Environment sensor

Patent metadata

Field	Value
Publication number	US-11255733-B2
Application number	US-201816165300-A
Country	US
Kind code	B2
Filing date	Oct 19, 2018
Priority date	Nov 10, 2017
Publication date	Feb 22, 2022
Grant date	Feb 22, 2022

Abstract

An environment sensor includes a heat generation component, a first sensor and a second sensor disposed such that conductive heat resistances between the first sensor and the heat generation component and between the second sensor and the heat generation component are different from each other, and a controller. The first sensor and the second sensor are capable of measuring a predetermined physical quantity. The first sensor and the second sensor obtain a measured value from the predetermined physical quantity. The measured value fluctuates depending on ambient temperature. The controller is configured to correct the measurement value of one of the first sensor and the second sensor based on the measurement value of the first sensor and the measurement value of the second sensor when the predetermined physical quantity is measured.

First claim

The invention claimed is:

1. An environment sensor comprising:
a heat generation component;
a first sensor and a second sensor disposed such that conductive heat resistances between the first sensor and the heat generation component and between the second sensor and the heat generation component are different from each other;
a controller;
a memory storing a threshold value; and
a connection unit that connects the environment sensor to an external device,
wherein the first sensor and the second sensor are capable of measuring a predetermined physical quantity,
wherein the first sensor and the second sensor obtain a measurement value from the predetermined physical quantity,
wherein the measurement value fluctuates depending on ambient temperature,
wherein the controller is configured to correct the measurement value of one of the first sensor and the second sensor based on the measurement value of the first sensor and the measurement value of the second sensor when the predetermined physical quantity is measured,
wherein correcting the measurement value of one of the first sensor and the second sensor includes correcting the measurement value of one of the first sensor and the second sensor based on a difference between the measurement value of the first sensor and the measurement value of the second sensor when an increase in the measurement value of the first sensor per unit time and an increase in the measurement value of the second sensor per unit time are less than the threshold value, and
wherein the controller acquires a load factor relating to processing of the external device through the connection unit, and corrects the measurement value of the first sensor based on the load factor acquired from the external device through the connection unit and the measurement values of the first sensor and the second sensor when the predetermined physical quantity is measured.

2. The environment sensor according to claim 1 ,
wherein the first sensor is disposed at a position where the conductive heat resistance between the first sensor and the heat generation component is higher than the conductive heat resistance between the second sensor and the heat generation component, and
wherein the controller corrects the measurement value of the first sensor.

3. The environment sensor according to claim 2 , wherein the second sensor is disposed on a path through which heat is transferred from the heat generation component to the first sensor.

4. The environment sensor according to claim 2 , wherein the first sensor and the heat generation component are disposed on a substrate, and a cut is provided on the substrate between the first sensor and the heat generation component.

5. The environment sensor according to claim 1 , wherein the first sensor is a temperature sensor.

6. The environment sensor according to claim 3 , wherein the first sensor and the heat generation component are disposed on a substrate, and a cut is provided on the substrate between the first sensor and the heat generation component.

7. The environment sensor according to claim 2 , wherein the first sensor is a temperature sensor.

8. The environment sensor according to claim 3 , wherein the first sensor is a temperature sensor.

9. The environment sensor according to claim 4 , wherein the first sensor is a temperature sensor.

Assignees

• Omron Tateisi Electronics Co

Inventors

• Nakamura Kayo
• Ueda Naotsugu
• Sakai Ryusuke
• Mino Hiroyuki
• Motoki Yuhei
• Misumi Shuichi

Classifications

• G01K7/16

  using resistive elements · CPC title

• G01K1/20 Primary

  Compensating for effects of temperature changes other than those to be measured, e.g. changes in ambient temperature · CPC title

• G01K15/005

  Calibration · CPC title