JP2000275069A - Indicating instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately perform indication even when temperature is fluctuated by determining the temperature of a rotary internal machine according to atmospheric temperature outside the rotary internal machine, and by correcting the deflection angle of a pointer accordingly. SOLUTION: For example, the temperature of a rotary internal machine 10b of a speedometer 10 is calculated based on a characteristic line for indicating the relationship between the detection atmospheric temperature of an atmospheric temperature sensor 81 and the temperature of the rotary internal machine 10b. Then, the amount of the angle of correction of the calculation deflection angle of a pointer 10c is calculated according to the calculation deflection angle of the pointer 10c and the calculation temperature of the rotary internal machine 10b based on the curve characteristics for indicating the relationship between the amount of the angle of the correction of the deflection angle of the pointer and the deflection angle. According to the amount of the angle of the correction, the calculation deflection angle of the pointer 10c is corrected for outputting to the rotary internal machine 10b of the speedometer 10, Then, a rotary internal machine 30b deflects a pointer 30c by the rotation so that the deflection angle of the pointer 30c coincides with the correction deflection angle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indicating instrument used for vehicles, ships, general industrial equipment, and the like.

[0002]

2. Description of the Related Art Conventionally, for example, as a vehicle indicating instrument, there is a cross coil type indicating instrument disclosed in Japanese Patent Application Laid-Open No. 9-281147. In some of the indicating instruments, a temperature compensating resistor is connected to the cross coil in the rotating inner machine to compensate for the temperature of the rotating inner machine.

[0003]

However, when there are a plurality of rotating inner machines in the indicating instrument, it is necessary to provide a temperature compensating resistor for each rotating inner machine. In addition, as the number of rotating inner machines increases, it is necessary to increase the temperature compensating resistance accordingly. Further, when a stepping motor is used instead of the rotating inner machine having the cross coil as the rotating inner machine, it is difficult to compensate for the temperature by the resistance.

Accordingly, in order to cope with the above, the present invention performs temperature compensation of the rotating inner machine using the ambient temperature outside the rotating inner machine without depending on the temperature compensating resistance. It is an object of the present invention to provide an indicating instrument as described above.

[0005]

In order to achieve the above object, the indicating instrument according to the first aspect of the present invention comprises a dial (10a to 40a) and a dial provided on the back side of the dial. An internal moving machine (10b to 40b) and a tip end of a pointer shaft extending rotatably through the dial from the internal rotating machine and supported along the dial in response to the rotation of the internal rotating machine. Swinging hands (10c to 40c), ambient temperature detecting means (81, 91) for detecting an ambient temperature outside the rotary inner machine outside the rotary inner machine, and a rotating internal machine based on the detected atmospheric temperature. Temperature determining means (220, 26) for determining the temperature
0, 320, 360) and correction means (230, 270, 330, 37) for correcting the deflection angle of the pointer corresponding to the input analog amount as the correction deflection angle according to the determined temperature of the rotating inner unit.
0) and control means (240, 280, 340, 38) for controlling the internal rotating machine so that the hands swing to the corrected shake angle.
0).

As described above, the temperature of the rotating inner machine is detected by the ambient temperature detecting means outside the rotating inner machine, the temperature of the rotating inner machine is determined in accordance with the temperature detected by the atmosphere temperature sensor, and the swing angle of the pointer is set within the rotating inner machine. The correction deflection angle is corrected according to the determined temperature of the machine. Thereby, even if the temperature of the rotating inner machine fluctuates, the indicating instrument can indicate the accurate indicated value by the pointer without being affected by the fluctuation.

Here, according to the invention described in claim 2,
In the invention described in claim 1, the temperature determining means is based on a characteristic representing a relationship between a predetermined temperature of the rotating inner machine and an ambient temperature at a detection position of the ambient temperature detecting means outside the rotating inner machine. The temperature of the rotating inner machine is determined according to the detected ambient temperature of the ambient temperature detecting means. Thereby, the operation and effect of the invention described in claim 1 can be further improved.

According to a third aspect of the present invention, in the first or second aspect of the invention, the correction means calculates the correction angle amount by using a predetermined correction angle of the shake angle and the shake angle. The shake angle is corrected based on the characteristic representing the relationship with the angle, and the shake angle is corrected according to the calculated correction angle amount. This allows
The operation and effect of the invention described in claim 1 or 2 can be further improved.

According to the invention described in claim 4, in the invention described in any one of claims 1 to 3, the temperature determination means, the correction means, and the control means are the microcomputers (80, 90). The ambient temperature detecting means is a temperature sensor built in the microcomputer. As described above, since the temperature sensor built into the microcomputer is used as the temperature sensor for temperature compensation of the rotating inner machine, it is not necessary to separately provide a temperature sensor.
The operation and effect of the invention according to any one of claims 1 to 3 can be achieved.

A supporting instrument according to a fifth aspect of the present invention comprises a plurality of dials (10a to 40a) and a plurality of rotating inner units (10a to 10a) arranged on the back side of each of the dials.
b to 40b), each of which is supported by the tip of a pointer shaft that extends rotatably from each of the rotating inner machines through the corresponding dial, and is mounted on each of the dials according to the rotation of each rotating inner machine. And shake angle calculating means (210, 250, 310, 350) for calculating the shake angle of each hand corresponding to a plurality of input analog amounts.
At least one or more ambient temperature sensors (81, 91) disposed outside each of the rotary inner units for detecting the ambient temperature outside of each of the rotary inner units; and each of the rotary internal units based on the detected ambient temperature. Temperature determining means (220, 2
60, 320, and 360), correction means (230, 270, 330, and 370) for correcting each calculated deflection angle as a correction deflection angle in accordance with the determined temperature of each rotating internal machine. Control means (240, 280, 34) for controlling each rotating inner machine so as to swing each hand.
0, 380).

As described above, the temperature of each rotating inner machine is determined in accordance with the detected temperature of the ambient temperature sensor using the ambient temperature sensor located outside each rotating inner machine, and the swing angle of each pointer is adjusted each time. The deflection angle of each pointer is corrected according to the determined temperature of the moving machine. Thereby, even if the temperature of each rotating inner machine fluctuates, an accurate instruction value can be indicated by each pointer without being affected by the fluctuation.

Here, according to the invention described in claim 6,
The temperature determining means, the correcting means and the control means are constituted by at least one microcomputer (80, 90), and the atmosphere temperature sensor is a temperature sensor built in at least one of the microcomputers. It is. As described above, since the temperature sensor built in the microcomputer is used as the ambient temperature sensor, a separate temperature sensor is not used.
The effects of the invention described in (1) can be achieved.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1 and 2 show an example of a vehicle combination meter to which the present invention is applied.
The combination meter is provided on an instrument panel provided in a vehicle compartment of the vehicle.

The combination meter includes an instrument panel P
The instrument panel P is provided with a speedometer 10, a tachometer 20, a fuel gauge 30, and a temperature gauge 40, as can be seen from FIGS. As shown in FIGS. 1 and 2, the speedometer 10 includes a scale plate 10 a formed on an instrument panel P, and a rotating internal machine 10 b.
And a pointer 10c.

The inner rotary machine 10b is mounted on the upper wall of the instrument panel P at a portion corresponding to the scale plate 10a on the back surface thereof. In addition, the pointer 10c is supported at its pivot base by a tip end of a pointer shaft that extends rotatably from the rotary inner unit 10b through substantially the center of the scale plate 10a.
Accordingly, the pointer 10c swings with the rotation of the pointer shaft of the rotary inner unit 10b, and indicates the vehicle speed of the vehicle corresponding to the swing angle on the substantially arc-shaped scale portion 11 of the scale plate 10a. .

The tachometer 20 has a scale plate 20a formed on the instrument panel P as shown in FIG.
And a pointer 20c. The rotating inner unit 20b is mounted on the upper wall of the instrument panel P at a portion corresponding to the scale plate 20a on the back surface thereof. In addition, pointer 20c
At the rotation base thereof, the scale plate 2 from the rotation inner machine 20b.
It is supported by the tip of a pointer shaft that extends rotatably through the approximate center of Oa.

As a result, the pointer 20 c is
The indicator b is swung with the rotation of the pointer shaft, and the engine speed of the vehicle corresponding to the swing angle is indicated on the substantially arc-shaped scale portion 21 of the scale board 20a. The fuel gauge 30
As shown in FIG. 1, a scale plate 30 formed on the instrument panel P.
a, a rotating inner machine 30b, and a pointer 30c.

The inner rotary machine 30b is mounted on the upper wall of the instrument panel P at a portion corresponding to the graduation plate 30a on the rear surface thereof. The pointer 30c is supported at its pivot base by a tip end of a pointer shaft that extends rotatably from the rotation inner unit 30b through substantially the center of the scale plate 30a.
As a result, the pointer 30c swings with the rotation of the pointer shaft of the rotating inner unit 30b, and the amount of fuel in the fuel tank of the vehicle corresponding to the swing angle is set to the substantially arc-shaped scale portion 31 of the scale plate 30a. Instructions are displayed above.

Further, as shown in FIG. 1, the temperature gauge 40 includes a scale plate 40a formed on the instrument panel P, a rotating inner machine 40b, and a pointer 40c. Rotating inner machine 40b
As shown in FIG. 2, is mounted on the upper wall of the instrument panel P on the rear surface of the instrument panel P at a portion corresponding to the scale plate 40a. In addition, the pointer 40c is supported at the rotation base thereof at the tip of a pointer shaft that extends rotatably from the rotation inner unit 40b through substantially the center of the scale plate 40a.

As a result, the pointer 40 c is
The temperature of the cooling water in the engine cooling system of the vehicle corresponding to the swing angle is indicated on the substantially arc-shaped scale portion 41 of the scale board 40a. However, in the present embodiment, each of the rotating inner machines 10b, 20b, 30
Step motors are employed as b and 40b. Therefore, the pointer shaft of each rotating inner machine corresponds to the rotation shaft of the corresponding step motor. In addition, each rotating inner machine 10
Among the b, 20b, 30b, and 40b, the shaft intervals of both adjacent rotating inner machines are substantially equal as shown in FIG. In FIG. 1, reference numeral 50a indicates an odometer, and reference numeral 50b indicates a direction indicator.

The combination meter includes a casing 60 as shown in FIG. This casing 60 is attached to the outer periphery of the instrument panel P from the back side at the opening thereof.
Each of the rotating inner machines 10b, 20b, 30b, 40b described above
Are housed together with the printed circuit board 70. On the surface of the printed circuit board 70, each of the rotating inner machines 10b, 20
b, 30b, and 40b are fixed to the lower wall, and two microcomputers 80 and 90 are shown on the surface of the printed circuit board 70 in FIG. 3 on the direction indicator 50b side of the rotating inner machine 10b. They are arranged close to each other.

In this embodiment, the microcomputer 8
0 is used to control both the speedometer 10 and the fuel gauge 30, while the microcomputer 90 is used to control both the tachometer 20 and the temperature gauge 40. Note that these microcomputers 80 and 90 are electrically connected to the wiring section of the printed board 70.

Further, as shown in FIG. 2, the combination meter has an annular dial plate 100, and the dial plate 100 is provided at its lower end opening at the outer peripheral portion of the instrument panel P on the front side thereof. It is attached from. The front panel 1 has an opening at the upper end of the facing plate 100.
10 (see FIGS. 1 and 2). Next, the electric circuit configuration of the combination meter is shown in FIG.
This will be described with reference to FIG.

The speed sensor 120 detects the speed of the vehicle. The rotation speed sensor 130 detects the engine rotation speed of the vehicle. Fuel sensor 140 detects the amount of fuel in the fuel tank of the vehicle. Further, the water temperature sensor 150 detects the temperature of the cooling water of the engine cooling system of the vehicle. The ambient temperature sensor 81 detects the ambient temperature in the vicinity of the rotating inner unit 10b in the casing 60,
On the other hand, the ambient temperature sensor 91 detects the ambient temperature in the vicinity of the rotating inner unit 10b in the casing 60. In the present embodiment, as shown in FIG.
The ambient temperature sensor 91 is incorporated in the microcomputer 90, as shown in FIG.

The microcomputer 80 executes the first computer program according to the flowchart shown in FIG. 5, and during this execution, the atmosphere temperature sensor 8
1. Speedometer 10 and fuel gauge 30 according to the respective detection outputs of speed sensor 120 and fuel sensor 140
Is performed. The first computer program is stored in the ROM of the microcomputer 80 in advance.

On the other hand, the microcomputer 90
The computer program is executed according to the flowchart shown in FIG. 6, and during this execution, the instruction control of the tachometer 20 and the temperature gauge 40 is performed in accordance with the detection outputs of the ambient temperature sensor 91, the rotation speed sensor 130, and the water temperature sensor 150. . The second computer program includes:
It is stored in the ROM of the microcomputer 90 in advance.

The microcomputers 80, 90
Is operated by being supplied with power from a battery B via an ignition switch IG of the vehicle. In this embodiment configured as described above, both microcomputers 80, 90
Operate together by closing the ignition switch IG, the first computer program is started to be executed by the microcomputer 80 according to the flowchart of FIG. 5, and the second computer program is started to be executed by the microcomputer 90 according to the flowchart of FIG. . It is assumed that the engine of the vehicle starts when the ignition switch IG is closed, and that the vehicle is running under the start of the engine.

First, the processing of the microcomputer 80 will be described. When the execution of the first computer program is started as described above, the detection outputs of the ambient temperature sensor 81, the speed sensor 120, and the fuel sensor 140 are input to the microcomputer 80 in step 200 of FIG. Next, in step 210, the deflection angle of the pointer 10c of the speedometer 10 is calculated according to the detection output of the speed sensor 120.

Thereafter, in step 220, the temperature of the rotating inner unit 10b of the speedometer 10 is changed to the detected ambient temperature of the ambient temperature sensor 81 shown in FIG.
It is calculated based on a characteristic line L10 representing the relationship with the temperature of 0b. In the present embodiment, the characteristic line L10 is determined in consideration of the positions of the rotating inner unit 10b and the microcomputer 80 on the printed circuit board P shown in FIG. However, the characteristic line L10 is a measured value of the temperature of the rotating inner unit 10b at the position on the printed circuit board P shown in FIG. 3 and the ambient temperature sensor 81 of the microcomputer 80 at the position on the printed circuit board P shown in FIG. It has been confirmed by experiments that the relationship with the detected temperature is accurately satisfied. The characteristic line L10 is stored in advance in the ROM of the microcomputer 80 as data.

Next, in step 230, the pointer 1
The calculation of the pointer 10c in step 210 is based on a curve characteristic (refer to the symbols A to D in FIG. 9) in which the calculated deflection angle of 0c is a relationship between the deflection angle of the pointer and the deflection angle. It is calculated according to the deflection angle and the calculated temperature of the rotating inner machine 10b in step 220. here,
When the calculated temperature of the rotating inner machine 10b is -30 (° C.), 10
If it is equal to one of (C), 40 (C), and 80 (C) (the temperature corresponding to each of the curves A to D), the correction angle amount is calculated using any of the curves A to D.

The calculated temperature of the rotating inner unit 10b is -3.
When it is not equal to any of 0 (° C.), 10 (° C.), 40 (° C.), and 80 (° C.), the correction angle amount is calculated by an interpolation method using the curves A to D. In the present embodiment, the curve characteristics A to D in FIG. 9 indicate not only the deflection angle of the pointer 10 c of the speedometer 10 but also the tachometer 20.
Are used to calculate the deflection angle of the pointer 20c of the fuel gauge 30, the deflection angle of the pointer 30c of the fuel gauge 30, and the deflection angle of the pointer 40c of the temperature gauge 40.

In order to satisfy these, each of the curve characteristics A to D is obtained as a cosine wave waveform by an experiment, and is stored in the ROM of the microcomputer 80 in addition to the ROM of the microcomputer 80 in advance. When the calculation in step 230 is completed as described above, step 24 is executed.
At 0, the deflection angle of the pointer 10c calculated in step 210 is corrected as the corrected deflection angle by the correction angle amount in step 230, and is output to the rotating inner unit 10b of the speedometer 10. In this case, this correction is based on guideline 1.
This is performed by adding or subtracting a correction angle amount to or from the calculated shake angle according to the positive region or the negative region of each of the curve characteristics A to D determined by the calculated shake angle of 0c.

When the corrected deflection angle is output to the rotating inner unit 10b, the rotating inner unit 10b rotates the pointer 10c so that the deflection angle of the pointer 10c matches the corrected deflection angle. Shake 10c. When the process in step 240 is completed, in steps 250 to 280, a deflection angle correction process of the pointer 30c of the fuel gauge 30 is performed.

First, in step 250, the deflection angle of the pointer 30c of the fuel gauge 30 is calculated according to the detection output of the fuel sensor 140. Thereafter, in step 260, the temperature of the rotating inner unit 30b of the fuel gauge 30 is changed to the state shown in FIG.
(B) is calculated based on a characteristic line L30 representing the relationship between the detected ambient temperature of the ambient temperature sensor 81 and the temperature of the rotating inner machine 30b.

In the present embodiment, the characteristic line L30 is determined in consideration of the positions of the rotation inner unit 30b and the microcomputer 80 on the printed circuit board P shown in FIG. However, the characteristic line L30 is the rotation inner unit 30b at the position on the printed circuit board P shown in FIG.
It has been experimentally confirmed that the relationship between the actual measured value of the temperature and the temperature detected by the ambient temperature sensor 81 of the microcomputer 80 at the position on the printed circuit board P shown in FIG. 3 is accurately satisfied. The characteristic line L30 is stored in the microcomputer 80 as data in advance.

Next, at step 270, the pointer 3
The calculated deflection angle of the pointer 10c is calculated based on the calculated deflection angle of the pointer 30c in step 250 and the calculated temperature of the rotating inner unit 30b in step 260 based on the curve characteristics A to D. Is calculated substantially in the same manner as the correction angle amount. Then, step 280
In step 250, the deflection angle of the pointer 30 c calculated in step 250 is corrected as a corrected deflection angle by the correction angle amount in step 270, and the rotational internal unit 3 of the fuel gauge 30 is adjusted.
0b.

When the corrected swing angle is output to the rotating inner unit 30b, the rotating inner unit 30b rotates the pointer 30c so that the swing angle of the pointer 30c matches the corrected swing angle. Shake 30c. Next, the processing of the microcomputer 90 will be described. When the execution of the second computer program is started as described above, the detection outputs of the ambient temperature sensor 91, the rotation speed sensor 130, and the water temperature sensor 150 are input to the microcomputer 90 in step 300 of FIG.

Next, at step 310, the deflection angle of the pointer 20c of the tachometer 20 is calculated according to the detection output of the rotation speed sensor 130. After that, step 320
In FIG. 8, the temperature of the rotating inner machine 20b of the tachometer 20 is
(A) is calculated based on a characteristic line L20 representing the relationship between the detected ambient temperature of the ambient temperature sensor 91 and the temperature of the rotating inner machine 20b.

In the present embodiment, the characteristic line L20 is determined in consideration of the positions of the rotation inner unit 20b and the microcomputer 90 on the printed circuit board P shown in FIG. However, the characteristic line L20 is the rotation inner unit 20b at the position on the printed circuit board P shown in FIG.
It has been experimentally confirmed that the relationship between the actual measured value of the temperature and the temperature detected by the ambient temperature sensor 91 of the microcomputer 90 at the position on the printed circuit board P shown in FIG. 3 is accurately satisfied. The characteristic line L20 is stored in advance in the ROM of the microcomputer 90 as data.

Next, at step 330, the pointer 2
The correction angle amount of the calculated shake angle of 0c is calculated based on the curve characteristics A to D according to the calculated shake angle of the pointer 20c in step 310 and the calculated temperature of the rotating inner machine 20b in step 320. When the calculation in step 330 is completed as described above, in step 340, the deflection angle of the pointer 20c calculated in step 310 is adjusted as a correction deflection angle by the correction angle amount in step 330, and the rotation of the tachometer 20 is adjusted. Machine 20b.

When the corrected deflection angle is output to the rotating inner unit 20b, the rotating inner unit 20b rotates the pointer 20c so that the deflection angle of the pointer 20c matches the corrected deflection angle. 20c is shaken. When the processing in step 340 ends, in steps 350 to 380, the deflection angle correction processing of the pointer 40c of the temperature gauge 40 is performed.

First, in step 350, the deflection angle of the pointer 40c of the temperature gauge 40 is calculated according to the detection output of the water temperature sensor 150. Thereafter, in step 360, the temperature of the rotating inner unit 40b of the temperature gauge 40 is changed to the state shown in FIG.
(B) is calculated based on a characteristic line L40 representing the relationship between the detected ambient temperature of the ambient temperature sensor 91 and the temperature of the rotating inner machine 40b.

In the present embodiment, the characteristic line L40 is determined in consideration of the positions of the rotary inner unit 40b and the microcomputer 90 on the printed circuit board P shown in FIG. However, the characteristic line L40 is the rotation inner unit 40b at the position on the printed circuit board P shown in FIG.
It has been experimentally confirmed that the relationship between the actual measured value of the temperature and the temperature detected by the ambient temperature sensor 91 of the microcomputer 90 at the position on the printed circuit board P shown in FIG. 3 is accurately satisfied. The characteristic line L40 is stored in advance in the ROM of the microcomputer 90 as data.

Next, at step 370, the pointer 4
The correction angle amount of the calculated deflection angle of 0c is based on the curve characteristics A to D, and the calculated deflection angle of the pointer 10c described above in accordance with the calculated deflection angle of the pointer 40c in step 350 and the calculated temperature of the rotating inner unit 40b in step 360. Is calculated substantially in the same manner as the correction angle amount. Then, step 380
In step 350, the deflection angle of the pointer 40c calculated in step 350 is adjusted as the corrected deflection angle by the correction angle amount in step 370, and the rotation of the temperature gauge 40
0b.

When the corrected deflection angle is output to the rotating inner unit 40b, the rotating inner unit 40b rotates the pointer 40c so that the deflection angle of the pointer 40c coincides with the corrected deflection angle. 40c is shaken. As explained above,
In the present embodiment, the temperature of each of the rotating inner units 10b and 30b is measured by using the ambient temperature sensors 81 and 91 built in the microcomputers 80 and 90 located outside the rotating inner units 10b to 40b, respectively, as shown in FIG. (A) and (b) are calculated in accordance with the temperature detected by the ambient temperature sensor 81 based on the linear characteristics L10 and L30, and the swing angles of the hands 10c and 30c are calculated based on the curves A to D in FIG. 10b, 30b
The shake angle correction amount is calculated in accordance with the calculated temperature, and the shake angle of each of the hands 10c and 30c is corrected as the corrected shake angle with each of the shake angle correction amounts.

Thus, even if the temperature of each of the rotating inner machines 10b, 30b fluctuates, the speedometer 10 and the fuel gauge 30 can accurately indicate the indicated value by the hands 10c, 30c without being affected by the fluctuation. Can be instructed.
Further, since the ambient temperature sensor 81 built in the microcomputer 80 is employed as a temperature sensor for temperature compensation of the two rotating inner machines 10b, 30b,
It is not necessary to provide a temperature sensor for temperature assurance in each of b, and only one ambient temperature sensor 81 is required as a temperature sensor common to both rotating inner machines 10b and 30b.

Further, in order to correct each rotation amount of both the rotation inner units 10b and 30b based on the temperature detected by the ambient temperature sensor 81, each instruction of the speedometer 10 and the fuel gauge 30 is independent of the input signal system. Temperature compensation of the value becomes possible. Further, the temperature of each rotating inner unit 20b, 40b is calculated according to the detected temperature of the ambient temperature sensor 91 based on the linear characteristics L20, L40 in FIGS. 8A and 8B, and the deflection angles of the hands 20c, 40c. Is calculated based on the calculated temperatures of the rotating inner units 20b and 40b based on the curves A to D in FIG. 9, and the deflection angles of the hands 20c and 40c are corrected using the respective shake angle correction amounts. Correction was made as the deflection angle.

Thus, even if the temperature of each of the rotating inner machines 20b, 40b fluctuates, the tachometer 20s and the temperature gauge 40 use the respective hands 20c, 40c to provide an accurate indication value without being affected by the fluctuation. Can be instructed. Further, since the ambient temperature sensor 91 incorporated in the microcomputer 90 is adopted as a temperature sensor for guaranteeing the temperature of the two rotating inner machines 20b, 40b, the both rotating inner machines 20b, 40b
It is not necessary to provide a temperature sensor for temperature assurance in each of the rotating internal machines 20b and 40b, and only one ambient temperature sensor 91 is required as a temperature sensor common to both the rotating inner machines 20b and 40b.

In addition, since the respective rotation amounts of the two rotation inner units 20b and 40b are corrected based on the temperature detected by the ambient temperature sensor 91, the respective indications of the tachometer 20 and the temperature gauge 40 are independent of the input signal system. Temperature compensation of the value becomes possible. FIG. 10 shows a modification of the above embodiment. In this modification, the microcomputer 80 is modified so as to also perform the processing of the microcomputer 90 described in the above embodiment.

For this reason, R of the microcomputer 80
The OM also stores in advance the second computer program executed according to the flowchart of FIG. 6 and the data of FIGS. 8A and 8B. Accordingly, the microcomputer 90 has been abolished. Also, the microcomputer 80 is connected to the fuel sensor 140 and the water temperature sensor 150, and
Are also connected to each of the rotating inner machines 20b and 40b.

As a result, the processing performed by both microcomputers 80 and 90 in the above embodiment is performed only by microcomputer 80. As a result, in the above embodiment, both microcomputers 8
The functions and effects achieved by the processes 0 and 90 can be achieved by the process of the microcomputer 80 alone. in this case,
The ambient temperature sensor 81 is used for all the rotating inner machines 10b to 4
Since it is commonly used as the temperature sensor for temperature assurance of 0b, the number of temperature sensors for temperature assurance can be further reduced as compared with the above embodiment.

In practicing the present invention, unlike the above-described embodiment, the microcomputer 90 controls each rotating inner machine of the speedometer 10 and the fuel gauge 30, and the microcomputer 80 controls the tachometer 20 and the temperature gauge 40. May be controlled. Further, in practicing the present invention, the positions of the microcomputers 80 and 90 on the printed circuit board 70 are not limited to the positions described in the above embodiment, and may be appropriately changed as necessary.

In practicing the present invention, the atmosphere temperature sensors 81 and 91 include the microcomputer 8
A temperature sensor may be separately employed without being limited to the one built in 0 and 90. Further, in implementing the present invention, the number of instruments controlled by the microcomputer 80 or 90 may be increased or decreased.

In implementing the present invention, the instruments controlled by the microcomputer 80 or 90 are not limited to those described in the above embodiment, but may be changed as appropriate. In the implementation of the present invention, the rotating inner machine described in the above embodiment is not limited to the stepping motor, and may be various kinds of rotating inner machines such as a cross coil type rotating inner machine. A similar effect can be achieved.

Further, in carrying out the present invention, not only a combination meter for a vehicle but also various instruments for a vehicle,
The present invention may be applied to an instrument for industrial equipment and the like.

[Brief description of the drawings]

FIG. 1 is a front view of a vehicle combination meter according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is a plan view of a printed circuit board on which each rotating internal device and each microcomputer are arranged.

FIG. 4 is a block diagram for controlling each rotating inner machine of FIG. 1;

FIG. 5 is a flowchart showing the operation of the microcomputer 80 of FIG.

FIG. 6 is a flowchart showing the operation of the microcomputer 90 of FIG.

FIG. 7A is a graph showing the relationship between the temperature of the rotating inner machine 10b and the temperature detected by the ambient temperature sensor 81;
(B) shows the temperature of the rotating inner unit 30b and the ambient temperature sensor 8;
4 is a graph showing a relationship between the temperature of the first embodiment and the detected temperature.

FIG. 8A is a graph showing the relationship between the temperature of the rotating inner unit 20b and the temperature detected by the ambient temperature sensor 91;
(B) shows the temperature of the rotating inner unit 40b and the ambient temperature sensor 9;
4 is a graph showing a relationship between the temperature of the first embodiment and the detected temperature.

FIG. 9 is a graph showing the relationship between the amount of correction of the deflection angle of each pointer and each deflection angle, using the temperature of each rotating inner unit as a parameter.

FIG. 10 is a block diagram showing a modification of the embodiment.

[Explanation of symbols]

Reference Signs List 10: speedometer, 20: tachometer, 30: fuel gauge, 40: temperature gauge, 10b to 40b: rotating inner machine, 10c to 40c: pointer, 80, 90: microcomputer, 81, 91: atmosphere temperature sensor, 120 …
Speed sensor, 130: rotational speed sensor, 140: fuel sensor, 150: water temperature sensor.

Claims (6)

[Claims] 1. A dial (10a to 40a), a rotating inner machine (10b to 40b) disposed on the back side of the dial, and a rotatable through the dial from the rotating inner machine. A pointer (10c to 40c) supported by the tip of the extending pointer shaft and swinging on the dial in response to the rotation of the rotary inner machine
c) ambient temperature detecting means (81, 91) for detecting an ambient temperature outside the rotary inner machine outside the rotary inner machine.
Temperature determining means (220, 260, 320, 360) for determining the temperature of the rotating inner machine based on the detected ambient temperature.
Correction means (230, 270, 330, 370) for correcting the deflection angle of the pointer corresponding to the input analog amount as a correction deflection angle according to the determined temperature of the rotating inner unit; Control means (240, 280, 340,
380). 2. The method according to claim 1, wherein the temperature determining means is configured to determine a relationship between a predetermined temperature of the rotating inner unit and an ambient temperature at a detection position of the ambient temperature detecting unit outside the rotating inner unit. The indicating instrument according to claim 1, wherein the temperature of the rotating inner unit is determined according to the detected ambient temperature of the ambient temperature detecting means. 3. The correction means calculates the correction angle amount based on a characteristic representing a relationship between a predetermined correction angle amount of the shake angle and the shake angle, and calculates the correction of the shake angle. The indicating instrument according to claim 1, wherein the measurement is performed in accordance with a correction angle amount. 4. The temperature determination means, the correction means and the control means are constituted by microcomputers (80, 90), and the atmosphere temperature detection means is a temperature sensor built in the microcomputer. The indicating instrument according to any one of claims 1 to 3. 5. A plurality of dials (10a to 40a), respective inner rotating machines (10b to 40b) arranged on the back side of each of the dials, and a corresponding one of the respective inner rotating machines. Hands (10c to 40c), each supported by the tip of each hand shaft extending rotatably through the dial and swinging on each of the dials in response to the rotation of the rotary inner machine, Deflection angle calculation means (210, 250, 310, 3) for calculating a deflection angle of each of the hands corresponding to a plurality of input analog amounts.
50), at least one or more ambient temperature sensors (81, 91) disposed outside each of the rotary inner units to detect an ambient temperature outside each of the rotary inner units, and based on the detected ambient temperature. Temperature determining means (220, 260, 320, 36) for determining the temperature of each rotating inner machine.
0), and correcting means (230, 230) for correcting each of the calculated deflection angles as a correction deflection angle in accordance with the determined temperature of each of the rotating inner units.
270, 330, 370) and control means (24) for controlling each of the rotating inner machines so that each of the corresponding hands is shaken up to each of the corrected shake angles.
0, 280, 340, 380). 6. The temperature determination means, the correction means, and the control means comprise at least one microcomputer (80,
90. The indicating instrument according to claim 5, wherein the ambient temperature sensor is a temperature sensor built in at least one of the microcomputers.