JP3559291B2 - Pointer display clock - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a maximum value display method for a pointer type display device.
[0002]
[Prior art]
In recent years, a pointer-type display device having a meter function such as a depth gauge using a plurality of motors has been developed. In the pointer type display device, measured values such as water depth are always displayed for each measurement, but there is no one that displays the maximum value during measurement at the same time, and if you want to know the maximum value, It is common to memorize and call the maximum value after the measurement is completed.
[0003]
[Problems to be solved by the invention]
However, while a diver using a depth gauge finishes diving and ascends, the range within which he can ascend to the sea surface without stopping for decompression is determined by the dive depth and dive time. Is very important.
SUMMARY OF THE INVENTION An object of the present invention is to provide a pointer-type display device that can simultaneously display a dive depth and a maximum dive value in a depth gauge function or the like that is related to the danger of life and can be used by a diver with peace of mind.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a sensor that outputs a physical quantity signal, a signal processing unit that inputs the physical quantity signal and outputs physical quantity information, and an arithmetic unit that calculates the physical quantity information to calculate hand movement pulse information A first motor drive circuit that outputs a motor drive signal based on hand movement pulse information calculated by the arithmetic unit; a first motor driven by the first motor drive circuit; and a first motor driven by the first motor In a pointer display type watch provided with a detection signal display hand,
A second motor drive circuit, a second motor driven by the second motor drive circuit, and a maximum value display hand driven by the second motor;
The arithmetic unit compares a maximum value stored in the maximum value storage unit with a maximum value storage unit that stores a maximum value of a value based on the physical amount information, and a value based on the physical amount information input at regular intervals. Comparing means, and a maximum value rewriting means for updating the storage value of the maximum value storage means,
As a result of the comparison by the comparing means, when the value based on the physical quantity information inputted at every certain time is larger than the maximum value stored in the maximum value storing means, the maximum value rewriting means updates the stored value. The arithmetic unit outputs hand movement pulse information to the second motor drive circuit.
[0005]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 2 is a plan view showing a watch with a water depth gauge which is an embodiment of the pointer type display device according to the present invention. Reference numeral 1 denotes a watch with a depth gauge, and reference numeral 2 denotes a register ring having a minute display scale engraved on the ring. Reference numeral 3 denotes a dial, and a minute display scale is engraved on a circumferential portion 3a of the dial 3. Since the display unit of the depth gauge described later is 1 m per minute scale, the display scale of the minute also serves as the display scale of the depth gauge. Further, numerical values are engraved on display scale positions corresponding to the 3m, 6m, 9m positions and the like so that the depth gauge can be easily read. The display of the water depth on the dial 3 is a display area from the 12 o'clock position (0 m scale position) to the 55 minute scale position (55 m scale position), and the area from the 55 m scale position to the 12 o'clock position is water depth measurement. The area of the over display and the function mode display are provided. The center of the dial 3 is provided with a time display hand such as an hour hand 4, a minute hand 5, and a second hand 6, a depth hand 7 and a water depth of a maximum depth hand 8 also serving as a function mode hand. A function indicator hand is provided.
[0006]
Reference numeral 9 denotes a small-sized plate, and a display scale of a depth gauge is engraved on a circumferential portion 9a in units of 0.1 m, and a sub-depth hand 10 provided at the center portion displays 1 m for each rotation. . The hour hand 4, minute hand 5, second hand 6, depth hand 7, auxiliary depth hand 10, and maximum depth hand 8 are configured to be driven by different motors. Reference numerals 11, 12, and 13 denote push buttons, and reference numeral 14 denotes a crown, all of which constitute an external operation member for correction. The push button 11 is a function mode switching button for designating switching to a time mode, a depth alarm set mode, and a water depth measurement mode. By operating the push button 11, the maximum depth hand 8 moves on the circumferential portion 3a of the dial 3. An instruction is given to switch between an “EX” position indicating the time mode, an “AL” position indicating the depth alarm set mode, and a “12:00 (0 m)” position indicating the water depth measurement mode.
[0007]
The push buttons 12 and 13 are external operation members for performing a function operation in each function mode. By operating the push button 12 in the time mode state, a memo call of the maximum depth can be performed, and the value of the maximum depth when the last dive was performed. Is operated by the maximum depth hand 8 and the push button 13 is operated, so that a sound monitor of a depth alarm and a rising speed warning alarm, which will be described later, can be heard. By operating the push buttons 12 and 13 in the depth alarm set mode, the depth alarm set value can be set to normal rotation or reverse rotation in units of 1 m. With this alarm set, the water depth in the water depth measurement mode is set to the set depth. When the alarm set value is exceeded, a depth alarm is issued. The rising speed warning alarm is notified because a sudden ascent (for example, 5 m or more per second) in the water depth measurement mode adversely affects the body. The crown 14 is a calendar with one-step pulling, and mechanically corrects time with two-step pulling.
[0008]
FIG. 3 is a block diagram showing a basic configuration of the watch with a depth gauge 1 shown in FIG. Reference numeral 20 denotes a microcomputer, which basically includes a CPU 20a, a RAM 20b, and a ROM 20c. A program for controlling the CPU 20a is written in the ROM 20c, and the CPU 20a works on information from the switch block 23 described later and exchanges data with the nonvolatile memory 29 or the RAM 20b described later according to the program. The operation signal is output to motor drive circuits 35, 36, and 37, which will be described later, based on the processed data as needed. The RAM 20b has a maximum value storage means for storing the maximum value, and the ROM 20c has a comparison means for comparing the detection signal with the storage value of the maximum value storage means, and stores the maximum value in accordance with the comparison signal of the comparison means. Maximum value rewriting means for rewriting is programmed in the storage means. Reference numeral 29 denotes a nonvolatile memory, which stores reference values (0 m, 50 m) for calculating the water depth value. Reference numeral 21 denotes a water pressure sensor made of a diaphragm type semiconductor which is a signal detecting means, and outputs an electric sensor signal according to a change in water pressure. Reference numeral 22 denotes a water pressure measurement circuit as a signal processing means, which is constituted by a well-known amplifier circuit and an A / D conversion circuit, and receives a sensor signal from the water pressure sensor 21 as input and outputs water depth information Ps. Reference numeral 24 denotes a crystal oscillator for generating a clock signal, and reference numeral 23 denotes a switch block. The switch block 23 is configured by switches controlled by push buttons 11, 12, 13, and a crown 14 shown in FIG.
[0009]
The first motor drive circuit 35, the second motor drive circuit 36, and the third motor drive circuit 37 output motor drive signals for driving the first motor 25, the second motor 26, and the third motor 27 based on an instruction from the microcomputer unit 20. The first motor drive circuit 35 outputs a time display device 30 in which the hour hand 4, the minute hand 5, and the second hand 6 are linked, and the second motor drive circuit 36 displays a water depth display constituted by the depth hand 7 and the auxiliary depth hand 10. In the device 31, the third motor drive circuit 37 independently drives the maximum depth hands 8 also serving as the function mode hands. Reference numeral 28 denotes a buzzer, which notifies the depth alarm and the rising speed warning alarm.
[0010]
FIG. 1 is a flowchart showing the operation of the watch 1 with a depth gauge shown in FIG. 3 in the depth measurement mode. First, the water depth mode is designated by operating the push button 11 which is the function mode switching button (step S1). When the water depth mode is designated, the microcomputer unit 20 turns on the water pressure measurement circuit 22 and starts water depth measurement (step S2). The water depth measurement is performed by the microcomputer unit 20 at regular intervals, and the water depth information Ps obtained by AD-converting the sensor signal from the water pressure sensor 21 is input to calculate the water depth value, and the water depth value is displayed for displaying the water depth value. The operation pulse Psd is calculated. Next, a determination is made as to whether the depth value is greater than or less than 1 meter (step 3). If the condition of YES is satisfied, the operation proceeds to the operating state of the motor for driving the depth needle drive (step S4), and the depth hand movement pulse calculated in step S2. The number Psd is output to the motor drive circuit 36. As a result, the motor 26 is driven by the output signal of the motor drive circuit 36, and displays the water depth on the water depth display device 31 (step S5).
[0011]
Next, a comparison is made as to whether the water depth value is greater than or less than the maximum value stored in the maximum value storage means (step 6). If the condition of YES is satisfied, the current depth value is stored as the maximum value by the maximum value rewriting means. (Step S7). Then, the process proceeds to the maximum depth hand drive motor operating state (step S8), and outputs the maximum depth hand movement pulse number Pmx calculated in step S2 to the motor drive circuit 37. As a result, the motor 27 is driven by the output signal of the motor drive circuit 37, and updates the maximum depth display (step S9). When the condition of NO is satisfied in the above (Step S6), the process directly returns to the water depth measurement start state in the above (Step S2), and the next measurement is started. That is, if the water depth value is smaller than the maximum value stored in the maximum value storage means in step S6, the water depth measurement is continued as it is, and if it is larger, the maximum depth display is updated and the water depth measurement is continued.
[0012]
Next, when the condition of NO is satisfied in the above (Step S3), the operation proceeds to the depth zero return (Step S10) state, and the depth hand 7 and the sub depth hand 10 which are presently displaying the depth value on the depth display device 31 are connected. When the display position is returned to the position of 0 meters and the operation determination of the mode switching button is performed (step S11) and the condition of NO is satisfied, the process returns to the above (step S2) to start the next water depth measurement. When the condition is satisfied, it is determined that the push button 11 has been operated in the 0 meter display state, the water depth measurement flow is terminated, the maximum depth hand is driven to the home position return state (step S12), and the mode shifts to the next function mode. .
[0013]
【The invention's effect】
As is clear from the above description, since the present invention can simultaneously display the current measured value and the maximum value on the hand-held timepiece , the present invention provides important information for a depth gauge function or the like that is related to the danger of life. it can.
[Brief description of the drawings]
FIG. 1 is a flowchart illustrating an operation in a water depth measurement mode of the present invention.
FIG. 2 is a plan view showing an embodiment of a pointer-type functional timepiece according to the present invention.
FIG. 3 is a block diagram showing a basic configuration of a pointer-type functional timepiece according to the present invention.
[Explanation of symbols]
1 Clock with a depth gauge 6 Second hand 7 Depth hand 8 Maximum depth hand 10 Secondary depth hand 20 Microcomputer unit 21 Water pressure sensor 25, 26, 27 Motor 31 Water depth display 35, 36, 37 Motor drive circuit

Claims (2)

A sensor that outputs a physical quantity signal, a signal processing unit that inputs the physical quantity signal and outputs physical quantity information, a computing unit that computes the physical quantity information to calculate hand movement pulse information, and a hand movement pulse calculated by the calculation unit A first motor drive circuit that outputs a motor drive signal based on the information, a first motor driven by the first motor drive circuit, and a pointer display type including a detection signal indicator hand driven by the first motor In the watch,
A second motor drive circuit, a second motor driven by the second motor drive circuit, and a maximum value display hand driven by the second motor;
The arithmetic unit compares a maximum value stored in the maximum value storage unit with a maximum value storage unit that stores a maximum value of a value based on the physical amount information, and a value based on the physical amount information input at regular intervals. Comparing means, and a maximum value rewriting means for updating the storage value of the maximum value storage means,
As a result of the comparison by the comparing means, when the value based on the physical quantity information inputted at every certain time is larger than the maximum value stored in the maximum value storing means, the maximum value rewriting means updates the stored value. And an operation unit for outputting hand movement pulse information to the second motor drive circuit. The arithmetic unit is constituted by a microcomputer having a RAM and a ROM, the RAM having the maximum value storage means, and the ROM is programmed with the comparison means and the maximum value rewriting means. The timepiece display type timepiece according to claim 1.

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