JPH0552713U - Altitude measuring device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide an altitude step display function that can inform where the current altitude is from the target and the altitude at the start. [Structure] The altitude at the starting point is stored in the L register 22B of the RAM 22 and the target altitude is stored in the H register 22A, and the altitude at the current point is calculated from the atmospheric pressure detected by the atmospheric pressure sensor 12 every one minute. From the calculated altitude and the altitude of the start point and the target altitude stored in the RAM 22, the number of lighting segments of the stage display unit 18C is calculated and displayed in the stage display unit 18C as a bar graph.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to an altitude measuring device that measures altitude using a barometric pressure sensor.

[0002]

[Prior Art]

 2. Description of the Related Art Conventionally, there is known an altitude measuring device that detects an external pressure with a pressure sensor and measures altitude, water depth, etc. from the detected pressure. This type of altitude measuring device is configured to calculate numerical values such as altitude and water depth based on the detected external pressure and display the results numerically.

[0003]

[Problems to be solved by the device]

 However, since the conventional altitude measuring device has only a function of numerically displaying the measured altitude, it has a drawback that it is not possible to know how much altitude has been moved from a certain point to the present.

This is because when a user wants to know how much altitude the user has moved from a start point in a mountain climbing or mountain biking time trial, the user must remember it. It was very annoying because I had to calculate by myself from the altitude at the starting point and the numerical value of the altitude currently measured.

The present invention has been made in view of the above points, and is an altitude step display capable of informing where the current altitude is from the target and starting altitude. It is intended to provide an altitude measuring device with a function.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, an altitude measuring device according to the present invention comprises an atmospheric pressure sensor for detecting atmospheric pressure, a first calculating means for calculating an altitude from the atmospheric pressure detected by the atmospheric pressure sensor, and an altitude at a starting point. Storage means for storing the first altitude data shown and second altitude data showing the target altitude, and the first and second altitudes of the altitude calculated by the first calculation means, which are stored in the storage means. A second calculating means for calculating a distance from the altitude data, and a displaying means for displaying the altitude in a stepwise manner by displaying the distance calculated by the second calculating means in a graph. There is.

[0007]

[Action]

 That is, according to the altitude measuring device of the present invention, the first altitude data indicating the altitude at the starting point and the second altitude data indicating the target altitude are stored in the storage means, and the first altitude data is stored at predetermined intervals, for example. The altitude is calculated from the atmospheric pressure detected by the atmospheric pressure sensor by the calculating means, and the first and second altitudes stored in the storage means of the altitude calculated by the first calculating means are calculated by the second calculating means. By calculating the distance from the altitude data and displaying the distance calculated by the second calculating means in a graph on the display means, the altitude is displayed stepwise.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1A and 1B are respectively a block diagram and a front view of an electronic wrist watch to which an altitude measuring device according to an embodiment of the present invention is applied.

In these drawings, reference numeral 10 is a CPU for controlling the whole, 12 is an atmospheric pressure sensor for collecting pressure data, and 14 is a time measuring unit for measuring time. Reference numeral 16 is a key input unit for inputting target data. The key input unit 16 has a numeral input key 16A, an enter key 16B, a preset key 16C, and an atmospheric pressure / altitude switching key 16D.

Reference numeral 18 denotes a display unit, which includes a time display unit 18A for numerically displaying the time, a numerical display unit 18B for numerically displaying the target altitude or the current altitude, and a current altitude. It is composed of a stage display section 18C for displaying a bar graph or the like that informs where it is in the whole. The stage display unit 18C has a plurality of display segments arranged in a line.

Reference numeral 20 is a ROM that stores a control program for causing the CPU 10 to perform data calculation and processing, and 22 is a RAM that stores a target altitude and a starting altitude. Here, the RAM 22 stores an H register 22A for storing the target altitude, an L register 22B for storing the starting point altitude, a P ₀ register 22C for storing the starting point atmospheric pressure, and a local point atmospheric pressure. including the P _X register 22D, local point altitude H _X register for storing 22E, and the N register 22F for storing the lighting segment number.

Next, the operation in such a configuration will be described. First, the operation at the start point will be described with reference to the flowchart of FIG.

The preset mode is entered in response to the operation of the preset key 16D of the key input unit 16. In this preset mode, first, the input target altitude value which is instructed by the number of times the numerical input key 16A is operated and which is determined by operating the enter key 16B is stored in the H register 22A of the RAM 22 (step S1). Next, the input local point altitude value which is instructed by the number of operations of the numerical input key 16A and determined by the operation of the enter key 16B is stored in the L register 22B (step S2). Then, after the value of the atmospheric pressure detected by the atmospheric pressure sensor 12 is stored in the P ₀ register 22C (step S3), the preset mode is released (step S4). After exiting the preset mode as described above, the processing in the normal mode as shown in the flowchart of FIG. 2B is performed.

That is, when the timer 14 measures a predetermined time, here one minute, (step S11), the value detected by the atmospheric pressure sensor 12 is loaded into the P _X register 22D of the RAM 22 (step S12). . Here, this fetched value is converted into unit data that can be specifically compared, that is, altitude data, by a predetermined calculation formula, and this is stored in the H _X register 22E. Next, the number of lighting segments is calculated from the altitude data stored in the H _X register 22E, the target altitude stored in the H register 22A, and the altitude of the starting point stored in the L register 22B. Are stored in the N register 22F. Then, the altitude data stored in the H _X register 22E is displayed numerically on the numerical display unit 18B, and the segments of the stage display unit 18C are lit according to the number of lighting segments stored in the N register 22F, so that the current altitude is displayed as a whole. A bar graph or the like is displayed to inform the user of the location in the area (step S15). In addition, although the altitude was described in the above embodiment, it is needless to say that the water depth can be similarly measured. Further, in the above-mentioned embodiment, the stage display section 18C is displayed as a bar graph, but the present invention is not limited to this, and various display methods such as a pie chart can be considered.

[0015]

[Effect of the device]

 As described above in detail, according to the present invention, an altitude measuring device with an altitude step display function capable of notifying where the current altitude is located from the target and the altitude at the start is provided. Can be provided.

That is, according to the present invention, since it is possible to know how much the current altitude is with respect to the target altitude, it is possible to know the current state by mountain climbing or sky sports, and to plan for the future. It can be used to stand up.

[Brief description of drawings]

1A and 1B are a block diagram and a front view, respectively, of an electronic wrist watch to which an altitude measuring device according to an embodiment of the present invention is applied.

FIG. 2A is a flowchart for explaining the operation in the preset mode in the altitude measuring apparatus of the embodiment, and FIG. 2B shows the operation in the normal mode in the altitude measuring apparatus of the embodiment. It is a flow chart for explaining.

[Explanation of symbols]

10 ... CPU, 12 ... Atmospheric pressure sensor, 14 ... Timekeeping unit, 16
A ... Numeric input key, 16B ... Enter key, 16C ... Preset key, 16D ... Atmospheric pressure / altitude switching key, 18A
... Time display section, 18B ... Numerical value display section, 18C ... Stage display section, 20 ... ROM, 22 ... RAM.

Claims (1)

[Scope of utility model registration request] 1. An atmospheric pressure sensor for detecting an atmospheric pressure, a first calculating means for calculating an altitude from the atmospheric pressure detected by the atmospheric pressure sensor, a first altitude data indicating an altitude at a start point, and a first altitude indicating a target altitude. Storage means for storing the second altitude data, and second calculation means for calculating the distance of the altitude calculated by the first calculation means from the first and second altitude data stored in the storage means And a display unit for displaying the distance calculated by the second calculation unit in a graph to display the altitude stepwise, and an altitude measuring device comprising: