JPS6064514A - Voice monitor device - Google Patents

Abstract

PURPOSE:To allow an alarm sound to reach the operator surely by increasing the amplification factor of a sound alarm signal obtained from a voice synthesizer so as to output a large sound when the noise of an engine or the like is large. CONSTITUTION:The increase in number of revolutions of an engine 15d which leads to the increase of noise is detected by a revolution sensor 16d and an output of the sensor 16d is fed to a terminal IN2 of a CPU7d. The CPU7d controls a motor 14d so as to drive it in a direction by which a resistance value of a variable resisto Rx is increased. Since a voice message outputted from a voice synthesis board 1d is fed to an amplifier 5d while being not so much attenuated, an output overcoming the noise is transmitted from a speaker 4d.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a voice monitoring device for providing good news, guidance, and instructions using sounds such as voices in agricultural machinery, construction machinery, or the like.

In recent years, with the development of semiconductor technology, devices have been devised that transmit information through verbal audio instead of panel displays. However, since sound warning, guidance, and instruction devices emit a sound at a set volume, the noise from engines and working equipment is extremely loud during work, such as with agricultural and construction machinery. When an audio information transmission device is applied to a device that is used in a relatively quiet environment when not working, it may be difficult to hear the information due to noise while working, and conversely, when not working or when the engine is stopped, the volume may be too loud. is too large and may cause problems such as being very noisy.

Therefore, the present invention aims to adjust the volume for warnings, guidance, and instructions to the engine sound of working equipment such as agricultural machinery and construction machinery, that is, whether the engine is operating or not, and the working root sound, that is, whether the working equipment is operating. To provide a voice monitoring device which detects the presence or absence of an operator and changes the volume accordingly, and always transmits information to an operator at an appropriate volume, thereby eliminating the above-mentioned drawbacks.

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the voice monitor device includes a voice synthesis board la, a selection switch 2m, and a volume change circuit section 3! L
1 speaker 4a, a power supply/engine rotation detection section 6a, and switches 19a to 21a.

Semiconductor circuits such as speech synthesis board 1A LSI etc.
When a predetermined switch among the selection switches 2a is turned on, audio information corresponding to the selection is synthesized and output at a predetermined level. Volume change circuit section 3 &amplifier 5a, resistor R
Fishing~Rs, no” R+a, relay 9&, diode 1
From 0a to si, operating state of relay 9a, switch 19a
The voice output of the voice synthesis board is amplified at an amplification rate according to the open/closed state of ~20&, and the voice information is output from the speaker 4a.

The power supply/engine rotation detection unit 6a is composed of a generator 15a driven by the engine and a regulator 12a including a regulator circuit 14a. When the engine is in operation, the regulator 12& stabilizes the output voltage of the generator 15m. Power is supplied to each load of agricultural machinery and construction machinery via the heater 18a.

At this time, the contact 13a of the regulator 12a is in an open state, the terminal is disconnected from the ground, and the relay 9& is not energized. On the other hand, when the engine is stopped, the output of the regulator 12a becomes zero, and the output of the main switch 17
When & is closed, each load is supplied with power from the battery 16a. At this time, the contact 13& of the regulator 12a is closed and the L terminal is at ground potential, and the 12v'rrL source is connected to the relay 9a.

Current flows through the diode 10a and the terminal, energizing the relay 98, closing the contacts 8&, and turning on the lamp l.
la lights up to notify the operator that power is being supplied to each load from the battery.

Among agricultural machinery and construction machinery, for example, in the cab of a combine harvester, as shown in Fig. 2, a threshing clutch switch A-2 is installed.
2. Reaping and switching lever 23, main transmission lever 24
The levers 22 and 23 are provided with switches 19m and 19m shown in FIG.
20m is provided. Further, the main transmission lever 24 is a driver's seat of the main transmission combine, 17 is the main switch shown in FIG. 1, and 25 is a board.

Next, the effects of this embodiment will be specifically explained.

Before starting work after the engine has stopped, the threshing rack, gear, and reaping latch line must be disconnected.Also, since the main transmission is in neutral, switches 19 & ~ 211 must be on and as described above. Since relay 9a is energized, contacts 8& are closed. Therefore, the resistors Ru to R14 are connected in parallel to the resistor R, and the resistance value between the point A and the ground is the minimum, and the amplification rate of the volume change circuit section 3m is the lowest.

Therefore, the audio information is output from the speaker 4a at the lowest volume.

Next, when the engine is started, the generator 15m generates an output voltage that is disconnected from the ground potential as described above at the L terminal of the regulator 12.

As a result, the relay 9a is de-energized, its contact 8a opens, and the resistance value between point A and ground becomes larger than when the engine is stopped. Therefore, the amplification rate of the volume change circuit section 3a is large, and the volume of the audio information increases in response to the increase in noise caused by starting the engine.

Next, when the first reaping operation, the threshing operation, and the threshing operation are turned on, the switches 19a to 20a are turned off.

(The resistance value between point A and the ground is large), the amplification rate of the volume change circuit section becomes large, so the volume of the audio information further increases.

Next, move the main transmission forward from the neutral state to FlyF1.
, when starting RK switching driving in either of the reverse R states,
Switch 21a is turned off, and the resistance value between point h and ground further increases. As a result, the volume change detection circuit section 3&
The amplification rate becomes large, and the volume of the audio information also reaches its maximum in response to the increase in noise that accompanies the start of travel.

As explained above, in the device of this embodiment, it is possible to detect whether or not each noise factor is in operation, such as engine operation, reaping, threshing, running of a combine harvester, etc., and to respond to an increase in the noise factor by providing voice information. Since the volume is increased in stages, the operator can hear audio information at an appropriate volume even during noisy work. Furthermore, since the configuration is such that the presence or absence of engine rotation is detected by a change in the state of the L terminal of the regulator, there is no need to separately provide a sensor for determining the presence or absence of engine rotation, and the configuration can be made at low cost.

In the embodiment shown in FIG. 1, the volume was changed in stages according to the operating conditions of the engine, reaping latch, threshing rack, gearbox, and main transmission, but as shown in FIG.
The volume may be changed in two stages depending on whether the engine is running or not.

That is, in FIG. 3, lb, 2b, 4b, 6b, ll
b, 16b, 17b, and 18b are respectively the same as those shown in FIG. 1, such as a cyanide synthesis board, a selection switch, a speaker, a power source/engine rotation detection section, a lamp, a battery, a main switch, and a fuse. 3b is the volume change circuit section in this embodiment, 5b, 9b, 8b, 10b
are an amplifier, a relay, a relay contact, and a diode similar to those shown in FIG. 1, and 7b is a low-pass filter for smoothing the audio output of the audio synthesis board 1b.

Next, the operation of the second embodiment will be specifically explained.

If the amplifier / is stopped, similar to the one in Figure 1,
Since the L terminal of regulator 12b is at ground potential,
Relay 9b is energized and its contacts 8b are closed. Therefore, since the resistor R, is connected in parallel with the resistor R, the amplification rate of the volume change circuit section 3b is low, and the amplification rate of the loudspeaker 4b is low.
The volume of audio information output from is also low. When the engine starts, the L terminal of the regulator 12b is disconnected from the ground, as in the case of FIG. 1, the relay 9b is deenergized, and its contact 8b is opened. For this reason\Foreground change circuit section 3
The amplification rate b is greater than when the engine is stopped, and the volume of the audio information output from the speaker 4b increases in response to the increase in noise accompanying the engine startup.

Next, a third embodiment of the voice monitoring device of the present invention will be described.

As shown in the functional block diagram of FIG. 4, the voice monitoring device of the third embodiment is comprised of an audio information generating section IC, a volume changing circuit section 2C, a microcomputer 3e, and a rotation speed sensor 4c.

Blocks 3C-1 to 3C-4 in the microcomputer 3C are block diagrams showing the functions achieved by the microcomputer using software.
Read the engine speed from C) and determine the volume corresponding to the engine speed (block 3cm1). Next, compare the volume determined by Pro 3C-1 and the volume tweed noise (rough signal) from the volume change circuit 2C.
3e-3) Generates a drive signal for the volume adjustment motor provided in the volume change circuit section 2C so that the volume becomes the optimal volume corresponding to the engine rotational speed signal (block 3cm).
4).

Next, the specific parts of the voice monitoring device of this embodiment are as shown in FIG.
It consists of a microcomputer 7d and an engine rotation detector 16d. The voice synthesis board ld, selection switch 2d, and speaker 4d are the same as those shown in FIG. Volume change circuit section 3di; t, amplifier 5d similar to the one in FIG. RX
The resistance value of the volume changing circuit section 3d is continuously changed, and the amplification rate of the volume changing circuit section 3d is continuously changed. The engine rotation detector 16d is, for example, a rotary reed switch type sensor or a tacho generator, and generates a pulse proportional to the rotation speed of the engine 15d.

The microcomputer 7d has pulse signal input terminals INI, IN2,
An analog signal input terminal AINI and motor drive output terminals 0UTI and 0UT2 are provided, the pulse signal input terminal INI is connected to the engine rotation detector 16d, and the pulse signal input terminal IN2 is connected to the selection switch 2d via an OR circuit 13d. , the analog signal input terminal AINI is connected to point A of the sound scene changing circuit section 3d. Further, the motor drive output terminals 0UTI and 0UT2 are connected to the forward rotation terminal and reverse rotation terminal of the motor 14d, respectively. In addition, V in Figure 5
ce is the power supply, and GND is the ground.

Next, the operation of the third embodiment will be specifically explained using the flowchart shown in FIG.

When one of the selection switches 2d in FIG. 5 is turned on, a signal is applied to the input terminal INI of the microcomputer 7d via the OR circuit 13d, and the microcomputer 7C executes the volume adjustment routine shown in chart 70 in FIG. .

First, the microcomputer 7d counts the engine rotation pulse signal per unit time applied to the pulse signal input terminal IN2,
Calculate the engine rotation speed n (step 5-1). Next, the potential at point A applied to the anaphro signal input terminal AlN2 is read and converted into a digital signal (Step 5-2).

Next, the microcomputer 7d determines the optimum volume corresponding to the engine speed according to the formula an+b (a, b are coefficients, n is the engine speed), and uses this value and the analog flow signal input terminal A I
The potential at point A of the volume change circuit section read from N1 is compared (step 5-3, step 5-4). And A
If the potential Va at the point is smaller than the value calculated using the formula a, a signal to drive the motor 4d is generated from the output terminal 0'VT1, and the value of the variable resistor RX is increased (steps 5-5). 6). Furthermore, if the potential Va at point A is larger than the value calculated using the formula a n -8). Then, when the potential VA at the point A becomes equal to the value calculated by the formula a n + b, both the output terminals 0UTI and 0UT2 are set to zero and the drive of the motor is stopped (steps 5-7). Since the amplification rate of the sound 1 changing circuit section 3d is proportional to the potential at point A, the potential at point A is
By controlling the volume to be equal to the value calculated by +b, the volume of the audio information output from the speaker 4d increases in proportion to the engine speed as shown in FIG. Audio information can be clearly heard despite the increase in noise caused by increased engine rotation.

In the above embodiment, the output terminals 0UTI and 0UT2 are both set to zero when the potential at point A of the volume change circuit section 3d becomes equal to the value calculated by the formula a n +b. , the potential vA at point A and the formula i n+
When the absolute value of the difference from the value calculated in b is much smaller than the predetermined value C, that is, when IVA-(an+b)I≦C, both output terminals 0UTI and 0UT2 are set to zero. may be configured.

In addition, in this embodiment, the motor is controlled by a microcomputer, but it is not necessarily necessary to use a microcomputer, and the function program in the microcomputer shown in the functional block diagram of Fig. 4 has the same function as that. It may be replaced with an electronic circuit that performs the following functions.

As explained above, the present invention detects the operating state of the engine in agricultural machinery, construction machinery, etc., that is, whether the engine is operating or not, and detects the operating state of the working machine in a stepwise or continuous manner. Since the system is configured to change the volume of the audio information automatically, the volume of the audio information increases in response to the increase in noise around the machine, allowing the operator to always listen to the audio information at an appropriate volume. , it is possible to prevent accidents caused by misrecognition of audio information.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention, and FIG.
A circuit configuration diagram of the embodiment, FIG. 2 is a diagram showing the cab of the combine harvester of the first embodiment, FIG. 3 is a circuit diagram of the second embodiment of the present invention, and FIG. 4 is a diagram of the third embodiment of the present invention. A functional block diagram showing the configuration of the example, Fig. 5 is a hardware configuration diagram of the third embodiment, Fig. 6 is a flowchart of the microcomputer of the third embodiment, and Fig. 7 is the engine speed and volume of the third embodiment. FIG. la, lb, ld...speech synthesis board, 2a,
2b, 2d...selection switch, 3a. 3b, 3d...Volume change circuit section, 4a, 4b,
4d...Speaker, 5a, 5b, 5d...Amplifier, 6a, 6b...Power supply and engine rotation detection section,
7b...filter, 7d'=-v icon, 8
a, 8 b, 8 d--Relay contact, 9
a, 9 b-relay, l. & , 10 b...diode, lla, 1
1b... Rump', 12m, 12b... Regulator, 13a, 13b... Regulator internal contact, 13d... OR circuit, 14a. 14b...regulator internal contact, 14d...motor, 15a, 15b...generator, 15d...
Ange y, 16a, 16b...Battery, 16
d... Engine rotation detector, 17m, 17b - Main switch, 18m, 18b... Hughes applicant Mitsubishi Agricultural Machinery Co., Ltd. Figure 2 2 et al. 1■-■＾＝ antenb a, b・Teamaki

Claims (1)

[Claims] (1) Voice monitoring devices for agricultural and construction machinery include on-board synthesis means that synthesizes voice information such as warnings, guidance, instructions, etc., and detects the operating status of devices such as engines and sets the volume accordingly. The volume setting means includes a volume setting means, a volume changing means for amplifying the audio information at an amplification rate corresponding to the setting of the volume setting means, and a speaker for outputting an output signal of the volume changing means as an audio signal. A voice monitoring device characterized in that the setting means sets an appropriate volume for a noise level based on sensing of the operating state of a device such as an engine, and adjusts an amplification rate of a volume change stage.