KR101153399B1

KR101153399B1 - A wireless intellesent sensor method for human and temperature detector

Info

Publication number: KR101153399B1
Application number: KR1020100080237A
Authority: KR
Inventors: 이범용; 김호진
Original assignee: 김호진; 우인화학 주식회사
Priority date: 2010-08-19
Filing date: 2010-08-19
Publication date: 2012-06-05
Also published as: KR20120017568A

Abstract

The present invention can detect the human body, ambient noise, indoor temperature, built-in battery low voltage detection, LED flashing, wireless transmitter drive and push button signal recognition at low power by using 6-pin terminals except the 2 pins for the 8-pin one-chip microcomputer power supply. The present invention relates to a wireless human body and a temperature sensing intelligent sensor that includes a circuit capable of automatically detecting a noise, and a temperature sensor and a voltage sensing circuit.

Description

A wireless intellesent sensor method for human and temperature detector

The present invention relates to a device installed indoors to sense the human body and temperature to transmit data wirelessly, and more specifically, human body detection at low power using a 6-pin port except for the 2 pin for the power supply of 8-pin one-chip microcomputer, ambient noise It is configured to detect, indoor temperature detection, internal battery low voltage detection, LED flashing, wireless transmitter operation and push button signal recognition, and it is wireless human body equipped with temperature sensor and voltage sensing circuit for operation correction of weak sensor. And a temperature sensing intelligent sensor.

In general, in order to achieve an intelligent sensor having various functions such as a human body and a temperature sensor, which is conventionally used, a relatively large number of pins and a tendency to be composed of expensive microcomputers, and PIR (Pyroelectric Infrared Sensor) used as a human body sensor are weak to noise. There is a problem that the detection accuracy is low and the error occurrence rate appears a lot.

Another conventional technology uses expensive and precise components to accurately measure indoor temperature and detect low voltage of a battery, and solves the noise problem and does not have various functions, and therefore, costs and time required to add it are added. In this case, the low-cost parts have to be adjusted at the time of use, and there is a problem that the error rate is high and various functions are not given.

Another conventional technology requires a separate installation of a human body sensor and a temperature sensor, which requires a lot of cost and installation space, and the hassle of writing a program to drive each separately, thereby enabling various functions to be efficiently used. There is no problem.

The problem to be solved by the present invention was devised to solve the problems of the prior art, by using six pins except two pins for power supply efficiently, low-power human body detection, ambient noise detection, room temperature detection, built-in It provides various functions such as low voltage detection of battery, blinking LED, driving of wireless transmitter and signal recognition of push button.

Another problem to be solved by the present invention is to increase the reliability by reducing the malfunction of the human body sensor by detecting the noise with a noise detection loop to prevent the malfunction of the human body sensor is weak to noise.

Another problem to be solved by the present invention is to increase the convenience of the configuration and the productivity of the product manufactured by using the configuration to automatically perform the adjustment of the temperature sensor and the low voltage detection circuit.

Another problem to be solved by the present invention is to extend the battery life by reducing the power consumption by configuring each sensor that senses the temperature and low voltage to operate periodically according to the time set in the program and to supply power only when necessary have.

The solution of the present invention is installed indoors to detect intruders or occupants, and to sense the temperature to recognize the control of the air conditioner or the occurrence of fire, etc. except for the power supply 2 pin for low-cost, small and lightweight 8-pin one-chip microcomputer 6-pin terminal, low-power human body detection, ambient noise detection of the human body sensor, indoor temperature detection, built-in battery low voltage detection, LED flashing, wireless transmitter drive and push button signal recognition, etc. An object of the present invention is to provide a wireless human body and a temperature sensor intelligent sensor equipped with a temperature sensor and a low voltage sensor circuit.

Another means of solving the present invention is to install a noise detection loop for detecting the ambient noise of the human body sensor in order to prevent malfunction of the human body sensor to detect the noise, the detected noise is higher than the value set in the memory In this case, it is determined that the human body sensor is malfunctioning, and when it is below the set value, it is determined that the human body sensor is normally operated to provide a wireless human body and temperature sensing intelligent sensor which has improved the accuracy and reliability of the determination.

Another solution of the present invention is to measure the voltage of the battery using a resistor and a silicon diode, the silicon diode voltage is almost constant irrespective of the battery voltage, the lower the voltage of the battery detected by the resistance is smaller The present invention provides a wireless human body and a temperature sensing intelligent sensor that detects this and determines a low voltage when it is lower than a set value and displays a message informing a battery replacement.

Equation (2) is an equation used to measure the voltage of a battery to check battery life with an 8-bit A / D converter.

Voltage across resistor (108) = battery voltage-diode voltage (1)

According to the present invention, by using six pins efficiently, low-power human body detection, ambient noise detection, room temperature detection, built-in battery low voltage detection, LED flashing, wireless transmitter driving and pushbutton signal recognition are given a variety of functions to narrow There is an advantageous effect that can be conveniently installed in the space.

Another effect of the present invention is to increase the reliability by reducing the malfunction of the human body sensor by detecting the noise with a noise detection loop to prevent the malfunction of the human body sensor that is weak to noise.

Another effect of the present invention is to increase the convenience and productivity of the product produced by using the configuration to perform the control of the voltage sensing circuit automatically in conjunction with the radio transmitter control signal.

Another effect of the present invention is to extend the battery life by reducing the power consumption by configuring each sensor for sensing the temperature and low voltage periodically measured at the time set in the control program and supplying power only when necessary.

1 is a block diagram of a wireless human body and a temperature sensing intelligent sensor according to the present invention
2: Configuration diagram of the temperature sensing circuit of FIG. 1
3: Configuration diagram of the low voltage detection circuit of FIG. 1
4: LED driving circuit configuration
5: FSK transmitter driving circuit configuration
<Short description of drawing and number>
100: 8-pin 1-chip Microcomputer 101: PIR
104: noise detection loop 105: LED
106: low voltage sensing diode 110: thermistor
111: push button 112: power button
113: battery 200: RF transmitter
204: FSK TX on input 205: FSK data input

Hereinafter, the present invention will be described in detail. The present invention is installed indoors as a human body sensor to detect the intruder or occupant, and the temperature sensor to detect the temperature to control the cooling or heating device or to recognize the fire, such as a function that can be linked to the external control device wirelessly It is equipped with an intelligent sensor.

The wireless human body and temperature sensing intelligent sensor according to the present invention detects human body and surrounding noise with low power consumption by using 6 pin terminals excluding 2 pins for power supply in a low cost, compact and lightweight 8 pin one chip microcomputer. It is equipped with a circuit that performs indoor temperature sensing, built-in battery low voltage sensing, LED flashing, wireless transmitter driving, and push button signal recognition, and has a technical configuration that can correct the operation of a human body sensitive to noise.

In addition, the present invention by installing a noise detection loop for detecting the ambient noise around the substrate in which the human body sensor is installed in order to prevent the malfunction of the human body sensor for detecting infrared rays generated from the human body to detect the noise, the detected noise If is higher than the set value is determined that the human body sensor is malfunctioning, if less than the set value is configured to increase the accuracy and reliability by determining that the human body sensor is normal operation. A specific embodiment according to the present invention will be described.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will now be described with reference to the drawings. 1 shows a configuration of a wireless human body and a temperature sensing intelligent sensor according to the present invention. FIG. 2 shows the configuration of the temperature sensing circuit of FIG.

In FIG. 1, the signal sensed by the human body sensor 101 and the noise detection loop 104 is input amplified through the low power amplifier 103 through the electrolytic capacitor 102, and then to the P1 and P2 pin terminals of the one chip microcomputer. The input signal is used to determine whether the human body sensor 101 operates normally after converting the digital signal into an A / D converter embedded in the microcomputer.

More specifically, the human body sensor measured on the basis of the size of the signal detected by the human body sensor 101 and the noise detection loop 104 to detect the infrared rays generated by the human body to determine the presence of a person into a digital signal When the signal is larger than the value set in the memory and the noise signal is smaller than the set value, the human body sensor 101 determines that the human body is normally detected.

When the noise signal measured by the noise detection loop 104 is recognized as a larger value than the set value, the noise detection loop 104 is configured to treat the human body detection signal as a malfunction due to noise and exclude it from the determination.

That is, the present invention converts the signals detected by the human body sensor 101 and the noise detection loop 104 into digital signals only when the measured human body detection signal is larger than the value set in the memory and the noise signal is smaller than the set value. The human body detecting sensor 101 may be configured to interwork with the cooling or heating device by determining that the human body is normally detected.

The noise detection loop 104 surrounds the sensor in a PCB pattern on a printed circuit board (PCB) on which the human body detection sensor 101 is installed. By amplifying the signal detected by the noise detection loop 104 formed into a shape and comparing it with a value set in the memory, it is possible to determine whether the human body detection sensor 101 is noise in a state in which it can normally operate.

In the 8-pin microcomputer (100 in FIG. 1) used in one embodiment according to the present invention, the P1 pin terminal of the six pins (P1 to P6 in FIG. 1 100) except for 2 pins for power supply is measured by a human body sensor. An A / D input terminal for converting and inputting a signal into a digital signal, and a P2 pin terminal is an A / D input terminal for converting and inputting a noise signal detected by a noise detection loop into a digital signal. In FIG. 1, the 8-pin micom 100 P6 pin is fixedly used as a digital input for a pushbutton used for setting or testing, and the P3 / P4 / P5 pins are used for driving temperature sensing, low voltage sensing, RF transmission, and LEDs. Used as a pin terminal.

First, the temperature sensing will be described in more detail. After configuring P3 and P4 as digital outputs to sense the temperature, in Fig. 1, if pin P3 is high and P4 is low, the circuit shown in Fig. 2 becomes.

At this time, the LED 105 and the silicon diode 106 are reversed, there is no current flow, and the voltage calculated by Equation (2) is applied to the thermistor.

Battery (113) Voltage X Thermistor Resistance

Thermistor Voltage = -------------------------------- (2)

Resistance (107) + Resistance (108) + Thermistor Resistance

If the voltage calculated by Equation (2) is configured with the P5 pin terminal as the A / D converter input terminal and the voltage signal is detected, the temperature can be known. That is, the room temperature may be measured by correlating the voltage and the temperature measured at both ends of the thermistor with the resistance value of the thermistor which changes according to the indoor temperature change.

Next, the low voltage detection of the battery will be described. In order to detect the low voltage of the battery, the circuit shown in FIG. 3 is configured when P5 is set to the digital output low when the P4 pin terminal is the digital output high during RF transmission.

In FIG. 3, the LED 105 is reversed so that no current flows, and a constant voltage is applied across the resistor 108 by the current flowing through the silicon diode 106.

When the voltage across the resistor 108 is input to the P3 pin terminal through the resistor 107 and A / D converted, the voltage is detected by the following equation.

Voltage across resistor (108) = battery voltage-diode voltage (1)

That is, the voltage measured across the resistor 108 is detected as an A / D converted value through the P3 pin terminal as a value calculated by Equation (1), and the voltage across the diode 106 is a battery. Since the voltage is almost constant regardless of the voltage, the voltage detected from both ends of the resistor 108 decreases as the battery voltage drops, and when the measured value is less than the set value, it is judged as a low voltage and a notification signal is displayed through the LED for requesting battery replacement. Can be generated or sent to a wireless transmitter.

Next, the driving of the LED 105 will be described. In Fig. 4, in order to drive the display LED 105 for notifying of battery replacement or abnormality, P3 / P4 is turned low as a digital output among pins P3 / P4 / P5, and P5 is turned high as a digital output. high), the LED is turned on through the LED driving resistor 109 as shown in FIG.

At this time, since the thermistor 110 and the resistors 107 and 108 are more than a few tens of microwatts, power that is negligibly small compared to the current flowing through the LED is consumed.

Next, the driving of the radio (RF) transmitter 200 will be described. In case of AM, it is composed of P4 pin terminal only, and it is possible to drive AM wireless transmitter by configuring digital output high or digital output low.

In the case of the frequency shift keying (FSK) method, two output terminals are required to output the transmission output terminals TX on 204 and the FSK data 205.

Thus, as shown in FIG. 5, when pin P4 is digital output high, a voltage is accumulated in capacitor 202 through diode 201 and high for a certain time when low as digital output. It is configured to maintain a high state, and after a certain time after the end of the driving is made low by the capacitor discharge resistor (203). Therefore, in P4, if only FSK data is output, the TX on 204 input is kept on.

The above-described P3 / P4 / P5 pin terminal, the temperature configuration, low voltage detection, RF transmission, and the technical configuration for driving the LED are all configured to run the control program designed and manufactured in accordance with the present invention in one chip microcomputer.

The setting values for comparing with the signals measured by the sensors, such as the temperature, the low voltage, and the noise, may be stored in a memory when the control program is written or may be configured to be set by the user.

In another method of storing a set value according to the present invention, a push button 111 used to transmit a test RF signal during operation of a device in a room adjusted to 25 degrees C to set a set value for temperature and low voltage recognition. When the power switch of the device is turned on while pressing, the microcomputer 100 recognizes that the setting value is input and stores the data detected by the equation (2) as a value of 25 degrees Celsius in the memory.

That is, the data recognized and stored in Equation (1) and stored in the battery is recognized and stored as normal. This value is then stored in the memory as a set value and used to compare the temperature and battery status with the signals measured by the sensors, respectively.

For low power operation of the wireless human body and temperature sensing intelligent sensor according to the present invention, a circuit is usually configured with pins P3 / P4 / P5 as a digital output low to power only the circuit in which the noise detection loop and the human body sensor are interlocked. Designed and manufactured to consume, micom is configured to operate only a few times a second. The operating time is only a few hundred microseconds.

The 8-bit microcomputer used in the present invention is just one embodiment, and a technology capable of performing temperature sensing, low voltage sensing, RF transmission, and LED using a one-chip microcomputer with small size and light weight and built-in A / D converter. Intelligent sensor having a configuration is within the protection scope of the present invention.

In addition, after each operation, the power consumption is reduced to almost zero, and the microcomputer's built-in WDT (Watch Dog Timer) is designed to wake-up every few hundred ms to minimize the microcomputer power consumption. This is to extend the life of the battery significantly.

The present invention uses the 6-pin port except for the 2-pin power supply of 8-pin one-chip microcomputer to detect human body, ambient noise, room temperature, internal battery low voltage, LED flashing, wireless transmitter drive and push button signal recognition at low power. It can be used industrially by constructing low power consumption with multi-function by providing wireless human body and temperature sensing intelligent sensor that automatically adjusts operation of temperature sensor and low voltage sensing circuit and compensates for weak circuit and noise. This is very high.

Claims

In the wireless human body and temperature sensing intelligent sensor,
Human body detection sensor for detecting the movement of the person by detecting the infrared rays generated in the human body of the person;
A noise detection loop for detecting ambient noise;
A temperature sensor for sensing a temperature;
Diodes and resistors for sensing battery voltage;
A microcomputer with a built-in A / D converter that controls the sensor and the elements and converts the signal measured by the sensor into a digital signal; And
Wireless human body and temperature sensing intelligent sensor having a wireless transmitter for wirelessly transmitting the data processed by the microcomputer.

The method according to claim 1,
Wireless human body and temperature sensing intelligent sensor further comprising a noise detection loop for detecting the noise around the PCB in which the human body sensor is installed in order to detect the malfunction of the human body sensor.

The method according to claim 1,
Wireless human body and temperature sensing intelligent sensor configured to be connected to the microcomputer and configured to measure the room temperature by matching the voltage and the temperature of the both ends of the thermistor changes by the thermistor resistance value changes in accordance with the temperature change of the room.

The method according to any one of claims 1 to 3,
Wireless human body and temperature sensing intelligent sensor is configured to be connected to the microcomputer, and to determine the battery low voltage by comparing the voltage across the resistor 108, which is a value obtained by subtracting the voltage applied to the diode from the battery voltage.

The method of claim 4,
The wireless human body and temperature sensing intelligent sensor configured to be connected to the microcomputer, the LED 103 and the LED driving resistor (109) in series, the LED is turned on according to the determination result of the microcomputer.

The method according to any one of claims 1 to 3,
The wireless human body and temperature sensing intelligent sensor, which is configured to be connected to the microcomputer and configures a wireless transmitter by using one terminal of the microcomputer as a digital output high or a digital output low.

The method according to any one of claims 1 to 3,
The wireless human body and temperature sensing intelligent sensor, which is configured to be connected to the microcomputer and comprises a wireless transmitter 200 as an output terminal for outputting a transmission output terminal (TX) and FSK data.

The method of claim 4,
The wireless human body and temperature sensing intelligent sensor, characterized in that the configuration is connected to the microcomputer, and the configuration of setting the setting value in the memory is input to the memory or automatically stored by the microcomputer using the push button.

The method according to claim 5,
The wireless human body and temperature sensing intelligent sensor is configured to operate the microcomputer only for a short time at a predetermined interval to minimize power consumption, and to maintain a sleep state for the rest of the wireless human body and temperature sensing intelligent sensor.