KR200204784Y1 - The voltmeter and thermometer for a stereo-set of antomobile - Google Patents

Abstract

The present invention relates to a voltage and temperature meter for car audio, and when the AC power or DC power is supplied from the outside, the power supply is applied to the rated DC power,

The user operates the mode selection switch, set switch, up switch, and down switch of the key input unit so that a value corresponding to the set value of the voltage or temperature is input to the microprocessor,

The microprocessor compares the set value of the voltage with the operating power by the user and compares the set value of the temperature with the temperature input through the sensor to determine whether the voltage is lower than the set value or the temperature is higher than the set value.

The current voltage is lower than the set value arbitrarily set while using audio by operating the 3-digit segment IC in the drive IC receiving the data and control signals from the microprocessor while displaying the voltage value and temperature setting value or the current measurement value. If the current temperature is higher than the set value, the alarm sound will be used to make the car audio safe.

Description

Voltage and temperature meter for car audio {The voltmeter and thermometer for a stereo-set of antomobile}

The present invention relates to a voltage and temperature meter for car audio. In particular, the present voltage can be connected to an amplifier or speaker of a car audio so that the current voltage or temperature can be measured. When the current temperature is higher than the set value that is set arbitrarily, the alarm sound is issued so that the car audio can be used safely and it is related to the voltage and temperature meter for the car audio that can check the status according to the operation.

In general, a driver driving a car must drive while properly looking at the front, left, right and rear, and can reach a desired destination by driving the car straight, turning left / right or backward.

And while driving a car can be freely by the operation of a monotonous device, such a freeze can lead to an accident when the drowsiness, so much attention is required.

Therefore, the driver driving the car may use a variety of methods such as chewing gum to prevent drowsiness, but they use a lot of methods to appease freeness and improve mental concentration while listening to cheerful music.

And once the driver turned on the audio while driving, it became essential for the car to run so that it would not turn off even when the car was turned off.

However, the car audio is installed inside a narrow car, and the cooling of the internal device is not performed smoothly. Therefore, when the car is operated for a long time, the performance of the audio may be affected.

Therefore, in the past, a meter connected to the car audio was installed to display the current operating voltage value on the car audio simply by using a VU meter or digitally.

However, in the conventional car audio meter as described above, the driver can check the state of the audio that is almost operated while the driver is driving the car by the voltage value. However, in the case of the electronic UV meter, the output voltage is simply Because of the low display accuracy, it tends to be used for decoration and the latter tends to be used, and the latter digital meter has the advantage that it can be used practically, while only the voltage is simply displayed, which is vulnerable to information display required by the driver. There were disadvantages such as that.

Accordingly, the present invention can measure the current voltage or temperature by connecting to the amplifier or speaker of the car audio so that the current voltage is lower than the set value or the current temperature is arbitrarily set while using the audio inside the car. The purpose of the present invention is to provide a car audio voltage and temperature meter that can use car audio safely by setting an alarm sound when the set value is higher than the set value.

The present invention for achieving the above object is a power supply for always being applied to the rated DC power as the AC power or DC power supplied from the outside;

A key input unit for transmitting a value corresponding to a set value of a voltage or temperature input by a user to the microprocessor according to a state of operating the mode selection switch, the set switch, the up switch, and the down switch;

A microprocessor that determines whether the voltage is low or the temperature is high by comparing the set value of the temperature and the temperature input through the sensor while comparing the set value of the voltage input by the user's selection through the key input unit with the operating power;

It is composed of driving ICs that display voltage and temperature setting values or current measurement values while receiving data and control signals from the microprocessor and operating 3-digit segment ICs. When the temperature is lower or the current temperature is higher than the set value, the alarm sound is issued to enable the car audio to be used safely and to check the status according to the operation.

1 is a schematic view showing the overall configuration according to an embodiment of the present invention.

2 (a) to 2 (d) are circuit diagrams showing a power supply and an input side configuration of the present invention.

3 is a circuit diagram showing the configuration of a microprocessor of the present invention.

Figure 4 is a circuit diagram showing the configuration of the key input and segment display unit of the present invention.

Explanation of symbols on the main parts of the drawings

1: power supply 2: key input

3: microprocessor 4: temperature sensor

5 driving part 6 segment display part

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing a schematic configuration of the present invention,

A power supply unit 1 for always supplying a rated DC power as AC power or DC power is supplied from the outside;

According to the mode of operation of the mode selection switch SW1, the set switch SW2, the up switch SW3, and the down switch SW4, a key for transmitting a value corresponding to the set value of the voltage or temperature input by the user to the microprocessor An input unit 2;

Comparing the set value of the voltage input by the user's selection through the key input unit 2 with the operating power, and comparing the set value of the temperature with the temperature input through the sensor 4 to determine whether the voltage is low or high. A microprocessor (3);

The drive unit 5 is configured to receive data and control signals from the microprocessor 3 and operate the three-digit segment display unit 6 to display a set value of a voltage value and a temperature or a current measurement value.

The operation process of the voltage and temperature meter for the car audio of the present invention configured as described above will be described in detail with reference to the circuit diagrams of FIGS. 2 to 4.

When AC power is input from the outside, the voltage value divided by the resistors R1 and R2 is applied to the rectification and waveform shaping circuits of the diodes D1 and D2, the resistor R3 and the capacitors C1 and C2 and C3. This allows the waveform to be supplied to the standardized DC power supply (ADIN-DC) (A in FIG. 2).

When the DC power is applied from the outside, the voltage value divided by the resistors R4 and R5 can be supplied to the stable DC power supply ADIN-AC via the protection diode D3 and D4 (b of FIG. 2). .

The measured value of the temperature input from the temperature sensor 4 is input to the temperature measured value TEM-CON via the resistor R6 and the condenser C4 (Fig. 2).

The operating power source by the DC power source flows in only one direction through the backflow prevention diode D5 and is popularly turned on at the base of the switching transistor TR1 via the bias resistors R7 and R8 to turn on the transistor TR1. As it is turned on, the DC power flowing in one direction through the backflow prevention diode (D6) flows through the protection resistor (R9) through the emitter-collector of the transistor (TR2) and is always rated DC through the constant voltage IC (IC1). The power source B + is applied (D in FIG. 2).

As shown in FIG. 3, the stable DC power source ADIN-AC and the temperature measurement value TEM-CON are inputted through the input terminal RA1 RA2 through the connector CON1 and the above-described standardized DC power source ( The microprocessor 3 having the ADIN-DC input to the input terminal RA0 through the connector CON2 has a built-in analog / digital converter and a program memory, and converts the input analog data into digital to recognize the program memory. The internal operation is controlled by the stored control method and order.

The rated DC power source B + is supplied to the operating power source required for internal devices including the microprocessor 3.

3 and 4, the key input signal KEY-IN output through the connector CON3 of the microprocessor 3 is a mode selection switch SW1, a set switch SW2, and an up switch. It returns to the microprocessor 3 via the connector CON4 via the SW3 and the down switch SW4 and recognizes the set value of the voltage or temperature input by the user.

And three driving ICs 5a, 5b and 5c of the driving unit 5 which receive the data DATA, the output enable signal OE and the control signal of the status signal ST from the microprocessor 3. ) Operates the three segment ICs 6a, 6b and 6c of the segment display unit 6 and displays the set value of the voltage value and the temperature or the current measurement value while passing through the buffer 7.

That is, as the user turns on the mode selection switch SW1 of the key input unit 2 once, the menu of power setting and temperature setting is repeatedly displayed on the segment display unit 6 so as to recognize the type of setting desired by the user.

When the up switch SW3 is turned on or the down switch SW4 is turned on while the user selects the desired type of setting, the set value is increased by 1 or the value is decreased by 1 according to the number of times or the time of depressing. To select.

When the set switch SW2 is turned on while the user sets the desired set value, the microprocessor 3 recognizes the current set value as a set value of the set type and stores it in the internal memory.

After the setting is completed, the microprocessor 3 receives the temperature inputted through the temperature sensor 4 and the operating power of the audio device as a digital value through an internal analog-to-digital converter. 5) and the segment display unit 6 to display the current temperature and voltage value so that the user can accurately recognize the state of the audio.

At the same time, while comparing the set value of the voltage input by the user's selection through the key input unit 2 with the operating power, the current voltage is low or the temperature is high compared to the temperature set value and the temperature input through the sensor 4. In this case, an alarm is issued by the microprocessor 3 that recognizes this so that the user can recognize it.

Therefore, by the voltage and temperature meter for car audio of the present invention, when AC power or DC power is supplied from the outside, the rated DC power is applied from the power supply unit.

The user operates the mode selection switch, set switch, up switch, and down switch of the key input unit so that a value corresponding to the set value of the voltage or temperature is input to the microprocessor,

The microprocessor compares the set value of the voltage with the operating power by the user and compares the set value of the temperature with the temperature input through the sensor to determine whether the voltage is low or the temperature is higher than the set value.

The drive IC receiving data and control signals from the microprocessor operates the 3-digit segment IC to display the voltage and temperature setting values or the current measurement values. When it is higher than the set value, it emits an alarm sound so that the car audio can be used safely and the status according to the operation can be checked.

Claims (1)

The input AC power is a DC power waveform shaped by rectification and waveform shaping circuits of split resistors R1, R2, diodes D1, D2, resistors R3, and capacitors C1, C2, C3. To (ADIN-DC), Input DC power is supplied to the stable DC power supply (ADIN-AC) through the split resistor (R4) (R5) and the protection diode (D3) (D4), The measured value of the temperature input from the temperature sensor 4 is input to the temperature measured value (TEM-CON) through the resistor R6 and the capacitor C4, The DC power is applied through the reverse flow prevention diode (D5), the bias resistor (R7) (R8) and the switching transistor (TR1), As the transistor TR1 is turned on, DC power flowing in one direction through the non-return diode D6 passes through the emitter-collector of the protective resistor R9 and the transistor TR2 and is rated at the constant voltage IC IC1. DC power (B +) is applied, The stable DC power supply ADIN-AC and the temperature measurement value TEM-CON are inputted through the connector CON1, and the standardized DC power supply ADIN-DC is connected to the microprocessor 3 through the connector CON2. To be entered in The key input signal KEY-IN output through the connector CON3 of the microprocessor 3 is via the mode selection switch SW1, the set switch SW2, the up switch SW3, and the down switch SW4. To be returned to the microprocessor (3) via the connector (CON4), The data DATA, the output enable signal OE and the state signal ST of the microprocessor 3 are passed through the three driving ICs 5a, 5b, and 5c of the driving unit 5, and the segment display unit 6 Voltage and temperature meters for car audio configured to display the voltage and temperature settings or current measurements while operating the four segment ICs (6a) (6b) (6c) (6d).