. The method according to claim 1, characterized in that Only when the sum of the output voltages of all the sensors in the sensor system is greater than or equal to the total operating voltage threshold (V_sum_thd) does it continue to check whether each sensor should be in operation.

4. The method according to claim 3, characterized in that The sensor system has at least three resistance strain gauge sensors. When the output voltages of two adjacent sensors of a sensor are both greater than or equal to a first operating voltage threshold (V_thd), the sensor is identified as being in operation.

5. The method according to claim 3, characterized in that The sensor system has at least four resistive strain sensors, and the sensor is identified as being in operation when the average value of the output voltages of three adjacent sensors of a sensor is greater than a second operating voltage threshold (V_thd') or when the output voltages of at least two of the three adjacent sensors of a sensor are greater than or equal to a first operating voltage threshold (V_thd).

6. The method according to claim 1, characterized in that The abnormal voltage range depends on the performance parameters of the sensor and the abnormal operating state to be identified.

7. The method according to any one of claims 1 to 6, characterized in that In order to eliminate measurement errors and interference, the collected output voltage is preprocessed.

8. A device for identifying the operating status of a sensor system, characterized in that include: an acquisition module configured to periodically acquire an output voltage of each of a plurality of cooperating resistive strain gauge sensors of a sensor system within each of a plurality of subintervals (ts) divided from one or more identification intervals (tmin); a checking module, configured to check whether the sensor should be in operation; A determination module is configured to identify an actual operating state of the sensor by means of the output voltage when the sensor is supposed to be in operation.

9. The device according to claim 8, characterized in that The acquisition module includes a preprocessing unit, which preprocesses the acquired output voltage to eliminate measurement errors and interference.

10. An electronic device for identifying the operating status of a sensor system, characterized in that: include: one or more processors; a storage device for storing one or more programs, When the one or more programs are executed by the one or more processors, the one or more processors implement the method according to any one of claims 1 to 7.

11. A computer-readable medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

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