JPH03286741A - Expiration/inspiration sensor for human being and animal - Google Patents

Abstract

PURPOSE:To detect the state of expiration and inspiration in a natural state by converting a physical variation of a temperature difference and a humidity difference of expiration and inspiration at the time when a human being and an animal breathe into an electric signal and outputting it by using an element in which potential is varied due to a variation of a temperature and humidity in an entrance of a nostril. CONSTITUTION:In a sensor 1 installed in a nostril of a human being and an animal, in an expiration state, a temperature of the sensor 1 rises by expiration containing much moisture being near the body temperature and the surface of the sensor 1 is dewed and gets wet. Subsequently, even if breathing is stopped, as for the sensor 1, the temperature does not fall due to the influence of the body temperature. Next, at the time of becoming an inspiration state, the open air which is lower than the body temperature or whose humidity is lower than that of expiration passes through the sensor 1 and heat of vaporization is deprived, the temperature of the sensor 1 falls suddenly and the output potential is varied suddenly. By the variation of this output potential, output signals from an integrator A of an amplifier and a differential amplifier B are amplified and outputted by an amplifier C. Subsequently, when inspiration is executed as it is, the output signal is generated only for a time constant time of an integrator B.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is a device for detecting the state of expiration and intake air by attaching a temperature sensor and humidity sensor to the nostrils of humans and animals [Prior art] In order to detect the state, a movable piece is moved and sealed by the flow or pressure change of exhaled air or jet air, and the operating state is detected by contact or non-contact. ] The above method is an indirect conversion method that converts airflow changes and pressure changes into the movement of a movable piece, and converts the changes into electrical signals using a contact or non-contact point.Moving parts are also required, the structure is complex, and the reliability of the detection signal is low. There are limitations in terms of size, miniaturization, and attachment of the device [Means to solve the problem] This invention detects physical changes in the temperature and humidity differences between exhaled and inhaled air when humans and animals breathe. This method uses an element whose potential changes with changes in temperature and humidity at the inlet of the sensor to convert and output the state of exhaled and inhaled air into electrical signals. [Structure] Sensor 1 is fixed to clip 2 for the purpose of attaching it to the nostril. [How to use] The sensor 1 is attached by clipping it to the wings of the nose or the middle part of the nose with the clip 2 so as not to touch the body.[Example] 1 Now attach the sensor 1 to the sensor 1. When using a temperature sensor element whose potential changes with changes in temperature, when sensor 1 is attached to the nostril of a human or animal, the temperature of sensor 1 increases due to the exhaled breath, which is close to body temperature and contains a lot of moisture, and the surface of sensor 1. becomes wet due to condensation.Next, even if you hold your breath, the temperature of the sensor 1 does not drop due to the influence of your body temperature.Next, when you take an inhalation state, outside air that is lower than your body temperature or lower humidity than your exhaled air passes through the sensor 1, and the heat of vaporization is taken away from the sensor 1.
The sensor temperature suddenly drops and the output potential changes suddenly. This change in output potential is amplified by amplifier C, which outputs the output signals from integrator A and differential amplifier B of the amplifier in the circuit shown in Figure 2.
Next, if you inhale as it is, an output signal will be generated for the time constant of integrator B.2 An inhalation output sensor that uses a humidity sensor for sensor 1.An exhalation or inhalation sensor3.Replace sensor 1 with clip 2. 4. Replace sensor 1 with clip 2 and fix it on the nasal wing or middle part of the nose with adhesive. 5. Turn on the lamp with the output signal of the invention. 6. Turn on the machine with the output signal of the invention (:3) Converts the output signal of the 7 inventions that turn OFF into radio signals 8 Connects a counter to the output of the invention to become a respiration rate measuring device [Effects] The actual sensor can convert exhalation and inspiration directly into electrical signals.
It has no moving parts, has a semi-permanent lifespan, can be easily miniaturized, and can be attached to humans and animals to detect natural breathing and breathing conditions.

[Brief explanation of drawings]

Figure 1 is a perspective view of the present invention. Figure 2 is an example of the electrical circuit of the present invention. 1 is the sensor 2 is the clip 3 is an amplifier

Claims (1)

[Claims] Method 2 for detecting the respiratory state of a human or animal by using an element whose potential changes with changes in temperature or humidity 2 An element 1 whose potential changes with changes in temperature or humidity is placed in the nostril of a human or animal A device that is fixed to clip 2 and outputs using amplifier 3 that amplifies minute potential changes in 1.