UA90314C2 - Heat fire alarm device - Google Patents

Abstract

The invention relates to fire warning. The heat fire alarm device comprises a microcontroller, an output signal shaper, a unidirectional conductance element, a current and voltage limiter, two condensers, two output terminals as well as a resistor and a light-emitting diode. It comprises the additional second resistor and other connections between elements, so the light-emitting diode performs a reference voltage shaper function. In the proposed heat fire alarm device is reached an error reduction of the device.

Description

management. Such a detector also contains a transformer terminal 6. The second input terminal 7 is connected to a key and diodes. of the second output of the first capacitor 5, the second

The disadvantage of the known detector is a significant loss of the power supply of the microcontroller 1 and the reset of the parameters from the detector to the detector of the current and voltage limiter 4, the first outputs (reproducibility) due to the errors of the second capacitor 8 and the LED 9. The second sator and thermistor TRI1-68, the initial value of the output of the LED 9 is connected through the first resistance, which is not guaranteed by the manufacturer. Resistor 10 to the second output of the microcontroller 1. The presence of thermal detectors is one of the main parameters. The first input of the microcontroller 1 is connected to the second meter according to the requirements of regulatory documents by the output of the second capacitor 8 and the first output such as DSTU EM54-5: 2003 and NPB 85-2000. house of the thermistor 11. The second output of the thermistor 11

The invention is based on the task - connected to the second input of the microcontroller 1. reducing the error of the detector due to the use of the second resistor 12 is connected in parallel to the processing and control unit based on the microohm capacitor 8, and the second input of the microcontroller controller with analog inputs, the shaper ra 1 is connected to the second output of the LED 9 and the reference voltage on the LED, as well as the extraction by the second input of the power supply of the shaper 2 of the converter of the temperature into the length of the pulses of the output signal. on the second capacitor and the thermistor. The thermal fire detector works like this

The set task is solved by the following. If the ambient temperature of the fire detector, which contains the unit, is higher than the maximum temperature of use and control, the first output of which is connected to the detector, then after applying the voltage to the input of the output signal generator, the power supply to input terminals 6 and 7 the detector must have the first input of the power supply connected to be in the regular mode of operation. The electric current of the element of one-sided conductivity and the first direct current passing through the element 3 through one input of the current and voltage limiter, the output of which side conductivity and the voltage limiter 4 and the current connected to the first input of the power supply charge the first capacitor 5 of the processing unit and control and the first terminal The magnitude of the current limitation by the limiter 4 on- the first capacitor, the input of the single-sided strip element and the current sufficient to implement the start of the conduction is connected to the first input terminal, and the microcontroller 1 at its minimum working second input terminal is connected to the second voltage output. At this moment, the microcontroller 1 installs the first capacitor, the second inputs power the low potential signal levels of the processing and control unit and the limiter at its outputs and goes into a standby state at the minimum current and voltage, the first outputs of the second capacitor current consumption. Accumulation of charge on the sator and the LED, the second output of which is connected to the capacitor 5 continues to the voltage level reached through the first resistor to the second output of the voltage level on it, which is limited by the processing and control unit, the first input of which is the voltage and current limiter 4. This level is not connected to the second terminal of the second capacitor must exceed the maximum operating voltage and the first terminal of the thermistor, the second terminal of which is the strip of microcontroller 1. Due to the low voltage level of the signal at its input, which is connected to the second input of the microcontroller, the form is different that which contains the second resistor 2 of the output signal will be closed. A low torus connected in parallel with the second capacitor is the potential level of the signal at the second output of the miktor, and the second output of the LED is connected to the controller 1. Also, it will not allow the inclusion of the giM by the input of the power supply of the LED shaper 9, therefore, on both analog inputs of the output signal and the second the input of the microcontroller processing unit 1 will have low sig- and control performed on the microcontroller, nal. After stabilizing the voltage on the first con- which has at least two analog inputs. densatori 5 the work of the microcontroller begins

In the proposed thermal fire station 1 after the standby state. On its second output, detectors due to the use of additional periodically, with a period of 1-2s, begin to appear resistor, microcontroller with analog inputs - high-level pulses. The electric current that we and other connections between the elements, when the light will flow through the first resistor 10 and the LED performs the function of the generator of the reference voltage, the diode 9, will create on this LED 9 directly compliance with the reproducibility requirements of the voltage drop and light emission is achieved . Said-

DSTU EM54-5: 2003 and NPB 85-2000. the power of this current will exceed the value

The figure shows the block diagram of thermal current limitation by the voltage limiter of the 4th fire detector. current, so the discharge of the first condensate will begin

Thermal fire detector (see figure) torus 5. After the end of the pulse on the second microcontroller 1, the first output of which is connected to the microcontroller 1, the voltage on the first output signal capacitor 5, connected to the input of the shaper 2, will again reach a fixed value, Lu The first power supply input of the former 2, which is set by the voltage and current limiter 4. of the output signal is connected to the output of the element C. Thus, in the alternate mode of operation, the first one-sided conductivity and the first input of the limiting capacitor 5 will slowly charge up to the current and voltage of the current and voltage. The output of the limiter 4 of the band, which does not exceed the maximum operating current and voltage, is connected to the first input of the band of the microcontroller 1, and the power supply of the microcontroller 1 and the first (during the action of the pulse on the second output of the microcontroller output of the first capacitor 5. The input of the element Z roller 1) to a voltage exceeding the minimum one-sided conductivity connected to the first input - the operating voltage of the microcontroller 1. Impulses of sta-

of painful amplitude from the LED 9 will receive a change in its state. In the "FIRE" state, a high potential voltage divider, created by the thermistor 11 and the signal through which the switched resistor 12 occurs, appears on the first and second analog inputs of the microcontroller 1 and its output. Thus, on the first analog - nth shaper 2 of the output signal. A signal is sent through the inputs of the log input of the microcontroller 1, its power supply is powered by a current from the loop, which is processed by the microcontroller 1 relative to the fa of the fire alarm, connected to the inputs of the reference voltage, which is applied to its second terminal 6 and 7. In this case, the LED 9 will be analog Exit. When the ambient temperature changes, light will be emitted, in addition, the ratio of the voltage drop between the input terminals 6 and 7 will change, but the voltage drop on the thermistor 11 and the second rubber is lower than the maximum operating voltage of the microcircuit 12. The analysis of this ratio is carried out troller 1. At the second output of microcontroller 1, microcontroller 1 not only sets a low potential level or critical value corresponding to the temperature of the high-impedance state. activation of the detector at a quasi-static If the voltage drop between the input terminals would increase the temperature, but also the change of this ratio and 7 will exceed the minimum value of operation in time to meet the requirements of the standard voltage of the microcontroller 1, then the detector will tive DSTU EM54-5: 2003 and NPB 85-2000 in order to stay in the "FIRE" state indefinitely. detectors of class K. It is only possible to remove the detector from this state

The instability of the voltage drop on the LED by turning off the supply voltage of the fire loop 9 will not affect the error of the detector, therefore the alarm (voltage between the input terminals 6 that the microcontroller 1 performs correlation analysis and 7) for a time sufficient to discharge the first resistance of the thermistor 11 and the second resistor of the capacitor 5 to the value at which the inputs 12. Since it is possible to use the second resistor power supply of the microcontroller 1, the torus 12 with a resistance error of 21905, and the thermistor 11 with a voltage below the minimum value. the error of the initial resistance 5595 and discretization - In the proposed thermal fire station, analog inputs of the microcontroller 1 at least detector due to the use of an additional 8 digits ensure the reproducibility of the detector-resistor, microcontroller with analog inputs in accordance with the requirements of the standards NPB 85-2000 and we and other communications connections between elements when light

DSTU EM54-5: 2003. the diode performs the function of a reference voltage generator,

When the ambient temperature is reached, a decrease in the error of the detector and the environment of the static temperature of the operation is achieved. The compliance of the reproducibility with the requirements of DSTU EM54-5: the detector, or with a rapid increase in temp- 2003 and NPB 85-2000. rature microcontroller 1 makes a decision about 4 z: sto h o y t " 2 tt

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Computer typesetting by A. Ryabko Signature Circulation 26 approx.

Ministry of Education and Science of Ukraine

State Department of Intellectual Property, str. Urytskogo, 45, Kyiv, MSP, 03680, Ukraine

SE "Ukrainian Institute of Industrial Property", str. Glazunova, 1, Kyiv - 42, 01601