KR0155686B1 - Method and curcuit for dew detecting apparatus - Google Patents

Abstract

The present invention relates to a video tape recorder and a camcorder, which uses a temperature and humidity sensor to sense and display a temperature state and a humidity state on a display, and checks the temperature state and humidity state according to the software inside the microcomputer to obtain high humidity. When dew occurs, the buzzer and light emitting diode are automatically driven to warn the user to stop the operation of the device in a high humidity condition, thereby preventing tape damage and device damage.

Description

Dew condition automatic warning circuit and method using temperature and humidity sensor

1 is a dew point automatic warning circuit diagram using a temperature and humidity sensor according to the present invention.

2 is a flow chart for implementing a method for automatically warning the dew state using a temperature and humidity sensor according to the present invention.

* Explanation of symbols for main parts of the drawings

10: power supply unit 20: detection unit

30: micom 40: display unit

50: dew warning TS: temperature sensor

MS Wet Sensor R1: Resistance

LED1: Light Emitting Diode ADC1, ADC2: Analog Digital Converter

The present invention relates to a video tape recorder and a camcorder, and more particularly, by using a temperature sensor and a humidity sensor to display a temperature and humidity state on a display board so that a user can recognize it and at the same time, The present invention relates to a dew point automatic warning circuit and a method using a temperature and humidity sensor that automatically alerts the occurrence degree.

Generally, camcorders and video tape recorders have dew sensors to prevent damage to the tape due to moisture, but they do not display the sliding state.

Accordingly, the user cannot grasp the humidity condition according to the operation of the dew sensor, there is a problem that can not prevent the damage of the tape and the damage of the device due to the moisture can not be properly handled even if the humidity increases.

The present invention is to solve this problem, an object of the present invention is to detect the dew state by using a temperature and humidity sensor to automatically inform the user that the dew is generated by the buzzer and the light emitting diode to prevent the tape from operating And to provide a dew point automatic warning circuit and method using a temperature and humidity sensor to prevent damage to the device.

Features of the present invention for achieving this object, a power supply for supplying power, a sensing unit for sensing the temperature and humidity conditions and converting into a digital signal, connected to the power supply and the sensing unit and input from the sensing unit A microcomputer for outputting a logic high signal when dew is generated by checking the temperature and humidity data, a display unit connected to the microcomputer to display temperature and humidity data input from the sensing unit, and a microcomputer connected to the microcomputer When the output logic of the high state, the buzzer and the light emitting diode are driven to the dew state automatic warning circuit consisting of a dew warning unit that automatically warns the dew state.

Another feature of the present invention is to perform a display routine for displaying temperature and humidity data of a temperature sensor and a humidity sensor, and store the temperature data one second before the routine is stored in a register and compare the current temperature with a current temperature. Temperature checking routine to output a logic high signal to warn that dew occurs when is higher than 10 ℃, and after the execution of the routine, logic to warn of dew when humidity checked by the humidity sensor is 80% or more. Perform a humidity checking routine that outputs a high signal, and after performing the routine, perform a dew warning routine that automatically warns of dew when the buzzer and the light emitting diode are driven when a logic sum of the output logic of the routine is high. And automatic dew point warning using temperature and humidity sensors.

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

FIG. 1 is a dew point automatic warning circuit diagram using a temperature and humidity sensor according to the present invention. The microcomputer includes a power supply unit 10 for supplying power and a sensing unit 20 for sensing a temperature and humidity state and converting it into a digital signal. 30) is connected to check the temperature and humidity data input from the sensing unit 20, if it is determined that dew is generated, and outputs a logic high signal.

The detector 20 is configured by connecting analog digital converters ADC1 and ADC2 to a temperature sensor TS for detecting a temperature state and a humidity sensor MS for detecting a humidity state, respectively.

In addition, the microcomputer 30 is connected to the display unit 40 for displaying temperature and humidity data input from the sensing unit 20.

In addition, when the output logic of the microcomputer 30 is in a high state, a buzzer and a light emitting diode LED1 are driven to connect a dew warning unit 50 that automatically warns of a dew state to the microcomputer 30.

The dew warning unit 50 includes a light emitting diode LED1 driven through the resistor R1 and a buzzer driven through the buzzer driving unit 51 when the temperature and humidity checking output logic of the microcomputer 30 is high. .

2 is a flowchart for performing a method for automatically detecting a dew state using a temperature and humidity sensor according to the present invention, wherein the display routine L1 displays temperature and humidity data detected by the temperature sensor TS and the humidity sensor MS. After the routine (L1) is performed, the previous temperature (TMB) data checking and time checking are performed, and if the difference between the current time (TP) and the previous time (TB) is 1 second, the previous temperature (TMB) data is read. 30) It performs a temperature checking routine (L2) that stores a logic high signal to memorize the dew when the current temperature (TMP) is higher than 10 ℃ by comparing it with the current temperature (TMP) data. And, after performing the routine (L1), if the humidity checked by the humidity sensor (MS) is 80% or more to perform a humidity checking routine (L3) for outputting a logic high signal to warn that the dew occurs, the routine ( L2), (L3) If the signal obtained by the logic of the output logic of the routines (L2) and (L3) is high after the execution, the buzzer and the light emitting diode (LED1) are driven to perform a dew warning routine (L4) to automatically warn of dew.

In the present invention as described above, the temperature and humidity data detected through the temperature sensor (TS) and the humidity sensor (MS) is input to the microcomputer 30 is displayed on the display unit 40 (L1) On the other hand, the microcomputer 30 ) Temperature and humidity checking according to the software inside (L2), (L3).

First, temperature checking checks the previous temperature memory state and checks the time (L2S1), (L2S2).

Then, the time difference between the current time TP and the previous time TB is examined (L2S3). If the time difference is 1 second, the previous temperature checked in the step L2S1 is set in a register on the microcomputer 30 (L2S4). .

After performing the step L2S4, it is checked whether the difference between the current temperature TMP and the previous temperature TMB set in the step L2S4 is 10 ° C or more (L2S5), and the current temperature TMP is 10 than the previous temperature. If higher than or equal to ℃, the microcomputer 30 outputs a logic high signal.

On the other hand, the humidity checking examines whether the current humidity (MP) is 80% or more (L3S1) and outputs a logic high signal when the humidity is 80% or more.

In addition, the logic signals for the temperature difference and the humidity checked in the steps L2S5 and L3L1 are logically summed at the orifice in the microcomputer 30 (L4S1), and the logic signals logically summed to the dew warning unit 50 are applied.

At this time, when a logic high signal is applied to the dew warning part 50, the buzzer driver 51 for warning the dew is driven (L2S2), and the buzzer rings and the light emitting diode LED1 is turned on to inform that dew has occurred. L4S3).

Accordingly, the user is aware of the dew generation and does not operate the tape to prevent the tape from being damaged by moisture.

As described above, the present invention processes the temperature and humidity conditions detected by the temperature sensor and the humidity sensor according to the software inside the microcomputer to warn the user by automatically operating the buzzer and the light emitting diode when dew occurs due to high humidity. By doing so, it is possible to stop the operation of the device in a high humidity state, thereby preventing tape damage and device damage.

Claims (2)

A power supply unit 10 for supplying power, a sensor unit 20 for sensing a temperature and humidity state and converting it into a digital signal, and a power supply unit 10 and a sensor unit 20 connected to the sensor unit 20 Checks the temperature and humidity data inputted from the microcomputer 30 to output a logic high signal when dew is generated, and displays the temperature and humidity data input from the sensor 20 connected to the microcomputer 30. Dew warning unit 50 is connected to the display unit 40 and the microcomputer 30, the buzzer and the light emitting diode (LED1) is driven when the output logic of the microcomputer is in a high state to automatically warn the dew state. Dew condition automatic warning circuit using a temperature and humidity sensor composed of. A display routine L for displaying temperature and humidity data detected by the temperature sensor TS and the humidity sensor MS is performed.After performing the routine L1, the temperature data 1 second ago is stored in a register and the current data is stored in a register. In order to warn that dew occurs when the current temperature is higher than 10 ° C. compared to the temperature TMP, a temperature checking routine L2 is outputted to output a logic high signal, and after the routine L1 is performed, the humidity sensor MS In order to warn that dew occurs when the humidity checked by) is greater than 80%, a humidity checking routine L3 that outputs a logic high signal is performed, and after the routines L2 and L3 are performed, the routine L2 is performed. , The dew point state using the temperature and humidity sensor configured to perform a dew warning routine (L4) to automatically warn the dew by driving the buzzer and the light emitting diode (LED1) when the logic of the output logic of (L3) is high. Auto flickering Way.