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Management device, management method, and program recording medium

A technology for managing equipment and equipment, applied in the direction of electrical digital data processing, special data processing applications, digital data processing components, etc., can solve problems such as accuracy problems, no measurement of oscillator oscillation frequency offset errors, etc.

Inactive Publication Date: 2012-04-04
NEC PLATFORMS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the technique described in Patent Document 1, the error of the oscillation frequency shift (shift) of the oscillator is not measured by the position measurement operation of the GPS
Therefore, the technique described in Patent Document 1 has an accuracy problem

Method used

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  • Management device, management method, and program recording medium
  • Management device, management method, and program recording medium
  • Management device, management method, and program recording medium

Examples

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no. 2 example

[0058] Next, refer to figure 1 and Figure 6 A second exemplary embodiment is described. The control unit 201 controls the oscillation frequency for the error (TCXO frequency offset) based on the error associated with the temperature close to the measured temperature when the temperature measured by the temperature sensor is not associated with the error in the error table. In addition, the same reference numerals are used for elements having the same functions as those of the above-described exemplary embodiments, and detailed descriptions will be omitted.

[0059] In the error table management part 301 of the second exemplary embodiment, it is judged that the presence or absence of the information in the error table is listed as "existing" in the temperature range of the TCXO frequency offset and the presence or absence of the information is listed as "not present". Whether the difference between the TCXO frequency offsets in adjacent temperature ranges is greater than any...

no. 4 example

[0074] Next, refer to figure 1 and Figure 8 A fourth exemplary embodiment is described. In addition, the same reference numerals are assigned to elements having the same functions as those of the above-described exemplary embodiments, and detailed descriptions will be omitted. Operations and configurations that are different from the first exemplary embodiment, the second exemplary embodiment, or the third exemplary embodiment will be described.

[0075] Before performing the position measurement by GPS in process A5, the schedule management section 304 investigates whether the position measurement environment has changed since the last position measurement by GPS. When it is determined that the environment has not changed based on the investigation result, the schedule management section 304 performs control so that the GPS unit 102 does not perform position measurement by GPS. A change in the position measurement environment is a change in the environment that affects th...

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Abstract

The invention discloses a management device, a management method, and a program recording medium. An example of the object of the present invention is to provide a technology with which a high precision error table for an oscillation frequency is created. The present invention includes a temperature sensor which measures temperature of the oscillator used in a GPS (Global Positioning System) when a position measurement by the GPS is performed, and a management unit which measures error of an oscillation frequency of the oscillator after the position measurement by the GPS has been performed, creates and stores an error table in which the measured temperature by the temperature sensor is associated with the error.

Description

technical field [0001] The present invention relates to a management device, a management method and a program recording medium. Background technique [0002] GPS (Global Positioning System) receiver sensitivity is directly affected by the accuracy of the clock used in GPS. Therefore, a high-precision clock is necessary. The clock frequency changes with environmental changes such as temperature changes, with time, and so on. That is, it is well known that frequency errors of clocks are generated. A technique for correcting frequency errors is proposed in Japanese Patent Application Laid-Open No. 2009-222486 (Patent Document 1). [0003] In the technique described in Patent Document 1, an error in the oscillation frequency of a clock oscillator (voltage-controlled oscillator) is measured, the oscillator is calibrated by controlling the voltage based on the measurement result, and when the calibration is performed, the The voltage data associated with the temperature is st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03B5/04
CPCG06F19/00G06F1/3203G01S19/23G01S19/235
Inventor 佐佐木辉夫
Owner NEC PLATFORMS LTD