JP7381383B2 - Temperature sensor system and conveyor temperature monitoring equipment - Google Patents

Description

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

2. Description of the Related Art Conventionally, there has been known a device that detects the occurrence of a fire by detecting a high-temperature object using an infrared sensor (for example, see Patent Document 1).

Japanese Patent Application Publication No. 2004-99264

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

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

In order to solve the above problems, a temperature sensor system according to the present invention divides a monitoring area into a plurality of pixels, periodically measures the temperature of each of the divided pixels, and stores the measurement results in advance. an infrared temperature sensor that outputs an abnormal temperature detection signal when it detects that the specified 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 which enables the other information processing device to communicate with the infrared temperature sensor and set the conditions. It is characterized by being prepared.

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

Further, the conveyor temperature monitoring equipment according to the present invention includes the temperature sensor system and a getter part that is in the shape of a covered cylinder and has a first through hole in the lid part, and is formed on the upper plate of the duct that covers the periphery of the conveyor belt. The sensor box has a getter part installed to cover an opening, and a second through hole at the bottom, and the lid of the getter part is arranged such that the second through hole communicates with the first through hole. a sensor box installed on the conveyor belt, and the infrared temperature sensor is installed in the sensor box so that it can monitor the conveyor belt through the first through hole, the second through hole, and the opening. It is characterized by being accommodated.

Further, another conveyor temperature monitoring equipment according to the present invention is a sensor box including the temperature sensor system, a lid plate inclined with respect to a bottom plate, and a first through hole in the bottom plate, which covers the periphery of the conveyor belt. and a sensor box installed so that the first through hole communicates with a second through hole formed in an upper plate of the covering duct, and the infrared temperature sensor is connected to the first through hole and the second through hole. The sensor box 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 is configured so that the infrared temperature sensor can monitor the top of the conveyor belt from diagonally rearward with respect to the conveyance direction. Preferably, it is installed on the upper plate of the duct.

According to the present invention, it becomes easy to change the settings of an infrared sensor used in a temperature sensor system.

Diagram showing the configuration of the temperature sensor system A perspective view showing the appearance of the temperature sensor 1 Block diagram showing the internal configuration of temperature sensor 1 A diagram showing a mechanism for detecting contamination of the window plate 42. Perspective view of equipment for installing temperature sensor 1 Cross-sectional view taken along line AA in Figure 5 BB line sectional view in Figure 5 Diagram showing equipment for installing temperature sensor 1 Perspective view of sensor box 61 Cross-sectional view taken along line CC in Figure 9 Flow diagram showing temperature calculation process Flow diagram showing abnormal temperature detection processing Diagram showing the configuration of 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 surveillance mask setting screen Diagram showing 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. Embodiment A temperature sensor system according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing the configuration of a temperature sensor system according to this embodiment. The temperature sensor system shown in the figure is a system for detecting abnormal temperature in a monitoring area and outputting an alarm. This temperature sensor system includes four temperature sensors 1 installed at different locations, 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. Each component will be explained below.

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

As shown in FIG. 2, this temperature sensor 1 has a substantially rectangular parallelepiped-shaped casing 41, and a substantially rectangular opening 412 is formed in the center of a front plate 411 of the casing 41. As shown in FIG. Further, a window plate 42 made of silicon is attached to the back surface of the front plate 411 of the housing 41 so as to close the opening 412. Further, a reflective plate 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, inside the casing 41 of the temperature sensor 1 are a processor 11, a memory 12, an infrared array sensor 13, a transmittance measurement module 14, an in-casing temperature sensor 15, an indicator light 16, and a communication module 17. It is accommodated.

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

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

Among 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 date and time of measurement of the temperature.

The alarm determination threshold information D2 is information indicating a threshold for outputting an abnormality detection signal. Specifically, it consists of an abnormal temperature determination threshold and a contamination determination threshold. Among these, the abnormal temperature determination threshold is information indicating a threshold for outputting an abnormal temperature detection signal. On the other hand, the stain determination threshold is information indicating a threshold for outputting a stain detection signal.

The abnormal temperature determination threshold is further divided into an absolute value determination threshold and a relative value determination threshold. Among these, the absolute value determination threshold is information on a temperature threshold defined by an absolute temperature and referred to when this absolute temperature is compared with a measured temperature. Specifically, it consists of a first alarm temperature (absolute value), a first number of pixels, and a first number of frames. On the other hand, the relative value determination threshold is information on a temperature threshold that is defined as a relative temperature with respect to a measured temperature in a steady state, and is referred to when this relative temperature is compared with the measured temperature. Specifically, it consists of the second alarm temperature (relative value), the second number of pixels, and the second number of frames.
The alarm determination threshold information D2 described above is set by the user using the maintenance PC 3.

The monitoring mask information D3 is information indicating pixels to be masked. The temperature is not calculated for the pixel indicated by this monitoring mask information D3. This monitoring mask information D3 is set by the user using the maintenance PC 3.

The emissivity information D4 is information indicating the emissivity of each pixel. This emissivity information D4 is set by the user using the maintenance PC 3.

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

The transmittance measurement module 14 is a component for measuring the light transmittance (in other words, the degree of contamination) of the window plate 42. This 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 contamination of the window plate 42. As shown in FIG. In the mechanism shown in the figure, light emitted from a light source 141 is reflected by a reflecting plate 43 after passing through a window plate 42 . The reflected light passes through the window plate 42 and enters the light receiving element 142. The light receiving element 142 on which this reflected light is incident outputs a voltage value corresponding to the light transmittance of the window plate 42 (in other words, the degree of contamination).

Next, the in-casing temperature sensor 15 is a sensor for measuring the temperature inside the casing 41.

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

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 a device for installing the temperature sensor 1. FIG. 6 is a cross-sectional view taken along line AA in FIG. FIG. 7 is a sectional view taken along line BB in FIG.

The conveyor belt 53 shown in these figures is a conveyor belt installed in a waste treatment facility for conveying garbage. Among the garbage conveyed by the conveyor belt 53, there is garbage (for example, batteries) that can be crushed and ignited. If such garbage ignites and ignites surrounding combustible materials, a fire will occur on the conveyor belt 53. The temperature sensor 1 described above is installed in the conveyor duct 54 surrounding the conveyor belt 53 in order to detect the occurrence of such a fire.

As instruments for installing the temperature sensor 1 in the conveyor duct 54, there is a getter part 51 and a sensor box 52. Of these, the getter portion 51 has a square tube shape with a lid and is installed on a rectangular conveyor duct 54. The upper plate 541 of the conveyor duct 54 on which the getter part 51 is installed has an opening 542 of approximately the same size as the opening of the getter part 51, and the getter part 51 is installed so as to cover this opening 542. be done. A rectangular inspection door 512 that can be opened and closed is provided on the side plate 511 of the getter 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 the conveyor belt 53 is formed approximately at the center of the lid portion 513 of the getter portion 51.

On the other hand, the sensor box 52 has a rectangular parallelepiped shape and houses the temperature sensor 1. A lid plate 521 of this sensor box 52 can be opened and closed, and the temperature sensor 1 is attached to this 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. This sensor box 52 is installed on the lid part 513 of the getter part 51 so that the through hole 523 and the through hole 514 of the geter part 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 getter portion 51 in addition to the sensor box 52 that houses the temperature sensor 1. By inserting this getter 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 longer. As a result, it is possible to prevent dust splashed on the conveyor belt 53 from hitting the window plate 42 of the temperature sensor 1 and damaging it. Furthermore, the monitoring area of the temperature sensor 1 can be expanded compared to the case shown in FIG. 8 in which the getter portion 51 is not used. In the sectional view shown in FIG. 8, the upper corner of the conveyor duct 54 is a blind spot, but in the sectional view shown in FIG. 7, the blind spot is small. Furthermore, by inserting the getter portion 51, the user can open the inspection door 512 and inspect the top of the conveyor belt 53.
The equipment including the getter part 51, the sensor box 52, and the temperature sensor system described above is referred to as 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 a sensor box 61 for housing the temperature sensor 1. FIG. 10 is a sectional view taken along line CC in FIG.

The conveyor belt 62 shown in these figures is a conveyor belt for conveying garbage, similar to the above-mentioned conveyor belt 53. In order to detect a fire occurring on the conveyor belt 62, a sensor box 61 containing the temperature sensor 1 is installed in a conveyor duct 63 that surrounds the conveyor belt 62.

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

This 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 this time, the temperature sensor 1 monitors the conveyor belt 62 from diagonally rearward with respect to the conveyance direction. Therefore, it is possible to prevent dust splashed forward on the conveyor belt 62 from colliding with 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 conveyor temperature monitoring equipment.

Next, the functions realized by the processor 11 of the temperature sensor 1 will be explained. As shown in FIG. 3, the processor 11 of the temperature sensor 1 realizes the functions of a temperature calculation section 111, an abnormal temperature detection section 112, a contamination detection section 113, and a setting change section 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 diagram showing this temperature calculation process. The temperature calculation unit 111 first obtains a voltage value corresponding to the amount of infrared rays detected for each pixel from the infrared array sensor 13 (step Sa1). After acquiring the voltage value, the temperature of each pixel is calculated by substituting the voltage value and emissivity of the pixel and a predetermined correction coefficient into a predetermined formula (step Sa2). Here, the emissivity is specified for each pixel with reference to the emissivity information D4. Once the temperature is calculated, temperature information consisting of the calculated temperature of each pixel and the date and time of measurement of the temperature is stored in the memory 12 (step Sa3).
The above is an explanation of the temperature calculation process. This temperature calculation process is executed periodically, and temperature information is stored in the memory 12 in chronological order.

Note that in the temperature calculation process described above, temperature calculation is omitted for the pixel indicated by the monitoring mask information D3.

Next, the abnormal temperature detection section 112 refers to the temperature information group D1 calculated by the temperature calculation section 111 and stored in the memory 12 to detect abnormal temperature. FIG. 12 is a flow diagram showing this abnormal temperature detection process. The abnormal temperature detection unit 112 first obtains unobtained temperature information with the oldest measurement date and time from the memory 12 (step Sb1). After acquiring the temperature information, the number of pixels having a temperature equal to or higher than the first alarm temperature (absolute value) is specified with reference to the acquired temperature information (step Sb2). Once the number of pixels is specified, it is determined whether the specified number is greater than or equal to the first number of pixels (step Sb3). As a result of this determination, if the identified number is greater than or equal to the first number of 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, as a result of this determination, if the specified number is not equal to or greater than the first number of pixels (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 the count value of counter CA1 is equal to or greater than the first frame number. As a result of this determination, if the count value of the counter CA1 is equal to or greater than the first frame number (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 advances 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 first frame number (NO in step Sb6), the process proceeds to step Sb8.

According to steps Sb1 to Sb7 described above, when temperature information including a first number of pixels or more of pixels having a temperature equal to or higher than the first alarm temperature continues for a first number of frames or more, an abnormal temperature detection signal is output. By appropriately setting each threshold value for outputting this abnormal temperature detection signal according to the monitoring target and the monitoring environment, it is possible to suppress erroneous detection of abnormal temperature. For example, by setting the first frame number to 2 or more, an abnormal temperature detection signal can be output only when abnormal temperature is detected two or more times in a row for one object moving on the conveyor belt. Can be done.

Next, in step Sb8, a threshold temperature is calculated by adding the average temperature within the housing to the second alarm temperature (relative value). Here, the average internal temperature within the housing is the average value of temperatures measured by the internal housing temperature sensor 15 within the most recent predetermined period. Information indicating this average temperature within the housing is stored in the memory 12 and periodically updated. After calculating the threshold temperature, the abnormal temperature detection unit 112 refers to the temperature information acquired in step Sb1 and identifies the number of pixels whose temperature is equal to or higher than the threshold temperature (step Sb9). Once the number of pixels is specified, it is determined whether the specified number is greater than or equal to the second number of pixels (step Sb10). As a result of this determination, if the identified number is greater than or equal to the second number of 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 second number of 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 the count value of counter CA2 is equal to or greater than the second frame number. As a result of this determination, if the count value of the counter CA2 is equal to or greater than the second frame number (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 counter CA2 is not equal to or greater than the second frame number (NO in step Sb13), the process returns to step Sb1.

According to steps Sb8 to Sb14 described above, when temperature information including a second number of pixels or more of pixels having a temperature equal to or higher than the threshold temperature continues for a second number of frames or more, an abnormal temperature detection signal is output. By appropriately setting each threshold value for outputting this abnormal temperature detection signal according to the monitoring target and the monitoring environment, it is possible to suppress erroneous detection of abnormal temperature.
The above is a description of the abnormal temperature detection process.

Next, the stain detection unit 113 detects stains on the window plate 42 based on the voltage value output from the transmittance measurement module 14 . Specifically, the voltage value output from the transmittance measurement module 14 is compared with a contamination determination threshold, and it is determined whether the former is greater than or equal to the latter. As a result of this determination, if the former is greater than or equal to the latter, a contamination detection signal is output to the alarm panel 2, and the green LED 162 is made to blink. On the other hand, as a result of this determination, if the former is not greater than or equal to the latter, the contamination detection signal is not output and the green LED 162 is not blinked. The stain detection unit 113 periodically executes this stain 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 PC 3.
The above is a description of the temperature sensor 1.

1-2. Alarm panel 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 this alarm panel 2. The alarm panel 2 shown in the figure includes a main board 21 and a terminal board 22. In addition, in the figure, only one temperature sensor 1 is shown 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, connectors CN1 and CN2 are provided. The sensor substrate 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 a power 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 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 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 contamination 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 communication line L6 via the A terminal of the board and the switch SW1. Further, this 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 via the communication line L7. This connector CN2 is exposed outside the casing of the alarm panel 2, and a cable extending from the maintenance PC 3 is detachably connected to this connector CN2. The maintenance PC 3 connected to this connector CN2 can communicate with the temperature sensor 1 through communication lines L6 and L7. Through this communication, the maintenance PC 3 can set various parameters stored in the temperature sensor 1. Furthermore, the maintenance PC 3 can acquire and display 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 controlled on and off by a sensor changeover switch (for example, a four-circuit, two-contact rotary switch) not shown. This sensor changeover switch is exposed outside the casing of the alarm panel 2 and is operated by the user. By operating this sensor changeover switch, the user can select the temperature sensor 1 to be connected to the maintenance PC 3.

The main board 21 of the alarm panel 2 is equipped with a processor, a memory, a speaker, and a plurality of indicator lights. Among these, the processor realizes the function of an alarm output section by executing a processing program stored in the memory. When this alarm output section receives an abnormal temperature detection signal from the temperature sensor 1, it outputs an alarm sound from a speaker and turns on an indicator light to warn of abnormal temperature detection. This alarm operation allows the user to know that a fire has occurred. Further, upon receiving the contamination detection signal from the temperature sensor 1, the alarm output section outputs an alarm sound from the speaker and turns on an indicator light to warn of contamination detection. This alarm operation allows the user to know that the window plate 42 of the temperature sensor 1 is soiled.
The above is the explanation about the alarm panel 2.

1-3. Maintenance PC3
The maintenance PC 3 is an information processing device for performing maintenance and inspection on the temperature sensor 1. For example, it is a notebook PC or a tablet terminal. FIG. 14 is a block diagram showing the configuration of this maintenance PC 3. As shown in FIG. 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. Among these, the processor 31 executes a processing program stored in the memory 32 to control various setting sections 311, monitoring mask setting section 312, emissivity setting section 313, temperature history display section 314, and real-time temperature display section 315. Achieve this function. Note that 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 section 311 generates various setting screens and displays them on the display 33. This various setting screen is a screen for setting alarm determination threshold information D2 of the temperature sensor 1. FIG. 15 is a diagram showing an example of this various setting screen. The various setting screens shown in the figure are sensor number display field F1, first alarm temperature input field F2, first pixel number input field F3, first frame number input field F4, second alarm temperature input field F5, and second pixel number input field F3. It includes a number input field F6, a second frame number input field F7, and a stain determination threshold value input field F8. Among these, the identification number of the temperature sensor 1 currently connected to the maintenance PC 3 is displayed in the sensor number display field F1.

Further, this various setting screen includes a settings initialization button B1, a sensor read button B2, and a sensor write button B3. Among these, the settings initialization button B1 is a button for setting initial values in the input fields F2 to F8. The sensor read button B2 is a button for setting the alarm judgment threshold information D2 of the currently connected temperature sensor 1 in the input fields F2 to F8. When this button is selected, the various setting section 311 acquires the alarm determination threshold information D2 from the currently connected temperature sensor 1, and sets it in the input fields F2 to F8 described above. Next, the sensor write button B3 is a button for writing the information set in the above input fields F2 to F8 to the currently connected temperature sensor 1. When this button is selected, a write request containing the information set in the input fields F2 to F8 is sent to the currently connected temperature sensor 1. The setting change unit 114 of the temperature sensor 1 that has received this write request stores the information included in the received write request in the memory 12 as alarm determination threshold information D2.

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

Further, this monitoring mask setting screen includes an all pixel mask button B4, a settings initialization button B5, a sensor read button B6, and a sensor write button B7. Among 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 settings initialization button B5 is a button for setting the states of all pixels to 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 currently connected temperature sensor 1 on 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 causes it to be reflected 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 currently connected temperature sensor 1. 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 this write request stores the information included in the received write request in the memory 12 as 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 emissivity information D4 of the currently connected temperature sensor 1. 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, an emissivity setting control C2, an emissivity input field F9, a determination button B8, and a batch setting button B9. Among these, the emissivity setting control C2 is a GUI component for selecting the pixel for which the emissivity is to be set. The enter button B8 is a button for reflecting the emissivity set in the emissivity input field F9 on the pixel 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 to all pixels.

This emissivity setting screen also includes a settings initialization button B10, a sensor read button B11, and a sensor write button B12. Among these, the settings 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 currently connected temperature sensor 1 on the emissivity setting control C2. When this button is selected, the emissivity setting unit 313 acquires the emissivity information D4 from the currently connected temperature sensor 1, and causes the emissivity information D4 to be reflected 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 currently connected temperature sensor 1. 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 currently connected temperature sensor 1. The setting change unit 114 of the temperature sensor 1 that has received this write request stores the information included in the received write request in the memory 12 as 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 currently connected temperature sensor 1. 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. Among these, temperature information for a predetermined period is displayed in time series for each pixel in the temperature history display field F10.

Further, this temperature history display screen includes an update button B13 and a save button B14. Among 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 most recent 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 into a file.

Next, the real-time temperature display section 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 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. Among these, the temperature of each pixel is displayed in the current value display field F11. Each pixel changes color depending on its temperature, and pixels in a masked state are displayed in gray. Next, the maximum value of the temperature of each pixel is displayed in the maximum value display column F12. Each pixel changes color depending on its temperature, and pixels in a masked state are displayed in gray. Note that the maximum value here refers to the maximum value of the temperature measured while the real-time temperature display screen is displayed.

Further, this real-time temperature display screen includes a communication start button B15 and a recovery button B16. Among these, the communication start button B15 is a button for switching between starting and stopping automatic updating 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 this communication start button B15 changes from "communication start" to "communication stop" when communication is in progress. When the communication start button B15 is selected again during communication, the real-time temperature display section 315 stops automatic updating of the current value display field F11 and the maximum value display field F12. After the automatic update is stopped, the caption of this communication start button B15 returns to "communication start" again.

Next, the recovery button B16 is a button for transmitting a recovery instruction to the currently connected temperature sensor 1. When this button is selected, the real-time temperature display section 315 transmits a recovery instruction to the currently connected temperature sensor 1.
The above is the explanation about the maintenance PC 3.

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 for all temperature sensors 1 simply by going to the location where the alarm panel 2 is installed.

2. Modifications The above embodiment may be modified as follows. The variants described below may be combined with each other.

2-1. Modification example 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 example 2
The shape and height of the getter portion 51 may be changed as appropriate depending on the installation location and the object to be monitored.

2-3. Modification example 3
The shape of the sensor box 52 may be changed as appropriate depending on its installation location.

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

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

Moreover, the maintenance PC 3 may further include a function of a maximum temperature log display section. This maximum temperature log display section is a function for displaying a maximum temperature log on the display 33. This maximum temperature log display section acquires temperature information for the most recent predetermined period from the temperature sensor 1 connected to the maintenance PC 3. Then, a maximum temperature log display screen is generated based on the acquired temperature information and displayed on the display 33. This 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 and times.

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

Another application is automatic machine tools. In automatic machine tools, rotating parts and cutting parts are considered to be heat sources, and accumulated chips are considered to be ignitable materials. When this automatic machine tool is applied, the temperature sensor 1 is installed to monitor the processing location of the part.

DESCRIPTION OF SYMBOLS 1...Temperature sensor, 2...Alarm panel, 3...Maintenance PC, 11...Processor, 12...Memory, 13...Infrared array sensor, 14...Transmittance measurement module, 15...Temperature sensor inside the housing, 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...Casing, 42...Window plate , 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 section, 112...Abnormality Temperature detection section, 113... Contamination detection section, 114... Setting change section, 141... Light source, 142... Light receiving element, 161... Red LED, 162... Green LED, 311... Various setting sections, 312... Monitoring mask setting section, 313... Emissivity setting section, 314...Temperature history display section, 315...Real-time temperature display section, 411...Front plate, 412...Opening section, 511...Side plate, 512...Inspection door, 513...Lid section, 514...Through hole, 521... Lid plate, 522... Bottom plate, 523... Through hole, 541... Top plate, 542... Opening, 611... Lid plate, 612... Gripping part, 613... Bottom plate, 614... Through hole, 631... Top plate, 632... Through hole , B1...Settings initialization button, B2...Sensor read button, B3...Sensor write button, B4...All pixel mask button, B5...Settings initialization button, B6...Sensor read button, B7...Sensor write button, B8... Confirm 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...Restore button, C1...mask setting control, C2...emissivity setting control, CA1, CA2...counter, CN1, CN2...connector, D1...temperature information group, D2...alarm judgment threshold information, D3...monitoring mask information, D4...emissivity information, F1...sensor number display field, F2...first alarm temperature input field, F3...first pixel number input field, F4...first frame number input field, F5...second alarm temperature input field, F6...second pixel number input field, F7...Second frame number input field, F8...Contamination judgment threshold input field, F9...Emissivity 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 (5)

Divide the monitoring area into multiple pixels, periodically measure the temperature of each of the divided pixels, and generate an abnormal temperature detection signal when it is detected that the measurement result matches a pre-stored condition. An infrared temperature sensor that outputs
an alarm panel connected to the infrared temperature sensor and outputting an alarm when receiving the abnormal temperature detection signal;
The alarm panel is a connector to which another information processing device is detachably connected, and which enables the other information processing device to communicate with the infrared temperature sensor and set the conditions. Prepare ,
The infrared temperature sensor measures the temperature of each pixel using the emissivity of each of the plurality of pixels,
The temperature sensor system is characterized in that the connector further enables the other information processing device to perform the communication with the infrared temperature sensor and set the emissivity for each pixel. The connector further enables the other information processing device to communicate with the infrared temperature sensor to obtain and display information indicating the temperature measured by the infrared temperature sensor. , The temperature sensor system according to claim 1. The connector further enables the other information processing device to perform the communication with the infrared temperature sensor to set pixels to be masked,
3. The temperature sensor system according to claim 1, wherein the infrared temperature sensor does not measure the temperature of the masked pixels. The temperature sensor system according to any one of claims 1 to 3 ,
a geta part that is cylindrical with a lid and has a first through hole in the lid part, and is installed so as to cover an opening formed in an upper plate of a duct that covers the periphery of the conveyor belt;
a sensor box having a second through hole at the bottom, the sensor box being installed on the lid part of the getter part 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 as to be able to monitor the conveyor belt through the first through hole, the second through hole, and the opening. The temperature sensor system according to any one of claims 1 to 3 ,
A sensor box in which a lid plate is inclined with respect to a bottom plate and has a first through hole in the bottom plate, and the first through hole is formed in the second through hole formed in the upper plate of the duct that covers the periphery of the conveyor belt. and a sensor box installed so that the two communicate with each other,
The infrared temperature sensor is attached to the inner surface of the lid plate so as to be able to monitor the conveyor belt through the first through hole and the second through hole,
The conveyor temperature monitoring equipment is characterized in that the sensor box is installed on the upper plate of the duct so that the infrared temperature sensor can monitor the conveyor belt from diagonally rearward with respect to the conveyance direction. .

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