JPH05118927A - Temperature meausring device - Google Patents

Abstract

PURPOSE:To detect the deepest part of water and the surfacial depth of water, to detect the water temperature at the bottom of the water and the water temperature at the surface of the water automatically and store the data in a memorandum. CONSTITUTION:When the deepes part of water is detected by the detection result of a pressure sensor 3, a CPU 11 saves the water temperature detected by a temperature sensor 4 as the water temperature at the bottom of the water in a RAM 13. Then, when a diver comes up to the water surface and the surfacial water depth is detected by the detection result of the pressure sensor 3, the water temperature detected by teh temperature sensor 4 at that time is stored as in the RAM 13 the water temperature at the surface of the water. The water temperature at the bottom of the water and teh water temperature on the surface of the water detected in this way are displayed on a display part 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature measuring device, and more particularly to a temperature measuring device for automatically measuring and storing the deepest water temperature and the surface water temperature during diving.

[0002]

2. Description of the Related Art When a diver dives, the water temperature is an important issue for diving. Particularly, for the diver, the deepest water temperature (water bottom water temperature) and the water temperature on the water surface are important. For this reason, conventionally, a diver carries a water temperature gauge while diving, and when he / she reaches the bottom of the water, he / she looks at the water temperature meter and memorizes the water temperature in his / her head or records it in a memo. After that, when it rises and reaches the surface of the water, it again looks at the water temperature gauge and remembers it or records it in a memo. That is, the conventional water thermometer detects the water temperature and outputs the detection result as a display.

[0003]

However, in such a conventional water thermometer, since the water temperature is simply detected and the detected water temperature is displayed and output, the diver does not know when the water bottom is reached. And when you reach the surface of the water, do you remember the displayed water temperature by looking at the water temperature gauge?
I had to record it in a memo. As a result, it is necessary to perform troublesome work such as remembering the water temperature and recording it in a memo, which causes a problem of hindering diving work and enjoyment of diving. In particular, there was a problem in forgetting the water temperature by itself when the diving was finished, when the water temperature was just remembered. Therefore, in the present invention, when diving is performed, in consideration of the stability of the water temperature detection means, first, the temperature of the deepest water depth is detected, the detection result is stored, and when the water surface is reached thereafter, the temperature of the water surface is determined. The purpose is to detect and store the result, so that the diver can store the water temperature without performing a troublesome work.

[0004]

In order to achieve the above object, the present invention provides a water depth detecting means for detecting a water depth, a water temperature detecting means for detecting a water temperature, and a deepest water depth based on a detection result of the water depth detecting means. And a water depth determining means for determining the water surface, and the determination result of the water depth determining means, the deepest water temperature detected by the water temperature detecting means at the deepest water depth and the water temperature when reaching the water surface after once reaching the deepest water depth. Water temperature storage means for storing the water surface water temperature detected by the detection means,
It is characterized by having. The water depth detection means,
For example, as described in claim 2, the water depth may be constantly detected, and the water temperature detection means may detect the water temperature each time the water depth detection means detects a predetermined water depth. Further, for example, as described in claim 3, the water depth detection means and the water temperature detection means may detect the water depth and the water temperature at predetermined time intervals. Further, the water temperature storage means, for example, as described in claim 4, after storing the deepest water depth, stores the water temperature for each predetermined water depth as the water depth becomes shallow, and the water surface when reaching the water surface. The water temperature may be stored, and, for example, as described in claim 5, display water output means for displaying and outputting each water temperature stored in the water temperature storage means may be provided.

[0005]

According to the present invention, when the diver dives, the water temperature during diving is detected by the water temperature detecting means, and the water depth is detected by the water depth detecting means. Based on the detection result of the water depth detection means, the water depth determination means determines the deepest water depth and the water surface, and the water depth determination means determines the deepest water depth,
The deepest water temperature detected by the water temperature detecting means at the deepest water depth is stored in the water temperature storage means. After that, when the water depth determination means determines that the water surface has been reached, the water surface temperature detected by the water temperature detection means is stored in the water temperature storage means. Therefore, the deepest deep water temperature (water bottom water temperature) and the water surface water temperature can be automatically stored, and the diver can
It is possible to save the work of remembering the water bottom temperature and the surface water temperature of each one by looking at the water thermometer and recording them in a memo, improving the workability of diving work and improving the enjoyment of diving. .. In addition, since the water surface temperature is detected and stored when it comes up to the surface at the end of the dive, the water temperature detecting means can detect the water surface temperature in a stable state, and the accurate water surface temperature can be detected and stored. can do. Further, if the water depth detecting means always detects the water depth and the water temperature detecting means detects the water temperature every time the water depth detecting means detects a predetermined water depth, the deepest water temperature and the water surface The water temperature can be reliably detected and stored. Further, when the water depth detecting means and the water temperature detecting means detect the water depth and the water temperature at predetermined time intervals, the deepest water temperature and the water surface temperature are detected and stored without being affected by the diving time. be able to. If the water temperature storage means stores the deepest water temperature and the surface water temperature and also stores the water temperature for each predetermined water depth as the water depth becomes shallower, the water temperature for each water depth in diving can be stored. Therefore, it is possible to automatically obtain more detailed water temperature data. Furthermore, by displaying and outputting the respective water temperatures stored in the water temperature storage means to the display output means, the required water temperature data can be promptly confirmed during the diving or after the diving is completed.

[0006]

EXAMPLES The present invention will be specifically described below based on examples. 1 to 5 are views showing an embodiment of the temperature measuring device according to the present invention. FIG. 1 is an external view of the temperature measuring device 1. The temperature measuring device 1 is provided with a pressure sensor 3 and a temperature sensor 4 in a body case 2. Further, the main body case 2 has a display section 5 and a preset key 6
A start / stop key 7 is provided, and a band 8 is further attached.

As the display unit 5, for example, a liquid crystal display device is used, and the surface thereof is covered with glass or the like.
The main body case 2 including the display portion 5 has a waterproof structure.

The pressure sensor 3 is a normal pressure sensor,
For example, a metal strain gauge, a semiconductor strain gauge, or the like is used to detect the pressure applied to the pressure sensor 3, particularly the water pressure.

As the temperature sensor (water temperature detecting means) 4, an ordinary temperature sensor is used to detect the environmental temperature, especially the water temperature.

The preset key 6 is a key that is turned on when setting the preset pressure.
When is input, the pressure at the time of input is stored as a preset pressure, as described later. This preset key 6
Immediately before diving, the atmospheric pressure above the water surface is stored as a preset pressure. This preset key 6 is provided because 1 atmospheric pressure cannot be used as a reference when diving in a high altitude lake.
This is because when the preset key 6 is turned on, the atmospheric pressure on the water surface of a high altitude lake or the like is set as the preset pressure.

The start / stop key 7 is turned on at the start and end of measurement of the deepest deep water temperature (usually the water bottom water temperature) and the water surface water temperature.

The band 8 is for mounting the temperature measuring device 1 on the arm of the diver, and the diver mounts the temperature measuring device 1 on the arm by the band 8 and dives.

FIG. 2 is a circuit block diagram of the temperature measuring device 1, which includes a CPU (Central Processing Unit) 11 and R.
OM (Read Only Memory) 12, RAM (Random Acces
s Memory) 13, an oscillation circuit 14, a frequency dividing circuit 15, a time counting circuit 16, A / D conversion circuits 17 and 18, a switch section 19, and the like.

The pressure sensor 3 is connected to the A / D conversion circuit 17, and the A / D conversion circuit 17 converts an analog detection signal input from the pressure sensor 3 into a digital signal, and the CPU 11 Output to.

The A / D conversion circuit 18 is connected to the temperature sensor 4, and the A / D conversion circuit 18 converts an analog detection signal input from the temperature sensor 4 into a digital signal, and the CPU 11 Output to.

The oscillator circuit 14 generates a clock signal having a predetermined basic frequency and outputs the clock signal to the frequency divider circuit 15. The frequency divider circuit 15 divides the frequency of the basic clock signal input from the oscillator circuit 14, It is output to the time counting circuit 16 as a clock signal having a predetermined cycle, for example, 1 Hz. The time counting circuit 16
It is provided with a counter for hours, minutes, and seconds, counts the clock signal input from the frequency dividing circuit 15, and generates time data for hours, minutes, and seconds. The time counting circuit 16 outputs time data and a carry signal a for every fixed time, for example, for one second, to the CPU 1.
Output to 1.

The switch unit 19 is the preset key 6 described above.
The start / stop key 7 and other keys not shown in FIG. 1 are collectively referred to, and operation signals of the respective keys are input from the switch section 19 to the CPU 11.

The ROM 12 stores a program as the temperature measuring device 1, in particular, a determination program for determining the deepest water depth and the surface water depth, a program for writing the water temperature data of the measurement result to the RAM 13, and a program for reading the water temperature data from the RAM 13. Therefore, the RAM 13 is used as a work memory and stores the water temperature data of the measurement result. That is, as shown in FIG. 3, in the RAM 13, a water depth storage area, a water temperature storage area, a water surface water temperature storage area, a water bottom water temperature storage area, a maximum water depth storage area, a preset pressure storage area, and a work area are formed. The latest water depth data is stored in the storage area. The latest water temperature data detected by the temperature sensor 4 is stored in the water temperature storage area, and the water surface water temperature data is stored in the water surface water temperature storage area. Further, the water bottom water temperature storage area stores water bottom water temperature data, and the maximum water depth storage area stores maximum water depth data during diving. The preset pressure data is stored in the preset pressure storage area. Therefore, the RAM 13 functions as a water temperature storage unit that stores the deepest deep water temperature and the surface water temperature.

The CPU 11 controls each part of the temperature measuring device 1 in accordance with the program in the ROM 12 to perform processing as the temperature measuring device, in particular, a water depth calculating process for calculating the water depth based on the pressure data input from the pressure sensor 3. ,
Discrimination processing between the deepest water depth and the water surface water depth, writing processing of the deepest water depth water temperature data and the water surface water temperature data to the RAM 13, and RA
The process of reading each water temperature data from M13 is performed. Further, the CPU 11 sends the measurement signal b to the A / D conversion circuits 17 and 18 and the pressure sensor 3 at a predetermined cycle, for example, every 10 seconds.
And the temperature sensor 4, and these are operated to measure the pressure and the water temperature in a predetermined cycle. Furthermore, the CPU 11
Reads out the water temperature data and the water depth data from the RAM 13 and outputs them to the display unit 5 together with the drive signal to display and output the water temperature and the water depth on the display unit 5. Further, the CPU 11 performs a time counting process of the current time, a stopwatch process, and the like based on the time data from the time counting circuit 16. Therefore, the CPU 11 functions as a water depth determination means that determines the deepest water depth and the water surface, and also functions as a water depth detection means that measures the water depth from the detection result of the pressure sensor 3 together with the pressure sensor 3.

The display unit 5 is driven by a drive signal from the CPU 11 and water temperature data, etc., and outputs various information such as data such as water temperature and water depth for display. Therefore, the display unit 5 functions as a display output unit for displaying and outputting each water temperature stored in the RAM 13.

Next, the operation will be described. At the time of diving, the diver wears the temperature measuring device 1 on the arm with the band 8 and, if necessary, turns on the preset key 6 and
Set the preset pressure.

The dive is started and the start / stop key 7 is turned on. When the start / stop key 7 is pressed, the temperature measuring device 1 performs an initialization process as shown in FIG. 4 (step S1). In this initialization processing, the RAM 13 is cleared, and in particular,
The water depth memory area, the water temperature memory area, the water surface water temperature memory area, the water bottom water temperature memory area, and the maximum water depth memory area of the RAM 13 are cleared.

When the initialization process is completed, the CPU
11 checks whether it is the output timing of the measurement signal b for every predetermined time (step S2), and when the output timing of the measurement signal b comes, outputs the measurement signal b and measures the water depth and the water temperature (step S3). .. As described above, the water depth is obtained by the CPU 11 performing arithmetic processing from the pressure (water pressure) detected by the pressure sensor 3 and the preset pressure. When the measured water depth and water temperature are written in the RAM 13, the maximum water depth stored in the RAM 13 is compared with the currently measured water depth to check whether the currently measured water depth is the maximum water depth (step S4). Since it is the first water depth at which the measurement is started, the current water depth becomes the maximum water depth, and the CPU 11 uses the current water depth as the maximum water depth in the RAM.
13 and the current water temperature as the water bottom temperature are written in the RAM 13 (step S5).

Thereafter, whether the maximum water depth is not 0 and the current water depth (current water depth in FIG. 4) is 0, that is,
After diving, it is checked whether or not the water depth has risen to 0 (water surface) after that (step S6). At this time,
The reason why the water surface temperature is not the water temperature at the start of diving is that if there is a temperature difference between the water temperature near the water surface and the water temperature, it will take time for the temperature sensor that is in equilibrium with the land temperature to equilibrate with the water temperature. For this reason, the measured temperature at the start of the dive is expected to have a large error, so the water temperature at the end of the dive is the surface water temperature. If the water temperature near the water surface is the same as the water temperature, the temperature sensor maintains equilibrium even in water, so no error will occur.Therefore, the water temperature at the start of diving may be the water surface temperature, but there is a temperature difference when there is a temperature difference. There are two kinds of processing processes when there is no.
Generally, there are many differences in temperature. Therefore, if the water temperature at the end of diving is set to the water surface temperature, the treatment process is shortened and the water surface temperature can be accurately measured.

In step S6, when the water surface depth is reached after diving, the water surface water temperature at that time is written and stored in the RAM 13 (step S7).

In step S6, if the water surface depth has not been reached after the dive, it is determined that the dive is continued, and it is determined whether the start / stop key 7 has been pressed (step S8), and the start / stop is performed. When the key 7 is not pressed, the process returns to step S2, and the water depth and the water temperature are measured at each output timing of the measurement signal b (step S3) in the same manner as above. When the measured water depth is the deepest water depth, the water bottom water temperature and the maximum water depth of the RAM 13 are updated (steps S4 and S5), and it is checked whether or not the water has risen after reaching the water surface after diving.
6) Further, when the measured water depth is not the deepest water depth in step S4, the process proceeds to step S6 without updating the data in the RAM 13.

After the above process is repeated to dive and measure the deepest water temperature, that is, the water bottom water temperature and store it, when the water surface is reached, the water temperature detected by the temperature sensor 4 at that time is stored in the RAM 13 as the water surface water temperature. (Step S
7).

That is, if the diving process proceeds as shown by the solid line arrow in FIG. 5, the temperature measuring device 1
After the dive is started, the water depth and the water temperature are sequentially measured and stored in the RAM 13, and it is checked whether the deepest water depth has been reached. When reaching the deepest water depth indicated by a black circle in Fig. 5, the water temperature at that time is taken as the water bottom water temperature and RA.
The maximum depth is stored in the RAM 13 at the same time. After that, when it is detected that the user has floated and reached the water surface indicated by a black mark in FIG. 5, the water temperature at that time is stored in the RAM 13 as the water surface water temperature.

After that, when the start / stop key 7 is pressed to stop the measurement (step S
8), the CPU 11 stops the measurement process and
The maximum water depth, the water bottom water temperature and the water surface water temperature are read out from the AM 13, and are output together with the drive signal to the display unit 5, and as shown in FIG. 6, the water surface water depth and water temperature and the water bottom water depth and water temperature are displayed and output (step S9). .. In FIG. 6, the current time is also displayed at the same time.

The measurement data such as the water temperature data and the water depth data thus stored in the RAM 13 are connected to an external device such as a personal computer by connecting a cord to a connector provided in the temperature measuring device 1. , Can be transferred, and the measured data can be effectively used.

In this way, the diver is
Just by pressing the start / stop key 7 and then pressing the start / stop key 7 again at the end of the dive, the diver remembers the water bottom water temperature and the water surface water temperature by looking at the water temperature gauge and records it in a memo as in the past. Instead, the deepest water temperature (water bottom water temperature) and the water surface water temperature can be automatically stored in the RAM 13, and the water bottom water temperature and the water surface water temperature stored in the RAM 13 can be displayed and output on the display unit 5. .. As a result, the work of remembering and recording the water bottom water temperature and the water surface temperature can be omitted, the workability of diving can be improved, and the enjoyment of diving can be increased.

Further, the water surface water temperature is not measured immediately after diving, but is measured when the surface of the water surface is raised after diving, so that the water surface water temperature can be measured when the temperature sensor 4 is stable. , Can measure accurate water surface temperature.

7 and 8 are views showing another embodiment of the present invention. In this embodiment, the water temperature is detected at every predetermined water depth, and is applied to the temperature measuring device 1 similar to the above embodiment. Therefore, in explaining the present embodiment,
The same components as those in the above embodiment are designated by the same reference numerals, and the description thereof will be omitted.

In FIG. 7, the temperature measuring device 20 is equipped with a pressure sensor 21, and the pressure sensor 21 constantly detects the pressure when the start / stop key 7 is pressed, and the A / D conversion circuit 17 is provided. Output to. Similarly to the above, the A / D conversion circuit 17 converts the analog pressure data input from the pressure sensor 21 into digital data, and the CPU 2
Output to 2.

Similar to the above, various programs are stored in the ROM 23, but in particular, a water temperature detection processing program for detecting the water temperature at each predetermined water depth in this embodiment is stored.

The CPU 22 controls each part of the temperature measuring device 20 in accordance with the program stored in the ROM 23, and performs the process as the temperature measuring device 20, in particular, the water temperature detecting process at every predetermined water depth. That is, the CPU 22 uses the pressure sensor 2
Calculate the water depth based on the pressure data input from 1,
The measurement signal b is output to the temperature sensor 4 at every constant water depth to cause the temperature sensor 4 to detect the water temperature.

The time counting circuit 24, like the above,
It is provided with a minute and second counter, counts the clock signal input from the frequency dividing circuit 15, and generates time data of hour, minute, and second. However, the time counting circuit 24 does not output the carry signal a to the CPU 11 at regular time intervals, for example, every second, unlike the time counting circuit 16 of the above embodiment.

Next, the operation will be described with reference to the flowchart of FIG. Also in the temperature measuring device 20 of this embodiment, when the start / stop key 7 is pressed, first,
Initialization processing is performed to clear the RAM 13 and the like (step P1). When the initialization process is completed,
It is checked whether or not it is the output timing of the measurement signal b for each constant water depth (step P2), and when the output timing of the measurement signal b for each constant water depth is reached, the measurement signal b for detecting the water temperature is output to the temperature sensor 4, The water temperature and the water depth are measured (step P3).

When the water temperature and the water depth are measured, the measured water depth is compared with the maximum water depth of the RAM 13 to check whether the current water depth is the maximum water depth (step P4), as in the above embodiment. When the maximum water depth is reached, the water temperature measured this time is written in the RAM 13 as the water bottom water temperature, and the water depth measured this time is also written in the RAM 13 as the maximum water depth (step P5) to determine whether the maximum water depth is 0 and the current water depth is 0. Check (step P6). At this time, the water surface temperature is not set to the water temperature at the start of diving. If there is a temperature difference between the temperature near the water surface and the water temperature, it takes time for the temperature sensor equilibrated to the temperature on land to equilibrate to the water temperature. Therefore, it is expected that the measured temperature at the start of diving will have a large error,
The water temperature at the end of the dive is the water surface temperature. If the water temperature near the water surface is the same as the water temperature, the temperature sensor maintains equilibrium even in water, so no error will occur.Therefore, the water temperature at the start of diving may be the water surface temperature. There are two kinds of processing processes when there is no. Generally, there are many differences in temperature. Therefore, the treatment process will be shortened if the water temperature at the end of the dive is set to the water surface temperature.
Accurate water surface temperature can be measured. In step P4,
If it is not the maximum water depth, the process proceeds to step P6, and after diving once, it is checked whether or not it has risen to the water surface. If it has not risen to the surface of the water after the dive, the process directly proceeds to step P8.

In step P8, it is checked whether or not the start / stop key 8 has been pressed, and the start / stop key 8 is pressed.
When the stop key 8 is not pressed, it is determined that the measurement is not completed yet, the process returns to step P2, and the same process is repeated.

When the start / stop key 8 is pressed in step P8, as shown in FIG. 6, the water bottom water temperature, the water surface water temperature, the water surface water depth and the water bottom water depth stored in the RAM 13 are displayed and output, and the processing is ended. (Step P9).

Therefore, it is possible to always detect the water depth and to detect the water temperature at every constant water depth. As a result, the deepest water temperature (water bottom water temperature) and the water surface water temperature can be measured and stored more reliably.

In each of the above embodiments, the water bottom water temperature and the water surface water temperature are stored in the RAM 13, but the present invention is not limited to this, and the water temperature at each predetermined water depth is detected and stored in the RAM 13. You may do it. By doing so, more detailed water temperature data can be obtained.

[0044]

According to the first aspect of the present invention, since the deepest deep water temperature (water bottom water temperature) and the water surface water temperature can be automatically stored in diving, the diver can adjust the water bottom water temperature and It is possible to omit the work of remembering the water surface temperature one by one by looking at the water thermometer and recording it in a memo, and it is possible to improve the workability of diving work,
It can also improve the fun of diving. In addition, the water surface temperature is not measured immediately after the dive, but is measured when the surface of the water surface is raised after diving, so that the water surface temperature can be measured when the water temperature detecting means is stable, The water surface temperature can be measured. At this time,
The reason why the water surface temperature is not the water temperature at the start of diving is that if there is a temperature difference between the water temperature near the water surface and the water temperature, it will take some time for the water temperature detecting means that is in equilibrium with the land temperature to equilibrate with the water temperature. For this reason, the measured temperature at the start of the dive is expected to have a large error, so the water temperature at the end of the dive is the surface water temperature. If the water temperature near the water surface and the water temperature are the same, no error will occur because the water temperature detection means maintains equilibrium even in water.Therefore, the water temperature at the start of diving may be the water surface temperature, but if there is a temperature difference It requires two types of processing processes when there is no difference.
Generally, there are many differences in temperature. Therefore, if the water temperature at the end of diving is set to the water surface temperature, the treatment process is shortened and the water surface temperature can be accurately measured.

According to the second aspect of the present invention, the water depth detecting means always detects the water depth, and the water temperature detecting means detects the water temperature every time the water depth detecting means detects a predetermined water depth. Therefore, it is possible to reliably detect and store the deepest deep water temperature and the surface water temperature.

According to the third aspect of the present invention, since the water depth detecting means and the water temperature detecting means detect the water depth and the water temperature at every predetermined time interval, the deepest water temperature and the deepest water temperature are not affected by the diving time. The water surface temperature can be detected and stored.

According to the fourth aspect of the present invention, the water temperature storage means stores the deepest water depth water temperature and the surface water temperature, and also stores the water temperature for each predetermined water depth as the water depth becomes shallower. The water temperature for each water depth can be stored, and more detailed water temperature data can be automatically obtained.

According to the fifth aspect of the present invention, since each water temperature stored in the water temperature storage means is displayed and output to the display output means, the necessary water temperature data can be promptly confirmed during the diving or after the diving is completed. be able to.

[Brief description of drawings]

FIG. 1 is an external view of a temperature measuring device according to an embodiment of the present invention.

FIG. 2 is a block configuration diagram of a temperature measuring device according to an embodiment of the present invention.

FIG. 3 is a diagram showing a memory map of the RAM shown in FIG.

FIG. 4 is a flowchart of measurement processing by the temperature measurement device according to the embodiment of the present invention.

FIG. 5 is an operation explanatory view of measurement processing.

FIG. 6 is a diagram showing an example of a display unit that displays measurement results.

FIG. 7 is a block configuration diagram of a temperature measuring device according to another embodiment of the present invention.

FIG. 8 is a flowchart of a measurement process performed by the temperature measuring device according to another embodiment of the present invention.

[Explanation of symbols]

 1, 20 Temperature Measuring Device 2 Body Case 3, 21 Pressure Sensor 4 Temperature Sensor 5 Display 6 Preset Key 7 Start / Stop Key 8 Band 11, 22 CPU 12, 23 ROM 13 RAM 14 Oscillation Circuit 15 Dividing Circuit 16, 24 Time counting circuit 17, 18 A / D conversion circuit 19 Switch section

Claims (5)

[Claims] 1. A water depth detecting means for detecting a water depth, a water temperature detecting means for detecting a water temperature, a water depth determining means for determining a deepest water depth and a water surface based on a detection result of the water depth detecting means, and the water depth determining means. According to the result of the determination, a water temperature storage unit that stores the deepest water depth temperature detected by the water temperature detection unit at the deepest water depth and the water surface water temperature detected by the water temperature detection unit when reaching the water surface after reaching the deepest water depth. A temperature measuring device comprising: 2. The water depth detecting means always detects the water depth, and each time the water depth detecting means detects a predetermined water depth,
The temperature measuring device according to claim 1, wherein the water temperature detecting means detects the water temperature. 3. The temperature measuring device according to claim 1, wherein the water depth detecting means and the water temperature detecting means detect the water depth and the water temperature at predetermined time intervals. 4. The water temperature storage means stores the deepest water depth, stores the water temperature for each predetermined water depth as the water depth becomes shallower, and stores the water surface water temperature when the water surface is reached. The temperature measuring device according to any one of claims 1 to 3. 5. The temperature measuring device according to claim 1, further comprising display output means for displaying and outputting each water temperature stored in the water temperature storage means.