Manufacturing method of heat flux sensor and heat flow generation device for use in the manufacturing method

Patent metadata

Field	Value
Publication number	US-10408690-B2
Application number	US-201615571895-A
Country	US
Kind code	B2
Filing date	Apr 20, 2016
Priority date	May 11, 2015
Publication date	Sep 10, 2019
Grant date	Sep 10, 2019

Abstract

According to a manufacturing method of a heat flux sensor, the heat flux sensor is sandwiched between a heater plate and a cooling unit. The heater plate is disposed on the first surface of the heat flux sensor, and the cooling unit is disposed on the second surface of the same. A heat radiation measurement plate is disposed on a surface of the heater plate opposite to the surface on which the heat flux sensor is disposed. According to this configuration, the temperature of the heater plate is controlled in an inspection process such that the heater plate is kept at an ambient temperature. This makes it possible to stabilize the temperature of the heater plate in a short time.

First claim

The invention claimed is:

1. A manufacturing method of a heat flux sensor comprising:
a first step of preparing a thin heat flux sensor;
a second step of preparing a heat flow generation device including a heating unit that has a thin heater plate with a heating resistor and a heat radiation measurement plate disposed on a first surface of the heater plate to measure heat leakage from the first surface and a cooling unit that is disposed on a second surface of the heater plate; and
a third step of
sandwiching the heat flux sensor between the heating unit and the cooling unit, heating the heat flux sensor by the heater plate and cooling the heat flux sensor by the cooling unit to generate a heat flow passing through the heat flux sensor,
measuring an output voltage from the heat flux sensor when a temperature of the heater plate is equal to an ambient temperature and the heat radiation measurement plate detects that there is no heat leakage, and
inspecting characteristics indicating the relationship between the rate of heat flow generated by the heater plate and the output voltage from the heat flux sensor based on the measurement result, wherein

an amount of heat absorbed by the cooling unit is adjusted by a cooling controller according to the heat leakage measured by the heat radiation measurement plate so that the temperature of the heater plate becomes equal to the ambient temperature.

2. The manufacturing method of a heat flux sensor according to claim 1 , wherein, at the second step, the heat radiation measurement plate configured in the same manner as the heat flux sensor is used.

3. The manufacturing method of a heat flux sensor according to claim 2 , wherein it is determined at the third step that there is no heat leakage when an output voltage from the heat radiation measurement plate falls within a range of error in the output voltage from the heat flux sensor.

4. The manufacturing method of a heat flux sensor according to claim 1 , wherein, at the second step, the heater plate is used in which the heating resistor formed by processing a metallic plate and patterning the same is sandwiched between resin films formed of a thermoplastic resin.

5. The manufacturing method of a heat flux sensor according to claim 1 , wherein, at the third step, an elastic flat plate is sandwiched between the heater plate and the heat radiation measurement plate.

6. The manufacturing method of a heat flux sensor according to claim 1 , wherein
at the first step, separate thermoelectric elements are included in a plurality of defined areas,
at the second step, the heat radiation measurement plate measuring heat leakage from each of the areas in the heat flux sensor is prepared, and
at the third step, the rate of heat flow generated by the heating resistor is measured and the rate of leaked heat flow is measured in each of the areas in the heat flux sensor to inspect the characteristics.

7. A heat flow generation device comprising:
a heating unit that has a thin heater plate with a heating resistor and a heat radiation measurement plate disposed on a surface of the heater plate opposite to the surface on which the heat flux sensor is disposed to measure heat leakage from the heater plate;
a cooling unit that is disposed on the opposite side of the heater plate with the heat flux sensor therebetween to cool the heat flux sensor; and
a movement mechanism that moves at least one of the cooling unit and the heating unit;
wherein the movement mechanism moves at least one of the cooling unit and the heating unit to press the heat flux sensor between the cooling unit and the heating unit.

8. A manufacturing method of a heat flux sensor comprising:
a first step of preparing a thin heat flux sensor;
a second step of preparing a heat flow generation device including
a heating unit that has a thin heater plate with a heating resistor and a heat radiation measurement plate disposed on a first surface of the heater plate to measure heat leakage from the first surface and
a cooling unit that is disposed on a second surface of the heater plate; and

a third step of
sandwiching the heat flux sensor between the heating unit and the cooling unit, heating the heat flux sensor by the heater plate and cooling the heat flux sensor by the cooling unit to generate a heat flow passing through the heat flux sensor,
measuring an output voltage from the heat flux sensor when the heat radiation measurement plate detects that there is no heat leakage, and
inspecting characteristics indicating the relationship between the rate of heat flow generated by the heater plate and the output voltage from the heat flux sensor based on the measurement result, wherein

at the first step, separate thermoelectric elements are included in a plurality of defined areas,
at the second step, the heat radiation measurement plate measuring heat leakage from each of the areas in the heat flux sensor is prepared, and
at the third step, the rate of heat flow generated by the heating resistor is measured and the rate of leaked heat flow is measured in each of the areas in the heat flux sensor to inspect the characteristics.

Assignees

• Denso Corp

Inventors

• Gouko Norio
• Sakaida Atusi
• Okamoto Keiji
• Shiraishi Yoshihiko

Classifications

• G01K17/00 Primary

  Measuring quantity of heat (measuring temperature by calorimetry G01K3/00 - G01K11/00; specially adapted for measuring thermal properties of materials, e.g. specific heat, heat of combustion G01N) · CPC title

• G01K17/20 Primary

  across a radiating surface, combined with ascertainment of the heat-transmission coefficient · CPC title

• G01J5/0205

  Mechanical elements; Supports for optical elements · CPC title

• G01N25/18

  by investigating thermal conductivity (by calorimetry G01N25/20; by measuring change of resistance of an electrically-heated body G01N27/18) · CPC title

• G01J5/12

  using thermoelectric elements, e.g. thermocouples · CPC title