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Preface
In order to strengthen the security work of the troops, prevent firearms and ammunition on duty being robbed, sentries being attacked, and sentries fleeing the troops with guns and ammunition, intensify the supervision and management of on-duty (mobile) ammunition, effectively prevent the loss of bullets, and eliminate gun involvement. Major and malignant cases of ammunition occurred. Based on the actual situation of the army, we have developed the “firearms anti-lost, anti-looting, anti-theft wireless alarm system”, and “gun and ammunition combination, gun and ammunition wireless alarm system.” It has been installed and used on the mobile sentry and fixed sentry guns in the field. By connecting the “alarm control command center” (duty room), it has achieved timely, accurate, multi-directional and multi-functional alarm effects. The system has simple operation, The advantages of easy use, reasonable configuration, strong pertinence, stable operation, etc., have achieved various design functions. And it has passed the appraisal of the appraisal committee of a certain military region expert group, and is approved to equip troops.
1. System overview
The firearm out-of-position warning system is a security system developed by Ren Microelectronics based on years of experience in security protection construction, combined with today’s advanced wireless sensor network technology, frequency hopping communication technology and energy-saving technology. Compared with the traditional out-of-position warning system, the system has the characteristics of energy saving and environmental protection, high reliability, simple installation and debugging, and low daily maintenance.
Miniature signal transmitters are installed in the butt of automatic rifles such as Type 81, Type 81-1, Type 95, Type 03, etc., which are installed on the butt. System monitoring and control are defined according to the actual situation of the sentry post. The range is the warning line. The signal collected by the receiver is analyzed by the single-chip microcomputer. When the sentinel is out of position 4-5 meters, the receiver loses the signal, and the voice prompts the gun to be out of position. If it comes back within the specified time, the system returns to normal. ; Otherwise, the alarm system will treat it as a warning that the gun has been stolen, and the alarm will sound an alarm after comparison is confirmed. (If you encounter an emergency, you can also call the alarm button.) After the alarm host in the duty room receives the alarm signal, it will display the sentry number with sound and light, and send out voice messages and alarm sounds. The personnel on duty can arrange emergency teams for disposal. In order to understand the entire process of the sentinel’s duty situation and provide reference materials after the occurrence of an emergency, the alarm host sets up a storage unit to make a comprehensive record of the firearm’s out-of-position situation.
Aimed at the problems of individual sentry firearms due to misloading of live ammunition, the intelligent on-duty bullet combination and bullet separation reminder system was developed. As long as the sentry gun and the magazine are separated or the gun and the magazine are combined, the system will immediately issue an alarm, which greatly improves the troops’ ability to respond quickly to emergencies at the sentry and improves the security management level of the sentry.
2. System composition
System composition diagram
The system is mainly composed of gun tag RW-T737, omnidirectional reader RW-R801, low frequency activator RW-R750, remote wireless voice alarm host system, emergency alarm button, behavior recognition analysis software, electronic map display, printing and other parts.
2.1: RFID electronic tags
As the most advanced identification code at present, the electronic tag is not easy to be damaged, has reliable data, and is used as the only identification of the target for tracking and positioning. At work, managers use networked wireless identification base stations to track and locate the characteristics of long period, effective communication distance, etc., which is the best choice to replace bar codes and infrared identification. Install it on the controlled target.
Electronic tag (RFID) technology is a wireless radio frequency automatic identification technology that uses radio frequency signals and their spatial coupling and transmission characteristics to realize automatic machine identification of stationary or moving items to be identified. The system is developed through electronic label technology , Produced two products, electronic wristband and prison guard card.
The radio frequency identification system generally consists of three parts, namely, electronic tags, readers, and background management software. In the application, the electronic tag is attached to the object, equipment, or person to be identified. When the object, equipment, or person attached to the electronic tag enters the reading range of the reader, the reader will automatically wirelessly send the agreement in the electronic tag The identification information receives or writes specific information, so as to realize the function of automatically identifying items or automatically collecting item identification information.
The system composed of RFID and short-range communication equipment mainly includes two parts: smart RFID and RFID read-write units (RWU). The wireless communication between the read-write equipment RWU and RFID realizes the communication between the information management system and RFID. Information exchange.
2.2: Principles of RFID identification technology
The read-write device RWU is an RFID read-write controller, which is composed of a microprocessor, a security module, a microwave communication controller and communication interfaces such as RS232, 485, TCP/IP, etc. It uses short-range communication protocols and microwave wireless transmission methods to realize RWU For the purpose of safe and reliable information exchange with RFID, RWU connects to the host computer through RS232, 485, WIFI, GPRS, TCP/IP, etc., receives control commands and data from the host computer and returns data.
2.3: Principle of low frequency activator
Our company’s low-frequency activator, each low-frequency activator has 4 or 6-way activating antennas, and 4 or 6 adjacent rooms can share a low-frequency activator. In our positioning system, the positioning base station is The smallest base point, as the nearest base point of the positioning point, the distance of the activation tag is 3-3.5 meters, that is, each tag is activated within the range of 3-3.5 meters from the activator, and its positioning accuracy can be described as 3- 3.5 meters. The activators in different areas have their own unique address codes. When a person enters the positioning base station with a semi-active low-frequency activation tag and is activated, the tag works normally and sends the ID number of the tag to the outside world and also sends out the activation tag. The address code of the activator, in this way, through the address code of the activator, we can locate the location of the label. When the tag is taken from one activator to another location, the uploaded activator address code will also change accordingly, thus forming a complete positioning system. The data uploaded by the tag is received by a large-scale positioning base station gateway, and the information is uploaded to the management center for processing, completing the entire positioning system. For the sentry off-position system, only the low-frequency activator needs to be reasonably arranged or by means of a coil around the city to effectively control the sentry off-site by about 5 meters.
Pure 2.45G active RFID should have a long transmission distance, and it is not easy to be a sentry off-site system for reasons such as signal interference. It needs to cooperate with a low-frequency activator to reduce the range. On the one hand, it can accurately locate the sentry off-location distance and ensure the signal stability. Less interference.
3. System features
3.1 Real-time automatic alarm function for robbery guns: The device has advanced detection functions, and under the 24-hour real-time monitoring and control, it automatically alarms and informs the staff on duty when the gun is robbed or the gun is out of position.
3.2 Automatic alarm function for unauthorized departure from the sentry: The system can automatically warn or notify the staff on duty in response to the actual situation of the sentry on duty and for the sentry to leave the post without authorization.
3.3 Anti-demolition and anti-demolition: It has the function of anti-demolition and anti-demolition alarm. The electronic tag in the gun has an anti-removal function. When the electronic tag set in the butt accessory box is illegally removed, it can automatically alarm. The equipment is small in size, good in concealment, and not easy to be destroyed by people.
3.4 Multiple alarm functions: firearms in position display, out of position warning or alarm, power failure reminder, emergency alarm, multi-level alarm, disconnection alarm.
3.5 With event real-time recording function: the system can detect on-duty sentry in real time, and record the occurrence of events in real time, which is convenient for related personnel to review afterwards.
3.6 Arming and disarming: the time of arming and disarming can be set according to the time period of changing defense.
3.7 Strong anti-interference ability: adopts wireless frequency triple frequency hopping technology, adaptive space radio wave.
3.8 Full wireless mode, low power consumption: energy saving, low power consumption. The testing equipment in the field is low-power equipment;
3.9 The design idea is novel. The project comprehensively analyzed the key and difficult issues of the army’s duty work, and did systematic research on alarm review and alarm linkage, and creatively proposed the design idea of combining civil air defense and technical defense, and combining external defense and internal defense. It has fundamentally solved the problem of uncontrollable guns on duty that has long plagued the army. At the same time, it has a wide range of application value in military equipment supervision, personnel monitoring and other related work, filling the gap in this field.
3.10 Wide adaptability: The system function adopts a modular structure, which can flexibly combine the functions of gun out of position, sentinel out of position, emergency alarm and other functions according to actual needs, and has a wide range of adaptability.
3.11 Tracking and positioning: In case of special circumstances, the tracker can monitor the sound around the gun through the mobile phone or learn the geographic location of the off-site gun through the mobile phone text message. At the same time, the real-time geographic location of the gun can be found through the “location online” electronic map of the mobile phone or computer online platform.
3.12 The separation and combination of bullets: As long as the sentry gun and the magazine are separated or the gun and the magazine are combined, the system will immediately issue an alarm, which greatly improves the rapid response ability of the troops to deal with the emergency situation of the sentry, and improves the safety management level of the sentry. .
Four, technical route
The system consists of electronic tags, omnidirectional readers, low-frequency activators, emergency alarm buttons, alarm host and behavior analysis software.
95/03 gun handle
Insert the electronic tag into the attachment part of the 81 rifle of the gun, and the hollow inside the handle of the 95 rifle.
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