INTRODUCTION

The judicial prison systems of all countries in the world are facing severe prison population pressure and the accompanying financial pressure. Therefore, governments of all countries are trying to reduce the number of detainees in prisons. With the development of positioning technology and mobile communication technology, electronic anklets are widely used in the judicial systems of various countries to monitor and reform some people who have committed minor crimes and do not need to be detained directly or other parolees, so as to alleviate the population and financial pressure of the prison system.

CHALLENGE

Location monitoring and anti-removal electronic anklets are the most basic and important functions. Judicial supervision units need to keep track of the location information of parolees at all times and ensure that the electronic anklets will not be removed.

Different positioning technology requirements are required for different supervision scenarios. In addition to the need to obtain the most basic real-time positioning information, the wearer’s range of activities may also be restricted. The restricted range may be a city, a town, a community, a house, or even a specific room. This requires electronic monitoring equipment to have positioning technology that can meet different scenarios, including indoor and outdoor scenes, so that the supervisor can grasp the location information of the parolee anytime and anywhere. When the parolee enters or leaves the designated area, the equipment can promptly notify the supervisor to warn the parolee to stop illegal behavior.

Device battery life is another point of concern for electronic anklets. Low power consumption and large-capacity batteries are two common means to ensure the battery life of the device. Traditional electronic monitoring equipment manufacturers usually equip the equipment with large-capacity batteries to ensure the battery life of the equipment, but this will make the device large and inconvenient to wear. Therefore, a high-efficiency device battery life solution is what all electronic anklets hope to have.

SOLUTION

The positioning and tracking system is the basis of the electronic anklet. In order to meet the positioning technology requirements of different scenarios, the G737 electronic anklet supports multiple positioning methods, including global satellite positioning system, LBS, wifi and BLE-based Beacon. Outdoors, use the global navigation satellite positioning system, including GPS, BDS, GLONASS, GALILLEO. When the satellite signal is not good, the LBS positioning method can also be used instead. Indoors, such as large shopping malls, terminals, prisons, family homes, and rooms, wifi or beacon-assisted positioning methods can be used. When the wearer enters or leaves the wifi or Beacon range that has been recorded in the ID whitelist, the device will identify it and report the relevant information to the background server. The supervisor can then know the wearer’s location information and even implement house arrest.

Based on the positioning tracking system, in addition to obtaining basic location information, it also supports movement tracks and electronic fences . In conjunction with the server platform, the movement track of the parolee can be displayed on the map. The activity range of the parolee can also be set. When entering or leaving these set ranges, an alarm will be triggered and the information will be reported to the server. The supervisor can quickly grasp these illegal behaviors and take corresponding measures in time.

In terms of appearance and structure, it meets the IP67 waterproof and dustproof design requirements, and can prevent water spray from any direction and will not be affected by immersion in 1M water, which means that parolees can wear the device to take a shower. The shackles have built-in fiber optic detection . If the parolee tries to damage the device and disconnect the fiber optic, it will trigger an alarm to notify the supervisor, achieving the effect of deterring the parolee and preventing illegal disassembly.

In order to ensure the long battery life of the device and reduce the size of the device, a lithium polymer battery with small size and large capacity is built in, and the battery capacity is 2200mAh. When the device functions are fully turned on, a piece of data is reported every 20 minutes, and it can run continuously for 72 hours. Of course, most judicial regulators may not need to use all functions, which may run longer. In addition, in order to facilitate the wearer to charge the device at any time and ensure that the device will not lose contact due to insufficient power, G737 supports two charging methods. In addition to charging with a charger, G737 is also equipped with a power bank . The mobile power bank is designed to provide convenience for users so that they don’t have to sit for a long time to charge the battery with a wall charger. They can just clip the power bank on the tracker and move around. The mobile power bank with GPS tracker can fully charge the G737 ankle tracker bracelet in 2 and a half hours.

There are other important factors that affect the battery life of the device, such as the communication technology and hardware performance parameters used. The overall design of G737 is designed according to the principle of low power consumption. For example, in terms of communication, the LTE CAT-1 low-power communication module that supports global frequency bands is adopted, and the positioning module and Bluetooth wifi module are also low-power. In terms of program, as long as the Beacon positioning mode is entered, the device will automatically put the satellite positioning module into sleep mode to achieve power saving. When the wearer leaves the range of the Boacon device, the satellite positioning module will automatically activate the work. Whether it is hardware performance or software program, G737 follows the principle of low power consumption. It provides both convenient charging methods and power-saving operation modes.

G737 also has a series of functions to ensure that the device and parolees are under safe monitoring . For example, it has an SOS rescue function. When danger occurs, just long press the SOS button of the watch to send a distress alarm message to the platform server. At the same time, the watch will automatically send text messages to the numbers in the pre-set SOS whitelist. Low battery alarm is an important guarantee to prevent parolees from escaping. When the device is low on power, the power value is lower than the set value of the supervisor, and an alarm message will be generated to report to the platform server. The supervisor can issue a warning to the parolee in time to ensure that the device is online. Finally, a reliable anti-disassembly alarm mechanism is the most important measure to prevent parolees from escaping. When the device is forcibly dismantled, an alarm is triggered to notify the supervisor so that the supervisor can take timely measures. The above functions are all to ensure that the watch and parolees are under safe monitoring.

G737 is committed to providing a safe and reliable electronic monitoring device for the judicial system, which greatly alleviates the population pressure and financial pressure on the judicial prison system.

TOPOLOGY

ADVANTAGE

Advanced positioning and tracking system – four direct or indirect positioning methods including global navigation satellite system, LBS, wifi and ibeacon, which can meet various indoor and outdoor positioning scenarios and support electronic fence function, so that the monitoring party can grasp the location information of the parolee anytime and anywhere.

Intelligent security monitoring – provides multiple ways of monitoring equipment, including SOS, electronic fence, low battery alarm, removal alarm, etc., to assist supervisors in timely understanding the situation of parolees.

Advanced battery life mechanism – both the hardware and software are designed for low power consumption. At a frequency of one piece of data every 20 minutes, it can run stably and continuously for 72 hours, allowing parolees to avoid the trouble of frequent charging and ensure that the equipment is online at any time.

Convenient charging method – equipped with a portable mobile power supply, providing a convenient and fast charging method.

FUNCTION OVERVIEW

Outdoor positioning – supports global navigation satellite positioning GPS, BDS, GLONASS, GALILLEO, and assisted positioning system AGPS, to obtain location information accurately and quickly

Indoor positioning – Indoor positioning technology based on Bluetooth and WiFi technology to obtain indoor location information

Motion trajectory – draw the motion trajectory based on positioning information

Electronic fences – based on the application of global satellite positioning system, Bluetooth, and wifi technology, restricting people from entering or leaving a designated area

Fiber optic detection – detect whether the equipment has been maliciously damaged to prevent disassembly

Low power communication – 4G CAT-1 in global frequency band, low power communication technology

Power Bank – a convenient and fast way to charge

SOS emergency contact

Anti-tampering mechanism – sensor monitoring strap connection, low heart rate alarm, low body temperature alarm

Low battery reminder – notify the supervisor when the battery is low

Maximum battery life up to 72 hours

Waterproof grade IP67