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

Abstract

The application discloses a millimeter wave security inspection method, device, equipment and storage medium. The method comprises the following steps: determining a first person presence state based on an output signal of a pair-infrared sensor; triggering a metal detector and generating a metal detection result when a person is present; controlling a millimeter wave emission module to operate and calculating a millimeter wave detection result based on a trigger signal; determining a first security inspection result based on the metal detection result and the millimeter wave detection result; when the first security inspection result is not passed, and it is determined that a person is present in the security inspection area based on the pair-infrared sensor, a new millimeter wave detection result is generated again, and a second security inspection result is determined based on the metal detection result and the new millimeter wave detection result. When the first security inspection result is not passed, and it is determined that the security inspection object does not leave the security inspection area based on the pair-infrared sensor, the second security inspection result is determined by using the first metal detection result and the new millimeter wave detection result, so that the security inspection object does not need to leave the security inspection area, and the secondary security inspection 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, apparatus, device, and storage medium. Background Art

[0002] Millimeter-wave security inspection systems are now widely used in airports, subways, train stations, and other locations requiring personnel screening. Millimeter-wave security inspection devices can detect contraband through millimeter-wave imaging, effectively improving security inspection efficiency. However, millimeter-wave security inspection systems can only penetrate clothing, not most shoes. This makes it difficult to effectively image and inspect the feet, making them a blind spot for millimeter-wave security inspections.

[0003] In order to make up for the foot security inspection loopholes 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) When the millimeter wave security inspection is invalid and needs to be re-inspected, the person being inspected needs to exit the security inspection area and then re-enter, 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 the next person can be inspected, which results in 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 also includes a security inspection door, and the security inspection door is provided with a metal detector, a millimeter wave transmission module, and multiple groups of infrared sensors. The metal detector, the millimeter wave transmission module, and each group of the multiple infrared sensors are respectively communicatively connected to the control device. The method includes:

[0006] Acquire first output signals of all the opposing infrared sensors in real time, and determine a 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 millimeter waves in the security check area, and radar echo data corresponding to the millimeter waves 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] Based on the first metal detection result and the millimeter wave detection result, a first security check result is determined, and when the first security check result indicates that the security check fails, the millimeter wave transmitting module is re-controlled to operate to generate a second millimeter wave detection result in response to the trigger signal.

[0010] The second output signals of all the pair of infrared sensors are acquired, and a second person presence state of the security check area is determined based on the second output signals, and when the second person presence state indicates that a person is present, a second security check result is determined based on the first metal detection result and the second millimeter wave detection result.

[0011] In some embodiments, determining the first person presence state of the security check area formed by the security door based on the first output signals comprises:

[0012] The first output signals of each pair of infrared sensors in a preset time period are coded into a first 0-1 waveform;

[0013] All the first 0-1 waveforms are ORed to obtain a second 0-1 waveform;

[0014] Based on the numerical value of the second 0-1 waveform, the first person presence state is determined, when the second 0-1 waveform does not have a numerical value 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 numerical value 1, it is determined that the first person presence state indicates that a person is present.

[0015] In some embodiments, the first metal amount data includes a plurality of metal amount numerical values and a generation time stamp of each metal amount numerical value, and the first metal detection result is generated based on the first metal amount data, comprising:

[0016] Based on the second 0-1 waveform, a target time stamp is determined, wherein the target time stamp is a time stamp corresponding to a change from 0 to 1 in the second 0-1 waveform in the preset time period;

[0017] Based on all the metal amount numerical values and the corresponding generation time stamps, a metal amount history curve is generated;

[0018] Taking the target time stamp as a starting intercept point, a target curve corresponding to a target period is intercepted from the metal amount 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 a threshold of the proportion of the exceeding threshold time.

[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 a threshold for the proportion of the duration exceeding the threshold includes:

[0021] Obtaining the total duration of the metal content values ​​greater than the preset metal content threshold value in the target curve;

[0022] Calculating 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 value of the over-threshold duration ratio, determining that the first metal detection result is a failure;

[0024] 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.

[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 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:

[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 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 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, apparatus, 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, and generating a first metal detection result based on the preset radar imaging algorithm and the radar echo data. The method generates a millimeter wave image based on the data, and performs image recognition on the millimeter wave image based on a preset target recognition algorithm to obtain a first millimeter wave detection result; determines a first security inspection result based on the first metal detection result and the millimeter wave detection result; when the first security inspection result indicates that the security inspection has not been passed, in response to the trigger signal, re-controls the millimeter wave transmission module to generate a second millimeter wave detection result; obtains the second output signals of all the through-beam infrared sensors, determines a second person presence status of the security inspection area based on the second output signals, and when the second person presence status indicates that a person is present, determines a second security inspection result based on the first metal detection result and the second millimeter wave detection result. According to the solution provided in the embodiment of the present application, when the first case result indicates that the security inspection has not been passed, if the through-beam infrared sensor determines that the inspected person 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 inspected person leaving the security inspection area, avoiding the situation where the inspected person exits the security inspection area and then re-enters, which adds 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 This is a flowchart of the steps of the millimeter wave security inspection method provided by one embodiment of the present application;

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

[0042] Figure 3 This 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 solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

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

[0045] At present, the millimeter wave security inspection system has been widely used in the scenes of airport, subway, railway station and other places where personnel security inspection is required. The millimeter wave security inspection device can detect contraband through millimeter wave imaging, effectively improving the security inspection efficiency. However, the principle of millimeter wave security inspection can only penetrate the clothes on the surface of the human body, and it is difficult to penetrate most shoes, and it is impossible to effectively image and inspect the feet of the human body. Therefore, the feet have become the blind area of the millimeter wave security inspection.

[0046] In order to make up for the foot security inspection loophole of the millimeter wave security inspection system, it has become the development trend of the industry to integrate the millimeter wave security inspection system with foot detection function. However, the current millimeter wave equipment with foot metal detection function has the following shortcomings: (1) the current millimeter wave equipment with foot metal detection function needs to clearly define the entrance and exit directions of the equipment; (2) the current millimeter wave equipment with foot metal detection function needs to be rechecked when the millimeter wave security inspection is invalid in the same time, and the person to be inspected needs to exit the security inspection area and then enter again, which additionally increases the business process of the millimeter wave security inspection; (3) the current millimeter wave equipment with foot metal detection function needs the security inspector to confirm that the person to be inspected has completely left the channel before the next person is inspected, which leads to low security inspection efficiency of the millimeter wave security inspection system.

[0047] In order to solve the above-mentioned problems, the embodiments of the present application provide a millimeter wave security inspection method, device, equipment, and storage medium, the method comprising: acquiring the first output signals of all the said 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 the radar echo data corresponding to the millimeter wave, and generating a first metal detection result based on the preset radar imaging algorithm and the The radar echo data generates a millimeter wave image, 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; a first security inspection result is determined based on the first metal detection result and the millimeter wave detection result; when the first security inspection result indicates that the security inspection has not been passed, in response to the trigger signal, the millimeter wave transmission module is re-controlled to operate to generate a second millimeter wave detection result; the second output signals of all the through-beam infrared sensors are obtained, and a second person presence status of the security inspection area is determined based on the second output signals; when the second person presence status indicates that a person is present, a second security inspection result is determined based on the first metal detection result and the second millimeter wave detection result. According to the solution provided in the embodiment of the present application, when the first case result indicates that the security inspection has not been passed, if the through-beam infrared sensor determines that the inspected person 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 inspected person leaving the security inspection area, avoiding the situation where the inspected person exits the security inspection area and then re-enters, which adds 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 with reference to the accompanying drawings.

[0049] refer to Figure 1 , Figure 1 This is a flowchart of the steps of a millimeter wave security inspection method provided by an embodiment of the present application. The 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. The millimeter wave security inspection device also includes a security inspection door, which is provided with a metal detector, a millimeter wave transmission module, and multiple groups of infrared sensors. The metal detector, the millimeter wave transmission 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 first output signals of all the opposing infrared sensors in real time, and determining a 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 structural improvements of the infrared sensor, and those skilled in the art can select as needed.

[0052] Specifically, the pair of infrared sensors and the metal detector in the embodiments belong to the foot metal detector, the pair of infrared sensors in the embodiments are arranged at the middle position of the inner side of the security door panel, and the trigger source for starting the metal detector to work in the embodiments of the present application is the first person existence state determined based on the output signal of the infrared sensor, referring to Figure 2 The security door shown in the figure can more effectively position the security object passing through the security door. When the security object passes through the security door, the infrared sensor first senses the existence of the security object (the first person existence state represents that there is a person in the security area), and outputs a trigger signal. This signal ensures that the metal detector starts to work only when the human body is in the correct position (i.e. the middle position of the security area), thereby avoiding starting detection when the human body has not completely passed through the security door or is in the wrong position, and improving the accuracy of detection.

[0053] Specifically, the embodiments of the present application do not limit the specific number of the pair of infrared sensors in the security door, and those skilled in the art can select as needed according to actual needs. As shown in Figure 2 The security door is provided with two groups of pair of infrared sensors (pair of infrared sensors 1 and pair of infrared sensors 2).

[0054] Specifically, the pair of infrared sensors in the embodiments include a receiver and a transmitter, and the receiver and the transmitter are arranged on the inner sides of the two panels of the security door opposite to each other. Since the security door has at least two groups of pair of infrared sensors, when a person of any body shape stands in the detection position of the security area in a standard posture, at least one infrared light emitted by the infrared sensor is blocked to trigger.

[0055] Specifically, the first output signal in the embodiments has two types, one is a trigger signal (i.e. the infrared light emitted by the corresponding pair of infrared sensors is detected to be blocked), and the other is a zero return signal (the infrared light emitted by the corresponding pair of infrared sensors is detected to change from blocked to unblocked).

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

[0057] Step S11, encode the first output signal of each pair of infrared sensors in the preset time period into a first 0-1 waveform;

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

[0059] Step S13, determining the first person presence state 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. 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.

[0060] It will be understood that this embodiment encodes the first output signal of each opposing infrared sensor within a preset time period into a first 0-1 waveform, and performs an OR operation on all the first 0-1 waveforms to obtain a second 0-1 waveform. 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, the first person presence state is determined to indicate the absence of a person. When the second 0-1 waveform has a value of 1, the first person presence state is determined to indicate the presence of a person. Because 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, the first person presence state is determined to indicate the presence of a person, 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 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.

[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 of generating a first metal detection result based on the first metal quantity data includes but is 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 the 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 percentage of the duration exceeding the threshold.

[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 contains a value of 1, and the target timestamp is determined in the second 0-1 waveform, which is the timestamp corresponding to the change from 0 to 1 in the second 0-1 waveform within the preset time period; then, with 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 metal but not to stationary metal, when using metal detectors to detect metal 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 security object entering the security inspection area, so as to accurately intercept 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 content value in the target curve, a preset metal content threshold, and a threshold of the percentage of time exceeding the threshold includes but is not limited to the following steps:

[0072] Step S241, obtaining the total duration corresponding to the metal content value greater than the preset metal content 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: if the duration ratio is greater than the threshold value of the over-threshold duration ratio, the first metal detection result is determined to be a 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 passed.

[0076] Specifically, for the metal content curve within the target time period (i.e., the target curve), 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 ​​in the target curve that are greater than the preset metal content threshold, and calculating the duration ratio between the sum of the durations and the reference duration corresponding to the target curve, if the duration ratio is greater than the threshold for the proportion of time exceeding the threshold, the first metal detection result is determined to be a failure, and an alarm is generated; if the duration ratio is less than or equal to the threshold for the proportion of time exceeding the threshold, the first metal detection result is determined to be a pass, and no alarm is generated.

[0077] Step S30: In response to the trigger signal, the millimeter wave transmitting module is controlled to transmit millimeter waves in the security inspection area, and radar echo data corresponding to the millimeter waves 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 millimeter wave detection result.

[0078] Specifically, this embodiment does not involve any improvement to the millimeter wave transmission module, nor does it 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 obtained by the camera is automatically recognized to determine 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 equipment 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. After 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; when the first security inspection result indicates that the security inspection fails, in response to a trigger signal, re-controlling the millimeter wave transmitting module to generate a second millimeter wave detection result.

[0086] Specifically, after executing 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 inspections have clear requirements for standing posture, and in actual use, secondary security inspections are often required. For example, when the first security inspection result indicates that the security inspection has failed, a second security inspection is required. In this embodiment, when the first security inspection result indicates that the security inspection has failed, the second output signal of all the through-beam 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] In step S50, the second output signal of the all-around infrared sensor is acquired, the second person presence state of the security check area is determined based on the second output signal, when the second person presence state represents that there is a person, the second security check result is determined based on the first metal detection result and the second millimeter wave detection result.

[0091] In some embodiments, the millimeter wave security check method further comprises:

[0092] When the second person presence state represents that there is no person, the metal detector is retriggered to operate, and the second metal amount data sent by the metal detector is received;

[0093] The second metal detection result is generated based on the second metal amount data;

[0094] The second security check 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 of determining the second person presence state in the embodiment can refer to the specific steps of determining the first person presence state based on the first output signal in the above-mentioned embodiments, and the difference is that the generation time stamp of the second output signal for determining the second person presence state is different from the generation time stamp of the first output signal, and no more description is made here.

[0096] It can be understood that in the case that the first security check result represents that the security check is not passed, referring to the description of the above-mentioned embodiments, it is continuously monitored through the display terminal whether the security check object leaves the security check area and whether it stands according to the standard standing posture, when it is determined that the security check object does not leave the security check area and stands according to the standard standing posture, a trigger signal is generated, and the security check object is subjected to secondary security check in response to the trigger signal: after the millimeter wave detection of the security check object is re-performed to obtain the second millimeter wave detection result, the all-around infrared sensor is continuously used to judge whether there is a security check object in the security check area in the embodiment, when the second person presence state represents that there is no person, the metal detector is retriggered to operate, and the new metal amount data sent by the metal detector is received, the second metal detection result is generated based on the new metal amount 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, in the case that the first security check is invalid or fails, there is no need to go out of the security check area and then re-enter the security check area for re-security check, and the secondary security check process is simplified.

[0097] In addition, after the step S50 of determining the second security check result based on the first metal detection result and the second millimeter wave detection result is performed, the millimeter wave security check method of the embodiment further comprises 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 in one embodiment of the present application. The present invention also provides a control device 300, comprising:

[0101] The processor 310 may be implemented as a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is configured 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 application programs. When the technical solutions provided in the embodiments of this specification are implemented through software or firmware, the relevant program code is stored in the memory 320 and is called by the processor 310 to execute the millimeter wave security inspection method of the embodiments of this application;

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

[0104] Communication interface 340, used to implement communication interaction between the apparatus and other devices, which can be achieved through 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] The memory, as a non-transient computer-readable storage medium, 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 device. In some embodiments, the memory optionally includes a memory remotely located relative to the processor, and these remote memories can 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 located in one place, or may 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] Those skilled in the art will appreciate that all or some of the steps and systems in the method disclosed above can be implemented as software, firmware, hardware, and appropriate combinations thereof. Some physical components or all physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, and the computer-readable medium can include computer storage media (or non-transitory media) and communication media (or temporary media). As known to those skilled in the art, the term computer storage media is included in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data) and is volatile and non-volatile, removable, and non-removable. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory, or other memory technology, 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 can be used to store desired information and can be accessed by a computer. Furthermore, as is well known to those skilled in the art, communication media typically includes 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 implementation. Those skilled in the art can also make various equivalent modifications or substitutions under the shared conditions that do not violate the spirit of the present invention. These equivalent modifications 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 millimeter wave security inspection equipment, the millimeter wave security inspection equipment also including a security inspection door, the security inspection door being 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 the multiple groups of infrared sensors being respectively communicatively connected to the control device, the millimeter wave security inspection equipment also including a display terminal, the display terminal being communicatively connected to the control device, the method comprising: Acquire first output signals of all the through-beam infrared sensors in real time, and determine a first person presence status in the security inspection area formed by the security inspection 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 a trigger signal, controlling the millimeter wave transmitting module to transmit millimeter waves in the security inspection area, collecting radar echo data corresponding to the millimeter waves, generating a millimeter wave image based on 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 first millimeter wave detection result; determining a first security inspection result based on the first metal detection result and the millimeter wave detection result; when the first security inspection result indicates that the security inspection has failed, continuously monitoring, via a display terminal, whether the inspected person has left the security inspection area and whether the inspected person is standing in a standard posture; when it is determined that the inspected person has not left the security inspection area and is standing in a standard posture, generating a trigger signal; and in response to the trigger signal, re-controlling the millimeter wave transmission module to generate a second millimeter wave detection result; Obtaining second output signals of all the through-beam infrared sensors, determining a 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 a second security inspection result based on the first metal detection result and the second millimeter wave detection result; In response to a 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 includes: 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; 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: Encoding a 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; Determine a target timestamp based on the second 0-1 waveform, wherein the target timestamp is a timestamp corresponding to when the value in the second 0-1 waveform changes from 0 to 1 within the preset time period; generating a metal content history curve based on all the metal content values ​​and the corresponding generation timestamps; Taking the target timestamp as a starting interception point, intercepting a target curve corresponding to a 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 a threshold of the proportion of the exceeding threshold time.

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 inspection door based on the first output signal includes: The first person presence status 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 status indicates that no person is present. When the second 0-1 waveform has a value of 1, it is determined that the first person presence status indicates that a person is present.

3. The millimeter wave security inspection method according to claim 1, characterized in that: Generating the first metal detection result based on the metal amount value in the target curve, a preset metal amount threshold, and a threshold of the proportion of the time duration exceeding the threshold, includes: Obtaining the total duration of the metal content values ​​greater than the preset metal content threshold value in the target curve; Calculating 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 value of the over-threshold duration ratio, determining that the first metal detection result is a failure; 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.

4. 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.

5. The millimeter wave security inspection method according to claim 1, 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.

6. 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 5.

7. An electronic device, characterized in that: Includes the control device according to claim 6.

8. 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 according to any one of claims 1 to 5.

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