Wireless freeze sensor and alert system
First Claim
Patent Images
1. A freeze detection device comprising:
- a housing;
a source of electrical power;
a freeze-sensing means that senses and represents the temperature of its surroundings as an electronic signal;
a decision unit that decides if a freeze condition has developed or resolved based on comparisons of data from said freeze-sensing means with predefined set points;
a transmitting means for generating a wireless signal responsive to said decision unit.
0 Assignments
0 Petitions
Accused Products
Abstract
A freeze detection device that sends a wireless freeze-alert signal when a water freeze condition is detected. The device allows ready installation in areas where traditional freeze detection equipment would require significant effort and expense. The device provides freeze-detecting functionality with very small power consumption, allowing long lasting sensing capability and low maintenance
-
Citations
19 Claims
-
1. A freeze detection device comprising:
-
a housing;
a source of electrical power;
a freeze-sensing means that senses and represents the temperature of its surroundings as an electronic signal;
a decision unit that decides if a freeze condition has developed or resolved based on comparisons of data from said freeze-sensing means with predefined set points;
a transmitting means for generating a wireless signal responsive to said decision unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. A method of detecting freeze conditions comprising the steps of:
-
(a) Periodically sampling a freeze-sensing device that senses temperature or temperature-correlated values;
(b) Identifying the direction of the change of the sampled values;
(c) Identifying a “
freeze threat”
condition as a set of decreasing sampled values together with a sampled value that has crossed below a predefined “
freeze threat”
set point;
(d) Identifying a “
freeze safe”
condition as a set of increasing sampled values together with a sampled value that has crossed above a predefined “
freeze safe”
set point. - View Dependent Claims (17, 18, 19)
-
Specification