Metal detection method, device, storage medium and electronic equipment

Abstract

The present disclosure relates to a metal detection method, device, storage medium and electronic device; the method comprises the following steps: receiving a first signal from a belt interface sent by a metal detector and determining a first receiving time when the first signal is received when the belt is running in the current cycle; receiving a second signal from a target object sent by the metal detector and determining a second receiving time when the second signal is received; determining the presence of metal in the target object when the time difference between the first receiving time and the second receiving time is greater than or equal to a preset time difference; through the above scheme, the belt interface can completely pass through the metal detector within the preset time difference, thereby determining the presence of metal in the target object according to the second signal, avoiding the situation where the first signal from the belt interface is mistakenly regarded as metal, and improving the accuracy of metal detection.

Description

Technical Field

[0001] The present disclosure relates to the field of power generation technology, and in particular to a metal detection method, device, storage medium, and electronic equipment. Background Art

[0002] In the field of power generation, especially thermal power generation, materials need to be conveyed by belts. During the conveying process, metal detectors are used to detect metal in the materials to prevent metal damage to equipment.

[0003] In related technologies, steel belts are widely used for material transportation. However, steel belts contain metals, and the content is relatively high at the belt interfaces. These metals can easily cause false alarms in metal detectors, resulting in low accuracy of metal detection. Summary of the Invention

[0004] The purpose of the present disclosure is to provide a metal detection method, device, storage medium and electronic equipment.

[0005] In order to achieve the above object, the present disclosure provides a metal detection method, the method comprising:

[0006] When the belt is running in a current cycle, a first signal sent by the metal detector is received, and a first reception time of the first signal is determined; the first signal is a signal obtained by the metal detector detecting a belt interface of the belt during the current cycle; the belt carries a target object to be detected;

[0007] receiving a second signal sent by the metal detector and determining a second receiving time at which the second signal is received; the second signal is a signal obtained by the metal detector detecting the target object within the current period;

[0008] When the time difference between the first receiving time and the second receiving time is greater than or equal to a preset time difference, it is determined that metal exists in the target object.

[0009] Optionally, the method further includes:

[0010] In a case where the time difference between the first receiving time and the second receiving time is less than the preset time difference, the second signal is ignored.

[0011] Optionally, when a time difference between the first receiving time and the second receiving time is greater than or equal to a preset time difference, determining that metal exists in the target object includes:

[0012] When the time difference between the first receiving time and the second receiving time is greater than or equal to a preset time difference, performing an AND operation on the first signal and the second signal to obtain a target signal;

[0013] The metal is determined to exist in the target object according to the target signal.

[0014] Optionally, when the belt is running in the current cycle, receiving a first signal sent by the metal detector includes:

[0015] In the case of receiving the first signal, determining a third reception time of the first signal; the third reception time is greater than the first reception time;

[0016] When the third receiving time reaches a preset time threshold, it is determined that the operation of the belt enters a next cycle; the next cycle refers to a next cycle adjacent to the current cycle.

[0017] Optionally, when the third receiving time reaches a preset time threshold, determining that the operation of the belt enters a next cycle includes:

[0018] When the third receiving time reaches the preset time threshold, obtaining a third signal;

[0019] It is determined that the operation of the belt enters the next cycle according to the third signal and the first signal.

[0020] Optionally, the method further includes:

[0021] In the case where the first signal is received and a stop signal of the belt is received, the first signal is discarded.

[0022] Optionally, the method further includes:

[0023] When it is determined that the metal exists in the target object, an alarm prompt is issued.

[0024] In a second aspect, the present disclosure provides a metal detection device, comprising:

[0025] a first receiving module, configured to receive a first signal sent by the metal detector when the belt is running in a current cycle, and determine a first receiving time when the first signal is received; the first signal is a signal obtained by the metal detector detecting a belt interface of the belt during the current cycle; the belt carries a target object to be detected;

[0026] a second receiving module, configured to receive a second signal sent by the metal detector and determine a second receiving time at which the second signal is received; the second signal is a signal obtained by the metal detector detecting the target object within the current period;

[0027] The determination module is configured to determine that metal exists in the target object when a time difference between the first receiving time and the second receiving time is greater than or equal to a preset time difference.

[0028] Optionally, the device further comprises:

[0029] The ignoring module is configured to ignore the second signal when the time difference between the first receiving time and the second receiving time is less than the preset time difference.

[0030] Optionally, the device further comprises:

[0031] a second determining module, configured to, when the time difference between the first receiving time and the second receiving time is greater than or equal to a preset time difference, perform an AND operation on the first signal and the second signal to obtain a target signal;

[0032] The metal is determined to exist in the target object according to the target signal.

[0033] Optionally, the device further comprises:

[0034] a third determining module, configured to, upon receiving the first signal, determine a third receiving time of the first signal; wherein the third receiving time is greater than the first receiving time;

[0035] When the third receiving time reaches a preset time threshold, it is determined that the operation of the belt enters a next cycle; the next cycle refers to a next cycle adjacent to the current cycle.

[0036] Optionally, the device further comprises:

[0037] A fourth determining module, configured to obtain a third signal when the third receiving time reaches the preset time threshold;

[0038] It is determined that the operation of the belt enters the next cycle according to the third signal and the first signal.

[0039] Optionally, the device further comprises:

[0040] The discarding module is configured to discard the first signal when both the first signal and the stop signal of the belt are received.

[0041] Optionally, the device further comprises:

[0042] The alarm module is used to issue an alarm prompt when it is determined that the metal exists in the target object.

[0043] In a third aspect, the present disclosure provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the metal detection method provided in the first aspect.

[0044] In a fourth aspect, the present disclosure provides an electronic device, comprising:

[0045] a memory having a computer program stored thereon;

[0046] A processor is used to execute the computer program in the memory to implement the metal detection method provided by the first aspect above.

[0047] The present invention is disclosed by receiving a first signal sent by a metal detector and determining a first receiving time of receiving the first signal when the belt is running in the current cycle; the first signal is a signal obtained by the metal detector when detecting the belt interface of the belt in the current cycle; the belt carries a target object to be detected; receiving a second signal sent by the metal detector and determining a second receiving time of receiving the second signal; the second signal is a signal obtained by the metal detector when detecting the target object in the current cycle; and determining the presence of metal in the target object when the time difference between the first receiving time and the second receiving time is greater than or equal to a preset time difference. Through the above technical solution, the belt interface can completely pass through the metal detector within the preset time difference, so that the presence of metal in the target object is determined according to the second signal, avoiding the situation where the first signal of the belt interface is mistakenly regarded as metal, and improving the accuracy of metal detection.

[0048] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0050] Figure 1 The figure is a flow chart showing a metal detection method according to an exemplary embodiment.

[0051] Figure 2 The figure is a flow chart showing another metal detection method according to an exemplary embodiment.

[0052] Figure 3The figure is a structural block diagram of a metal detection device according to an exemplary embodiment.

[0053] Figure 4 The figure is a structural block diagram of an electronic device according to an exemplary embodiment.

[0054] Figure 5 It is a structural block diagram of another electronic device according to an exemplary embodiment. DETAILED DESCRIPTION

[0055] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0056] First, let's introduce the application scenarios of the present disclosure. The present disclosure is applied to scenarios where materials, such as coal, are transported via belts. In the field of power generation, especially thermal power plants, belts are often used to transport materials to a crusher, which crushes the materials for subsequent use. During this process, metal detectors are used to detect metal in the materials, and then iron removers are used to remove the metal. Alternatively, the belts can be stopped and the metal removed to prevent damage to the equipment.

[0057] In existing technology, various metals are often mixed into materials during mining and transportation. Furthermore, the extensive use of steel belts during material transport makes it difficult for metal detectors to effectively detect metals in the materials. Since steel belts contain metal, and the concentration is higher at the belt joints, if the metal detector is set too high in sensitivity, detection signals will also be emitted at the steel belt joints as they pass through the metal detector. If the metal detector is set too low in sensitivity, medium and small pieces of metal in the materials cannot be detected, resulting in low metal detection accuracy and even damage to the equipment.

[0058] Therefore, the present disclosure provides a metal detection method, device, storage medium and electronic device; by receiving a first signal sent by a metal detector and determining a first receiving time of receiving the first signal when the belt is running in the current cycle; the first signal is a signal obtained by the metal detector when detecting the belt interface of the belt in the current cycle; the belt carries a target object to be detected; receiving a second signal sent by the metal detector and determining a second receiving time of receiving the second signal; the second signal is a signal obtained by the metal detector when detecting the target object in the current cycle; when the time difference between the first receiving time and the second receiving time is greater than or equal to a preset time difference, determining that there is metal in the target object. Through the above technical solution, the belt interface can completely pass through the metal detector within the preset time difference, so that the presence of metal in the target object is determined according to the second signal, avoiding the situation where the first signal of the belt interface is mistakenly regarded as metal, and improving the accuracy of metal detection.

[0059] Figure 1 FIG. 1 is a flow chart of a metal detection method according to an exemplary embodiment. Figure 1 As shown, the method includes the following steps:

[0060] S101. When the belt is running in a current cycle, receive a first signal sent by a metal detector, and determine a first receiving time of the first signal.

[0061] The first signal is a signal obtained by the metal detector when detecting a belt interface of the belt in the current cycle; the belt carries a target object to be detected.

[0062] For example, the first signal can be passed through the Set terminal of an RS trigger to obtain a candidate signal; the candidate signal can be passed through a time delay relay to determine a first receiving time. The first receiving time can be the time it takes for the belt interface to completely pass through the metal detector, and can also be a value determined based on the length of the belt interface and the operating speed of the belt. For example, if the belt interface is 1 meter long and the belt is operating at a speed of 2.5 m / s, the time it takes for the belt to pass through the metal detector can be 2.5 seconds. The first receiving time can also be a preset time range, for example, 2 seconds to 3 seconds.

[0063] For example, the current period may be a preset value, such as 106 seconds. The preset value may be a value set by the user based on the device's conditions, and the present disclosure is not limited thereto. The metal detector may be a gantry-type metal detector positioned above the belt. The target object may be a conveyed material, such as coal.

[0064] S102: Receive a second signal sent by the metal detector, and determine a second receiving time when the second signal is received.

[0065] The second signal is a signal obtained by the metal detector when detecting the target object in the current cycle. For example, the second receiving time range may be less than or equal to a preset threshold, and the preset threshold may be 1 second.

[0066] S103: Determine that metal exists in the target object when the time difference between the first receiving time and the second receiving time is greater than or equal to a preset time difference.

[0067] The preset time difference may be in the range of 2s-4s, for example, 3s. When the time difference is greater than or equal to the preset time difference, it can be considered that the belt interface has completely passed through the metal detector, thereby determining the presence of metal in the target object based on the second signal.

[0068] Through the above technical solution, the belt interface can completely pass through the metal detector within the preset time difference, so that the presence of metal in the target object is determined based on the second signal, avoiding the situation where the first signal of the belt interface is mistaken for metal, and improving the accuracy of metal detection.

[0069] In some embodiments, if the time difference between the first reception time and the second reception time is less than a preset time difference, the second signal is ignored. For example, if the time difference is less than the preset time difference, it can be considered that the belt interface has not completely passed through the metal detector, and the second signal can be understood as a signal obtained by the metal detector detecting the belt interface. The presence of metal in the target object cannot be determined, and the second signal is therefore ignored.

[0070] In some embodiments, if the time difference between the first reception time and the second reception time is greater than or equal to a preset time difference, the first signal and the second signal are ANDed together to generate a target signal; based on the target signal, the presence of metal in the target object is determined. For example, the first signal and the second signal can be passed through an AND gate to ensure that the target signal is generated only when the first signal and the second signal are present simultaneously, thereby determining the presence of metal in the target object based on the target signal. This prevents the signal from the belt interface from being mistaken for metal.

[0071] In other embodiments, when the belt is operating in the current cycle and receives a first signal sent by the metal detector, a third reception time of the first signal can be determined; the third reception time is greater than the first reception time; and when the third reception time reaches a preset time threshold, the belt is determined to have entered the next cycle; the next cycle is the cycle adjacent to the current cycle. A third signal can be obtained when the third reception time reaches the preset time threshold; and the belt is determined to have entered the next cycle based on the third signal and the first signal.

[0072] For example, the preset time threshold can be slightly less than the belt's operating cycle, such as 104 seconds. After the first signal passes through the Set terminal of the RS flip-flop, a candidate signal is generated. This candidate signal passes through the periodic relay to determine a third reception time. When the third reception time reaches the preset time threshold, a third signal is output. This third signal passes through the Reset1 terminal of the RS flip-flop, triggering a reset of the RS flip-flop, thereby discarding the first signal and allowing the belt to enter the next cycle. In this way, when the belt interface passes through the metal detector again, a new first signal is generated, allowing the metal detection method to repeat.

[0073] In other embodiments, upon receiving the first signal and a stop signal for the belt, the first signal is discarded. For example, after receiving the stop signal, the stop signal is passed through the Reset1 terminal of an RS flip-flop, triggering a reset of the RS flip-flop, thereby discarding the first signal. This allows the belt interface to receive a new first signal when it passes through the metal detector again after the belt resumes operation, preventing the presence of the first signal from influencing the detection results and improving the accuracy of the detection results.

[0074] It is understandable that the third signal and the stop signal can be passed through an OR gate and then connected to the Reset1 terminal of the RS flip-flop. In this way, only one of the above signals needs to be received to trigger the reset of the RS flip-flop, thereby improving working efficiency.

[0075] In other embodiments, when the metal is determined to be present in the target object, an alarm is issued. For example, the alarm may include a text prompt and / or a voice prompt to inform the user that metal has been detected in the target object, so that the user can promptly handle the metal to prevent damage to the device caused by the metal.

[0076] The following Figure 2 An example of a metal detection device is given below: Figure 2As shown, the device includes an OR gate 18, an RS trigger (RS01) 19, a time delay relay (TON07) 20, a periodic relay (TON08) 23 and an AND gate 21; SBY102216 is the signal of the metal detector, TON08.Q is the output signal (third signal) of the periodic relay (TON08), SBY101602 is the stop signal, and DM10BAK1009 is the target signal 22, which is used to determine the presence of metal in the target object.

[0077] First, a metal detector is installed above the belt and debugged. The techniques for debugging metal detectors are well-known and will not be elaborated on here. Next, the metal detection signal is connected to a distributed control system (DCS) or programmable logic controller (PLC), which then runs the metal detection method described above.

[0078] The belt starts to run in the current cycle. When the metal detector detects the belt interface for the first time, a first signal (SBY102216) is obtained. The first signal is connected to the Set end of the RS trigger to obtain a candidate signal.

[0079] The candidate signal is received for a first time (3 seconds) via a time delay relay. Upon receiving a second signal (SBY102216) from the metal detector, the candidate signal and the second signal are combined through an AND gate to generate a target signal (DM10BAK1009), confirming the presence of metal in the target object. During this process, since the candidate signal remains constant, if the second signal is received again, the candidate signal and the second signal are combined through an AND gate to generate the target signal, confirming the presence of metal in the target object.

[0080] The candidate signal determines the third receiving time through the periodic relay, and when the third receiving time reaches the preset time threshold (104s), the third signal (TON08.Q) is obtained; after the third signal passes through the OR gate, it is connected to the Reset1 end of the RS trigger, causing the RS trigger to reset, thereby discarding the above-mentioned first signal, and the belt operation enters the next cycle; at this time, the RS trigger has no output, so there is no target signal; when the belt interface passes through the metal detector again, a new first signal can be obtained, and the above process is repeated according to the new first signal.

[0081] When the belt stops, a stop signal (SBY101602) for the belt operation is received. After passing through the OR gate, the stop signal is connected to the Reset1 end of the RS trigger, causing the RS trigger to reset, thereby discarding the above-mentioned first signal; at this time, the RS trigger has no output, so there is no target signal; when the belt interface passes through the metal detector again, a new first signal can be obtained, and the above-mentioned process is repeated according to the new first signal.

[0082] Figure 3 FIG. 3 is a structural block diagram of a metal detection device 300 according to an exemplary embodiment. Figure 3 As shown, the apparatus 300 includes a first receiving module 310, a second receiving module 320 and a determining module 330;

[0083] The first receiving module 310 is configured to receive a first signal sent by the metal detector when the belt is operating in a current cycle, and determine a first reception time at which the first signal is received; the first signal is a signal obtained by the metal detector detecting a belt interface of the belt during the current cycle; the belt carries a target object to be detected;

[0084] The second receiving module 320 is configured to receive a second signal sent by the metal detector and determine a second receiving time at which the second signal is received; the second signal is a signal obtained by the metal detector detecting the target object during the current cycle;

[0085] The determination module 330 is configured to determine that metal exists in the target object when a time difference between the first receiving time and the second receiving time is greater than or equal to a preset time difference.

[0086] Through the above technical solution, the belt interface can completely pass through the metal detector within the preset time difference, so that the presence of metal in the target object is determined based on the second signal, avoiding the situation where the first signal of the belt interface is mistaken for metal, and improving the accuracy of metal detection.

[0087] Optionally, the device further comprises:

[0088] The ignoring module is configured to ignore the second signal if the time difference between the first receiving time and the second receiving time is less than the preset time difference.

[0089] Optionally, the device further comprises:

[0090] a second determining module, configured to, if the time difference between the first receiving time and the second receiving time is greater than or equal to a preset time difference, perform an AND operation on the first signal and the second signal to obtain a target signal;

[0091] The metal is determined to exist in the target object according to the target signal.

[0092] Optionally, the device further comprises:

[0093] a third determining module, configured to, upon receiving the first signal, determine a third receiving time of the first signal; wherein the third receiving time is greater than the first receiving time;

[0094] When the third receiving time reaches the preset time threshold, it is determined that the operation of the belt enters the next cycle; the next cycle refers to the next cycle adjacent to the current cycle.

[0095] Optionally, the device further comprises:

[0096] A fourth determining module, configured to obtain a third signal when the third receiving time reaches the preset time threshold;

[0097] According to the third signal and the first signal, it is determined that the operation of the belt enters the next cycle.

[0098] Optionally, the device further comprises:

[0099] The discarding module is used to discard the first signal when receiving the first signal and the stop signal of the belt.

[0100] Optionally, the device further comprises:

[0101] The alarm module is used to issue an alarm prompt when it is determined that the metal exists in the target object.

[0102] Regarding the apparatus in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0103] In summary, the present disclosure receives a first signal sent by a metal detector and determines a first receiving time when the first signal is received when the belt is running in the current cycle; the first signal is a signal obtained by the metal detector when detecting the belt interface of the belt in the current cycle; the belt carries a target object to be detected; receives a second signal sent by the metal detector and determines a second receiving time when the second signal is received; the second signal is a signal obtained by the metal detector when detecting the target object in the current cycle; and determines that there is metal in the target object when the time difference between the first receiving time and the second receiving time is greater than or equal to a preset time difference. The above technical solution allows the belt interface to completely pass through the metal detector within the preset time difference, thereby determining that there is metal in the target object based on the second signal, avoiding the situation where the first signal of the belt interface is mistakenly regarded as metal, and improving the accuracy of metal detection.

[0104] Figure 4 FIG. 4 is a structural block diagram of an electronic device 400 according to an exemplary embodiment. Figure 4 As shown, the electronic device 400 may include: a processor 401 , a memory 402 , and may further include one or more of a multimedia component 403 , an input / output interface 404 , and a communication component 405 .

[0105] The processor 401 is used to control the overall operation of the electronic device 400 to complete all or part of the steps in the metal detection method described above. The memory 402 is used to store various types of data to support the operation of the electronic device 400. Such data may include, for example, instructions for any application or method operating on the electronic device 400, as well as application-related data, such as contact information, sent and received messages, pictures, audio, video, etc. The memory 402 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The multimedia component 403 may include a screen and an audio component. The screen may be, for example, a touch screen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signal may be further stored in the memory 402 or transmitted via the communication component 405. The audio component also includes at least one speaker for outputting audio signals. The input / output interface 404 provides an interface between the processor 401 and other interface modules. The aforementioned other interface modules may be a keyboard, a mouse, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 405 is used for wired or wireless communication between the electronic device 400 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, etc., or a combination of one or more thereof, is not limited here. Therefore, the corresponding communication component 405 may include: a Wi-Fi module, a Bluetooth module, an NFC module, etc.

[0106] In an exemplary embodiment, the electronic device 400 can be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above-mentioned metal detection method.

[0107] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided. When executed by a processor, the program instructions implement the steps of the above-described metal detection method. For example, the computer-readable storage medium may be the aforementioned memory 402 including the program instructions. The program instructions may be executed by the processor 401 of the electronic device 400 to perform the above-described metal detection method.

[0108] Figure 5 FIG. 5 is a block diagram of another electronic device 500 according to an exemplary embodiment. For example, the electronic device 500 may be provided as a server. Figure 5 The electronic device 500 includes a processor 522, which may be one or more, and a memory 532 for storing a computer program executable by the processor 522. The computer program stored in the memory 532 may include one or more modules, each corresponding to a set of instructions. In addition, the processor 522 may be configured to execute the computer program to perform the above-mentioned metal detection method.

[0109] In addition, the electronic device 500 may further include a power supply component 526 and a communication component 550. The power supply component 526 may be configured to perform power management of the electronic device 500, and the communication component 550 may be configured to implement communication, such as wired or wireless communication, of the electronic device 500. In addition, the electronic device 500 may further include an input / output interface 558. The electronic device 500 may operate based on an operating system stored in the memory 532.

[0110] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided. When executed by a processor, the program instructions implement the steps of the metal detection method described above. For example, the non-transitory computer-readable storage medium may be the memory 532 including the program instructions. The program instructions may be executed by the processor 522 of the electronic device 500 to perform the metal detection method described above.

[0111] In another exemplary embodiment, a computer program product is provided. The computer program product includes a computer program executable by a programmable device, and has code portions for performing the above-mentioned metal detection method when executed by the programmable device.

[0112] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0113] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0114] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A metal detection method, characterized in that: The method comprises: When the belt is running in a current cycle, a first signal sent by the metal detector is received, and a first reception time of the first signal is determined; the first signal is a signal obtained by the metal detector detecting a belt interface of the belt during the current cycle; the belt carries a target object to be detected; receiving a second signal sent by the metal detector and determining a second receiving time at which the second signal is received; the second signal is a signal obtained by the metal detector detecting the target object within the current period; In a case where a time difference between the first receiving time and the second receiving time is greater than or equal to a preset time difference, it is determined according to the second signal that metal exists in the target object.

2. The method according to claim 1, characterized in that The method further comprises: In a case where the time difference between the first receiving time and the second receiving time is less than the preset time difference, the second signal is ignored.

3. The method according to claim 1, characterized in that The determining that metal exists in the target object when the time difference between the first receiving time and the second receiving time is greater than or equal to a preset time difference includes: When the time difference between the first receiving time and the second receiving time is greater than or equal to a preset time difference, performing an AND operation on the first signal and the second signal to obtain a target signal; The metal is determined to exist in the target object according to the target signal.

4. The method according to claim 1, wherein The step of receiving a first signal sent by the metal detector when the belt is running in the current cycle includes: In case the first signal is received, determining a third reception time of the first signal; the third reception time is greater than the first reception time; When the third receiving time reaches a preset time threshold, it is determined that the operation of the belt enters a next cycle; the next cycle refers to a next cycle adjacent to the current cycle.

5. The method according to claim 4, characterized in that When the third receiving time reaches a preset time threshold, determining that the operation of the belt enters the next cycle includes: When the third receiving time reaches the preset time threshold, obtaining a third signal; It is determined that the operation of the belt enters the next cycle according to the third signal and the first signal.

6. The method according to claim 4, characterized in that The method further comprises: In the case where the first signal is received and a stop signal of the belt is received, the first signal is discarded.

7. The method according to claim 1, characterized in that The method further comprises: When it is determined that the metal exists in the target object, an alarm prompt is issued.

8. A metal detection device, characterized in that: The device comprises: a first receiving module, configured to receive a first signal sent by the metal detector when the belt is running in a current cycle, and determine a first receiving time when the first signal is received; the first signal is a signal obtained by the metal detector detecting a belt interface of the belt during the current cycle; the belt carries a target object to be detected; a second receiving module, configured to receive a second signal sent by the metal detector and determine a second receiving time at which the second signal is received; the second signal is a signal obtained by the metal detector detecting the target object within the current period; A determination module is configured to determine, based on the second signal, whether metal exists in the target object when a time difference between the first receiving time and the second receiving time is greater than or equal to a preset time difference.

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

10. An electronic device, characterized in that: include: a memory having a computer program stored thereon; A processor, configured to execute the computer program in the memory to implement the steps of the method according to any one of claims 1 to 7.

Images