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Monitoring system for preventing loss of contact between e.g. adult and child, comprises two portable units which generate alarm when given distance between them is exceeded
Monitoring system for preventing loss of contact between e.g. adult and child, comprises two portable units which generate alarm when given distance between them is exceeded
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机译:监视系统,以防止例如成人和儿童,包括两个便携式单元,当它们之间的给定距离超过时会生成警报
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摘要
The system comprises two portable alarm units, each one being capable of generating at least one alarm signal when a pre-determined distance between the two units is exceeded. The units can be worn on the person or by an animal, preferably in jewellery or watches, and communicate with each other via radar, infra-red, ultrasound or radio-wave signals.
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