JP3733846B2 - Correction system control method, thermometer and correction device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a correction system control method, a thermometer, and a correction apparatus.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a thermometer using an infrared detection element is known which includes a so-called infrared sensor that detects (senses) infrared light emitted from a measurement object and converts it into an electrical signal. In general, this type of infrared sensor uses the Seebeck effect of a thermocouple (thermocouple) or a thermopile (thermopile) in which multiple thermocouples are connected in series to detect temperature changes due to infrared radiation absorption as thermoelectromotive force ( Thermopile type that measures temperature), pyroelectric type that detects changes in floating charge due to polarization according to infrared thermal energy in a base material made of ceramic, etc. (using the pyroelectric effect), and metal and other thin films And a bolometer that detects a change in resistance value due to heat of a temperature-sensitive resistor formed by an ultrafine wire (utilizing a change in resistance) is known.
[0003]
[Problems to be solved by the invention]
By the way, in a thermometer equipped with such an infrared sensor, when performing correction (inputting a correction value for correcting individual manufacturing error), two standard temperatures are measured and the result is obtained. The correction value obtained on the basis of the calculation of the thermopile fourth power equation is input by using a contact-type terminal. For this purpose, it is necessary to provide a dedicated terminal on the board for inputting the correction value. However, this method has a problem that the board area increases and the cost of parts increases. Further, since the correction in the state of the finished product cannot be performed, complicated processes such as interior board assembly, correction, exterior assembly, and final inspection must be performed, and the manufacturing process is complicated.
[0004]
On the other hand, if the correction is performed in the completed state in order to simplify the manufacturing process, the input terminal for the correction value is exposed, or an opening for directly inputting the correction value to the terminal on the board on the main body case. However, in any case, the number of parts is increased. In particular, in the latter case, there is a problem that the waterproofness is impaired and dust enters.
[0005]
The present invention provides a control method of a correction system, a thermometer, and a correction device that can simplify a manufacturing process by inputting a correction value without using a contact-type terminal. Objective.
[0006]
[Means for Solving the Problems]
The control method of the correction system of the present invention includes an infrared detection element, a thermometer that measures the temperature of the measurement object based on the detection result of the infrared detection element, and a correction device that includes an infrared output means. And a correction system control method for correcting individual manufacturing errors of the thermometer by providing a correction value from the correction device to the thermometer, wherein the first infrared ray emitted from the standard black body is A step of receiving light by the infrared detection element and outputting a measurement value based on the detection result, and inputting the output measurement value to the correction device, calculating a correction value based on the measurement value, and calculating the correction value A step of outputting a second infrared ray corresponding to the step, a step of receiving the outputted second infrared ray by an infrared detection element, and storing a correction value based on the detection result for correction of the measurement value; Characterized in that it run.
The thermometer of the present invention is corrected by the correction system described above.
The correction device of the present invention is used in the above correction system.
[0007]
The thermometer includes an infrared detection element that detects the temperature by receiving infrared radiation emitted from the measurement object, and the thermometer is based on an output value from the infrared detection element and a correction value input from the outside. In the thermometer for determining the temperature of the measurement object, mode switching means for switching between a temperature measurement mode for performing temperature measurement and a correction mode for inputting the correction value, and the correction in the correction mode A light receiving means for receiving the infrared output corresponding to the value by the infrared detection element, a storage means for storing the correction value received by the light receiving means, and the temperature detection mode, from the infrared detection element by the correction value. Correction means for correcting the output value.
This thermometer includes mode switching means for switching between a temperature measurement mode for performing temperature measurement and a correction mode for inputting a correction value (for correcting an individual manufacturing error). Therefore, the correction value can be easily input by simply switching the mode, and accurate temperature measurement can always be performed if this is performed periodically. In addition, since the infrared output corresponding to the correction value is received by the infrared detection element, the correction value can be input without contact. Therefore, it is not necessary to form a terminal dedicated to input correction values on the substrate in the thermometer, and correction can be performed on the finished product without exposing the input terminal for correction values as in the prior art. Thereby, since the number of parts can be reduced, cost reduction can be achieved. In addition, in the past, there was a method of forming an opening for inputting a correction value directly from the outside in order to input a correction value in a completed body. Intrusion into the thermometer can be prevented. In the temperature measurement mode, the output value from the infrared detection element is corrected based on the stored correction value to determine the temperature of the object to be measured. Therefore, individual manufacturing errors can be corrected, and high-precision measurement is possible. The temperature can be done.
In the above thermometer, the light receiving means may receive an infrared output corresponding to the correction value expressed by blinking light.
Since this thermometer receives an infrared output corresponding to a correction value expressed by blinking light such as a filament lamp, the correction value can be recognized from the received infrared output. That is, the correction value emitted by simple pulse control can be accurately received.
In addition, as a correction method of the thermometer, an infrared detection element that detects the temperature by receiving infrared rays emitted from the measurement object is provided, and an output value from the infrared detection element and a correction value input from the outside are provided. In the thermometer correction method for determining the temperature of the object to be measured based on the infrared sensor, the infrared detector corresponding to the correction value is received by the infrared detector in the thermometer as a completed body set in the correction mode. A light receiving step and a storing step for storing the received correction value may be provided.
According to this configuration, since a correction value can be input to the thermometer as a complete body, it is not a complicated process such as interior board assembly, correction, exterior assembly, and final inspection, but interior board assembly, exterior assembly, correction, etc. The process can be simplified. In addition, since the infrared output corresponding to the correction value is received by the infrared detection element, the correction value can be input without contact. Therefore, it is not necessary to form a terminal dedicated to input correction values on the substrate in the thermometer, and correction can be performed on the finished product without exposing the input terminal for correction values as in the prior art. Thereby, since the number of parts can be reduced, cost reduction can be achieved. In addition, in the past, there was a method of forming an opening for inputting a correction value directly from the outside in order to input a correction value in a completed body. Intrusion into the thermometer can be prevented. In addition, since the received correction value is stored, manufacturing errors for each individual can be corrected during temperature measurement, and highly accurate temperature measurement can be performed.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a control method, a thermometer, and a correction device of a correction system according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the present embodiment, an ear thermometer will be described as an example of a thermometer using an infrared detection element.
[0013]
As shown in FIGS. 1 and 3, the ear thermometer 1 receives the infrared rays from the measurement object S with the main body case 11 and the specimen (ear) as the measurement object S, and the temperature ( An infrared light reception detection unit 2 that extracts an electrical signal (voltage) according to body temperature (tympanic temperature), a temperature measurement value determination unit 4 that determines the temperature of the measurement object S based on the output voltage of the infrared light reception detection unit 2, and The LCD unit 5 includes an LCD panel 51 for displaying temperature measurement values and the like, and the power source unit 6 that includes a power switch SW6 and supplies power to each unit.
[0014]
The infrared light reception detection unit 2 includes an infrared detection element 21 using an infrared sensor. As described above, the infrared sensor includes a pyroelectric sensor that uses the pyroelectric effect and a bolometer that uses a resistance change. However, the ear thermometer 1 has a thermopile (in order to reduce size and cost). Thermopile type using the Seebeck effect of thermoelectric stack).
[0015]
The temperature measurement value determination unit 4 includes a temperature measurement switch SW4 and amplifies a voltage signal corresponding to the body temperature (tympanic temperature) output from the infrared light reception detection unit 2 as directly related to temperature (body temperature) detection. An amplifier 41, an A / D converter 42 for A / D converting the output, a CPU 44 for numerically processing the output value to determine a temperature measurement value, and displaying it on the LCD panel 51 of the LCD unit 5; A RAM 45 serving as a processing work area and an EEPROM 43 in which correction values for correction are written are provided. Note that the CPU 44 may be provided with various buffers for storing values required in the course of arithmetic processing. These buffers may be used in place of the RAM 45.
[0016]
The infrared light receiving detection unit 2 includes a cold junction temperature sensing element (thermistor, PN diode, etc.) 73, and the temperature measurement value determination unit 4 amplifies the output of the cold junction temperature sensing element 73. And an A / D converter 72 for A / D converting the output. As a logical block, the cold junction temperature detector 73, the amplifier 71, and the A / D converter 72 constitute the cold junction temperature detector 7. CPU44 inputs the detection result detected by the cold junction temperature detection part 7, and determines a temperature measurement value based on it.
[0017]
Next, a correction device 101 that calculates a correction value for correcting a manufacturing error of the ear thermometer 1 and emits infrared rays corresponding to the correction value will be described. As shown in FIGS. 2 and 3, the correction device 101 includes a main body case 120, a measured value input unit 103 for reading measured values displayed on the LCD unit 5 of the ear thermometer 1 by image recognition, a measured value An arithmetic processing unit 104 that calculates a correction value based on an output of the input unit 103, a correction value output unit 105 that emits the correction value calculated by the arithmetic processing unit 104 as an infrared output, and a power switch SW8 are provided. And a power supply unit 102 that supplies power to each unit.
[0018]
The measurement value input unit 103 includes a camera 107 for reading the measurement value displayed on the LCD unit 5. The arithmetic processing unit 104 also includes an amplifier 108 that amplifies the measurement value signal read by the camera 107, an A / D converter 109 that performs A / D conversion of the output, a ROM 110 that stores a control program, and the like. The CPU 111 performs control processing in accordance with the control program, and the RAM 112 is a work area for various processes in the CPU 44.
[0019]
In the CPU 111, a predetermined calculation process is performed based on the measurement value read by the camera 107, and a correction value is calculated. Note that the CPU 111 may be provided with various buffers for storing values required in the course of arithmetic processing. These buffers may be used instead of the RAM 112. The correction value calculated by the CPU 111 is converted into a correction value signal and then sent to the correction value output unit 105.
[0020]
The correction value output unit 105 includes a digital signal terminal 113 to which a correction value signal is supplied, a filament lamp 114 capable of controlling the irradiation time and irradiation interval by adjusting the amount of current passing through the filament by a transistor or the like, and a filament lamp The lamp irradiation switch SW10 for operating 114 is radiated, and the correction value calculated by the CPU 111 is emitted as infrared rays by the blinking of the filament lamp 114.
[0021]
The correction device 101 does not necessarily have to include the measurement value input unit 103 and the correction value output unit 105 as a unit. For example, instead of the measurement value input unit 103, the user may visually recognize the measurement value displayed on the LCD unit 5 of the ear thermometer 1 and input it to the correction device 101, or instead of the correction device 101. Alternatively, the correction value may be calculated using a calculator or the like. Alternatively, a lamp connectable to a correction device (calculator) may be prepared as a separate device, and a signal obtained by digitizing the calculated correction value (by the arithmetic processing unit) may be sent to the lamp.
[0022]
Here, a correction method using the correction device 101 of the ear thermometer 1 will be described. First, the user sets the correction mode by pressing the power switch SW6 and the temperature measurement switch SW4 of the ear thermometer 1 at the same time. Then, the temperature measurement switch SW4 is pressed to measure standard black bodies (black body furnaces) of 32 (° C.) and 42 (° C.), and infrared rays emitted from the respective standard black bodies are received by the infrared detection element 21. To do. Then, the detection results (output voltage V and measurement temperature T) of these infrared detection elements 21 are displayed on the LCD panel 51.
[0023]
Next, the user causes the camera of the correction device 101 to recognize an image of the detection result (output voltage V and measurement temperature T) displayed on the LCD panel 51. The correction device 101 sends the recognized image signal to the CPU 111 via the amplifier 108 and the A / D converter 109. Then, the CPU 111 calculates a correction value (proportional constant A and reference temperature Ti) for correcting a manufacturing error of the ear thermometer by a thermopile fourth power equation (FIG. 4 (Equation 1)). The calculated correction value (proportional constant A and reference temperature Ti) is converted into a correction value signal expressed in hexadecimal (expressed as 1 and 0, see FIG. 5 (a-example)), and then digitally converted. The signal is supplied to the signal terminal 113.
[0024]
Next, the user points the filament lamp 114 of the correction device 101 toward the infrared light receiving unit 2 of the ear thermometer 1 and presses the lamp irradiation switch SW10. Then, the filament lamp 114 blinks (repeats ON and OFF) based on the correction value signal supplied to the digital signal terminal 113, and infrared rays are radiated accordingly (see FIG. 5A).
[0025]
The correction value signal (see FIG. 5B) received by the infrared detecting element 21 of the ear thermometer 1 is amplified by the amplifier 41 and then a predetermined period (here, 100 mSEC) by the A / D converter 42. ) (See FIG. 5 (b-example)). The sampling result is input to the CPU 44, numerically processed, and stored in the EEPROM 43. Then, the stored correction value is displayed on the LCD panel 51, and the correction ends. Finally, when the user presses the power switch SW4, the power is turned off.
[0026]
Next, a case where normal temperature measurement is performed after correction by the above-described method will be described. The user presses only the power switch SW6 of the ear thermometer 1 to set the temperature measuring mode, and then presses the temperature measuring switch SW4 to measure the temperature of the measurement object (ear eardrum) S. The ear-type thermometer 1 receives infrared rays radiated from the measuring object S by the infrared detection element 21, and the detection results (thermopile output voltage V) of the infrared detection element 21 and the cold junction temperature sensing element 73 are the amplifier 41. And sent to the CPU 44 via the AD converter 42. Then, the CPU 44 determines the temperature T of the measuring object S based on the output voltage V of the thermopile 85 and the correction value (proportional constant A and reference temperature Ti) stored in the EEPROM 43 (see FIG. 4 (Equation 2)). . The temperature of the measuring object S determined by the CPU 44 is displayed on the LCD panel 51, and the user visually recognizes the temperature and confirms the temperature of the measuring object S.
[0027]
As described above, according to the thermometer and the correction method thereof of the present invention, a temperature measurement mode for performing temperature measurement and a correction value (for correcting individual manufacturing errors) are input. Mode switching means for switching to the correction mode is provided. Therefore, the correction value can be easily input by simply switching the mode, and accurate temperature measurement can always be performed if this is performed periodically.
[0028]
Further, since the infrared detection element 21 receives the infrared output corresponding to the correction value, the correction value can be input without contact. Therefore, it is not necessary to form a terminal dedicated to input correction values on the substrate in the thermometer, and correction can be performed on the finished product without exposing the input terminal for correction values as in the prior art. Thereby, since the number of parts can be reduced, cost reduction can be achieved. In addition, since correction values can be input to the thermometer as a finished product, it is not a complicated process such as interior board assembly, correction, exterior assembly, and final inspection, but simplified processes such as interior board assembly, exterior assembly, and correction. can do.
[0029]
In addition, in the past, there was a method of forming an opening for inputting a correction value directly from the outside in order to input a correction value in a completed body. Intrusion into the thermometer can be prevented. In the temperature measurement mode, the output value from the infrared detecting element 21 is corrected by the stored correction value to determine the temperature of the measuring object S. Therefore, the individual manufacturing error can be corrected, and high accuracy is achieved. Temperature measurement can be performed.
[0030]
Further, since the infrared output corresponding to the correction value expressed by blinking light of the filament lamp 114 or the like is received, the correction value can be recognized from the received infrared output. That is, the correction value emitted by simple pulse control can be accurately received.
[0031]
In the above-described embodiment, an example of the ear-type thermometer 1 has been described. However, as long as the temperature of the measurement object S is measured using infrared radiation from the measurement object, another type of thermometer is used. It can be used not only for thermometers but also for other types of thermometers, and it can be used for various controls using the measured (detected) temperature without displaying the measured temperature value. Other applications are possible. Moreover, when using for these, it can change suitably in the range which does not deviate from the summary of this invention.
[0032]
【The invention's effect】
As described above, according to the control method, the thermometer, and the correction device of the correction system of the present invention, it is possible to input a correction value without using a contact-type terminal in a completed body. is there.
[Brief description of the drawings]
FIG. 1 is a block diagram of a temperature measuring system of an ear thermometer.
FIG. 2 is a block diagram of a correction device.
FIG. 3 is a schematic explanatory diagram of an ear thermometer and a correction device.
FIG. 4 is an explanatory diagram showing a fourth power equation of a thermopile.
FIG. 5 is an explanatory diagram showing an example of the output of a filament lamp and the detection result of an ear thermometer.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Ear-type thermometer 2 Infrared light reception detection part 4 Measurement value determination part 21 Infrared detection element 43 EEPROM
44 CPU
85 Thermopile 101 Correction device 103 Measurement value input unit 104 Operation processing unit 105 Correction value output unit 107 Camera 110 ROM
111 CPU
114 Filament lamp S Object to be measured

Claims (3)

A thermometer having an infrared detection element and measuring the temperature of the object to be measured based on the detection result of the infrared detection element; and a correction device having an infrared output means; from the correction device to the thermometer A correction system control method for correcting individual manufacturing errors of the thermometer by providing a correction value to the thermometer,
Receiving the first infrared ray emitted from the standard black body by the infrared detection element and outputting a measurement value based on the detection result;
Inputting the output measurement value to the correction device, calculating the correction value based on the measurement value, and outputting a second infrared ray corresponding to the calculated correction value;
Receiving the output second infrared ray by the infrared detection element, and storing the correction value based on the detection result for the correction of the measurement value. How to control the system.   A thermometer corrected by the control method of the correction system according to claim 1.   The correction apparatus used for the control method of the correction system of Claim 1.

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