JPH04110021U - automatic volume control device - Google Patents

Abstract

(57) [Summary] [Purpose] To automatically control the volume without being subject to development restrictions or increasing costs. [Configuration] A detection signal is output to the microcomputer 3 when the brake switch 1 is turned on or off by operating the foot brake or parking brake. The microcomputer 3 monitors the detection signal and outputs a control signal to the electronic volume 5 after a predetermined period of time has elapsed since the detection, thereby controlling the volume to automatically lower or raise the volume.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is an automatic system that automatically controls the volume of in-vehicle audio equipment according to the surrounding conditions. The present invention relates to a volume control device.

0002

[Conventional technology]

Car stereos, car radios, and CD players used as in-vehicle audio equipment When playing music, the amount of noise from the surroundings will vary depending on the driving conditions of the car. Therefore, it is necessary to control the volume accordingly. For this reason, the auto volume This auto volume can be activated depending on the surrounding situation. Therefore, the volume is automatically controlled.

0003 Figure 4 shows an example of the configuration of a conventional auto volume (automatic volume control device). , sending a speed signal S from a speed detection circuit 15 that detects the speed of the vehicle to a control circuit 16; The electronic volume 17 is controlled by the control circuit 16 according to the speed signal S, and the speed The volume output from the speaker 18 is automatically controlled.

0004 Figure 5 shows another conventional configuration example, in which the amount of surrounding noise is measured using a microphone. After the noise signal N is detected by the amplifier 19 and amplified by the amplifier 20, the noise signal N is detected by the amplifier 20. The electronic volume 17 is controlled by the control circuit 16 in accordance with N, and the speaker 1 The volume output from 8 is automatically controlled.

[0005]

[Problem that the idea aims to solve]

However, each of the conventional automatic volume control devices has the following problems. First, the former In this configuration, when installing the function to detect the speed of the car, the audio equipment manufacturer must It is impossible to develop and design the vehicle directly, and joint development with the vehicle manufacturer is required. There is a constraint that Second, the latter configuration requires additional use of the microphone. Therefore, an increase in costs becomes unavoidable.

[0006] This invention was created in response to the above problems, and is subject to development constraints. It is possible to automatically control the volume without any trouble or increase in cost. The purpose of this invention is to provide an automatic volume control device that can perform the following functions.

[0007]

[Means to solve the problem]

In order to achieve the above purpose, the present invention adjusts the volume of in-vehicle audio equipment according to the surrounding conditions. The automatic volume control device automatically controls the volume when the brake switch is turned on or detects the output signal when turned off and changes the volume after a predetermined period of time. The invention is characterized in that it is equipped with a control means that operates in accordance with the present invention.

[0008]

[Effect]

The brake switch can be activated by operating the foot brake or parking brake. Detect the output signal when the switch is turned on or off. And this output signal detection When operating the rear foot brake, the When the key is operated, a control operation is performed to quickly change the volume. to this Since the volume can be controlled using the existing brake switch, it is possible to Automated volume control without restrictions on production or increased costs It can be done.

[0009]

【Example】

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

0010 FIG. 1 is a block diagram showing an embodiment of the automatic volume control device of the present invention. Turn on by operating the foot brake or parking brake with the switch Or turn it off. 2 is a transistor that responds to the on/off of brake switch 1, Outputs a digital signal of L (low level) signal or H (high level) signal. Send to icon (microcomputer) 3. This microcomputer 3 is installed in the operation section 4. When auto volume switch 4A is turned on, the transistor 2, the electronic volume 5 is operated after a predetermined period of time has elapsed. control to automatically change the volume output from the speaker 7 via the amplifier 6. to become The specified time is when the foot brake is operated and when the parking brake is operated. Unlike when the foot brake is operated, microcontroller 3 The electronic volume 5 is operated after a certain period of time, for example 5 seconds, after the signal is detected. control, and when the parking brake is operated, immediately after detecting the signal, e.g. After seconds have elapsed, the electronic volume 5 is controlled to operate.

[0011] 8 is an antenna, 9 is a CD player part, 10 is a radio part, 11 is a microcontroller 3 A switching switch for switching modes between the CD player section 9 and the radio section 10, which are controlled by 12 is a CD player section 9 and a radio section 10 controlled by the microcomputer 3. This is an audio selector switch that changes the output. Note that the operation section 4 has a mode A changeover switch 4B is provided.

0012 Next, the operation of this embodiment will be explained. First, the figure shows an example of operating the foot brake. This will be explained with reference to 2. Brake switch by operating the foot brake 1 turns on and off, and a detection signal like A is sent to the microcomputer 3 via transistor 2. Added. Microcomputer 3 monitors this detection signal and indicates that the on signal is on for a certain period of time, e.g. For example, if it continues for 5 seconds or more, a control signal is output to the electronic volume 5. This is it Then, the electronic volume 5 immediately performs an operation to lower the volume, and as shown in example B. For example, after two seconds, the previous volume is lowered by, for example, 6 (dB).

[0013] Next, when the off signal continues for a certain period of time, for example 5 seconds or more, the microcontroller 3 For example, raise the volume by 6 (dB) for the electronic volume 5 and return it to the original volume. Outputs a control signal such as This turns the footbrake on and off. In some cases, the volume is automatically lowered or raised after a certain period of time. be exposed.

[0014] Next, an example of operating the parking brake will be described with reference to FIG. 3. this In this case, considering the characteristics of the parking brake, the microcomputer 3 detects that the detection signal A is turned on. Then, a control signal is immediately output to the electronic volume 5. This allows the electronic volume to System 5 immediately performs an action to lower the volume, and then, for example, after 2 seconds, as shown in B. The previous volume is lowered by, for example, 6 (dB). Conversely, when detection signal A turns off The microcomputer 3 immediately outputs a control signal to the electronic volume 5 to adjust the volume to, for example, 6 ( dB) and return it to its original size. This will turn on the parking brake. , controls that automatically lower or raise the volume as soon as you turn it off. will be carried out.

[0015] In this way, according to this embodiment, by using the existing brake switch, , when operating the foot brake or parking brake, turn off the brake switch. The volume can be automatically controlled after a predetermined period of time by detecting the output signal from the Wear. Therefore, it is no longer subject to the constraint that requires joint development with vehicle manufacturers as in the past. You can also implement the auto volume function without having to prepare a new microphone. can be expressed. When operating the electronic volume after detecting the signal shown in the text The intervals and volume levels are just examples, and you can set any values depending on the purpose, use, etc. can be determined.

[0016]

[Effect of the idea]

As mentioned above, according to the present invention, the existing brake switch can be used and Since the volume is automatically controlled based on the output signal from the Automatically control volume without being affected by noise or increasing costs. I can.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of an automatic volume control device of the present invention.

FIG. 2 is a timing chart illustrating an operation when a foot brake is operated in this embodiment.

FIG. 3 is a timing chart illustrating the operation when the parking brake is operated in this embodiment.

FIG. 4 is a block diagram showing an example of a conventional configuration.

FIG. 5 is a block diagram showing another conventional configuration example.

[Explanation of symbols]

1 Brake switch 3 Microcomputer (microcomputer) 4 Operation section 5 Electronic volume

Claims (1)

[Scope of utility model registration request] Claim 1: An automatic volume control device that automatically controls the volume of an in-vehicle audio device according to surrounding conditions, which detects an output signal when a brake switch is turned on or off, and adjusts the volume after a predetermined period of time. An automatic volume control device characterized by comprising a control means that operates to change the volume.