JP3785137B2 - Measurement information transmitting apparatus and multi-point measurement information collecting system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a measurement information transmission apparatus and a multipoint measurement information collection system, and more particularly to a measurement information transmission apparatus and a multipoint measurement information collection system that efficiently collects physical quantities measured at multiple points.
[0002]
[Prior art]
As shown in FIG. 14, conventionally, in order to simultaneously measure a plurality of physical quantities, a measuring device 504 is arranged at each measurement point in the measurement area 500, and the physical quantities measured by each measuring apparatus 504 (hereinafter referred to as measurement data). ) Is often performed by physically stretching a transmission line 502 such as a cable or an optical fiber to the measurement station 506 that collects the Therefore, when a failure occurs in the transmission line 502, measurement data beyond the transmission line 502 where the failure has occurred may not be collected.
[0003]
In addition, a system that acquires measurement data in a non-contact manner using a laser is also conceivable, but in this case, there is no obstacle between the measurement station and the measurement device, and the installation location of the measurement device There is a problem that is limited.
[0004]
There is already a system for wirelessly transmitting measurement data, but there is a problem that the transmittable distance is limited to several tens of meters in order to use weak power that does not require a license under the Radio Control Law. .
[0005]
As a system for solving such a problem, a wireless communication system that transmits signals from a slave station to a master station via another slave station is known. (For example, see JP-A-10-247914.)
[0006]
[Patent Document 1]
Japanese Patent Laid-Open No. 10-247914
[0007]
[Problems to be solved by the invention]
However, in the above-described conventional wireless communication system, the main focus is on how to reliably transmit a signal transmitted from a given slave station, and information measured simultaneously at a plurality of arbitrary measurement points. There is no disclosure of a configuration that can quickly and efficiently collect data without compromising simultaneity.
[0008]
The present invention has been made to solve the above-described problems, and provides a measurement information transmitting apparatus and a multi-point measurement information collection system that can quickly and efficiently collect physical quantities measured simultaneously at multiple points with high certainty. With the goal.
[0009]
[Means for Solving the Problems]
  In order to achieve the above object, the measurement information transmitting apparatus of the present invention includes a measurement unit that measures a physical quantity,
  Receiving means for receiving information relating to a physical quantity measured by another measuring means different from the measuring means, which is generated and transmitted by the first other measuring information transmitting device;When a detecting unit that detects a device that can communicate with the own device and a collecting device that collects a physical quantity are detected by the detecting unit, the collecting device is selected, and the detecting unit can communicate with the own device. If the second other measurement information transmission device is detected, the second other measurement information transmission device closest to the collection device is selected from the detected second other measurement information transmission devices. A selection means for selecting a second other measurement information transmission device that is closer to the collection device and closest to the own device than the device or the own device;Based on the physical quantity measured by the measuring means of the device itself and the information on the physical quantity received by the receiving means, information on the physical quantity to be transmitted is generated,Device selected by the selection meansAnd transmitting means for transmitting to.
[0010]
  In the present invention, the physical quantity is measured by the measuring means of the measurement information transmitting apparatus. In addition, information relating to the physical quantity measured by another measuring unit different from the measuring unit is generated and transmitted by the first other measurement information transmitting device. The receiving means receives information on the transmitted physical quantity.The detecting means detects a device that can communicate with the own device. The selecting means selects the collecting apparatus when the detecting means detects the collecting apparatus that collects the physical quantity, but detects one or more second other measurement information transmitting apparatuses that can communicate with the own apparatus. Among the detected second other measurement information transmitting devices, the second other measurement information transmitting device closest to the collecting device or the second measuring information transmitting device closest to the collecting device and the closest to the own device. 2. Select another measurement information transmission device.The transmitting unit generates information on the physical quantity to be transmitted based on the physical quantity measured by the measuring unit of the own apparatus and the information on the physical quantity received by the receiving unit. Further, the transmission means transmits the generated information relating to the physical quantity to be transmitted to either the collection device that collects the physical quantity or the second other measurement information transmission device.
[0011]
  As a result, information on the physical quantity to be transmitted is generated and transmitted based on the physical quantity measured by the measuring unit of the own apparatus and the information on the physical quantity measured by the measuring unit of the other apparatus. By using a plurality of measurement information transmitting apparatuses, information on physical quantities that are simultaneously measured at multiple points can be transmitted quickly and efficiently. In other words, since the measurement unit of another device received is not simply transferred, the physical quantity measured by the own device can also be included in the information to be transmitted, thereby reducing the time required for information transmission. , Collection of measurement information becomes more efficient.
  In addition, when a collection device that collects physical quantities is detected, the collection device is selected and transmitted, so information on physical quantities measured simultaneously at multiple points is finally collected by the collection device. Therefore, it is possible to reliably collect information on physical quantities measured simultaneously at multiple points. In addition, since information is transmitted directly to the collection device if communication with the collection device is possible without going through another measurement information transmission device, information can be quickly transmitted to the collection device. Further, the transmission time can be shortened by transmitting to the second measurement information transmitting apparatus closer to the collecting apparatus.
[0012]
The physical quantity measured by the measuring means is not particularly limited, and may be temperature, humidity, or the like, or the vibration amount of the building due to an earthquake or wind.
[0013]
In addition, when the measured physical quantity is a plurality of physical quantities that are continuous in time series, the measurement time of each physical quantity should be included in the information related to the physical quantity to be transmitted so that the time at which each physical quantity is measured becomes clear. It may be. In addition, when the physical quantity is continuously measured in a time series at predetermined intervals, a measurement start time may be included instead of each measurement time. In addition, when the measuring unit moves, information to be transmitted may be included in the information to be transmitted so that the position of the measuring unit that measured the physical quantity becomes clear.
[0014]
The reception process by the reception unit and the transmission process by the transmission unit may be performed by wire or wirelessly. In the case of wired communication, for example, if a cable is stretched around in a net shape, even if a failure occurs in one cable, it is possible to transmit information relating to a physical quantity via another device.
[0015]
In the measurement information transmitting apparatus according to the present invention, the information on the physical quantity to be transmitted includes the physical quantity measured by the measuring means of the own apparatus, the physical quantity measured by the other measuring means, and the measuring means of the own apparatus. Information that can identify the physical quantity measured by the physical quantity measured by the other measuring means, and information that can identify the physical quantity measured by the measuring means of the device itself and the physical quantity measured by the other measuring means, Any one of them can also be used.
[0016]
As information that can identify the physical quantity, for example, a threshold value of the physical quantity level is determined in advance, an identifier is assigned to each level, and the identifier is included in the information to be transmitted according to the measured physical quantity level. If the transmission is performed, the amount of transmission data can be reduced and the transmission time can be shortened.
[0017]
Also, the difference between physical quantities measured by two different measuring devices can be used as information that can identify the physical quantities. That is, the information relating to the physical quantity received by the receiving means includes the physical quantity measured by the measuring means of the first other measurement information transmitting device and the measurement time of the physical quantity. Calculating the difference between the physical quantity measured by the measuring means of the first other measurement information transmitting apparatus and the physical quantity measured by the measuring means of the own apparatus at the same time as the measurement time of the measured physical quantity; The transmission is made up of either the physical quantity measured by the measuring means of its own apparatus or the physical quantity measured by the measuring means of the first other measurement information transmitting apparatus, and the calculated difference. It is also possible to generate and transmit information on the physical quantity that should be transmitted.
[0018]
That is, the difference between the physical quantity measured by the other device and the physical quantity measured by the own device at the same time as the time when the physical quantity was measured is calculated, and both the difference and the physical quantity measured by the own device are transmitted. To do. The collection device can derive the physical quantity itself measured by performing the back calculation from the difference. Similarly, when the difference and the physical quantity measured by another device are transmitted, the physical quantity measured by back-calculating from the difference can be derived. As a result, the amount of transmission data can be greatly reduced and the time required for transmission can be shortened compared to the case where physical quantities measured simultaneously at multiple points are transmitted as they are.
[0019]
In addition, when the physical quantity is a vibration amount in various places such as in a building, whether to transmit the difference or the measured vibration amount itself may be determined depending on the type of vibration. For example, when a building is shaken large and slowly (when the amplitude and period of vibration exceed a predetermined value), the measurement results at each measurement point often have the same phase, and the amplitude may be similar. Many. Therefore, in the case of such vibration, if the difference is calculated instead of the physical quantity itself and transmitted, the amount of data to be transmitted becomes smaller and the transmission efficiency increases.
[0021]
  The differenceWhen calculating and transmitting the minutes, the absolute value of the difference becomes smaller as the physical quantity measured by the device closer to the device itself. Therefore, if data is transmitted to a device closer to the device itself, the data to be transmitted The amount is reduced, and the transmission time can be shortened.
[0026]
Moreover, the multipoint measurement information collection system of the present invention includes a plurality of measurement information transmission devices according to the present invention, and a collection device that collects physical quantities measured by the plurality of measurement information transmission devices. Yes.
[0027]
According to such a configuration, it is possible to efficiently and quickly collect information on physical quantities measured simultaneously at multiple points.
[0028]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0029]
In the following, the case where the present invention is applied to a multipoint simultaneous measurement information collecting system using wireless will be described.
[0030]
FIG. 1 is a diagram schematically illustrating the overall configuration of a multipoint simultaneous measurement information collection system 10 according to the first embodiment.
[0031]
The multi-point simultaneous measurement information collecting system 10 is a system for measuring continuous vibration amounts (for example, vibration amounts due to winds, etc.) at a plurality of points of the building 50 at the same time, and includes a plurality of stations 20 and one measurement station. 40. The station 20 is disposed at each measurement point of the building 50, and is provided with a measurement device 21 (see FIG. 2). The measuring device 21 measures the vibration amount and wirelessly transmits it to the measuring device 21 or the measuring station 40 of another station 20. The measurement station 40 collects the vibration amount measured by the measurement device 21 of each station 20. Hereinafter, the measured vibration amount is referred to as measurement data.
[0032]
FIG. 2 is a block diagram illustrating a functional configuration of the measurement device 21. As shown in the drawing, the measuring device 21 is provided with a sensor 24 and a CPU 22. Further, the CPU 22 is connected to a data receiving device 32, a local station data acquisition device 34, another sensor information memory 36, a local sensor information memory 37, and a data transmission device 38 via a bus. The sensor 24 measures the vibration amount at predetermined time intervals. The local station data acquisition device 34 acquires measurement data of the sensor 24. The data reception device 32 receives various signals, measurement data, and the like from other measurement devices 21. The other sensor information memory 36 stores the measurement data received by the data receiving device 32, and the own sensor information memory 37 stores the measurement data acquired by the own station data acquisition device 34. The data transmission device 38 transmits various signals, or generates and transmits data for transmission based on the measurement data stored in the other sensor information memory 36 and the own sensor information memory 37. The CPU 22 controls the operations of these devices.
[0033]
Furthermore, the antenna 26 is connected to the data receiving device 32 and the data transmitting device 38, and data transmission / reception is performed wirelessly via the antenna 26. The data transmission device 38 does not transmit the measurement data at a variable length, but transmits a packet for each predetermined packet size.
[0034]
FIG. 3 is a diagram showing a specific example of the flow of measurement data between a plurality of stations. Here, in order to simplify the description, the station (A) 20a, the station (B) 20b, the station (C) 20c, the station (D) 20d, the station (E) 20e, and the station (F) 20f It is assumed that only 6 stations are arranged in the building 50.
[0035]
As shown in the figure, a station number corresponding to the distance from the measurement station 40 is assigned to each station. As the assigned station number becomes smaller, the station becomes closer to the measuring station 40. In FIG. 3, the station (A) 20 a is located at the farthest distance from the measurement station 40. Note that a station number is also assigned to the measurement station 40 and 0 is set.
[0036]
In each station, the vibration amount (measurement data) measured by the sensor 24 of the measurement device 21 provided in each station is stored in the own sensor information memory 37 of the measurement device 21 together with the measurement time. Illustration of measurement data and measurement time at the station (D) 20d, the station (E) 20e, and the station (F) 20f is omitted. The time data of each station is synchronized in advance, and the sampling time interval at which each station acquires measurement data is set in advance. Moreover, the solid line arrow in the figure indicates the flow of measurement data.
[0037]
FIG. 4 is a table showing an outline of signals transmitted and received by each measuring device 21 between the stations. As shown in the figure, the “reception permission request signal” is a signal that is transmitted to all stations in advance in order to determine the transmission destination when transmitting measurement data. Number (source station number).
[0038]
“Reception permission signal” is a signal for transmitting from the station that has received the reception permission request signal to the station that is the transmission source of the reception permission request signal that the device is ready to receive measurement data. And includes a reception permission flag, a station number of the own station (transmission source station number), and a transmission source station number (transmission destination station number) of the reception permission request signal.
[0039]
The “data transmission signal” is a signal generated by the data transmission device 38 based on the measurement data and transmitted to a station selected from the stations that transmitted the reception permission signal. The data transmission signal is generated at each station and transmitted in order, so that the measurement data at each measurement point can be finally collected at the measurement station 40.
[0040]
Specific contents of the data transmission signal are shown in FIGS. 5 (a) to 5 (c). FIG. 5A shows a configuration of a data transmission signal transmitted from the station (A) 20a to the station (B) 20b. FIG. 5B shows a configuration of the station (B) 20b to the station (C) 20c. FIG. 5C shows the configuration of the transmission signal of data transmitted from the station (C) 20c to the station (E) 20e.
[0041]
As shown in the figure, the data transmission signal is measured from a data transmission start flag 60, a transmission source station number 62, a transmission destination station number 64, a measurement data measurement start time 66, and a measurement start time 66. The number of measurement data 68, measurement data content 70, and data transmission end flag 69 are included.
[0042]
The measured data content 70 is configured by the number of stations 72 where the measurement is performed and the number of vibrations 74 actually measured as indicated by the number 68. The measurement data content 70 is configured for each station.
[0043]
For example, in FIG. 5A, the measurement data content 70 is only the data of the station (A) 20a, but in FIG. 5B, the measurement of the station (A) 20a received by the station (B) 20b. The content of data and the content of measurement data of the station (B) 20b itself are configured as measurement data content 70. Similarly in FIG. 5C, the contents of the measurement data of the station (C) 20c itself are measured in addition to the contents of the measurement data of the station (A) 20a and the station (B) 20b received by the station (C) 20c. The data content 70 is configured.
[0044]
Next, the flow of processing executed by the measuring device 21 of each station 20 will be described in detail using the flowcharts of FIGS.
[0045]
Various determination / storage processes in the following flowcharts are performed by the CPU 22, various signal reception processes are performed by the data reception device 32 via the antenna 26, and various signal transmission processes are performed by the data transmission device 38 by the antenna. 26.
[0046]
FIG. 6 is a flowchart showing a flow of processing for acquiring measurement data of the local station, which is executed by the local data acquisition apparatus 34 of the measurement apparatus 21 provided in the station 20.
[0047]
In step 100, the trigger is made to wait. This trigger is a data acquisition trigger that is activated when a sampling time interval for acquiring measurement data from the sensor 24 elapses. In step 102, it is determined whether a data acquisition trigger has been activated. If it is determined that the trigger is not activated, the sampling time interval has not elapsed, and the process returns to step 100. If it is determined that the trigger is activated, measurement data is acquired from the sensor 24 of the own station and stored in the own sensor information memory 37 in step 104.
[0048]
In this way, the vibration amount continuously measured by the sensor 24 is sequentially stored in the own sensor information memory 37 at predetermined sampling time intervals. Note that the local station data acquisition device 34 has an AD conversion function, and converts measurement data from the sensor 24 into a digital signal. The converted digital signal is stored in the own sensor information memory 37 under the control of the CPU 22. At that time, the self-sensor information memory 37 stores measurement time and measured vibration amount data.
[0049]
FIG. 7 is a flowchart showing a flow of processing for receiving measurement data of another station.
[0050]
In step 200, the measuring device 21 stands by in a receivable state. In step 202, it is determined whether or not a reception permission request signal transmitted from another station has been detected. If it is determined that the reception permission request signal has not been detected, the standby state of step 200 is continued. If it is determined that the reception permission request signal has been detected, in step 204, the operating state of the device itself is confirmed, and it is determined whether or not measurement data can be received. If it is determined that reception is impossible, the process returns to the standby state in step 200. If it is determined that reception is possible, in step 206, a reception permission signal is returned to the transmitting station of the reception permission request signal.
[0051]
In step 208, it is determined whether or not a transmission start signal (a so-called handshake request) transmitted from the transmitting station of the reception permission request signal has been detected. If it is determined that the transmission start signal has not been detected, it is determined in step 210 whether or not a predetermined standby time has been exceeded. If it is determined that the waiting time has not been exceeded, the process returns to step 208. If it is determined that the standby time has been exceeded, the process returns to step 200 and waits in a receivable state.
[0052]
If it is determined in step 208 that a transmission start signal has been detected, then in step 212, after a handshake with the transmitting station is established, measurement data measured by another station is received. The received measurement data is stored in the other sensor information memory 36. When the reception of the measurement data is completed in step 214, the process returns to step 200 and enters a standby state.
[0053]
FIG. 8 is a flowchart showing a flow of processing for transmitting measurement data.
[0054]
In step 300, it is determined whether or not the amount of measurement data stored in the other sensor information memory 36 and the own sensor information memory 37 has exceeded a preset packet size. If it is determined that the packet size has not been exceeded, the standby state is maintained. If it is determined that the packet size has been exceeded, a reception permission request signal is transmitted to all stations in step 302.
[0055]
In step 304, it is determined whether or not a reception permission signal transmitted from another station has been detected. If a reception permission signal is detected, the transmitting station of the detected reception permission signal is a station capable of receiving measurement data. Therefore, in step 306, the station number of the transmitting station is stored in a predetermined storage area (FIG. (Not shown). In step 308, it is determined whether a predetermined standby time has been exceeded. If it is determined that the waiting time has not been exceeded, the process returns to step 304. If it is determined in step 304 that the reception permission signal has not been detected, the process proceeds to step 308. In addition, the station number is memorize | stored as a station which can transmit measurement data from all the transmitting stations of the reception permission signal received during standby time.
[0056]
After the waiting time has elapsed in step 308, in step 310, the station with the smallest station number (the station closest to the measuring station 40 or the measuring station 40 itself) is selected from the station numbers that can be transmitted stored in step 306. Selected. In step 312, a transmission start signal is transmitted to the selected station. After the handshake is established, in step 314, the measurement data of the other station stored in the other sensor information memory 36 by the data transmission device 38 and Based on the measurement data of the own station stored in the sensor information memory 37, a data transmission signal as shown in FIG. 5 is generated and transmitted to the selected station. After the transmission, the transmitted data is deleted from the other sensor information memory 36 and the own sensor information memory 37.
[0057]
The generation of the data transmission signal will be specifically described. Since the station (A) 20a is located farthest from the measurement station 40, measurement data from other stations is not received. Therefore, when measurement data is transmitted from the station (A) 20a to the station (B) 20b, a data transmission signal including only the measurement data of the own station is generated as shown in FIG. And transmitted to the station (B) 20b.
[0058]
When the measurement data is transmitted from the station (B) 20b to the station (C) 20c, as shown in FIG. 5B, the received measurement data of the station (A) 20a and the station (B) A data transmission signal including the measurement data of 20b itself is generated and transmitted to the station (C) 20c.
[0059]
Further, erasure of data after data transmission is performed after confirming that the data has been reliably transferred to the destination station. For example, when measurement data cannot be transmitted due to an abnormality in the transmission destination station 20 (that is, the transmission destination measurement device 21) during measurement data transmission, another nearby station (stored in step 306) is stored again. The measured data is transferred to the measuring device 21 of the station number with the next smallest station number), and the station 20 of the measuring device 21 that has failed is avoided. In this way, even when the measurement device 21 of any station 20 fails, all measurement data other than the failed station can be collected.
[0060]
In this embodiment, the measurement data transmission timing is set when the measurement data exceeds the packet size. However, the transmission timing is not particularly limited. For example, the measurement data of the own station is acquired. It may be after a predetermined time has elapsed or when a certain amount of capacity is accumulated in the memory.
[0061]
Next, a specific example of processing for each station when the measurement data is transmitted from the station (C) 20c to the station (E) 20e as shown in FIG. 3 will be described with reference to the corresponding diagram of FIG. Note that each process shown below is performed by the measurement device 21 provided in each station 20 as described above, and detailed description thereof is omitted.
[0062]
First, in step 400, the reception permission request signal is transmitted from the station (C) 20c to all stations (corresponding to step 302 in FIG. 8). In steps 402 and 404, the received reception permission request signal is received by the station (D) 20d and the station (E) 20e located in the communication area of the station (C) 20c (corresponding to FIG. 7, step 202yes). ).
[0063]
In steps 406 and 408, if the station (D) 20d and the station (E) 20e are ready for reception, the station (D) 20d and the station (E) 20e transmit a reception permission signal to the station (C) 20c (see FIG. Equivalent).
[0064]
In step 410, the station (C) 20c receives the reception permission signal from the station (D) 20d and the station (E) 20e and stores the station number (corresponding to steps 304yes and 306 in FIG. 8). ).
[0065]
In step 412, the station (F) 20f located outside the communication range of the station (C) 20c cannot receive the reception permission request signal from the station (C) 20c, and the standby state is maintained (FIG. 7). Equivalent to step 202no).
[0066]
Even if the station (F) 20f is within the communication range of the station (C) 20c, if the communication is impossible due to an abnormality, the reception permission request signal cannot be received in the same manner, and the standby state Maintained.
[0067]
In step 414, the station (C) 20c selects the station with the lowest number among the stored station numbers (that is, the station closest to the measurement station) (corresponding to step 310 in FIG. 8). As shown in FIG. 3, since the station (D) 20d has a station number of 4 and the station (E) 20e has a station number of 2, the station (E) 20e having a smaller station number is selected. A transmission start signal is transmitted from the station (C) 20c to the selected station (E) 20e (corresponding to step 312 in FIG. 8).
[0068]
In step 416, the station (D) 20d returns to the standby state because it does not receive the transmission start signal from the station (C) 20c (corresponding to steps 208no and 210yes in FIG. 7).
[0069]
In step 418, the station (E) 20e receives the transmission start signal from the station (C) 20c (corresponding to step 208yes). In step 420, the station (C) 20c generates a data transmission signal including the contents of the measurement data of the station (A), the station (B), and the station (C) as shown in FIG. , To the station (E) 20e (corresponding to step 314 in FIG. 8).
[0070]
In step 422, the station (E) 20e receives the data transmission signal from the station (C) 20c (corresponding to step 212 in FIG. 7). In step 424, the station (C) 20c deletes the transmitted content from the other sensor information memory 36 and its own sensor information memory 37 (corresponding to step 314 in FIG. 8), and returns to the standby state in step 426 (FIG. 8 corresponds to step 300).
[0071]
In step 428, the station (E) 20e that has completed reception transmits a reception permission request signal to the next station (all stations in communication range with the station (E) 20e).
[0072]
In this way, the station closer to the measurement station 40 sequentially transmits the measurement data of the own station together with the measurement data of the other station transmitted from the station far from the measurement station 40 than the own station. Thus, the physical quantity (vibration quantity in the present embodiment) that is continuously measured at multiple points is transmitted to the measurement station quickly and efficiently. Moreover, since the station which can communicate beforehand is confirmed and transmitted at the time of transmission, measurement data are collected with high certainty.
[0073]
In the first embodiment described above, the example in which the measured vibration amount itself is included in the data transmission signal and transmitted is described. However, in the following description, the difference between the measured vibration amounts is calculated and transmitted. Embodiments will be described.
[0074]
FIG. 10 is a diagram schematically showing a state in which the multipoint simultaneous measurement information collection system 10 is installed in a 12-story building in the second embodiment. As in the first embodiment described above, the present system is configured by providing a plurality of stations 20 provided with measuring devices 21 and measuring stations 40 in a 12-story building. The functional configuration of the measuring device 21 is the same as that of the first embodiment described above.
[0075]
Note that each process shown below is performed by the measurement device 21 provided in each station 20 as in the first embodiment, and detailed description thereof is omitted.
[0076]
Furthermore, as in the first embodiment, the time data of each station is synchronized in advance, and the sampling time interval at which each station acquires measurement data is set in advance.
[0077]
FIG. 11 is a diagram showing a specific example of the flow of measurement data between a plurality of stations. Here, it is assumed that one station 20 is arranged for each floor. Station (A) 20a is located on the 12th floor, station (B) 20b is located on the 11th floor, station (C) 20c is located on the 10th floor, and station 21d is located on the 9th floor.
[0078]
Each station sequentially transmits the measurement data of its own station and the received other station, but transmits the difference data with the data of its own station for the received measurement data of the other station.
[0079]
Usually, when measurements are made for the purpose of building health monitoring, vibrations measured by each measuring device are often in a primary mode (a mode in which the building slowly and greatly shakes). In the first order mode, the phase and amplitude of the vibrations are very similar. FIG. 12A is a graph showing an example of the vibration amount in the primary mode measured by the measurement devices 21 on the 12th floor and the 11th floor. As is clear from the figure, the vibration on the 12th floor Very similar to the vibration of the 11th floor directly below. FIG. 12B is a graph showing the difference between the vibration amounts of the 12th floor and the 11th floor, and as is clear from the figure, the absolute value of the difference data amount compared to the vibration frequency itself of FIG. 12A. The value is small. Therefore, when transmitting the data on the 12th floor, instead of transmitting the vibration amount on the 12th floor as it is, by calculating and transmitting the difference from the vibration amount on the 11th floor, the transmission data has a smaller number of bits. The transmission bit can be reduced.
[0080]
Further, since the closer the station to the own station, the more similar the vibration is. Therefore, if the signal is transmitted to the station closest to the own station, that is, the station on the floor immediately below, the difference can be greatly reduced. Accordingly, in the present embodiment, the predetermined storage area (not shown) of the measuring device 21 of each station is “12th floor (station (A)) → 11th floor (station (B)) → 10th floor (station ( C)) → 9 floor (station (D))..., A transfer route table described in order from the upper floor to the floor immediately below is preset (not shown). Transfers (transmits) data to a station that can communicate with the local station and is closest to the local station according to the route set in the transfer route table.
[0081]
FIG. 13A to FIG. 13C are diagrams showing specific contents of the data transmission signal generated and transmitted by each station. FIG. 13A shows the configuration of a data transmission signal transmitted from the station (A) 20a to the station (B) 20b. FIG. 13B shows the configuration of the station (B) 20b to the station (C) 20c. FIG. 13C shows the configuration of a data transmission signal transmitted from the station (C) 20c to the station (D) 20d.
[0082]
As shown in the figure, the transmission signal was measured from a data transmission start flag 80, a transmission source station number 82, a transmission destination station number 84, a measurement data measurement start time 86, and a measurement start time 86. It consists of the number of measurement data 88, measurement data contents 90, and a data transmission end flag 89. The measurement data content 90 is composed of the number 92 of the station that has performed the measurement and the measurement data 94 for each station continuously by the number of measurement data 88. The overall configuration is the same as that of the first embodiment.
[0083]
However, regarding the measurement data 94 of the other station, the difference obtained by subtracting the data of the own station from the data of the immediately preceding station is not the vibration amount itself, but becomes the measurement data 94.
[0084]
Hereinafter, details of processing in each station according to the present embodiment will be described with reference to FIGS. 11 and 13.
[0085]
First, in the station (A) 20a, measurement data (A_T1~ A_T10) Is acquired from the sensor 24 of the local station and stored in the local sensor information memory 37. Since this process is the same as that of the first embodiment, a description thereof will be omitted. In the station (A) 20a, the transmission route table is referred to read out the transmission destination (station (B)). Then, a data transmission signal as shown in FIG. 13A is generated from the measurement data stored in the own sensor information memory 37 and transmitted to the transmission destination station (B) 20b. Since the station (A) 20a is installed at a measurement point on the 12th floor at the final end, measurement data of other stations is not stored. Accordingly, only the measurement data of the own station is transmitted to the station (B) 20b.
[0086]
In the station (B) 20b, the measurement data (B_T1~ B_T10) Is acquired from the sensor 24 of the local station and stored in the local sensor information memory 37. Further, the measurement data content 90 of the station (A) included in the data transmission signal received from the station (A) 20 a is stored in the other sensor information memory 36.
[0087]
The station (B) 20b refers to the transfer route table and reads out the transmission destination (station (C)). Then, a data transmission signal as shown in FIG. 13B is generated from the measurement data stored in the other sensor information memory 36 and the own sensor information memory 37 and transmitted to the transmission destination station (C) 20c. Is done. As shown in FIG. 13B, for the measurement data 94 of the station (A) 20a, the difference between the station (A) measured at the same time as the data of the own station and the data of the own station is calculated. Send only the difference.
[0088]
In the station (C) 20c, the measurement data (C_T1~ C_T10) Is acquired from the sensor 24 of the local station and stored in the local sensor information memory 37. Further, the measurement data content 90 of the station (A) and the station (B) included in the data transmission signal received from the station (B) 20 b is stored in the other sensor information memory 36.
[0089]
In the station (C) 20b, the transmission route table is referred to read out the transmission destination (station (D)). Then, a data transmission signal as shown in FIG. 13C is generated from the measurement data stored in the other sensor information memory 36 and the own sensor information memory 37 and transmitted to the transmission destination station (D) 20d. Is done. As shown in FIG. 13 (c), as for the vibration amount of the other station measured at the same time as the data of the own station, the difference is transmitted in the same manner as the station (B) described above. The station (C) calculates the difference between the measurement data of the station (B) and the measurement data of the own station, and the measurement data of the station (A) is already differential data when it is received. The data transmission signal is formed and transmitted using the received difference data as it is.
[0090]
In this way, transmission is performed in order, and finally all measurement data is transmitted to the measurement station 40. The measurement station 40 restores the measured actual vibration amount by adding the vibration amount of the station immediately below that station to the received difference data. The vibration amount of the station immediately below is sequentially added to all the difference data, so that the vibration amount of all the stations can be finally restored.
[0091]
If an abnormality occurs in a station on any floor during data transmission, transmission to the station where the abnormality occurred is avoided, and data is transmitted to the station immediately below that station. May be.
[0092]
In this embodiment, the vibration amount itself is transmitted for the measurement data of the own station, and the difference data is transmitted for the measurement data of the other station. However, the difference data is transmitted for the measurement data of the own station. However, the vibration amount itself may be transmitted for the measurement data of other stations.
[0093]
In this way, by transmitting differential data instead of the vibration amount itself, the vibration amount of other stations can be expressed with a smaller number of bits, the amount of transmitted data is reduced, and the data transfer efficiency is improved. .
[0094]
Also in the first embodiment described above, the data of other stations may be transmitted as a difference as in the second embodiment. Also in the second embodiment, the physical quantity may be transmitted as it is for the data of other stations as in the first embodiment.
[0095]
Further, the present invention is not limited to the above-described embodiment, and can be applied to various systems and apparatuses for collecting data measured at multiple points.
[0096]
【The invention's effect】
As described above, according to the present invention, information on the physical quantity to be transmitted is generated and transmitted based on the physical quantity measured by the measuring unit of the own apparatus and the information on the physical quantity measured by the measuring unit of the other apparatus. Therefore, it is possible to quickly and efficiently collect physical quantities measured simultaneously at multiple points.
[Brief description of the drawings]
FIG. 1 is a diagram schematically showing an overall configuration of a multipoint simultaneous measurement information collecting system in a first embodiment.
FIG. 2 is a block diagram showing a functional configuration of a measuring device.
FIG. 3 is a diagram showing a specific example of a flow of measurement data between a plurality of stations in the first embodiment.
FIG. 4 is a table showing an outline of signals transmitted and received between the stations.
FIG. 5 is a diagram showing specific contents of a data transmission signal.
FIG. 6 is a flowchart showing a flow of processing for acquiring measurement data of the own station.
FIG. 7 is a flowchart showing a flow of processing for receiving measurement data of another station.
FIG. 8 is a flowchart showing a flow of processing for transmitting measurement data.
FIG. 9 is a correspondence diagram of a processing flow for each station.
FIG. 10 is a diagram schematically showing a state in which a multipoint simultaneous measurement information collection system is installed in a 12-story building in the second embodiment.
FIG. 11 is a diagram showing a specific example of the flow of measurement data between a plurality of stations in the second embodiment.
FIG. 12 (a) is a graph showing the amount of vibration in the primary mode measured by the 12th and 11th floor measuring devices, and FIG. 12 (b) is the 12th and 11th floors. It is the graph which showed the difference of the amount of vibrations.
FIG. 13 is a diagram showing specific contents of a data transmission signal when a difference is transmitted.
FIG. 14 is a diagram schematically showing the overall configuration of a conventional multipoint measurement information system.
[Explanation of symbols]
10 Multi-point measurement information collection system (Multi-point measurement information collection system)
20 stations
21 Measuring device (Measurement information transmitter)
22 CPU
24 sensors (measuring means)
32 Data receiving device (receiving means)
34 Local data acquisition device
36 Other sensor information memory
37 Self-sensor information memory
38 Data transmission device (transmission means)
40 Measuring station (collector)

Claims (5)

A measuring means for measuring physical quantities;
Receiving means for receiving information relating to a physical quantity measured by another measuring means different from the measuring means, which is generated and transmitted by the first other measuring information transmitting device;
Detecting means for detecting a device capable of communicating with the own device;
When a collecting device that collects physical quantities is detected by the detecting means, the collecting device is selected, and one or more second other measurement information transmitting devices that can communicate with the own device are detected by the detecting means. In this case, the second other measurement information transmission device detected is closer to the collection device than the second other measurement information transmission device closest to the collection device or to the collection device. Selecting means for selecting a second other measurement information transmitting device closest to the device;
Based on the physical quantity measured by the measuring means of the device itself and the information on the physical quantity received by the receiving means, information on the physical quantity to be transmitted is generated and transmitted to the apparatus selected by the selecting means Sending means to
Measurement information transmission device including   The information on the physical quantity to be transmitted includes the physical quantity measured by the measurement unit of the own apparatus, the physical quantity measured by the other measurement unit, information that can identify the physical quantity measured by the measurement unit of the own apparatus, and the other The physical quantity measured by the measuring means, and the information that can identify the physical quantity measured by the measuring means of the device itself and the physical quantity measured by the other measuring means. Measurement information transmitter. The information relating to the physical quantity received by the receiving means includes the physical quantity measured by the measuring means of the first other measurement information transmitting device, and the measurement time of the physical quantity,
The transmitting means includes a physical quantity measured by the measuring means of the first other measurement information transmitting apparatus and a physical quantity measured by the measuring means of the own apparatus at the same time as the measurement time of the measured physical quantity. The difference is calculated, and is configured by one of the physical quantity measured by the measuring unit of the own apparatus and the physical quantity measured by the measuring unit of the first other measurement information transmitting apparatus, and the calculated difference. The measurement information transmitting apparatus according to claim 1, wherein information related to the physical quantity to be transmitted is generated and transmitted. In the middle of transmission of information on the physical quantity to be transmitted to the selected second other measurement information transmission device, when an abnormality occurs in the second other measurement information transmission device and transmission becomes impossible, The selection unit again selects another second other measurement information transmission device, and the transmission unit transmits information on the physical quantity to be transmitted to the second other measurement information transmission device selected again. The measurement information transmitting device according to any one of claims 1 to 3 . A plurality of measurement information transmitting devices according to any one of claims 1 to 4,
A collection device for collecting physical quantities measured by the plurality of measurement information transmission devices;
Multi-point measurement information collection system including

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