Personal monitor and process for heat and work stress
First Claim
1. A personal monitor for work and heat stress which comprises a heart beat sensor producing output electrical signals indicating a user'"'"'s heart beats, means for storing heart beat information corresponding to the heart beat signals produced over predetermined time intervals, information processing means connected to receive the heart beat information from said storing means, said information processing means being configured to analyze the heart beat information incrementally over the predetermined time intervals through moving time averages with a plurality of different time bases to obtain a physiological demand during the predetermined time intervals and to compare the obtained physiological demand against a stored physiological demand limit, and means for providing an indication to the user when the stored physiological demand limit has been exceeded, said information processing means being configured and connected to control operation of said indication providing means.
0 Assignments
0 Petitions
Accused Products
Abstract
A personal monitor (10, 100, 200) for work and heat stress has a heart beat sensor (12) producing output electrical signals indicating a user'"'"'s heart beats. A memory (127) stores heart beat information corresponding to the heart beat signals produced over predetermined time intervals. A microprocess (126) is connected to receive the heart beat information from the memory (127). The microprocessor (126) analyzes the heart beat information incrementally over the predetermined time intervals under program control to obtain a physiological demand during the predetermined time intervals and compares the obtained physiological demand against a stored physiological demand limit. Light emitting diodes (208) and a sound producing diaphragm (186) provide indications to the user when the stored physiological demand limit has been exceeded. The microprocessor (126) controls operation of the LEDs (208) and the diaphragm (186).
147 Citations
19 Claims
- 1. A personal monitor for work and heat stress which comprises a heart beat sensor producing output electrical signals indicating a user'"'"'s heart beats, means for storing heart beat information corresponding to the heart beat signals produced over predetermined time intervals, information processing means connected to receive the heart beat information from said storing means, said information processing means being configured to analyze the heart beat information incrementally over the predetermined time intervals through moving time averages with a plurality of different time bases to obtain a physiological demand during the predetermined time intervals and to compare the obtained physiological demand against a stored physiological demand limit, and means for providing an indication to the user when the stored physiological demand limit has been exceeded, said information processing means being configured and connected to control operation of said indication providing means.
- 11. A temperature sensor comprising a thermally and electrically conducting member having a bare, outwardly facing, unbroken surface configured and positioned to make direct contact with the skin of a person whose temperature is to be measured, a temperature sensitive solid state device thermally and electrically directly connected to an opposite surface of said thermally and electrically conducting member for producing an output electrical signal which is a function of temperature and a sufficient body of thermally insulating material surrounding a remainder of said thermally and electrically conducting member to provide the output electrical signal indicating insulated skin temperature as an approximation of the person'"'"'s body core temperature, said thermally and electrically conducting member comprising both a thermal contact for the person'"'"'s skin and a reference electrode of said temperature sensor.
- 14. A process for monitoring heat and work stress of an individual, which comprises measuring the individual'"'"'s heart beats over predetermined time intervals, analyzing the heart beat information incrementally over the predetermined time intervals through moving time averages with a plurality of different time bases to obtain a physiological demand during the predetermined time intervals, comparing the obtained physiological demand against a predetermined physiological demand limit, and providing an indication to the individual when the predetermined physiological demand limit has been exceeded.
Specification