JP2006226781A - Radiation thermometer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radiation thermometer enabling a user to know a measuring spot and a measuring timing. <P>SOLUTION: A head part 100A receives an infrared ray radiated from a measuring object W or a belt conveyor BR, and calculates a measured temperature value. An external signal is inputted into a body part 100B. Changeover of the ON/OFF state of the external signal is synchronized with conveyance of the measuring object W by the belt conveyor BR, and the ON state is acquired at a timing when the measuring object W is positioned just under the head part 100A, and the OFF state is acquired at a timing when the measuring object W is not positioned just under the head part 100A, When the external signal is put in the ON state, the body part 100B commands lighting of laser diodes 60, 70 to the head part 100A. When the external signal is put in the OFF state, the body part 100B commands putting-out of light of the laser diodes 60, 70 to the head part 100A. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a radiation thermometer that measures the temperature of an object by detecting infrared energy emitted from the object.

  Conventionally, the infrared temperature emitted from the measurement object is detected, the actual temperature of the measurement object is measured by correcting the infrared energy with the emissivity of the measurement object, and the temperature value is displayed. There is a total (for example, refer to Patent Document 1).

  In such a radiation thermometer, since the infrared energy radiated from the measurement object is not visible, the user cannot recognize which part of the measurement object is being measured.

Therefore, radiation thermometers have been developed that can indicate a measurement location using a light source such as a laser diode (LD) or a light emitting diode (LED) so that the user can recognize the measurement location.
Japanese Patent Laid-Open No. 7-324981

  However, in the radiation thermometer that can indicate the measurement location as described above, the measurement location is always instructed by the light source while the power is on. It is not possible to recognize whether the temperature is measured. Therefore, the user cannot know whether or not the temperature at the location indicated by the light source is accurately measured.

  By the way, a radiation thermometer for determining an abnormality in the temperature of a measurement object has been developed. In this radiation thermometer, when the temperature of the measurement object is higher or lower than a predetermined temperature, normal / abnormal temperature is displayed as a determination result.

  In a radiation thermometer having such a function and capable of designating a measurement location, the measurement location and the radiation thermometer are generally present at locations apart from each other. In this case, the user can recognize the measurement location by the instruction of the light source, but cannot see the measurement location and the determination result displayed on the radiation thermometer at the same time. As a result, if the user confirms the measurement location after confirming the determination result, or confirms the determination result after confirming the measurement location, the user may not be able to accurately know the determination result of the actual measurement location.

  An object of the present invention is to provide a radiation thermometer that allows a user to know a measurement location and measurement timing.

  Another object of the present invention is to provide a radiation thermometer that allows the user to accurately know the determination result of the temperature of the measurement object and the actual measurement location.

  A radiation thermometer according to a first invention is a radiation thermometer that measures the temperature of a measurement object, based on an infrared detection means that detects infrared energy from the measurement object, and an output signal of the infrared detection means. A calculation means for calculating the temperature of the measurement object, a light source for emitting light to the measurement object, and a control means for controlling the lighting state of the light source based on an external signal indicating the measurement timing of the measurement object It is.

  In the radiation thermometer, infrared energy from the measurement object is detected by the infrared detection means, and the temperature of the measurement object is calculated by the calculation means. Here, the control means controls the lighting state of the light source based on an external signal indicating the measurement timing of the measurement object. Thereby, light is emitted from the light source to the measurement object at the timing when the temperature of the measurement object is calculated, and the measurement location is indicated. Thereby, the user can easily know the measurement location and measurement timing of the measurement object.

  You may further provide the determination means which determines whether the temperature calculated by the calculating means satisfy | fills predetermined conditions, and the output means which outputs the determination result of a determination means. In this case, the determination means determines whether or not the temperature of the measurement object calculated by the calculation means satisfies a predetermined condition, and the determination result is output by the output means. Thereby, the user can easily know whether or not the temperature of the measurement object satisfies a predetermined condition.

  A radiation thermometer according to a second invention is a radiation thermometer for measuring the temperature of a measurement object, based on an infrared detection means for detecting infrared energy from the measurement object and an output signal of the infrared detection means. A calculation means for calculating the temperature of the measurement object; a light source for emitting light to the measurement object; a determination means for determining whether or not the temperature of the measurement object calculated by the calculation means satisfies a predetermined condition; Control means for controlling the lighting state of the light source based on the determination result of the determination means.

  In the radiation thermometer, infrared energy from the measurement object is detected by the infrared detection means, and the temperature of the measurement object is calculated by the calculation means. Then, the determination means determines whether or not the temperature of the measurement object calculated by the calculation means satisfies a predetermined condition. Therefore, the control unit controls the lighting state of the light source based on the determination result of the determination unit. Thereby, the lighting state of the light source changes depending on whether or not the temperature of the measurement object calculated by the calculation means satisfies a predetermined condition. Thereby, since the indication state by the light source of the measurement location changes, the user can easily and accurately know the determination result whether the temperature of the measurement object satisfies the predetermined condition and the actual measurement location. .

  The determination means determines whether the temperature of the measurement object calculated by the calculation means satisfies a predetermined condition based on the temperature of the measurement object calculated by the calculation means and a preset temperature threshold value. You may judge. In this case, whether or not the calculated temperature of the measurement object satisfies a predetermined condition is determined by the determination unit based on the threshold value. Thereby, the user can easily set the predetermined condition of the temperature of the measurement object by the threshold value.

  The threshold value includes a plurality of different threshold values, and the determination means determines whether the temperature of the measurement object calculated by the calculation means based on the plurality of threshold values satisfies each of the plurality of conditions. The control unit may determine and control the lighting state of the light source in a plurality of modes based on the determination result of the determination unit.

  In this case, the determination unit determines whether or not the temperature of the measurement object calculated by the calculation unit satisfies each of the plurality of conditions based on the plurality of threshold values. Thereby, the user can easily set a plurality of conditions of the temperature of the measurement object with a plurality of threshold values.

  In addition, since the lighting state of the light source is controlled in a plurality of modes based on the determination result of the determining unit by the control unit, the user can set the temperature of the measurement object on the plurality of conditions based on the lighting state of the light source. It is possible to easily and accurately know the determination result of whether or not the condition is satisfied and the actual measurement location.

  You may further provide the output means which outputs the determination result of a determination means. In this case, the determination result is output by the output means. Thereby, the user can easily know whether or not the temperature of the measurement object satisfies a predetermined condition.

  According to the radiation thermometer according to the present invention, light is emitted from the light source to the measurement object at the timing when the temperature of the measurement object is calculated, and the measurement location is indicated. Thereby, the user can easily know the measurement location and measurement timing of the measurement object.

  Further, the lighting state of the light source changes depending on whether or not the temperature of the measurement object calculated by the calculation means satisfies a predetermined condition. Thereby, since the indication state by the light source of the measurement location changes, the user can easily and accurately know the determination result whether the temperature of the measurement object satisfies the predetermined condition and the actual measurement location. .

  Hereinafter, a radiation thermometer according to an embodiment of the present invention will be described with reference to FIGS.

(First embodiment)
FIG. 1 is a block diagram of a radiation thermometer according to the first embodiment. As shown in FIG. 1, a radiation thermometer 100 according to the present embodiment includes a head portion 100A and a main body portion 100B.

  The head portion 100A and the main body portion 100B are connected to each other by a cable 80. The main body 100B is connected to an external device (not shown) via cables 81 and 82.

  2 is a block diagram of the head portion 100A of FIG. 1, and FIG. 3 is a block diagram of the main body portion 100B of FIG.

  As shown in FIG. 1, the head unit 100A includes a thermopile 10, a preamplifier substrate 20, a main substrate 30, a power supply substrate 40, and two laser diodes 60 and 70.

  The thermopile 10 includes an infrared light receiving unit 11 and a thermistor 12. A first signal amplifying unit 21 and a second signal amplifying unit 22 are mounted on the preamplifier substrate 20. The main board 30 includes a third signal amplifying unit 31, analog-digital conversion circuits (hereinafter abbreviated as AD conversion circuits) 32, 33, a CPU (central processing unit) 34, a storage unit 35, an indicator lamp 36, and A laser drive circuit 37 is mounted.

  A power supply circuit 41, a communication circuit 42, and a laser drive circuit 43 are mounted on the power supply board 40. A cable 80 including a power supply line and a signal line is connected to the power supply board 40.

  In the thermopile 10, the infrared light receiving unit 11 detects infrared energy emitted from the measurement object. The thermistor 12 detects the internal temperature of the thermopile 10.

  In the preamplifier substrate 20, the first signal amplifier 21 amplifies the output signal of the infrared light receiver 11. The second signal amplifier 22 amplifies the output signal of the thermistor 12.

  In the main substrate 30, the third signal amplification unit 31 amplifies the output signal of the first signal amplification unit 21. The AD conversion circuit 32 converts the output signal of the third signal amplifying unit 31 into a digital signal, and provides the digital signal to the CPU 34 as the detected temperature value of the measurement object.

  The AD conversion circuit 33 converts the output signal of the second signal amplifying unit 22 into a digital signal, and provides the digital signal to the CPU 34 as the internal temperature value of the thermopile 10.

  The storage unit 35 stores information related to the thermopile 10 and arithmetic expressions for the CPU 34 to calculate the temperature of the measurement object. The information regarding the thermopile 10 includes, for example, the gain and offset value of the infrared light receiving unit 11, the gain and offset value of the thermistor 12, and the measured temperature range of the thermopile.

  The CPU 34 is supplied with the emissivity of the measurement object, a determination signal (to be described later), and a laser command signal from the main body 100B through the cable 80 and the communication circuit 42. The CPU 34 converts the detected temperature value given from the AD conversion circuit 32, the internal temperature value given from the AD conversion circuit 33, the emissivity given from the main unit 100B, and various information and arithmetic expressions stored in the storage unit 35. Based on this, an actual temperature value of the measurement object (hereinafter referred to as a measured temperature value) is calculated. Then, the CPU 34 gives the measured temperature value to the main body 100 </ b> B through the communication circuit 42 and the cable 80.

  Further, the CPU 34 feedback-controls the gain of the third signal amplifying unit 31 based on the level of the output signal of the AD conversion circuit 32.

  Further, the CPU 34 controls operations of the indicator lamp 36, the laser drive circuit 37, and the laser drive circuit 43 of the power supply substrate 40. The indicator lamp 36 displays an on state or an off state of a determination signal, which will be described later, by turning on or off under the control of the CPU 34. The laser drive circuit 37 drives the laser diode 60 under the control of the CPU 34.

  In the power supply board 40, the power supply circuit 41 supplies power supplied from the main body 100B through the cable 80 to each component of the head 100A.

  The communication circuit 42 and the laser drive circuit 43 are connected to the CPU 34 of the main board 30.

  As described above, the communication circuit 42 performs communication between the CPU 34 and the main body 100B via the cable 80. The laser drive circuit 43 drives the laser diode 70 under the control of the CPU 34. Laser light emitted from the laser diodes 60 and 70 is applied to the measurement location of the measurement object.

  As shown in FIG. 3, the main unit 100B includes a power supply circuit 91, a communication circuit 92, a CPU 93, a display unit 94, a storage unit 95, an operation setting unit 96, an external output circuit 97, an analog output circuit 98, and an external input circuit 99. Prepare.

  A cable 80 is connected to the power supply circuit 91 and the communication circuit 92. The power supply circuit 91 includes a power supply source such as a battery, and supplies the power to each component of the main body 100B and the head 100A. The communication circuit 92 performs communication between the CPU 93 and the head unit 100A via the cable 80.

  The storage unit 95 stores the emissivity of the measurement object, an arithmetic expression, a threshold value for determination, and the like. The user can set the emissivity and threshold value of the measurement object by operating the operation setting unit 96. The set emissivity, threshold value, and the like are stored in the storage unit 95.

  The CPU 93 controls the operation of each component of the main body 100B. In addition, the CPU 93 determines the magnitude relationship between the measured temperature value given from the head unit 100 </ b> A and the threshold value stored in the storage unit 95, generates a determination signal based on the determination result, and passes through the external output circuit 97. Output to the cable 81. Further, the CPU 93 outputs a determination signal to the cable 80 via the communication circuit 92.

  For example, the determination signal is turned on (for example, high level) when the measured temperature value is higher than the threshold value, and is turned off (for example, low level) when the measured temperature value is equal to or less than the threshold value.

  Further, the CPU 93 outputs the measured temperature value given from the head unit 100A to the cable 81 via the external output circuit 97 and outputs an analog signal corresponding to the measured temperature value to the cable 81 via the analog output circuit 98. .

  The external input circuit 99 is connected to the CPU 93 and is connected to an external device (not shown) via the cable 82. An external signal is input to the external input circuit 99 from an external device. This external signal is a signal for controlling driving of the laser diodes 60 and 70 of the head portion 100A.

  The external input circuit 99 gives the input external signal to the CPU 93. The CPU 93 sends a laser command signal for instructing turning on and off of the laser diodes 60 and 70 via the communication circuit 92 based on the ON state (for example, high level) or the OFF state (for example, low level) of the external signal. Output to 80.

  In the present embodiment, when the lighting of the laser diodes 60 and 70 is commanded, the laser command signal is turned on (for example, high level). Further, when the laser diodes 60 and 70 are instructed to be turned off, the laser command signal is turned off (for example, low level).

  Thereby, in head part 100A of radiation thermometer 100 concerning this embodiment, the lighting state of laser diodes 60 and 70 is controlled by the laser command signal based on an external signal.

  The radiation thermometer 100 according to the present embodiment is used as follows, for example.

  FIG. 4 is a diagram for explaining an application example of the radiation thermometer 100 according to the first embodiment.

  In the example of FIG. 4, the head unit 100A is installed at a predetermined position above the belt conveyor BR, and the temperature of the measurement object W conveyed by the belt conveyor BR is measured.

  As shown in FIGS. 4A and 4B, a plurality of measurement objects W are conveyed in the direction of the arrow T while maintaining a predetermined interval on the belt conveyor BR.

  In this example, the head unit 100A receives infrared rays emitted from the measuring object W or the belt conveyor BR located immediately below the head unit 100A, and calculates a measured temperature value. When the measurement object W is transported by the belt conveyor BR, the infrared ray R emitted from the measurement object W and the infrared ray R emitted from the belt conveyor BR are alternately incident on the head unit 100A.

  Here, as shown in FIG. 4A, the head unit 100A emits the laser light L from the laser diodes 60 and 70 only when the measurement object W is positioned immediately below (lighting of the laser diodes 60 and 70). . On the other hand, as shown in FIG. 4B, the head unit 100A does not emit the laser light L from the laser diodes 60 and 70 (the laser diodes 60 and 70 are turned off) when the measurement target W is not located directly below the head object 100A.

  As described above, switching between turning on and off of the laser diodes 60 and 70 is controlled by an external signal input to the main body 100B. The switching of the on / off state of the external signal is synchronized with the conveyance of the measuring object W by the belt conveyor BR. In this example, the external signal is turned on when the measurement object W is positioned directly below the head unit 100A, and is turned off when the measurement object W is not positioned directly below the head unit 100A.

  When the external signal is turned on, the CPU 93 (FIG. 3) of the main body 100B turns on the laser command signal and outputs it to the CPU 34 (FIG. 2) of the head 100A. Therefore, the CPU 34 turns on the laser diodes 60 and 70 in response to the laser command signal in the on state.

  On the other hand, when the external signal is turned off, the CPU 93 of the main body 100B turns off the laser command signal and outputs it to the CPU 34 of the head 100A. Therefore, the CPU 34 turns off the laser diodes 60 and 70 in response to the OFF laser command signal.

  Accordingly, the user can easily know the measurement location and the measurement timing of the measurement target W because the measurement location is instructed by the laser diodes 60 and 70 at the timing when the measurement temperature value of the measurement target W is calculated. Can do.

  FIG. 5 is a diagram for explaining another application example of the radiation thermometer 100 according to the first embodiment. The application example of FIG. 5 differs from the application example of FIG. 4 in the following points.

  In the example of FIG. 5, the measuring object W has a spherical shape. In this example, the external signal is turned on when the central portion of the measuring object W is located immediately below the head portion 100A, and is turned off when the central portion of the measuring object W is not located immediately below the head portion 100A. Become.

  As a result, as shown in FIG. 5A, the head unit 100A emits the laser beam L from the laser diodes 60 and 70 only when the central portion of the measurement object W is located immediately below the laser beam 60 (70). Lights up). On the other hand, as shown in FIG. 5B, the head portion 100A does not emit the laser light L from the laser diodes 60 and 70 when the central portion of the measurement object W is not located immediately below (the laser diodes 60 and 70). Off).

  In general, the emissivity of the measurement object W changes according to the radiation direction of infrared rays. Therefore, when it is desired to accurately obtain the measurement temperature values of the plurality of measurement objects W, the measurement temperature values are preferably calculated from infrared rays radiated from each measurement object W in the vertical direction.

  As described above, the laser diodes 60 and 70 are turned on only when the measurement temperature value at the center of the measurement target W is calculated, and the measurement location is indicated, so that the user can measure the measurement location of the measurement target W. As well as the measurement timing can be easily known. Thereby, it can be easily recognized whether or not the temperature of the measurement object W is accurately measured.

  Based on FIG. 6, the operation of the head portion 100A of the radiation thermometer 100 will be described. FIG. 6 is a flowchart for explaining the operation of the head unit 100A of the radiation thermometer 100 according to the first embodiment.

  First, the CPU 34 of the head unit 100A calculates a measured temperature value based on the infrared energy of the measurement object W detected by the infrared light receiving unit 11 (FIG. 2), and transmits the measured temperature value to the main body unit 100B ( Step S11).

  Subsequently, the CPU 34 determines whether or not a laser command signal has been received from the main body 100B (step S12).

  CPU34 discriminate | determines whether a laser command signal is an ON state, when a laser command signal is received (step S13).

  When the laser command signal is on, the CPU 34 lights the laser diodes 60 and 70 by controlling the laser drive circuits 37 and 43 (FIG. 2) (step S14).

  On the other hand, when the laser command signal is in the OFF state, the CPU 34 turns off the laser diodes 60 and 70 by controlling the laser drive circuits 37 and 43 (step S15).

  Based on FIG. 7, operation | movement of the main-body part 100B of the radiation thermometer 100 is demonstrated. FIG. 7 is a flowchart for explaining the operation of the main body 100B of the radiation thermometer 100 according to the first embodiment.

  First, the CPU 93 of the main unit 100B receives the measured temperature value from the head unit 100A and also receives an external signal from an external device (not shown) connected via the cable 82 (step S21). Therefore, the CPU 93 determines whether or not the external signal is on (step S22).

  When the external signal is in the on state, the CPU 93 transmits an on state laser command signal to the head unit 100A and commands the laser diodes 60 and 70 to be lit (step S23). On the other hand, when the external signal is not in the on state (in the off state), the CPU 93 transmits a laser command signal in the off state to the head unit 100A, and commands the laser diodes 60 and 70 to be turned off (step S24).

  Then, CPU93 performs the determination process regarding the received measured temperature value (step S25). This determination process refers to a process for generating an ON state or OFF state determination signal by determining whether or not the received measured temperature value is higher than a threshold value stored in the storage unit 95.

  Therefore, the CPU 93 transmits the generated determination signal to the head unit 100A and to an external device (not shown) connected via the cable 81 (step S26).

  As described above, according to the radiation thermometer 100 according to the first embodiment, laser light is emitted from the laser diodes 60 and 70 to the measurement target W at the timing when the temperature of the measurement target W is calculated. The measurement location is indicated. Thereby, the user can easily know the measurement location and measurement timing of the measurement object W.

  Further, since the CPU 93 determines whether or not the measured temperature value satisfies a predetermined condition and outputs the determination result, the user can easily determine whether or not the temperature of the measurement object W satisfies the predetermined condition. Can know.

  In the radiation thermometer 100 according to the first embodiment, the lighting state of the laser diodes 60 and 70 based on switching of the on / off state of the external signal can be arbitrarily set. For example, the laser diodes 60 and 70 may blink when the external signal is on or off, and the laser diodes 60 and 70 may be lit in different colors depending on whether the external signal is on or off.

  In the radiation thermometer 100 according to the present embodiment, the external device that inputs an external signal to the main body 100B may be, for example, a sensor that detects the measurement object W. In this case, when the sensor detects the measurement object W, it becomes easy to synchronize the switching of the ON / OFF state of the external signal with the conveyance of the measurement object W.

  The external device may be a control device that controls the conveyance speed of the belt conveyor BR. Even in this case, it becomes easy to synchronize the switching of the ON / OFF state of the external signal with the conveyance of the measuring object W.

(Second Embodiment)
The radiation thermometer according to the second embodiment has the same configuration and operation as the radiation thermometer 100 according to the first embodiment except for the following points.

  In radiation thermometer 100 according to the present embodiment, CPU 93 (FIG. 3) of main body 100B switches the on / off state of the laser command signal based on the on / off state of the determination signal, and outputs the laser command signal. Transmit to the head unit 100A.

  Thereby, in head part 100A of radiation thermometer 100 concerning this embodiment, the lighting state of laser diodes 60 and 70 is controlled by the laser command signal based on the ON / OFF state of the determination signal.

  The radiation thermometer 100 according to the present embodiment is used as follows, for example.

  FIG. 8 is a diagram for explaining an application example of the radiation thermometer 100 according to the second embodiment. In this example, a plurality of radiation thermometers 100 are used. FIG. 8A shows the temperature measurement status of the measuring object W by the plurality of radiation thermometers 100. 8B and 8C are top views of the measurement object W. FIG.

  In the example of FIG. 8, a plurality of head portions 100 </ b> A are installed at predetermined positions above a measurement object W having a longitudinal shape, and temperatures at a plurality of locations of the measurement object W are measured. According to FIG. 8A, the five head parts 100A are arranged at equal intervals along the longitudinal direction of the measuring object W. Thereby, the temperature of five places of the measuring object W is measured (refer measurement part p1-p5).

  Here, as shown in FIG. 8B, a case is assumed in which the temperature of the specific portion e1 of the measurement target W is higher than that of other portions. That is, it is assumed that the temperature of the specific part e1 is higher than the threshold value stored in the storage unit 95 of FIG.

  In this case, in the radiation thermometer 100 that measures the temperature of the measurement location p4, the determination signal is turned on when the measured temperature value is higher than the threshold value. As a result, the CPU 93 of the main body 100B turns on the laser command signal and outputs it to the CPU 34 (FIG. 2) of the head 100A. Therefore, the CPU 34 turns on the laser diodes 60 and 70 in response to the laser command signal in the on state.

  On the other hand, in the radiation thermometer 100 that measures the temperatures of the measurement points p1, p2, p3, and p5, the determination signal is turned off when the measured temperature value is equal to or less than the threshold value. As a result, the CPU 93 of the main body 100B turns off the laser command signal and outputs it to the CPU 34 of the head 100A. Therefore, the CPU 34 turns off the laser diodes 60 and 70 in response to the OFF laser command signal.

  As a result, as shown in FIG. 8C, among the plurality of radiation thermometers 100, the laser diodes 60 and 70 of the head unit 100A that measures the temperature of the measurement location p4 are turned on, and the measurement location p4 is caused by laser light. Instructed.

  Thereby, the user can easily know the location at the abnormal temperature by the instruction of the laser beam. In other words, the user can accurately know the determination result of the temperature of the measurement object W and the actual measurement location.

  In the second embodiment, the operation of the head unit 100A of the radiation thermometer 100 is the same as the operation of the head unit 100A of the radiation thermometer 100 according to the first embodiment.

  Based on FIG. 9, operation | movement of the main-body part 100B of the radiation thermometer 100 is demonstrated. FIG. 9 is a flowchart for explaining the operation of the main body 100B of the radiation thermometer 100 according to the second embodiment.

  First, the CPU 93 of the main body 100B receives the measured temperature value from the head 100A (step S31). Therefore, the CPU 93 performs a determination process regarding the received measured temperature value (step S32). This determination processing is the same as in the first embodiment.

  Next, the CPU 93 determines whether or not the determination signal is on (step S33).

  When the determination signal is in the on state, the CPU 93 transmits an on-state laser command signal to the head unit 100A and commands the laser diodes 60 and 70 to be lit (step S34). On the other hand, when the determination signal is not in the on state (in the off state), the CPU 93 transmits a laser command signal in the off state to the head unit 100A, and commands the laser diodes 60 and 70 to be turned off (step S35).

  After the operations of steps S34 and S35, the CPU 93 transmits the generated determination signal to the head unit 100A and to an external device (not shown) connected via the cable 81 (step S36).

  As described above, according to the radiation thermometer 100 according to the second embodiment, the lighting state of the laser diodes 60 and 70 changes depending on whether or not the measured temperature value satisfies a predetermined condition. As a result, the indication state by the laser beam at the measurement location changes, so that the user can easily and accurately know the determination result whether the temperature of the measurement object W satisfies the predetermined condition and the actual measurement location. Can do.

  Further, the CPU 93 determines whether or not the measured temperature value satisfies a predetermined condition based on the threshold value. Thereby, the user can easily set the predetermined condition of the temperature of the measuring object W by the threshold value.

  Furthermore, since the CPU 93 determines whether or not the measured temperature value satisfies a predetermined condition and outputs the determination result, the user can easily determine whether or not the temperature of the measurement object W satisfies the predetermined condition. Can know.

  In the radiation thermometer 100 according to the second embodiment, the mode of the lighting state of the laser diodes 60 and 70 based on the switching of the ON / OFF state of the determination signal can be arbitrarily set. For example, the laser diodes 60 and 70 may be blinked when the determination signal is on or off, and the laser diodes 60 and 70 may be lit in different colors depending on whether the determination signal is on or off.

(Third embodiment)
The radiation thermometer according to the third embodiment has the same configuration and operation as the radiation thermometer 100 according to the second embodiment except for the following points.

  In radiation thermometer 100 according to the present embodiment, CPU 93 (FIG. 3) of main unit 100B determines the on / off state of the laser command signal based on the on / off state of the power source and the on / off state of the determination signal. While switching, the laser command signal is transmitted to the head unit 100A.

  In the present embodiment, switching of the on / off state of the laser command signal is performed, for example, as follows.

  First, the CPU 93 turns on the laser command signal when the power is turned on. Accordingly, the CPU 93 instructs the head unit 100A to turn on the laser diodes 60 and 70. Thereby, the laser diodes 60 and 70 are turned on.

  Here, the CPU 93 repeats switching of the on / off state of the laser command signal when the determination signal is in the on state. This switching is performed at a predetermined cycle. As a result, the CPU 93 instructs the head unit 100A to blink the laser diodes 60 and 70. Thereby, the laser diodes 60 and 70 blink.

  On the other hand, the CPU 93 turns the laser command signal on when the determination signal is off. Accordingly, the CPU 93 instructs the head unit 100A to turn on the laser diodes 60 and 70. Thereby, the laser diodes 60 and 70 are turned on.

  As described above, in the head portion 100A of the radiation thermometer 100 according to the present embodiment, the lighting state of the laser diodes 60 and 70 is determined by the laser command signal based on the on / off state of the power source and the on / off state of the determination signal. Be controlled.

  The radiation thermometer 100 according to the present embodiment is used as follows, for example.

  FIG. 10 is a diagram for explaining an application example of the radiation thermometer 100 according to the third embodiment. FIG. 10A shows the temperature measurement status of the measurement objects W1 to W4 by the radiation thermometer 100. FIG. 10B and 10C are top views of a plurality of measurement objects W1 to W4 conveyed by the belt conveyor BR.

  In the example of FIG. 10, the head portion 100A is installed at a predetermined position above the belt conveyor BR, and the temperatures of the measurement objects W1 to W4 conveyed by the belt conveyor BR are measured.

  In the following description, it is assumed that the temperature of the measurement object W3 is higher than the temperatures of the other measurement objects W1, W2, and W4. That is, the temperature of the measurement object W3 is higher than the threshold value stored in the storage unit 95 (FIG. 3) of the main body 100B, and the temperatures of the other measurement objects W1, W2, and W4 are thresholds. It shall have a temperature below the value.

  As shown in FIG. 10A, a plurality of measurement objects W1 to W4 are conveyed in the direction of the arrow T while maintaining a predetermined interval on the belt conveyor BR.

  In this example, the head unit 100A receives the infrared rays R emitted from the measurement objects W1 to W4 or the belt conveyor BR located immediately below it, and calculates a measurement temperature value. When the measurement objects W1 to W4 are conveyed by the belt conveyor BR, the infrared rays R emitted from the measurement objects W1 to W4 and the infrared rays R emitted from the belt conveyor BR are alternately incident on the head unit 100A. The

  When the power source of the radiation thermometer 100 is turned on, the CPU 93 of the main body 100B turns on the laser command signal and outputs it to the CPU 34 (FIG. 2) of the head 100A. Therefore, the CPU 34 turns on the laser diodes 60 and 70 in response to the laser command signal in the on state.

  Here, as shown in FIG. 10 (b), the CPU 93 of the main body portion 100B gives a determination signal when the temperatures of the measuring objects W1, W2, and W4 are below the threshold values. Turn off. In this case, the CPU 93 turns on the laser command signal as described above, and commands the head unit 100A to turn on the laser diodes 60 and 70. Thereby, the CPU 93 lights the laser diodes 60 and 70.

  On the other hand, as shown in FIG. 10C, the CPU 93 of the main body 100B turns on the determination signal when the temperature of the measurement object W3 is higher than the threshold value when measuring the temperature of the measurement object W3. In this case, the CPU 93 switches the on / off state of the laser command signal at a predetermined cycle as described above, and commands the head unit 100A to blink the laser diodes 60 and 70. Thereby, the CPU 93 causes the laser diodes 60 and 70 to blink.

  As a result, the user changes the lighting state of the laser diodes 60 and 70 when the measured temperature values of the measurement objects W1 to W4 are higher than the threshold value. It can be easily known by flashing light. In other words, the user can easily and accurately know the temperature determination results and actual measurement locations of the measurement objects W1 to W4.

  Based on FIG. 11, the operation of the head portion 100A of the radiation thermometer 100 will be described. FIG. 11 is a flowchart for explaining the operation of the head unit 100A of the radiation thermometer 100 according to the third embodiment.

  First, the CPU 34 of the head unit 100A receives an on-state laser command signal from the main body unit 100B, and turns on the laser diodes 60 and 70 by controlling the laser drive circuits 37 and 43 (FIG. 2) (step S41). ).

  Next, the CPU 34 calculates a measured temperature value based on the infrared energy of the measurement objects W1 to W4 detected by the infrared light receiving unit 11 (FIG. 2), and transmits the measured temperature value to the main body 100B (step S42). ).

  Here, the CPU 34 determines whether or not a command to blink the laser diodes 60 and 70 has been received (step S43). When the CPU 34 receives a command to blink the laser diodes 60 and 70, the CPU 34 blinks the laser diodes 60 and 70 (step S44). On the other hand, when the CPU 34 does not receive a command to blink the laser diodes 60 and 70, the CPU 34 maintains the lighting state of the laser diodes 60 and 70 (step S45).

  Based on FIG. 12, operation | movement of the main-body part 100B of the radiation thermometer 100 is demonstrated. FIG. 12 is a flowchart for explaining the operation of the main body 100B of the radiation thermometer 100 according to the third embodiment.

  First, the CPU 93 of the main body 100B transmits an on-state laser command signal to the head 100A in response to turning on the power (step S51). Next, the CPU 93 receives the measured temperature value from the head unit 100A (step S52). And CPU93 performs the determination process regarding the received measured temperature value (step S53). This determination process is the same as the determination process in the first embodiment.

  Subsequently, the CPU 93 determines whether the generated determination signal is in an on state or an off state (step S54).

  When the determination signal is in the on state, the CPU 93 transmits a laser command signal for switching the on / off state at a predetermined cycle to the head unit 100A, and commands the blinking of the laser diodes 60 and 70 (step S55). Then, the CPU 93 transmits the generated determination signal to the head unit 100A and to an external device (not shown) connected through the cable 81 (step S56).

  If the determination signal is off in step S54, the CPU 93 performs the operation in step S56 without commanding the laser diodes 60 and 70 to blink.

  Also in the radiation thermometer 100 according to the third embodiment, the lighting state of the laser diodes 60 and 70 based on the ON / OFF switching of the determination signal can be arbitrarily set. For example, the laser diodes 60 and 70 may be blinked when the determination signal is on or off, and the laser diodes 60 and 70 may be lit in different colors depending on whether the determination signal is on or off.

(Fourth embodiment)
The radiation thermometer according to the fourth embodiment has the same configuration and operation as the radiation thermometer 100 according to the second embodiment except for the following points.

  In radiation thermometer 100 according to the present embodiment, storage unit 95 (FIG. 3) of main body unit 100B stores a first threshold value and a second threshold value higher than the first threshold value. ing. Thereby, the CPU 93 (FIG. 3) of the main body 100B performs the first determination process based on the first threshold value, and generates the first determination signal as the first determination result. Further, the CPU 93 of the main body 100B performs a second determination process based on the second threshold value, and generates a second determination signal as the second determination result.

  The CPU 93 outputs the generated first and second determination signals to the cable 80 via the communication circuit 92. Further, the CPU 93 transmits a first laser command signal and a second laser command signal to the head unit 100A according to the on / off states of the first and second determination signals.

  In the radiation thermometer 100 according to the present embodiment, the CPU 93 of the main body 100B switches the on / off state of the laser command signal based on the on / off states of the first and second determination signals, and the laser command. A signal is transmitted to the head unit 100A.

  In the present embodiment, on / off switching of the laser command signal is performed, for example, as follows.

  The CPU 93 repeats switching of the on / off state of the laser command signal in the first cycle when the first and second determination signals are in the on state. As a result, the CPU 93 instructs the head unit 100A to blink the laser diodes 60 and 70 in the first cycle. Thereby, the laser diodes 60 and 70 blink at the first period.

  On the other hand, when either one of the first and second determination signals is in the on state, the CPU 93 repeats switching of the on / off state of the laser command signal in the second period. This second period is longer than the first period described above. As a result, the CPU 93 instructs the head unit 100A to blink the laser diodes 60 and 70 in the second period. As a result, the laser diodes 60 and 70 blink at the second period.

  Thus, in the head portion 100A of the radiation thermometer 100 according to the present embodiment, the lighting states of the laser diodes 60 and 70 are controlled by the on / off states of the first and second determination signals.

  The radiation thermometer 100 according to the present embodiment is used as follows, for example.

  FIG. 13 is a diagram for explaining an application example of the radiation thermometer 100 according to the fourth embodiment. In this example, a plurality of radiation thermometers 100 are used. FIG. 13A shows the temperature measurement status of the measurement object W by the plurality of radiation thermometers 100. FIGS. 13B and 13C are top views of the measuring object W. FIG.

  In the example of FIG. 13, a plurality of head portions 100 </ b> A are installed at predetermined positions above the measurement target W having a longitudinal shape, and temperatures at a plurality of locations of the measurement target W are measured. According to FIG. 13A, the five head portions 100A are arranged at equal intervals along the longitudinal direction of the measuring object W. Thereby, the temperature of five places of the measuring object W is measured (refer measurement part p1-p5).

  Here, as shown in FIG. 13B, the temperature of the first part e2 of the measurement object W is extremely higher than the other parts, and the temperature of the second part e3 of the measurement object W is other than the other part. Assume a slightly higher case than the part. That is, the temperature of the first portion f1 is higher than the first and second threshold values, and the temperature of the second portion f2 is higher than the first threshold value and lower than the second threshold value. Is assumed.

  In this case, in the radiation thermometer 100 that measures the temperature of the measurement location p5, the first and second determination signals are turned on because the measured temperature value is higher than the first and second threshold values. As a result, the CPU 93 of the main unit 100B switches the on / off state of the laser command signal at the first cycle as described above, and commands the head unit 100A to blink the laser diodes 60 and 70 at the first cycle. Thereby, the CPU 93 causes the laser diode 60 and the laser diode 70 to blink at the first period.

  On the other hand, in the radiation thermometer 100 that measures the temperatures of the measurement points p3 and p4, the first determination signal is generated when the measured temperature value is higher than the first threshold value and lower than or equal to the second threshold value. The state is turned off, and the second determination signal is turned on. As a result, the CPU 93 of the main body 100B switches the on / off state of the laser command signal in the second cycle as described above, and commands the head 100A to blink the laser diodes 60 and 70 in the second cycle. Thereby, the CPU 93 causes the laser diode 60 and the laser diode 70 to blink slowly in a second period longer than the first period.

  On the other hand, in the radiation thermometer 100 that measures the temperatures of the measurement points p1 and p2, the first and second determination signals are turned off when the measured temperature value is equal to or lower than the first and second threshold values. . As a result, the CPU 93 of the main body 100B turns off the laser command signal as described above, and commands the head 100A to turn off the laser diodes 60 and 70. Thereby, the CPU 93 turns off the laser diode 60 and the laser diode 70.

  As a result, as shown in FIG. 13C, the laser diodes 60 and 70 of the head unit 100A that measures the measurement point p5 blink in the first cycle, and the measurement point p5 is indicated. In addition, the laser diodes 60 and 70 of the head unit 100A that measures the measurement points p3 and p4 blink in the second cycle, and the measurement points p3 and p4 are indicated.

  As a result, the user can easily know the location where the temperature is abnormal by instructing the laser beam, and the degree of the abnormal temperature can be determined by the blinking state of the measurement location. Can be easily and accurately known.

  Based on FIG. 14, the operation of the head portion 100A of the radiation thermometer 100 will be described. FIG. 14 is a flowchart for explaining the operation of the head unit 100A of the radiation thermometer 100 according to the fourth embodiment.

  First, the CPU 34 of the head unit 100A calculates a measured temperature value based on the infrared energy of the measurement object W detected by the infrared light receiving unit 11 (FIG. 2), and transmits the measured temperature value to the main body unit 100B ( Step S61).

  Subsequently, the CPU 34 determines whether or not a laser command signal has been received from the main body 100B (step S62).

  When receiving the laser command signal, the CPU 34 determines whether or not a command to turn off the laser diodes 60 and 70 has been received (step S63). When the CPU 34 receives an instruction to turn off 60, 70, the CPU 34 turns off the laser diodes 60, 70 (step S64).

  In step S63, when the CPU 34 does not receive a command to turn off the laser diodes 60 and 70, the CPU 34 determines whether or not a command to blink the first period of the laser diodes 60 and 70 has been received (step S65).

  When the CPU 34 receives a command for blinking the first period of the laser diodes 60 and 70, the CPU 34 blinks the laser diodes 60 and 70 in the first period (step S66). When the CPU 34 does not receive a command for blinking the first period of the laser diodes 60, 70, it receives a command for blinking the second period of the laser diodes 60, 70. Thereby, the CPU 34 blinks the laser diodes 60 and 70 in the second cycle (step S67).

  Based on FIG. 15, operation | movement of the main-body part 100B of the radiation thermometer 100 is demonstrated. FIG. 15 is a flowchart for explaining the operation of the main body 100B of the radiation thermometer 100 according to the fourth embodiment.

  First, the CPU 93 of the main body unit 100B receives the measured temperature value from the head unit 100A (step S71). Therefore, the CPU 93 performs a first determination process regarding the received measured temperature value (step S72), and determines whether or not the first determination signal is in an on state (step S73).

  When the first determination signal is in the on state, the CPU 93 performs the second determination process (step S74), and determines whether or not the second determination signal is in the on state (step S75).

  When the second determination signal is in the on state, the CPU 93 transmits a laser command signal for switching the on / off state in the first cycle to the head unit 100A, and causes the laser diodes 60 and 70 to blink in the first cycle. Command (step S76). Then, the CPU 93 transmits the generated first and second determination signals to the head unit 100A and also to an external device (not shown) connected through the cable 81 (step S77).

  On the other hand, when the second determination signal is in the off state, the CPU 93 transmits a laser command signal for switching the on / off state in the second cycle to the head unit 100A, and the second cycle of the laser diodes 60 and 70. The blinking is instructed (step S76). Thereafter, the CPU 93 performs the same operation as in step S77.

  In step S73, when the first determination signal is in an off state, the CPU 93 performs a second determination process (step S84), and whether the second determination signal is in an on state or an off state. Is discriminated (step S85).

  When the second determination signal is in the on state, the CPU 93 transmits a laser command signal for switching the on / off state in the second cycle to the head unit 100A, and causes the laser diodes 60 and 70 to blink in the second cycle. Command (step S86). Thereafter, the CPU 93 performs the same operation as in step S77.

  On the other hand, when the second determination signal is in the off state, the CPU 93 transmits a laser command signal in the off state to the head unit 100A, and commands to turn off the laser diodes 60 and 70 (step S88). Thereafter, the CPU 93 performs the same operation as in step S77.

  As described above, according to the radiation thermometer 100 according to the third embodiment, the CPU 93 determines whether or not the measured temperature value satisfies each of the plurality of conditions based on the plurality of threshold values. . Thereby, the user can easily set a plurality of conditions of the temperature of the measuring object W with a plurality of threshold values.

  Further, the user can easily and accurately know the determination result as to whether the measured temperature value satisfies a plurality of conditions and the actual measurement location based on the lighting state of the laser diodes 60 and 70.

  In the radiation thermometer 100 according to the fourth embodiment, the lighting state of the laser diodes 60 and 70 based on the on / off state switching of the first and second determination signals can be arbitrarily set.

  For example, when both the first and second determination signals are on or off, and when either one of the first and second determination means is on and the other is off, the laser The diodes 60 and 70 may be lit in different colors.

  As described above, in the radiation thermometer 100 according to the first to fourth embodiments, the thermopile 10 and the infrared light receiving unit 11 correspond to the infrared detection unit, the CPU 34 of the head unit 100A corresponds to the calculation unit, the laser diode 60, 70 corresponds to a light source, the CPU 34 of the head portion 100A and the CPU 93 of the main body portion 100B correspond to control means, and the CPU 93 of the main body portion 100B corresponds to determination means. The output circuit 97 and the analog output circuit 98 correspond to output means.

(Regarding the mode of indication of measurement points by laser diode)
In the above first to fourth embodiments, description will be given of the indication form of the measurement location by the laser diodes 60 and 70 of FIG.

  FIG. 16 is a diagram showing an indication form of measurement points by the laser diodes 60 and 70 of FIG. In the following description, laser beams L1 and L2 are emitted from the laser diodes 60 and 70 of the head unit 100A when each is turned on and blinked.

  For example, as shown to Fig.16 (a), the upper end of measurement location SP is instruct | indicated with laser beam L1 with respect to measurement location SP, and the lower end of measurement location SP is instruct | indicated with laser beam L2. In this case, the user can easily know the range of the measurement spot SP.

  Further, as shown in FIG. 16B, the emission angles of the laser diode 60 and the laser diode 70 are set so that the laser light L1 and the laser light L2 intersect at the center of the measurement point SP. In this case, the user can easily know whether or not the distance Q between the head portion 100A and the measurement target portion SP is appropriate.

  Further, as shown in FIG. 16C, the emission angles of the laser diode 60 and the laser diode 70 are set so that the laser beam L1 and the laser beam L2 intersect at the center of the measurement point SP, and the laser beams L1 and L2 Are emitted at a predetermined spread angle. In this case, the user can easily know whether the distance Q between the head portion 100A and the measurement target point SP is appropriate, and can easily know the range of the measurement point SP.

  As shown in FIG. 16D, the emission angles of the laser diode 60 and the laser diode 70 are set so that the ring-shaped laser beam L1 and the laser beam L2 intersect at the center of the measurement point SP, and the laser beams L1, L2 is emitted at a predetermined spread angle. Even in this case, the user can easily know whether the distance Q between the head portion 100A and the measurement target spot SP is appropriate, and can easily know the range of the measurement spot SP. In addition, the indication method of measurement location SP is not specifically limited to the example of Fig.16 (a), (b), (c), (d).

  The present invention can be used to detect infrared energy emitted from an object.

It is a block diagram of the radiation thermometer which concerns on 1st embodiment. It is a block diagram of the head part of FIG. It is a block diagram of the main-body part of FIG. It is a figure for demonstrating one application example of the radiation thermometer which concerns on 1st Embodiment. It is a figure for demonstrating the other application example of the radiation thermometer which concerns on 1st Embodiment. It is a flowchart for demonstrating operation | movement of the head part of the radiation thermometer which concerns on 1st Embodiment. It is a flowchart for demonstrating operation | movement of the main-body part of the radiation thermometer which concerns on 1st Embodiment. It is a figure for demonstrating one application example of the radiation thermometer which concerns on 2nd Embodiment. It is a flowchart for demonstrating operation | movement of the main-body part of the radiation thermometer which concerns on 2nd Embodiment. It is a figure for demonstrating one application example of the radiation thermometer which concerns on 3rd Embodiment. It is a flowchart for demonstrating operation | movement of the head part of the radiation thermometer which concerns on 3rd Embodiment. It is a flowchart for demonstrating operation | movement of the main-body part of the radiation thermometer which concerns on 3rd Embodiment. It is a figure for demonstrating one application example of the radiation thermometer which concerns on 4th Embodiment. It is a flowchart for demonstrating operation | movement of the head part of the radiation thermometer which concerns on 4th Embodiment. It is a flowchart for demonstrating operation | movement of the main-body part of the radiation thermometer which concerns on 4th Embodiment. It is a figure which shows the indication form of the measurement location by the laser diode of FIG.

Explanation of symbols

10 Thermopile 11 Infrared detector 34,93 CPU
36 Indicator lamp 60, 70 Laser diode 97 External output circuit 98 Analog output circuit 100 Radiation thermometer 100A Head unit 100B Main unit

Claims (6)

A radiation thermometer that measures the temperature of an object to be measured,
Infrared detecting means for detecting infrared energy from the measurement object;
A calculation means for calculating a temperature of the measurement object based on an output signal of the infrared detection means;
A light source for emitting light to the measurement object;
A radiation thermometer comprising control means for controlling a lighting state of the light source based on an external signal indicating a measurement timing of the measurement object. Determination means for determining whether or not the temperature calculated by the calculation means satisfies a predetermined condition;
The radiation thermometer according to claim 1, further comprising an output unit that outputs a determination result of the determination unit. A radiation thermometer that measures the temperature of an object to be measured,
Infrared detecting means for detecting infrared energy from the measurement object;
A calculation means for calculating a temperature of the measurement object based on an output signal of the infrared detection means;
A light source for emitting light to the measurement object;
Determination means for determining whether the temperature of the measurement object calculated by the calculation means satisfies a predetermined condition;
A radiation thermometer comprising: control means for controlling a lighting state of the light source based on a determination result of the determination means. The determination means determines whether the temperature of the measurement object calculated by the calculation means satisfies a predetermined condition based on the temperature of the measurement object calculated by the calculation means and a preset temperature threshold value. 4. The radiation thermometer according to claim 3, wherein it is determined whether or not it is satisfied. The threshold value includes a plurality of different threshold values,
The determination unit determines whether or not the temperature of the measurement object calculated by the calculation unit based on the plurality of threshold values satisfies each of a plurality of conditions,
The radiation thermometer according to claim 4, wherein the control unit controls the lighting state of the light source in a plurality of modes based on a determination result of the determination unit. 6. The radiation thermometer according to claim 3, further comprising output means for outputting a determination result of the determination means.

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