Contraband security gate detection device
By incorporating a rotating passage and limiting components into the security gate, multiple detection methods and effective blocking of dangerous individuals are achieved, solving the problems of false alarms and lack of blocking capability in existing security gates, and improving the accuracy and security of security checks.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG MAIDEN SAFETY EQUIP CO LTD
- Filing Date
- 2025-08-20
- Publication Date
- 2026-06-23
AI Technical Summary
Most existing electromagnetic induction contraband detection gates only have one set of detection modules, which is prone to false alarms. Furthermore, the gate structure is relatively simple and lacks the ability to block dangerous individuals, making it difficult to effectively prevent dangerous individuals carrying knives from escaping.
Design a security gate detection device for prohibited items. The device uses a rotating channel formed by the outer shell and the column. It is equipped with three sets of electromagnetic transmitters and receivers for repeated detection. A detection camera is installed at the entrance. A limit component controls the barrier bar to stop rotating when a dangerous person is detected, thus preventing escape.
Repeated detection reduces false alarm rates and effectively prevents dangerous individuals from escaping, improving the accuracy and security of security checks and preventing injuries.
Smart Images
Figure CN224399615U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of security gate technology, and in particular to a security gate detection device for prohibited items. Background Technology
[0002] Contraband security gates (also known as metal detectors or security screening gates) are electronic devices used to screen people for dangerous items (such as weapons, explosives, drugs, etc.) and are widely used in airports, train stations, prisons, large events and other places.
[0003] Security gates for prohibited items come in various types based on their operating principles. The most widely used is the electromagnetic induction-based security gate. This gate, resembling a door frame, has an electromagnetic transmitter and receiver on either side. It emits a low-frequency electromagnetic field, which is disturbed when a metal object passes through, triggering an alarm. The sensitivity can be adjusted to distinguish between small metal items (such as coins) and large dangerous items (such as knives).
[0004] Most existing electromagnetic induction contraband security gates only have one detection module, which is prone to false alarms, thus affecting the normal passage of personnel. In addition, the security gate structure is relatively simple and lacks the ability to block dangerous personnel. When a dangerous person carrying a knife is detected, the dangerous person may use the knife to suddenly attack and injure people in an attempt to escape. Furthermore, the existing security gates do not have the function of detecting and blocking escapees. Utility Model Content
[0005] To overcome the problems that most security gates only have one detection module, which is prone to false alarms, and that the security gate structure is relatively simple and lacks the ability to block dangerous personnel.
[0006] The technical solution of this utility model is as follows: a contraband security gate detection device, comprising a shell, a blocking crossbar, and a drive assembly. The shell is roughly a vertically cleaved hollow cylinder. A column is arranged on the inner side of the shell, an electromagnetic transmitter is arranged on the outer side of the column, and an electromagnetic receiver is arranged on the inner side of the shell. The electromagnetic transmitter and the electromagnetic receiver are arranged in pairs around the axis of the column at a 90-degree angle. A rotating blocking crossbar is arranged on the outer side of the column. A drive assembly is arranged on the top of the shell, a limit assembly is arranged on the top of the shell, and a detection camera is arranged on the top of the shell. A partition wall is arranged on one side of the shell to divide the space into an entrance side and an exit side. The detection camera is located on the entrance side, and the other side of the partition wall is the exit side.
[0007] Preferably, a connecting column is provided on the outside of the column, and three sets of connecting columns are equidistant around the circumference. A gap larger than the thickness of the electromagnetic transmitter is left between the connecting column and the column. Connecting rings are provided at the upper and lower ends of the connecting column. The connecting column, the connecting rings and the blocking crossbar are fixedly connected. A gear is fixedly connected above the upper connecting ring.
[0008] Preferably, the bottom end of the column is provided with a thrust bearing for supporting the connecting ring, and the top end of the column is provided with a roller bearing for maintaining the distance between the connecting column and the column.
[0009] Preferably, the drive assembly includes a drive motor, a pulley, and a transmission belt. The drive motor is located on the top of the housing, the pulley is located at the output end of the drive motor and above the gear, and the transmission belt is located on the outer side of the pulley.
[0010] Preferably, a grating box is provided above the pulley. The grating box is hollow and has light-transmitting grooves on its side walls. Light emitters and light receivers are provided on both sides of the grating box, and the line connecting the light emitters and light receivers passes through the center of the grating box.
[0011] Preferably, the limiting component includes a toothed ring, a tension spring, and an electromagnet. A toothed ring is provided on one side of the gear, and a fixed seat is provided on the side of the toothed ring away from the gear. The fixed seat is fixedly connected to the housing, and a tension spring is provided in the space between the fixed seat and the toothed ring.
[0012] Preferably, a guide rod is provided on the side of the toothed ring near the fixed seat, the guide rod is slidably connected to the fixed seat, a low carbon steel block is provided on one side of the guide rod, and an electromagnet is provided on the side of the low carbon steel block near the toothed ring, the electromagnet is fixedly connected to the outer shell.
[0013] The beneficial effects of this utility model are:
[0014] By setting up a rotating channel between the outer shell and the pillars, and installing three sets of electromagnetic transmitters and receivers inside the channel for repeated detection, the error rate of detection is reduced. At the entrance, a detection camera is used to detect faces. When a dangerous person carrying a dangerous knife is detected or an escapee is detected, the limit component can be used to limit the rotation of the barrier bar while the person is being detected inside the outer shell, thus trapping the person inside the outer shell and preventing the person from escaping or suddenly attacking with a knife. Attached Figure Description
[0015] Figure 1 The diagram shown is a three-dimensional structural schematic of this utility model;
[0016] Figure 2 The diagram shown is a three-dimensional structural schematic of the column of this utility model;
[0017] Figure 3 The diagram shown is a three-dimensional structural schematic of the barrier crossbar of this utility model.
[0018] Figure 4 The diagram shown is a three-dimensional structural schematic of the drive component of this utility model;
[0019] Figure 5The diagram shown is a three-dimensional structural schematic of the limiting component of this utility model;
[0020] Figure 6 The diagram shown is a top view of the structure of this utility model in the blocking state.
[0021] Explanation of reference numerals in the attached drawings: 1. Outer shell; 101. Partition wall; 102. Column; 201. Electromagnetic transmitter; 202. Electromagnetic receiver; 3. Barrier crossbar; 301. Connecting column; 302. Connecting ring; 303. Thrust bearing; 304. Roller bearing; 4. Gear; 5. Detection camera; 6. Drive motor; 601. Pulley; 602. Transmission belt; 701. Grating box; 702. Light transmission groove; 703. Light emitter; 704. Light receiver; 8. Gear ring; 801. Guide rod; 802. Fixing base; 803. Tension spring; 804. Low carbon steel block; 9. Electromagnet. Detailed Implementation
[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0023] Please see Figures 1-6 This utility model provides an embodiment of a contraband security gate detection device, comprising a housing 1, a blocking crossbar 3, and a drive assembly. The housing 1 is generally a vertically cleaved hollow cylinder. A column 102 is disposed on the inner side of the housing 1, and an electromagnetic transmitter 201 is disposed on the outer side of the column 102. An electromagnetic receiver 202 is disposed on the inner side of the housing 1. The electromagnetic transmitter 201 and the electromagnetic receiver 202 are arranged in pairs around the axis of the column 102 at a 90-degree angle. A rotating blocking crossbar 3 is disposed on the outer side of the column 102. A drive assembly is disposed above the housing 1, a limit assembly is disposed above the housing 1, and a detection camera 5 is disposed above the housing 1. A partition wall 101 is provided on one side of the outer shell 1 to divide the space into an entrance side and an exit side. The detection camera 5 is located on the entrance side, and the other side of the partition wall 101 is the exit side. The outer shell 1 and the column 102 form a rotating channel, and three sets of electromagnetic transmitters 201 and electromagnetic receivers 202 are set in the channel to perform repeated detection, reducing the detection error rate. At the entrance, the detection camera 5 detects faces. When a dangerous person carrying a dangerous knife is detected or an escapee is detected, the limit component can be used to limit the rotation of the barrier bar 3 while the person is being detected inside the outer shell 1, thus confining the person inside the outer shell 1 and preventing the person from escaping or using a knife to suddenly attack and injure people.
[0024] Please see Figure 3In this embodiment, a connecting post 301 is provided on the outer side of the column 102. Three sets of connecting posts 301 are equidistantly arranged around the circumference. A gap larger than the thickness of the electromagnetic transmitter 201 is left between the connecting post 301 and the column 102. Connecting rings 302 are provided at the upper and lower ends of the connecting post 301. The connecting post 301, the connecting rings 302, and the blocking crossbar 3 are fixedly connected. A gear 4 is fixedly connected above the upper connecting ring 302. A support for the connecting rings 302 is provided at the bottom end of the column 102. The thrust bearing 303 of the 2 is provided at the upper end of the column 102, and the roller bearing 304 is provided to maintain the distance between the connecting column 301 and the column 102. The thrust bearing 303 is used to bear the weight of the blocking crossbar 3, the connecting column 301 and the connecting ring 302 and is rotatably connected to the column 102. The roller bearing 304 is used to maintain the distance between the connecting column 301 and the column 102. When rotating, the gear 4 receives power to drive the connecting column 301 and the connecting ring 302 to rotate, thereby causing the blocking crossbar 3 to rotate.
[0025] Please see Figure 4 In this embodiment, the driving assembly includes a drive motor 6, a pulley 601, and a transmission belt 602. The drive motor 6 is located on the top of the housing 1. The pulley 601 is located above the output end of the drive motor 6 and the gear 4. The transmission belt 602 is located on the outer side of the pulley 601. A grating box 701 is located above the pulley 601. The grating box 701 is hollow and has a light-transmitting groove 702 on its side wall. A light emitter 703 and a light receiver 704 are located on both sides of the grating box 701. The line connecting the light emitter 703 and the light receiver 704 passes through the center of the grating box 701. The drive motor 6 transmits power through the pulley 601 and the transmission belt 602 to drive the gear 4 to rotate. The grating box 701 is connected to the gear 4 by a keyway and rotates with the gear 4. Light is emitted from the light receiver 704 and the grating box 701 by the light 703. During the rotation of the gear 4, the light continuously passes through the light-transmitting groove 702 and is blocked by the grating box 701. The light receiver 704 receives the light intermittently, thereby generating different electrical signals. Each change in the electrical signal represents the grating box 701 rotating through a certain angle, thus recording the angle and number of rotations of the gear 4. This forms a closed-loop control with the drive motor 6. The resistance sensor in the drive motor 6 detects the output torque. When the limit component blocks the gear 4, or when a person stops walking and comes into contact with the barrier bar 3, generating resistance, the drive motor 6 is de-energized to prevent damage or injury to the person. The drive motor 6 starts intermittently and detects the resistance, so that the barrier bar 3 rotates normally when the resistance disappears.
[0026] Please see Figure 5In this embodiment, the limiting component includes a toothed ring 8, a tension spring 803, and an electromagnet 9. A toothed ring 8 is provided on one side of the gear 4, and a fixed seat 802 is provided on the side of the toothed ring 8 away from the gear 4. The fixed seat 802 is fixedly connected to the outer casing 1. A tension spring 803 is provided in the space between the fixed seat 802 and the toothed ring 8. A guide rod 801 is provided on the side of the toothed ring 8 near the fixed seat 802, and the guide rod 801 is slidably connected to the fixed seat 802. A low-carbon steel block 804 is provided on one side of the guide rod 801, and an electromagnet 9 is provided on the side of the low-carbon steel block 804 near the toothed ring 8. The electromagnet 9 is fixedly connected to the outer casing 1. When it is necessary to block personnel, the electromagnet 9 is energized to generate magnetic force that attracts the low-carbon steel block 804, causing the toothed ring 8 to move towards the gear 4 and mesh with it, preventing the gear 4 from rotating. This stops the blocking bar 3 from blocking personnel. When the power is off, the tension spring 803 pulls the toothed ring 8 back, preventing ordinary personnel from being trapped due to an accidental power outage.
[0027] Please see Figure 6 In this embodiment, the figure shows the stopping position of the blocking bar 3 when blocking personnel. There is a certain gap between the blocking bar 3 at the entrance and the blocking bar 3, so that when blocking dangerous personnel or escapers at the exit, ordinary personnel who have just entered the shell 1 can leave the shell 1. Dangerous personnel at the exit need to hand over objects such as knives through the gap between the blocking bars 3, and can only be released by the operator manually controlling the contact barrier after passing the detection again.
[0028] In use, personnel enter the outer casing 1 sequentially through the entrance of the outer casing 1. The drive motor 6 transmits power through the pulley 601 and the transmission belt 602 to drive the gear 4 to rotate. The grating box 701 is connected to the gear 4 by a keyway and rotates with the gear 4. The light emitter 703 emits light to the light receiver 704 and the grating box 701. During the rotation of the gear 4, the light continuously passes through the light-transmitting groove 702 and is blocked by the grating box 701. The light receiver 704 receives the light intermittently, thereby generating different electrical signals. Each change in the electrical signal represents the grating box 701 rotating through a certain angle, thereby recording the angle and number of rotations of the gear 4. This forms a closed-loop control with the drive motor 6. The resistance sensor inside the drive motor 6 detects the output torque. When the limit component blocks the gear 4, or when personnel stop walking and come into contact with the barrier bar 3 and generate resistance, the drive motor 6 is de-energized to prevent damage or injury to personnel. The drive motor 6 starts intermittently and detects the resistance, so that the barrier bar 3 rotates normally when the resistance disappears.
[0029] During the process of personnel entering and leaving the outer shell 1, multiple checks are required to prevent errors in a single check from affecting the security check process;
[0030] When a knife is detected or a person attempting to escape is identified by the detection camera 5, the electromagnet 9 is energized to generate a magnetic force that attracts the low-carbon steel block 804, causing the gear ring 8 to move toward and mesh with the gear 4, preventing the gear 4 from rotating. This stops the barrier bar 3 from blocking people. The energization of the electromagnet 9 is coordinated with the drive motor 6 to stop the barrier bar 3 at the position shown in the figure. There is a certain gap between the barrier bar 3 at the entrance and the barrier bar 4, which facilitates blocking dangerous or escaped persons at the exit. Ordinary people who have just entered the outer shell 1 can leave the outer shell 1. Dangerous persons at the exit must hand over knives or other objects through the gap between the barrier bars 3 and pass through the detection again before the operator can manually control the release of the barrier.
[0031] Through the above steps, a rotating channel is formed by setting the outer shell 1 and the column 102, and three sets of electromagnetic transmitters 201 and electromagnetic receivers 202 are set in the channel for repeated detection to reduce the detection error rate. At the entrance, the detection camera 5 detects faces. When a dangerous person carrying a dangerous knife is detected or an escapee is detected, the limit component can be used to limit the rotation of the blocking bar 3 while the person is being detected inside the outer shell 1, thus locking the person inside the outer shell 1 and preventing the person from escaping or using a knife to suddenly attack and injure people.
Claims
1. A contraband security gate detection device, comprising a housing (1); characterized in that: It also includes a barrier bar (3) and a drive assembly. The outer shell (1) is roughly a vertically cut hollow cylinder. A column (102) is provided on the inner side of the outer shell (1). An electromagnetic transmitter (201) is provided on the outer side of the column (102). An electromagnetic receiver (202) is provided on the inner side of the outer shell (1). The electromagnetic transmitter (201) and the electromagnetic receiver (202) are arranged in pairs around the axis of the column (102) at a 90-degree angle. A rotating barrier bar (3) is provided on the outer side of the column (102). A drive assembly is provided on the top of the outer shell (1). A limit assembly is provided on the top of the outer shell (1). A detection camera (5) is provided on the top of the outer shell (1). A partition wall (101) is provided on one side of the outer shell (1) to divide the space into an entrance side and an exit side. The position of the detection camera (5) is on the entrance side, and the other side of the partition wall (101) is the exit side.
2. The prohibited items security gate detection device according to claim 1, characterized in that: A connecting column (301) is provided on the outside of the column (102). Three sets of connecting columns (301) are equidistant around the circumference. The connecting column (301) and the column (102) have a gap greater than the thickness of the electromagnetic transmitter (201). Connecting rings (302) are provided at the upper and lower ends of the connecting column (301). The connecting column (301), the connecting ring (302) and the blocking crossbar (3) are fixedly connected. A gear (4) is fixedly connected above the upper connecting ring (302).
3. The prohibited items security gate detection device according to claim 2, characterized in that: The bottom end of the column (102) is provided with a thrust bearing (303) for carrying the connecting ring (302), and the upper end of the column (102) is provided with a roller bearing (304) for maintaining the distance between the connecting column (301) and the column (102).
4. The prohibited items security gate detection device according to claim 2, characterized in that: The drive assembly includes a drive motor (6), a pulley (601) and a transmission belt (602). The drive motor (6) is located on the top of the housing (1). The drive motor (6) has a built-in resistance sensor. The pulley (601) is located on the output end of the drive motor (6) and on the top of the gear (4). The transmission belt (602) is located on the outside of the pulley (601).
5. The contraband security gate detection device according to claim 4, characterized in that: A grating box (701) is provided above the pulley (601). The grating box (701) is hollow and has a light-transmitting groove (702) on its side wall. A light emitter (703) and a light receiver (704) are provided on both sides of the grating box (701). The line connecting the light emitter (703) and the light receiver (704) passes through the center of the grating box (701).
6. The contraband security gate detection device according to claim 1, characterized in that: The limiting assembly includes a toothed ring (8), a tension spring (803) and an electromagnet (9). A toothed ring (8) is provided on one side of the gear (4), and a fixed seat (802) is provided on the side of the toothed ring (8) away from the gear (4). The fixed seat (802) is fixedly connected to the outer shell (1), and a tension spring (803) is provided in the space between the fixed seat (802) and the toothed ring (8).
7. The prohibited items security gate detection device according to claim 6, characterized in that: A guide rod (801) is provided on the side of the toothed ring (8) near the fixed seat (802). The guide rod (801) is slidably connected to the fixed seat (802). A low carbon steel block (804) is provided on one side of the guide rod (801). An electromagnet (9) is provided on the side of the low carbon steel block (804) near the toothed ring (8). The electromagnet (9) is fixedly connected to the outer shell (1).