JP2021162435A - Temperature sensor system and conveyor temperature monitoring facility - Google Patents

Abstract

To make it easier to change the setting of an infrared sensor used in a temperature sensor system.SOLUTION: A temperature sensor system includes a temperature sensor 1, a warning board 2, and a maintenance PC 3. The temperature sensor 1 divides a monitor region into a plurality of pixels, measures the temperature of each obtained pixel periodically, and outputs an abnormal temperature detection signal when there is a detection showing that the measurement result matches a condition stored in advance. The warning device 2 is connected to the temperature sensor 1, and outputs a warning when receiving an abnormal temperature detection signal. The warning board 2 has a connector to which the maintenance PC 3 is removably connected and which allows the maintenance PC 3 to set the above condition through a communication with the temperature sensor 1.SELECTED DRAWING: Figure 1

Description

The present invention relates to a system for detecting an abnormal temperature in a monitoring area and outputting an alarm.

Conventionally, a device for detecting the occurrence of a fire by detecting a high temperature object using an infrared sensor has been known (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2004-999264

In this device, there is a need to freely set various parameters used in the infrared sensor according to the monitoring target and the monitoring environment. This is to suppress false detection by the infrared sensor.

The present invention has been made in view of such circumstances, and an object of the present invention is to facilitate setting change of an infrared sensor used in a temperature sensor system.

In order to solve the above problems, the temperature sensor system according to the present invention divides the monitoring area into a plurality of pixels, periodically measures the temperature of each of the divided plurality of pixels, and stores the measurement results in advance. It is provided with an infrared temperature sensor that outputs an abnormal temperature detection signal when it is detected that the conditions are met, and an alarm panel that is connected to the infrared temperature sensor and outputs an alarm when the abnormal temperature detection signal is received. The alarm panel is a connector to which another information processing device is detachably connected, and a connector that enables the other information processing device to communicate with the infrared temperature sensor to set the condition. It is characterized by being prepared.

In a preferred embodiment, the connector further allows the other information processing device to communicate with the infrared temperature sensor to acquire and display information indicating the temperature measured by the infrared temperature sensor.

Further, the conveyor temperature monitoring equipment according to the present invention is formed on the temperature sensor system and a getter portion which is shaped like a lid and has a first through hole in the lid portion and is formed on the upper plate of a duct covering the periphery of the conveyor belt. A sensor box having a getter portion installed so as to cover the opening and a second through hole at the bottom, and the lid of the getter portion so that the second through hole communicates with the first through hole. The infrared temperature sensor is provided in the sensor box so as to be able to monitor on the conveyor belt through the first through hole, the second through hole and the opening. It is characterized by being contained.

Another conveyor temperature monitoring facility according to the present invention is the temperature sensor system and a sensor box in which the lid plate is inclined with respect to the bottom plate and the bottom plate has a first through hole. The second through hole formed in the upper plate of the covering duct is provided with a sensor box installed so that the first through hole communicates with the first through hole, and the infrared temperature sensor includes the first through hole and the second through hole. It is attached to the inner surface of the lid plate so that the top of the conveyor belt can be monitored through the hole, and the sensor box allows the infrared temperature sensor to monitor the top of the conveyor belt from diagonally behind with respect to the transport direction. It is characterized in that it is installed on the upper plate of the duct.

According to the present invention, it is easy to change the setting of the infrared sensor used in the temperature sensor system.

The figure which shows the structure of the temperature sensor system Perspective view showing the appearance of the temperature sensor 1. Block diagram showing the internal configuration of the temperature sensor 1 The figure which shows the mechanism for detecting the fouling of a window plate 42 Perspective view of the appliance for installing the temperature sensor 1 FIG. 5 is a cross-sectional view taken along the line AA. BB line cross-sectional view of FIG. The figure which shows the appliance for installing the temperature sensor 1. Perspective view of the sensor box 61 Cross-sectional view taken along the line CC of FIG. Flow chart showing temperature calculation process Flow chart showing abnormal temperature detection processing The figure which shows the structure of the alarm panel 2. Block diagram showing the configuration of maintenance PC3 Diagram showing an example of various setting screens Diagram showing an example of the monitoring mask setting screen The figure which shows an example of the emissivity setting screen Diagram showing an example of the temperature history display screen Diagram showing an example of a real-time temperature display screen

1. 1. Embodiment The temperature sensor system according to the embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing a configuration of a temperature sensor system according to the present embodiment. The temperature sensor system shown in the figure is a system for detecting an abnormal temperature in a monitoring area and outputting an alarm. This temperature sensor system includes four temperature sensors 1 installed in different places, an alarm panel 2 connected to each temperature sensor 1 by wire, and a maintenance PC 3 detachably connected to the alarm panel 2 by wire. Be prepared. Hereinafter, each component will be described.

1-1. Temperature sensor 1
The temperature sensor 1 is an infrared temperature sensor. The temperature sensor 1 divides the monitoring area into a plurality of pixels, and periodically measures the temperature for each of the divided plurality of pixels. Then, when it is detected that the measurement result matches the condition stored in advance, the abnormal temperature detection signal is output. FIG. 2 is a perspective view showing the appearance of the temperature sensor 1. FIG. 3 is a block diagram showing the internal configuration of the temperature sensor 1.

As shown in FIG. 2, the temperature sensor 1 has a substantially rectangular parallelepiped housing 41, and a substantially rectangular opening 412 is formed in the center of the front plate 411 of the housing 41. Further, a silicon window plate 42 is attached to the back surface of the front plate 411 of the housing 41 so as to close the opening 412. Further, a reflector 43 is inserted between the front plate 411 and the window plate 42 so as to cover the upper side of the window plate 42.

As shown in FIG. 3, the temperature sensor 1 housing 41 contains a processor 11, a memory 12, an infrared array sensor 13, a transmittance measurement module 14, a temperature sensor 15 inside the housing, an indicator light 16, and a communication module 17. It is contained.

Of these, the processor 11 executes a processing program stored in the memory 12 to realize various functions. The functions realized by the processor 11 will be described later.

In addition to the above processing program, the memory 12 stores the temperature information group D1, the alarm determination threshold information D2, the monitoring mask information D3, and the emissivity information D4.

Of these, the temperature information group D1 is a set of temperature information. Here, the temperature information is information indicating the temperature of each pixel calculated based on the output value of the infrared array sensor 13 and the measurement date and time of the temperature.

The alarm determination threshold information D2 is information indicating a threshold value for outputting an abnormality detection signal. Specifically, it is composed of an abnormal temperature determination threshold value and a fouling determination threshold value. Of these, the abnormal temperature determination threshold value is information indicating a threshold value for outputting an abnormal temperature detection signal. On the other hand, the fouling determination threshold value is information indicating a threshold value for outputting a fouling detection signal.

The abnormal temperature determination threshold value is further divided into an absolute value determination threshold value and a relative value determination threshold value. Of these, the absolute value determination threshold value is information on the threshold value that is referred to when the temperature threshold value is defined by the absolute temperature and the absolute temperature is compared with the measurement temperature. Specifically, it is composed of a first alarm temperature (absolute value), the number of first pixels, and the number of first frames. On the other hand, the relative value determination threshold value is information on the threshold value that the temperature threshold value is defined by the relative temperature with respect to the measurement temperature in the steady state and is referred to when the relative temperature is compared with the measurement temperature. Specifically, it is composed of a second alarm temperature (relative value), the number of second pixels, and the number of second frames.
The alarm determination threshold information D2 described above is set by the user using the maintenance PC3.

The monitoring mask information D3 is information indicating the pixels to be masked. The temperature is not calculated for the pixels indicated by the monitoring mask information D3. This monitoring mask information D3 is set by the user using the maintenance PC3.

The emissivity information D4 is information indicating the emissivity of each pixel. This emissivity information D4 is set by the user using the maintenance PC3.

Next, the infrared array sensor 13 is a sensor for measuring the temperature of a two-dimensional area with 8 × 8 pixels. The infrared array sensor 13 periodically outputs a voltage value corresponding to the detected amount of infrared rays for each of the 8 × 8 pixels.

The transmittance measuring module 14 is a component for measuring the light transmittance (in other words, the degree of fouling) of the window plate 42. The transmittance measurement module 14 includes a light source 141 and a light receiving element 142. FIG. 4 is a diagram showing a mechanism for detecting stains on the window plate 42. In the mechanism shown in the figure, the light emitted from the light source 141 is transmitted by the window plate 42 and then reflected by the reflector 43. The reflected light passes through the window plate 42 and enters the light receiving element 142. The light receiving element 142 to which the reflected light is incident outputs a voltage value according to the light transmittance (in other words, the degree of fouling) of the window plate 42.

Next, the temperature sensor 15 inside the housing is a sensor for measuring the temperature inside the housing 41.

The indicator light 16 is a light source for warning the occurrence of an abnormality. Specifically, it is composed of a red LED 161 and a green LED 162. As shown in FIG. 2, these LEDs are arranged in the housing 41 so as to be seen through the opening 412.

The communication module 17 is a component for communicating with the maintenance PC 3.

Next, an installation example of the temperature sensor 1 will be described with reference to the drawings. FIG. 5 is a perspective view of an instrument for installing the temperature sensor 1. FIG. 6 is a cross-sectional view taken along the line AA of FIG. FIG. 7 is a cross-sectional view taken along the line BB of FIG.

The conveyor belt 53 shown in these figures is a conveyor belt for transporting garbage installed in a waste treatment facility. Among the dust conveyed by the conveyor belt 53, there is dust (for example, a battery) that is crushed and ignited. When such dust ignites and ignites surrounding combustibles, a fire will occur on the conveyor belt 53. The temperature sensor 1 is installed in a conveyor duct 54 that covers the periphery of the conveyor belt 53 in order to detect the occurrence of such a fire.

As an instrument for installing the temperature sensor 1 in the conveyor duct 54, there are a geta portion 51 and a sensor box 52. Of these, the geta portion 51 has a covered square tube shape and is installed on a rectangular conveyor duct 54. An opening 542 having the same size as the opening of the geta portion 51 is formed on the upper plate 541 of the conveyor duct 54 on which the geta portion 51 is installed, and the geta portion 51 is installed so as to cover the opening 542. Will be done. A rectangular inspection door 512 that can be opened and closed is provided on the side plate 511 of the geta portion 51. The user can inspect the conveyor belt 53 by opening the inspection door 512. Further, a through hole 514 (not shown) for the temperature sensor 1 to monitor on the conveyor belt 53 is formed substantially in the center of the lid portion 513 of the geta portion 51.

On the other hand, the sensor box 52 has a rectangular parallelepiped shape and houses the temperature sensor 1. The lid plate 521 of the sensor box 52 can be opened and closed, and the temperature sensor 1 is attached to the lid plate 521. Further, a through hole 523 (not shown) for the temperature sensor 1 to monitor the conveyor belt 53 is formed in the bottom plate 522 of the sensor box 52. The sensor box 52 is installed on the lid portion 513 of the geta portion 51 so that the through hole 523 and the through hole 514 of the geta portion 51 communicate with each other. The temperature sensor 1 housed in the sensor box 52 monitors the conveyor belt 53 through the through holes 514 and 523 and the opening 542.

The installation device described above includes a geta portion 51 in addition to the sensor box 52 that houses the temperature sensor 1. By inserting the geta portion 51 between the sensor box 52 and the conveyor duct 54, the distance between the sensor box 52 and the conveyor belt 53 becomes long. As a result, it is possible to prevent the dust splashed on the conveyor belt 53 from hitting the window plate 42 of the temperature sensor 1 and damaging it. Further, as compared with the case shown in FIG. 8 in which the geta portion 51 is not used, the monitoring area of the temperature sensor 1 can be widened. In the cross-sectional view shown in FIG. 8, the upper corner in the conveyor duct 54 is a blind spot, but in the cross-sectional view shown in FIG. 7, the blind spot portion is small. Further, by inserting the geta portion 51, the user can open the inspection door 512 and inspect the conveyor belt 53.
The equipment including the geta portion 51, the sensor box 52, and the temperature sensor system described above is referred to as a conveyor temperature monitoring equipment.

Next, another installation example of the temperature sensor 1 will be described with reference to the drawings. FIG. 9 is a perspective view of the sensor box 61 for accommodating the temperature sensor 1. FIG. 10 is a cross-sectional view taken along the line CC of FIG.

The conveyor belt 62 shown in these figures is a conveyor belt for transporting dust, similarly to the conveyor belt 53 described above. In order to detect a fire that occurs on the conveyor belt 62, a sensor box 61 for accommodating the temperature sensor 1 is installed in the conveyor duct 63 that covers the periphery of the conveyor belt 62.

The lid plate 611 of the sensor box 61 can be opened and closed, and the temperature sensor 1 is attached to the inner surface of the lid plate 611. A grip portion 612 that is gripped when opening and closing the lid plate 611 is attached to the outer surface of the lid plate 611. The lid plate 611 is inclined with respect to the bottom plate 613. Further, the bottom plate 613 of the sensor box 61 is formed with a through hole 614 for the temperature sensor 1 to monitor the top of the conveyor belt 62.

The sensor box 61 is installed on a rectangular conveyor duct 63. A through hole 632 is formed in the upper plate 631 of the conveyor duct 63 in which the sensor box 61 is installed, and the sensor box 61 is installed so that the through hole 632 and the through hole 614 of the sensor box 61 communicate with each other. .. The temperature sensor 1 housed in the sensor box 61 monitors the conveyor belt 62 through the through holes 614 and 632. At that time, the temperature sensor 1 monitors from diagonally behind the conveyor belt 62 in the transport direction. Therefore, it is possible to prevent dust that bounces forward on the conveyor belt 62 from hitting the window plate 42 of the temperature sensor 1 and damaging it.
The equipment including the sensor box 61 and the temperature sensor system described above is referred to as a conveyor temperature monitoring equipment.

Next, the functions realized by the processor 11 of the temperature sensor 1 will be described. As shown in FIG. 3, the processor 11 of the temperature sensor 1 realizes the functions of the temperature calculation unit 111, the abnormal temperature detection unit 112, the fouling detection unit 113, and the setting change unit 114.

Of these, the temperature calculation unit 111 calculates the temperature of each pixel based on the voltage value output from the infrared array sensor 13. FIG. 11 is a flow chart showing this temperature calculation process. First, the temperature calculation unit 111 acquires a voltage value corresponding to the amount of infrared rays detected for each pixel from the infrared array sensor 13 (step Sa1). When the voltage value is acquired, the temperature is calculated for each pixel by substituting the voltage value and emissivity of the pixel and a predetermined correction coefficient into a predetermined equation (step Sa2). Here, the emissivity is specified for each pixel with reference to the emissivity information D4. When the temperature is calculated, the temperature information including the calculated temperature of each pixel and the measurement date and time of the temperature is stored in the memory 12 (step Sa3).
The above is the description of the temperature calculation process. This temperature calculation process is periodically executed, and temperature information is stored in the memory 12 in time series.

In the above temperature calculation process, the temperature calculation is omitted for the pixels indicated by the monitoring mask information D3.

Next, the abnormal temperature detection unit 112 detects the abnormal temperature with reference to the temperature information group D1 calculated by the temperature calculation unit 111 and stored in the memory 12. FIG. 12 is a flow chart showing this abnormal temperature detection process. The abnormal temperature detection unit 112 first acquires the temperature information that has not been acquired from the memory 12 and has the oldest measurement date and time (step Sb1). When the temperature information is acquired, the number of pixels equal to or higher than the first alarm temperature (absolute value) is specified with reference to the acquired temperature information (step Sb2). When the number of pixels is specified, it is determined whether or not the specified number is equal to or greater than the number of first pixels (step Sb3). As a result of this determination, if the specified number is equal to or greater than the number of first pixels (YES in step Sb3), the count value of the counter CA1 is incremented (step Sb4), and the process proceeds to step Sb6. On the other hand, if the specified number is not equal to or greater than the number of first pixels as a result of this determination (NO in step Sb3), the count value of the counter CA1 is reset (step Sb5), and the process proceeds to step Sb8. In step Sb6, it is determined whether or not the count value of the counter CA1 is equal to or greater than the number of first frames. As a result of this determination, when the count value of the counter CA1 is equal to or greater than the number of first frames (YES in step Sb6), an abnormal temperature detection signal is output to the alarm panel 2 and the red LED 161 is turned on (step). Sb7). Then, the process proceeds to step Sb8. On the other hand, as a result of this determination, if the count value of the counter CA1 is not equal to or greater than the number of first frames (NO in step Sb6), the process proceeds to step Sb8.

According to steps Sb1 to Sb7 described above, when the temperature information including the number of pixels equal to or higher than the first alarm temperature is continuous for the number of first frames or more, the abnormal temperature detection signal is output. By appropriately setting each threshold value for outputting the abnormal temperature detection signal according to the monitoring target and the monitoring environment, erroneous detection of the abnormal temperature can be suppressed. For example, by setting the number of first frames to 2 or more, the abnormal temperature detection signal is output only when the abnormal temperature is detected twice or more in succession for one object moving on the conveyor belt. Can be done.

Next, in step Sb8, the threshold temperature is calculated by adding the average temperature inside the housing to the second alarm temperature (relative value). Here, the average temperature inside the housing is an average value of the temperatures measured by the temperature sensor 15 inside the housing within the latest predetermined period. The information indicating the average temperature in the housing is stored in the memory 12 and is periodically updated. When the abnormal temperature detection unit 112 calculates the threshold temperature, the abnormal temperature detection unit 112 refers to the temperature information acquired in step Sb1 and specifies the number of pixels equal to or higher than the threshold temperature (step Sb9). When the number of pixels is specified, it is determined whether or not the specified number is equal to or greater than the number of second pixels (step Sb10). As a result of this determination, if the specified number is equal to or greater than the number of second pixels (YES in step Sb10), the count value of the counter CA2 is incremented (step Sb11), and the process proceeds to step Sb13. On the other hand, as a result of this determination, if the specified number is not equal to or greater than the number of second pixels (NO in step Sb10), the count value of the counter CA2 is reset (step Sb12), and the process returns to step Sb1. In step Sb13, it is determined whether or not the count value of the counter CA2 is equal to or greater than the number of second frames. As a result of this determination, when the count value of the counter CA2 is equal to or greater than the number of second frames (YES in step Sb13), an abnormal temperature detection signal is output to the alarm panel 2 and the red LED 161 is turned on (step). Sb14). On the other hand, as a result of this determination, if the count value of the counter CA2 is not equal to or greater than the number of second frames (NO in step Sb13), the process returns to step Sb1.

According to steps Sb8 to Sb14 described above, when the temperature information including the number of pixels equal to or higher than the threshold temperature is the number of the second pixel or more is continuous for the number of the second frame or more, the abnormal temperature detection signal is output. By appropriately setting each threshold value for outputting the abnormal temperature detection signal according to the monitoring target and the monitoring environment, erroneous detection of the abnormal temperature can be suppressed.
The above is the description of the abnormal temperature detection process.

Next, the fouling detection unit 113 detects the fouling of the window plate 42 based on the voltage value output from the transmittance measuring module 14. Specifically, the voltage value output from the transmittance measuring module 14 is compared with the fouling determination threshold value, and it is determined whether or not the former is equal to or greater than the latter. As a result of this determination, when the former is equal to or greater than the latter, a stain detection signal is output to the alarm panel 2 and the green LED 162 is blinked. On the other hand, as a result of this determination, when the former is not more than the latter, the stain detection signal is not output and the green LED 162 is not blinked. The fouling detection unit 113 periodically executes this fouling detection process.

Next, the setting change unit 114 updates the alarm determination threshold information D2, the monitoring mask information D3, or the emissivity information D4 in response to a request from the maintenance PC3.
The above is the description of the temperature sensor 1.

1-2. Alarm board 2
The alarm panel 2 is a device that receives an abnormality detection signal from the temperature sensor 1 and outputs an alarm. FIG. 13 is a diagram showing the configuration of the alarm panel 2. The alarm panel 2 shown in the figure includes a main board 21 and a terminal board 22. In the figure, only one temperature sensor 1 is shown in order to avoid complicating the drawing.

The main board 21 included in the alarm panel 2 includes an I terminal, a C terminal, a DC terminal, an L terminal, and a DA terminal. The terminal board 22 includes an I terminal, a C terminal, a DC terminal, an A terminal, and a B terminal. In addition, it includes connectors CN1 and CN2. The sensor board 18 included in the temperature sensor 1 includes an I terminal, a C terminal, a DC terminal, an A terminal, a B terminal, an L terminal, and a DA terminal.

The I terminal of the main board 21 is connected to the I terminal of the sensor board 18 by the power supply line L1 via the I terminal of the terminal board 22 and the connector CN1. The temperature sensor 1 receives power from the alarm panel 2 through the power supply line L1.

The C terminal of the main board 21 is connected to the C terminal of the sensor board 18 by a signal line L2 via the C terminal of the terminal board 22 and the connector CN1. Further, the L terminal of the main board 21 is connected to the L terminal of the sensor board 18 by a signal line L3. The temperature sensor 1 outputs the above-mentioned abnormal temperature detection signal to the alarm panel 2 by short-circuiting the signal lines L2 and L3.

The DC terminal of the main board 21 is connected to the DC terminal of the sensor board 18 by a signal line L4 via the DC terminal of the terminal board 22 and the connector CN1. Further, the DA terminal of the main board 21 is connected to the DA terminal of the sensor board 18 by a signal line L5. The temperature sensor 1 outputs the above-mentioned pollution detection signal to the alarm panel 2 by short-circuiting the signal lines L4 and L5.

The connector CN2 of the terminal board 22 is connected to the A terminal of the sensor board 18 via the switch SW1 by the communication line L6 to the A terminal of the board. Further, the connector CN2 is connected to the B terminal of the sensor board 18 via the B terminal of the terminal board 22 and the switch SW2 by a communication line L7. The connector CN2 is exposed to the outside of the housing of the alarm panel 2, and a cable extending from the maintenance PC 3 is detachably connected to the connector CN2. The maintenance PC 3 connected to the connector CN2 can communicate with the temperature sensor 1 through the communication lines L6 and L7. Through this communication, the maintenance PC 3 can set various parameters stored in the temperature sensor 1. Further, the maintenance PC 3 can acquire and display the temperature information stored in the temperature sensor 1.

Although only one set of switches SW1 and SW2 on the terminal board 22 is shown in FIG. 13, one set is provided for each temperature sensor 1. The switches SW1 and SW2 can be turned on and off by a sensor changeover switch (for example, a rotary switch with 4 circuits and 2 contacts) (not shown). This sensor changeover switch is exposed to the outside of the housing of the alarm panel 2 and is operated by the user. The user can select the temperature sensor 1 connected to the maintenance PC 3 by operating this sensor changeover switch.

A processor, a memory, a speaker, and a plurality of indicator lights are mounted on the main board 21 of the alarm panel 2. Of these, the processor realizes a function called an alarm output unit by executing a processing program stored in the memory. When the alarm output unit receives an input of an abnormal temperature detection signal from the temperature sensor 1, it outputs an alarm sound from the speaker and turns on an indicator lamp for warning of abnormal temperature detection. By this alarm operation, the user can know the occurrence of a fire. Further, when the alarm output unit receives the input of the stain detection signal from the temperature sensor 1, the alarm output unit outputs an alarm sound from the speaker and turns on the indicator lamp for warning the stain detection. By this alarm operation, the user can know that the window plate 42 of the temperature sensor 1 is contaminated.
The above is the description of the alarm panel 2.

1-3. Maintenance PC3
The maintenance PC 3 is an information processing device for maintaining and inspecting the temperature sensor 1. For example, a notebook PC or a tablet terminal. FIG. 14 is a block diagram showing the configuration of the maintenance PC3. The maintenance PC 3 shown in the figure includes a processor 31, a memory 32, a display 33, an input device 34, and a communication module 35. Of these, the processor 31 executes various setting units 311, a monitoring mask setting unit 312, an emissivity setting unit 313, a temperature history display unit 314, and a real-time temperature display unit 315 by executing a processing program stored in the memory 32. To realize the function. This processing program stored in the memory 32 is a program that can be distributed via a non-temporary storage medium or a network such as the Internet.

Among the above functions, the various setting units 311 generate various setting screens and display them on the display 33. These various setting screens are screens for setting the alarm determination threshold information D2 of the temperature sensor 1. FIG. 15 is a diagram showing an example of the various setting screens. The various setting screens shown in the figure are the sensor number display field F1, the first alarm temperature input field F2, the first pixel number input field F3, the first frame number input field F4, the second alarm temperature input field F5, and the second pixel. Includes a number input field F6, a second frame number input field F7, and a stain determination threshold input field F8. Of these, the sensor number display field F1 displays the identification number of the temperature sensor 1 currently connected to the maintenance PC 3.

Further, the various setting screens include a setting initialization button B1, a sensor read button B2, and a sensor write button B3. Of these, the setting initialization button B1 is a button for setting initial values in the above input fields F2 to F8. The sensor read button B2 is a button for setting the alarm determination threshold information D2 of the currently connected temperature sensor 1 in the above input fields F2 to F8. When this button is selected, the various setting units 311 acquire the alarm determination threshold information D2 from the currently connected temperature sensor 1 and set it in the above input fields F2 to F8. Next, the sensor write button B3 is a button for writing the information set in the above input fields F2 to F8 to the temperature sensor 1 currently connected. When this button is selected, a write request including the information set in the above input fields F2 to F8 is transmitted to the temperature sensor 1 currently connected. The setting change unit 114 of the temperature sensor 1 that has received the write request stores the information included in the received write request in the memory 12 as the alarm determination threshold information D2.

Next, the monitoring mask setting unit 312 generates a monitoring mask setting screen and displays it on the display 33. This monitoring mask setting screen is a screen for setting the monitoring mask information D3 of the temperature sensor 1 currently connected. FIG. 16 is a diagram showing an example of this monitoring mask setting screen. The monitoring mask setting screen shown in the figure includes a sensor number display field F1 and a mask setting control C1. Of these, the mask setting control C1 is a GUI component for selecting the state (mask state or monitoring state) of each pixel.

Further, this monitoring mask setting screen includes an all-pixel mask button B4, a setting initialization button B5, a sensor read button B6, and a sensor write button B7. Of these, the all-pixel mask button B4 is a button for setting the state of all pixels to the mask state in the mask setting control C1. The setting initialization button B5 is a button for setting the states of all pixels to the initial values in the mask setting control C1. The sensor read button B6 is a button for reflecting the monitoring mask information D3 of the temperature sensor 1 currently connected to the mask setting control C1. When this button is selected, the monitoring mask setting unit 312 acquires the monitoring mask information D3 from the currently connected temperature sensor 1 and reflects it in the mask setting control C1. Next, the sensor write button B7 is a button for writing the information set in the mask setting control C1 to the temperature sensor 1 currently connected. When this button is selected, the monitoring mask setting unit 312 transmits a write request including the information set in the mask setting control C1 to the currently connected temperature sensor 1. The setting change unit 114 of the temperature sensor 1 that has received the write request stores the information included in the received write request in the memory 12 as the monitoring mask information D3.

Next, the emissivity setting unit 313 generates an emissivity setting screen and displays it on the display 33. This emissivity setting screen is a screen for setting the emissivity information D4 of the temperature sensor 1 currently connected. FIG. 17 is a diagram showing an example of this emissivity setting screen. The emissivity setting screen shown in the figure includes a sensor number display field F1, a radiation rate setting control C2, an emissivity input field F9, a decision button B8, and a batch setting button B9. Of these, the emissivity setting control C2 is a GUI component for selecting pixels for setting the emissivity. The decision button B8 is a button for reflecting the emissivity set in the emissivity input field F9 on the pixels selected in the emissivity setting control C2. The batch setting button B9 is a button for reflecting the emissivity set in the emissivity input field F9 on all pixels.

Further, this emissivity setting screen includes a setting initialization button B10, a sensor read button B11, and a sensor write button B12. Of these, the setting initialization button B10 is a button for setting the emissivity of all pixels to the initial value in the emissivity setting control C2. The sensor read button B11 is a button for reflecting the emissivity information D4 of the temperature sensor 1 currently connected to the emissivity setting control C2. When this button is selected, the emissivity setting unit 313 acquires the emissivity information D4 from the temperature sensor 1 currently connected and reflects it in the emissivity setting control C2. Next, the sensor write button B12 is a button for writing the information set in the emissivity setting control C2 to the temperature sensor 1 currently connected. When this button is selected, the emissivity setting unit 313 transmits a write request including the information set in the emissivity setting control C2 to the temperature sensor 1 currently connected. The setting change unit 114 of the temperature sensor 1 that has received the write request stores the information included in the received write request in the memory 12 as the emissivity information D4.

Next, the temperature history display unit 314 generates a temperature history display screen and displays it on the display 33. This temperature history display screen is a screen for displaying the temperature information group D1 of the temperature sensor 1 currently connected. FIG. 18 is a diagram showing an example of this temperature history display screen. The temperature history display screen shown in the figure includes a sensor number display field F1 and a temperature history display field F10. Of these, in the temperature history display column F10, temperature information for a predetermined period is displayed in chronological order for each pixel.

Further, this temperature history display screen includes an update button B13 and a save button B14. Of these, the update button B13 is a button for updating the temperature history display field F10 to the latest information. When this button is selected, the temperature history display unit 314 acquires the temperature information for the latest predetermined period from the currently connected temperature sensor 1 and reflects it in the temperature history display field F10. Next, the save button B14 is a button for saving the temperature information displayed in the temperature history display field F10 to a file.

Next, the real-time temperature display unit 315 generates a real-time temperature display screen and displays it on the display 33. This real-time temperature display screen is a screen for displaying the temperature information generated by the currently connected temperature sensor 1 in real time. FIG. 19 is a diagram showing an example of this real-time temperature display screen. The real-time temperature display screen shown in the figure includes a sensor number display field F1, a current value display field F11, and a maximum value display field F12. Of these, the temperature of each pixel is displayed in the current value display column F11. The color of each pixel changes according to its temperature, and the masked pixel is displayed in gray. Next, the maximum value of the temperature of each pixel is displayed in the maximum value display column F12. The color of each pixel changes according to its temperature, and the masked pixel is displayed in gray. The maximum value referred to here is the maximum value of the temperature measured during the display of the real-time temperature display screen.

Further, this real-time temperature display screen includes a communication start button B15 and a recovery button B16. Of these, the communication start button B15 is a button for switching between starting and stopping the automatic update of the screen. When this button is selected, the real-time temperature display unit 315 sequentially acquires the latest temperature information from the currently connected temperature sensor 1 and reflects it in the current value display field F11 and the maximum value display field F12. The caption of the communication start button B15 is switched from "communication start" to "communication stop" in the state of communication. Then, when the communication start button B15 is selected again during communication, the real-time temperature display unit 315 stops the automatic update of the current value display field F11 and the maximum value display field F12. After the automatic update is stopped, the caption of the communication start button B15 returns to "communication start" again.

Next, the recovery button B16 is a button for transmitting a recovery instruction to the temperature sensor 1 currently connected. When this button is selected, the real-time temperature display unit 315 transmits a recovery instruction to the currently connected temperature sensor 1.
The above is the description of the maintenance PC3.

According to the temperature sensor system described above, the user can set various parameters stored in each temperature sensor 1 by connecting the maintenance PC 3 to the connector CN2 of the alarm panel 2. That is, the user can set various parameters of all the temperature sensors 1 simply by going to the place where the alarm panel 2 is installed.

2. Modification Example The above embodiment may be modified as follows. The modifications described below may be combined with each other.

2-1. Modification 1
The number of pixels of the infrared array sensor 13 is not limited to 8 × 8 pixels. For example, it may be 16 × 16 pixels.

2-2. Modification 2
The shape and height of the geta portion 51 may be appropriately changed depending on the installation location and the monitoring target.

2-3. Modification 3
The shape of the sensor box 52 may be appropriately changed according to the installation location.

2-4. Modification 4
A part or all of the functions realized by the processor 11 of the temperature sensor 1 may be realized by the processor of the alarm panel 2.

2-5. Modification 5
The maintenance PC 3 may further include a function called a setting change history display unit. This setting change history display unit is a function for displaying the history of setting changes made by the temperature sensor 1 on the display 33. This setting change history display unit acquires the setting change history information from the temperature sensor 1 connected to the maintenance PC 3. This setting change history information is information indicating the history of setting changes made by the temperature sensor 1, and is stored in the memory 12 of the temperature sensor 1. When the setting change history display unit acquires the setting change history information, the setting change history display unit generates a setting change history display screen based on this information and displays it on the display 33. This setting change history display screen includes a list in which setting changes are arranged in chronological order.

Further, the maintenance PC 3 may further have a function of a maximum temperature log display unit. This maximum temperature log display unit is a function for displaying the maximum temperature log on the display 33. This maximum temperature log display unit acquires temperature information for the latest predetermined period from the temperature sensor 1 connected to the maintenance PC 3. Then, the maximum temperature log display screen is generated based on the acquired temperature information and displayed on the display 33. The maximum temperature log display screen includes a list in which temperatures are arranged in descending order in association with their pixel numbers and measurement dates.

2-6. Modification 6
The application target of the above temperature sensor system is not limited to the conveyor for transporting garbage. Another application is coal conveyors. In a coal conveyor, the rollers of the conveyor are considered as a heat source, and coal powder is considered as an igniter. When this coal conveyor is applied, the temperature sensor 1 is installed so as to monitor the vicinity of the rollers of the conveyor.

Another application target is automatic machine tools. In automatic machine tools, rotating parts and cutting parts are considered as heat sources, and accumulated chips are considered as igniters. When this automatic machine tool is applied, the temperature sensor 1 is installed so as to monitor the machined portion of the part.

1 ... Temperature sensor, 2 ... Alarm panel, 3 ... Maintenance PC, 11 ... Processor, 12 ... Memory, 13 ... Infrared array sensor, 14 ... Transmission measurement module, 15 ... Housing temperature sensor, 16 ... Indicator light, 17 ... communication module, 18 ... sensor board, 21 ... main board, 22 ... terminal board, 31 ... processor, 32 ... memory, 33 ... display, 34 ... input device, 35 ... communication module, 41 ... housing, 42 ... window board , 43 ... Reflector, 51 ... Getter part, 52 ... Sensor box, 53 ... Conveyor belt, 54 ... Conveyor duct, 61 ... Sensor box, 62 ... Conveyor belt, 63 ... Conveyor duct, 111 ... Temperature calculation unit, 112 ... Abnormality Temperature detection unit, 113 ... Stain detection unit, 114 ... Setting change unit, 141 ... Light source, 142 ... Light receiving element, 161 ... Red LED, 162 ... Green LED, 311 ... Various setting units, 312 ... Monitoring mask setting unit, 313 ... Radiation rate setting unit, 314 ... Temperature history display unit, 315 ... Real-time temperature display unit, 411 ... Front plate, 412 ... Opening, 511 ... Side plate, 512 ... Inspection door, 513 ... Lid, 514 ... Through hole, 521 ... Lid plate, 522 ... bottom plate, 523 ... through hole, 541 ... top plate, 542 ... opening, 611 ... lid plate, 612 ... grip portion, 613 ... bottom plate, 614 ... through hole, 631 ... top plate, 632 ... through hole , B1 ... setting initialization button, B2 ... sensor read button, B3 ... sensor write button, B4 ... all pixel mask button, B5 ... setting initialization button, B6 ... sensor read button, B7 ... sensor write button, B8 ... Enter button, B9 ... Batch setting button, B10 ... Setting initialization button, B11 ... Sensor read button, B12 ... Sensor write button, B13 ... Update button, B14 ... Save button, B15 ... Communication start button, B16 ... Recovery button, C1 ... Mask setting control, C2 ... Radiation rate setting control, CA1, CA2 ... Counter, CN1, CN2 ... Connector, D1 ... Temperature information group, D2 ... Alarm judgment threshold information, D3 ... Monitoring mask information, D4 ... Radiation rate information, F1 ... Sensor number display field, F2 ... 1st alarm temperature input field, F3 ... 1st pixel number input field, F4 ... 1st frame number input field, F5 ... 2nd alarm temperature input field, F6 ... 2nd pixel number input Field, F7 ... 2nd frame number input field, F8 ... Contamination judgment threshold input field, F9 ... Radiation rate input field, F10 ... Temperature history display field, F11 ... Current value display field, F12 ... Maximum value display field, L1 ... Power supply Line, L2, L3, L4, L5 ... Signal line, L6, L7 ... Communication line, SW1, SW2 ... Switch

Claims (4)

The monitoring area is divided into a plurality of pixels, the temperature is periodically measured for each of the divided plurality of pixels, and when it is detected that the measurement result matches the pre-stored conditions, an abnormal temperature detection signal is output. Infrared temperature sensor to output and
It is equipped with an alarm panel that is connected to the infrared temperature sensor and outputs an alarm when the abnormal temperature detection signal is received.
The alarm panel is a connector to which another information processing device is detachably connected, and a connector that enables the other information processing device to communicate with the infrared temperature sensor to set the conditions. A temperature sensor system characterized by being provided. The connector further enables the other information processing device to communicate with the infrared temperature sensor to acquire and display information indicating the temperature measured by the infrared temperature sensor. , The temperature sensor system according to claim 1. The temperature sensor system according to claim 1 or 2.
A geta portion that is tubular and has a first through hole in the lid, and is installed so as to cover an opening formed in the upper plate of a duct that covers the circumference of the conveyor belt.
It is a sensor box having a second through hole at the bottom, and includes a sensor box installed on the lid portion of the geta portion so that the second through hole communicates with the first through hole.
The conveyor temperature monitoring equipment is characterized in that the infrared temperature sensor is housed in the sensor box so that the inside of the conveyor belt can be monitored through the first through hole, the second through hole, and the opening. The temperature sensor system according to claim 1 or 2.
The first through hole is formed in the second through hole formed in the upper plate of the duct which is a sensor box in which the lid plate is inclined with respect to the bottom plate and has the first through hole in the bottom plate. Equipped with a sensor box that is installed so that
The infrared temperature sensor is attached to the inner surface of the lid plate so that the conveyor belt can be monitored through the first through hole and the second through hole.
The sensor box is a conveyor temperature monitoring device, characterized in that the infrared temperature sensor is installed on the upper plate of the duct so that the infrared temperature sensor can be monitored on the conveyor belt from diagonally rearward with respect to the transport direction. ..

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