CN204408003U - Remote-control intelligent gas meter concentrator power supply detects and commutation circuit in real time - Google Patents

Abstract

The utility model discloses a remote control intelligent gas meter concentrator power supply real-time detection and switching circuit, which comprises an automatic voltage detection and switching circuit, a main power supply voltage detection circuit, a backup power supply voltage detection circuit, a first reverse cut-off circuit, a second Two reverse cut-off circuits and the main control MCU, the two output terminals of the automatic voltage detection and switching circuit are respectively connected with the second reverse cut-off circuit and the backup power supply voltage detection circuit, and the external main power supply is respectively connected with the main power supply voltage detection circuit It is connected with the first reverse cut-off circuit, and the output ends of the main power supply voltage detection circuit, the first reverse cut-off circuit, the second reverse cut-off circuit and the standby power supply voltage detection circuit are all connected with the main control MCU. The utility model realizes the power supply detection of the main power supply and the backup power supply, realizes the seamless switching of hardware, and detects the state of the power supply circuit in real time through the main power supply and the backup power supply voltage detection circuit, and actively reports its state through the main control MCU, so as to realize the safe power supply of the equipment.

Description

Remote control intelligent gas meter concentrator power supply real-time detection and switching circuit

technical field

The utility model relates to a remote control intelligent gas meter concentrator power supply real-time detection and switching circuit.

Background technique

A concentrator device is a central connection point device for connecting terminals, computers or communication devices. In a number of terminal-intensive areas, usually in order to reduce communication lines, the terminal is first connected to the concentrator, and then the concentrator is connected to the communication controller of the computer through a high-speed line. Therefore, the concentrator is also the best way to share lines and improve line utilization. An effective device. However, the existing concentrators for remote control of smart gas meters do not have the function of backup power supply; even if there is a function of backup power supply, the seamless switching of hardware cannot be realized, and the status of the power supply circuit cannot be monitored in real time. .

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art, and provide a real-time detection and switching circuit of the remote control intelligent gas meter concentrator power supply, which has the advantages of fast switching time and seamless delay.

The purpose of this utility model is achieved through the following technical solutions: remote control intelligent gas meter concentrator power supply real-time detection and switching circuit, which includes automatic voltage detection and switching circuit, main power supply voltage detection circuit, backup power supply voltage detection circuit, the first A reverse cut-off circuit, a second reverse cut-off circuit and the main control MCU, the two input terminals of the automatic voltage detection and switching circuit are respectively connected with the external main power supply and the external backup power supply, and the automatic voltage detection and switching The two output ends of the circuit are respectively connected with the second reverse cut-off circuit and the standby power supply voltage detection circuit, and the external main power supply is also respectively connected with the main power supply voltage detection circuit and the first reverse cut-off circuit, the main power supply voltage detection circuit, the first The output terminals of the reverse cut-off circuit, the second reverse cut-off circuit and the standby power supply voltage detection circuit are all connected to the main control MCU, and the output ends of the first reverse cut-off circuit and the second reverse cut-off circuit are also used for power supply output.

The model of the main control MCU is MSP430.

The external backup power supply is a dry battery.

The beneficial effects of the utility model are: (1) The utility model realizes the power supply detection of the main power supply and the backup power supply through the automatic voltage detection and switching circuit, and realizes the seamless switching of the hardware, and has the advantages of fast switching time and seamless delay; (2) ) The utility model detects the state of the power supply circuit in real time through the voltage detection circuit of the main power supply and the backup power supply, and actively reports its state through the main control MCU, so as to realize the safe power supply of the equipment.

Description of drawings

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

Detailed ways

The technical solution of the utility model is further described in detail below in conjunction with the accompanying drawings: as shown in Figure 1, the real-time detection and switching circuit of the power supply of the remote control intelligent gas meter concentrator includes an automatic voltage detection and switching circuit, a main power supply voltage detection circuit, a standby The power supply voltage detection circuit, the first reverse cut-off circuit, the second reverse cut-off circuit and the main control MCU, the two input terminals of the automatic voltage detection and switching circuit are respectively connected with the external main power supply and the external backup power supply, and the The two output terminals of the automatic voltage detection and switching circuit are respectively connected with the second reverse cut-off circuit and the backup power supply voltage detection circuit, and the external main power supply is also connected with the main power supply voltage detection circuit and the first reverse cut-off circuit respectively, and the main power supply The output ends of the voltage detection circuit, the first reverse cut-off circuit, the second reverse cut-off circuit and the standby power supply voltage detection circuit are all connected to the main control MCU, and the output ends of the first reverse cut-off circuit and the second reverse cut-off circuit are also connected to the main control MCU. For power output.

The automatic voltage detection and switching circuit is used to detect the voltage of the main power supply and the backup power supply, and select the power supply according to the voltage situation: when the main power supply has power, it will automatically switch to the main power supply; when the main power supply is powered off, it will automatically switch to the backup power supply. Power supply; when the main power supply is powered on, it will automatically switch to the main power supply.

The main power supply voltage detection circuit and the backup power supply detection circuit are respectively used to detect the voltages on the power supply circuits of the main power supply and the backup power supply and transmit them to the main control MCU.

The main control MCU gives the current power supply circuit working state indication according to the main power supply voltage detection signal sent by the main power supply voltage detection circuit and the backup power supply voltage detection signal sent by the backup power supply voltage detection circuit:

(1) When it is detected that the main power supply is powered, if the output voltage of the backup power voltage detection circuit is similar to the output voltage of the main power voltage detection circuit, it will cause the main power supply to the backup power supply, the second reverse cut-off circuit Abnormal, the MCU gives an indication of the abnormal working state of the second inverting control circuit;

(2) When the main power supply is detected, if the output voltage of the backup power voltage detection circuit is the normal detection voltage of the backup power supply, the automatic voltage detection and switching circuit is abnormal, and the MCU will give an indication of the abnormal working status of the automatic voltage detection and switching circuit ;

(3) When the standby power supply is detected, if it is detected that the output voltage of the main power supply voltage detection circuit is similar to the output voltage of the backup power supply voltage detection circuit, it will cause the backup power supply to the main power supply, then the first reverse The cut-off circuit is abnormal, and the MCU gives an indication of the abnormal working state of the first reverse cut-off circuit.

The model of the main control MCU is MSP430.

The external backup power supply is a dry battery.

Claims (3)

1. remote-control intelligent gas meter concentrator power supply detects and commutation circuit in real time, it is characterized in that: it comprises automatic voltage and detects and commutation circuit, main power voltage testing circuit, backup power source voltage testing circuit, first reverse cut-off circuit, second reverse cut-off circuit and main control MCU, described automatic voltage detects and is connected with outside main power source and outside stand-by power supply respectively with two inputs of commutation circuit, described automatic voltage detects with two outputs of commutation circuit that cut-off circuit reverse with second and backup power source voltage testing circuit are connected respectively, outside main power source is also connected with main power voltage testing circuit and the first reverse cut-off circuit respectively, main power voltage testing circuit, first reverse cut-off circuit, second reverse cut-off circuit is all connected with main control MCU with the output of backup power source voltage testing circuit, the output of the first reverse cut-off circuit and the second reverse cut-off circuit also exports for power supply, described main control MCU is also connected with operate outside monitoring module.

2. remote-control intelligent gas meter concentrator power supply according to claim 1 detects and commutation circuit in real time, it is characterized in that: the model of described main control MCU is MSP430.

3. remote-control intelligent gas meter concentrator power supply according to claim 1 detects and commutation circuit in real time, it is characterized in that: described outside stand-by power supply is dry cell.