JP2959191B2 - Positioning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a positioning device suitable for being carried on a battery.

[0002]

2. Description of the Related Art For example, a positioning device that receives a radio wave from a GPS satellite and performs positioning is not generally assumed to be large and portable.

Therefore, a portable positioning device intended for outdoor use has been proposed by the present applicant, and the positioning device is basically driven by a battery as a power supply.

In general, positioning data is updated within 2 to 3 seconds. However, such positioning data may not be necessary in practical use.

[0005]

Therefore, updating of positioning data and the like is minimized and the same battery can be used.
It is desirable that the device be driven for as long as possible.

[0006] It is an object of the present invention to provide a positioning device that can extend the driving time with the same battery.

[0007]

The present invention positioning device SUMMARY OF THE INVENTION, the first power-on control means 3, 5 is turned on at every predetermined time T ₀ power required at least in the main operation is set in advance
And a second preset time from when the power is turned on.
The second predetermined time T ₁ is changed based on the input from the power cutoff control means 3, 5 whose power is turned off in response to the lapse of the predetermined time T _1, and the external input means 3. Things.

[0008]

[Action] As the power of the accordance if the measuring apparatus of the present invention can intermittently change the power-on time in response to an input from the external input means 3 it is possible to reduce the power consumption because so as to ₁ on the predetermined time T Therefore, the positioning device can be operated satisfactorily.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the positioning device according to the present invention will be described below with reference to the drawings.

In FIG. 1, an output signal from an external input unit 3 and a timer control unit 5 are respectively taken into a control unit 1 mainly composed of a microcomputer or the like. Then, the operation control of the main operation unit 7 of the positioning device (the operation unit serving as the main body of the positioning device function) is performed.

The external input unit 3 is, for example, a GP.
A receiver for receiving radio waves from the S satellite, various operation buttons, and the like are included.

Then, in the timer control unit 5,
As shown in FIG. 2, if necessary, a time interval T ₀ (for example, 10 minutes to 90 minutes) for turning on the power supplied to the main operation unit 7 (awake state) is set. A time T ₁ (awake time; for example, 20 seconds) to be turned on and a time to be turned off (sleep state) are set.

In this case, a trigger pulse is input from the timer control unit 5 to the control unit 1 at an interval of time T _O , and the pulse width of the trigger pulse is set to the time T _O.
Has been set to ₁ .

Here, the processing procedure performed by the control unit 1 which is a main part of the present invention will be described with reference to the flowchart of FIG.

First, when a power save function (intermittent operation) in which the power is turned on at intervals of time T ₀ is selected by a predetermined operation (step S ₁ YES), if the current state is an awake state (step S _3). YES), as a condition that the there is no continuation request of Aueiku state, waiting for the time-up of Aueiku time T _1.

In this case, the continuation request of the awake state includes a key input from the external input unit 3, the convenience of each application unit program of the apparatus, and the like.

[0017] Then, when the time is up in step S _11, the power supply to the main operation unit 7 is cut off is in a sleep state (Step S _13), such as a key input from the external input unit 3, Aueiku by external factors if a request for return state (step S ₁₅ NO), the routine proceeds to step S _20,
Processing other than the power save function is performed.

Meanwhile, if there is a request Aueiku return state in step S _15, the main operation unit 7 is in Aueiku state (step S _17).

[0019] Then, if the sleep state in step S _3, the process proceeds to step S _20, the process proceeds to step S ₂₀ if there is no time up in the step S _11.

Further, at step S _5, if there is continuous demand, time Aueiku state as understood from FIG. 2 is updated only additional time T ₁ from the time T ₁ (step S ₇ YES) (step S ₉ ), the time of the result Aueiku state becomes T _2.

As described above, this embodiment has the power saving function, so that the updating of the positioning data and the like can be set to the minimum necessary.

Accordingly, unnecessary power consumption can be avoided and the driving time of the device can be extended.

In this case, the times T _O , T
_{Since 1} is set, inconvenience in use cannot occur.

Since the power saving function can be realized by software, it is preferable that the power saving function is automatically canceled when an external power supply can be used.

[0025]

As will be understood from the above description, in the positioning apparatus according to the present invention, at least the power supply required for the main operation is turned on at predetermined time intervals, and the power supply required for the main operation is turned on for a predetermined time period after the power is turned on. After the elapse, the power is turned off.

Therefore, unnecessary power supply is not performed, so that the driving time can be extended. In addition, since the power-on time is changed according to an external factor, the positioning device can be operated satisfactorily.

[Brief description of the drawings]

FIG. 1 is a system block diagram of a preferred embodiment of a positioning device according to the present invention.

FIG. 2 is a timing chart showing an operation of the positioning device.

FIG. 3 is a flowchart showing an operation of the positioning device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Control part 3 External input part 5 Timer control part 7 Positioning device main operation part

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Mami Okamura 6-7-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation (56) References JP-A-3-107782 (JP, A) JP-A-Hei 1-138890 (JP, A) Japanese Patent Publication No. 63-56730 (JP, B2) Japanese Utility Model Publication No. 63-5399 (JP, Y2) (58) Field surveyed (Int. Cl. ⁶ , DB name) G01S 5/00 -5/14 G01C 21/00 H02J 7/00

Claims (1)

(57) [Claims] 1. A power-on control means for turning on at least a power supply required for a main operation at every preset first predetermined time, and a second on / off control from a time when the power supply is turned on. And a power-off control unit for turning off the power supply in response to a lapse of the predetermined time period, and changing the second predetermined time period based on an input from an external input unit.