JP2008236107A - Radio apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To detect tilt, while suppressing increase in the manufacturing cost. <P>SOLUTION: An inclinometer 22 measures the tilt degree of a base station apparatus 100. A thermometer 24 measures temperature of the base station apparatus 100. A derivation portion 26 derives a correction value based on the measured temperature, while referring to a memory 28 storing a relation between temperature and a correction value for correcting a value of the degree of tilt measured at the inclinometer 22. A correction portion 30 corrects the value of the degree of tilt measured at the inclinometer 22, according to the derived correction value. An alarm portion 32 outputs an alarm using a wireled communication function, when the corrected value of the degree of tilt becomes larger than a threshold. The thermometer 24 measure temperature for a predetermined period and the derivation portion 26 generates a relation between the correction value and the temperature, while inclinometer 22 measures the degree of tilt. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a wireless device, and more particularly to a wireless device installed at a predetermined location.

An example of the physical quantity sensor is an acceleration sensor, and these are configured by a piezo type (semiconductor strain gauge type) or a capacitance type (capacitor interval change type). In a physical quantity sensor that converts such a physical quantity into electrical resistance, an error due to the influence of the ambient temperature may be included in the output value. Therefore, in order to reduce the error of the output value, the output value should be corrected according to the ambient temperature. For example, the temperature sensor detects the ambient temperature, and the memory stores a correction table in which the temperature and the correction data are associated with each other. The sensor acquires correction data while referring to the correction table based on the detected ambient temperature. Further, the output value is corrected by the acquired correction data (see, for example, Patent Document 1).
JP 2004-85562 A

  In a mobile phone system and a second generation cordless phone system, a base station device and a terminal device are connected by a wireless line. The base station apparatus is fixedly installed at various places and forms a communication area. When the base station apparatus installed in this way is inclined for some reason, the direction of the radio wave radiated from the antenna of the base station apparatus is different from the originally intended direction. As a result, a desired communication area is not configured. In order to cope with this, a tilt sensor is mounted on the base station apparatus, but as described above, the temperature correction is required for the output value of the tilt sensor. On the other hand, in order to reduce the manufacturing cost of the base station apparatus, it is desirable that the inclination sensor is inexpensive. In such a tilt sensor, the tilt angle is not corrected with high accuracy in the temperature range of the base station apparatus, for example, in the range of −30 degrees to 50 degrees, and the characteristics vary due to individual differences. Therefore, it is required to create a correction table for each base station device before shipment. However, the creation of such a correction table leads to an increase in the manufacturing cost of the base station device.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a wireless device having a function for detecting an inclination while suppressing an increase in manufacturing cost.

  In order to solve the above-described problem, a wireless device according to an aspect of the present invention is a wireless device having a wireless communication function, and includes a first measurement unit that measures a degree of inclination of the wireless device, and a first measurement unit. A second measuring unit that measures the temperature of the wireless device when the degree of inclination is measured in, and the degree of inclination measured in the first measuring unit based on the temperature measured in the second measuring unit Referring to a memory storing the relationship between the correction value for correcting the value and the temperature, a deriving unit for deriving the correction value, and the degree of inclination measured in the first measurement unit by the correction value derived in the deriving unit And a warning unit that outputs a warning while using the wired communication function when the value of the degree of inclination corrected by the correction unit exceeds a threshold value. The deriving unit has a means for generating a relationship between the correction value and the temperature by causing the second measuring unit to measure the temperature while allowing the first measuring unit to measure the degree of inclination over a predetermined period, and the generated relationship Is stored in a memory.

  According to this aspect, since a correction value for correcting the value of the degree of inclination is generated over a predetermined period and correction is performed using the generated correction value, generation of a correction value at the time of manufacturing can be eliminated, and the manufacturing cost can be reduced. It is possible to detect the inclination while suppressing the increase of.

  When the derivation unit generates the relationship between the correction value and the temperature, if the value of the degree of inclination measured in the first measurement unit becomes larger than the threshold value, the derivation unit stops generating the relationship, and the warning unit May be output. In this case, since the generation of the relationship is stopped when the measured value of the degree of inclination becomes larger than the threshold value, the accuracy of the relationship between the correction value and the temperature can be improved.

  It should be noted that any combination of the above-described constituent elements and a conversion of the expression of the present invention between a method, an apparatus, a system, a recording medium, a computer program, etc. are also effective as an aspect of the present invention.

  According to the present invention, the inclination can be detected while suppressing an increase in manufacturing cost.

  Before describing the present invention specifically, an outline will be given first. An embodiment of the present invention relates to a base station apparatus in a mobile phone system or a second generation cordless phone system. The base station device has a wireless communication function at one end and performs wireless communication with a plurality of terminal devices. The base station apparatus has a wired communication function at the other end, and executes wired communication with the wired network. With such a configuration, the base station device relays data between a terminal device that is performing wireless communication and a communication device that is performing wired communication. Such a base station apparatus is fixedly installed in a predetermined place, for example, a utility pole, and as described above, the inclination of the base station apparatus is detected by mounting the inclination sensor. Further, since the output value of the tilt sensor varies depending on the temperature, the variation due to temperature should be corrected. In order to correct fluctuation due to temperature while suppressing an increase in manufacturing cost, the base station apparatus according to the present embodiment executes the following processing.

  The base station apparatus acquires the slope value and the temperature in association with each other over a predetermined period after the base station apparatus is installed. After the predetermined period, the base station apparatus creates a table (hereinafter referred to as “correction value table”) indicating the relationship between the temperature and the correction value based on the acquired slope value and temperature. Remember this. After that, the base station apparatus acquires the inclination value and the temperature, and derives the correction value while referring to the correction value table based on the temperature. Further, the base station apparatus corrects the slope value with the correction value. Further, when the corrected inclination value becomes larger than the threshold value, the base station apparatus outputs a warning to the monitoring center via the wired network.

  FIG. 1 shows a configuration of a base station apparatus 100 according to an embodiment of the present invention. The base station device 100 includes a radio unit 10, a detection unit 20, a central control unit 40, and a wired unit 50. The detection unit 20 includes an inclinometer 22, a thermometer 24, a derivation unit 26, a storage unit 28, a correction unit 30, and a warning unit 32. Further, the base station apparatus 100 is connected to the network 34.

  The wireless unit 10 has a wireless communication function, thereby performing wireless communication with a terminal device (not shown). As a reception process, the wireless unit 10 performs frequency conversion on a radio frequency signal received from a terminal device (not shown) to generate a baseband signal. The radio unit 10 also performs demodulation on the baseband signal. The radio unit 10 outputs the demodulated result to the central control unit 40. On the other hand, the radio unit 10 performs modulation on the signal input from the central control unit 40. Further, the radio unit 10 performs frequency conversion on the modulated baseband signal to generate a radio frequency signal. Further, the radio unit 10 transmits a radio frequency signal.

  Here, when the radio unit 10 connects a plurality of terminal apparatuses, the TDI (Time Division Multiple Access), FDMA (Frequency Division Multiple Access), CDMA (Code Division Multiple Access), Sce (Sc) Or any combination thereof is performed. Since these are known techniques, description thereof is omitted here.

  The central control unit 40 is an interface between the wireless unit 10 and the wired unit 50. The wired unit 50 has a wired communication function, and executes wired communication with a communication device connected to the network 34. Here, the network 34 may be an IP (Internet Protocol) network or an ISDN (Integrated Services Digital Network), but the wired unit 50 has a function corresponding to such a network.

  The inclinometer 22 measures the degree of inclination of the base station apparatus 100. The inclinometer 22 measures the inclination by using a semiconductor piezo type or a capacitance type, but can also be used as an acceleration sensor. The piezo type is a known technique. The tilt value or acceleration is derived by known techniques. The inclinometer 22 outputs the measured inclination value to the correction unit 30. Note that the inclinometer 22 also outputs the measured inclination value to the deriving unit 26 over a predetermined period.

  The thermometer 24 measures the temperature of the base station apparatus 100 when the inclinometer 22 measures the degree of inclination. Here, the thermometer 24 measures temperature by a known technique. The timing for measuring the temperature with the thermometer 24 and the timing for measuring the tilt with the inclinometer 22 are determined in advance. For example, periodic measurements are defined every minute. The thermometer 24 outputs the measured temperature to the derivation unit 26.

  The deriving unit 26 creates a correction value table for a predetermined period, for example, one week after installation, and stores the created correction value table in the storage unit 28. The deriving unit 26 derives a correction value while referring to the correction value table stored in the storage unit 28 when the correction value table is not created. Here, the former process will be described, and then the latter process will be described. The deriving unit 26 periodically acquires the value of the degree of inclination measured by the inclinometer 22 and the temperature measured by the thermometer 24 while associating them. In addition, the deriving unit 26 stores the value of the associated degree of inclination and the temperature in the storage unit 28.

  FIG. 2A shows the structure of data stored in the storage unit 28, and shows the value of the degree of inclination and temperature associated with each other. As shown, the measurement date, temperature, and angle are shown. Returning to FIG. After the predetermined period, the derivation unit 26 calculates an average value of angles for each temperature based on the data stored in the storage unit 28, and sets the average value as a correction value at that temperature. Further, by executing the same processing for various temperatures, a correction value table is generated, and the derivation unit 26 stores the correction value table in the storage unit 28. Here, the correction value table can be said to be a relationship between the correction value and the temperature.

  FIG. 2B shows the structure of data stored in the storage unit 28 and shows a correction value table. As shown, a correction value for temperature is shown. Returning to FIG. Note that the derivation unit 26 stops generating the correction value table if the value of the degree of inclination measured by the inclinometer 22 becomes larger than the threshold value when generating the correction value table. Further, in this case, the deriving unit 26 outputs a warning from a warning unit 32 described later to a monitoring center (not shown) via the central control unit 40 and the wired unit 50. Here, the monitoring center is connected to the network 34.

  Next, the latter process will be described. The deriving unit 26 receives the temperature measured by the thermometer 24 and derives a correction value based on the temperature while referring to the correction value table stored in the storage unit 28. The deriving unit 26 outputs the derived correction value to the correcting unit 30. The correction unit 30 corrects the value of the degree of inclination measured by the inclinometer 22 with the correction value derived by the derivation unit 26. For example, it is assumed that the temperature measured by the thermometer 24 is “20.0 ° C.” and the value of the slope measured by the inclinometer 22 is “0.77 degrees”.

  Further, since the correction value is derived as “0.77 degree” by the deriving unit 26, the correction unit 30 subtracts the correction value “0.77 degree” from the inclination value “0.77 degree”. Deriving “0 degree”. The correction unit 30 outputs the corrected value of the degree of inclination to the warning unit 32. The warning unit 32 outputs a warning to a monitoring center (not shown) via the central control unit 40 and the wired unit 50 when the value of the degree of inclination corrected by the correction unit 30 becomes larger than the threshold value.

  This configuration can be realized in terms of hardware by a CPU, memory, or other LSI of any computer, and in terms of software, it is realized by a program having a communication function loaded in the memory. Describes functional blocks realized by collaboration. Accordingly, those skilled in the art will understand that these functional blocks can be realized in various forms by hardware only, software only, or a combination thereof.

  The operation of base station apparatus 100 configured as above will be described. FIG. 3 is a flowchart showing a procedure for measuring the slope value in the base station apparatus 100. If the correction value table has not been created by the deriving unit 26 (N in S10), the deriving unit 26 acquires the value of the inclination from the inclinometer 22 and acquires the temperature from the thermometer 24 (S12). If the slope value is not an abnormal value (N in S14) and the timer has not expired (N in S16), the process returns to Step 12. If the timer expires (Y in S16), the deriving unit 26 creates a correction value table (S18), and stores the correction value table in the storage unit 28 (S20). On the other hand, if the slope value is an abnormal value (Y in S14), the deriving unit 26 stops creating the correction value table, and the warning unit 32 outputs a warning (S22).

  If the correction value table has been created by the deriving unit 26 (Y in S10), the inclinometer 22 acquires the value of the inclination, and the thermometer 24 acquires the temperature (S24). The deriving unit 26 derives a correction value by referring to the correction value table stored in the storage unit 28 based on the temperature (S26). The correcting unit 30 corrects the inclination value by the derived correction value (S28). If the slope value is an abnormal value (Y in S30), the warning unit 32 outputs a warning (S32). If the slope value is not an abnormal value (N in S30), the process is terminated.

  According to the embodiment of the present invention, the correction value table is automatically generated over the initial period of installation, and correction is performed using the generated correction value table, so that it is not necessary to generate the correction value table at the time of manufacturing. In addition, since it is not necessary to generate a correction value table at the time of manufacturing, the inclination can be detected while suppressing an increase in manufacturing cost. In addition, since the correction value table is automatically generated, it is not necessary to create a correction value table for each individual during manufacturing. Further, since the correction value table is automatically generated, the accuracy of the correction value table can be improved. Further, since the accuracy of the correction value table is improved, the accuracy of detecting the inclination can be improved. Further, when the measured value of the degree of inclination becomes larger than the threshold value, the generation of the correction value table is stopped, so that the accuracy of the correction value table can be improved. When the measured value of the degree of inclination becomes larger than the threshold value, a warning is output, so that the administrator of the communication system can be alerted.

  In the above, this invention was demonstrated based on the Example. This embodiment is an exemplification, and it will be understood by those skilled in the art that various modifications can be made to the combination of each component and each processing process, and such modifications are also within the scope of the present invention. .

  In the embodiment of the present invention, the base station apparatus 100 is the subject of the description. However, the present invention is not limited thereto, and for example, a communication device that does not have a wireless communication function may be used. According to this modification, the present invention can be applied to various devices. That is, it is sufficient to provide an interface for outputting a warning to the monitoring center.

  In the embodiment of the present invention, the derivation unit 26 creates a correction value table over an initial period after installation. However, not limited to this, for example, the derivation unit 26 may create the correction value table over a period other than the initial period after installation. For example, the derivation unit 26 creates a correction value table at the timing when the season changes. According to this modification, the correction value table is created according to the season, so the accuracy of the correction value table can be improved.

It is a figure which shows the structure of the base station apparatus which concerns on the Example of this invention. FIGS. 2A and 2B are diagrams showing the structure of data stored in the storage unit of FIG. 3 is a flowchart showing a procedure for measuring a value of inclination in the base station apparatus of FIG.

Explanation of symbols

  10 wireless units, 20 detection units, 22 inclinometers, 24 thermometers, 26 derivation units, 28 storage units, 30 correction units, 32 warning units, 34 networks, 40 central control units, 50 wired units, 100 base station devices.

Claims (2)

A wireless device having a wireless communication function,
A first measurement unit that measures the degree of inclination of the wireless device;
A second measuring unit for measuring the temperature of the wireless device when measuring the degree of inclination in the first measuring unit;
Based on the temperature measured in the second measurement unit, correction is performed while referring to a memory storing the relationship between the correction value and the temperature for correcting the value of the degree of inclination measured in the first measurement unit. A derivation unit for deriving a value;
A correction unit that corrects the value of the degree of inclination measured in the first measurement unit with the correction value derived in the deriving unit;
A warning unit that outputs a warning while using a wired communication function when the value of the degree of inclination corrected by the correction unit is larger than a threshold value;
The derivation unit is configured to generate a relationship between a correction value and a temperature by causing the second measurement unit to measure a temperature while allowing the first measurement unit to measure a degree of inclination over a predetermined period; A wireless device comprising: means for storing the generated relationship in the memory. When the derivation unit generates the relationship between the correction value and the temperature, if the value of the degree of inclination measured in the first measurement unit is greater than a threshold value, the generation of the relationship is stopped.
The wireless device according to claim 1, wherein the warning unit outputs a warning.

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