CN207051386U

CN207051386U - Power judge module

Info

Publication number: CN207051386U
Application number: CN201720554170.3U
Authority: CN
Inventors: 陈景正; 陈彦亘
Original assignee: SHANGHAI LUMEX SYSTEMS Co Ltd
Current assignee: SHANGHAI LUMEX SYSTEMS Co Ltd
Priority date: 2017-05-18
Filing date: 2017-05-18
Publication date: 2018-02-27
Anticipated expiration: 2027-05-18

Abstract

The utility model proposes a kind of power judge module, it include current sampling unit, pwm signal generation unit and control unit；Current sampling unit is used to carry out current sample to the supply line of load supplying, and sampling is obtained into current signal and is converted to voltage signal；Pwm signal generation unit is used to voltage signal generating pwm signal；Control unit is used for the dutycycle for calculating several cycles in pwm signal, and by the dutycycle in each cycle compared with reference point to judge current power, the utility model have simple in construction, power judge rationally, available for realize intellectual determination, cost is low the advantages of.

Description

Power judge module

Technical field

The intelligent apparatus technical field such as smart jack, switch is the utility model is related to, is especially that a kind of power judges mould Block.

Background technology

After the access load of the intelligent apparatus such as smart jack, switch, for example smart jack grafting air-conditioning, air-conditioning are exactly to load, Due to air-conditioning have it is standby and work two states, so rationally judge whether in it is standby by be other control process base strip It is reasonable that part, only power judge, other control actions of intelligent apparatus just can be operated correctly, and the hommization of intelligent apparatus is set Meter can preferably be realized that Consumer's Experience just can be more preferable.

Substantially it is the judgement to current power for standby judgement, prior art intelligently fills to smart jack, switch etc. Put and study for many years, but yet there are no and can be achieved rationally to judge the energy of power using a kind of simple power judge module Power, the application are intended to do more in-depth study on the technique direction, are desirably to obtain a kind of simple power judge module, Simple in construction, power is judged rationally, available for realizing that intellectual determination, cost are low.

Utility model content

Technical problem to be solved in the utility model is the defects of overcoming prior art, there is provided a kind of power judges mould Block, simple in construction, power are judged rationally, available for realizing that intellectual determination, cost are low.

In order to solve the above technical problems, the utility model proposes a kind of power judge module, it include current sampling unit, Pwm signal generation unit and control unit；

Current sampling unit is used to carry out current sample to the supply line of load supplying, and sampling is obtained into current signal Be converted to voltage signal；

Pwm signal generation unit is used to voltage signal generating pwm signal；

Control unit is used for the dutycycle for calculating several cycles in pwm signal, and by the dutycycle compared with reference point To judge current power.

After such scheme, compared with prior art, the utility model has advantages below：With simple in construction, work( Rate judge rationally, available for realize intellectual determination, cost is low the advantages of, specifically, first, current sampling unit is only by electricity Stream signal is converted to voltage signal, and circuit structure is simple, and the voltage signal is converted into PWM in conjunction with pwm signal generation unit Signal, such as implementation can use the circuit around comparator design, relatively simple, and control unit is believed according to PWM The situation of the waveform in several cycles calculates dutycycle in number, and by dutycycle compared with reference point to judge current power, one Carry out power to judge rationally, two, computing capability and the data storage capacities requirement of calculating process and deterministic process to control unit Low, control unit operand is small, therefore control unit can use the single-chip microcomputer of low cost, and current sampling unit, pwm signal The cost of generation unit is relatively low, and so, holistic cost is relatively low, and three, dutycycle is real-time with the electric current in supply line Change and change, by dynamic and objectively respond the electricity consumption situation of load, therefore, with the change of electricity consumption situation, judge also to exist Change, is so achieved that intellectual determination；Reference point is more, that is, divide it is thinner, then to current power judge it is all the more accurate；It is comprehensive Close and state, the application have simple in construction, power judge rationally, available for realize intellectual determination, cost is low the advantages of.

As an improvement, it also includes trigger element, next the trigger element will be calculated for starting control unit Dutycycle be set as reference point, so, by setting trigger element, it is possible to achieve next manually booting control unit will count Obtained dutycycle is set as that reference point, such as the dutycycle being calculated under ideal case are set as reference point, then, Dutycycle reference point is adjusted according to the standby actual conditions of different loads, so that the application operation is more reliable, stably, is treated It is more reasonable that machine judges, while is also convenient for adjustment and installation personnel and carries out adjustment and installation, is brought to later stage user and preferably uses body Test；Above-mentioned setting make it that the application is relatively simple with the ability learnt, structure.

Brief description of the drawings

Fig. 1 is the frame principle figure of the application.

Fig. 2 is the circuit theory diagrams of current sampling unit.

Fig. 3 is the circuit theory diagrams of pwm signal generation unit.

Fig. 4 is the circuit theory diagrams of trigger element.

Embodiment

The utility model is described in further detail below：

A kind of power judge module, illustrated by taking 220V, 50Hz that China uses civil power as an example,

It includes current sampling unit, pwm signal generation unit and control unit.

Current sampling unit is used to carry out current sample to the supply line of load supplying, and sampling is obtained into current signal Be converted to voltage signal.

Pwm signal generation unit is used to voltage signal generating pwm signal.

Several cycles can be each cycle in pwm signal in pwm signal, or in pwm signal at equal intervals or Multiple cycles in multiple cycles that unequal interval occurs, or selection pwm signal etc., certainly, will be to work(using each cycle The judgement of rate is more accurate.

The detailed process of the dutycycle in each cycle is in calculating pwm signal：For the ripple in each cycle in pwm signal Shape, the ratio that the time maintained higher than waveform portion caused by setting value accounts for the cycle are designated as the first detected value, the first detected value That is dutycycle, the ratio that the time maintained less than waveform portion caused by setting value accounts for the cycle are designated as the second detected value, and this Two detected values are it can be appreciated that dutycycle.

By the dutycycle compared with reference point using judge the detailed process of current power as：When the first detected value is close or waits When the first reference point, control unit then judges current power for the power corresponding to the first reference point, and the first reference point is at least For one, first reference point is the first detected value being calculated under corresponding power, or, when the second detected value is close or waits When the second reference point, control unit then judges current power for the power corresponding to the second reference point, and the second reference point is at least For one, second reference point is the second detected value being calculated under corresponding power.

Current sampling unit includes the circuit designed according to current divider method, and pwm signal generation unit includes comparator, electric current For sampling unit to pwm signal generation unit output voltage signal, the voltage signal is used for the reference electricity with pwm signal generation unit Pressure ratio is compared with pwm signal generation unit is used to export the first signal or secondary signal to control unit according to comparative result, i.e., to control Unit output pwm signal processed.

Current sampling unit is serially connected in supply line including constantan RB1, first resistor RB2, the first electric capacity C1B, constantan RB1 In, the curent change of load is converted into voltage signal by constantan RB1, and first resistor RB2, the first electric capacity C1B form RC filtering knots Voltage signal is handled backward pwm signal generation unit and exported by structure, the RC filter structures.

Pwm signal generation unit includes second resistance R31, the 4th resistance R32, the 5th resistance R33 and comparator U5A, the The common port of two resistance R31 and the 4th resistance R32 series connection electrically connects with comparator U5A first input end, second resistance R31's The other end is grounded, and the 4th resistance R32 another termination 3V dc sources, comparator U5A also powers by 3V dc sources, by the Two resistance R31 and the 4th resistance R32 setting obtains the voltage of first input end, and the voltage is as the reference voltage, i.e., described Setting value, the output end V1P and comparator U5A of the output voltage signal of current sampling unit the second input electrically connects, Comparator U5A output end and the 5th resistance R33 one end are electrically connected to form a common port GL, common port GL and control unit Electrical connection, the 5th resistance R33 another termination 3V dc sources, described voltage signal are changing, the voltage signal and reference Voltage ratio relatively after can export the first signal or secondary signal to control unit, if voltage signal is more than reference voltage, export First signal, if voltage signal is less than reference voltage, secondary signal is exported, thus forms pwm signal；In this example, if electric Pressure signal is more than reference voltage, then exports low level, as digital signaling zero, i.e. the first signal, if voltage signal is less than with reference to electricity Pressure, then export high level, as data signal 1, i.e. secondary signal, then continuous 0 time maintained was t2, continuously 1 time maintained was t4, and certainly, cycle t also can determine by the first signal or secondary signal.

Control unit can use the circuit for surrounding single-chip microcomputer structure, and there is function, the realizations such as calculating, storage, judgement to account for The calculating of empty ratio, and by dutycycle compared with the reference point set to judge current power.

Trigger element is on-off circuit, and the on-off circuit includes switch S4, the 6th resistance R28, and it is straight that switch S4 mono- terminates 3V Power supply is flowed, the switch S4 other ends connect to form a common port TEST with the 6th resistance R28, common port TEST and control unit Electrical connection to control unit to export trigger signal, and the 6th resistance R28 other ends ground connection, the on-off circuit is relatively simple, action Reliably, cost is low；By lower switch S4, common port TEST is high level, and the high level is trigger signal.

In this example, the specific calculating process of the first described detected value or the second detected value is：According to the first signal, then When control unit receives the first signal continuously occurred, then the continuous appearance the maintained time is designated as t2, and by public affairs Formula A=t2/t, t=(t3-t1), calculated to obtain the first detected value A；Or according to secondary signal, then when control is single When member receives the secondary signal continuously occurred, then the continuous appearance the maintained time is designated as t4, and presses formula B=t4/ T, t=(t3-t1), calculated to obtain the second detected value B；Or B is calculated by B=1-A；Or based on A=1-B Calculation obtains A；Wherein, t represents the described cycle, and for cycle t, control unit is with first the first signal received or second Start time t1 at the time of residing for signal as cycle t, accordingly, if being used as week at the time of using residing for first the first signal Phase t start time t1, then after the first signal interruption, end at the time of the first signal is residing when occurring again as cycle t Point moment t3, if as cycle t start time t1 at the time of using residing for first secondary signal, when secondary signal is interrupted Afterwards, end of time t3 at the time of residing when secondary signal occurs again as cycle t.

As long as reference point is made certain setting by this module can be used as standby judge module, that is, load under ideal case and obtain To A be designated as the first reference value A 1, for continuous several cycles t, when the A that each cycle t is calculated is respectively less than or is waited When A1, then judge that load is in standby, otherwise redefine t start cycle in continuous several cycles t, and carry out again Judge whether in standby；

Or the B obtained under load ideal case is designated as the second reference value B1, for continuous several cycles t, when every The B that individual cycle t is calculated is all higher than or during equal to B1, then judges that load in standby, otherwise redefines continuous some Individual cycle t t start cycle, and whether rejudged in standby.

T's start cycle is redefined as, once there is the cycle t that A is less than or equal to A1, or, it is more than once there is B Or the cycle t equal to B1, then cycle t is as t start cycle, so, is more conducively judged whether in time in standby, raising Judging efficiency.

The A obtained in the case of loaded work piece is designated as A2, and A1+B obtains C, and C is less than A2, the C as the first reference value, or, The B obtained in the case of loaded work piece is designated as B2, and B1-D obtains E, and E is less than B2, and the E is as the second reference value, and so, A1+B increases Big A1, B1-D reduce B1, and the setting purpose is the adaptability for strengthening the application, so as to tackle the fluctuation of power utilization environment Influence, specifically using great B or D, can be determined according to the degree of fluctuation of actual power utilization environment, naturally it is also possible to subjectivity setting One value, for example B or D are 0.02.

Initial A1 or B1 is set by predetermined manner, to redefine A1 or B1 is then started by on-off circuit, so, is write from memory In the case of recognizing, judged by default A1 or B1 as reference value, and redefine A1 or B1, then can be determined in setting person Load is in the switch S4 of operation switching circuit under ideal case, and A1 or B1 is redefined to realize by switching S4 startups, on State to set and can avoid A1 or B1 confusion, it is ensured that adaptability of the utility model in each use environment, to user with Carry out more preferable usage experience.

Started by switching S4 to realize that redefining A1 or B1 refers to, for example, A1, after Operation switch S4, control unit The A being calculated using within following a period of time is as corresponding A1, for example next a period of time can include for 20 week Phase t, the value that 20 A that 20 cycle t are calculated averagely once are determined is as A1；Such as B1, as Operation switch S4 Afterwards, the B that control unit is calculated using within following a period of time is as corresponding B1, for example next a period of time can wrap Ten cycle t are included, the value that ten B that ten cycle t are calculated averagely once are determined is as B1.

A and B can be described as the two sides of power supply, i.e., in a cycle t, except A is exactly B, then preferable in power supply quality In the environment of, that is, fluctuate it is small, if A, it is known that if B=1-A, similarly, if B, it is known that if A=1-B；Supply line is to refer to, rather than It is confined to the electric wire of access load, all positions for being adapted to current sampling on feeder circuit.

Described above is only better embodiment of the present utility model, therefore all according to described in the utility model patent application range The equivalent change or modification done of construction, feature and principle, be included in the utility model patent application range.

Claims

1. a kind of power judge module, it is characterised in that it is single that it includes current sampling unit, pwm signal generation unit and control Member；

Current sampling unit is used to carry out the supply line of load supplying current sample, and sampling is obtained into current signal conversion For voltage signal；

Pwm signal generation unit is used to voltage signal generating pwm signal；

Control unit is used to calculating the dutycycle in several cycles in pwm signal, and by the dutycycle in each cycle and reference point ratio Compared with to judge current power.

2. power judge module according to claim 1, it is characterised in that it also includes trigger element, the trigger element The dutycycle being next calculated is set as reference point for starting control unit.