JP3413884B2 - Water depth display - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water depth display device for measuring and displaying water depth in water during diving.

[0002]

2. Description of the Related Art As a conventional structure for measuring the water depth at the time of diving, there is known a structure in which a pressure sensor such as a semiconductor diaphragm is used in a wristwatch type case and the water depth measured by the pressure sensor is displayed on a display screen. . That is, the increase and decrease of the hydrostatic pressure that changes depending on the water depth in water is measured by the pressure sensor,
This pressure value is converted into water depth and displayed.
With this, for example, in the application of scuba diving, it is useful in knowing the current water depth such as how far down to the water surface or how much remaining to reach the water surface. there were.

[0003]

However, the conventional device merely measures and displays the depth from the sea level to the current position. For example, what is the depth to the bottom of the sea where the user is about to dive? Alternatively, measuring the depth to the bottom of the sea, such as how many meters from the current position to the bottom of the sea, is based on the principle that the conventional device converts the hydrostatic pressure value into that depth. It was impossible.

The present invention has been made in consideration of the above circumstances, and has a structure in which not only the depth from the sea surface but also the distance to the sea bottom is measured and displayed, which is convenient for use. It is an object of the present invention to provide a water depth display device with improved performance.

[0005]

[Means for Solving the Problems] To achieve the above object
The water depth display device of the present invention includes a wristwatch case and the wristwatch.
It is arranged in the 12 o'clock direction of the case and sounds towards the 12 o'clock direction
And an acoustic transmitting means for transmitting
The water depth is measured by receiving the reflected sound of the transmitted sound and measuring the water depth.
Water depth measuring means for obtaining data, pressure sensor, and this pressure
Water that converts pressure data obtained by sensors into water depth data
Depth conversion means and water converted by this depth conversion means
Depth data and the water depth data measured by the water depth measuring means.
And display means for displaying
And

[0006]

[0007]

[0008]

[0009]

1 is a block diagram of an embodiment of the present invention. The water depth display device of this embodiment includes a clock mechanism 20, a first water depth measuring mechanism 21 for measuring the depth from the water surface, and a second water depth measuring mechanism 2 for measuring the distance from the current position to the water bottom.
2 and.

The clock mechanism 20 oscillates a reference frequency pulse which serves as a reference for various operations and clocks of this embodiment.
A frequency dividing circuit 2 for dividing the reference frequency pulse from the oscillation circuit 1 and a clock circuit 3 for measuring time based on a signal from the frequency dividing circuit 2. The timekeeping data from the timekeeping circuit 3 is output to and stored in the storage circuit 16 such as a RAM, and is also output to the display device 7 for time display.

The first water depth measuring mechanism 21 includes a sensor driving / amplifying circuit 9 and a pressure sensor 8 driven by the same path 9.
And an A / D conversion circuit 10 and a water depth calculation circuit 11. As the pressure sensor 8, a diaphragm type pressure sensor or the like that detects a variation value of pressure by a variation value of resistance is used, and the pressure sensor converts the water depth from the water surface into an electric signal. This signal is amplified by the sensor driving and amplifying circuit 9 and then converted into a digital value by the A / D conversion circuit 10. The water depth calculation circuit 11 converts this digital signal into water depth data. Then, the converted water depth data is stored in the storage circuit 16 and is output to the display device 7 to be displayed as the water depth from the water surface.

The second water depth measuring circuit 22 includes a transmitter / receiver 13 for acoustic waves such as ultrasonic waves, a transmitter circuit 12 for oscillating and transmitting acoustic waves such as ultrasonic waves, and a receiver for amplifying the sound waves received by the transmitter / receiver device 13. And an amplification circuit 14 and a depth calculation circuit 15 for calculating the depth of water to the bottom of the water. The wave transmitter / receiver 13 is composed of an electrostrictive oscillator or the like, and emits the sound transmitted from the transmission circuit 12 toward the water bottom and receives the reflected sound reflected from the water bottom. The reflected sound received by the wave transmitter / receiver 13 is amplified and detected by the reception / amplification circuit 14, and then output to the depth calculation circuit 15. The depth calculation circuit 15 calculates the distance to the water bottom, that is, the water depth from the current position to the water bottom, based on the time difference between the input time of the transmission signal from the transmission circuit 12 and the input time of the reception signal from the reception and amplification circuit 14. . The calculated water depth data is stored in the storage circuit 16 and is also output to the display device 7 to be displayed as the water depth to the water bottom.

Reference numeral 5 denotes a control circuit, which is the mechanism 2 described above.
The drive of 0, 21, 22 is controlled, and the display drive by the display device 7 is controlled through the display control circuit 6. Further, the memory circuit 16 is controlled to store the water depth data from the first and second water depth measuring mechanisms 21 and 22 in the memory circuit 16 in correspondence with the time measurement data from the timepiece mechanism 20. Reference numeral 17 denotes a stopwatch circuit which operates based on a signal from the frequency dividing circuit 2 and outputs a signal to the control circuit 5 at predetermined time intervals, for example, every 5 minutes. The control circuit 5 drives the first and second water depth measuring mechanisms 21 and 22 in response to the input of this signal to measure the respective water depths. Thereby, the water depth is automatically measured every predetermined time. The stopwatch circuit 17 has the operation switch 4a provided on the operation unit 4 set to 1
Each time the pressing operation is performed, the drive and the stop are alternately repeated. In addition, when the stopwatch circuit 17 is stopped, the control circuit 5 drives the first and second water depth measuring mechanisms 21 and 22 by pressing the other operation switch 4b of the operation unit 4, and the water depth is measured. Take a measurement.

FIG. 2 shows the external structure of this embodiment, in which the band mounting portion 31 having the pin insertion hole 31a is at 12 o'clock and 6 o'clock.
The watch case 30 is provided in the time direction, and the display screen 32 of the display device 7 arranged on the upper surface of the watch case 30. Pressure sensor 8 and operation switches 4a and 4b
Are arranged on both sides of the wristwatch case 30. The wave transmitter / receiver 13 measures the water depth up to the water bottom by driving the wave transmitter / receiver 13 with the wristwatch case 30 facing the 12 o'clock direction.

FIG. 3 shows an example of a display screen 32 provided on the wristwatch case 30. A first screen 33 for displaying the water depth in a bar graph and a second screen 33 for displaying the diving time in digital values.
Screen 34 and the third that displays the depth data and digital values
Screen 35. In the first screen 33, the water depth is plotted on the vertical axis and the diving time is plotted on the horizontal axis. 33a shows the depth of the diver from the water surface, and 33b shows the distance from the water surface to the water bottom. The first screen 33a normally displays the clock data of the clock mechanism 20, and when the stopwatch circuit 17 is started by operating the operation switch 4a, the water depth is switched and displayed. At this time, the first and second water depth measuring mechanisms 21 and 22 operate to measure the respective water depths every 5 minutes. Second
The screen 34 displays the dive time from when the operation switch 4a is pressed.
The digital display is performed based on the data from 7.
The third screen 35 displays the water depth from the water surface and the distance from the water surface to the water bottom in parallel. From these display data, in the screen of the illustrated example, 40 minutes after the start of diving, the point is located at the point “08”, which is a depth of 30 m from the water surface and 55 m from the water surface to the water bottom.
Suggests that.

FIG. 4 shows another example of the display screen 32. The first screen 36 for displaying the dive time, the second screen 37 for displaying the water depth from the water surface, and the distance from the current position to the water bottom are displayed. And a third screen 38 is provided. In this example, all screens are displayed by digital values.
5 ”, which suggests that at this point, the water depth is 30 m from the water surface, and the water bottom is 25 m.

As described above, since the water depth from the water surface and the water depth to the water bottom are measured and displayed, the current position and the distance to the water bottom can be confirmed, which is convenient for use.

[0018]

As described above, the present invention measures the distance to the water bottom in addition to the water depth from the water surface at the diving position,
Since these are displayed, effective data during diving can be visually recognized, which is convenient for use and enables safe diving.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is a front view showing an external configuration.

FIG. 3 is a front view of a display example.

FIG. 4 is a front view of another display example.

[Explanation of symbols]

7 Display 8 Pressure sensor 13 Acoustic transducer 16 Memory circuit

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G01C 13/00 G04G 1/00

Claims (2)

(57) [Claims] 1. A wristwatch case, and the wristwatch case is arranged at 12 o'clock direction.
Sound transmission means for transmitting sound to the sound source and reflected sound of sound transmitted by this sound transmission means.
Water depth measuring means for receiving and measuring water depth to obtain water depth data
And the pressure sensor and the pressure data obtained by this pressure sensor are converted to water depth data.
A depth conversion means for conversion, the conversion is water depth data by the depth converter
Display the water depth data measured by the water depth measuring means.
Depth display, characterized by having display means
apparatus. 2. The pressure sensor has a predetermined time.
It operates at intervals, and the sound transmission means operates the operation switch.
The water according to claim 1, wherein the water is operated according to the operation.
Depth display device.