En av våre forretningsområder er systemløsninger for lagring og transport av flytende energigasser (LNG, LBG, LCNG).

Bulletproof Wireless Reliability with Redundant Links 

Imagine that two generals are each camped with their armies on two hilltops, with enemy forces filling the valley in between. The first general sends her best scout to sneak through the valley and deliver this message to her counterpart: "Our only hope is a coordinated assault—a mistimed attack would be disastrous. If I have been assured that you will join me, I will attack at midnight tonight." The second general responds by sending a messenger with a reply to the same effect.The problem is that even if both messages get through, neither general could have absolute confidence in the attack. Due to the unreliability of their communications, the second general does not know if his reply was received, so he does not know how the first general will act. Meanwhile, even as she holds the reply in her hands the first general knows that the second general will be uncertain about the status of his reply. This uncertainty compromises the confidence that both generals need to attack. The startling truth is that no matter how many messages the two generals send neither can ever be absolutely confident in the attack, because the status of the last message in the exchange will always be in doubt. This dilemma, known as the "two generals' problem," exists any time communications reliability is uncertain, and illustrates the importance of finding strategies to increase the reliability and decrease the unpredictability of a communications system.

Wireless technology has been used for commercial applications for a number of years. WiFi/IEEE802.11 standards and cellular GSM and CDMA systems are now widely used in homes or for enterprise applications.
Wireless solutions have many advantages over wired solutions. For example, wireless eliminates wiring costs and increases mobility. Thanks to the development and maturity of wireless technology, industrial applications can now reap the benefits
 

GPRS is a communication technology that allows data acquisition systems to overcome the difficulty of cabling for wide area remote sites. GPRS applications are becoming more and more prevalent due to the ease with which they can be implemented, but the dynamic IP address issues associated
with GPRS networking continue to frustrate system integrators.

What is GPRS I/O? How can GPRS I/O help?
GPRS I/O devices utilize GPRS communication technology to collect data from monitored devices. GPRS I/O provides maximum flexibility and accessibility for remote monitoring and alarm systems by offering measurement data in places where cables are not convenient or feasible, making GPRS I/O especially suitable for wide area deployment, such as unmanned site monitoring, riverside monitoring, and pipeline monitoring.
 

GTM-201-USB is a new product designed by ICP DAS. It’s an industrial Quad-band GPRS/GSM modems with USB interface that works at frequencies of GSM 850 MHz, EGSM 900 MHz, DCS 1800 MHz and PCS 1900 MHz. The modem utilizes the GPRS/GSM network for convenient and inexpensive data transferring from remote instruments, meters, computers or control systems in either live data or packet data acquisition. The GTM-201-USB has the integrated TCP/IP stack so that even simple controllers with serial communications ports can be connected to the modem. The features of the GTM-201-USB allow a variety of PC applications to take advantage of SMS and GPRS connectivity. The voice interface allows these modems to be also applied to alarm systems with sounds.

GT-530 is an intelligent SMS controller for industry applications with the simple commands and SMS tunnel function, and power can be input by the external power or Li-Battery. It supports UNICODE or 7 bit format for users to implement sending SMS messages with various languages. Applying GT-530, the SMS reports can be sent by defined time or DI/counter event trigger. This can be a remote control and alarm system allowing you to use your mobile phone to monitor and control your business from any location. Its alarm facilities provide a flexible way to distribute critical alarm information to any number of mobile phone users. GT-530 can monitor total 10 digital inputs (6 counters). The users can interrogate the status of I/O through SMS messages. GT-530 also has 2 Digital output which can be activated via DI trigger or SMS to control the lamps, pumps, heaters etc.