Temperature determining device, temperature correcting method, and image forming apparatus
First Claim
1. A temperature determining device, comprising:
- a temperature detecting unit that detects a temperature of a determination object member based on an intensity of infrared rays from the object member;
a unit for determining a temperature for correction that determines a temperature of an opposing member opposed to the object member or a temperature of a member whose temperature changes in correlation to a change in the temperature of the opposing member; and
a calculating unit that corrects the detected temperature obtained by the temperature detecting unit using an environmental temperature around the temperature detecting unit and said temperature for correction,wherein the calculating unit includes at least a unit that multiplies the detected temperature obtained by the temperature detecting unit by a coefficient that changes in relation to said temperature for correction.
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Accused Products
Abstract
A temperature determining device is composed of a temperature detecting unit that detects a temperature of a determination object member based on an intensity of infrared rays from the object member, a unit for determining a temperature for correction that determines a temperature of an opposing member opposed to the object member or a temperature of a member whose temperature changes in correlation to a change in the temperature of the opposing member, and a calculating unit that corrects the detected temperature obtained by the temperature detecting unit using the temperature as the temperature for correction obtained by the unit for determining a temperature for correction. Thus, stable temperature determination can be performed accurately without being influenced by infrared rays from around a determination object member.
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Citations
34 Claims
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1. A temperature determining device, comprising:
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a temperature detecting unit that detects a temperature of a determination object member based on an intensity of infrared rays from the object member; a unit for determining a temperature for correction that determines a temperature of an opposing member opposed to the object member or a temperature of a member whose temperature changes in correlation to a change in the temperature of the opposing member; and a calculating unit that corrects the detected temperature obtained by the temperature detecting unit using an environmental temperature around the temperature detecting unit and said temperature for correction, wherein the calculating unit includes at least a unit that multiplies the detected temperature obtained by the temperature detecting unit by a coefficient that changes in relation to said temperature for correction. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A temperature correcting method, comprising:
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a first step of detecting a temperature of a determination object member based on an intensity of infrared rays from the object member; a second step of determining a temperature of an opposing member opposed to the object member or a temperature of a member whose temperature changes in correlation to a change in the temperature of the opposing member; a third step of correcting the detected temperature obtained in the first step using an environmental temperature around a temperature detecting unit that detects said temperature of the object member; and a fourth step of further correcting the detected temperature where the outcome of the third step is corrected based on a function of the temperature for correction obtained in the second step, wherein the fourth step includes at least a step of multiplying the detected temperature by a coefficient that changes in relation to the temperature for correction, wherein the temperature for correction is obtained in the second step. - View Dependent Claims (9, 10)
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11. An image forming apparatus comprising a fixing unit that allows a toner image transferred on a transferring material to be fixed on the transferring material by heating the toner image under pressure,
wherein the fixing unit comprises: -
a fixing member that is brought into contact with the transferring material so as to heat the transferring material; a heating source that heats the fixing member directly or indirectly; a temperature detecting unit that detects a surface temperature of the fixing member based on an intensity of infrared rays from the fixing member; a unit for determining a temperature for correction that determines a temperature of a constituent member of the fixing unit opposed to the fixing member or a temperature of a member whose temperature changes in correlation to a change in the temperature of the constituent member; and a calculating unit that corrects the detected temperature obtained by the temperature detecting unit using an environmental temperature around the temperature detecting unit and said temperature for correction, wherein the calculating unit includes at least a unit that multiplies the detected temperature obtained by the temperature detecting unit by a coefficient that changes in relation to said temperature for correction. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A temperature determining device, comprising:
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a temperature detecting unit that detects a temperature of a determination object member based on an intensity of infrared rays from the object member; a unit for determining a temperature for correction that determines a temperature of an opposing member opposed to the object member or a temperature of a member whose temperature changes in correlation to a change in the temperature of the opposing member; and a calculating unit that corrects the detected temperature obtained by the temperature detecting unit using an environmental temperature around the temperature detecting unit and said temperature for correction, wherein the calculating unit includes at least a unit that determines a correction amount and adds to the detected temperature the correction amount that decreases as the temperature for correction increases, after said detected temperature has been corrected based on a function of the environmental temperature. - View Dependent Claims (21, 22, 23, 24)
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25. A temperature correcting method, comprising:
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a first step of detecting a temperature of a determination object member based on an intensity of infrared rays from the object member; a second step of determining a temperature of an opposing member opposed to the object member or a temperature of a member whose temperature changes in correlation to a change in the temperature of the opposing member; a third step of further correcting the detected temperature obtained in the first step using an environmental temperature around a temperature detecting unit that detects said temperature of the object member; and a fourth step of further correcting the detected temperature where the outcome of the third step is corrected based on a function of the temperature for correction obtained in the second step, wherein the fourth step includes at least a step of determining a correction amount and adding to the detected temperature the correction amount that decreases as the temperature for correction increases, after said detected temperature has been corrected in the third step.
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26. An image forming apparatus comprising a fixing unit that allows a toner image transferred on a transferring material to be fixes on the transferring material by heating the toner image under pressure,
wherein the fixing unit comprises: -
a fixing member that is brought into contact with the transferring material so as to heat the transferring material; a heating source that heats the fixing member directly or indirectly; a temperature detecting unit that detects a surface temperature of the fixing member based on an intensity of infrared rays from the fixing member; a unit for determining a temperature for correction that determines a temperature of a constituent member of the fixing unit opposed to the fixing member or a temperature of a member whose temperature changes in correlation to a change in the temperature of the constituent member, and a calculating unit that corrects the detected temperature obtained by the temperature detecting unit using an environmental temperature around the temperature detecting unit and said temperature for correction, wherein the calculating unit includes at least a unit that determines a correction amount and adds to the detected temperature the correction amount that decreases as the temperature for correction increases, after said detected temperature has been corrected based on a function of the environmental temperature. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34)
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Specification