JP2011223209A - Wireless communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wireless communication system which is capable of having a normal wireless communication amongst a master station, a slave station and a relay station located inside a building without setting up a special station such as a response monitoring station, other than master, slave and relay stations.SOLUTION: The slave stations 1, 2 and the relay station 3 consist of wireless sensors to measure the state quantity, such as power consumption, individually. At the time of the wireless communication between respective stations, including the master station 4, the slave stations 1, 2 and the relay station 3, the reference time for the communication time interval (10 Nsecond:N=1, 2, ...) between the stations is set to 10 seconds in advance, in order for the timing of communications executed between the stations to be different from each other. In addition, at each measurement time of the multiple state quantities, state quantity acquisition time, which is the time to obtain all of the multiple state quantities, is set at 10 minutes in advance. The accumulated time for 10 seconds of reference time corresponding to the total time for communications between the stations is set to less than 10 minutes, which is the acquisition time for the state quantity per session.

Description

  The present invention includes a master station and a slave station, each of which includes a wireless device, and a relay station that relays between the master station and the slave station, and performs wireless communication between the master station, the slave station, and the relay station. The present invention relates to a wireless communication system.

  There exists a thing shown by patent document 1 as this kind of prior art. This conventional technology includes a master station, a slave station, and a relay station that relays between the master station and the slave station, each of which includes a wireless device, and normal wireless communication between the master station, the slave station, and the relay station. It has a configuration equipped with a response monitoring station composed of a radio that monitors whether or not it is being performed.

JP-A-9-18402

  In the conventional technology described above, since the response monitoring station is provided in addition to the master station, the slave station, and the relay station, the number of wireless devices tends to increase. Therefore, when a radio device including a master station, a slave station, a relay station, and a response monitoring station is installed in a building such as a building, this installation work tends to be complicated. As a result, the maintenance and inspection work of the wireless device tends to be complicated. Furthermore, the production cost of the wireless communication system including the master station, the slave station, the relay station, and the response monitoring station tends to be high.

  The present invention has been made from the actual situation in the prior art described above, and its purpose is not to provide a special station such as a response monitoring station in addition to a master station, a slave station, and a relay station, but also to a parent station arranged in a building. An object of the present invention is to provide a wireless communication system capable of realizing normal wireless communication among stations, slave stations, and relay stations.

  In order to achieve the above object, a radio communication system according to the present invention comprises a master station and a slave station each consisting of a radio, and a relay station that relays between the master station and the slave station. In the wireless communication system that enables wireless communication between the slave station and the relay station, each of the master station, the slave station, and the relay station is installed in the same building, and the slave station and the relay station The relay station is composed of wireless sensors that individually measure a plurality of state quantities in the building, and in the wireless communication between the master station, the slave station, and the relay station, the master station, the slave station, A reference time that prescribes a communication time interval between the master station, the slave station, and the relay station is set in advance so that times of communication performed between the relay stations are different from each other, The master station, the slave station, and the relay station The communication is performed every reference time, and at the time of each measurement for all of the plurality of state quantities, it is a time that enables acquisition of all of the plurality of state quantities. When a state quantity acquisition time is set in advance, and one or more communications made from the transmission source to the transmission destination at the same time among the master station, the slave station, and the relay station are counted as one communication The relationship between the reference time and the state quantity acquisition time is set so that the accumulated time of the reference time corresponding to the total number of communications is shorter than the state quantity acquisition time for each time. Yes.

  In the present invention configured as described above, state quantities such as power consumption, amount of water used, and amount of gas used in a building are measured by a slave station or a relay station, and an integrated value of the state quantities is directly measured from the slave station. Wireless communication is performed from the slave station to the master station via the relay station, or from the relay station that also serves as the slave station to the master station. Therefore, the integrated value of all the state quantities measured in the building can be grasped at the master station.

  In addition, a reference time that defines the communication time interval between the master station, slave station, and relay station placed in the building is set in advance, and communication between the master station, slave station, and relay station is performed at each reference time. Therefore, the communication times can be made different in the wireless communication between the master station, the slave station, and the relay station. That is, normal communication can be realized without causing communication abnormality such as interference. Therefore, it is possible to realize normal wireless communication between the master station, the slave station, and the relay station arranged in the building without providing a special station such as a response monitoring station in addition to the master station, the slave station, and the relay station. Can do.

  Further, the accumulated reference time corresponding to the total number of communications when one or more communications made from the transmission source to the transmission destination are counted as one communication at the same time among the master station, the slave station, and the relay station. By setting the relationship between the reference time and the state quantity acquisition time in advance so that the state quantity acquisition time for each time is sufficiently long compared to the time, a new state is created in the building. When trying to install additional slave stations or relay stations to measure the quantity, the number of additional slave stations or relay stations to be installed is set to the state quantity acquisition time and the master station, slave station, If the number of communication between the relay stations is limited to the number corresponding to the accumulated time of the reference time corresponding to the number of communication between the relay stations, without changing the preset reference time and state quantity acquisition time, in the master station, The integrated value of all state quantities measured in the building It is possible to grasp the easy. That is, the integrated value of all the state quantities in the building can be obtained at the master station without requiring a significant system change.

  The wireless communication system according to the present invention is characterized in that, in the above invention, the building has a plurality of floors, and the master station is installed on one floor of the plurality of floors. Yes.

  In the wireless communication system according to the present invention, in the above invention, the master station stores a current time recognized by the master station in a communication format, and the slave station measures the slave station in the communication format. The relay station stores a time obtained by adding the communication time interval from a current time recognized by the master station to a communication format, and a state quantity measured by the relay station. It is said.

  The wireless communication system according to the present invention is the wireless communication system according to the present invention, wherein at least the slave station of the slave station and the relay station is operated by a battery, the communication format of the slave station, and the relay station Each of the communication formats is characterized by storing its current battery voltage.

  Further, in the wireless communication system according to the present invention, in the above invention, the master station includes first determination means for determining presence / absence of reception from the slave station and the relay station, the slave station, and the relay station. And a second judging means for judging whether or not at least one of the batteries has a life that requires replacement, and when the first judging means judges that there is no reception, or the second judging means When it is determined that the service life is required to be replaced, an abnormality report is sent to the dispatch bases of maintenance personnel who are located outside the building and perform maintenance inspection work on the master station, the slave station, and the relay station It has a reporting means.

  The present invention relates to a master station, a slave station, which is a radio station disposed in a building, a slave station including a wireless sensor that individually measures a plurality of state quantities in the building, and a relay station. The reference time for defining the communication time interval between the master station, the slave station, and the relay station is set in advance so that the times of communication performed between the relay stations are different from each other. Without providing a special station such as a response monitoring station in addition to the station, the slave station, and the relay station, normal wireless communication between the master station, the slave station, and the relay station arranged in the building can be realized. As a result, installation work for installing a radio device including a master station, a slave station, and a relay station in one building becomes easier than before. Accordingly, it is possible to improve the efficiency of maintenance and inspection work of a radio device composed of a master station, a slave station, and a relay station arranged in the same building as compared with the conventional art. Furthermore, the production cost of a wireless communication system including a master station, a slave station, and a relay station installed in the same building can be reduced as compared with the related art.

  In addition, the present invention pre-sets a state quantity acquisition time that is a time enabling acquisition of all of the plurality of state quantities at the time of each measurement for all of the plurality of state quantities, , The cumulative time of the reference time corresponding to the total number of communications when counting one or more communications made from the transmission source to the transmission destination at the same time between the slave station and the relay station as one communication time, The relationship between the reference time and the state quantity acquisition time is set so as to be shorter than the state quantity acquisition time for each time. Therefore, when a new slave station or relay station that measures state quantities is to be installed in the building, the number of slave stations or relay stations that are additionally installed is determined as the state quantity acquisition time. The reference time and the state quantity acquisition time set in advance are changed if the number of times corresponding to the accumulated time of the reference time corresponding to the number of communications between the master station, the slave station, and the relay station is suppressed to a number corresponding to the time difference. Therefore, the integrated value of all the state quantities measured in the same building can be easily grasped in the master station. That is, the integrated value of all the state quantities in the building can be obtained at the master station without requiring a significant system change. Thereby, the cost required for adding a slave station or a relay station can be minimized.

It is a figure which shows schematic structure of 1st Embodiment of the radio | wireless communications system which concerns on this invention. It is a figure which shows an example of the arrangement | positioning form in the building of the main | base station provided in this embodiment, a sub_station | mobile_unit, and a relay station. It is a figure which shows an example of the communication format with which this embodiment is equipped. It is a figure which shows an example of the transmission sequence in this embodiment. It is a flowchart which shows the process sequence in the control part etc. of the main | base station in this embodiment.

  Embodiments of a wireless communication system according to the present invention will be described below with reference to the drawings.

  FIG. 1 is a diagram showing a schematic configuration of a first embodiment of a wireless communication system according to the present invention.

  As shown in FIG. 1, the wireless communication system according to the present embodiment is a relay that relays between a master station 4 and slave stations 1 and 2, and between a master station 4 and a slave station 2. Each station 3 is located in the same building 6.

  Each of the slave stations 1 and 2 and the relay station 3 includes a wireless sensor that individually measures a plurality of state quantities such as power consumption, amount of water used, and amount of gas used in the building 6 and is operated by a battery. For example, the slave station 1 is connected to a meter with pulse transmission 20 that measures the amount of water used, and the slave station 2 is connected to a measurement target power line 21 in order to measure current consumption for calculating power consumption. The relay station 3 is connected to a pulse transmission meter 22 for measuring the amount of gas used.

  The slave stations 1 and 2 and the relay station 3 have the same configuration. For example, the slave station 1 is connected to the current input unit 1a capable of inputting a consumption current for calculating power consumption, and the pulse input unit that is connected to the meter 20 with pulse transmission and inputs a pulse output from the meter 20 with pulse transmission. 1b, and an external interface 1c that enables attachment and detachment of the personal computer 5 capable of inputting and outputting the measured water consumption. In addition, the wireless processing unit 1e that enables wireless communication via the antenna 1g, and the amount of water used calculated based on the input pulse are stored as an integrated value, and the current voltage that is the battery life of the slave station 1 The memory | storage part 1f which memorize | stores. Also, the current input unit 1a, the pulse input unit 1b, the external interface 1c, the wireless processing unit 1e, and the storage unit 1f are connected to each other, and the amount of water used is integrated based on the pulses input from the pulse input unit 1b. There is provided a control unit 1d that executes processing for calculating a value, processing for storing the integrated value in the storage unit 1f, processing for wirelessly communicating the integrated value stored in the storage unit 1f from the wireless processing unit 1e, and the like.

  The slave station 2 also includes a current input unit 2a, a pulse input unit 2b, an external interface 2c, a wireless processing unit 2e having an antenna 2g, a storage unit 2f, and a control unit 2d, similar to the slave station 1. In the slave station 2, the current input unit 2 a is connected to the measurement target power line 21. In addition, based on the electric current input from the current input part 2a, power consumption is calculated by the control part 2d, and this power consumption is memorize | stored in the memory | storage part 2f as a state quantity.

  The relay station 3 also serves as a slave station. The relay station 3 has a current input unit 3a, a pulse input unit 3b, an external interface 3c, and a radio processing unit 3e having an antenna 3g similar to the slave stations 1 and 2. A storage unit 3f and a control unit 3d are provided. In the relay station 3, the pulse input unit 3b is connected to a meter 22 with pulse transmission for measuring the amount of gas used.

  The master station 4 that performs wireless communication with the slave station 1, with the slave station 2 via the relay station 3, or with the relay station 3, respectively, includes a radio processing unit 4 a having an antenna 4 g. And an external interface 4b in which the personal computer 5 can be attached and detached, a communication interface 4d that enables communication with the outside of the building 6, and state quantities transmitted from each of the slave stations 1, 2 and the relay station 3 Is stored for each station and for each identical state quantity. In addition, the wireless processing unit 4a, the external interface 4b, the communication interface 4d, and the storage unit 4e are connected to each other, and the integrated value is calculated and stored by wireless communication via the slave stations 1 and 2 and the relay station 3. And the control part 4c which performs a communication process with the exterior of the building 6 is provided. In addition, the control part 4c is the presence / absence of reception from the slave stations 1 and 2 and the relay station 3, for example, each of the state quantities individually measured from the slave stations 1, 2 and the relay station 3 continuously six times. First determination means for determining whether or not the transmission has been performed, and second determination means for determining whether or not at least one of the slave stations 1 and 2 and the relay station 3 has reached the required life. . The control unit 4c is arranged outside the building 6 when the first determination unit determines that there is no reception, or when the second determination unit determines that the battery has reached a life that requires replacement. In addition, there is also provided a reporting means for reporting abnormality to the dispatch base 9 of maintenance personnel who perform maintenance and inspection work of the master station 4, the slave stations 1 and 2, and the relay station 3.

  The communication interface 4d of the master station 4 includes an energy management center 8 installed at a location away from the building 6 via the general telephone line 7, the slave stations 1 and 2, the relay station 3 of the building 6, and the master station. 4 is connected to the above-mentioned dispatch base 9 where maintenance personnel who perform the maintenance inspection work wait.

  The energy management center 8 includes a communication interface 8a connected to the general telephone line 7 and an integrated value of all state quantities of the building 6 transmitted via the master station 4, that is, power consumption calculated from current consumption, A storage unit 8c that stores integrated values such as the amount of water used and the amount of gas used, and all the state quantities of the building 6 that are connected to the communication interface 8a and the storage unit 8c and are input via the communication interface 8a. And a control unit 8b that executes processing for storing the respective integrated values in the storage unit 8c.

  FIG. 2 is a diagram illustrating an example of an arrangement form of a master station, a slave station, and a relay station provided in the present embodiment in a building.

  The building 6 described above has a plurality of floors, for example, the third floor, and the master station 4 and the slave stations 16 and 17 corresponding to the slave station 1 described above are installed on the first floor. On the second floor, slave stations 13 and 14 corresponding to the slave station 2 described above and a relay station 15 corresponding to the relay station 3 described above are installed. On the third floor, a slave station 10 corresponding to the slave station 2 and relay stations 11 and 12 corresponding to the relay station 3 are installed.

  For convenience, a radio number installed in the building 6 is given a machine number. The master station on the first floor is set to Unit 0. The slave station 10 on the third floor is set to Unit 1, the relay station 11 is set to Unit 2, and the relay station 12 is set to Unit 3. The slave station 13 on the second floor is set to No. 4, the slave station 14 is set to No. 5, and the relay station 15 is set to No. 6. The slave station 16 on the first floor is set to Unit 7, and the slave station 17 is set to Unit 8.

  For example, each of the slave stations 16 and 17 on the first floor is arranged so as to perform wireless communication directly with the master station 4. The slave stations 13 and 14 on the second floor are arranged so as to perform wireless communication with the master station 4 via the relay station 15. The relay station 11 on the third floor is arranged so as to perform wireless communication with both the slave station 10 and the relay station 12, and the relay station 12 is arranged so as to perform wireless communication with the master station 4.

  FIG. 3 is a diagram illustrating an example of a communication format provided in the present embodiment.

  As shown in FIG. 3, the communication format of the master station 4, the slave stations 10, 13, 14, 16, 17 and the relay stations 11, 12, 15 arranged in the building 6 is, for example, the same communication format 30. It is set. The communication format 30 includes a communication information storage unit 30a, a self machine number storage unit 30b, a battery information storage unit 30c, a time information storage unit 30d, an integrated value machine number storage unit 30e, and first to sixth integrated value information areas 30f1. ~ 30f6 are included.

  For example, in the communication format 30 of the master station 4, a time correction command for other stations is stored in the communication information storage unit 30a. The own machine number storage section 30b stores the number of the own machine, that is, “No. 0 machine”. There is nothing stored in the battery information storage unit 30c. The time information storage unit 30d stores the current time recognized by the master station 4. Since the integrated value number storage unit 30e and the first to sixth integrated value information areas f1 to 30f6 are storage units related to the measurement of the state quantity, nothing is stored in the communication format 30 of the master station 4.

  Further, for example, in each communication format 30 of the slave stations 10, 13, 14, 16, and 17, the integrated value of the state quantity measured by the communication information storage unit 30a for the corresponding relay station or the parent station A notification for the station 4 is stored. The own machine number storage unit 30b stores the number of the own machine, that is, the corresponding “No. 1”, “No. 4”, “No. 5”, “No. 7”, and “No. 8”. The battery information storage unit 30c stores its current battery voltage. In addition to the current time recognized by itself, the time information storage unit 30d stores time information that takes into account a communication time interval described later with respect to the current time of the master station 4 or the current time of the relay station. Also in the integrated value number storage 30e, the number of the above-mentioned own number, that is, the corresponding “No. 1,” “No. 4,” “No. 5,” “No. 7,” “No. 8,” is stored. In the first to sixth integrated value information areas 30f1 to 30f6, the integrated value of the state quantity measured by itself is stored. An integrated value within a state quantity acquisition time, which will be described later, at a time closest to the current time is stored in the first integrated value information area 30f1, and an integrated value within the previous state quantity acquisition time is stored in the second integrated value information area 30f2. And the integrated value within the previous time of obtaining the state quantity is stored in the third integrated value information area 30f3. Similarly, the previous integrated value is stored in the fourth to sixth integrated value information areas 30f4 to 30f6.

  For example, in the communication format 30 of each of the relay stations 11, 12, and 15, the communication information storage unit 30a considers the current time of the relay station corresponding to the slave station and a communication time interval described later. Stored is a notification for causing the relevant relay station to give the integrated value of the state quantity measured by the relevant slave station, and a notification of the integrated value of the state quantity measured by itself to the master station 4 Is done. The own machine number storage unit 30b stores the number of the own machine, that is, the corresponding "No. 2," "No. 3," and "No. 6". The battery information storage unit 30c stores its current battery voltage. In addition to the current time recognized by itself, the time information storage unit 30d stores time information that takes into account a communication time interval described later with respect to the current time of the master station 4 or the current time of the relay station. In the integrated value number storage unit 30e, the number of the slave station relaying or the number of the relay station number is stored. The first to sixth integrated value information areas 30f1 to 30f6 store the integrated value of the state quantity measured by itself and the integrated value of the state quantity measured by the relay station or the relay station.

  In the communication system according to the present embodiment, in particular, the time of wireless communication performed between the master station 4, the slave stations 10, 13, 14, 16, 17 and the relay stations 11, 12, 15 is different from each other. A reference time that prescribes a communication time interval between the master station 4, the slave stations 10, 13, 14, 16, and 17 and the relay stations 11, 12, and 15 is set in advance so as to be the time, Communication between the slave stations 10, 13, 14, 16, and 17 and the relay stations 11, 12, and 15 is performed every reference time. In addition, when each of the plurality of state quantities measured at each of the slave stations 10, 13, 14, 16, 17 and the relay stations 11, 12, 15 is measured, A state quantity acquisition time is set in advance, which is a time during which acquisition is possible for all. In addition, one or a plurality of communications performed from the transmission source to the transmission destination at the same time among the master station 4, the slave stations 10, 13, 14, 16, 17 and the relay stations 11, 12, 15 are performed 1 times. For example, the reference time and the state quantity acquisition time are set so that the accumulated time of the reference time corresponding to the total number of times of communication is sufficiently shorter than the above-described state quantity acquisition time for each time, for example. The relationship is set. For example, considering the actual state of wireless communication in the building 6, the reference time for defining the communication time interval is set to 10 seconds, and the communication time interval is set to 10 N seconds (N = 1, 2, 3,...). The state quantity acquisition time for each time is set to 10 minutes.

  FIG. 4 is a diagram illustrating an example of a transmission sequence in the present embodiment.

  In the present embodiment, transmission between the master station 4 and the slave stations 10, 13, 14, 16, 17 and the relay stations 11, 12, 15 is performed within each communication time within 10 minutes for each state quantity acquisition time. For example, as shown in FIG. 4, the operation is sequentially performed in accordance with the interval of 10 N seconds (N = 1, 2, 3,...). In FIG. 4, a white circle indicates a transmission source, and a black circle indicates a transmission destination.

  First, time-sharing NO. As indicated by 0, transmission is performed from the master station 4 to the relay stations 12 and 15 and the slave stations 16 and 17. In response to the transmission from the master station 4, the relay station 12 corrects the current time of the relay station 12 to match the current time recognized by the master station 4, and the transmission time from the relay station 12. To the transmission time of the master station 4 plus the communication time interval (10 × 1 =) 10 seconds, (10 × 3 =) 30 seconds, and (10 × 6 =) 60 seconds Set each time. The relay station 15 corrects the current time of the relay station 15 to match the current time of the parent station 4, and sets the transmission time from the relay station 15 to the transmission time of the parent station 4 (10 × 7 =) The time when 70 seconds are added, the time when (10 × 9 =) 90 seconds are added, and the time when (10 × 11 =) 110 seconds are added.

  The slave station 16 corrects the current time of the slave station 16 so that it matches the current time of the master station 4, and sets the transmission time from the slave station 16 to the transmission time of the master station 4 (10 × 12). =) Set the time after adding 120 seconds. The slave station 17 corrects the current time of the slave station 17 to match the current time of the master station 4, and sets the transmission time from the slave station 17 to the transmission time of the master station 4 (10 × 13 =) Set the time after adding 130 seconds.

  Next, time division NO. As shown in FIG. 1, 10 seconds after transmission from the master station 4 to the relay stations 12 and 15 and the slave stations 16 and 17, transmission is performed from the relay station 12 to the relay station 11 and the master station 4. In response to the transmission from the relay station 12, the relay station 11 corrects the current time of the relay station 11 to match the current time of the relay station 12, and the transmission time from the relay station 11 is changed to the relay time. The transmission time from the station 12 is set to a time obtained by adding a communication time interval (10 × 1 =) 10 seconds, and a time obtained by adding (10 × 4 =) 40 seconds. The master station 4 receives the stored items of the communication format 30 of the relay station 12, that is, the integrated value of the state quantity measured by the relay station 12, the current battery voltage of the relay station 12, and the like.

  Next, time division NO. 2, 10 seconds after transmission from the relay station 12 to the relay station 11 and the master station 4, the relay station 11 transmits to the relay station 12 and the slave station 10. In response to the transmission from the relay station 11, the relay station 12 stores the integrated value of the state quantity measured by the relay station 11, the current battery voltage of the relay station 11, and the like. Further, according to the transmission from the relay station 11, the slave station 10 corrects the current time of the slave station 10 to match the current time of the relay station 11, and the transmission time from the slave station 10 is relayed. It is set to a time obtained by adding a communication time interval (10 × 2 =) 20 seconds to the transmission time from the station 11.

  Next, time division NO. 3, 10 seconds after transmission from the relay station 11 to the relay station 12 and the slave station 10, the integrated value of the state quantities measured by the relay station 11 from the relay station 12 to the master station 4, and the relay station 11 current battery voltages and the like are transmitted.

  Next, time division NO. 4, 10 seconds after transmission from the relay station 12 to the master station 4, the integrated value of the state quantity measured by the slave station 10 from the slave station 10 to the relay station 11, and the battery voltage of the slave station 10 Etc. are transmitted.

  Next, time division NO. As shown in FIG. 5, 10 seconds after transmission from the slave station 10 to the relay station 11, the relay station 11 sends to the relay station 12 the accumulated value of the state quantity measured by the slave station 10 and the current value of the slave station 10. Battery voltage etc. are transmitted.

  Next, time division NO. 6, 10 seconds after transmission from the relay station 11 to the relay station 12, the relay station 12 sends to the master station 4 the accumulated value of the state quantity measured by the slave station 10 and the current value of the slave station 10. Battery voltage etc. are transmitted.

  Next, time division NO. As shown by 7, 10 seconds after transmission from the relay station 12 to the master station 4, transmission is performed from the relay station 15 to the slave stations 13, 14 and the master station 4. In response to the transmission from the relay station 15, the slave station 14 corrects the current time of the slave station 14 to match the current time of the relay station 15, and sets the transmission time from the slave station 14 to the relay station. 15 is set to a time obtained by adding a communication time interval (10 × 3 =) 30 seconds to the transmission time from 15. Further, the slave station 13 corrects the current time of the slave station 13 to match the current time of the relay station 15, and sets the transmission time from the slave station 13 to the transmission time from the relay station 15 at the communication time interval. (10 × 1 =) Set to the time after adding 10 seconds. The master station 4 receives the state quantity measured by the relay station 15, the current battery voltage of the relay station 15, and the like.

  Next, time division NO. 8, 10 seconds after transmission from the relay station 15 to the slave stations 13 and 14 and the master station 4, the integrated value of the state quantities measured by the slave station 13 from the slave station 13 to the relay station 15, And the current battery voltage of the slave station 13 is transmitted.

  Next, time division NO. 9, 10 seconds after transmission from the slave station 13 to the relay station 15, the relay station 15 sends to the master station 4 an accumulated value of the state quantity measured by the slave station 13, and the current status of the slave station 13. Battery voltage etc. are transmitted.

  Next, time division NO. As shown by 10, 10 seconds after transmission from the relay station 15 to the master station 4, the integrated value of the state quantity measured by the slave station 14 from the slave station 14 to the relay station 15, and the current status of the slave station 14 Battery voltage etc. are transmitted.

  Next, time division NO. 11, 10 seconds after transmission from the slave station 14 to the relay station 15, the relay station 15 sends to the master station 4 the accumulated value of the state quantity measured by the slave station 14 and the current status of the slave station 14. Battery voltage etc. are transmitted.

  Next, time division NO. 12, 10 seconds after transmission from the relay station 15 to the master station 4 is performed, the integrated value of the state quantity measured by the slave station 16 from the slave station 16 to the master station 4 and the current value of the slave station 16 Battery voltage etc. are transmitted.

  Next, time division NO. As shown by 13, 10 seconds after transmission from the slave station 16 to the master station 4, the integrated value of the state quantity measured by the slave station 17 from the slave station 17 to the master station 4, and the current status of the slave station 17 Battery voltage etc. are transmitted.

  In this way, the time-division NO. As shown in 0 to 13, every 10 seconds of the reference time, the wireless communication between the master station 4, the slave stations 10, 13, 14, 16, 17 and the relay stations 11, 12, 15 is performed. It is carried out without overlapping. In addition, although the measurement of the state quantity in the building 6 is continuously performed without interruption, the state quantity from the slave stations 10, 13, 14, 16, 17 and the relay stations 11, 12, 15 in the master station 4 The integrated value is repeatedly acquired every 10 minutes of the state quantity acquisition time. Then, the integrated value of the latest six state quantities, the current battery voltage, and the like are stored in the respective communication formats of the slave stations 10, 13, 14, 16, 17 and the relay stations 11, 12, 15.

  FIG. 5 is a flowchart showing a processing procedure in the control unit or the like of the master station in this embodiment.

  In the control unit 4c of the master station 4 shown in FIG. 1, the state quantities measured by the slave stations 10, 13, 14, 16, 17 and the relay stations 11, 12, 15 shown in FIG. The integrated value, the current battery voltage, and the like are input (procedure S1).

  Therefore, for example, the control unit 4c obtains an integrated value for each state quantity of the same type and performs a process of storing it in the storage unit 4e (step S2).

  In addition, the control unit 4c, for each of the slave stations 10, 13, 14, 16, 17 and the relay stations 11, 12, 15 and the integrated values of the latest 6 state quantities measured by each station itself, A process of storing the current battery voltage of each corresponding station itself in the storage unit 4e is performed (step S3).

  Next, in the first determination means of the control unit 4c, it is determined whether or not the reception is continuously performed 6 times for each of the slave stations 10, 13, 14, 16, 17 and the relay stations 11, 12, 15. (Procedure S4). If it is determined by the first determination means of the control unit 4c that reception has been continued six times, normal wireless communication is being performed, and the process proceeds to step S5. If it is determined by the first determination means that no reception has been made for six consecutive times, a communication failure has occurred and the process proceeds to step S6.

  In step S5, the second determination means of the control unit 4c determines whether the battery has run out for each of the slave stations 10, 13, 14, 16, 17, and the relay stations 11, 12, 15. In this determination, for example, it is determined that the battery has run out when the battery voltage of each station is 30% or less of the rated voltage. When it is determined by the second determination means that the battery has not run out, the battery state of the corresponding station is maintained at a battery state that enables normal communication, and the process returns to step S1. Then, the same processing as described above is continued. Further, when the second determination means determines that there is a battery that has run out of battery, there is a possibility that normal wireless communication may not be performed in the corresponding station, that is, there is a possibility of communication abnormality, and the process proceeds to step S6. .

  Here, between the master station 4 and each of the slave stations 10, 13, 14, 16, and 17 and the relay stations 11, 12, and 15, as determined by the first determination means and the second determination means of the control unit 4 c. When it is determined that normal communication is being performed, for example, the integrated values of the same type of state quantity stored in the storage unit 4e of the master station 4 are converted into the control unit of the master station 4 shown in FIG. By the processing of 4c, the data is transmitted to the energy management center 8 through the communication interface 4d of the master station 4 and the general telephone line 7. The integrated values of these state quantities are input to the control unit 8b via the communication interface 8a of the energy management center 8, and are stored in the storage unit 8c by the control process of the control unit 8b.

  If it is determined by the determination by the first determination means in step S4 shown in FIG. 5 or the determination by the second determination means in step S5 that a communication failure or communication abnormality has occurred, as described above, step S6 is performed. However, in this step S6, an abnormality report is transmitted from the reporting means of the control unit 4c of the master station 4 to the dispatch base 9 via the communication interface 4d and the general telephone line 7.

  The dispatching base 9 which has received this abnormality report immediately dispatches maintenance personnel to the corresponding building 6 shown in FIG. In the following, for ease of explanation, the slave station and the relay station will be described using the reference numerals shown in FIG.

  If the communication abnormality is a communication failure due to a determination that the first determination means of the control unit 4c has not been received six times in succession, the dispatched maintenance staff will be assigned to the corresponding slave station 1, 2 or relay station 3. The portable personal computer 5 is connected to one of the external interfaces 1c, 2c, and 3c. Therefore, a process of storing the integrated value of the state quantity stored in any of the storage units 1f, 2f, 3f of the corresponding slave station 1 or 2 or the relay station 3 in the storage unit of the personal computer 5 is performed. In addition, the personal computer 5 storing the integrated values of the state quantities of the corresponding slave stations 1 and 2 or the relay station 3 is connected to the external interface 4b of the master station 4 and the corresponding stored in the personal computer 5 is stored. The integrated value of the state quantities of the slave stations 1 and 2 or the relay station 3 to be stored is stored in the storage unit 4e through the control process of the control unit 4c of the master station 4. Further, the control unit 4c of the master station 4 performs an operation for correcting the same type of integrated value based on the input integrated value of the state quantity of the corresponding slave station 1, 2 or the relay station 3, and the correction is made. The integrated value of the state quantity is stored in the storage unit 4e, and for example, the corrected integrated value of the state quantity is transmitted to the energy management center 8 via the general telephone line 7.

  In addition, when the communication abnormality is a communication abnormality due to the determination that the battery is dead in the second determination unit of the control unit 4c, the dispatched maintenance staff is either the corresponding slave station 1, 2 or the relay station 3. Work to replace the battery promptly.

  According to the present embodiment configured as described above, the state quantities such as the power consumption, the amount of water used, and the amount of gas used based on the current consumption in the building 6 shown in FIG. The relay station 3 measures the integrated values of the state quantities directly from the slave station 1 to the master station 4, or from the slave station 2 to the master station 4 via the relay station 3, or as a slave station. Wireless communication is performed from the station 3 to the master station 4. Therefore, the master station 4 can grasp the integrated value of all the state quantities measured in the same building 6.

  Further, a reference time 10 that defines a communication time interval (10 × N seconds: N = 1, 2, 3...) Between the master station 4, the slave stations 1 and 2, and the relay station 3 arranged in the building 6. Seconds are set in advance, and communication between the master station 4, the slave stations 1 and 2, and the relay station 3 is performed every reference time of 10 seconds. In the communication between the stations 3, the communication times can be made different from each other. That is, normal communication can be realized without causing communication abnormality such as interference. Therefore, without providing a special station such as a response monitoring station for monitoring communication abnormality in addition to the master station 4, the slave stations 1 and 2, and the relay station 3, the master station 4, the slave stations 1 and 1 arranged in the building 6 are provided. 2. Normal wireless communication between the relay stations 3 can be realized. This simplifies the installation work of installing a radio device including the master station 4, the slave stations 1 and 2, and the relay station 3 in one building 6. Accordingly, it is possible to improve the efficiency of the maintenance and inspection work of the radio equipment including the master station 4, the slave stations 1 and 2, and the relay station 3 arranged in the same building 6. Furthermore, the production cost of the radio communication system including the master station 4, the slave stations 1 and 2, and the relay station 3 arranged in the same building 6 can be reduced.

  In addition, in the present embodiment, a state quantity acquisition time of 10 minutes, which is a time that enables measurement of all of the plurality of state quantities, is set in advance at the time of each measurement for all of the plurality of state quantities. Corresponds to the total number of communications when one or more communications made from the transmission source to the transmission destination are counted as one communication at the same time among the master station 4, the slave stations 1, 2 and the relay station 3. The relationship between the reference time and the state quantity acquisition time is set so that the accumulated time of the reference time of 10 seconds is sufficiently shorter than the state quantity acquisition time for each time. As a result, when a new slave station or relay station that measures the state quantity is to be installed in the building 6, the number of slave stations or relay stations to be additionally installed is obtained as the state quantity. If the time is limited to a number corresponding to the time difference between 10 minutes and the cumulative time of the reference time of 10 seconds corresponding to the number of communications between the master station 4, the slave stations 1, 2 and the relay station 3, Without changing the set reference time of 10 seconds and state quantity acquisition time of 10 minutes, the master station 4 can easily grasp the integrated values of all the state quantities measured in the same building 6. That is, the integrated value of all the state quantities in the building 6 can be obtained in the master station 4 without requiring a significant system change. Thereby, the cost required for adding a slave station or a relay station can be minimized.

  In the present embodiment, the master station 4, the slave stations 1 and 2, and the relay station 3 are arranged in the building 6 having the third floor, but the floor of the building 6 is limited to the third floor. There is nothing. In addition, various numbers of the slave stations 1 and 2 and the relay station 3 can be selected according to the state quantity to be measured.

  In this embodiment, the reference time that defines the communication time interval is set to 10 seconds, but the reference time is not limited to 10 seconds. Various reference times can be selected. Similarly, in this embodiment, the state quantity acquisition time is set to 10 minutes, but the state quantity acquisition time is not limited to 10 minutes. Various state quantity acquisition times can be selected within a range that is longer than the cumulative time of the reference time corresponding to the number of communications between the master station 4, the slave stations 1 and 2, and the relay station 3.

1 slave station 2 slave station 3 relay station 4 master station 5 personal computer 7 general telephone line 8 energy management center 9 dispatch base 10 slave station (unit 1)
11 Relay station (Unit 2)
12 Relay station (Unit 3)
13 Slave station (Unit 4)
14 Slave station (Unit 5)
15 Relay station (Unit 6)
16 Slave station (Unit 7)
17 Slave station (Unit 8)
20 Meter with pulse transmission 21 Wire to be measured 22 Meter with pulse transmission 30 Communication format

Claims (5)

A relay station that relays between the master station and the slave station, and the master station and the slave station, each including a wireless device, enables wireless communication between the master station, the slave station, and the relay station In a wireless communication system,
Each of the master station, the slave station, and the relay station is installed in the same building,
The slave station and the relay station are composed of wireless sensors that individually measure a plurality of state quantities in the building,
When performing wireless communication between the master station, the slave station, and the relay station, the times of communication performed between the master station, the slave station, and the relay station are different from each other. A reference time that defines a communication time interval between the master station, the slave station, and the relay station is set in advance, and communication between the master station, the slave station, and the relay station is performed at each reference time. As well as
At the time of each measurement for all of the plurality of state quantities, a state quantity acquisition time that is a time that enables acquisition of all of the plurality of state quantities is set in advance,
The reference corresponding to the total number of communications when one or more communications made from the source to the destination at the same time among the master station, the slave station, and the relay station are counted as one communications A wireless communication system, wherein a relationship between the reference time and the state quantity acquisition time is set so that an accumulated time is shorter than the state quantity acquisition time for each time. The wireless communication system according to claim 1, wherein
The building has a plurality of floors, and the master station is installed on one of the plurality of floors. The wireless communication system according to claim 1, wherein
The master station stores the current time recognized by the master station in a communication format,
The slave station stores the state quantity measured by the slave station in the communication format,
The wireless communication system, wherein the relay station stores a time obtained by adding the communication time interval from a current time recognized by the master station to a communication format, and a state quantity measured by the relay station. The wireless communication system according to claim 3,
The slave station, and at least the slave station of the relay station is operated by a battery,
A wireless communication system, wherein the current battery voltage is stored in each of the communication format of the slave station and the communication format of the relay station. The wireless communication system according to claim 4, wherein
The master station is
First determination means for determining presence / absence of reception from the slave station and the relay station, and second determination for determining whether or not at least one of the batteries of the slave station and the relay station has reached the required life Means,
When the first determination unit determines that there is no reception, or when the second determination unit determines that the battery has reached a life that requires replacement, the master station is disposed outside the building. A radio communication system comprising a reporting unit for reporting an abnormality at a slave station and a dispatching base of maintenance personnel who perform maintenance and inspection work of the relay station.

Images