JP7238858B2 - Temperature abnormality monitoring device, traveling vehicle system, and temperature abnormality monitoring method - Google Patents

Description

The present invention relates to a temperature abnormality monitoring device, a traveling vehicle system, and a temperature abnormality monitoring method.

2. Description of the Related Art Conventionally, in a track-guided vehicle system (traveling vehicle system), a technique for non-contactly supplying power to a carrier traveling on a rail is known. The non-contact power feeding equipment is composed of a power supply device, two power feeding cables, and a power receiving unit. A power supply cable is laid along the rail. The power receiving unit is attached to the carriage and receives power from the high-frequency current flowing through the power supply cable without contact. The power supply cable is fixed to a terminal block such as a busbar.

JP 2008-104245 A

Patent Document 1 mentions the possibility of heat generation due to an increase in contact resistance or the like in the vicinity of a connection portion where a power supply cable is connected to a terminal block. This system detects temperature abnormalities in the vicinity of the connection between the power supply cable and the terminal block.

Heat generation in the terminal block, which is the connection portion of the electric circuit of the power supply system, can be caused by various causes. If abnormal heat generation occurs and progresses, there is a risk of burnout or the like. When abnormal heat generation occurs, it is necessary to stop the power supply to the terminal, remove the cause by the operator, and then restart the power supply. The measures to be taken by the operator differ depending on the cause. For example, when vibration is included in the cause of heat generation, countermeasures such as anti-vibration measures can be considered. Conventionally, when heat generation is detected, it has been difficult for the system to identify the cause of heat generation. Therefore, it was difficult to quickly take appropriate measures.

SUMMARY OF THE INVENTION An object of the present invention is to provide a temperature abnormality monitoring device, a traveling vehicle system, and a temperature abnormality monitoring method that can quickly take appropriate measures by identifying the cause of heat generation.

One aspect of the present invention is a temperature abnormality monitoring device for monitoring temperature abnormality of a terminal block, in which the temperature of the terminal block is acquired in correspondence with time, and based on the relationship between the temperature and time, the cause of the temperature rise is identified. Determine whether vibration is included.

According to the study of the present inventors, the cause of the temperature rise of the terminal block can be estimated by observing how the temperature of the terminal block changes with time. When vibration is included in the temperature rise of the terminal block, the temporal change in temperature of the terminal block shows a specific trend. According to this temperature abnormality monitoring device, by determining whether or not vibration is the cause of the temperature rise based on the relationship between the temperature of the terminal block and time, it is determined that at least the vibration is the cause of the heat generation. In some cases, the cause can be identified. Therefore, for example, it is possible to quickly take appropriate measures such as stopping the system that is the source of the vibration, or taking anti-vibration measures by the operator.

The terminal block may be included in a power supply device for supplying power to the traveling vehicle. In a traveling vehicle system, abnormal heat generation in a terminal block of a power supply device hinders the running of many traveling vehicles. If the temperature abnormality monitoring device can identify the cause of heat generation in the terminal block of the power supply device, it is possible to take appropriate measures for the power supply device. As a result, it is possible to prevent a serious failure or the like of the power supply device.

The temperature may be a temperature rise from the temperature of the terminal block before the terminal block is energized. By observing the temperature in this way, the temperature abnormality monitoring device can grasp the temperature rise more accurately. Since the time is the elapsed time from when the temperature started to rise, it is also possible to accurately determine whether or not vibration is the cause of the temperature rise.

A first reference temperature related to temperature and a second reference temperature higher than the first reference temperature are set, and the temperature abnormality monitoring device measures the time when the first reference temperature is exceeded and the second reference temperature. may be determined that the cause of the temperature rise is vibration. According to this determination criterion, it can be appropriately determined whether or not the temperature rise is caused by vibration.

When the relationship between the temperature obtained from the terminal block and time is represented on a graph, does the temperature obtained from the terminal block pass through a predetermined area that indicates that it exceeds the reference temperature after a certain period of time has elapsed since the temperature began to rise? Depending on whether or not, the temperature abnormality monitoring device may determine whether or not vibration is the cause of the temperature rise. According to this determination criterion, it can be appropriately determined whether or not the temperature rise is caused by vibration.

When the relationship between the temperature and time obtained from the terminal block is represented in a graph, the temperature abnormality monitoring device determines whether or not the smoothness of the change in the temperature obtained from the terminal block with respect to time is equal to or less than a predetermined value. It may be determined whether the cause of the temperature rise is vibration. According to this determination criterion, it can be appropriately determined whether or not the temperature rise is caused by vibration.

As another aspect of the present invention, there may be provided a traveling vehicle system including a terminal block, a power feeding device for supplying power to a traveling vehicle, and any of the temperature abnormality monitoring devices described above. In this traveling vehicle system, it is possible to identify the cause of heat generation in the terminal block of the power supply device. It is possible to quickly take appropriate measures for the power supply device. Serious failure of the power supply device can be prevented.

Still another aspect of the present invention is a temperature abnormality monitoring method for monitoring temperature abnormality of a terminal block, in which the temperature of the terminal block is obtained in correspondence with time, and the temperature rise is determined based on the relationship between the temperature and time. Determine whether or not the cause includes vibration. This temperature abnormality monitoring method also provides the same functions and effects as the temperature abnormality monitoring device described above. That is, according to this temperature abnormality monitoring method, it is determined whether or not vibration is the cause of the temperature rise based on the relationship between the temperature of the terminal block and time. If there is a problem, the cause can be identified. Therefore, for example, it is possible to quickly take appropriate measures such as stopping the system that is the source of the vibration, or taking anti-vibration measures by the operator.

According to the present invention, at least when vibration is the cause of heat generation, the cause can be specified. Therefore, for example, it is possible to quickly take appropriate measures such as stopping the system that is the source of the vibration, or taking anti-vibration measures by the operator.

1 is a diagram showing a schematic configuration of a traveling vehicle system according to one embodiment of the present invention; FIG. FIG. 2 is a diagram showing configurations of a power supply device and a temperature abnormality monitoring device of the traveling vehicle system of FIG. 1; It is a figure for demonstrating the gap in a terminal block. FIG. 4 is a diagram illustrating the relationship between terminal block temperature and time, one graph showing temperature change in a normal state, and the other graph showing temperature change when abnormal temperature (heat generation) occurs due to vibration. be. FIG. 4 is a diagram for explaining the classification of areas for determining whether or not a temperature rise is caused by vibration based on the relationship between temperature and time; 4 is a flow chart showing the flow of processing in the temperature abnormality monitoring device according to one embodiment; FIG. 10 is a diagram showing test results when there is a 1 mm gap in the terminal block and there is no vibration; It is a figure which shows a test result when a gap of 1 mm and vibration exist in a terminal block. FIG. 10 is a diagram showing test results when there is a 3 mm gap in the terminal block and there is no vibration; FIG. 10 is a diagram showing test results when there is a 4 mm gap in the terminal block and there is no vibration;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the transport system 100 includes a plurality of overhead guided vehicles (traveling vehicles) 20 that travel along track rails T, and a non-contact power feeding device (power feeding device) for supplying power to the overhead guided vehicles 20. 1 and . The transport system 100 is a traveling vehicle system for transporting articles (not shown) using an overhead transport vehicle 20 that can move along track rails T. As shown in FIG. In the transport system 100, power is supplied to the power receiving device 21 of the overhead transport vehicle 20 from power feeders 10A and 10B provided on the track rail T in a non-contact manner. The overhead transport vehicle 20 runs on the power supplied to the power receiving device 21 or drives various devices provided in the overhead transport vehicle 20 .

The overhead carrier 20 includes, for example, a ceiling-suspended crane, OHT (Overhead Hoist Transfer), and the like. Articles include, for example, containers for storing a plurality of semiconductor wafers, containers for storing glass substrates, reticle pods, general parts, and the like. Here, for example, in a factory or the like, a conveying system 100 in which an overhead conveying vehicle 20 travels along a track rail T laid on the ceiling of the factory will be described as an example.

The track rail T is, for example, a circular track. Electric power is supplied from the contactless power supply device 1 to the power supply lines 10A and 10B. The feeder lines 10A and 10B are arranged below the track rail T in the running direction of the overhead transport vehicle 20 and on at least one of the right side and the left side with respect to the center of the track. Since the power supply line 10B is provided below the power supply line 10A, it is in a state of overlapping with the power supply line 10A in FIG.

The feeder lines 10A and 10B can be changed in arrangement with respect to the track rail T by the switching section 30 . The power supply lines 10A and 10B are arranged on the left side of the track rail T in the initial area connected to the contactless power supply device 1 . When the track rail T is advanced in the running direction of the overhead transport vehicle 20 , the switching unit 30 switches the arrangement of the feeder lines 10 A and 10 B from the left side of the track rail T to the right side. By arranging the power supply lines 10A and 10B on the right side of the track rail T, as shown in FIG. can continue to supply

Next, the temperature abnormality monitoring device 40 of this embodiment will be described with reference to FIGS. 1 to 3. FIG. As shown in FIG. 1, the transfer system 100 includes a temperature abnormality monitoring device 40 that monitors temperature abnormality of the terminal block 12 (see FIG. 3) of the contactless power supply device 1, for example. The temperature abnormality monitoring device 40 monitors the temperature abnormality of the terminal block 12 based on the temperature signal acquired and transmitted by the thermometer 15 attached to the terminal block 12 . The temperature abnormality monitoring device 40 monitors the temperature abnormality of the terminal block 12 provided in the contactless power supply device 1, but is not limited thereto. The temperature abnormality monitoring device 40 may monitor the temperature abnormality of the terminal block when the terminal block is used in one of the portions of the power supply lines 10A and 10B.

The temperature abnormality monitoring device 40 has its own determination algorithm, and by using the determination algorithm, the cause of the temperature rise of the terminal block 12 can be specified. The temperature abnormality monitoring device 40 identifies the cause of the temperature rise of the terminal block 12 based on the temporal change of the temperature rise of the terminal block 12 . In other words, the temperature abnormality monitoring device 40 identifies the cause of the temperature rise of the terminal board 12 based on the time differentiation of the temperature of the terminal board 12 .

As shown in FIG. 2, the temperature abnormality monitoring device 40 has a temperature acquisition unit 41, a temperature monitoring unit 42, a temperature prediction unit 43, a determination unit 44, and a controller (control unit) 45 as functional elements. . The temperature abnormality monitoring device 40 includes hardware such as a processor such as a CPU (Central Processing Unit), ROM (Read Only Memory), RAM (Random Access Memory), and memory, and software such as a program stored in the ROM. comprising a computer composed of In the temperature abnormality monitoring device 40, each function of the temperature abnormality monitoring device 40 is realized by the processor executing a predetermined software (program) read into a memory or the like and reading and writing data in the memory and storage. be done. The temperature abnormality monitoring device 40 has a notification unit 46 . The notification unit 46 may include an audible notification device, such as a speaker, or a visual notification device, such as a display.

FIG. 3 shows a schematic configuration of an example of the terminal block 12. As shown in FIG. The terminal block 12 is a member that fixes the terminals 11 provided at the ends of the feeder lines 10A and 10B and enables current conduction between the terminals 11 and the terminal block 12 . The terminal 11 and the terminal block 12 face each other. A terminal 11 is fixed and connected to the terminal block 12 with a screw 13 . A washer 14 or the like may be appropriately provided between the screw 13 and the terminal block 12 . A terminal piece 11 a of the terminal 11 is sandwiched between the screw 13 and washer 14 and the terminal block 12 . In the state shown in FIG. 3, the screw 13 is not completely tightened, and the terminal strip 11a is separated from the terminal block 12. As shown in FIG. That is, a slight gap G is formed between the terminal piece 11a and the terminal block 12. As shown in FIG. In this specification, the gap G is the distance between the contact surface of the terminal piece 11a and the contact surface of the terminal block 12, and in the state shown in FIG. Note that the terminal piece 11a is in contact with the terminal block 12 when the gap G is not formed.

In the non-contact power supply device 1, for example, when the connecting portion of the terminal block 12 vibrates, the screw 13 may become loose and a gap G may occur. Alternatively, there is a case where the connection portion of the terminal block 12 does not vibrate even though the gap G is generated. That is, the gap G may occur regardless of vibration. When these problems occur, the temperature of the terminal block 12 may rise due to contact resistance and arc discharge. That is, the terminal block 12 can generate heat. Alternatively, the connection portion of the terminal block 12 may vibrate even though the gap G is not generated. The temperature rise of the terminal block 12 exhibits its own tendency depending on these various situations. The temperature rise of the terminal block 12 may, for example, asymptotically approach a suitable temperature below the heat-resistant temperature (permissible temperature) of the feeder lines 10A and 10B, and as a result the temperature may not be abnormal. However, the temperature rise of the terminal block 12 may reach, for example, the heat-resistant temperature (permissible temperature) of the feeder lines 10A and 10B or higher, leading to disconnection (melting) of the feeder lines 10A and 10B. The temperature abnormality monitoring device 40 determines whether vibration is the cause of the temperature rise based on the temporal change in the temperature of the terminal block 12 .

As shown in FIG. 2, a thermometer 15 is attached to a portion of the feeder lines 10A and 10B near the terminal 11, for example. The thermometer 15 can measure the temperature of the terminal block 12 directly or indirectly via another member. The type of the thermometer 15 is not particularly limited as long as it can measure the temperature rise of the terminal block 12 and output or transmit the measured temperature of the terminal block 12 to the temperature abnormality monitoring device 40 . The thermometer 15 may be a thermistor type temperature sensor or the like, or may be a thermocouple type temperature sensor or the like. A thermometer 15 may be attached to the terminal 11 or the terminal block 12 . The position where the thermometer 15 is attached may be any part on the terminal block 12 or in the vicinity of the terminal block 12 . The thermometer 15 may be attached at a position remote from the terminal block 12 .

The non-contact power supply device 1 includes a power supply unit 10 that supplies power to the power receiving device 21 of the overhead carrier 20 and a power supply control unit 18 that controls the power supply unit 10 . The power supply control unit 18 supplies a constant current with a high current value such as 75 A (amperes) to the power supply lines 10A and 10B, for example. The temperature abnormality monitoring device 40 acquires a temperature signal indicating the temperature of the terminal block 12 output from the thermometer 15, performs a predetermined calculation based on the temperature of the terminal block 12, and controls the power supply control unit 18 by the controller 45. do. The controller 45 controls the power supply control unit 18 to continue or stop the power supply control in the contactless power supply device 1 .

The temperature abnormality monitoring device 40 stores a plurality of types of judgment criteria for judging whether or not vibration is the cause of the temperature rise. The temperature prediction unit 43 of the temperature abnormality monitoring device 40 predicts the future temperature of the terminal block 12 based on the relationship between the temperature of the terminal block 12 acquired up to now and the time when the temperature was acquired. The temperature prediction unit 43 predicts the future temperature of the terminal block 12 by using the time differentiation of the temperature.

The temperature prediction unit 43 enables temperature prediction by, for example, deriving the following relational expression (1). In Equation (1), θ is temperature (°C). The time constant τ is an eigenvalue of the system, and is a value that can be obtained in advance based on actual measurements. Specifically, the time constant τ is the time to reach the temperature of θ _max ×0.68.

The temperature prediction unit 43 calculates θ _max from the time constant τ, the current temperature θ, and the time derivative of θ by the following equation (2). θ _max is a constant value.

If the temperature of the terminal block 12 predicted by the temperature prediction unit 43 satisfies any of the criteria described below, the temperature abnormality monitoring device 40 determines that vibration is the cause of the temperature rise. The first criterion will be described with reference to FIG. Both of the two graphs shown in FIG. 4 are trial calculation results of the temperature rise of the terminal block 12 . A graph indicated by a solid line (lower graph) shows temperature changes when the connection portion of the terminal block 12 is vibrating but the gap G is not generated. A graph partially indicated by a dashed line (upper graph) shows temperature changes when a gap G of 1 mm is generated and the connecting portion of the terminal block 12 is vibrating. This trial calculation is based on an accelerated test. Therefore, since there is no particular meaning in displaying the horizontal axis, the notation of the horizontal axis is omitted.

In the graph of FIG. 4, the temperature value is the temperature rise from the temperature of the terminal block 12 before the terminal block 12 is energized. That is, the origin corresponds to the temperature of the terminal block 12 before the terminal block 12 is energized, and corresponds to the energization start time. The above concepts regarding the vertical axis (increased temperature), horizontal axis (time), and the origin are the same for the following description with reference to FIGS. 5 and 7 to 10. FIG.

As shown in FIG. 4, when the gap G does not occur, the temperature of the terminal block 12 asymptotically approaches a relatively low predetermined temperature (around 30° C.), resulting in no abnormal temperature. On the other hand, when there is a gap G of 1 mm and the connection portion of the terminal block 12 is vibrating, the temperature of the terminal block 12 rises sharply compared to the lower graph, and the time T1 exceeds 50°C. In such a case, the temperature anomaly monitoring device 40 predicts the future temperature indicated by the dashed line based on the already acquired temperature data indicated by the solid line. The temperature abnormality monitoring device 40 stores a first reference temperature and a second reference temperature higher than the first reference temperature. In other words, these two reference temperatures are set in the monitoring control by the temperature abnormality monitoring device 40 . The first temperature is, for example, a temperature lower than the heat-resistant temperature (permissible temperature) of the feeders 10A and 10B. The second temperature is, for example, a temperature equal to or higher than the heat-resistant temperature (permissible temperature) of the feeders 10A and 10B. As an example, the first temperature may be set to 50°C and the second temperature may be set to 100°C. The temperature of the terminal block 12 predicted by the temperature prediction unit 43 exceeds 100° C. at time T2.

The determination unit 44 of the temperature abnormality monitoring device 40 determines whether or not the temperature rise is caused by vibration. As a first criterion, the determining unit 44 determines the difference (T2 -T1) is equal to or longer than a predetermined time, it is determined that the cause of the temperature rise is vibration. This predetermined time may be determined based on the contact resistance value between the terminal 11 and the terminal block 12, for example. This predetermined period of time is, for example, two hours on the basis of the time axis based on the acceleration test. As the predetermined time, an appropriate time of one hour or more may be set based on the time axis based on the acceleration test.

Next, the second criterion will be described with reference to FIG. In FIG. 5, a plurality of areas (regions) are set in the graph showing the relationship between temperature and time. The inventors of the present invention have found, based on multiple test results regarding the temperature rise of the terminal block 12, that a predetermined distribution can be obtained for the phenomenon that actually occurs. That is, the first area A1 shown in FIG. 5 is an area in which the connection state of the terminal block 12 is normal with respect to temperature and time. Regarding the temperature and time, the second area A2 has a gap G of 1 to 2 mm in the terminal block 12, but the temperature is lower than the reference temperature, so it can be regarded as normal. The temperature change shown in FIG. 7 (gap 1 mm, no vibration) corresponds to the temperature change belonging to this second area A2.

A third area A3 is an area where a gap G of 1 mm is generated in the terminal block 12 and vibration is generated. Since the temperature exceeds the reference temperature in this region, it is considered a temperature anomaly if the plot of temperature versus time is contained within this region. The temperature change shown in FIG. 8 (with a gap of 1 mm and vibration) corresponds to the temperature change belonging to the third area A3.

A fourth area A4 is an area in which a relatively large gap G of 3 to 5 mm is generated in the terminal block 12, but no vibration is generated. Since the temperature also exceeds the reference temperature in this region, it is considered a temperature anomaly if the plot of temperature versus time is contained within this region. The temperature changes shown in FIG. 9 (gap 3 mm, no vibration) and the temperature changes shown in FIG. 10 (gap 4 mm, no vibration) correspond to temperature changes belonging to the fourth area A4.

The reference temperature existing between the third area A3 and the fourth area A4 and the second area A2 corresponds to the second reference temperature (for example, 100° C.) in the first criterion described above. The reference temperature for the second criterion may be higher than the second reference temperature for the first criterion.

When the relationship between the temperature and time obtained from the terminal block 12 is represented in a graph, the determination unit 44 of the temperature abnormality monitoring device 40 determines that the temperature obtained from the terminal block 12 has passed a certain period of time since the temperature started to rise. It is determined whether or not the temperature rise is caused by vibration depending on whether or not the vehicle passes through the fourth area (predetermined area) A4 indicating that the temperature will later exceed the reference temperature. That is, when the temperature of the terminal block 12 predicted by the temperature prediction section 43 passes through the fourth area A4, the determination section 44 determines that the temperature rise is caused by vibration. Further, when the temperature of the terminal block 12 predicted by the temperature prediction section 43 does not pass through the fourth area A4, the determination section 44 may determine that the temperature rise is not caused by vibration. The certain period of time may be appropriately determined according to the type or characteristics of the terminal block 12 .

Next, the third criterion will be explained. As is clear from FIG. 4, when vibration is included in the cause of the temperature rise, the smoothness of the change in temperature over time is clearly lower than when vibration is not included in the cause of the temperature rise. small. In this specification, smoothness exceeding a predetermined value means that the graph does not have a zigzag bent portion when viewed at the scale shown in FIG. It is a state in which continuous differentiation of the graph is possible. When the relationship between the temperature and time obtained from the terminal block 12 is represented in a graph, the determination unit 44 of the temperature abnormality monitoring device 40 determines that the smoothness of the temperature change over time obtained from the terminal block 12 is equal to or less than a predetermined value. , it is determined whether or not the temperature rise is caused by vibration. That is, when the smoothness of the temperature change over time of the terminal block 12 predicted by the temperature prediction unit 43 is equal to or less than a predetermined value, the determination unit 44 determines that the temperature rise is caused by vibration. Further, when the smoothness of change in the temperature of the terminal block 12 over time predicted by the temperature prediction unit 43 exceeds a predetermined value, the determination unit 44 determines that vibration is not included in the cause of the temperature rise. good too. "Smoothness" may be replaced by the term "smoothness".

A process flow (temperature abnormality monitoring method) in the temperature abnormality monitoring device 40 will be described with reference to FIG. The temperature acquisition unit 41 acquires a temperature signal regarding the temperature of the terminal block 12 from the thermometer 15 (step S1). The thermometer 15 outputs a temperature signal at predetermined time intervals or continuously, and the temperature acquisition unit 41 acquires the temperature of the terminal block 12 at predetermined time intervals, for example. The temperature acquisition unit 41 acquires the temperature of the terminal block 12 in correspondence with time. Next, the temperature monitoring unit 42 determines whether or not the acquired temperature is equal to or higher than the threshold (step S2). When the temperature monitoring unit 42 determines that the acquired temperature is equal to or higher than the threshold (step S2; YES), the controller 45 controls the notification unit 46 to output an alarm (step S11), and the contactless power supply device 1 is controlled to perform power supply stop control (step S12). Here, the threshold value stored in the temperature monitoring unit 42 may be a temperature equal to or higher than the above-described second reference temperature, that is, the heat-resistant temperature (permissible temperature) of the power supply lines 10A and 10B.

When the temperature monitoring unit 42 determines that the acquired temperature is less than the threshold value (step S2; NO), the temperature monitoring unit 42 determines whether or not it has detected the start of temperature rise (step S3). In this case, the temperature of the terminal block 12 before the terminal block 12 is energized serves as a reference. When the temperature monitoring unit 42 determines that the start of temperature rise has been detected (step S3; YES), the temperature prediction unit 43 predicts the temperature of the terminal block 12 (step S4). When the temperature monitoring unit 42 determines that the start of temperature rise is not detected (step S3; NO), the controller 45 causes the power supply control unit 18 to continue power supply control (step S6).

Subsequent to step S4, the determination unit 44 determines whether the predicted relationship between temperature and time satisfies the condition for determining the cause of temperature rise (step S5). The determination in step S5 is performed using either one of the three types of determination criteria described above, or two or more of the three types of determination criteria. That is, the determination unit 44 determines whether or not the temperature rise is caused by vibration. If the determination unit 44 determines that the predicted relationship between temperature and time satisfies the condition for determining the cause of the temperature rise (step S5; YES), the controller 45 controls the notification unit 46 to output an alarm (step Along with S11), the power supply controller 18 of the contactless power supply device 1 is controlled to perform power supply stop control (step S12). When the determination unit 44 determines that the predicted relationship between temperature and time does not satisfy the condition for determining the cause of the temperature rise (step S5; NO), the controller 45 causes the power supply control unit 18 to continue power supply control. (Step S6).

The series of processes described above are repeated while the ceiling transport vehicle 20 in the transport system 100 is in operation, that is, while the non-contact power supply device 1 is in operation.

According to the temperature abnormality monitoring device and temperature abnormality monitoring method of the present embodiment, it is determined whether or not the temperature rise is caused by vibration based on the relationship between the temperature of the terminal block 12 and time. This makes it possible to specify at least the cause of heat generation when vibration is the cause. Therefore, for example, it is possible to quickly take appropriate measures such as stopping the transport system 100, which is a source of vibration, or taking anti-vibration measures by the operator.

In the transport system 100 , if the terminal block 12 of the contactless power supply device 1 generates abnormal heat, many overhead transport vehicles 20 will be hindered. If the temperature abnormality monitoring device 40 can identify the cause of the heat generation of the terminal block 12 of the contactless power supply device 1 , it is possible to take appropriate measures for the contactless power supply device 1 . As a result, a serious failure or the like of the contactless power supply device 1 can be prevented.

The temperature rise from the temperature of the terminal block 12 before the terminal block 12 is energized is acquired. By observing the temperature in this way, the temperature abnormality monitoring device 40 can more accurately grasp the temperature rise. Since the time is the elapsed time from when the temperature started to rise, it is also possible to accurately determine whether or not vibration is the cause of the temperature rise.

The temperature abnormality monitoring device 40 determines that the temperature rise is caused by vibration when the difference between the time the first reference temperature is exceeded and the time the second reference temperature is exceeded is equal to or greater than a predetermined time. . According to this determination criterion, it can be appropriately determined whether or not the temperature rise is caused by vibration.

Depending on whether or not the temperature obtained from the terminal block 12 passes through a predetermined area indicating that the temperature exceeds the reference temperature after a certain period of time has passed since the temperature started to rise, the temperature abnormality monitoring device 40 determines whether vibration is included in the cause of the temperature rise. determine whether or not According to this determination criterion, it can be appropriately determined whether or not the temperature rise is caused by vibration.

The temperature abnormality monitoring device 40 determines whether or not vibration is the cause of the temperature rise, depending on whether or not the smoothness of temperature change over time acquired from the terminal block 12 is equal to or less than a predetermined value. According to this determination criterion, it can be appropriately determined whether or not the temperature rise is caused by vibration.

The transfer system 100 can identify the cause of the heat generation of the terminal block 12 of the contactless power supply device 1 . It is possible to quickly take appropriate measures for the contactless power supply device 1 . Serious failure of the contactless power supply device 1 can be prevented.

When a plurality of criteria out of the three types of criteria described above are used together, it may be determined that vibration is included in the cause of the temperature rise in some or all of the criteria. In that case, it is possible to determine that vibration is occurring based on the determination result that vibration is included in a predetermined number (an arbitrary number such as one, two, or three) of determination criteria.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments. For example, the temperature abnormality monitoring device of the present invention may be configured to monitor temperature abnormality of the terminal block in the power receiving device 21 of the overhead transport vehicle 20 . The temperature abnormality monitoring device may monitor temperature abnormality of the terminal block of the contactless power supply device 1 and monitor temperature abnormality of the terminal block of the power receiving device 21 . In that case, the temperature of the terminal block may be detected by a thermometer, and the temperature abnormality monitoring device may receive the temperature signal through wired communication or wireless communication.

The temperature abnormality monitoring device is not limited to a power supply system using a contactless power supply device, and may be applied to other power supply systems. The temperature abnormality monitoring device can be applied to any system including a terminal block, and may be applied to, for example, a power system for driving machine tools.

The temperature abnormality monitoring device is not limited to the form of controlling the power supply control unit 18 of the contactless power supply device 1 to perform power supply stop control. For example, when a temperature abnormality caused by vibration of the terminal block 12 is detected, the temperature abnormality monitoring device controls the notification unit 46 to issue an alarm or the like to notify the temperature abnormality and prompt an operator to inspect the temperature abnormality. may In this case, the notification unit 46 may issue a voice guidance such as "If the power supply continues, the temperature of the terminal block will rise to a dangerous temperature. Please check the power supply device before stopping it." good. The temperature abnormality monitoring device may perform determination processing for determining whether or not vibration is the cause of the temperature rise. In that case, the temperature abnormality monitoring device may output the determination result to an external device.

The temperature abnormality monitoring device does not have to predict the temperature of the terminal block 12 . For example, when abnormal heat generation occurs in the terminal block 12, the temperature abnormality monitoring device may perform post-analysis after temperature measurement is completed. In that case, the temperature prediction unit 43 included in the temperature abnormality monitoring device 40 of the above embodiment is omitted. The temperature abnormality monitoring device determines whether vibration is the cause of the temperature rise based on the relationship between the temperature of the terminal block and time. A post hoc analysis is to determine whether vibration is the cause of the temperature rise.

REFERENCE SIGNS LIST 1 non-contact power supply device (power supply device), 10 power supply unit, 10A, 10B power supply line, 11 terminal, 11a terminal strip, 12 terminal block, 13 screw, 15 thermometer, 18 power supply control Part 20: Overhead transport vehicle (traveling vehicle) 21: Power receiving device 40: Abnormal temperature monitoring device 41: Temperature acquisition unit 42: Temperature monitoring unit 43: Temperature prediction unit 44: Judging unit 45: Controller , 46... reporting unit, A1... first area, A2... second area, A3... third area, A4... fourth area, G... gap.

Claims (9)

A temperature abnormality monitoring device for monitoring temperature abnormality of a terminal block,
A first reference temperature related to the temperature of the terminal block and a second reference temperature higher than the first reference temperature are set,
The temperature of the terminal block is acquired in correspondence with time, and if the difference between the time over which the first reference temperature is exceeded and the time over which the second reference temperature is exceeded is a predetermined time or more, the temperature rise is determined. A temperature anomaly monitoring device that determines that vibration is the cause . A temperature abnormality monitoring device for monitoring temperature abnormality of a terminal block,
When the temperature of the terminal block is obtained in correspondence with time, and the relationship between the temperature obtained from the terminal block and time is represented in a graph, the temperature obtained from the terminal block is A temperature anomaly monitoring device that determines whether or not vibration is the cause of a temperature rise, depending on whether or not a predetermined area indicating that the temperature exceeds a reference temperature after a certain period of time has passed from the point of departure. A temperature abnormality monitoring device for monitoring temperature abnormality of a terminal block,
When the temperature of the terminal block is obtained corresponding to time and the relationship between the temperature obtained from the terminal block and time is represented in a graph, the smoothness of the change in the temperature obtained from the terminal block with respect to time is equal to or less than a predetermined value to determine whether vibration is the cause of the temperature rise. The temperature abnormality monitoring device according to any one of claims 1 to 3 , wherein the terminal block is included in a power supply device for supplying power to a traveling vehicle. The temperature abnormality monitoring device according to any one of claims 1 to 4 , wherein the temperature is a temperature rise from the temperature of the terminal block before the terminal block is energized. running car and
a power supply device for supplying power to the traveling vehicle, including the terminal block;
A temperature abnormality monitoring device according to any one of claims 1 to 5 ;
A running vehicle system. A temperature abnormality monitoring method for monitoring temperature abnormality of a terminal block,
setting a first reference temperature related to the temperature of the terminal block and a second reference temperature higher than the first reference temperature;
The temperature of the terminal block is acquired in correspondence with time, and if the difference between the time over which the first reference temperature is exceeded and the time over which the second reference temperature is exceeded is a predetermined time or more, the temperature rise is determined. A temperature abnormality monitoring method for determining that vibration is included in the cause . A temperature abnormality monitoring method for monitoring temperature abnormality of a terminal block,
When the temperature of the terminal block is obtained in correspondence with time, and the relationship between the temperature obtained from the terminal block and time is represented in a graph, the temperature obtained from the terminal block is A temperature anomaly monitoring method for determining whether or not vibration is a cause of a temperature rise, depending on whether or not a predetermined area indicating that the temperature exceeds a reference temperature after a certain period of time has passed from the point of time. A temperature abnormality monitoring method for monitoring temperature abnormality of a terminal block,
When the temperature of the terminal block is obtained corresponding to time and the relationship between the temperature obtained from the terminal block and time is represented in a graph, the smoothness of the change in the temperature obtained from the terminal block with respect to time is equal to or less than a predetermined value, determining whether or not vibration is the cause of the temperature rise.

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