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Personal Trackers
| Applications | |
|---|---|
| Title | Personal Trackers |
| Author(s) | Rui Barradas Pereira. |
| Level | Basic |
| Year of Publication | 2011 |
The GNSS personal tracking is a product feature that allows persons to be tracked by a system that can make available the person's position to other systems or persons. This concept can be aplied also to the tracking of objects or animals. The system works by having a device attached on the tracked person or object which transmits the position information to a server usually using the cellular network either by the use SMS or an internet connection .
The person trackers is an emerging trend, partially spread by the popular smartphones with built-in GNSS that can be used to locate a person with a relative lower cost.
Some of the most common motivation for individual tracking products include the monitoring children whereabouts, newborn infants in hospital nurseries and elderly relatives. There are other tracking systems applications meant for crime control issues, pets tracking and wildlife tracking.
The electronic ankle bracelets are an example of personal tracking products, meant to control prison populations, house arrests or protecting victims of crimes.
Product Description
The GNSS personal tracking devices transmit the location data to a server using the GSM network allowing to have a near world wide tracking coverage. Each GNSS personal device emits its own unique signal which can be identified by a system of codes [1] and coordinates. These coordinates are used to determine the devices precise location and present the location on a map.
There are a number of reasons for GNSS tracking such as the location of individuals who get lost in outdoor activities, safety of children, elderly relatives or Parkinson patients.
Some devices give the possibility to monitor, not only the position data, but they can also include time, velocity, or even monitor heart rate, temperature, and blood pressure, for people with health problems and special needs. Another feature available is the definition of a geofence, i.e., areas where the presence of the person is allowed, without generating an alert. In case the person trespasses outside the established zone, the device automatically begins the tracking and send an alert to a list of designated recipients usually via cell phone.[2]
Some of these tracking equipments also own a "panic" button, allowing the tracked person to issue an alarm when in a dangerous situation such as being hurt, ill, lost or scared. When the alarm button is pushed in the device an alert is sent to a list of designated recipients.[2] This information can also be transmitted to an emergency hotline.
Tracking systems, have an enormous potential for fields other than children or eldery tracking, such as law enforcement, theft prevention, pets tracking or wildlife tracking, among others.
In terms of crime control issues, personal tracker products have potential use in the following situations:
- Law enforcement: this is the concept of keep tracking of a suspect, usually by attaching a GNSS device in a vehicle, in order to verify the suspect activities in a control room, preventing the police members to expose to much and saving investigation resources.
- Theft prevention: this is the concept of keep tracking of companies assets using the geofence mechanism. These systems raise an alert to the company's security or to the police once the tracked asset trespasses the control zone.
In terms of GNSS tracking in animals, there are the following common usages:
- Pets tracking: these are bracelets or collar systems targeted to owners of dogs and cats.
- The technology to use GNSS to track pets is relatively new. Most of current systems require an utilization solely in areas covered by the GSM cellular network.[3]
- Wildlife tracking: meant for wildlife study and prevention, these tracking bracelets or collar systems are usually used in mammals and large birds.
- The GNSS wildlife tracking is another high-potential growth area for GNSS applications. With ever smaller dimensions and weights and the availability of solar cell power these devices can be used in a growing number of cases.[4] Simpler units store data in internal memory, which can be later retrieved.
- Other systems for wildlife tracking units are able to send the data through a cell phone network in regular time intervals or on demand in the case of units with two way communication modes.
- The most sophisticated GNSS wildlife tracking systems send the data in regular intervals via satellites, allowing a global coverage, almost in real time.
The applications for which personal trackers are used are considered as non-critical applications although in some cases can be used to ensure the safety of persons or goods.
The accuracy required by these applications is low. The current accuracy provided by civilian GPS is enough for these applications. Availability, however, can be reduced in urban environments or in areas with heavy foliage and deep canyons.
Product Characterization
The cost of these products has dropped considerably in recent years, offering the possibility of mass consumption by the average citizen. Aligned with this, the devices had demonstrated to be very useful in children monitoring. The tracking systems provide a GNSS device to be placed with the tracked person.
Usually, the tracking device is acquired as a service and is monitored by the location provider via cellular network, either using SMS or an internet connection, allowing the service to know always the person's precise location. This location is provided to the autorized persons through cell phone or through the provider's website[2].
Besides the cost of the device, usually there is a monthly subscription fee, similar to the way cellular phone service operates. [2]
The Electronic Bracelets products are a specific tracking system used for the monitoring of prisioners, persons under house arrest or that have restrictions to their movement due to legal issues.
Detailed information about Electronic Bracelets can be found here.
Product Examples
The children tracking devices appear in several shapes and sizes, such as a wristwatch, a necklace, a cell phone and GNSS devices placed in book bags, shoes and clothing.
Usually the personal locaters are small standalone devices, but GNSS cell phones can be also used. Some cell phone operators provide the type of service either based on GNSS or in celular network positioning.
Most personal trackers are sold in a package that include the tracking services and that usually require a subscription to a service. Normally these providers have a local nature having each country specific providers
Manufactures like Garmin or Bushnell have their own personal locator devices:[5]
Other companies with devices that fit in this category are the following:[6]
Companies like Locationnow provide services which integrate the tracking devices with GSM/GPRS based applications.
GNSS Wildlife tracking systems:
- Televilt This company manufacture three different types of collars as well as backpacks for birds.
- Telemetry Solutions A telemetry company involved in GNSS wildlife tracking since 1998.
- BlueSky Telemetry
- Telonics
Notes
References
- ^ Findfree People Friends Site
- ^ a b c d Maps GPS Info Site - GPS child tracker
- ^ GPS practice and fun site - Pet tracking
- ^ GPS practice and fun site - Wildlife tracking
- ^ GPS Locators
- ^ Personal locators Comparison