CN204422619U - Hotness alarm device for avoiding fraudulent using electric - Google Patents

Abstract

Hotness alarm device for avoiding fraudulent using electric, belongs to optical field, the utility model be solve the abnormal heat that causes of stealing can the problem of the security incidents such as initiation fire.The utility model comprises microprocessor, SMS module and temperature over-range detecting unit; The temperature over-range signal output part of temperature over-range detecting unit is connected with the temperature over-range signal input part of microprocessor, the instruction output end of microprocessor is connected with the command input of SMS module, and the temperature over-range information of watt-hour meter is sent to designated mobile phone terminal with note form by antenna by SMS module; + 6V direct supply is powered for microprocessor and temperature over-range detecting unit simultaneously; When electricity filching behavior occurs, can cause abnormal heat, when the temperature that TMP03 detects is higher than during to fixed temperature, LED is bright, and instruction Current Temperatures is abnormal, and meanwhile, microprocessor obtains high level as triggering command, drives SMS module to send short messages to designated mobile phone terminal.

Description

Thermal alarm anti-theft device

technical field

The utility model relates to an electric energy metering anti-stealing device, which belongs to the field of electric energy anti-stealing.

Background technique

The watt-hour meter is an instrument for measuring electric energy and is the basis for charging electricity fees. According to analysis, electricity theft is basically achieved by attacking the watt-hour meter. The main methods of stealing electricity include under-voltage stealing, under-current stealing, and Stealing electricity by phase shifting method, etc.

The traditional anti-stealing method mainly adopts the method of adding lead seals to metering cabinets (boxes). The ordinary lead seals in this way are easy to be counterfeited, and they are also easy to be opened and restored by electricity thieves.

With the escalation of electricity theft methods, the anti-theft electricity scheme is also constantly upgraded. In recent years, a relatively new anti-electricity theft solution is to use network monitoring for remote meter reading. Install electric energy meters with remote meter reading function at the power supply end and power consumption end of each distribution line, read the meter at the same time, and use the computer to calculate the power supply and power consumption in the same period of time, and compare it with the theoretical line loss, if If an abnormality is found, there is a measurement problem, and then targeted investigation. This method is relatively reliable, and it is also conducive to improving the management level of line loss management, load control, and distribution network. However, there are many users on a distribution line, and it is still relatively heavy to find out the specific points of power theft.

The following analysis is carried out for the three main ways of stealing electricity:

The first is the undervoltage method, disconnect the neutral wire before the incoming line of the watt-hour meter, and disconnect the neutral wire of the outgoing line of the watt-hour meter at the same time, causing the voltage working coil of the watt-hour meter to lose voltage and cannot be measured, and then use A phase wire (live wire) of the outlet of the watt-hour meter forms a loop with the ground wire.

The second is the phase-shifting method. There is no trace of damage to the wiring device in front of the watt-hour meter, and only one phase wire (live wire) and all or part of the ground wire are used to replace the neutral wire to form a circuit for power consumption, resulting in less metered electricity.

The third method is the undercurrent method. The electricity thief uses various methods to deliberately change the normal wiring of the metering current circuit or deliberately cause a fault in the metering current circuit, so that the current coil of the electric energy meter passes through no current or only part of the current, resulting in low power. count.

The first and second ways of stealing electricity will cause the grounding wire to flow through a large current and heat up. The third way of stealing electricity will cause the wire in the short-circuit part to heat up with a large current. These abnormal heat will cause safety accidents such as fires.

Contents of the invention

The purpose of the utility model is to solve the problem that the abnormal heat caused by stealing electricity will cause fire and other safety accidents, and provides a thermal alarm and anti-stealing device.

The thermal alarm anti-stealing device of the utility model includes a microprocessor, an SMS module and a temperature overrun detection unit; the temperature overrun signal output terminal of the temperature overrun detection unit and the temperature overrun signal input of the microprocessor The command output terminal of the microprocessor is connected with the command input terminal of the SMS module, and the SMS module sends the temperature over-limit information of the watt-hour meter to the designated mobile phone terminal through the antenna in the form of a short message; the +6V DC power supply is also for the microprocessor and temperature overrun detection unit power supply;

The temperature overrun detection unit includes NE555 time base integrated circuit, TMP03 temperature sensor, H11L1M optocoupler isolator, comparator A1, resistor R1, resistor R2, resistor R3, sliding rheostat Rp1, electrolytic capacitor C1, capacitor C2 and light-emitting diode LED;

The +6V DC power supply is simultaneously connected to pin 2 of the TMP03 temperature sensor, one end of resistor R1, pin 6 of the H11L1M optocoupler isolator, one end of resistor R2, one end of resistor R3, pin 4 and pin 8 of the NE555 time base integrated circuit and micro The positive power supply terminal of the processor;

Pin 1 of the TMP03 temperature sensor is connected to pin 2 of the H11L1M optocoupler isolator, pin 1 of the H11L1M optocoupler isolator is connected to the other end of the resistor R1, and pin 4 of the H11L1M optocoupler isolator is connected to the other end of the resistor R2 and comparator A1 The inverting input terminal of the comparator A1 is connected to a fixed terminal of the sliding rheostat Rp1, the output terminal of the comparator A1 is connected to the 2 pin of the NE555 time base integrated circuit, and the 7 pin of the NE555 time base integrated circuit is connected to itself 6 pin, the other end of resistor R3 and the positive pole of electrolytic capacitor C1; pin 5 of the NE555 time base integrated circuit is connected to one end of capacitor C2; pin 3 of the NE555 time base integrated circuit is simultaneously connected to the anode of the light-emitting diode LED and the temperature of the microprocessor. limit signal input;

The ground terminal of the power supply of the microprocessor is connected to the cathode of the light-emitting diode LED, pin 1 of the NE555 time base integrated circuit, the other end of the capacitor C2, the negative electrode of the electrolytic capacitor C1, the other fixed end of the sliding rheostat Rp1 and its movable end, H11L1M Pin 5 of the optocoupler isolator and pin 3 of the TMP03 temperature sensor are grounded.

The utility model has the advantages: the structure of the thermal alarm anti-stealing device described in the utility model is simple. When the stealing behavior occurs, it will cause abnormal heat. When the temperature detected by TMP03 is higher than the given temperature, the LED light is on, indicating the When the temperature is abnormal, at the same time, the microprocessor gets a high level as a trigger command to drive the SMS module to send a text message to the designated mobile terminal, so that the administrator can know which community user is abnormal at the first time, so as to grasp the first-hand information and deal with power theft in time Behavior. And effectively avoid the fire caused by abnormal heating of the line.

Description of drawings

Fig. 1 is a structural schematic diagram of the thermal alarm anti-stealing device of the present invention.

Detailed ways

Specific embodiment one: the present embodiment is described below in conjunction with Fig. 1, and the thermal alarm anti-stealing device described in the present embodiment includes a microprocessor 1, an SMS module 2 and a temperature overrun detection unit 3; a temperature overrun detection unit The temperature overrun signal output end of 3 is connected with the temperature overrun signal input end of microprocessor 1, and the command output end of microprocessor 1 is connected with the command input end of SMS module 2, and SMS module 2 sends the temperature overrun signal of the watt-hour meter The limit information is sent to the designated mobile terminal through the antenna in the form of a short message; the +6V DC power supply supplies power to the microprocessor 1 and the temperature overrun detection unit 3 at the same time;

Temperature overrun detection unit 3 includes NE555 time base integrated circuit, TMP03 temperature sensor, H11L1M optocoupler isolator, comparator A1, resistor R1, resistor R2, resistor R3, sliding rheostat Rp1, electrolytic capacitor C1, capacitor C2 and light-emitting diode LED ;

The +6V DC power supply is simultaneously connected to pin 2 of the TMP03 temperature sensor, one end of resistor R1, pin 6 of the H11L1M optocoupler isolator, one end of resistor R2, one end of resistor R3, pin 4 and pin 8 of the NE555 time base integrated circuit and micro The positive power supply terminal of processor 1;

Pin 1 of the TMP03 temperature sensor is connected to pin 2 of the H11L1M optocoupler isolator, pin 1 of the H11L1M optocoupler isolator is connected to the other end of the resistor R1, and pin 4 of the H11L1M optocoupler isolator is connected to the other end of the resistor R2 and comparator A1 The inverting input terminal of the comparator A1 is connected to a fixed terminal of the sliding rheostat Rp1, the output terminal of the comparator A1 is connected to the 2 pin of the NE555 time base integrated circuit, and the 7 pin of the NE555 time base integrated circuit is connected to itself 6 pin, the other end of resistor R3 and the positive pole of electrolytic capacitor C1; pin 5 of the NE555 time base integrated circuit is connected to one end of capacitor C2; pin 3 of the NE555 time base integrated circuit is connected to the anode of the light-emitting diode LED and the temperature of the microprocessor 1 at the same time Overrun signal input terminal;

The power ground terminal of the microprocessor 1 is simultaneously connected to the cathode of the light-emitting diode LED, pin 1 of the NE555 time-base integrated circuit, the other end of the capacitor C2, the negative electrode of the electrolytic capacitor C1, the other fixed end of the sliding rheostat Rp1 and its movable end, Pin 5 of the H11L1M optocoupler isolator and pin 3 of the TMP03 temperature sensor are grounded.

The SMS module 2 is realized by a chip of the type TC351.

Working principle: When the watt-hour meter placed in the metering box works normally and there is no electricity stealing behavior, the temperature signal collected by TMP03 is normal. When the temperature is lower than the given temperature, A1 outputs high level, and the NE555 time base Pin 2 is high level, the monostable trigger is in a stable state, pin 3 of the NE555 time base integrated circuit outputs low level, and the LED light is off. At the same time, microprocessor 1 does not receive instructions and does not drive SMS module 2 to send Short message.

If the abnormal heat is caused by stealing electricity, when the temperature detected by TMP03 is higher than the given temperature, the comparator A1 outputs a low level, that is, a low level trigger signal is input to pin 2 of the NE555 time base integrated circuit, and the monostable The state trigger flips and enters the transient state, pin 3 of the NE555 time base integrated circuit outputs a high level, and the LED light is on, indicating that the current temperature is abnormal. Designate the mobile phone terminal, so that the administrator can know at the first time which cell user is abnormal, so as to grasp the first-hand information and deal with the electricity theft in time.

The given temperature is achieved by adjusting Rp1.

Utilize microprocessor 1 and SMS module 2 to carry out short message output and relate to hardware and related program all are prior art, can directly buy on the market, is not the focus of protection of the utility model, and the utility model utilizes this prior art to carry out Remote alarm.

Claims (2)

1. hotness alarm device for avoiding fraudulent using electric, is characterized in that, it comprises microprocessor (1), SMS module (2) and temperature over-range detecting unit (3); The temperature over-range signal output part of temperature over-range detecting unit (3) is connected with the temperature over-range signal input part of microprocessor (1), the instruction output end of microprocessor (1) is connected with the command input of SMS module (2), and the temperature over-range information of watt-hour meter is sent to designated mobile phone terminal with note form by antenna by SMS module (2); + 6V direct supply is microprocessor (1) and temperature over-range detecting unit (3) power supply simultaneously;

Temperature over-range detecting unit (3) comprises NE555 time-base integrated circuit, TMP03 temperature sensor, H11L1M optical coupling isolator, comparer A1, resistance R1, resistance R2, resistance R3, slide rheostat Rp1, electrochemical capacitor C1, electric capacity C2 and LED;

+ 6V direct supply connects the positive pole power supply terminal of 2 pin of TMP03 temperature sensor, one end of resistance R1,6 pin of H11L1M optical coupling isolator, one end of resistance R2, one end of resistance R3,4 pin of NE555 time-base integrated circuit, 8 pin and microprocessor (1) simultaneously;

1 pin of TMP03 temperature sensor connects 2 pin of H11L1M optical coupling isolator, the other end of 1 pin contact resistance R1 of H11L1M optical coupling isolator, the 4 pin other end of contact resistance R2 and the inverting input of comparer A1 simultaneously of H11L1M optical coupling isolator, the in-phase input end of comparer A1 connects a stiff end of slide rheostat Rp1, the output terminal of comparer A1 connects 2 pin of NE555 time-base integrated circuit, and 7 pin of NE555 time-base integrated circuit connect self 6 pin, the other end of resistance R3 and the positive pole of electrochemical capacitor C1 simultaneously; 5 pin of NE555 time-base integrated circuit connect one end of electric capacity C2; The 3 pin anode of connecting luminous diode LED and the temperature over-range signal input part of microprocessor (1) simultaneously of NE555 time-base integrated circuit;

The power supply ground end of microprocessor (1) is the other end of 1 pin of the negative electrode of connecting luminous diode LED, NE555 time-base integrated circuit, electric capacity C2, the negative pole of electrochemical capacitor C1, another stiff end of slide rheostat Rp1 and movable end, 5 pin of H11L1M optical coupling isolator and 3 pin of TMP03 temperature sensor simultaneously, and ground connection.

2. hotness alarm device for avoiding fraudulent using electric according to claim 1, is characterized in that, SMS module (2) adopts model to be that the chip of TC351 realizes.