CN209844627U

CN209844627U - Novel charging management circuit of independent feedback monitoring device

Info

Publication number: CN209844627U
Application number: CN201920065667.8U
Authority: CN
Inventors: 胡进; 郑月明; 徐仁杰; 赵强
Original assignee: ZHEJIANG DABANG TECHNOLOGY CO LTD
Current assignee: ZHEJIANG DABANG TECHNOLOGY CO LTD; Zhejiang Dabong Tech Co Ltd
Priority date: 2019-01-15
Filing date: 2019-01-15
Publication date: 2019-12-24
Anticipated expiration: 2029-01-15

Abstract

The utility model discloses a novel charging management circuit of independent feedback monitoring device, including feedback control module, electric capacity C31, electric capacity C32, electric capacity C33, inductance L31, inductance L32, diode D31, switch Q31, sampling resistance R31 of the module of charging; two ends of the capacitor C31 are used as input ends, and the other end of the inductor L31 is connected with one end of the switch Q31 and one end of the capacitor C32; the other end of the capacitor C32 is connected with one end of the inductor L32 and the anode of the diode D31; the other end of the resistor R32 is connected with the feedback control module and one end of the resistor R33; the other end of the capacitor C31 is connected with the cathode of the input end, the other end of the switch Q31, the other end of the inductor L32, the other end of the capacitor C33 and one end of the sampling resistor R31, and the other end of the sampling resistor R31 and one end of the feedback control module are used as the cathode of the output end together. One end of the capacitor C33 is used as an anode of the output; the utility model provides a stand alone type feedback monitoring devices's novel charging management circuit for super capacitor charges.

Description

Novel charging management circuit of independent feedback monitoring device

Technical Field

The utility model relates to the field of electronic technology, more specifically the utility model relates to a novel charging management circuit of stand alone type feedback monitoring devices that says so.

Background

The development of the internet of things promotes the application of intelligent control. In a large number of applications, the internet of things at least comprises a control terminal and a plurality of terminal devices. Common control terminals are devices such as mobile phones, servers, computers, handsets and the like and matched software thereof, common terminal devices such as sensors or controllers are often communicated in wired, wireless or power line carrier communication modes. In many applications, terminal devices are powered by a power grid, such as a remote street lamp controller in a lighting system, a remote controller of traffic signals, a remote sensor of industrial equipment, a remote video monitoring device and the like.

In the application of the internet of things with large-scale terminals, under the condition of normal use, general equipment cannot be suddenly damaged in a large scale, and if the terminal equipment cannot inform the control end of state information in time when a mains supply line is powered off, the control end generally considers that the state of the terminal equipment has at least two possibilities: one is a power failure of the mains line, and the other is a communication abnormality. Under the condition of not increasing other judgment conditions, the two possibilities are difficult to distinguish reliably, but if the two possibilities are not processed, the overall performance of the Internet of things system is greatly influenced.

In order to solve the problem, a simple method is to add an energy storage device in a power supply circuit of the terminal, charge the energy storage device under the condition that a mains supply line is powered on, and utilize the energy storage device to supply power to the terminal equipment under the condition that the mains supply line is powered off, so that the terminal equipment can still communicate with the control end, and at least the condition that the power-off state of the line can be informed to the control end is guaranteed.

In this case, a battery or a super capacitor is a common solution for the energy storage device. However, batteries have a life problem in many applications, particularly outdoor applications such as road lighting, where the battery is charged and discharged every day due to the fact that the lights are switched on and off by switching on and off the circuit every day, which leads to a rapid reduction in the life of the battery. Supercapacitors therefore seem to be a better solution to avoid lifetime problems.

However, under the current technical conditions, the energy density of the super capacitor is lower than that of common batteries such as lithium batteries, and the volume and the cost are often larger in order to store the same energy. The terminal applied to the internet of things is usually required to be small in size and low in cost. At this time, the two conflict. Therefore, in the market, a reasonable charge and discharge management scheme and a power utilization strategy for saving power of the terminal equipment need to be designed to relieve the contradiction.

Disclosure of Invention

The utility model overcomes prior art's is not enough, provides the novel charging management circuit of stand alone type feedback monitoring devices who charges for super capacitor.

The technical scheme of the utility model as follows:

the novel charging management circuit of the independent feedback monitoring device comprises a feedback control module of a charging module, a capacitor C31, a capacitor C32, a capacitor C33, an inductor L31, an inductor L32, a diode D31, a switch Q31 and a sampling resistor R31; two ends of the capacitor C31 are used as input ends, and one end of the capacitor C31 is connected with the anode of the input end, one end of the inductor L31 and one end of the feedback control module; the other end of the inductor L31 is connected to one end of the switch Q31 and one end of the capacitor C32; the other end of the capacitor C32 is connected with one end of the inductor L32 and the anode of the diode D31; the cathode of the diode D31 is connected to one end of the capacitor C33 and one end of the resistor R32; the other end of the resistor R32 is connected with the feedback control module and one end of the resistor R33; the other end of the capacitor C31 is connected with the cathode of the input end, the other end of the switch Q31, the other end of the inductor L32, the other end of the capacitor C33 and one end of the sampling resistor R31, and the other end of the sampling resistor R31 and one end of the feedback control module are used as the cathode of the output end together. One end of the capacitor C33 serves as an anode of the output.

Furthermore, the feedback control module comprises a single chip processor, two operational amplifiers, 11 resistors, two capacitors, two diodes and a photoelectric coupler. The single chip microcomputer processor U31, the operational amplifier U32 and the operational amplifier U33; the 11 resistors are respectively a resistor R32, a resistor R33, a resistor R34, a resistor R35, a resistor R36, a resistor R37, a resistor R38, a resistor R39, a resistor R310, a resistor R311 and a resistor R312; the two capacitors comprise a capacitor C34 and a capacitor C35; the two diodes are respectively a diode D32 and a diode D33;

the singlechip microcomputer processor U31 is connected with one end of the resistor R312, the photoelectric coupler, one end of the resistor R310, one end of the resistor R311, one end of the resistor R36 and one end of the resistor R37; the other end of the resistor R312 is connected with a photoelectric coupler, and one end of the photoelectric coupler is connected with the anode of the diode D32 and the anode of the diode D33; the cathode of the diode D32 is connected with one end of the capacitor C34 and the operational amplifier U32; the other end of the capacitor C34 is connected with one end of a resistor R35; the other end of the resistor R35 is connected with one end of a resistor R34 and an operational amplifier U32, and the other end of the resistor R34 is connected with the other end of a resistor R32 and one end of a resistor R33; one end of the operational amplifier U32 is connected with the other end of the resistor R36; the cathode of the diode D33 is connected with one end of the capacitor C35 and the operational amplifier U33; the other end of the capacitor C35 is connected with one end of a resistor R39; the other end of the resistor R39 is connected with one end of a resistor R38 and the operational amplifier U33, and the other end of the resistor R38 is connected with one end of a resistor R31; one end of the operational amplifier U33 is connected to the other end of the resistor R310, and the other end of the resistor R311 is grounded.

The utility model discloses a simple circuit structure for manage the less capacious super capacitor, nevertheless can be as long as possible the requirement of satisfying the terminal power consumption, with guarantee that the terminal can send the control end with circuit outage state. The utility model has the advantages of wide applicability, low cost and easy popularization and application.

Drawings

FIG. 1 is a schematic circuit diagram of the apparatus of the present invention;

FIG. 2 is a circuit diagram of a charge management module according to the present invention;

FIG. 3 is a circuit diagram of another charge management module according to the present invention;

FIG. 4 is a circuit diagram of a discharge management module according to the present invention;

FIG. 5 is a circuit diagram of the super capacitor of the present invention for fast discharge;

FIG. 6 is a flow chart of a strategy for rapid discharge of a super capacitor according to the present invention;

FIG. 7 is a flow chart of another strategy for rapid discharge of the super capacitor according to the present invention;

FIG. 8 is a specific circuit diagram of the control interface circuit module according to the present invention;

FIG. 9 is a power control flow diagram of the present invention;

FIG. 10 is a graph of three common dimming curves;

FIG. 11 is a flow chart of the method for writing ID numbers according to the present invention;

FIG. 12 is a flow chart of a method for generating pseudo random numbers by the apparatus of the present invention;

FIG. 13 is a flow chart of the server generating a random number according to the present invention;

FIG. 14 is a circuit diagram of the random number generation method of the RC circuit of the present invention;

FIG. 15 is a circuit diagram of a voltage random number generation method according to the present invention;

FIG. 16 is a circuit diagram of a current random number generation method according to the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Example 1:

as shown in fig. 3, the novel charging management circuit of the independent feedback monitoring device adopts current feedback and voltage feedback control modes. The charging circuit specifically comprises a feedback control module of a charging module, a capacitor C31, a capacitor C32, a capacitor C33, an inductor L31, an inductor L32, a diode D31, a switch Q31 and a sampling resistor R31. Two ends of the capacitor C31 are used as input ends, and one end of the capacitor C31 is connected with the anode of the input end, one end of the inductor L31 and one end of the feedback control module; the other end of the inductor L31 is connected to one end of the switch Q31 and one end of the capacitor C32; the other end of the capacitor C32 is connected with one end of the inductor L32 and the anode of the diode D31; the cathode of the diode D31 is connected to one end of the capacitor C33 and one end of the resistor R32; the other end of the resistor R32 is connected with the feedback control module and one end of the resistor R33; the other end of the capacitor C31 is connected with the cathode of the input end, the other end of the switch Q31, the other end of the inductor L32, the other end of the capacitor C33 and one end of the sampling resistor R31, and the other end of the sampling resistor R31 and one end of the feedback control module are used as the cathode of the output end together. One end of the capacitor C33 serves as an anode of the output.

The feedback control module comprises a single chip processor, two operational amplifiers, 11 resistors, two capacitors, two diodes and a photoelectric coupler. The single chip microcomputer processor U31, the operational amplifier U32 and the operational amplifier U33; the 11 resistors are respectively a resistor R32, a resistor R33, a resistor R34, a resistor R35, a resistor R36, a resistor R37, a resistor R38, a resistor R39, a resistor R310, a resistor R311 and a resistor R312; the two capacitors comprise a capacitor C34 and a capacitor C35; the two diodes are diode D32 and diode D33.

The singlechip microcomputer processor U31 is connected with one end of the resistor R312, the photoelectric coupler, one end of the resistor R310, one end of the resistor R311, one end of the resistor R36 and one end of the resistor R37; the other end of the resistor R312 is connected with a photoelectric coupler, and one end of the photoelectric coupler is connected with the anode of the diode D32 and the anode of the diode D33; the cathode of the diode D32 is connected with one end of the capacitor C34 and the operational amplifier U32; the other end of the capacitor C34 is connected with one end of a resistor R35; the other end of the resistor R35 is connected with one end of a resistor R34 and an operational amplifier U32, and the other end of the resistor R34 is connected with the other end of a resistor R32 and one end of a resistor R33; one end of the operational amplifier U32 is connected to the other end of the resistor R36. The cathode of the diode D33 is connected with one end of the capacitor C35 and the operational amplifier U33; the other end of the capacitor C35 is connected with one end of a resistor R39; the other end of the resistor R39 is connected with one end of a resistor R38 and the operational amplifier U33, and the other end of the resistor R38 is connected with one end of a resistor R31; one end of the operational amplifier U33 is connected to the other end of the resistor R310, and the other end of the resistor R311 is grounded.

The circuit of the scheme can meet the requirement of terminal power utilization for as long as possible, and a super capacitor with the smallest volume as possible, namely a super capacitor with smaller capacity, is used, so that the power utilization scheme of terminal equipment power saving is realized, and the terminal can be ensured to transmit the line power-off state to the control terminal.

Example 2:

as shown in fig. 1 to 16, the independent feedback monitoring device includes an input module, an output module, a metering monitoring module, a charging management module, a discharging management module, a super capacitor fast discharging module, a communication module, a control interface module, a control module, a power supply module, a super capacitor, a diode D11, a diode D12, and a discharging resistor R11.

The input module is used for connecting a power supply and is connected with commercial power.

The output module is used for connecting a load, namely various devices needing to be monitored and controlled.

The control interface module outputs digital signals or analog signals such as 0-10V signals, PWM signals and the like to the outside.

The communication module is used for signal transmission and wireless signal transmission is carried out through the antenna.

The charging management circuit module is used for charging the super capacitor.

The discharge management circuit module is used for super capacitor discharge management.

The super capacitor quick discharge module is used for quickly releasing the energy of the super capacitor.

The metering monitoring module is used for acquiring commercial power information and processing the commercial power information to obtain information such as voltage, current, power factor, power consumption and the like. The current sampling module in the metering monitoring module is connected in series with the L line of the output module, the voltage sampling module is connected in parallel with the L line and the N line of the input module, and the signal processing module is connected with the control module for information exchange.

The power module adopts an AC/DC power module and is used for supplying power to the metering monitoring module, the control module and the communication module when the device normally works under commercial power, and the super capacitor is charged through the charging management circuit.

The super capacitor C11 is used for energy storage, and has longer service life compared with other energy storage devices.

The diode D11 and the diode D12 are used to isolate the output voltages of the power supply module and the discharge management module.

The control module is connected with the metering monitoring module, the communication module, the control interface module and the super capacitor quick discharge module.

The input module is connected with the metering monitoring module, the metering monitoring module comprises a current sampling module, a voltage sampling module and an information processing module, the input end of the current sampling module is connected with the live wire of the input module, the two input ends of the voltage sampling module are connected with the live wire and the zero wire of the input module, the output end of the current sampling module is connected with the input end of the information processing module and one end of a control switch K11, the output end of the voltage sampling module is connected with the input end of the information processing module, and the output end of the information processing module is connected with the control module; the live wire of the output module is connected with the other end of the control switch K11, and the third port of the control switch K11 is connected with the control module. The zero line of the input module is connected with the zero line of the output module.

The power supply module is connected with the input module, the metering monitoring module, the control module and the power failure reporting module. The power failure reporting module comprises a charging module, a discharging module, a super capacitor management module, a diode and a load resistor R11. The diodes include a first diode D11 and a second diode D12. The charging module is connected with two ends of the super capacitor and connected with the discharging module and the super capacitor management module, and the super capacitor management module is connected with the load resistor. The junction of the charging module and the power supply module is connected with the anode of a second diode D12, the cathode of a second diode D12 is connected with the cathode of a first diode D11, the control circuit and the communication circuit, the anode of the second diode is connected with the discharging module, and a capacitor C12 is connected to the discharging module. The super capacitor is used as energy storage because the service life of the super capacitor is longer than that of other components. The load resistor R11 is used for rapid discharge during discharge, and is mainly convenient for rapidly monitoring whether the equipment is qualified after production.

As shown in fig. 2, the charging management circuit of the standalone feedback monitoring device. V2in + and V2 in-are connected with the positive and negative electrodes of the output end of the power supply module, and V2out + and V2 out-are connected with the positive and negative electrodes of the super capacitor.

The LED lamp further comprises a single chip microcomputer processor U21, a capacitor C21, a capacitor C22, a capacitor C23, an inductor L21, an inductor L22, a diode D21, a switch Q21, a resistor R22, a resistor R23 and a current-limiting resistor R21. Two ends of the capacitor C21 are used as input ends, and one end of the capacitor C21 is connected with the anode of the input end, one end of the inductor L21 and one end of the singlechip processor U21; the other end of the inductor L21 is connected to one end of the switch Q21 and one end of the capacitor C22; the other end of the capacitor C22 is connected with one end of the inductor L22 and the anode of the diode D21; the cathode of the diode D21 is connected with one end of the current-limiting resistor R21, one end of the capacitor C23 and one end of the resistor R22; the other end of the resistor R22 is connected with one end of the singlechip processor U21 and one end of the resistor R23; the other end of the capacitor C21 is connected to the cathode of the input terminal, the other end of the switch Q21, the other end of the inductor L22, and the other end of the capacitor C23, and serves as the cathode of the output terminal. The other end of the current limiting resistor R21 serves as the anode of the output.

The resistor R21 is used to avoid the damage of diode D21 due to excessive current when charging the super capacitor. The current limiting function is realized.

As shown in fig. 3, for another circuit of charge management, a current feedback and voltage feedback control method is adopted. Which may be interchanged with the scheme of figure 2.

The charging circuit specifically comprises a feedback control module of a charging module, a capacitor C31, a capacitor C32, a capacitor C33, an inductor L31, an inductor L32, a diode D31, a switch Q31 and a sampling resistor R31. Two ends of the capacitor C31 are used as input ends, and one end of the capacitor C31 is connected with the anode of the input end, one end of the inductor L31 and one end of the feedback control module; the other end of the inductor L31 is connected to one end of the switch Q31 and one end of the capacitor C32; the other end of the capacitor C32 is connected with one end of the inductor L32 and the anode of the diode D31; the cathode of the diode D31 is connected to one end of the capacitor C33 and one end of the resistor R32; the other end of the resistor R32 is connected with the feedback control module and one end of the resistor R33; the other end of the capacitor C31 is connected with the cathode of the input end, the other end of the switch Q31, the other end of the inductor L32, the other end of the capacitor C33 and one end of the sampling resistor R31, and the other end of the sampling resistor R31 and one end of the feedback control module are used as the cathode of the output end together. One end of the capacitor C33 serves as an anode of the output.

Fig. 4 is a discharge management circuit diagram, and the main function of the circuit is to enable a super capacitor to supply power to a control module and a communication module under the condition of mains supply outage, so that the modules report abnormal mains supply information to a server. The voltage of the super capacitor can be gradually reduced when the energy is released, and the special discharging management circuit ensures the stability of the power supply voltage for the control module and the communication module when the voltage of the super capacitor is gradually reduced.

V4in + and V4 in-of the circuit are connected with the positive pole and the negative pole of the super capacitor. V4out + is connected to the anode of the isolation diode D11. V4 out-is connected to the grounds of the control module and the communication module.

The single-chip microcomputer control circuit comprises a single-chip microcomputer processor U41, a capacitor C41, a capacitor C42, a capacitor C43, an inductor L41, an inductor L42, a diode D41, a switch Q41, a resistor R41 and a resistor R42. Two ends of the capacitor C41 are used as input ends, and one end of the capacitor C41 is connected with the anode of the input end, one end of the inductor L41 and one end of the singlechip processor U41; the other end of the inductor L41 is connected to one end of the switch Q41 and one end of the capacitor C42; the other end of the capacitor C42 is connected with one end of the inductor L42 and the anode of the diode D41; the cathode of the diode D41 is connected with one end of the current-limiting resistor R41 and one end of the capacitor C43; the other end of the resistor R41 is connected with one end of the singlechip processor U41 and one end of the resistor R42; the other end of the capacitor C41 is connected to the cathode of the input terminal, the other end of the switch Q41, the other end of the inductor L42, and the other end of the capacitor C43, and serves as the cathode of the output terminal. The cathode of the diode D41 serves as the anode of the output.

Fig. 5 shows a super capacitor fast discharge circuit, which aims to quickly discharge the electric quantity of the super capacitor for upgrading the device program or during production and maintenance. The system specifically comprises a super capacitor C11, a load resistor R11 and a switch Q51 (a relay, an MOS tube or a triode and the like are adopted); when the singlechip processor U51 receives a command of discharging, the Q51 is controlled to be closed, and at the moment, the super capacitor releases energy through the load resistor R11. V5in + and V5 in-in FIG. 5 are connected with the positive pole and the negative pole of the super capacitor C11, and V5out + and V5 out-are connected with the two ends of the load resistor R11.

The specific implementation method for the rapid discharge of the super capacitor comprises the following steps: the specific operation flow is shown in fig. 6, the circuits are the control module, the control interface module, the circuit in fig. 5 and the circuit in fig. 8 in fig. 1, when the output end of the control interface module in fig. 1 is short-circuited, the single chip processor U81 detects the short-circuited state of the interface circuit and feeds back the information to the control circuit module, and at this time, the single chip processor U51 receives the information and starts to execute a discharging instruction.

Another specific implementation method for rapid discharge of the super capacitor is as follows: and carrying out discharge control by using a mode of periodically powering on and powering off the device by using self-made equipment. The control flow is shown in fig. 7, and the circuits are the input module, the power supply module, the control circuit module (including the timer and the counter) in fig. 1 and the circuit in fig. 5. When the device is produced, repaired and maintained, the input end of the device is periodically (for example, 5S power-on and 5S power-off) supplied with power (adopting direct current low voltage), and the control module detects the voltage signal of the AC/DC module. The timer in the control circuit module respectively times power-on time and power-off time and is used for judging whether the additional signal is normal or not, when the value of the timer reaches a set value (which can be set to 10 times), the counter is triggered to start counting the power-on and power-off times, when the count value reaches the set value, the counter is judged to need to execute a discharge instruction, and at the moment, the single chip microcomputer processor U51 closes the switch Q51 to start rapid discharge on the super capacitor.

Fig. 8 is a specific circuit diagram of the control interface module, and this function is mainly for the LED control device and the electronic ballast with the dimming mode as the load device. The output of which can produce two signals, one is an analog signal 0-10V and the other is a digital signal PWM. The matched control signal is selected by judging the dimming mode of the load equipment by the device. The transistor Q81 is used for controlling the output of the digital signal PWM wave, and the transistor Q82 is used for controlling the output of the analog signal 0-10V. The operational amplifier U82 is used for signal amplification, and the operational amplifier U83 is used for signal buffer output.

The circuit comprises nine resistors, a capacitor, two triodes, a singlechip processor and two operational amplifiers; three pins of the singlechip processor U81 are respectively connected with one end of a resistor R81, one end of a resistor R82, one end of a resistor R83 and one end of a resistor R84, and a resistor R83 and a resistor R82 are connected with the same pin; the other end of the resistor R81 and the other end of the resistor R82 are respectively connected with a base electrode and an emitting electrode of the triode Q81; the other end of the resistor R83 is connected with one end of the capacitor C81 and the emitter of the triode Q82, and one end of the resistor R84 is connected with the base of the triode Q82; a collector of the triode Q81 and a collector of the triode Q82 are connected with one end of the resistor R85, and the other end of the resistor R85 is connected with a positive pin of the operational amplifier U82; a negative electrode pin of the operational amplifier U82 is connected with one end of the resistor R86 and one end of the resistor R87; the other end of the resistor R87 is connected with one pin of the operational amplifier U82 and the anode pin of the operational amplifier U83; a negative electrode pin of the operational amplifier U83 is connected with an output pin of the operational amplifier U82, one end of the resistor R88 and one end of the resistor R89; the other end of the resistor R88 and the other end of the resistor R89 are respectively used as connection points of the external interface.

Fig. 9 shows a power control flow chart. The function is mainly aimed at the equipment which needs power regulation, such as an LED control device with a dimming mode, an electronic ballast and the like.

The current LED control device/electronic ballast power regulation modes in the market mainly comprise three modes, namely 0-10V and 1-10V, PWM. The LED control device/electronic ballast dimming interface is externally connected with a device with a dimming signal to adjust the output current of the device so as to realize power adjustment. For example, there are three dimming ways of the LED control devices installed on the same road, and three dimming curves are shown in fig. 10, so that when a conventional street lamp controller is used to execute a unified dimming command, problems such as large power deviation of each lamp and uneven road illumination may occur.

The partial circuits are a control interface module, a control module and a metering monitoring module in fig. 1, wherein the control interface module is connected with a power regulating interface circuit of load equipment. When the device receives a power adjusting instruction (the power adjusting instruction comprises a power value needing load operation), the power is detected through the metering monitoring module, the detected actual power value of the load equipment is sent to the control circuit, the control circuit compares the detected value with the target value, and when the detected value is equal to the target value, the power adjusting action is not carried out, and the power value is directly written into the memory. When the detected value is not equal to the target value, the control circuit controls the interface circuit to adjust the power of the load device by changing the voltage of 0-10V or PWM until the power reaches the target value, and writes the final power value into the memory.

The random number generation mechanism, for example, NB-loT is a transmission mode of the internet of things that is the fastest developing at present, supports large-area application, but does not support simultaneous online or highly real-time application scenarios, and if a large number of devices of NB-loT send data to a server at the same time, server blocking or network blocking may be caused, even the devices may be listed in a blacklist, resulting in instability of the entire system, causing misjudgment exception judgment, and the like. How to solve the problem of the concurrency number, in most common application scenarios, in order to reduce and reduce the power consumption of the device, the device of NB-loT is generally adopted to actively send information to the server, but it is difficult to coordinate and control the NB-loT device to send the information. For example, in the same local area network, there are many NB-loT devices (taking an independent feedback monitoring device as an example), if power is off in the local area network, these NB-loT devices will be detected almost at the same time and all will be transmitted upwards, and a problem of blocking occurs at a high probability, so that the retransmission times are increased, and blocking of network devices may cause device misjudgment, and may be considered as a black list.

By adopting a random number mechanism, when each NB-loT device reports the same event to the server, a random delay is generated through the random number of the NB-loT device, and the concurrent number at the same time and the same event is reduced by the method. The specific method for generating the random number comprises an ID number writing method, a device generation pseudo-random number method, a server generation random number method and a circuit random number generation method. As shown in particular in fig. 11 to 16.

The ID number writing method comprises the following specific steps: and writing unique ID numbers for various products of different batches according to an ID coding method. The control circuit of fig. 1 further includes a memory module, and the devices are produced by writing a unique ID number for each device, and the ID number is stored in the memory module. The writing step is as shown in fig. 11, and only when the writing is successful, the writing is stopped, otherwise, the corresponding unsuccessful information is consistently indicated.

The device generated pseudo random number method is specifically as follows: before each device leaves factory, a pseudo random number is stored, namely a fixed random number generated by a computer before leaving factory, the random number has no relation with an ID number, and the random number is also stored in a storage module.

The method for generating the random number by the server is as follows: the information is stored in the storage module when the information is distributed by the server where the equipment is located, namely the server uniformly distributes random numbers according to the area where the equipment is located.

The circuit random number generation method comprises an RC circuit random number generation method, a voltage random number generation method and a current collection random number generation method.

The RC circuit random number generation method is specifically as follows. As shown in fig. 14, the control circuit is connected to the memory circuit, the resistor R141, and the capacitor C141. Since the resistance value and the capacitance value are normally distributed, the voltages on the capacitors in the RC circuits of different devices have discreteness.

When 3.3V voltage is applied to the R141 and C141 circuits, the control circuit starts to sample the voltage on the capacitor C141 and counts time in milliseconds, and when the voltage on the capacitor C141 reaches the set 2.5V, the control circuit enlarges the time required for reaching 2.5V by a hundred times or a thousand times and stores the time as a final random number in the storage circuit.

Voltage random number generation method. Specifically, as shown in fig. 15, 3.3V or 5V is applied to a voltage dividing circuit including a resistor R141 and a resistor R152, and the voltage at R152 has a dispersion due to the dispersion of the resistance value and the dispersion of the applied voltage. The control circuit collects the discrete voltage data formed by the resistor R151 and the resistor R152, expands the data by hundreds or thousands of times, and stores the data into the storage circuit as random numbers.

The current random number generation method is shown in fig. 16, and the circuit mainly comprises an input circuit, an output circuit, a metering monitoring circuit, a control circuit and a storage circuit. Due to the discreteness of the mains voltage and the differences in the loads carried by the individual devices, the discreteness of the mains current on each installation is large. The metering monitoring module is used for measuring the current value of the commercial power on each device and transmitting the current value to the control circuit, and the control circuit multiplies the current value by a coefficient and stores the current value as a random number in the storage circuit.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the concept of the present invention, and these improvements and decorations should also be considered as the protection scope of the present invention.

Claims

1. Novel charge management circuit of stand alone type feedback monitoring device, its characterized in that: the charging circuit comprises a feedback control module of a charging module, a capacitor C31, a capacitor C32, a capacitor C33, an inductor L31, an inductor L32, a diode D31, a switch Q31 and a sampling resistor R31; two ends of the capacitor C31 are used as input ends, and one end of the capacitor C31 is connected with the anode of the input end, one end of the inductor L31 and one end of the feedback control module; the other end of the inductor L31 is connected to one end of the switch Q31 and one end of the capacitor C32; the other end of the capacitor C32 is connected with one end of the inductor L32 and the anode of the diode D31; the cathode of the diode D31 is connected to one end of the capacitor C33 and one end of the resistor R32; the other end of the resistor R32 is connected with the feedback control module and one end of the resistor R33; the other end of the capacitor C31 is connected with the cathode of the input end, the other end of the switch Q31, the other end of the inductor L32, the other end of the capacitor C33 and one end of the sampling resistor R31, and the other end of the sampling resistor R31 and one end of the feedback control module are used as the cathode of the output end;

one end of the capacitor C33 serves as an anode of the output.

2. The novel charge management circuit of a self-contained feedback monitoring device of claim 1, further comprising: the feedback control module consists of a single chip processor, two operational amplifiers, 11 resistors, two capacitors, two diodes and a photoelectric coupler;

the single chip microcomputer processor U31, the operational amplifier U32 and the operational amplifier U33; the 11 resistors are respectively a resistor R32, a resistor R33, a resistor R34, a resistor R35, a resistor R36, a resistor R37, a resistor R38, a resistor R39, a resistor R310, a resistor R311 and a resistor R312; the two capacitors comprise a capacitor C34 and a capacitor C35; the two diodes are respectively a diode D32 and a diode D33;