Temperature sensor

Abstract

Provided is a temperature sensor capable of securing a detection temperature range and detection temperature accuracy in each of a plurality of areas, even when a plurality of areas having different temperature ranges are included in the detection area of the temperature sensor. This temperature sensor (1) comprises a processing circuit unit (120). The processing circuit unit (120) generates a temperature information signal on the basis of detection signals output from each of a plurality of infrared detection elements. The temperature information signal includes temperature information for a detection area. The processing circuit unit (120) comprises a correction processing unit (127) that performs a correction process on the detection signal. The correction processing unit (127) has first correction information and second correction information. The first correction information is information for performing the correction process on the detection signal output from a first infrared detection element. The second correction information is information for performing the correction process on the detection signal output from a second infrared detection element (22).

Description

Temperature sensor 【0001】 The present disclosure relates to a temperature sensor, and more particularly to a temperature sensor having a detection region including a plurality of regions with different temperature ranges. 【0002】 The temperature sensor described in Patent Document 1 includes a plurality of infrared detection elements that detect infrared rays radiated from a target object, and an arithmetic unit that corrects detection signals output from each of the plurality of infrared detection elements. 【0003】 In a temperature sensor as described in Patent Document 1, when a plurality of regions with different temperature ranges are included in the detection region of the temperature sensor, the arithmetic unit uses common correction information to correct the detection signals corresponding to each of the plurality of regions. For this reason, in each of the plurality of regions, a detection temperature range can be ensured, but there is a problem that the detection temperature accuracy decreases due to a decrease in the resolution of the detection temperature. 【0004】 Japanese Unexamined Patent Application Publication No. 2012 - 13517 【0005】 An object of the present disclosure is to provide a temperature sensor capable of ensuring a detection temperature range and detection temperature accuracy in each of a plurality of regions even when the detection region of the temperature sensor includes a plurality of regions with different temperature ranges. 【0006】A temperature sensor according to one aspect of the present disclosure is a temperature sensor having a detection region. The detection region has a first region and a second region. The first region corresponds to a first temperature range. The second region corresponds to a second temperature range. The second temperature region has an upper limit and a lower limit that are outside the range of the first temperature range. The temperature sensor comprises a plurality of infrared detection elements and a processing circuit. The plurality of infrared detection elements include a first infrared detection element and a second infrared detection element. The first infrared detection element detects infrared radiation in the first temperature range. The second infrared detection element detects infrared radiation in the second temperature range. The processing circuit generates a temperature information signal including temperature information of the detection region based on detection signals output from each of the plurality of infrared detection elements. The processing circuit includes a correction processing unit that performs correction processing on the detection signal. The correction processing unit has first correction information and second correction information. The first correction information is correction information for performing the correction processing on the detection signal output from the first infrared detection element. The second correction information is correction information for performing the correction processing on the detection signal output from the second infrared detection element. 【0007】 Figure 1 is a block diagram of a temperature sensor according to Embodiment 1. Figure 2 is an explanatory diagram illustrating the correspondence between the multiple pixel units of the infrared sensor in Figure 1 and the first and second regions of the detection area. Figure 3 is an explanatory diagram illustrating an example of the installation location of the same temperature sensor. Figure 4 is an explanatory diagram illustrating the output voltage characteristics of the same infrared sensor. Figure 5 is an explanatory diagram illustrating the correspondence between the multiple pixel units and the first and second regions of the detection area in Modification Example 1. Figure 6 is an explanatory diagram illustrating another correspondence between the multiple pixel units and the first and second regions of the detection area in Modification Example 1. Figure 7 is an explanatory diagram illustrating the installation location of a temperature sensor according to Modification Example 2. Figure 8 is an explanatory diagram illustrating the installation location of a temperature sensor according to Modification Example 3. Figure 9 is an explanatory diagram illustrating the detection area of ​​the same temperature sensor. Figure 10 is a flowchart illustrating the operation of the correction processing unit of the temperature sensor according to Embodiment 2. Figure 11 is a flowchart illustrating the operation of the correction processing unit of the temperature sensor according to Embodiment 3. 【0008】 The infrared sensor according to this embodiment will be described below with reference to Figures 1 to 4. 【0009】 (Embodiment 1) (1) As shown in the schematic diagram 1, the temperature sensor 1 according to Embodiment 1 has a detection area W1 including a first area W11 and a second area W12 (see Figure 3). The first area W11 is an area corresponding to a first temperature range. The second area W12 is an area corresponding to a second temperature range in which either the upper limit or the lower limit is outside the range of the first temperature range. The temperature sensor 1 comprises a plurality of infrared detection elements 2a (see Figure 2) and a processing circuit unit 120. The plurality of infrared detection elements 2a include a first infrared detection element 21 and a second infrared detection element 22. The first infrared detection element 21 (see Figure 2) detects infrared radiation in the first temperature range. The second infrared detection element 22 (see Figure 2) detects infrared radiation in the second temperature range. The processing circuit unit 120 generates a temperature information signal based on the detection signals output from each of the plurality of infrared detection elements 2a. The temperature information signal includes temperature information of the detection area. The processing circuit unit 120 includes a correction processing unit 127 that performs correction processing on the detection signal. The correction processing unit 127 has first correction information and second correction information. The first correction information is information for performing correction processing on the detection signal output from the first infrared detection element 21. The second correction information is information for performing correction processing on the detection signal output from the second infrared detection element 22. 【0010】 With this configuration, correction information (first correction information and second correction information) is set for each region (first region W11 and second region W12) with different temperature ranges in the detection region W1 of the temperature sensor 1. As a result, corrections can be made according to the temperature range for each region (first region W11 and second region W12) with different temperature ranges in the detection region W1 of the temperature sensor 1, thereby ensuring the detection temperature range and detection temperature accuracy. 【0011】 (2) Details Below, the temperature sensor 1 according to Embodiment 1 will be described in more detail. 【0012】(2-1) As shown in the configuration diagram 1, the temperature sensor 1 of the embodiment 1 detects infrared radiation C1 emitted from the detection area W1 including the target object 400, generates a thermal image of the detection area W1, and detects the temperature of the detection area W1 including the target object 400. The temperature sensor 1 comprises an infrared sensor 100, a thermistor 110, a processing circuit unit 120, and an infrared transmitting member 153. 【0013】 The target object may be, for example, a person, or a stove 52 in a kitchen 59 (see Figure 3). 【0014】 The infrared sensor 100 is a sensor that generates a thermal image of a detection region W1 by detecting (receiving) infrared radiation C1 emitted from the detection region W1 which includes the target object 400. The infrared sensor 100 has a plurality of pixel units 2 that correspond one-to-one with a plurality of pixels that constitute the thermal image (see Figure 2). The plurality of pixel units 2 are arranged in a two-dimensional array (i.e., matrix) of a rows and b columns (8 rows and 8 columns in the example of Figure 2) on one main surface of a substrate (e.g., a semiconductor substrate). In the example of Figure 2, a=8 and b=8, but it is sufficient if a≧2 and b≧2. Each of the plurality of pixel units 2 is composed of an infrared detection element 2a. The infrared detection element 2a includes a temperature sensing unit and a MOS transistor. The temperature sensing unit is a thermoelectric conversion unit composed of a thermopile that converts thermal energy from infrared radiation C1 emitted from the target object 400 into electrical energy. The MOS transistor is a circuit element for extracting the output voltage of the temperature sensing unit. 【0015】 The infrared sensor 100 comprises a (eight) first wirings, b (eight) second wirings, a (eight) third wirings, and a (eight) fourth wirings. The a first wirings are connected in common to each row, with one end of the temperature-sensing portion of a pixel portion 2 in each row being connected via the source-drain of the corresponding MOS transistor. The b second wirings are connected in common to each column, with the gates of the MOS transistors corresponding to the temperature-sensing portions of a pixel portion 2 in each column being connected. The a third wirings are connected in common to each row, with the well regions of the MOS transistors of b pixel portions 2 in each row being connected. The a fourth wirings are connected in common to each row, with the other ends of the temperature-sensing portions of b pixel portions 2 in each row being connected. 【0016】 The infrared sensor 100 comprises a number of first pads P1 to Pa, b number of second pads Q1 to Qb, a third pad R1, and a fourth pad T1. The a number of first pads P1 to Pa are output pads to which a number of first wirings are individually connected. The voltage of the temperature sensing part of the pixel part 2 connected to the first wirings to which the first pads P1 to Pa are connected is output from the first pads P1 to Pa. The b number of second pads Q1 to Qb are pixel part selection pads to which b number of second wirings are individually connected. The third pad R1 is a pad to which a number of third wirings are commonly connected. The fourth pad T1 is a reference bias pad to which a number of fourth wirings are commonly connected. 【0017】 A predetermined voltage is applied to the third pad R1, and a predetermined reference bias voltage is applied to the fourth pad T1. In this applied state, the b second pads Q1 to Qb are sequentially supplied with an on-voltage (i.e., a voltage to turn on the MOS transistor), so that the output voltages of the temperature-sensing parts of the a pixel units 2 connected to the second pads to which the on-voltage is applied are output from the a first pads P1 to Pa. In this way, the infrared sensor 100 is able to sequentially output the output voltages of the temperature-sensing parts of all the pixel units 2. The output voltages of the temperature-sensing parts of all the pixel units 2 constitute the data of each image in the thermal image of the detection area W1 of the infrared sensor 100 (i.e., the detection area of ​​the temperature sensor 1). 【0018】 The infrared-transmitting member 153 is positioned in front of the infrared sensor 100 and collects the infrared radiation C1 emitted from the detection area W1, which includes the target object 400, and allows the infrared sensor 100 to receive it. The infrared-transmitting member 153 is made up of, for example, a lens. However, the infrared-transmitting member 153 is not limited to a lens and may be, for example, a flat plate. 【0019】 The thermistor 110 is a temperature sensor for detecting the temperature of the infrared sensor 100. The thermistor 110 is positioned close to the infrared sensor 100 and outputs an analog output voltage corresponding to the temperature of the infrared sensor 100. The thermistor 110 being positioned close to the infrared sensor 100 means that there are no other objects between the thermistor 110 and the infrared sensor 100. 【0020】 The processing circuit unit 120 calculates the temperature of the detection area W1 including the target object 400 based on the output voltage of the infrared sensor 100 (i.e., the output voltage of each of the multiple pixel units 2) and the output voltage of the thermistor 110 (i.e., the temperature of the infrared sensor 100). Then, based on the calculation result, the processing circuit unit 120 generates a temperature information signal that includes temperature information indicating the temperature of the detection area W1 including the target object 400. 【0021】 The processing circuit unit 120 includes a plurality of connection pads (a first connection pads p1 to pa, b second connection pads q1 to qb, a third connection pad r1 and a fourth connection pad t1), a multiplexer 121, a first amplification circuit 122a, a correction processing unit 127, a second amplification circuit 122b, an A / D conversion circuit 123, a calculation unit 124, a memory 125, and a control circuit 126. 【0022】 The a first connection pads p1 to pa are electrically connected in a one-to-one correspondence with the a first pads P1 to Pa of the infrared sensor 100. The first connection pads p1 to pa receive the voltage of the temperature sensing part of the pixel unit 2 connected to the first wiring connected to the first pads P1 to Pa. The b second connection pads q1 to qb are electrically connected in a one-to-one correspondence with the b second pads Q1 to Qb of the infrared sensor 100. The b second connection pads q1 to qb are sequentially turned on by the control circuit 126, as described later. The third connection pad r1 is electrically connected to the third pad R1 of the infrared sensor 100. The third connection pad r1 is subjected to a predetermined voltage by the control circuit 126, as described later, and this voltage application applies a predetermined voltage to the third pad R1 as described above. The fourth connection pad t1 is electrically connected to the fourth pad T1 of the infrared sensor 100. As described later, a predetermined reference bias voltage is applied to the fourth connection pad t1 by the control circuit 126, and this voltage application applies a predetermined reference bias voltage to the fourth pad T1 as described above. 【0023】The multiplexer 121 inputs the output voltages of the a first connection pads p1 to pa (i.e., the output voltages of the temperature-sensing parts of the pixel units 2 connected to the a first pads P1 to Pa of the infrared sensor 100) one by one into the first amplification circuit 122a. As a result, the output voltages of the temperature-sensing parts of all the pixel units 2 of the infrared sensor 100 are input one by one into the first amplification circuit 122a. 【0024】 The first amplification circuit 122a amplifies the output voltage of each pixel 2 of the infrared sensor 100 that is input from the multiplexer 121. More specifically, the first amplification circuit 122a receives the output voltage of the temperature sensing part of each pixel 2 from the multiplexer 121 one by one and amplifies the input output voltages one by one in sequence. 【0025】 The correction processing unit 127 corrects the output voltage of the temperature sensing element of each pixel 2 from the infrared sensor 100 (i.e., the detection signal output from each infrared detection element 2a). More specifically, the correction processing unit 127 corrects (i.e., amplifies) the detection signal output from each infrared detection element 2a so that the resolution of the detected temperature obtained from this detection signal is optimized. Resolution optimization means adjusting the resolution to the upper limit of the design resolution. In Embodiment 1, the correction processing unit 127 is connected downstream of the first amplification circuit 122a, and corrects the output signal of the first amplification circuit 122a (i.e., the detection signal amplified by the first amplification circuit) so that the detection signal output from each infrared detection element 2a is corrected so that the resolution of the detected temperature is optimized. Details of the processing of the correction processing unit 127 will be described later. 【0026】 The second amplification circuit 122b amplifies the output voltage of the thermistor 110 by a predetermined amplification factor. 【0027】 The A / D conversion circuit 123 converts the output voltage of the infrared sensor 100, which has been amplified by the first amplification circuit 122a and corrected by the correction processing unit 127, and the output voltage of the thermistor 110, which has been amplified by the second amplification circuit 122b, from analog values ​​to digital values. 【0028】 The memory 125 is, for example, a non-volatile storage device that stores data and calculation results used in calculations (calculations) performed by the arithmetic unit 124. 【0029】 The control circuit 126 controls the infrared sensor 100 and the multiplexer 121. More specifically, the control circuit 126 applies a predetermined voltage to the third connection pad r1 and a predetermined reference bias voltage to the fourth connection pad t1. By applying the predetermined voltage to the third connection pad r1 in this way, a predetermined voltage is applied to the third pad R1 of the infrared sensor 100 as described above. Also, by applying the predetermined reference bias voltage to the fourth connection pad t1 as described above, a predetermined reference bias voltage is applied to the fourth pad T1 of the infrared sensor 100 as described above. Then, with the predetermined voltage and the predetermined reference bias voltage applied, the control circuit 126 sequentially applies ON voltages to the b second connection pads q1 to qb. As a result, ON voltages are sequentially applied to the b second pads Q1 to Qb of the infrared sensor 100. As a result, the output voltage of the temperature-sensing parts of the a pixels 2 connected to the second wiring connected to the second pads Q1 to Qb to which the ON voltage is applied is input to the a first connection pads p1 to pa. 【0030】 More specifically, the control circuit 126 sets a predetermined voltage to be applied to the third connection pad r1 to, for example, 1.2V, and a predetermined reference bias voltage to be applied to the fourth connection pad t1 to, for example, 1.2V. Then, if the control circuit 126 applies an ON voltage of, for example, 5V to the b second connection pads q1 to qb in sequence, the MOS transistors of the pixel unit 2 to which the ON voltage is applied will turn on, and the output voltage of the temperature sensing part of the pixel unit 2 to which the ON voltage is applied will be input to the first connection pads p1 to pa. Furthermore, if the control circuit 126 applies an OFF voltage of 0V to the second connection pads q1 to qb to which the ON voltage is not applied, the MOS transistors of the pixel unit 2 to which the OFF voltage is applied will turn off, and the output voltage of the temperature sensing part of the pixel unit 2 to which the OFF voltage is applied will not be input to the first connection pads p1 to pa. 【0031】The calculation unit 124 uses the digital values ​​output from the A / D conversion circuit 123 corresponding to the respective output voltages of the infrared sensor 100 and the thermistor 110 to calculate the temperature of the detection region W1 including the target object 400. More specifically, the calculation unit 124 uses the calculation formula in Equation 1 to calculate the temperature To at each pixel of the thermal image showing the detection region W1 including the target object 400. In the following description, "output voltage of the temperature sensing element of the pixel unit 2" may be simply referred to as "output voltage of the pixel unit 2". 【0032】 【0033】 More specifically, the calculation unit 124 performs the calculation of Equation 1 using the values ​​(data) of coefficients A, B, D, E, and G pre-stored in the memory 125, the output voltage Vout of a certain pixel 2 of the infrared sensor 100, and the temperature Ts of the infrared sensor 100 measured by the thermistor 110. Based on this calculation, the correction processing unit 127 calculates the temperature of the detection region W1 including the target object 400. Then, the calculation unit 124 generates temperature information indicating the temperature of the detection region W1 based on the calculation result, and generates a temperature information signal including the generated temperature information. 【0034】 The output voltage Vout of the infrared sensor 100 is the output voltage of a certain pixel 2, which is amplified by the first amplification circuit 122a, corrected by the correction processing unit 127, converted to a digital value by the A / D conversion circuit 123, and input to the calculation unit 124. The temperature Ts of the infrared sensor 100 is the temperature, which is input to the calculation unit 124, which is obtained by amplified by the second amplification circuit 122b of the output voltage of the thermistor 110 corresponding to temperature Ts, converted to a digital value by the A / D conversion circuit 123, and input to the calculation unit 124. An example of coefficients A, B, D, E, and G is shown in Table 1 below. 【0035】 【0036】The temperature sensor 1 further comprises a package. The package houses an infrared sensor 100, a thermistor 110, and a processing circuit unit 120. The package has a package body and a package lid. The infrared sensor 100, thermistor 110, and the processing circuit unit 120 are fixed to the package body. The package lid is hermetically joined to the package body, surrounding the infrared sensor 100, thermistor 110, and the processing circuit unit 120. The package lid has an opening window in the area corresponding to the infrared sensor 100. An infrared transmitting member 153 is provided on the package lid so as to close the opening window. 【0037】 (2-2) Detailed view of the temperature sensor's detection area As shown in Figure 3, the temperature sensor 1 detects (receives) infrared radiation emitted from the detection area W1 which includes the target object 400. The detection area W1 is a two-dimensional area which includes the location where the target object 400 is placed. The detection area W1 of the temperature sensor 1 is the detection area of ​​the infrared sensor 100. 【0038】 The detection area W1 of the temperature sensor 1 includes a first area W11 corresponding to a first temperature range and a second area W12 corresponding to a second temperature range. The first area W11 corresponding to the first temperature range is an area that emits infrared radiation in the first temperature range. The second area W12 corresponding to the second temperature range is an area that emits infrared radiation in the second temperature range. The first temperature range is, for example, room temperature (e.g., a temperature range of 25°C or higher and 50°C or lower). The second temperature range is, for example, a temperature range higher than the first temperature range (e.g., a range of 50°C or higher and 350°C or lower). Either the upper limit (350°C) or the lower limit (50°C) of the second temperature range (e.g., the upper limit) is outside the range of the first temperature range (25°C or higher and 50°C or lower). 【0039】In the example shown in Figure 3, the temperature sensor 1 is installed on the wall 50 of the kitchen 59, and the detection direction of the temperature sensor 1 is directed diagonally downward. The detection direction of the temperature sensor 1 is the same as the detection direction of the infrared sensor 100, and the detection direction of the infrared sensor 100 is the normal direction of the plane on which the multiple infrared detection elements 2a are arranged. In the above-described installation of the temperature sensor 1, the detection area W1 of the temperature sensor 1 is set to include the stove 52 installed on the stovetop 51 of the kitchen 59. The stove 52 is an example of the target object 400. The second area W12 is set to include the stove 52 installed on the stovetop 51. The first area W11 is set to include the area of ​​the stove 52 opposite to the wall 50 (i.e., the area where a person stands). The first area W11 is adjacent to the second area W12. 【0040】 In the example shown in Figure 3, the first region W11, which does not include the stove 52, is set to a first temperature range of, for example, room temperature of 25°C to 50°C, as described above, because there is no heat generated by the stove 52. The second region W2, which includes the stove 52, becomes hot due to the heat generated by the stove 52, and is set to a second temperature range of, for example, high temperature of 50°C to 350°C, as described above. 【0041】 As shown in Figure 2, the plurality of infrared detection elements 2a arranged in a row a and b column (for example, 8 rows and 8 columns) of the infrared sensor 100 include at least one first infrared detection element 21 and at least one second infrared detection element 22. The first infrared detection element 21 is an infrared detection element 2a that detects infrared radiation in a first temperature range emitted from a first region W11. The second infrared detection element 22 is an infrared detection element 2a that detects infrared radiation in a second temperature range emitted from a second region W2. 【0042】When the first region W11 and the second region W12 are set as shown in FIG. 3, as shown in FIG. 2, out of the plurality of infrared detection elements 2a arranged in a rows and b columns (8 rows and 8 columns in the example of FIG. 2), each of the plurality of infrared detection elements 2a in the half (for example, the right side in FIG. 2) of one side, which is 8 rows and 4 columns, is, for example, the first infrared detection element 21. Also, out of the plurality of infrared detection elements 2a in a rows and b columns (8 rows and 8 columns in the example of FIG. 2), each of the plurality of infrared detection elements 2a in the half (for example, the left side in FIG. 2) of the other side, which is 8 rows and 4 columns, is, for example, the second infrared detection element 22. 【0043】 (2-3) Characteristics of Output Voltage of Infrared SensorFIG. 4 shows a graph G1 showing the characteristics of the output voltage of each pixel unit 2 of the infrared sensor 100. 【0044】 As shown in FIG. 4, the output voltage Vout of the pixel unit 2 has the characteristic that it decreases more rapidly as the temperature Ta of the target object is higher. For this reason, when the width of the temperature range of the target object is constant, the wider the temperature range of the target object is on the high-temperature side, the wider the width of the output voltage Vout of the pixel unit 2 becomes. For this reason, when comparing the width ΔV1 of the voltage range of the output voltage Vout of the pixel unit 2 corresponding to the first temperature range of normal temperature of the target object (for example, a temperature range of 25°C or more and 50°C or less) and the width ΔV2 of the voltage range of the output voltage Vout of the pixel unit 2 corresponding to the second temperature range of high temperature of the target object (for example, a temperature range of 50°C or more and 350°C or less), the width ΔV2 becomes larger than the width ΔV1 by more than the difference between the width of the first temperature range of normal temperature and the width of the second temperature range of high temperature. 【0045】 For this reason, regardless of whether the temperature range of the detection signal (that is, the output voltage Vout of each pixel unit 2) output from the infrared detection element 2a is in the first temperature range or the second temperature range, in order for the correction processing unit 127 to correct (that is, amplify) the detection signal so that the resolution of the detection temperature is optimized, it is necessary to change the correction information (that is, the amplification factor) used in the correction processing to the first correction information (that is, the first amplification factor) or the second correction information (that is, the second amplification factor) according to the temperature range of the detection signal (the first temperature range or the second temperature range). 【0046】(2-4) Details of the correction processing The correction processing unit 127 corrects the detection signals output from each of the plurality of infrared detection elements 2a amplified by the first amplification circuit 122a (that is, the output voltages of each of the plurality of pixel units 2) using correction information so that the resolution of the detected temperature obtained from this detection signal is optimized. The correction information specifies the amplification factor of the detection signal. The correction processing unit 127 amplifies the detection signal at the amplification factor specified by the correction information. That is, the correction processing unit 127 performs gain adjustment of the detection signal using the correction information. 【0047】 More specifically, the correction processing unit 127 changes the correction information (that is, the amplification factor) used in the correction processing to the first correction information or the second correction information described later according to the temperature range of the detection signal to be corrected. The temperature range of the detection signal is the temperature range of the infrared rays detected by the infrared detection element 2a that outputs the detection signal. Therefore, the temperature range of the detection signal (the first detection signal) output from the first infrared detection element 21 is the first temperature range described above. Also, the temperature range of the detection signal (the second detection signal) output from the second infrared detection element 22 is the second temperature range described above. 【0048】 The correction processing unit 127 has the first correction information and the second correction information. The first correction information is correction information for performing correction processing on the first detection signal output from the first infrared detection element 21. The first correction information specifies the amplification factor (the first amplification factor) for amplifying the first detection signal. The second correction information is correction information for performing correction processing on the second detection signal output from the second infrared detection element 22. The second correction information specifies the amplification factor (the second amplification factor) for amplifying the second detection signal. The first correction information and the second correction information are stored in a predetermined storage device (for example, the memory 125) provided in the processing circuit unit 120. 【0049】 The correction processing unit 127 determines whether the detection signal to be corrected (in the example of FIG. 1, the output signal of the first amplification circuit 122a) is the first detection signal or the second detection signal. 【0050】Then, if the detection signal to be corrected (i.e., the output signal of the first amplification circuit 122a) is the first detection signal (i.e., the temperature range of the detection signal is within the first temperature range), the correction processing unit 127 amplifies the first detection signal using the first correction information as part of the correction processing. In other words, the correction processing unit 127 amplifies the first detection signal at the first amplification factor specified by the first correction information. In other words, the correction processing unit 127 adjusts the gain of the first detection signal using the first correction information. As a result, the first detection signal is amplified so that the voltage width of the voltage range corresponding to the temperature range of the first detection signal (i.e., the first temperature range) matches the voltage width of the input voltage range when the correction processing unit 127 receives the detection signal (in this case, the first detection signal). Through this amplification, the first detection signal is corrected (amplified) so that the resolution of the detection temperature obtained from the first detection signal is optimized. As a result, the detection temperature range and detection temperature accuracy of the first detection signal are ensured. 【0051】 Furthermore, if the detection signal to be corrected (i.e., the output signal of the first amplification circuit 122a) is the second detection signal (i.e., the temperature range of the detection signal is within the second temperature range), the correction processing unit 127 amplifies the second detection signal using the second correction information as part of the correction process. That is, the correction processing unit 127 amplifies the second detection signal at the second amplification factor specified by the second correction information. In other words, the correction processing unit 127 adjusts the gain of the second detection signal (detection signal) using the second correction information. As a result, the second detection signal is amplified so that the voltage width of the voltage range corresponding to the temperature range of the second detection signal (i.e., the second temperature range) matches the voltage width of the input voltage range when the correction processing unit 127 receives the detection signal (in this case, the second detection signal). Through this amplification, the second detection signal is corrected (amplified) so that the resolution of the detection temperature obtained from the second detection signal is optimized. As a result, the detection temperature range and detection temperature accuracy of the second detection signal are ensured. 【0052】In this way, the correction processing unit 127 changes the correction information (first correction information or second correction information) used in the correction process according to the temperature range of the detected signal (first temperature range or second temperature range). As a result, the detected signal can be corrected (amplified) to optimize the resolution of the detected temperature across the entire temperature range of the detected signal, thereby ensuring the detection temperature range and detection temperature accuracy of the detected signal. 【0053】 (2-5) The temperature sensor 1 according to the first embodiment is a temperature sensor 1 having a detection region W1. The detection region W1 has a first region W11 and a second region W12. The first region W11 corresponds to a first temperature range. The second region W12 corresponds to a second temperature range. In the second temperature region, either the upper limit or the lower limit is outside the range of the first temperature range. The temperature sensor 1 comprises a plurality of infrared detection elements 2a and a processing circuit unit 120. The plurality of infrared detection elements 2a include a first infrared detection element 21 and a second infrared detection element 22. The first infrared detection element 21 detects infrared radiation C1 in the first temperature range. The second infrared detection element 22 detects infrared radiation C1 in the second temperature range. The processing circuit unit 120 generates a temperature information signal including temperature information of the detection region W1 based on the detection signals output from each of the plurality of infrared detection elements 2a. The processing circuit unit 120 includes a correction processing unit 127 that performs correction processing of the detection signal. The correction processing unit 127 includes first correction information and second correction information. The first correction information is correction information for performing correction processing on the detection signal output from the first infrared detection element 21. The second correction information is correction information for performing correction processing on the detection signal output from the second infrared detection element 22. 【0054】 With this configuration, correction information (first correction information and second correction information) is set for each region (first region W11 and second region W12) with different temperature ranges in the detection region W1 of the temperature sensor 1. This allows correction according to the temperature range to be performed for each region with different temperature ranges in the detection region W1 of the temperature sensor 1, thereby ensuring the detection temperature range and detection temperature accuracy. 【0055】Furthermore, in the temperature sensor 1 according to Embodiment 1, the correction processing unit 127 performs gain adjustment on the detection signal output from the first infrared detection element 21 using first correction information. The correction processing unit 127 also performs gain adjustment on the detection signal output from the second infrared detection element 22 using second correction information. 【0056】 With this configuration, gain adjustment is performed by changing the correction information in the first region W11 and the second region W12. This ensures the detection temperature accuracy and detection temperature range in the first region W11 and the second region W12, respectively. 【0057】 Furthermore, in the temperature sensor 1 according to Embodiment 1, the temperature sensor 1 is installed on the wall 50 of the kitchen 59. The second region W12 is the region including the stove 52 installed on the stovetop 51 of the kitchen 59. The first region W11 is the region that does not include the stove 52. 【0058】 With this configuration, when the temperature sensor 1 is installed in the kitchen 59, the detection temperature accuracy and detection temperature range can be ensured in both the first region W11, which does not include the stove 52, and the second region W12, which includes the stove 52 in the kitchen 59, within the detection region W1 of the temperature sensor 1. 【0059】 (2-6) Modified Examples Below, modified examples of Embodiment 1 will be described. In the following description, components similar to those in Embodiment 1 may be denoted by the same reference numerals and their descriptions may be omitted. The modified examples described below can be applied in combination. 【0060】 (2-6-1) Modification 1 Modification 1 describes a modification of the arrangement of the first infrared detection element 21 and the second infrared detection element 22. The arrangement of the first infrared detection element 21 and the second infrared detection element 22 may be the arrangement shown in Figure 5 or Figure 6. 【0061】In the arrangement shown in Figure 5, at least one first infrared detection element 21 is one of the multiple infrared detection elements 2a arranged in a row a and b column (8 rows and 8 columns), specifically the upper (for example, 3 rows and 8 columns) portion, and at least one second infrared detection element 22 is one of the multiple infrared detection elements 2a arranged in the lower (for example, 5 rows and 8 columns) portion. In the example in Figure 5, the boundary K1 between the arrangement of the first infrared detection elements 21 and the arrangement of the second infrared detection elements 22 is shifted upward from the vertical center, but it may be the vertical center or shifted downward from the vertical center. Furthermore, the upper multiple infrared detection elements 2a may be at least one second infrared detection element 22, and the lower multiple infrared detection elements 2a may be at least one first infrared detection element 21. 【0062】 In the arrangement shown in Figure 6, at least one second infrared detection element 22 is one of the multiple infrared detection elements 2a arranged in a row a and b column (8 rows and 8 columns), specifically the multiple infrared detection elements 2a in the center (for example, 4 rows and 4 columns), and at least one first infrared detection element 21 is one of the remaining multiple infrared detection elements 2a in the periphery. In the example in Figure 6, the multiple infrared detection elements 2a in the center (for example, 4 rows and 4 columns) may be at least one first infrared detection element 21, and the remaining multiple infrared detection elements 2a in the periphery may be at least one second infrared detection element 22. 【0063】 (2-6-2) Modification 2 As shown in Figure 7, in Modification 2, the temperature sensor 1 is installed in a range hood 54 positioned above a stove 55 installed on a stovetop 53 in the kitchen 60, and the detection direction of the temperature sensor 1 is directed downwards. There are no walls on either side of the stovetop 53 (left and right sides in Figure 7), and it is possible for a person to stand there. In this installation state of the temperature sensor 1, the detection area W1 of the temperature sensor 1 is set to include the stovetop 53. 【0064】In the modified example 2, the detection region W1 includes two first regions W11a and W11b and one second region W12. The second region W12 is configured to include the stove 55 installed on the stove stand 53. The first region W11a is configured to include the area on the first side of the stove stand 53 (left side in Figure 7) where a person can stand. The first region W11b is configured to include the area on the second side of the stove stand 53 (i.e., the opposite side from the first side, right side in Figure 7) where a person can stand. The first regions W11a and W11b are regions corresponding to the first temperature range (room temperature range), as in the first embodiment, and the second region W12 is a region corresponding to the second temperature range (high temperature range), as in the first embodiment. 【0065】 In the modified example 2, the temperature sensor 1 is installed in the range hood 54 of the kitchen 60. The second region W12 is the region that includes the stove 55 installed on the stovetop 53 of the kitchen 60. The first region W11 is the region that does not include the stove 55. With this configuration, when the temperature sensor 1 is installed in the kitchen 60, the detection temperature accuracy and detection temperature range can be ensured in both the first region W11, which does not include the stove 55, and the second region W12, which includes the stove 55 of the kitchen 60, within the detection region W1 of the temperature sensor 1. 【0066】 (2-6-3) Modification 3 As shown in Figures 8 and 9, in Modification 3, the temperature sensor 1 is installed on the back surface 58a of the door 58 of the refrigerator 56, and the detection direction of the temperature sensor 1 is directed towards the inside of the refrigerator 56 when the door 58 is closed. Figure 8 is a plan view of the refrigerator 56 with the door 58 open and the opening 57a on the top surface of the refrigerator 56 viewed from above. Figure 9 is a cross-sectional view of the refrigerator 56 with the door 58 closed and viewed from the side of the refrigerator 56. 【0067】The refrigerator 56 comprises a refrigerator body 57 and a door 58. The refrigerator body 57 is a rectangular box shape with an opening 57a on its top surface. Inside the refrigerator body 57, there is a storage recess 57b that communicates with the opening 57a. A partition 57c is provided in the center of the storage recess 57b. The storage recess 57b is divided by the partition 57c into a first storage recess 57d and a second storage recess 57e. The first storage recess 57d is set to a first temperature range of room temperature (for example, a temperature range of 25°C to 50°C). The first storage recess 57d is, for example, a refrigerator compartment. Hereafter, it may be referred to as the refrigerator compartment 57d. The second storage recess 57e is set to a second temperature range of lower temperature than the first temperature range (for example, a temperature range of -40°C to 25°C). The second storage recess 57e is, for example, a freezer compartment. Hereafter, it may be referred to as the freezer compartment 57e. The door 58 opens and closes the opening 57a of the refrigerator body 57. That is, the door 58 opens and closes both the freezer compartment 57e and the refrigerator compartment 57d. In the example shown in Figure 8, one side of the door 58 is connected to one side of the opening 57a by a hinge 58b. 【0068】 The temperature sensor 1 is installed on the back surface 58a of the door 58, at a location above the partition 57c when the door is closed. 【0069】 In the modified example 3, the detection area W1 of the temperature sensor 1 includes a first area W11 and a second area W12. When the door 58 of the refrigerator 56 is closed, the first area W11 is set to be included inside the first housing recess 57d. The second area W12 is set to be included inside the second housing recess 57e. The first area W11 is the area corresponding to the first temperature range (room temperature range), and the second area W12 is the area corresponding to the second temperature range (low temperature range). 【0070】 In the modified example 3, the temperature sensor 1 can detect the temperature of the internal space of the first storage recess 57d and the second storage recess 57e of the refrigerator 56. 【0071】In the temperature sensor 1 according to Modification 3, the temperature sensor 1 is installed on the back surface 58a of the door 58 of the refrigerator 56. The refrigerator 56 has a freezer compartment 57e and a refrigerator compartment 57d separated by a partition 57c. The door 58 is a single door that opens and closes the freezer compartment 57e and the refrigerator compartment 57d. The first region W11 is the region including the refrigerator compartment 57d. The second region W12 is the region including the freezer compartment 57e. With this configuration, when the temperature sensor 1 is installed in the refrigerator 56, the detection temperature accuracy and detection temperature range can be ensured in both the first region W11, which includes the refrigerator compartment 57d of the refrigerator 56, and the second region W12, which includes the freezer compartment 57e of the refrigerator 56, within the detection region W1 of the temperature sensor 1. 【0072】 (2-6-4) Modification 4 In Embodiment 1, the correction processing unit 127 is provided between the first amplification circuit 122a and the A / D conversion circuit 123 as an example. However, the correction processing unit 127 may be provided inside the first amplification circuit 122a, or inside the A / D conversion circuit 123, or it may perform correction of the detection signal across the first amplification circuit 122a and the A / D conversion circuit 123. 【0073】 (2-6-5) Modification 5 In Embodiment 1, it is assumed that the first region W11 and the second region W12 of the detection region W1 are fixed and set in advance. However, the first region W11 and the second region W12 may be set automatically. In this case, for example, when the temperature sensor 1 is installed, the correction processing unit 127 initially detects the temperature of the entire detection region W1 using one of the correction information of the first correction information and the second correction information, and based on the detection result, sets the region of the detection region W1 within the first temperature range as the first region W11 and the region within the second temperature range as the second region W12. 【0074】 (Embodiment 2) The temperature sensor 1 according to Embodiment 2 will be described with reference to Figures 1 to 3. In the following description, components that are the same as those in Embodiment 1 will be denoted by the same reference numerals and their descriptions will be omitted, and the description will focus on components that differ from those in Embodiment 1. 【0075】(1) As shown in the configuration diagram 1, the temperature sensor 1 according to embodiment 2 comprises an infrared sensor 100, an infrared sensor 100, a thermistor 110, a processing circuit unit 120, and an infrared transmitting member 153, similar to the temperature sensor 1 according to embodiment 1. 【0076】 The temperature sensor 1 according to Embodiment 2 differs from the temperature sensor 1 according to Embodiment 1 in that the second temperature range includes the first temperature range, and the second correction information includes the first correction information and the third correction information. Embodiment 2 will be described in detail below. 【0077】 In Embodiment 2, as shown in Figure 3, the detection region W1 of the temperature sensor 1 has a first region W11 and a second region W12, similar to Embodiment 1. The first region W11 corresponds to a first temperature range, similar to Embodiment 1. The second region W12 corresponds to a second temperature range, similar to Embodiment 1. 【0078】 In Embodiment 2, the second temperature range includes the first temperature range (for example, the room temperature range (for example, a temperature range of 25°C to 50°C)). More specifically, the second temperature range includes the first temperature range and the third temperature range (for example, the high temperature range (for example, a temperature range of 50°C to 350°C)). The third temperature range is the temperature range within the second temperature range that exceeds the upper limit of the first temperature range. The upper limit of the second temperature range is the same as the upper limit of the third temperature range (i.e., outside the range of the first temperature range), and the lower limit of the second temperature range is the same as the lower limit of the first temperature range. Therefore, either the upper limit or the lower limit (upper limit) of the second temperature range is outside the range of the first temperature range. 【0079】 In Embodiment 1, it is assumed that the second temperature range of the second region W12 is always high temperature (i.e., the stove 52 is always in use). In Embodiment 2, it is assumed that the second region W12 includes both room temperature and high temperature ranges (i.e., both when the stove 52 is in use (high temperature) and when it is not in use (room temperature)). 【0080】In Embodiment 2, the second correction information includes first correction information and third correction information. That is, the second correction information is composed of first correction information and third correction information. The first correction information is correction information for performing correction processing on the first detection signal output from the first infrared detection element 21, which detects infrared radiation in a first temperature range, among a plurality of infrared detection elements 2a (see Figure 2). More specifically, it is information indicating the first amplification factor when amplifying the first detection signal. The third correction information is correction information corresponding to a third temperature range that exceeds the upper limit of the first temperature range. That is, the third correction information is correction information for performing correction processing on the detection signal output from the infrared detection element 2a, which detects infrared radiation in a third temperature range. More specifically, the third correction information is information indicating the third amplification factor when amplifying the detection signal output from the infrared detection element 2a, which detects infrared radiation in a third temperature range. 【0081】 In Embodiment 2, when the correction processing unit 127 corrects the first detection signal from the first infrared detection element 21 (see Figure 2) corresponding to the first region W11, it performs the same correction as in Embodiment 1. Therefore, the explanation of how to correct the first detection signal is omitted. 【0082】 In Embodiment 2, when the correction processing unit 127 corrects the second detection signal from the second infrared detection element 22 (see Figure 2) corresponding to the second region W12, it performs the first to third determinations described later, and based on the determination results of each of the first to third determinations, it changes the second correction information used in the correction processing to the first correction information or the third correction information, and corrects the second detection signal. 【0083】 The first determination is whether the temperature indicated by the temperature information of the second region W12 calculated by the calculation unit 124 is within the range of the first temperature range (i.e., whether the temperature is high or not). The second determination is whether the temperature of the second region W12 calculated by the calculation unit 124 exceeds the upper limit of the first temperature range (i.e., whether the temperature has changed from room temperature (when the stove 52 is not in use) to high temperature (when the stove 52 is in use)). The third determination is whether the temperature of the second region W12 calculated by the calculation unit 124 falls below the upper limit of the first temperature range (i.e., whether the temperature has changed from high temperature to room temperature). 【0084】(2) Referring to the operation diagram 10 of the correction processing unit, the operation of the correction processing unit 127 of the second embodiment when it corrects the second detection signal output from the second infrared detection element 22 corresponding to the second region W12 will be described. 【0085】 The correction processing unit 127 performs a first determination (step S1). If, as a result of the first determination, the temperature indicated by the temperature information of the second region W12 is within the first temperature range (i.e., the temperature of the second region W12 is at room temperature (when the stove 52 is not in use)) (Yes in step S1), the correction processing unit 127 selects the first correction information as the second correction information (step S2), and performs correction processing of the second detection signal using the selected first correction information (step S3). That is, the correction processing unit 127 amplifies the second detection signal using the first amplification factor specified in the first correction information. In other words, the correction processing unit 127 adjusts the gain of the second detection signal using the first correction information. Then the process returns to step S1. 【0086】 Furthermore, if the result of the first determination is that the temperature indicated by the temperature information of the second region W12 is not within the range of the first temperature range (No in step S1), the correction processing unit 127 performs a second determination (step S4). If the result of the second determination is that the temperature indicated by the temperature information of the second region W12 does not exceed the upper limit of the first temperature range (No in step S4), the correction processing unit 127 returns to step S1. On the other hand, if the result of the second determination is that the temperature indicated by the temperature information of the second region W12 exceeds the upper limit of the first temperature range (i.e., the temperature of the second region W12 changes from room temperature to high temperature (while the stove 52 is in use)) (Yes in step S4), the correction processing unit 127 changes the second correction information used in the correction process from the first correction information to the third correction information (step S5). Then, the correction processing unit 127 performs correction processing of the second detection signal using the third correction information (step S6). In other words, the correction processing unit 127 amplifies the second detection signal using the third amplification factor specified in the third correction information. That is, the correction processing unit 127 adjusts the gain of the second detection signal using the third correction information. 【0087】Then, the correction processing unit 127 performs a third determination (step S7). If, as a result of the third determination, the temperature indicated by the temperature information of the second region W12 is not below the upper limit of the first temperature range (No in step S7), the process returns to step S6. If, as a result of the third determination, the temperature indicated by the temperature information of the second region W12 is below the upper limit of the first temperature range (i.e., the temperature of the second region W12 has changed from high temperature to room temperature) (Yes in step S7), the correction processing unit 127 changes the second correction information used in the correction process from the third correction information to the first correction information (step S8). Then, the correction processing unit 127 performs correction processing on the second detection signal using the first correction information (step S9). That is, the correction processing unit 127 amplifies the second detection signal using the first amplification factor specified in the first correction information. That is, the correction processing unit 127 adjusts the gain of the second detection signal using the first correction information. Then, the process returns to step S1. 【0088】 (3) In the temperature sensor 1 according to the second embodiment, the second temperature range includes the first temperature range. The second correction information includes the first correction information and the third correction information. The third correction information corresponds to a temperature range that exceeds the upper limit of the first temperature range. The correction processing unit 127 performs correction processing using the first correction information as the second correction information when the temperature indicated by the temperature information of the second region W12 is within the range of the first temperature range. The correction processing unit 127 changes the second correction information used in the correction processing from the first correction information to the third correction information when the temperature indicated by the temperature information of the second region W12 exceeds the upper limit of the first temperature range. The correction processing unit 127 changes the second correction information used in the correction processing from the third correction information to the first correction information when the temperature indicated by the temperature information of the second region W12 falls below the upper limit of the first temperature range. 【0089】According to this configuration, when the second temperature range includes the first temperature range, the correction information used in the correction processing of the detection signal corresponding to the second region W12 is changed to either the first correction information or the third correction information, depending on whether the temperature indicated by the temperature information of the second region W12 is within the range of the first temperature range or exceeds the upper limit of the first temperature range. This ensures the detection temperature accuracy and detection temperature range in the second region W12 in both cases: when the temperature indicated by the temperature information of the second region W12 is within the range of the first temperature range or when it exceeds the upper limit of the first temperature range. 【0090】 (4) Modified embodiments 1 to 2 and their modified embodiments can be implemented in combination. 【0091】 (Embodiment 3) The temperature sensor 1 according to Embodiment 3 will be described with reference to Figures 1, 2, 8, and 9. In the following description, components that are the same as those in Modification 3 of Embodiment 1 will be denoted by the same reference numerals and their descriptions will be omitted, while the description will focus on components that differ from those in Modification 3 of Embodiment 1. 【0092】 (1) As shown in the configuration diagram 1, the temperature sensor 1 according to Embodiment 3 comprises an infrared sensor 100, an infrared sensor 100, a thermistor 110, a processing circuit unit 120, and an infrared transmitting member 153, similar to the temperature sensor 1 according to Modification 3 of Embodiment 1. 【0093】 The temperature sensor 1 according to Embodiment 3 differs from the temperature sensor 1 according to Modification 3 of Embodiment 1 in that the second temperature range includes the first temperature range, and the second correction information includes the first correction information and the fourth correction information. Embodiment 3 will be described in detail below. 【0094】 In Embodiment 3, as shown in Figure 9, the detection region W1 of the temperature sensor 1 has a first region W11 and a second region W12, similar to the case of Modification 3 of Embodiment 1. The first region W11 corresponds to a first temperature range, similar to the case of Modification 3 of Embodiment 1. The second region W12 corresponds to a second temperature range, similar to the case of Modification 3 of Embodiment 1. 【0095】In Embodiment 3, the second temperature range includes the first temperature range (for example, the room temperature range (for example, the temperature range of 25°C to 50°C)). More specifically, the second temperature range includes the first temperature range and the fourth temperature range (for example, the low temperature range (for example, the temperature range of -40°C to 25°C)). The third temperature range is the temperature range within the second temperature range that is below the lower limit of the first temperature range. The lower limit of the second temperature range is the same as the lower limit of the fourth temperature range (i.e., outside the range of the first temperature range), and the upper limit of the second temperature range is the same as the upper limit of the first temperature range. Therefore, either the upper limit or the lower limit (lower limit) of the second temperature range is outside the range of the first temperature range. 【0096】 In the third modification of Embodiment 1, it is assumed that the second temperature range of the second region W12 is always low (i.e., the freezer compartment 57e is always used as a freezer compartment). In Embodiment 2, it is assumed that the second region W12 includes both ambient temperature and low temperature ranges (i.e., the refrigerator compartment 57d is switched between being used as a freezer compartment corresponding to low temperature or a refrigerator compartment corresponding to ambient temperature). 【0097】 In Embodiment 3, the second correction information includes first correction information and fourth correction information. That is, the second correction information is composed of first correction information and fourth correction information. The first correction information is correction information for performing correction processing on the first detection signal output from the first infrared detection element 21 (see Figure 2) which detects infrared radiation in a first temperature range among a plurality of infrared detection elements 2a, and more specifically, it is information indicating the first amplification factor when amplifying the first detection signal. The fourth correction information is correction information corresponding to the fourth temperature range which is below the lower limit of the first temperature range. That is, the fourth correction information is correction information for performing correction processing on the detection signal output from the infrared detection element 2a which detects infrared radiation in a fourth temperature range. More specifically, the fourth correction information is information specifying the fourth amplification factor when amplifying the detection signal output from the infrared detection element 2a which detects infrared radiation in a fourth temperature range. 【0098】In Embodiment 3, when the correction processing unit 127 corrects the first detection signal from the first infrared detection element 21 (see Figure 2) corresponding to the first region W11, it performs the same correction as in Embodiment 1. Therefore, the explanation of how to correct the first detection signal is omitted. 【0099】 In Embodiment 3, when the correction processing unit 127 corrects the second detection signal from the second infrared detection element 22 (see Figure 2) corresponding to the second region W12, it performs the first to third determinations described later, and based on the determination results of each of the first to third determinations, it changes the second correction information used in the correction processing to the first correction information or the fourth correction information, and corrects the second detection signal. 【0100】 The first determination is whether the temperature indicated by the temperature information of the second region W12 calculated by the calculation unit 124 is within the range of the first temperature range (i.e., whether the temperature is high or low). The second determination is whether the temperature of the second region W12 calculated by the calculation unit 124 has fallen below the lower limit of the first temperature range (i.e., whether the temperature has changed from room temperature (refrigerated state of freezer compartment 57e) to low temperature (freezer state of freezer compartment 7e)). The third determination is whether the temperature of the second region W12 calculated by the calculation unit 124 has exceeded the lower limit of the first temperature range (i.e., whether the temperature has changed from low temperature to room temperature). 【0101】 (2) Referring to the operation diagram 11 of the correction processing unit, the operation of the correction processing unit 127 of Embodiment 3 when it corrects the second detection signal output from the second infrared detection element 22 corresponding to the second region W12 will be described. 【0102】The correction processing unit 127 performs a first determination (step S21). If, as a result of the first determination, the temperature indicated by the temperature information of the second region W12 is within the first temperature range (i.e., the temperature of the second region W12 is at room temperature (refrigerated state of the freezer 57e)) (Yes in step S1), the correction processing unit 127 selects the first correction information as the second correction information (step S22) and performs correction processing of the second detection signal using the selected first correction information (step S23). In other words, the correction processing unit 127 amplifies the second detection signal using the first amplification factor specified in the first correction information. In other words, the correction processing unit 127 adjusts the gain of the second detection signal using the first correction information. Then the process returns to step S21. 【0103】 Furthermore, if the result of the first determination is that the temperature indicated by the temperature information of the second region W12 is not within the range of the first temperature range (No in step S21), the correction processing unit 127 performs a second determination (step S24). If the result of the second determination is that the temperature indicated by the temperature information of the second region W12 is not below the lower limit of the first temperature range (No in step S24), the correction processing unit 127 returns to step S21. On the other hand, if the result of the second determination is that the temperature indicated by the temperature information of the second region W12 is below the lower limit of the first temperature range (i.e., the temperature of the second region W12 has changed from room temperature (refrigerated state of the freezer compartment 57e) to low temperature (freezer state of the freezer compartment 57e)) (Yes in step S24), the correction processing unit 127 changes the second correction information used in the correction process from the first correction information to the fourth correction information (step S25). Then, the correction processing unit 127 performs correction processing of the second detection signal using the fourth correction information (step S26). In other words, the correction processing unit 127 amplifies the second detection signal using the fourth amplification factor specified in the fourth correction information. That is, the correction processing unit 127 adjusts the gain of the second detection signal using the fourth correction information. 【0104】Then, the correction processing unit 127 performs a third determination (step S27). If, as a result of the third determination, the temperature indicated by the temperature information of the second region W12 does not exceed the lower limit of the first temperature range (No in step S27), the processing returns to step S26. If, as a result of the third determination, the temperature indicated by the temperature information of the second region W12 exceeds the lower limit of the first temperature range (i.e., the second region W12 changes from low temperature (freezer state of the freezer compartment 57e) to room temperature (refrigerated state of the freezer compartment 57e)) (Yes in step S27), the correction processing unit 127 changes the second correction information used in the correction processing from the third correction information to the first correction information (step S28). Then, the correction processing unit 127 performs correction processing of the second detection signal using the first correction information (step S29). That is, the correction processing unit 127 amplifies the second detection signal using the first amplification factor specified in the first correction information. In other words, the correction processing unit 127 adjusts the gain of the second detection signal using the first correction information. Then, the process returns to step S1. 【0105】 (3) In the temperature sensor 1 according to the third embodiment, the second temperature range includes the first temperature range. The second correction information includes the first correction information and the fourth correction information. The fourth correction information corresponds to the temperature range that falls below the lower limit of the first temperature range. The correction processing unit 127 performs correction processing using the first correction information as the second correction information when the temperature indicated by the temperature information of the second region W12 is within the range of the first temperature range. The correction processing unit 127 changes the second correction information used in the correction processing from the first correction information to the fourth correction information when the temperature indicated by the temperature information of the second region W12 falls below the lower limit of the first temperature range. The correction processing unit 127 changes the second correction information used in the correction processing from the fourth correction information to the first correction information when the temperature indicated by the temperature information of the second region W12 exceeds the upper limit of the first temperature range. 【0106】According to this configuration, when the second temperature range includes the first temperature range, the correction information used in the correction processing of the detection signal corresponding to the second region W12 is changed to either the first correction information or the fourth correction information depending on whether the temperature indicated by the temperature information of the second region W12 is within the first temperature range or below the lower limit of the first temperature range. This ensures the detection temperature accuracy and detection temperature range in the second region W12 in both cases where the temperature indicated by the temperature information of the second region W12 is within the first temperature range or below the lower limit of the first temperature range. 【0107】 (4) Modified embodiments 1 to 3 and their modified embodiments can be implemented in combination. 【0108】 (Summary) Based on the embodiments described above, the following embodiments are disclosed. 【0109】 The temperature sensor (1) of the first embodiment is a temperature sensor (1) having a detection region (W1). The detection region (W1) has a first region (W11) and a second region (W12). The first region (W11) corresponds to a first temperature range. The second region (W12) corresponds to a second temperature range. In the second temperature range, either the upper limit or the lower limit is outside the range of the first temperature range. The temperature sensor (1) comprises a plurality of infrared detection elements (2a) and a processing circuit unit (120). The plurality of infrared detection elements (2a) include a first infrared detection element (21) and a second infrared detection element (22). The first infrared detection element (21) detects infrared radiation (C1) in the first temperature range. The second infrared detection element (22) detects infrared radiation (C1) in the second temperature range. The processing circuit unit (120) generates a temperature information signal including temperature information of the detection region (W1) based on the detection signals output from each of the plurality of infrared detection elements (2a). The processing circuit unit (120) includes a correction processing unit (127) that performs correction processing on the detection signal. The correction processing unit (127) has first correction information and second correction information. The first correction information is correction information for performing correction processing on the detection signal output from the first infrared detection element (21). The second correction information is correction information for performing correction processing on the detection signal output from the second infrared detection element (22). 【0110】With this configuration, correction information (first correction information and second correction information) is set for each region (first region (W11) and second region (W12)) with different temperature ranges in the detection area (W1) of the temperature sensor (1). As a result, corrections can be made according to the temperature range for each region with different temperature ranges in the detection area (W1) of the temperature sensor (1), thereby ensuring the detection temperature range and detection temperature accuracy. 【0111】 In the temperature sensor (1) of the second embodiment, in the first embodiment, the second temperature range includes the first temperature range. The second correction information includes the first correction information and the third correction information. The third correction information corresponds to a temperature range that exceeds the upper limit of the first temperature range. The correction processing unit (127) performs correction processing using the first correction information as the second correction information if the temperature indicated by the temperature information of the second region (W12) is within the range of the first temperature range. The correction processing unit (127) changes the second correction information used in the correction processing from the first correction information to the third correction information if the temperature indicated by the temperature information of the second region (W12) exceeds the upper limit of the first temperature range. The correction processing unit (127) changes the second correction information used in the correction processing from the third correction information to the first correction information if the temperature indicated by the temperature information of the second region (W12) falls below the upper limit of the first temperature range. 【0112】 With this configuration, the detection temperature accuracy and detection temperature range in the second region (W12) can be ensured in both cases: when the temperature indicated by the temperature information in the second region (W12) is within the first temperature range or when it exceeds the upper limit of the first temperature range. 【0113】In the temperature sensor (1) of the third embodiment, in the first embodiment, the second temperature range includes the first temperature range. The second correction information includes the first correction information and the fourth correction information. The fourth correction information corresponds to the temperature range that falls below the lower limit of the first temperature range. The correction processing unit (127) performs correction processing using the first correction information as the second correction information if the temperature indicated by the temperature information of the second region (W12) is within the range of the first temperature range. The correction processing unit (127) changes the second correction information used in the correction processing from the first correction information to the fourth correction information if the temperature indicated by the temperature information of the second region (W12) falls below the lower limit of the first temperature range. The correction processing unit (127) changes the second correction information used in the correction processing from the fourth correction information to the first correction information if the temperature indicated by the temperature information of the second region (W12) exceeds the upper limit of the first temperature range. 【0114】 With this configuration, the detection temperature accuracy and detection temperature range in the second region (W12) can be ensured in both cases: when the temperature indicated by the temperature information in the second region (W12) is within the first temperature range or when it falls below the lower limit of the first temperature range. 【0115】 In the temperature sensor (1) of the fourth embodiment, in any one of the first to third embodiments, the correction processing unit (127) performs gain adjustment on the detection signal output from the first infrared detection element (21) using first correction information. The correction processing unit (127) also performs gain adjustment on the detection signal output from the second infrared detection element (22) using second correction information. 【0116】 With this configuration, gain adjustment is performed by changing the correction information in the first region (W11) and the second region (W12). This ensures the detection temperature accuracy and detection temperature range in the first region (W11) and the second region (W12), respectively. 【0117】 In the fifth embodiment of the temperature sensor (1), in any one of the first to fourth embodiments, the temperature sensor (1) is installed on the wall (50) or range hood (54) of the kitchen (59; 60). The second region (W12) is the region including the stove (52; 55) installed on the stovetop (51; 53) of the kitchen (59; 60). The first region (W11) is the region not including the stove (52; 55). 【0118】 With this configuration, when the temperature sensor (1) is installed in the kitchen (59; 60), the detection temperature accuracy and detection temperature range can be ensured in both the first region (W11) of the detection area (W1) of the temperature sensor (1) that does not include the stove (52; 55), and the second region (W12) that includes the stove (52; 55) in the kitchen (59; 60). 【0119】 In the sixth embodiment of the temperature sensor (1), in any one of the first to fourth embodiments, the temperature sensor (1) is installed on the back surface (58a) of the door (58) of the refrigerator (56). The refrigerator (56) has a freezer compartment (57e) and a refrigerator compartment (57d) separated by a partition (57c). The door (58) is a door that opens and closes both the freezer compartment (57e) and the refrigerator compartment (57d). The first area (W11) is the area including the refrigerator compartment (57d). The second area (W12) is the area including the freezer compartment (57e). 【0120】 With this configuration, when the temperature sensor (1) is installed in the refrigerator (56), the detection temperature accuracy and detection temperature range can be ensured in both the first region (W11) including the refrigerator compartment (57d) of the refrigerator (56) and the second region (W12) including the freezer compartment (57e) of the refrigerator (56) within the detection area (W1) of the temperature sensor (1). 【0121】 1 Temperature sensor 2a Infrared detection element 21 First infrared detection element 22 Second infrared detection element 51, 53 Cooktop base 52, 55 Cooktop 54 Range hood 56 Refrigerator 57d Refrigerator compartment 57e Freezer compartment 58 Door 58a Back side 59, 60 Kitchen 120 Processing circuit section 127 Correction processing section W1 Detection area W11 First area W12 Second area C1 Infrared

Claims

1. A temperature sensor having a detection area including a first area corresponding to a first temperature range and a second area corresponding to a second temperature range where either the upper limit or lower limit is outside the range of the first temperature range, comprising: a plurality of infrared detection elements including a first infrared detection element for detecting infrared radiation in the first temperature range and a second infrared detection element for detecting infrared radiation in the second temperature range; and a processing circuit unit that generates a temperature information signal including temperature information of the detection area based on detection signals output from each of the plurality of infrared detection elements, wherein the processing circuit unit includes a correction processing unit that performs correction processing of the detection signal, and the correction processing unit comprises: first correction information for performing the correction processing on the detection signal output from the first infrared detection element and second correction information for performing the correction processing on the detection signal output from the second infrared detection element.

2. The temperature sensor according to claim 1, wherein the second temperature range includes the first temperature range, the second correction information includes the first correction information and a third correction information corresponding to a temperature range exceeding the upper limit of the first temperature range, the correction processing unit performs the correction processing using the first correction information as the second correction information when the temperature indicated by the temperature information of the second region is within the range of the first temperature range, changes the second correction information used in the correction processing from the first correction information to the third correction information when the temperature indicated by the temperature information of the second region exceeds the upper limit of the first temperature range, and changes the second correction information used in the correction processing from the third correction information to the first correction information when the temperature indicated by the temperature information of the second region falls below the upper limit of the first temperature range.

3. The temperature sensor according to claim 1, wherein the second temperature range includes the first temperature range, the second correction information includes the first correction information and a fourth correction information corresponding to a temperature range below the lower limit of the first temperature range, the correction processing unit performs the correction processing using the first correction information as the second correction information when the temperature indicated by the temperature information of the second region is within the range of the first temperature range, changes the second correction information used in the correction processing from the first correction information to the fourth correction information when the temperature indicated by the temperature information of the second region falls below the lower limit of the first temperature range, and changes the second correction information used in the correction processing from the fourth correction information to the first correction information when the temperature indicated by the temperature information of the second region exceeds the upper limit of the first temperature range.

4. The temperature sensor according to any one of claims 1 to 3, wherein the correction processing unit performs gain adjustment on the detection signal output from the first infrared detection element using the first correction information, and performs gain adjustment on the detection signal output from the second infrared detection element using the second correction information.

5. The temperature sensor according to any one of claims 1 to 4, wherein the temperature sensor is installed on the wall of a kitchen or on a range hood, the second region is a region including a stove installed on the kitchen counter, and the first region is a region not including the stove.

6. The temperature sensor according to any one of claims 1 to 4, wherein the temperature sensor is installed on the back of the door of a refrigerator, the refrigerator has a freezer compartment and a refrigerator compartment separated by a partition, the door is a door that opens and closes both the freezer compartment and the refrigerator compartment, the first region is a region including the refrigerator compartment, and the second region is a region including the freezer compartment.

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