Information processing system

Abstract

To prevent the occurrence of an unlimited blank period while reducing the amount of data transmission.SOLUTION: A pressure sensor 1a detects the operating pressure of a jack 2. A data extraction unit 1b extracts, among pieces of data periodically acquired by the pressure sensor 1a, data that changes beyond a predetermined criterion with respect to previously transmitted data, and data when a specified time has passed since the previous transmission. A wireless transmission unit 1c wirelessly transmits the data extracted by the data extraction unit 1b to an external system 3 that stores the data.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a data transmission device that transmits the operating pressure of a jack as data, and an information providing device that cooperates with the same. An information processing system including It relates to.

Background Art

[0002] For example, Patent Document 1 discloses a system that has a strain sensor and a temperature sensor and remotely monitors the strain amount and temperature of structures such as buildings, bridges, and tunnels. In this system, first, data related to the strain amount and temperature is periodically acquired by the strain sensor and the temperature sensor. Next, it is determined whether there is a predetermined deviation compared to the distribution of the change region of the strain amount, which is one of the correlation relationships between the past strain amount and temperature, for the acquired data. And when it is determined that there is a predetermined deviation, at least one of this correlation relationship or information indicating an abnormal state is extracted and wirelessly transmitted to the outside. In this way, by transmitting only the data with a predetermined deviation among the periodically acquired data, even if the communication capacity of the wireless line is low or in a place where it is difficult to secure power supply, the data necessary for grasping the situation of the structure can be effectively transmitted.

[0003] Also, Patent Document 2 discloses a data transmission device that has a temperature sensor and a humidity sensor and transmits the indoor temperature and humidity of buildings, factories, agricultural greenhouses, etc. In this device, first, data related to the temperature and humidity is periodically acquired by the temperature sensor and the humidity sensor. Next, it is determined based on whether this data is the same as the data transmitted last time or different only within a predetermined range for the acquired data. And when it is determined that they are the same or different only within a predetermined range, the transmission of the data is suspended. In this way, by suspending the transmission of the data that is substantially the same as the previous data among the periodically acquired data, the power consumption for data transmission can be reduced.

Prior Art Documents

Patent Documents

[0004] [Patent Document 1] Japanese Patent No. 6495509 [Patent Document 2] Japanese Unexamined Patent Application Publication No. 10-224239 [Summary of the Invention] [Problems to be Solved by the Invention]

[0005] However, in Patent Documents 1 and 2, while the data transmission volume can be effectively reduced, there is a drawback that, depending on the situation, a blank period during which no data is transmitted may continue indefinitely. That is, in Patent Document 1, as long as data without a predetermined deviation continues, the blank period continues indefinitely. The same applies to Patent Document 2; as long as data that is substantially the same as the previous time continues, the blank period continues indefinitely. If the blank period continues indefinitely, for the data receiving side, it is impossible to determine whether this blank period is a normal operation resulting from an agreement on data transmission, or an abnormal operation resulting from some failure or malfunction on the data transmission side.

[0006] Therefore, an object of the present invention is to prevent the occurrence of an unlimited blank period while reducing the data transmission volume. [Means for Solving the Problems]

[0007] To solve such problems, a first invention provides a data transmission device that transmits data as the operating pressure data of a jack. This transmission device includes a pressure sensor, a data extraction unit, and a wireless transmission unit. The pressure sensor detects the operating pressure of the jack. The data extraction unit extracts, from the data periodically acquired by the pressure sensor, data that changes beyond a predetermined reference with respect to the previously transmitted data, and data at the time when a predetermined time has elapsed since the previous transmission. The wireless transmission unit wirelessly transmits the data extracted by the data extraction unit to an external system that accumulates this data.

[0008] Here, in the first invention, it is preferable that the predetermined time is n times (n is an integer of 2 or more) the acquisition period of data in the pressure sensor. Further, it is preferable that the data extraction unit unconditionally extracts the data first acquired by the pressure sensor as the data to be transmitted to the external system. Further, a battery for supplying power to the circuit in the data transmission device may be further provided.

[0009] The second invention provides an information providing device in cooperation with the data transmission device according to the first invention. This information providing device includes a data receiving unit, a storage unit, and a screen generating unit. The data receiving unit receives data regarding the operating pressure of the jacks from a plurality of data generating devices associated with each of the plurality of jacks arranged on the structure. The storage unit stores the data received by the data receiving unit. The screen generating unit generates a display screen that displays the operating pressure of the jacks in a positional relationship associated with the arrangement location of the jacks based on the data read from the storage unit.

Effect of the Invention

[0010] According to the present invention, among the data periodically acquired by the pressure sensor, basically, only the data that changes beyond a predetermined reference with respect to the data transmitted last time is transmitted. Thereby, the amount of data transmitted can be effectively reduced without missing important data. In addition to this, the data at the time when a predetermined time has elapsed since the last transmission is also transmitted. Thereby, the blank period during which data is not transmitted is limited to this predetermined time at most, so that the occurrence of an unlimited blank period can be effectively prevented.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Mode for Carrying Out the Invention

[0012] FIG. 1 is a block configuration diagram of a data transmission device according to this embodiment. This data transmission device 1 is attached to a jack 2 such as a flat jack, and has a function of measuring the operating pressure of the jack 2 and a function of cooperating the measurement result with a cloud (external system 3).

[0013] The data transmission device 1 mainly includes a pressure sensor 1a, a data extraction unit 1b, and a wireless transmission unit 1c. The pressure sensor 1a detects the operating pressure of the jack 2. The data extraction unit 1b thins out the data periodically acquired by the pressure sensor 1a and selectively extracts the data to be transmitted. The wireless transmission unit 1c wirelessly transmits the data selectively extracted by the data extraction unit 1b to the external system 3. Note that the power for driving the circuits in the data transmission device 1 including the data extraction unit 1b and the wireless transmission unit 1c is supplied by a battery 1d built in the data transmission device 1.

[0014] FIG. 2 is a block configuration diagram of an external system 3 (information providing device). The external system 3 accumulates the data received from a plurality of data transmission devices 1, and, if necessary, processes the accumulated information into the form of a web page and presents it as a browsable screen to a client 4 on the user side.

[0015] This external system 3 mainly consists of a data receiving unit 3a, a storage unit 3b, and a screen generating unit 3c. The data receiving unit 3a receives data regarding the operating pressure of the jack 2 from a plurality of data transmitting devices 1 at any time. This data reception may be performed directly from the data transmitting device 1 or indirectly via a relay device such as a wireless master unit. Here, a plurality of jacks 2 are arranged at different positions on structures such as bridges to be monitored, and corresponding to each jack 2, a data transmitting device 1 for detecting and transmitting its operating pressure is provided. The data received by the data receiving unit 3a is stored in the storage unit 3b at any time. The screen generating unit 3c generates a Web page based on the data read from the storage unit 3b and transmits it to the client 4. As a result, on the client 4, the Web page is displayed in a form that can be browsed by the user.

[0016] Figure 3 is a diagram showing an example of a Web page presenting information collected and stored from a plurality of data transmitting devices 1. In the example of this figure, 8×3 jacks 2 are installed for a structure such as a bridge, and the operating pressure (hydraulic pressure) of these jacks 2 and the load calculated from the pressure receiving area are visually associated with each other in a positional relationship. As shown in this figure, the operating pressure of the jack 2 is displayed in a form that maintains the positional relationship associated with the installation location of this jack 2, that is, in a form where 8×3 information display cells are arranged in a matrix.

[0017] Figure 4 is a timing chart of data transmission. In the example of this figure, the horizontal axis represents the data acquisition cycle at the pressure sensor 1a, showing cycles up to the 33rd. The vertical axis represents the pressure (load) in each cycle.

[0018] In this embodiment, not all of the data periodically acquired by the pressure sensor 1a is transmitted, but only the data selectively extracted by the data extraction unit 1b is transmitted. There are three types of data extracted by the data extraction unit 1b: first data, second data, and third data.

[0019] The first data is the data of the first cycle first acquired by the pressure sensor 1a when the power is turned on or the like. The first data is unconditionally extracted as the data to be transmitted to the external system 3.

[0020] The second data is data with a large pressure change amount exceeding a predetermined standard with respect to the previously transmitted data, and is characteristic that cannot be overlooked in monitoring the pressure. Data not corresponding to the second data, that is, data with a small pressure change amount, is excluded from the transmitted data unless it corresponds to the third data described later. As a criterion for determining the magnitude of the change amount, for example, a threshold value of the change rate with respect to the previously transmitted data can be used. If it is equal to or greater than the threshold value, the change amount is determined to be large, and if it is less than the threshold value, the change amount is determined to be small. Also, instead of the threshold value of the change rate, a threshold value of the change amount itself with respect to the previously transmitted data may be used.

[0021] The third data is the data at the time when a predetermined time has elapsed since the previous transmission, and is extracted regardless of the magnitude of the change amount. This predetermined time is set, for example, as n times (n is an integer of 2 or more) the acquisition period of the data in the pressure sensor 1a, and the presence or absence of reaching the predetermined time is determined by counting the acquisition period by a counter provided in the data extraction unit 1b. In the present embodiment, as an example, the data acquisition period is set to 1 second and n = 10, that is, 10 seconds is the above-mentioned predetermined time. It should be noted that since the value of the counter is reset every time data is transmitted, the transmission of the third data is not necessarily repeated at 10-second intervals.

[0022] First, in the first cycle (the first data acquisition cycle), the data acquired in this cycle is forcibly extracted as the first data and sent to the external system 3. At the same time, a time count starting from the first cycle is initiated. In the subsequent second to sixth cycles, the amount of change in pressure is small and the time count has not reached 10 yet. Therefore, no transmission to the external system 3 is performed, and the time count starting from the first cycle continues.

[0023] When the seventh cycle is reached, since the amount of change in pressure with respect to the previously transmitted data (the first data in the first cycle) is large, the data acquired in this cycle is extracted as the second data and sent to the external system 3. At the same time, the time count is reset and a new time count is initiated. In the subsequent eighth to sixteenth cycles, the amount of change in pressure is small and the time count has not reached 10 yet. Therefore, no transmission to the external system 3 is performed, and the time count starting from the seventh cycle continues.

[0024] When the seventeenth cycle is reached, since the time count has reached 10, regardless of the magnitude of the change in pressure, the data acquired in this cycle is extracted as the third data and sent to the external system 3. At the same time, the time count is reset and a new count is initiated. In the subsequent eighteenth to nineteenth cycles, the amount of change in pressure is small and the time count has not reached 10 yet. Therefore, no data transmission to the external system 3 is performed, and the time count starting from the seventeenth cycle continues.

[0025] When reaching the 20th cycle, since the amount of change in pressure with respect to the data transmitted last time (the third data in the 17th cycle) is large, the data acquired in this cycle is extracted as the second data and transmitted to the external system 3. At the same time, the time count is reset and a new time count is started. In the subsequent 21st to 26th cycles, the amount of change in pressure is small and the time count has not reached 10. Therefore, transmission to the external system 3 is not performed, and the time count starting from the 20th cycle continues.

[0026] When reaching the 27th cycle, since the amount of change in pressure with respect to the data transmitted last time (the second data in the 20th cycle) is large, the data acquired in this cycle is extracted as the second data and transmitted to the external system 3. At the same time, the time count is reset and a new count is started. In the subsequent 28th cycle, the amount of change in pressure is small and the time count has not reached 10. Therefore, transmission to the external system 3 is not performed, and the time count starting from the 27th cycle continues.

[0027] When reaching the 29th cycle, since the amount of change in pressure with respect to the data transmitted last time (the second data in the 27th cycle) is large, the data acquired in this cycle is extracted as the second data and transmitted to the external system 3. At the same time, the time count is reset and a new count is started. After this, since the amount of change in pressure is small and the time count has not reached 10, data transmission to the external system 3 is not performed, and the time count starting from the 29th cycle continues.

[0028] In the above temporal transition, the data transmission device 1 does not transmit all the data for 33 cycles, but randomly extracts only the data for 6 cycles and transmits it to the external system 3. As a result, the amount of data transmission is compressed to 6 / 33 as a whole.

[0029] Thus, according to this embodiment, among the data periodically acquired by the pressure sensor 1a, basically, only the second data that changes beyond a predetermined reference with respect to the previously transmitted data is transmitted, and the rest is not transmitted. By doing so, the data transmission amount can be effectively reduced without missing important data. This is advantageous in terms of reducing power consumption for data transmission and extending the life of the battery 1d.

[0030] Also, according to this embodiment, in addition to transmitting the second data, by transmitting the data at the time when a predetermined time has elapsed since the previous transmission as the third data, the blank period during which no data is transmitted is limited to at most this predetermined time. Here, consider the timing chart shown in FIG. 5. In this example, since the amount of change in pressure is small, if the third data is not transmitted, a complete blank period will occur from the transmission of the first data in the first cycle to the 33rd cycle. Therefore, for the external system 3, it is impossible to distinguish whether this blank period is due to an agreement in data transmission or due to some failure or malfunction on the data transmission device 1 side. On the other hand, when the third data is transmitted in the 11th, 21st, and 31st cycles as in this embodiment, the blank period is limited to 10 cycles, and the unlimited blank period is eliminated. This is advantageous for the external system 3 side in that it can effectively determine the normal / abnormal state of the data transmission device 1, that is, in terms of survival confirmation.

Explanation of Reference Numerals

[0031] 1 Data transmission device 1a Pressure sensor 1b Data extraction unit 1c Wireless transmission unit 1d Battery 2 Jack 3 External system 3a Data reception unit 3b Storage unit 3c Screen generation unit 4 Client

Claims

1. A data transmission device that transmits the operating pressure of a jack as data, and an information providing device that provides information based on the data received from the data transmission device, wherein the data transmission device, a pressure sensor that detects the operating pressure of the jack, a data extraction unit that extracts data that changes beyond a predetermined reference with respect to the previously transmitted data and data at a time point when a predetermined time has elapsed since the previous transmission from the data periodically acquired by the pressure sensor, a wireless transmission unit that wirelessly transmits the data extracted by the data extraction unit to an external system that stores the data, and has, wherein the information providing device, a data receiving unit that receives data related to the operating pressure of the jack from a plurality of the data transmission devices associated with each of a plurality of jacks arranged on a structure, a storage unit that stores the data received by the data receiving unit, a screen generation unit that generates a display screen that displays the operating pressure of the jack in a positional relationship associated with the location where the jack is arranged based on the data read from the storage unit, The screen generation unit generates the display screen that displays the operating pressure and the load calculated from the pressure receiving area, and an information processing system characterized by this.

2. The information processing system according to claim 1, wherein the screen generation unit generates the display screen that can switch and display the operating pressure and the load calculated from the pressure receiving area.

3. The information processing system according to claim 1 or 2, wherein the screen generation unit generates the display screen that displays the figure corresponding to the arrangement location in a color corresponding to the range to which the operating pressure corresponding to the arrangement location belongs.

4. The information processing system according to any one of claims 1 to 3, wherein the predetermined time is n times (n is an integer of 2 or more) the data acquisition cycle in the pressure sensor.

5. The information processing system according to any one of claims 1 to 4, wherein the data extraction unit unconditionally extracts the data first acquired by the pressure sensor as the data to be transmitted to the external system.

6. The information processing system according to any one of claims 1 to 5, further comprising a battery that supplies power to the circuit in the data transmission device.

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