Body motion sensor, program, and information presentation system

1 . A body motion sensor, comprising:

at least one sensor which is placed in a casing, the casing being attachable and configured to be in contact with a body of a wearing person, the at least one sensor being capable of detecting a body situation of the wearing person; and

a processor capable of controlling a transmission of information to an external device based on at least one detection signal from the at least one sensor,

wherein the at least one sensor comprises at least an optical sensor,

wherein the processor detects an abnormality in the wearing person in accordance with a first detection signal from the at least one sensor,

wherein the processor determines a contact state of the casing with the body of the wearing person in accordance with a second detection signal from the optical sensor, and decides an information content to be transmitted to the external device based on the at least one detection signal from the at least one sensor in accordance with a determination result of the contact state,

wherein the processor transmits an alert indicating the abnormality, as the information content to be transmitted to the external device, in response to the abnormality being detected in accordance with the first detection signal and the determination result indicating that the contact state is in contact with the body of the wearing person, and

wherein the processor only determines the contact state of the casing with the body of the wearing person in accordance with the second detection signal after the abnormality in the wearing person is detected in accordance with the first detection signal.

2 . The body motion sensor according to claim 1 , wherein the processor:

determines the contact state of the casing with the body of the wearing person when detecting the abnormality in the wearing person based on the body situation of the wearing person detected by the at least one sensor;

when determining that the casing is in contact with the body of the wearing person, transmits, to the external device, the alert information indicating the abnormality in the wearing person; and

when determining that the casing is not in contact with the body of the wearing person, transmits, to the external device, non-contact information.

3 . A non-transitory computer-readable storage medium storing a program that causes an arithmetic processing device to execute:

obtaining at least one detection signal from at least one sensor which is placed in a casing, the casing being attachable and configured to be in contact with a body of a wearing person, the at least one sensor being capable of detecting a body situation of the wearing person;

detecting an abnormality in the wearing person in accordance with a first detection signal from the at least one sensor;

determining a contact state of the casing with the body of the wearing person in accordance with a second detection signal from an optical sensor that is one of the at least one sensor; and

deciding an information content to be output based on the at least one detection signal from the at least one sensor in accordance with a determination result of the contact state,

wherein the arithmetic processing device transmits an alert indicating the abnormality, as the information content to be output, in response to the abnormality being detected in accordance with the first detection signal and the determination result indicating that the contact state is in contact with the body of the wearing person, and

wherein the arithmetic processing device only determines the contact state of the casing with the body of the wearing person in accordance with the second detection signal after the abnormality in the wearing person is detected in accordance with the first detection signal.

4 . An information presentation system, comprising:

a body motion sensor comprising:

at least one sensor which is placed in a casing, the casing being attachable and configured to be in contact with a body of a wearing person, the at least one sensor being capable of detecting a body situation of the wearing person;

a processor capable of controlling a transmission of information to an external device based on at least one detection signal from the at least one sensor; and

an optical sensor as at least one of the at least one sensor; and

a terminal device presenting information based on the information transmitted from the body motion sensor,

wherein the processor detects an abnormality in the wearing person in accordance with a first detection signal from the at least one sensor,

wherein a contact state of the casing with the body of the wearing person is determined in accordance with a second detection signal from the optical sensor,

wherein a presentation content by the terminal device is decided in accordance with a determination result of the contact state,

wherein the processor transmits an alert indicating the abnormality, as the presentation content to be presented by the terminal device, in response to the abnormality being detected in accordance with the first detection signal and the determination result indicating that the contact state is in contact with the body of the wearing person, and

wherein the processor only determines the contact state of the casing with the body of the wearing person in accordance with the second detection signal after the abnormality in the wearing person is detected in accordance with the first detection signal.