CN-115912887-B - Wireless control low-power-consumption power supply starting circuit and starting method

CN115912887BCN 115912887 BCN115912887 BCN 115912887BCN-115912887-B

Abstract

The invention relates to a wireless control low-power-consumption power supply starting circuit which comprises a signal receiving module, a voltage generating module, a decoding module and a load driving module, wherein the signal receiving module is responsible for outputting low levels of different time lengths according to the length of received network information, the voltage generating module is connected with the signal receiving module and outputs corresponding voltages according to the time lengths of the low levels output by the signal receiving module, the decoding module is responsible for generating signals according to the voltage of the received voltage generating module so as to start a power supply to supply power to a load, and the load driving module is responsible for receiving the signals of the decoding module so as to start or disconnect the load power supply. The invention adopts different output pins of the decoder to control different load power supplies to be turned on and off, so that the starting of each load power supply has no interference to the power supply of the load. In addition, because the MCU which needs to burn a larger program is not involved, the energy loss brought by the MCU running the program can be reduced, and the system power consumption is further reduced.

Inventors

ZHANG WENXIAN
CAI XIAOYONG
HAN JINGYU
LIU JIAN
LI ZHIGUANG
Hong Jiaxi

Assignees

沈阳铁路信号有限责任公司

Dates

Publication Date: 20260508
Application Date: 20221128

Claims (5)

1. The wireless control low-power consumption power supply starting circuit is characterized by comprising a signal receiving module, a voltage generating module, a decoding module and a load driving module; the signal receiving module is in charge of receiving network information sent by the main equipment, and outputting low levels with different time lengths according to the length of the received network information after receiving the network information; the voltage generation module is connected with the signal receiving module, outputs corresponding voltage according to the low-level time length output by the signal receiving module, and transmits the voltage to the decoding module; The decoding module is in charge of receiving the voltage of the voltage generating module, and generating a signal according to the voltage so as to start a power supply to supply power to a corresponding load; the load driving module is responsible for receiving the signal of the decoding module and starting or disconnecting the load power supply according to the signal; The voltage generation module comprises a PNP triode Q3, an emitter of the triode Q3 is connected with a power supply, a collector of the triode Q3 is grounded through a resistor R3 and a capacitor C1 in sequence, and a base of the triode Q3 is connected with an output end of the signal receiving module; the decoding module comprises double-limit voltage comparators D1, D2 and D3, wherein the connection point of the capacitor C1 and the resistor R3 is connected with the input ends of three paths of double-limit voltage comparators D1, D2 and D3, and the threshold values of the double-limit voltage comparators D1, D2 and D3 are respectively set to be more than 2.5V, 1V-2.5V and 0-1V; The outputs of the double-limit voltage comparators D1, D2 and D3 are respectively connected with the input end of the decoder through the D triggers U1, U3 and U5, and the output ends of the decoder are connected with load power supplies; The decoder is a 74HC138 decoder.
2. The wireless controlled low power consumption power supply starting circuit according to claim 1, wherein the load driving module comprises PNP type triodes Q1 and Q2, NPN type triodes Q4 and NOT gate U4; The input end of the NOT gate U4 is connected with the output end of the decoder, the output end of the NOT gate U4 is connected with the input end of the D trigger U2, and the output end of the D trigger U2 is connected with the base electrode of the triode Q1; A resistor R1 is connected between the emitter and the base of the triode Q2, the base of the triode Q2 is grounded through a resistor R14, the collector of the triode Q1 is connected with the base of the triode Q2, and the collector of the triode Q2 is grounded through resistors R2 and R5 in sequence; the collector of the triode Q4 is connected with the collector of the triode Q1, the emitter of the triode Q4 is grounded through a resistor R6, and the output end of the NOT gate U4 is connected with the base of the triode Q4 through a diode D3 and a resistor R4 which can be conducted forward; the connection point of the diode D3 and the resistor R4 is connected with the connection point of the resistor R2 and the resistor R5; the collector of the triode Q2 is grounded through a load.
3. The wireless-controlled low-power-consumption power starting circuit according to claim 2, wherein the output ends of the double-limit voltage comparators D1, D2 and D3 are grounded through resistors R10, R11 and R12, respectively, and the output ends of the D flip-flops U1, U3 and U5 are grounded through resistors R9, R8 and R7, respectively.
4. A wireless control low-power consumption power supply starting method is characterized by comprising the following steps: The method comprises the steps that a signal reading module monitors network information of a wake-up low-power-consumption power supply sent by a main device, and obtains the duration of a signal from the network information; The second step, the signal reading module sends low level to the voltage generating module, the duration of the low level is proportional to the duration of the signal, the PNP triode Q3 in the voltage generating module is conducted to charge the capacitor C1, and the voltage of the capacitor C1 is transmitted to the input ends of the three double-limit voltage comparators D1, D2 and D3; Thirdly, utilizing three double-limit voltage comparators D1, D2 and D3 in the decoding module to conduct corresponding D triggers according to voltage values output by the three double-limit voltage comparators D1, D2 and D3, and enabling the conducted D trigger counter to be +1; Fourthly, when the count of the serial D trigger counter is equal to 3, the serial D trigger counter outputs a low level to an EN pin of the 74HC138 decoder, and meanwhile, the serial D trigger counter returns to zero; And fifthly, the low level is turned to the high level through the NOT gate, a certain pin of the 74HC138 decoder is conducted for odd times to supply power for a load of the self-locking circuit, so that the low-power-consumption power supply starting without MCU wireless control is realized, and the shutdown function can be realized after the pin of the 74HC138 decoder is conducted again for even times.
5. The method for starting up a power supply with low power consumption under wireless control as claimed in claim 4, wherein the voltage values outputted by the three double-limit voltage comparators D1, D2 and D3 are used for conducting the corresponding D trigger, the threshold value of the double-limit voltage comparator D1 is set to be more than 2.5V, the threshold value of the double-limit voltage comparator D2 is set to be 1V-2.5V, and the threshold value of the double-limit voltage comparator D3 is set to be 0V-1V; When the voltage value input to the three double-limit voltage comparators is greater than 2.5V, the D trigger U1 is conducted, when the voltage value input to the three double-limit voltage comparators is between 1V and 2.5V, the D trigger U3 is conducted, and when the voltage value input to the three double-limit voltage comparators is between 0V and 1V, the D trigger U5 is conducted.

Description

Wireless control low-power-consumption power supply starting circuit and starting method Technical Field The invention relates to a wireless control low-power-consumption power output technology, in particular to a wireless control low-power-consumption power starting circuit and a starting method. Background The intelligent urban traffic concept is more and more popular among scholars, and sensors distributed throughout the city can greatly facilitate people to travel and live. The large number of sensors placed uses wireless communication to communicate information with each other, and typically these devices have a short life due to size and battery capacity limitations, thus requiring strict management of the power supply. Today, most smart city nodes communicate wirelessly over various links, such as IEEE 802.15.4, IEEE 802.15.4g, IEEE802.11 (Bluetooth), and low power 802.11. Radio wakeup technology (MuR) is currently a promising approach for low power wireless communication that enables a purely asynchronous, on-demand communication mechanism while significantly reducing unnecessary energy waste. By connecting the secondary ultra low power receiver to the wireless device, the master MCU (Microcontroller Unit) can switch it to the lowest power mode, when the slave is in listening state. The master device is re-activated when it sends a special Radio Frequency (RF) signal to the slave device creating an interrupt. At present, for low-power consumption radio equipment needing to burn a larger program, because radio frequency signals sent by nodes cannot be identified, a programmable load switch circuit based on an MCU is mostly adopted to receive and judge radio frequency signals of waking up or dormancy. The MCU is used for address decoding and interference filtering, monitoring and decoding radio frequency signals after signal rectification and amplification, and notifying the main node through interruption. This additional MCU hardware intervention can introduce additional energy overhead. For low power radio devices that do not require programming control, a correlator circuit may be used for matching the radio frequency signals without using MCU decoding. In the correlator circuit, the node address is stored in a reference signal buffer, and the input bits of the radio frequency signal are associated with the reference signal. When a new byte is available, all samples are shifted one bit back in the correlator and compared to the pre-stored sample if the stored bit matches the input bit. The wake-up interrupt pin is turned on. The MCU is not used, so that the energy consumption can be reduced, but the node cannot be actively controlled to enter the sleep state again after being awakened. In addition, when devices use the same channel or radio frequency to transmit and receive signals, interfering signals may falsely wake up the node, resulting in unnecessary security concerns. Disclosure of Invention Aiming at the defects existing in the prior art, the invention provides a wireless control low-power-consumption power supply starting circuit and a starting method; The technical scheme of the invention is as follows: A wireless control low-power consumption power supply starting circuit comprises a signal receiving module, a voltage generating module, a decoding module and a load driving module, wherein the signal receiving module is used for receiving network information sent by a main device, outputting low levels of different time periods according to the length of the received network information after receiving the network information, the voltage generating module is connected with the signal receiving module, outputting corresponding voltage according to the time periods of the low levels output by the signal receiving module and transmitting the voltage to the decoding module, the decoding module is used for receiving the voltage of the voltage generating module, generating a signal according to the voltage to start a power supply to supply power to a corresponding load, and the load driving module is used for receiving the signal of the decoding module and starting or disconnecting the load power supply according to the signal. Further, the voltage generation module comprises a PNP type triode Q3, an emitter of the triode Q3 is connected with a power supply, a collector of the triode Q3 is grounded through resistors R3 and C1 in sequence, and a base of the triode Q3 is connected with an output end of the signal receiving module. Further, the decoding module comprises double-limit voltage comparators D1, D2 and D3, connection points of capacitors C1 and R3 are connected with input ends of three paths of double-limit voltage comparators D1, D2 and D3, threshold values of the double-limit voltage comparators D1, D2 and D3 are respectively set to be more than 2.5V, 1V-2.5V and 0-1V, outputs of the double-limit voltage comparators D1, D2 and D3 are respectively connected with input ends of a decod