JP6481726B2 - Data collection system - Google Patents

Description

  The present invention relates to a data collection system including a plurality of units in which a plurality of modules for measurement are connected by an intra-unit bus, and any module in each unit is connected by an inter-unit bus.

  When measuring various physical quantities such as voltage, resistance, and temperature, a plurality of measurement modules are used, and measurement data is collected from each module. Further, even when measuring signals of the same physical quantity, when measuring at a large number of measurement points, etc., measurement is performed using a plurality of modules having the same function and collecting measurement data.

  When a plurality of measurement modules are used, each module is connected by a bus to be unitized. Further, in recent years, a plurality of units are connected to form a multi-unit. FIG. 10 shows a configuration example of a data collection system 500 in which modules are multi-united.

  In the data collection system 500 of this example, a unit 0 is formed by four modules (Mod0-0 to Mod0-3), and a unit 1 is formed by four modules (Mod1-0 to Mod1-3). The unit 2 is formed by a single module (Mod2-0 to Mod2-3). An intra-unit bus that performs serial communication is used for communication between modules in the unit.

  The module Mod0-0 of the unit 0, the module Mod1-0 of the unit 1, and the module Mod2-0 of the unit 2 are connected to the inter-unit bus. For inter-unit communication, an inter-unit bus that performs serial communication is used.

  In the data collection system 500, a time master module serving as a time reference is set. Here, it is assumed that the module Mod0-0 having a clock therein is the time master. Other modules do not have a clock in principle.

  In the data collection system having such a configuration, when each module performs measurement at a predetermined measurement start time, the procedure is as follows.

  First, at the measurement start time, as shown by a signal S11 in FIG. 11, the time master module Mod0-0 sends a measurement start command to the modules Mod1-0 and Mod2-0 using the inter-unit bus.

  Next, as shown in signal S12-1, signal S12-2, and signal S12-3 in FIG. 11, module Mod0-0, module Mod1-0, and module Mod2-0 use the internal buses within the units. A measurement start command is sent to each module. Thereby, measurement is performed in each module.

  After the measurement, as shown in signal S13-1, signal S13-2, and signal S13-3 in FIG. 12, in each unit, module Mod0-0, module Mod1-0, and module Mod2-0 are included in each unit. Collect measurement data from each module. The collection of measurement data is performed by polling, for example. As a result, the measurement data in each unit is collected in module Mod0-0, module Mod1-0, and module Mod2-0.

  Next, as shown by a signal S14 in FIG. 12, the time-modifier module Mod0-0 collects measurement data collected in the unit from the modules Mod1-0 and Mod2-0 through the inter-unit bus. As a result, all measurement data in the data collection system 500 is collected in the module Mod0-0 which is the time master.

JP 2011-227795 A

  Conventionally, in the multi-unit type data collection system, the time master module is the main as described above, and the measurement data of each module is collected.

  By the way, if the measurement data of other modules can be used in each module in the data collection system, it is convenient to perform various data processing for each module.

  At this time, if a time stamp indicating the measurement time is added to the measurement data, it becomes useful information for data processing, and the utility value of the measurement data is increased. However, conventionally, since only the time master module manages time information, it is difficult to add a time stamp to measurement data in each module.

  Thus, the present invention provides a data collection system in which a plurality of modules are connected by an intra-unit bus, and each module is connected by an inter-unit bus. The purpose is to make measurement data to be generated available to each module with a time stamp added.

In order to solve the above problems, a data collection system according to the first aspect of the present invention includes:
A plurality of modules each including a plurality of modules each provided with a clock unit for measuring time are connected to each other via an intra-unit bus, and at least a first unit among any of the modules constituting each unit and one of the modules that constitute the one of the modules constituting the second unit is a connected data acquisition system through the inter-unit bus,
One of the modules is defined as the time master,
A data collection system in which each module includes the following units.
1) If it is a time master, the time information based on its own clock part is transmitted by the intra-unit bus, and further, if connected to the inter-unit bus, the time information is transmitted by the inter-unit bus,
If not the time master, when the time information is received from the inter-unit bus, the time information is transmitted to another module connected to the intra-unit bus via the intra-unit bus, and the intra-unit bus When the time information is received from the unit, the time information is constituted by another module different from the own unit connected to the inter-unit bus via the inter-unit bus or a unit constituted by a module that is a time master. A time adjustment unit that transmits to at least one of the other modules that are not.
2) A measurement unit that starts measurement based on its own clock unit and acquires measurement data.
3) A time stamp adding unit that adds a time stamp based on the time of its own clock unit to the measurement data.
4) the measured data of its own that the time stamp is added through the unit bus own apparatus is connected to send to other modules,
When connected to the inter-unit bus, when the measurement data of another module with a time stamp added is received from the inter-unit bus, another module different from the own device via the intra-unit bus When the measurement data of the other module to which the time stamp is added is received from the internal bus, the measurement data of the own device to which the time stamp is added are automatically transmitted. Measurement data transmission / reception unit that transmits to other modules via the inter- unit bus connected to the machine.
In order to solve the above problem, a module according to a second aspect of the present invention is:
A plurality of modules each including a plurality of modules each provided with a clock unit for measuring time are connected to each other via an intra-unit bus, and at least a first unit among any of the modules constituting each unit Are modules constituting a data collection system in which any module constituting the second unit and any module constituting the second unit are connected via an inter-unit bus, and includes the following units.
1) Time information based on its own clock unit is transmitted to another module via the intra-unit bus, and when connected to the inter-unit bus, the time information is transmitted to the other module via the inter-unit bus. A time adjustment unit that transmits time information.
2) A measurement unit that starts measurement based on its own clock unit and acquires measurement data.
3) A time stamp adding unit that adds a time stamp based on the time of its own clock unit to the measurement data.
4) sends the measurement data of itself the time stamp is added in unit bus,
When connected to the inter-unit bus, the measurement data of other modules which the time stamp is added, and when received from the previous SL-unit bus, different other than the own device via the unit bus When this measurement data is transmitted to the module and the measurement data of the other module with the time stamp added is received from the intra-unit bus, this measurement data and the own measurement data with the time stamp added are Measurement data transmission / reception unit that transmits to other modules via the inter- unit bus to which the device is connected.
In order to solve the above-described problem, the module according to the third aspect of the present invention includes:
A plurality of modules each including a plurality of modules each provided with a clock unit for measuring time are connected to each other via an intra-unit bus, and at least a first unit among any of the modules constituting each unit Are modules constituting a data collection system in which any module constituting the second unit and any module constituting the second unit are connected via an inter-unit bus, and includes the following units.
1) When a module other than the time master receives time information from another module, it corrects its own clock unit based on the received time information, and when the module is connected to the inter-unit bus, When the time information is received from the inter-bus, it corrects its own clock unit based on the received time information, and the other time information is connected to the intra-unit bus via the intra-unit bus. When the time information is received from the intra-unit bus, the time information is another module or time master different from the own unit connected to the inter-unit bus via the inter-unit bus. A time adjustment unit that transmits to at least one of other modules that do not constitute the unit that the module constitutes.
2) A measurement unit that starts measurement based on its own clock unit and acquires measurement data.
3) A time stamp adding unit that adds a time stamp based on the time of its own clock unit to the measurement data.
4) sends the measurement data of itself the time stamp is added in unit bus,
When connected to the inter-unit bus, when the measurement data of another module with a time stamp added is received from the inter-unit bus, another module different from the own device via the intra-unit bus the transmitted measurement data, when said time stamp receives measurement data of the added other modules from unit bus of its own measurement data and the time stamp of this is added to the measurement data to, Measurement data transmission / reception unit that transmits to other modules via the inter- unit bus to which the device is connected.

  According to the present invention, in a data acquisition system in which a plurality of modules are connected by an intra-unit bus and each module is connected by an inter-unit bus, each module is The generated measurement data can be used in each module with a time stamp added.

It is a figure which shows the structure of the data collection system which concerns on this embodiment. It is a block diagram which shows the structure of a module. It is a flowchart explaining operation | movement of the time adjustment part of the module which functions as a time master. It is a flowchart explaining operation | movement of the time adjustment part of modules other than a time master. It is a figure explaining the time synchronous operation | movement of each module. It is a flowchart explaining the measurement operation | movement and transmission operation | movement of measurement data in each module. It is a flowchart explaining the reception operation | movement of the measurement data in each module. It is a figure explaining the measurement data transmission / reception operation in a unit. It is a figure explaining the measurement data transmission / reception operation between units. It is a block diagram which shows the structural example of the data collection system which made the module multi-unit. It is a figure explaining the procedure in which each module performs a measurement in the predetermined measurement start time in a data collection system. It is a figure explaining the procedure which collects measurement data from each module in a data collection system.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram illustrating a configuration of a data collection system 10 according to the present embodiment. As shown in the figure, the data collection system is configured by forming a plurality of units in which a plurality of modules 100 are connected by an intra-unit serial bus, and any module in the unit is connected by an inter-unit bus. The

  In the data collection system 10, a unit 0 is formed by four modules (Mod0-0 to Mod0-3), and a unit 1 is formed by four modules (Mod1-0 to Mod1-3). Unit 2 is formed of (Mod2-0 to Mod2-3). An intra-unit bus that performs serial communication is used for communication between modules in the unit. The number of modules 100 forming each unit is arbitrary.

  The module Mod0-0 of the unit 0, the module Mod1-0 of the unit 1, and the module Mod2-0 of the unit 2 are connected to the inter-unit bus. An inter-unit bus that performs general-purpose communication such as TCP / IP is used for communication between units. The number of units constituting the system 10 is arbitrary.

  In the data collection system 10, each module 100 includes a clock unit that measures time. In order to perform time management unified within the system 10, it is necessary to synchronize each clock unit with a reference time. For this reason, one of the modules 100 in the system 10 functions as a time master. Here, it is assumed that the module Mod0-0 is a time master. The time master module 100 may be connected to the inter-unit bus.

  Which module 100 becomes the time master can be determined as appropriate. For example, information can be exchanged between modules, and the module 100 having the clock unit with the highest accuracy can be determined as the time master. Alternatively, it may be determined according to a predetermined rule such as setting the module 100 having the smallest set address as the time master, or may be determined in advance by the administrator of the data collection system 10. Further, when the module 100 that has been the time master fails, the time master can be taken over by another module 100.

  FIG. 2 is a block diagram showing a functional configuration of the module 100 according to the present embodiment. As shown in the figure, the module 100 includes a clock unit 110, a time adjustment unit 120, a measurement unit 130, a data buffer 140, an intra-unit communication unit 150, an inter-unit communication unit 160, a measurement data transmission / reception unit 170, and a time stamp addition unit. 180 and a measurement data processing unit 190. These functional units can be constructed by a CPU, a memory, an IC, an interface, other hardware or software.

  The clock unit 110 is a real time clock and measures time. In the time master module 100, the time adjustment unit 120 transmits reference time information to other modules, and in the module 100 other than the time master, the time adjustment unit 120 has its own clock unit based on the time information sent from the other modules. The time 110 is corrected and time information is transmitted to other modules as necessary. Detailed operation of the time adjustment unit 120 will be described later.

  The measurement unit 130 performs measurement and generates measurement data. The type and content of measurement data correspond to the model and various settings of each module 100. The generated measurement data is temporarily stored in the data buffer 140. In addition to the data buffer 140, an auxiliary storage device such as a hard disk may be incorporated, or the portable storage device may be accessible so that the measurement data can be stored in a nonvolatile manner.

  The intra-unit communication unit 150 communicates with other modules 100 in the same unit through an intra-unit bus. For example, the intra-unit communication unit 150 performs transmission processing according to the transmission timing predetermined for each module in the unit with reference to the time information of its own clock unit 110, so that it can communicate with other modules 100 in the unit. Measurement data or the like can be transmitted without collision.

  The inter-unit communication unit 160 communicates with the module 100 connected to the inter-unit bus of another unit via the inter-unit bus. Communication between units can be broadcast transmission. The inter-unit communication unit 160 can be omitted in the module 100 that is not connected to the inter-unit bus.

  The measurement data transmission / reception unit 170 transmits / receives measurement data to / from other modules 100 using an intra-unit bus and an inter-unit bus. In the data collection system 10, a time stamp is added to transmitted / received measurement data. Detailed operation of the measurement data transmitting / receiving unit 170 will be described later.

  The time stamp adding unit 180 adds a time stamp to the measurement data stored in the data buffer 140 based on the time information of its own clock unit 110. The time stamp only needs to be associated with the measurement data, and may be added to each measurement data, or may be added to a predetermined unit of measurement data.

  The measurement data processing unit 190 performs various processes using measurement data generated by itself or measurement data acquired from other modules 100. The contents of processing to be performed can be determined for each module 100. The measurement data processing unit 190 may perform only the processing using the measurement data generated by itself, or may omit the module 100 that does not perform special measurement data processing.

  Next, the operation of the time adjustment unit 120 of the module 100 functioning as a time master will be described with reference to the flowchart of FIG.

  The time adjustment unit 120 of the module 100 functioning as the time master transmits the time information to the other modules 100 in the same unit by using the intra-unit bus at a predetermined transmission timing (S101: Yes) (S102). .

  When the module 100 functioning as the time master is connected to the inter-unit bus (S103: Yes), the time information is transmitted to the modules of other units connected to the inter-unit bus using the inter-unit bus. (S104). Note that the transmission of time information using the intra-unit bus (S102) and the transmission of time information using the inter-unit bus (S104) do not necessarily have to be linked, and may be at different timings. The module 100 functioning as a time master repeats the above processing at predetermined intervals.

  Next, the operation of the time adjustment unit 120 of the module 100 other than the time master will be described with reference to the flowchart of FIG.

  When the time adjustment unit 120 of the module 100 other than the time master receives time information from another module 100 (S201: Yes), the time adjustment unit 120 corrects the time of its own clock unit 110 based on the received time information (S202).

  Further, if the module 100 is connected to the inter-unit bus (S203: Yes), if this time information is received from the inter-unit bus (S204: Yes), the intra-unit bus is used. The time information is transmitted to the other modules 100 in the unit (S205).

  On the other hand, when the time information is not received from the inter-unit bus (S204: No), that is, when the time information is received from the time master via the intra-unit bus, the inter-unit bus is utilized using the inter-unit bus. The time information is transmitted to the modules of other units connected to (S206). Note that reception of time information from another module 100 (S201: Yes) and transmission of time information using an intra-unit bus (S205) or transmission of time information using an inter-unit bus (S206) are not necessarily performed. It does not need to be interlocked and may be a separate timing.

  Due to the operations of the time adjustment unit 120 of the module 100 functioning as the time master and the time adjustment unit 120 of the other modules 100, the clock unit 110 of each module 100 in the system 10 follows the flow shown in FIG. Will be synchronized.

  That is, the time master module Mod0-1 transmits time information to the module 100 of the unit 0 by the signal S1 using the intra-unit bus. The time adjustment unit 120 of the module 100 that has received the time information corrects the time count of its own clock unit 110. Thereby, the clock part 110 of each module 100 of the unit 0 is synchronized.

  Since the module Mod0-3 of the unit 0 is connected to the inter-unit bus, the time information is transmitted to the module Mod1-3 of the unit 1 and the module Mod2-3 of the unit 2 by the signal S2 using the inter-unit bus. . The time adjustment unit 120 of both modules that received the time information corrects the time count of its own clock unit 110. Thereby, the module Mod1-3 of the unit 1 and the clock unit 110 of the module Mod2-3 of the unit 2 are also synchronized.

  The module Mod1-3 of the unit 1 transmits time information to the other modules 100 of the unit 1 by the signal S3-1 using the intra-unit bus, and the module Mod2-3 of the unit 2 uses the intra-unit bus. The time information is transmitted to the other module 100 of the unit 2 by the signal S3-2. The time adjustment unit 120 of the module 100 that has received the time information corrects the time count of its own clock unit 110. As a result, the clock units 110 of all the modules in the system 10 are synchronized.

  Next, the measurement operation and measurement data transmission operation in each module 100 will be described with reference to the flowchart of FIG.

  When each module 100 in the system 10 reaches the measurement start time based on the time information of its own clock unit 110 (S301: Yes), the measurement unit 130 performs the measurement (S302). Since it is based on the time information of its own clock unit 110, a measurement start instruction from another module 100 is unnecessary. The measurement start time can be determined for each module 100. The measurement data is temporarily stored in the data buffer 140.

  The time stamp adding unit 180 adds a time stamp to the measurement data based on the time information of its own clock unit 110 (S303). Since the clock unit 110 of each module 100 is synchronized, a reference time stamp unified by the system 10 is added.

  Then, according to the transmission timing assigned to each module 100 (S304: Yes), the measurement data transmission / reception unit 170 transmits the measurement data with a time stamp to the other modules 100 in the unit via the intra-unit bus (S305). . This makes it possible to use time-stamped measurement data in other modules 100 in the unit.

  Next, the reception operation of the measurement data in the measurement data transmission / reception unit 170 of each module 100 will be described with reference to the flowchart of FIG. When the measurement data transmission / reception unit 170 of each module 100 receives measurement data with a time stamp from another module (S401: Yes), when using the received measurement data (S402: Yes), the measurement data processing unit 190 performs processing (S403). At this time, since the time stamp is added to the measurement data, the utility value of the measurement data in processing such as recording and control can be increased.

  Further, if the module 100 is connected to the inter-unit bus (S405: Yes), if this measurement data is received from the inter-unit bus (S405: Yes), the intra-unit bus is used. The time-stamped measurement data is transmitted to the other modules 100 in the unit (S406). As a result, the received measurement data can be used by other modules 100 in the unit.

  On the other hand, when the measurement data is not received from the inter-unit bus (S405: No), that is, when the measurement data is received from the intra-unit bus, the unit is used so that it can be used by other units. The measurement data with time stamp is transmitted to the modules of other units connected to the inter-unit bus using the inter-bus (S407).

  By the operation of the measurement data transmitting / receiving unit 170 of each module 100 described above, the measurement data with time stamp generated by the other modules 100 in the module can be used in each module of the system 10 as shown in FIG. Become.

  That is, each module of the unit 0 transmits the measurement data with the time stamp generated by the module 0 to the intra-unit bus by the signal S4-1. Thereby, each module of the unit 0 can use the measurement data with the time stamp generated by the other modules of the unit 0.

  Similarly, each module of the unit 1 transmits the measurement data with the time stamp generated by the module 1 to the intra-unit bus by a signal S4-2. Thereby, each module of the unit 1 can use measurement data with a time stamp generated by other modules of the unit 1. Each module of the unit 2 transmits the measurement data with a time stamp generated by the module 2 to the intra-unit bus by a signal S4-3. Thereby, each module of the unit 2 can use measurement data with a time stamp generated by other modules of the unit 2.

  Further, by the operation of the measurement data transmitting / receiving unit 170 of each module 100 described above, as shown in FIG. 9, measurement data with a time stamp generated by another module in the system 10 can be used.

  That is, the module Mod0-3 of the unit 0 uses the signal S5-1 using the inter-unit bus to generate the time-stamped measurement data generated by other modules of the unit 0 and the time-stamped measurement data generated by itself. To the module Mod1-3 of the unit 1 and the module Mod2-3 of the unit 2.

  Similarly, the module Mod1-3 of the unit 1 uses the time-stamped measurement data generated by the other modules of the unit 1 and the time-stamped measurement data generated by itself as a signal S5-using the inter-unit bus. 2 to the module Mod0-3 of the unit 0 and the module Mod2-3 of the unit 2. The module Mod2-3 of the unit 2 uses a signal S5-3 that uses the inter-unit bus to generate the time-stamped measurement data generated by other modules of the unit 2 and the time-stamped measurement data generated by itself. Is transmitted to the module Mod0-3 of the unit 0 and the module Mod1-3 of the unit 1.

  Then, the module 0-3 of the unit 0 transmits the measurement data with the time stamp generated by the modules of the unit 1 and the unit 2 to the other modules of the unit 0 by the signal S6-1 using the intra-unit bus. .

  Similarly, the module 1-3 of the unit 1 transmits the measurement data with the time stamp generated by the modules of the unit 0 and the unit 2 to the other modules of the unit 1 by the signal S6-2 using the intra-unit bus. To do. Further, the module 2-3 of the unit 2 transmits the measurement data with the time stamp generated by the modules of the unit 0 and the unit 1 to the other modules of the unit 2 by the signal S6-3 using the intra-unit bus. .

  As a result, all modules in the system 10 can use time-stamped measurement data generated by other modules in the system 10.

  As described above, according to the data collection system 10 of the present embodiment, the measurement data generated by each module 100 can be used by each module 100 with a time stamp added.

10 data collection system 100 module 110 clock unit 120 time adjustment unit 130 measurement unit 140 data buffer 150 intra-unit communication unit 160 inter-unit communication unit 170 measurement data transmission / reception unit 180 time stamp addition unit 190 measurement data processing unit

Claims (3)

A plurality of modules each including a plurality of modules each provided with a clock unit for measuring time are connected to each other via an intra-unit bus, and at least a first unit among any of the modules constituting each unit and one of the modules that constitute the one of the modules constituting the second unit is a connected data acquisition system through the inter-unit bus,
One of the modules is defined as the time master,
A data collection system in which each module includes the following units.
1) If it is a time master, the time information based on its own clock part is transmitted by the intra-unit bus, and further, if connected to the inter-unit bus, the time information is transmitted by the inter-unit bus,
If not the time master, when the time information is received from the inter-unit bus, the time information is transmitted to another module connected to the intra-unit bus via the intra-unit bus, and the intra-unit bus When the time information is received from the unit, the time information is constituted by another module different from the own unit connected to the inter-unit bus via the inter-unit bus or a unit constituted by a module that is a time master. A time adjustment unit that transmits to at least one of the other modules that are not.
2) A measurement unit that starts measurement based on its own clock unit and acquires measurement data.
3) A time stamp adding unit that adds a time stamp based on the time of its own clock unit to the measurement data.
4) the measured data of its own that the time stamp is added through the unit bus own apparatus is connected to send to other modules,
When connected to the inter-unit bus, when the measurement data of another module with a time stamp added is received from the inter-unit bus, another module different from the own device via the intra-unit bus When the measurement data of the other module to which the time stamp is added is received from the internal bus, the measurement data of the own device to which the time stamp is added are automatically transmitted. Measurement data transmission / reception unit that transmits to other modules via the inter- unit bus connected to the machine. A plurality of modules each including a plurality of modules each provided with a clock unit for measuring time are connected to each other via an intra-unit bus, and at least a first unit among any of the modules constituting each unit Are modules constituting a data collection system in which any module constituting the second unit and any module constituting the second unit are connected via an inter-unit bus, and includes the following units.
1) Time information based on its own clock unit is transmitted to another module via the intra-unit bus, and when connected to the inter-unit bus, the time information is transmitted to the other module via the inter-unit bus. A time adjustment unit that transmits time information.
2) A measurement unit that starts measurement based on its own clock unit and acquires measurement data.
3) A time stamp adding unit that adds a time stamp based on the time of its own clock unit to the measurement data.
4) sends the measurement data of itself the time stamp is added in unit bus,
When connected to the inter-unit bus, the measurement data of other modules which the time stamp is added, upon receiving from said inter-unit bus, different from the module to the ship through the unit bus When the measurement data of the other module to which the time stamp is added is received from the internal bus, the measurement data of the own device to which the time stamp is added are automatically transmitted. Measurement data transmission / reception unit that transmits to other modules via the inter- unit bus connected to the machine. A plurality of modules each including a plurality of modules each provided with a clock unit for measuring time are connected to each other via an intra-unit bus, and at least a first unit among any of the modules constituting each unit Are modules constituting a data collection system in which any module constituting the second unit and any module constituting the second unit are connected via an inter-unit bus, and includes the following units.
1) When a module other than the time master receives time information from another module, it corrects its own clock unit based on the received time information, and when the module is connected to the inter-unit bus, When the time information is received from the inter-bus, it corrects its own clock unit based on the received time information, and the other time information is connected to the intra-unit bus via the intra-unit bus. When the time information is received from the intra-unit bus, the time information is another module or time master different from the own unit connected to the inter-unit bus via the inter-unit bus. A time adjustment unit that transmits to at least one of other modules that do not constitute the unit that the module constitutes.
2) A measurement unit that starts measurement based on its own clock unit and acquires measurement data.
3) A time stamp adding unit that adds a time stamp based on the time of its own clock unit to the measurement data.
4) sends the measurement data of itself the time stamp is added in unit bus,
When connected to the inter-unit bus, when the measurement data of another module with a time stamp added is received from the inter-unit bus, another module different from the own device via the intra-unit bus the transmitted measurement data, when said time stamp receives measurement data of the added other modules from unit bus of its own measurement data and the time stamp of this is added to the measurement data to, Measurement data transmission / reception unit that transmits to other modules via the inter- unit bus to which the device is connected.

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