The wireless monitor is a monitoring and recording user's ECG data, providing users with real-time monitoring and early warning. It can measure the user's heart rate in a single time, and simultaneously map and store the ECG. Users can query their ECG data on the computer and mobile phone through the PC Suite. It is convenient for users to know and master their heart rate in time. The product is small in size, light in weight, convenient for users to carry, and increases user comfort. The platinum resistance sensor is used to detect the target temperature, and is graphically displayed on the LCD screen. When the temperature exceeds the alarm temperature, the alarm state is displayed on the LCD screen. When the temperature exceeds the alarm temperature, the alarm is realized by the PWM control buzzer. When the temperature exceeds the alarm temperature, the LED warning light is illuminated, and the buzzer and alarm can be turned off or turned on by pressing the button.
The structure of the system is as follows, very simple:
The specific circuit is as follows:
Alarm light circuit
The processor S3C2410 controls the alarm LEDs through GPF4 as shown below:
Buzzer circuit
The processor S3C2410 controls the buzzer through the GPB0 output PWM signal, as shown below:
Button circuit
When GPE11 outputs a 0 level, a jump signal is generated on the EINT0 pin when the button is pressed. The system uses this signal to generate an interrupt. As shown below:
LCD liquid crystal circuit.
The resolution of the LCD screen is 320*240, and the color depth is 16-bit true color.
Temperature acquisition circuit
The sampling temperature range is 0~100°C, and the transmitter converts the temperature signal into a voltage signal of 0~3.3V. The voltage signal is connected to AIN0 of the S3C2410. The system obtains the current temperature value by measuring the voltage signal. The circuit is shown below:
Edit Comment: The device has the functions of information collection, storage, analysis and early warning, and has the characteristics of precise monitoring, touch screen control, simple and convenient. It can continuously monitor the situation for 24 hours, and change the trend in a period of time. If there are abnormal conditions, the alarm can be triggered in time. In order to provide perfect data and technical support, this paper introduces the corresponding module circuit design for the reader's reference!
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