Millimeter wave security check method, device, equipment and storage medium

Abstract

The invention discloses a millimeter wave security check method and device, equipment and a storage medium, and the method comprises the steps: determining a first person existence state based on an output signal of a correlation infrared sensor, and triggering a metal detector and generating a metal detection result when a person exists; controlling a millimeter wave emission module to operate based on the trigger signal and calculating a millimeter wave detection result; and determining a first security check result based on the metal detection result and the millimeter wave detection result, when the first security check result does not pass and the existence of people in the security check area is determined based on the correlation infrared sensor, regenerating a new millimeter wave detection result, and determining a second security check result based on the metal detection result and the new millimeter wave detection result. According to the invention, when the first security check result is not passed and the security check object is judged not to leave the security check area based on the correlation infrared sensor, the second security check result is determined by using the first metal detection result and the new millimeter wave detection result, the security check object does not need to leave the security check area, and the secondary security check process is simplified.

Description

Technical Field

[0001] The present application relates to but is not limited to the field of millimeter wave security inspection technology, and in particular to a millimeter wave security inspection method, device, equipment, and storage medium. Background Art

[0002] At present, millimeter wave security inspection systems have been widely used in airports, subways, railway stations and other places where personnel security inspection is required. Millimeter wave security inspection devices can detect contraband through millimeter wave imaging, effectively improving security inspection efficiency. However, the principle of millimeter wave security inspection can only penetrate clothing on the surface of the human body, and it is difficult to penetrate most shoes. It is impossible to effectively image and inspect the human feet, so the feet have become a blind spot for millimeter wave security inspection.

[0003] In order to make up for the foot security inspection loophole of the millimeter wave security inspection system, integrating the millimeter wave security inspection system with foot detection function has become the development trend of the industry. However, the current millimeter wave equipment with foot metal detection function has the following disadvantages: (1) The current millimeter wave equipment with foot metal detection function requires clear entry and exit directions of the equipment; (2) The current millimeter wave equipment with foot metal detection requires the person being inspected to exit the security inspection area and re-enter when the millimeter wave security inspection is invalid and needs to be re-inspected, which adds additional business processes to the millimeter wave security inspection; (3) The current millimeter wave equipment with foot metal detection function requires the security inspector to confirm that the person being inspected has completely left the channel before conducting the next security inspection, which results in the low security inspection efficiency of the millimeter wave security inspection system. Summary of the invention

[0004] The embodiments of the present application provide a millimeter wave security inspection method, apparatus, device, and storage medium, which can simplify the secondary security inspection process and improve security inspection efficiency.

[0005] In a first aspect, an embodiment of the present application provides a millimeter wave security inspection method, which is applied to a control device of a millimeter wave security inspection device, wherein the millimeter wave security inspection device further includes a security inspection door, wherein the security inspection door is provided with a metal detector, a millimeter wave transmitting module, and a plurality of groups of opposing infrared sensors, wherein the metal detector, the millimeter wave transmitting module, and each group of the plurality of groups of opposing infrared sensors are respectively connected to the control device for communication, and the method includes:

[0006] Acquire the first output signals of all the opposing infrared sensors in real time, and determine the first person presence status in the security inspection area formed by the security door based on the first output signals;

[0007] When the first person presence status indicates that a person is present, the metal detector is triggered to operate, first metal quantity data sent by the metal detector is received, and a first metal detection result is generated based on the first metal quantity data;

[0008] In response to the trigger signal, the millimeter wave transmitting module is controlled to transmit the millimeter wave in the security inspection area, and radar echo data corresponding to the millimeter wave is collected, a millimeter wave image is generated according to a preset radar imaging algorithm and the radar echo data, and image recognition is performed on the millimeter wave image based on a preset target recognition algorithm to obtain a first millimeter wave detection result;

[0009] determining a first security inspection result based on the first metal detection result and the millimeter wave detection result, and when the first security inspection result indicates that the security inspection fails, in response to the trigger signal, re-controlling the millimeter wave transmission module to operate to generate a second millimeter wave detection result;

[0010] Acquire the second output signals of all the through-beam infrared sensors, determine the second person presence status of the security inspection area based on the second output signals, and when the second person presence status indicates the presence of a person, determine the second security inspection result based on the first metal detection result and the second millimeter wave detection result.

[0011] In some embodiments, determining a first person presence state in the security inspection area formed by the security door based on the first output signal includes:

[0012] Encoding the first output signal of each opposing infrared sensor within a preset time period into a first 0-1 waveform;

[0013] Performing an OR operation on all of the first 0-1 waveforms to obtain a second 0-1 waveform;

[0014] The first person existence state is determined based on the value of the second 0-1 waveform. When the second 0-1 waveform does not have a value of 1, it is determined that the first person existence state represents the presence of no person. When the second 0-1 waveform has a value of 1, it is determined that the first person existence state represents the presence of a person.

[0015] In some embodiments, the first metal quantity data includes a plurality of metal quantity values ​​and a generation timestamp of each of the metal quantity values, and generating a first metal detection result based on the first metal quantity data includes:

[0016] Determine a target timestamp based on the second 0-1 waveform, wherein the target timestamp is a timestamp corresponding to a change in a value from 0 to 1 in the second 0-1 waveform within the preset time period;

[0017] Generate a metal content history curve based on all the metal content values ​​and the corresponding generation timestamps;

[0018] Taking the target timestamp as the starting interception point, intercepting the target curve corresponding to the target period from the metal content history curve;

[0019] The first metal detection result is generated based on the metal amount value in the target curve, a preset metal amount threshold and an over-threshold time ratio threshold.

[0020] In some embodiments, generating the first metal detection result based on the metal amount value in the target curve, a preset metal amount threshold and an over-threshold duration ratio threshold includes:

[0021] Obtaining the sum of the durations corresponding to the metal value greater than the preset metal value threshold in the target curve;

[0022] Calculate the duration ratio between the total duration and the reference duration corresponding to the target curve;

[0023] When the duration ratio is greater than the threshold of the over-threshold duration ratio, determining that the first metal detection result is a detection failure;

[0024] When the duration ratio is less than or equal to the over-threshold duration ratio threshold, it is determined that the first metal detection result is a passed detection.

[0025] In some embodiments, the method further comprises:

[0026] When the second person presence status indicates that no person is present, re-triggering the metal detector to operate, and receiving the second metal quantity data sent by the metal detector;

[0027] generating a second metal detection result based on the second metal quantity data;

[0028] The second security inspection result is determined based on the second metal detection result and the second millimeter wave detection result.

[0029] In some embodiments, the millimeter wave security inspection equipment further includes a display terminal, which is in communication with the control device, and in response to a trigger signal, controls the millimeter wave transmitting module to transmit millimeter waves in the security inspection area, and collects radar echo data corresponding to the millimeter waves, including:

[0030] generating the trigger signal in response to a click operation of a security check start control in an interactive interface of the display terminal;

[0031] In response to the trigger signal, the millimeter wave transmitting module transmits millimeter waves in the security inspection area and collects the radar echo data corresponding to the millimeter waves.

[0032] In some embodiments, after determining the first security inspection result based on the current metal detection result and the millimeter wave detection result, the method further includes:

[0033] Displaying the first security inspection result on the interactive interface;

[0034] After determining a second security inspection result based on the second metal detection result and the second millimeter wave detection result, the method further includes:

[0035] The second security check result is displayed on the interactive interface.

[0036] In a second aspect, an embodiment of the present application provides a control device, comprising at least one control processor and a memory for communicating with the at least one control processor; the memory stores instructions executable by the at least one control processor, and the instructions are executed by the at least one control processor so that the at least one control processor can execute the millimeter wave security inspection method as described in the first aspect.

[0037] In a third aspect, an embodiment of the present application further provides an electronic device, comprising the control device of the second aspect.

[0038] In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are used to execute the millimeter wave security inspection method as described in the first aspect.

[0039] The embodiment of the present application provides a millimeter wave security inspection method, device, equipment, and storage medium, the method comprising: acquiring the first output signals of all the opposing infrared sensors in real time, and determining the first person presence status of the security inspection area formed by the security door based on the first output signal; when the first person presence status indicates the presence of a person, triggering the metal detector to operate, receiving the first metal quantity data sent by the metal detector, and generating a first metal detection result based on the first metal quantity data; in response to the trigger signal, controlling the millimeter wave transmitting module to transmit millimeter waves in the security inspection area, and collecting radar echo data corresponding to the millimeter waves ... The data generates a millimeter wave image, and performs image recognition on the millimeter wave image based on a preset target recognition algorithm to obtain a first millimeter wave detection result; the first security inspection result is determined based on the first metal detection result and the millimeter wave detection result, and when the first security inspection result indicates that the security inspection fails, in response to the trigger signal, the millimeter wave transmitting module is re-controlled to operate to generate a second millimeter wave detection result; the second output signals of all the opposing infrared sensors are obtained, and the second personnel presence status of the security inspection area is determined based on the second output signals, and when the second personnel presence status indicates that there is a person, the second security inspection result is determined based on the first metal detection result and the second millimeter wave detection result. According to the scheme provided by the embodiment of the present application, when the first case result indicates that the security inspection fails, based on the opposing infrared sensor, when it is determined that the security inspection object has not left the security inspection area, the first metal detection result and the new millimeter wave detection result are used to determine the second security inspection result, without the security inspection object leaving the security inspection area, avoiding the security inspection object exiting the security inspection area and re-entering, and adding an additional millimeter wave security inspection process, simplifying the secondary security inspection process, and improving security inspection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 is a flowchart of the steps of a millimeter wave security inspection method provided by an embodiment of the present application;

[0041] Figure 2 is a structural schematic diagram of a security door provided by another embodiment of the present application;

[0042] Figure 3 It is a structural diagram of a control device provided in another embodiment of the present application. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0044] It is understood that although the functional modules are divided in the device schematic diagram and the logical order is shown in the flow chart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flow chart. The terms "first", "second", etc. in the specification, claims or the above drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0045] At present, millimeter wave security inspection systems have been widely used in airports, subways, railway stations and other places where personnel security inspection is required. Millimeter wave security inspection devices can detect contraband through millimeter wave imaging, effectively improving security inspection efficiency. However, the principle of millimeter wave security inspection can only penetrate clothing on the surface of the human body, and it is difficult to penetrate most shoes. It is impossible to effectively image and inspect the human feet, so the feet have become a blind spot for millimeter wave security inspection.

[0046] In order to make up for the foot security inspection loophole of the millimeter wave security inspection system, integrating the millimeter wave security inspection system with foot detection function has become the development trend of the industry. However, the current millimeter wave equipment with foot metal detection function has the following disadvantages: (1) The current millimeter wave equipment with foot metal detection function requires clear entry and exit directions of the equipment; (2) The current millimeter wave equipment with foot metal detection requires the person being inspected to exit the security inspection area and re-enter when the millimeter wave security inspection is invalid and needs to be re-inspected, which adds additional business processes to the millimeter wave security inspection; (3) The current millimeter wave equipment with foot metal detection function requires the security inspector to confirm that the person being inspected has completely left the channel before conducting the next security inspection, which results in the low security inspection efficiency of the millimeter wave security inspection system.

[0047] To solve the above-mentioned problems, the embodiments of the present application provide a millimeter wave security inspection method, device, equipment, and storage medium, and the method includes: acquiring the first output signals of all the opposing infrared sensors in real time, and determining the first person presence status in the security inspection area formed by the security gate based on the first output signal; when the first person presence status indicates the presence of a person, triggering the metal detector to operate, receiving the first metal quantity data sent by the metal detector, and generating a first metal detection result based on the first metal quantity data; in response to the trigger signal, controlling the millimeter wave transmitting module to transmit millimeter waves in the security inspection area, and collecting radar echo data corresponding to the millimeter waves, and according to a preset radar imaging algorithm and the The radar echo data generates a millimeter wave image, and the millimeter wave image is image recognized based on a preset target recognition algorithm to obtain a first millimeter wave detection result; the first security inspection result is determined based on the first metal detection result and the millimeter wave detection result, and when the first security inspection result indicates that the security inspection fails, in response to the trigger signal, the millimeter wave transmitting module is re-controlled to operate to generate a second millimeter wave detection result; the second output signals of all the opposing infrared sensors are obtained, and the second personnel presence status of the security inspection area is determined based on the second output signals, and when the second personnel presence status indicates that there is a person, the second security inspection result is determined based on the first metal detection result and the second millimeter wave detection result. According to the scheme provided in the embodiment of the present application, when the first case result indicates that the security inspection fails, based on the opposing infrared sensor, when it is determined that the security inspection object has not left the security inspection area, the first metal detection result and the new millimeter wave detection result are used to determine the second security inspection result, without the security inspection object leaving the security inspection area, avoiding the security inspection object exiting the security inspection area and re-entering, and adding an additional millimeter wave security inspection process, simplifying the secondary security inspection process, and improving security inspection efficiency.

[0048] The embodiments of the present application are further described below in conjunction with the accompanying drawings.

[0049] refer to Figure 1 , Figure 1 The present invention provides a millimeter wave security inspection method according to an embodiment of the present invention. The present invention provides a millimeter wave security inspection method, which is applied to a control device of a millimeter wave security inspection device. The millimeter wave security inspection device also includes a security inspection door, which is provided with a metal detector, a millimeter wave transmitting module and multiple groups of infrared sensors. The metal detector, the millimeter wave transmitting module and each group of multiple infrared sensors are respectively connected to the control device for communication. The method includes but is not limited to the following steps:

[0050] Step S10, acquiring the first output signals of all the opposing infrared sensors in real time, and determining the first person presence status in the security inspection area formed by the security door based on the first output signals.

[0051] Specifically, the embodiments of the present application do not involve any structural improvement of the incident infrared sensor, and those skilled in the art may select the appropriate one according to actual conditions.

[0052] Specifically, the infrared sensor and metal detector of this embodiment belong to the foot metal detector. The infrared sensor of this embodiment is arranged in the middle position of the inner side of the security door panel. In addition, the trigger source of starting the metal detector of this embodiment of the application is the first person presence state determined based on the output signal of the infrared sensor. Figure 2 The security gate shown can more effectively locate the security inspection object passing through the security gate. When the security inspection object passes through the security gate, the infrared sensor first senses the presence of the security inspection object (the first person presence state indicates the presence of a person in the security inspection area) and outputs a trigger signal. This signal ensures that the metal detector starts working only when the human body is in the correct position (i.e., the middle position of the security inspection area), thereby avoiding starting detection when the human body has not completely passed through the security gate or is in the wrong position, thereby improving the accuracy of detection.

[0053] Specifically, this embodiment does not limit the specific number of the infrared sensors in the security door, and those skilled in the art can select them according to actual needs. Figure 2 As shown, the security door is provided with two groups of opposing infrared sensors (opposing infrared sensor 1 and opposing infrared sensor 2).

[0054] Specifically, the through-beam infrared sensor of this embodiment includes a receiver and a transmitter, and the receiver and the transmitter are respectively arranged on the inner sides of two panels facing each other of the security door. Since the security door has at least two groups of through-beam infrared sensors, when a person of any body shape stands in the detection position of the security inspection area in a standard posture, the infrared light emitted by at least one infrared sensor is blocked and triggered.

[0055] Specifically, the first output signal of this embodiment has two types, one is a trigger signal (i.e., it is detected that the infrared light emitted by the corresponding opposing infrared sensor is blocked), and the other is a zeroing signal (it is detected that the infrared light emitted by the corresponding opposing infrared sensor changes from blocked to unblocked).

[0056] Specifically, in some embodiments, Figure 1 The step S10 of determining the first person presence state in the security inspection area formed by the security door based on the first output signal includes but is not limited to the following steps:

[0057] Step S11, encoding the first output signal of each opposing infrared sensor within a preset time period into a first 0-1 waveform;

[0058] Step S12, performing an OR operation on all the first 0-1 waveforms to obtain a second 0-1 waveform;

[0059] Step S13, determining the first person existence state based on the value of the second 0-1 waveform. When the second 0-1 waveform does not have a value of 1, determining that the first person existence state represents the presence of no person. When the second 0-1 waveform has a value of 1, determining that the first person existence state represents the presence of a person.

[0060] It can be understood that, in this embodiment, the first output signal of each opposing infrared sensor within a preset time period is encoded into a first 0-1 waveform, and all the first 0-1 waveforms are ORed to obtain a second 0-1 waveform, and the first person presence state is determined based on the value of the second 0-1 waveform. When the second 0-1 waveform does not have a value of 1, it is determined that the first person presence state indicates that no person is present, and when the second 0-1 waveform has a value of 1, it is determined that the first person presence state indicates that a person is present. Since different first output signals correspond to different groups of opposing infrared sensors within the same preset time period, this embodiment determines the first person presence state based on the value of the second 0-1 waveform obtained after the OR operation, that is, when it is detected that the infrared light emitted by any group of opposing infrared sensors is blocked, it is determined that the first person presence state indicates that a person is present, providing an effective data basis for triggering the metal detector.

[0061] In addition, the millimeter wave case method of this embodiment further provides the following steps:

[0062] Receive the trigger signal and zeroing signal from each group of infrared sensors, record the timestamp of the received signal and the sensor channel number of the corresponding infrared event, and restore the complete trigger change state of the sensor in the recent period through the infrared event, and provide an effective data basis for determining the starting timestamp of the entry of personnel into the security inspection area.

[0063] Step S20: When the first person presence status indicates that a person exists, the metal detector is triggered to operate, first metal quantity data sent by the metal detector is received, and a first metal detection result is generated based on the first metal quantity data.

[0064] In addition, in some embodiments, the first metal content data includes a plurality of metal content values ​​and a generation timestamp of each metal content value. Figure 1 Step S20 generates a first metal detection result based on the first metal quantity data, including but not limited to the following steps:

[0065] Step S21, determining a target timestamp based on the second 0-1 waveform, wherein the target timestamp is a timestamp corresponding to when a value in the second 0-1 waveform changes from 0 to 1 within a preset time period;

[0066] Step S22, generating a metal content history curve based on all metal content values ​​and corresponding generation timestamps;

[0067] Step S23, taking the target timestamp as the starting interception point, intercepting the target curve corresponding to the target period from the metal content history curve;

[0068] Step S24, generating a first metal detection result based on the metal amount value in the target curve, the preset metal amount threshold and the threshold of the over-threshold time ratio.

[0069] Specifically, when the first person presence state indicates the presence of a person, the metal detector is triggered to operate, the metal quantity data sent by the metal detector is received, and a metal quantity history curve is generated based on all the metal quantity values ​​and the corresponding generation timestamp. At this time, the calculated second 0-1 waveform has a value of 1, and the target timestamp is determined in the second 0-1 waveform, and the target timestamp is the timestamp corresponding to the change of the value from 0 to 1 in the second 0-1 waveform within the preset time period; then, taking the target timestamp as the starting interception point, the target curve corresponding to the target time period is intercepted from the metal quantity history curve, the target curve is analyzed, and the first metal detection result is generated based on the metal quantity value in the target curve, the preset metal quantity threshold and the threshold of the proportion of the over-threshold time length.

[0070] It is understandable that since metal detectors are sensitive to moving metals but not to stationary metals, when using metal detectors to perform metal detection on inspection objects entering the security inspection area formed by the security inspection gate, in order to ensure the accuracy of the metal quantity data obtained, it is necessary to determine the timestamp of the inspection object entering the security inspection area, so as to accurately extract the target curve of the key period from the metal quantity history curve for analysis, thereby ensuring the accuracy of the metal detection results.

[0071] In a specific embodiment, generating a first metal detection result based on the metal amount value in the target curve, the preset metal amount threshold and the threshold of the over-threshold duration ratio includes but is not limited to the following steps:

[0072] Step S241, obtaining the total duration corresponding to the metal value greater than the preset metal value threshold in the target curve;

[0073] Step S242, calculating the duration ratio between the total duration and the reference duration corresponding to the target curve;

[0074] Step S243, when the duration ratio is greater than the threshold value of the over-threshold duration ratio, determining that the first metal detection result is a detection failure;

[0075] Step S244: when the duration ratio is less than or equal to the threshold value of the over-threshold duration ratio, it is determined that the first metal detection result is a passed detection.

[0076] Specifically, for the metal content curve (i.e., target curve) within the target time period, whether an alarm is generated is determined by the following two parameters: a preset metal content threshold and a threshold for the proportion of time exceeding the threshold. That is, by calculating the sum of the durations corresponding to the metal content values ​​greater than the preset metal content threshold in the target curve, and calculating the duration proportion between the sum of the durations and the reference duration corresponding to the target curve, when the duration proportion is greater than the threshold for the proportion of time exceeding the threshold, it is determined that the first metal detection result is a failure to detect, and an alarm is generated at this time; when the duration proportion is less than or equal to the threshold for the proportion of time exceeding the threshold, it is determined that the first metal detection result is a pass to detect, and no alarm is generated.

[0077] Step S30, in response to the trigger signal, controlling the millimeter wave transmitting module to transmit millimeter waves in the security inspection area, and collecting radar echo data corresponding to the millimeter waves, generating a millimeter wave image according to a preset radar imaging algorithm and the radar echo data, and performing image recognition on the millimeter wave image based on a preset target recognition algorithm to obtain a millimeter wave detection result;

[0078] Specifically, this embodiment does not involve any improvement to the millimeter wave transmission module, and does not limit specific radar imaging algorithms and target recognition algorithms. Those skilled in the art may select them according to actual needs.

[0079] It can be understood that the process of controlling the millimeter wave transmitting module to transmit millimeter waves in the security inspection area, collecting radar echo data, generating millimeter wave images according to a preset radar imaging algorithm and radar echo data, and performing image recognition on the millimeter wave image based on a preset target recognition algorithm to obtain millimeter wave detection results requires the generation of millimeter wave images and target recognition. Therefore, it is necessary to determine that the security inspection object is in a static state in order to better ensure the accuracy of the millimeter wave detection results. Therefore, this embodiment sets a trigger condition for the operation of the millimeter wave transmitting module. After determining that the security inspection object is standing in the standard standing posture required by the millimeter wave test, a trigger signal is generated to control the operation of the millimeter wave transmitting module and subsequent millimeter wave image generation, millimeter wave detection result generation and other operations.

[0080] Specifically, the trigger signal of this embodiment can be generated by setting a camera in the security gate. When the image acquired by the camera automatically identifies and determines that the security object is standing in the standard standing posture required by the millimeter wave test, a trigger signal is generated; it can also be triggered by manually clicking a button, which can be triggered by the security object or the security staff.

[0081] In addition, in some embodiments, the millimeter wave security inspection device further includes a display terminal. Figure 1 In response to the trigger signal, step S30 controls the millimeter wave transmitting module to transmit millimeter waves in the security inspection area and collects radar echo data corresponding to the millimeter waves, including but not limited to the following steps:

[0082] Step S31, generating a trigger signal in response to a click operation of a security check start control in an interactive interface of the display terminal;

[0083] Step S32: In response to the trigger signal, the millimeter wave transmitting module transmits millimeter waves in the security inspection area and collects radar echo data corresponding to the millimeter waves.

[0084] Specifically, the millimeter wave security inspection equipment of this embodiment also includes a display terminal, and the interactive interface of the display terminal includes a security inspection start control. When the security inspection staff determines from the real-time monitoring video presented in the display terminal that the security inspection object is standing in the standard standing posture required by the millimeter wave test, they click the security inspection start control to generate a trigger signal. In response to the trigger signal, the millimeter wave transmission module transmits millimeter waves in the security inspection area and collects radar echo data corresponding to the millimeter waves, thereby ensuring the accuracy of the millimeter wave detection results.

[0085] Step S40, determining a first security inspection result based on the first metal detection result and the millimeter wave detection result, and when the first security inspection result indicates that the security inspection fails, in response to a trigger signal, re-controlling the millimeter wave transmission module to generate a second millimeter wave detection result.

[0086] Specifically, after performing step S40 of determining the first security inspection result based on the first metal detection result and the first millimeter wave detection result, the millimeter wave security inspection method of this embodiment further includes but is not limited to the following steps:

[0087] The first security check result is displayed on the interactive interface.

[0088] It can be understood that after obtaining the first metal detection result and the first millimeter wave detection result, determining the first security inspection result based on the first metal detection result and the first millimeter wave detection result and displaying the first security inspection result on the interactive interface can enable security inspection personnel to know the real-time situation of the security inspection object in a timely manner.

[0089] In addition, millimeter wave security inspection has clear requirements for standing posture. In actual use, secondary security inspection is often required. For example, when the result of the first security inspection indicates that the security inspection has failed, a second security inspection is required. In this embodiment, when the result of the first security inspection indicates that the security inspection has failed, the second output signal of all the opposing infrared sensors is obtained, which can provide an effective data basis for determining whether the inspected object has left the security inspection area and whether to continue the second metal detection.

[0090] Step S50, obtaining the second output signals of all the infrared sensors, determining the second person presence status in the security inspection area based on the second output signals, and when the second person presence status indicates the presence of a person, determining the second security inspection result based on the first metal detection result and the second millimeter wave detection result.

[0091] In some embodiments, the millimeter wave security inspection method further includes:

[0092] When the second person presence state indicates that no person is present, the metal detector is re-triggered to operate, and the second metal quantity data sent by the metal detector is received;

[0093] generating a second metal detection result based on the second metal quantity data;

[0094] A second security inspection result is determined based on the second metal detection result and the second millimeter wave detection result.

[0095] It should be noted that the specific principle steps for determining the presence status of the second person in this embodiment can refer to the specific steps for determining the presence status of the first person based on the first output signal in the above embodiment. The difference is that the generation timestamp of the second output signal for determining the presence status of the second person is different from the generation timestamp of the first output signal, which will not be elaborated here.

[0096] It can be understood that, when the first security check result indicates that the security check has not passed, referring to the description of the above embodiment, the display terminal is used to continuously monitor whether the security check object has left the security check area and whether it stands in the standard posture. When it is determined that the security check object has not left the security check area and is standing in the standard posture, a trigger signal is generated. In response to the trigger signal, a secondary security check is performed on the security check object: millimeter wave detection is performed on the security check object again. After obtaining the second millimeter wave detection result, this embodiment can continuously determine whether there is a security check object in the security check area through the opposing infrared sensor. When the second person presence status indicates that there is no person, the metal detector is re-triggered to operate, new metal quantity data sent by the metal detector is received, a second metal detection result is generated based on the new metal quantity data, and the second security check result is determined based on the second metal detection result and the second millimeter wave detection result. That is to say, when the first security check is invalid or fails, there is no need to move outside the security check area and then re-enter the security check area for a cumbersome process of re-checking, thereby simplifying the secondary security check process.

[0097] In addition, after performing step S50 of determining the second security inspection result based on the first metal detection result and the second millimeter wave detection result, the millimeter wave security inspection method of this embodiment further includes but is not limited to the following steps:

[0098] The second security check result is displayed on the interactive interface.

[0099] It is understandable that after obtaining the second security inspection result, displaying the second security inspection result on the interactive interface can enable the security inspection staff to know the real-time situation of the security inspection object in a timely manner.

[0100] like Figure 3 As shown, Figure 3 : is a structural diagram of a control device provided by an embodiment of the present application. The present invention also provides a control device 300, including:

[0101] The processor 310 may be implemented by a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of the present application;

[0102] The memory 320 can be implemented in the form of a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 320 can store an operating system and other applications. When the technical solution provided in the embodiment of this specification is implemented by software or firmware, the relevant program code is stored in the memory 320, and the processor 310 calls and executes the millimeter wave security inspection method of the embodiment of this application;

[0103] Input / output interface 330, used to implement information input and output;

[0104] Communication interface 340, used to realize communication interaction between the apparatus and other devices, which can be realized by wired means (such as USB, network cable, etc.) or wireless means (such as mobile network, WIFI, Bluetooth, etc.);

[0105] bus 350 , which transmits information between the various components of the device (e.g., processor 310 , memory 320 , input / output interface 330 , and communication interface 340 );

[0106] The processor 310 , the memory 320 , the input / output interface 330 and the communication interface 340 are connected to each other in communication within the device via the bus 350 .

[0107] In addition, an embodiment of the present application further provides an electronic device, including the control device 300 of the above embodiment.

[0108] In addition, an embodiment of the present application further provides a storage medium, which is a computer-readable storage medium and stores a computer program. When the computer program is executed by a processor, the above-mentioned millimeter wave security inspection method is implemented.

[0109] As a non-transient computer-readable storage medium, the memory can be used to store non-transient software programs and non-transient computer executable programs. In addition, the memory may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage devices. In some embodiments, the memory may optionally include a memory remotely arranged relative to the processor, and these remote memories may be connected to the processor via a network. Examples of the above-mentioned networks include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof. The device embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and are implemented to be located in one place, or may also be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment.

[0110] It will be appreciated by those skilled in the art that all or some of the steps and systems in the disclosed method above may be implemented as software, firmware, hardware and appropriate combinations thereof. Some physical components or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a microprocessor, or may be implemented as hardware, or may be implemented as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or a non-transitory medium) and a communication medium (or a temporary medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that may be used to store desired information and may be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically include computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0111] The above is a specific description of the preferred implementation of the present invention, but the present invention is not limited to the above-mentioned implementation mode. Technical personnel familiar with the field can also make various equivalent deformations or substitutions under the shared conditions without violating the spirit of the present invention. These equivalent deformations or substitutions are all included in the scope defined by the claims of the present invention.

Claims

1. A millimeter wave security inspection method, characterized in that: A control device applied to a millimeter wave security inspection device, wherein the millimeter wave security inspection device further comprises a security inspection door, wherein the security inspection door is provided with a metal detector, a millimeter wave transmitting module and a plurality of groups of opposing infrared sensors, wherein the metal detector, the millimeter wave transmitting module and each group of the plurality of opposing infrared sensors are respectively connected to the control device for communication, and the method comprises: Acquire the first output signals of all the opposing infrared sensors in real time, and determine the first person presence status in the security inspection area formed by the security door based on the first output signals; When the first person presence status indicates that a person is present, the metal detector is triggered to operate, first metal quantity data sent by the metal detector is received, and a first metal detection result is generated based on the first metal quantity data; In response to the trigger signal, the millimeter wave transmitting module is controlled to transmit the millimeter wave in the security inspection area, and radar echo data corresponding to the millimeter wave is collected, a millimeter wave image is generated according to a preset radar imaging algorithm and the radar echo data, and image recognition is performed on the millimeter wave image based on a preset target recognition algorithm to obtain a first millimeter wave detection result; determining a first security inspection result based on the first metal detection result and the millimeter wave detection result, and when the first security inspection result indicates that the security inspection fails, in response to the trigger signal, re-controlling the millimeter wave transmission module to operate to generate a second millimeter wave detection result; Acquire the second output signals of all the through-beam infrared sensors, determine the second person presence status of the security inspection area based on the second output signals, and when the second person presence status indicates the presence of a person, determine the second security inspection result based on the first metal detection result and the second millimeter wave detection result.

2. The millimeter wave security inspection method according to claim 1, characterized in that: Determining a first person presence state in the security inspection area formed by the security door based on the first output signal includes: Encoding the first output signal of each opposing infrared sensor within a preset time period into a first 0-1 waveform; Performing an OR operation on all of the first 0-1 waveforms to obtain a second 0-1 waveform; The first person existence state is determined based on the value of the second 0-1 waveform. When the second 0-1 waveform does not have a value of 1, it is determined that the first person existence state represents the presence of no person. When the second 0-1 waveform has a value of 1, it is determined that the first person existence state represents the presence of a person.

3. The millimeter wave security inspection method according to claim 2, characterized in that: The first metal quantity data includes a plurality of metal quantity values ​​and a generation timestamp of each of the metal quantity values. Generating a first metal detection result based on the first metal quantity data includes: Determine a target timestamp based on the second 0-1 waveform, wherein the target timestamp is a timestamp corresponding to a change in a value from 0 to 1 in the second 0-1 waveform within the preset time period; Generate a metal content history curve based on all the metal content values ​​and the corresponding generation timestamps; Taking the target timestamp as the starting interception point, intercepting the target curve corresponding to the target period from the metal content history curve; The first metal detection result is generated based on the metal amount value in the target curve, a preset metal amount threshold and an over-threshold time ratio threshold.

4. The millimeter wave security inspection method according to claim 3, characterized in that: The first metal detection result is generated based on the metal amount value in the target curve, the preset metal amount threshold and the threshold of the over-threshold time ratio, including: Obtaining the sum of the durations corresponding to the metal value greater than the preset metal value threshold in the target curve; Calculate the duration ratio between the total duration and the reference duration corresponding to the target curve; When the duration ratio is greater than the threshold of the over-threshold duration ratio, determining that the first metal detection result is a detection failure; When the duration ratio is less than or equal to the over-threshold duration ratio threshold, it is determined that the first metal detection result is a passed detection.

5. The millimeter wave security inspection method according to claim 1, characterized in that: The method further comprises: When the second person presence status indicates that no person is present, re-triggering the metal detector to operate, and receiving the second metal quantity data sent by the metal detector; generating a second metal detection result based on the second metal quantity data; The second security inspection result is determined based on the second metal detection result and the second millimeter wave detection result.

6. The millimeter wave security inspection method according to claim 1, characterized in that: The millimeter wave security inspection equipment further includes a display terminal, which is in communication with the control device and controls the millimeter wave transmitting module to transmit millimeter waves in the security inspection area in response to a trigger signal, and collects radar echo data corresponding to the millimeter waves, including: generating the trigger signal in response to a click operation of a security check start control in an interactive interface of the display terminal; In response to the trigger signal, the millimeter wave transmitting module transmits millimeter waves in the security inspection area and collects the radar echo data corresponding to the millimeter waves.

7. The millimeter wave security inspection method according to claim 6, characterized in that: After determining a first security inspection result based on the first metal detection result and the first millimeter wave detection result, the method further includes: Displaying the first security inspection result on the interactive interface; After determining a second security inspection result based on the first metal detection result and the second millimeter wave detection result, the method further includes: The second security check result is displayed on the interactive interface.

8. A control device, characterized in that: It includes at least one control processor and a memory for communicating with the at least one control processor; the memory stores instructions that can be executed by the at least one control processor, and the instructions are executed by the at least one control processor to enable the at least one control processor to execute the millimeter wave security inspection method as described in any one of claims 1 to 7.

9. An electronic device, characterized in that: Comprising the control device as claimed in claim 8.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the millimeter wave security inspection method as described in any one of claims 1 to 7.

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