Motion and sound monitor and stimulator

• US 5,684,460 A
• Filed: 05/09/1996
• Issued: 11/04/1997
• Est. Priority Date: 04/22/1994
• Status: Expired due to Term

• Current Assignee: The United States of America As Represented By The Secretary of Agriculture
• Original Assignee: The United States Of America As Represented By The Secretary Of The Army
• Inventors: Scanlon, Michael V.
• Primary Examiner(s): SWANN III, GLEN R
• Application Number:
  US08/638,721
• Time in Patent Office: 544 Days
• Field of Search: 340/573, 128/721
• US Class Current: 340/573.1
• CPC Class Codes: A61B 2562/0219 Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches
• CPC Class Codes: A61B 2562/168 Fluid filled sensor housings
• CPC Class Codes: A61B 5/113 occurring during breathing
• CPC Class Codes: A61B 5/6892 Mats

Abstract

A movement monitor and stimulator may prevent death in human infants from sudden infant death syndrome (SIDS). Recent medical studies indicate a SIDS victim'"'"'s breathing may be resuscitated by immediate stimulation. The sound and/or movement monitor and stimulator may have a base member configured as a fluid-filled sensing pad for supporting an infant and a transducer for detecting movement or acoustic activity (e.g., heart beat, breathing, voice and motion sounds). A stimulator may move the base member to stimulate movement in the object when output from the transducer corresponds to no sound and/or movement from the object, or indicates a dangerous change in monitored condition, such as the decrease in metabolic rate indicative of the onset of sleep. The stimulator may also be applied in a more gentle fashion to soothe and quiet an infant that has been awakened unexpectedly. The transducer may be a pressure transducer in fluid communication with the fluid interior of the sensing pad. Alternatively, a piezoelectric sheet operatively connected to a surface of the sensing pad may detect movement and movement cessation. An alarm may provide an audible and/or visual indication to third parties when there is no movement from the object. A transmitter may continuously transmit the sensor'"'"'s output to a remote location for monitoring. A remote monitor may transmit heart and breathing sounds and may also have lights indicating motion and acoustic activity to indicate the infant is breathing.

Claims

1. A sound and movement monitor and stimulator, comprising:

(a) a fluid-filled mattress for supporting an animate object;

(b) a sound and movement transducer positioned for detecting movement activity and acoustic activity of the object on said mattress, said transducer providing an output signal in response to forces applied thereto which are generated by and representative of said activity, said transducer including a pressure transducing element arranged in fluid communication with the internal fluid volume of said mattress such that forces applied to said mattress by said object cause pressure changes which are detected by said pressure transducing element, said pressure transducing element providing an output proportional to the pressure changes;

(c) a circuit connected to said transducer and adapted to monitor said output signal from said transducer; and

(d) a stimulator connected to said circuit and being operable to provide at least physical movement to the object to stimulate movement or acoustic activity in the object when the output from said transducer to said circuit corresponds to no movement activity and no acoustic activity from the object;

wherein said mattress is configured so said activity from the object including at least one of breathing, heart and motion sounds of the object is transmitted to said transducer said mattress including top and bottom surfaces which are sufficiently rigid so as to facilitate transmission of pressure fluctuations from the object to said transducer.

2. The sound and movement monitor and stimulator of claim 1, wherein said stimulator generates vibratory movement of said mattress.

3. The sound and movement monitor and stimulator of claim 1, further comprising an alarm actuated by said circuit when said output from said transducer corresponds to at least one of no movement from the object and absence of predetermined acoustic signals.

4. The sound and movement monitor and stimulator of claim 1, wherein said stimulator includes means for shaking said mattress to stimulate movement of the animate object.

5. The sound and movement monitor and stimulator of claim 1, wherein said output signal from the transducer is transmitted to a remote location for monitoring.

6. The sound and movement monitor and stimulator of claim 1, wherein said stimulator generates at least one of sound, light, electrical, chemical, or mechanical stimulation to at least one of said mattress and the animate object.

7. The sound and movement monitor and stimulator of claim 1, wherein said mattress is a liquid-filled mattress, and said transducer includes a sound transducing element configured so sounds from the animate object are detected and converted to electrical signals for transmission to said circuit.

8. An acoustic monitoring system comprising:

a liquid-filled sensor pad adapted to support an animate object;

acoustic transducing means for monitoring and converting acoustic activity of the animate object on said sensor pad to electrical signals corresponding to the monitored acoustic activity;

a circuit connected to said acoustic transducing means and adapted to receive the electrical signals from said acoustic transducing means;

a transmitter located at a first position and connected to said circuit, said transmitter configured to transmit signals corresponding to the acoustic activity of the animate object;

a receiver located at a second position spaced apart from said first position and configured to receive signals from said transmitter; and

a physical stimulator connected to said circuit and adapted to physically move said sensor pad and the animate object, when the electrical signals from said acoustic transducing means correspond to no acoustic activity of the animate object.

9. The acoustic monitoring system of claim 8, further comprising an alarm connected to said circuit, said alarm including a sound emitting element.

10. The acoustic monitoring system of claim 9, wherein said alarm further includes a light emitting element.

11. A method of monitoring and stimulating an animate object comprising the steps of:

determining acoustic activity of an animate object;

transmitting a first signal corresponding to the acoustic activity to a control element;

stimulating the animate object when the first signal received by the control element corresponds to no acoustic activity from the animate object.

12. The method according to claim 11, further comprising the steps of:

determining movement activity of an animate object;

transmitting a second signal corresponding to the movement activity to the control element;

stimulating the animate object when the second signal received by the control element corresponds to no movement activity from the animate object.

13. The method according to claim 12, further comprising the step of actuating an alarm when the signals received by the control element corresponds to at least one of no movement activity and no acoustic activity from the animate object.

14. The method according to claim 13, further comprising the step of transmitting the signals received by the control element to a location remote from the control element for monitoring by a user.