CN203250382U - Power supply voltage detection and protection system - Google Patents

Abstract

The utility model relates to a power supply voltage detection and protection system, comprising a power supply voltage detection circuit, an A/D data conversion circuit, a central processing unit circuit and a ZigBee wireless alarm module circuit, the output signal of the power supply voltage detection circuit is passed through the A/D The data conversion circuit is transmitted to the central processor circuit, and the output signal of the central processor circuit is sent to the ZigBee wireless alarm module circuit. The utility model adopts the power supply voltage detection circuit to collect the overvoltage or undervoltage signal of the mains voltage, and the central processing After the identification of the device circuit, the alarm information is sent to the alarm center through the ZigBee wireless alarm module circuit to detect the early situation of the fire, timely alarm to reduce the occurrence of fire, and realize the cellular transmission of alarm information, which has the advantages of low cost, strong practicability, and simple networking. .

Description

Power supply voltage detection and protection system

technical field

The utility model relates to a protection system, in particular to a power supply voltage detection and protection system.

Background technique

Electrical fires account for more than 30% of the total number of fires, causing direct and huge losses to people. Electrical fires account for a relatively large proportion of electrical fire accidents caused by overvoltage or undervoltage due to zero break, so it is very important to monitor the power supply voltage.

Utility model content

The purpose of the utility model is to provide a power supply voltage detection and protection system.

The technical solution adopted by the utility model to solve its technical problems is: a power supply voltage detection and protection system, including a power supply voltage detection circuit, an A/D data conversion circuit, a central processing unit circuit and a ZigBee wireless alarm module circuit, the power supply voltage detection The output signal of the circuit is transmitted to the central processor circuit through the A/D data conversion circuit, and the output signal of the central processor circuit is sent to the ZigBee wireless alarm module circuit.

The power supply voltage detection circuit is composed of live wire L and neutral wire N to form an AC220V AC voltage loop, and its output signal is stepped down by capacitor C1, divided by resistor R1, rectified by diode D1, and filtered by capacitor C2 to output a voltage signal.

The central processing unit circuit adopts 2051 single-chip microcomputer U1.

The ZigBee wireless alarm module circuit adopts ZM2410 wireless alarm module U3.

By adopting the above-mentioned technical scheme, the beneficial effects of the utility model are: the utility model adopts the power supply voltage detection circuit to collect the overvoltage or undervoltage signal of the mains voltage, and after being identified by the central processing unit circuit, the ZigBee wireless alarm module circuit sends The alarm center sends out alarm information, detects the early stage of fire, timely alarms to reduce the occurrence of fire, and realizes cellular transmission of alarm information, which has the advantages of low cost, strong practicability, and simple networking.

Description of drawings

Fig. 1 is a block diagram of the utility model;

Fig. 2 is the schematic circuit diagram of the utility model.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1 and Figure 2, the power supply voltage detection and protection system of the present utility model includes a power supply voltage detection circuit, an A/D data conversion circuit, a central processing unit circuit and a ZigBee wireless alarm module circuit, and the power supply voltage detection circuit The output signal of the A/D data conversion circuit is transmitted to the central processing unit circuit, and the output signal of the central processing unit circuit is sent to the ZigBee wireless alarm module circuit.

The power supply voltage detection circuit is composed of the live wire L and the neutral wire N to form an AC220V AC voltage loop, and its output signal is stepped down by the capacitor C1, divided by the resistor R1, rectified by the diode D1, and filtered by the capacitor C2 to output a voltage signal, and the voltage signal is input to The 2nd pin of the A/D data conversion module U2, the 5th, 6th and 7th pins of the A/D data conversion module U2 and the 16th, 18th and 19th pins of the 2051 single-chip microcomputer U1 form a data communication circuit, which is converted by the A/D data After the internal A/D data conversion of the module U2, the power supply voltage signal is collected.

When the mains voltage reaches 290V, it is rectified and filtered by capacitor C1, resistor R1, diode D1, and capacitor C2 for voltage processing, and then input to A/D data conversion module U2 for A/D data conversion, which is read by 2051 single-chip microcomputer U1 Take the current data signal of the current A/D data conversion module U2, and after being recognized by the 2051 single-chip microcomputer U1, it is judged as overvoltage, and the ZigBee wireless signal is composed of the 6th and 7th terminals of the ZM2410 wireless alarm module U3 and the 2nd and 3rd terminals of the 2051 single-chip microcomputer U1. Alarm module circuit, ZM2410 wireless alarm module U3 is a built-in 2.4GHZ Zigbee embedded serial port transparent transmission (point-to-multipoint and point-to-multipoint) communication protocol, supports air upgrade firmware or configuration of remote module information, up to 7dBm power output and - The receiving sensitivity of 100dBm can satisfy long-distance communication, send alarm information to the data center, and realize cellular transmission of alarm information.

When the mains voltage reaches 150V, the current data signal of the current A/D data conversion module U2 is read by the 2051 single-chip microcomputer U1. After being recognized by the 2051 single-chip microcomputer U1, it is judged as undervoltage, and the 2051 single-chip microcomputer U1 sends an AT command to the ZM2410 wireless alarm Module U3 realizes wireless data transmission and reception, switches pins in the direction of RS-485, sends alarm information to the data center, realizes cellular transmission of alarm information, detects early fire conditions, and timely alarms to reduce fire occurrences. It has low cost and strong practicability. Simple networking and other advantages.

The above is only a preferred embodiment of the utility model, and can not limit the scope of the utility model implementation. All equal changes and decorations made according to the patent scope of the utility model should still belong to the scope of the utility model. within range.

Claims (4)

1. supply voltage detects protection system; it is characterized in that: include voltage detection circuit, A/D data converting circuit, central processing unit circuit and ZigBee Wireless alarm module circuit; the output signal of described voltage detection circuit is transferred to the central processing unit circuit through the A/D data converting circuit, and the output signal of described central processing unit circuit is sent to ZigBee Wireless alarm module circuit.

2. supply voltage according to claim 1 detects protection system; it is characterized in that: described voltage detection circuit consists of the AC220V ac voltage circuit by live wire L, zero line N; its output signal is through capacitor C 1 step-down, resistance R 1 dividing potential drop, output voltage signal after diode D1 rectification, capacitor C 2 filtering.

3. supply voltage according to claim 1 detects protection system, and it is characterized in that: described central processing unit circuit adopts 2051 single-chip microcomputer U1.

4. supply voltage according to claim 1 detects protection system, it is characterized in that: described ZigBee Wireless alarm module circuit adopts ZM2410 Wireless alarm module U3.

Images