CN101876830A - Electric curtain control device with automatic positioning function - Google Patents

Abstract

The invention relates to a currently-widely-used synchronous motor-based electric curtain device. A curtain position memory function and a curtain opening and closing position automatic positioning function are realized only by adding a simple circuit into a curtain control device and adopting a novel curtain automatic positioning algorithm without changing the structures of a motor power device and tracks. The electric curtain device has the characteristics of simple structure, stable and reliable performance and low cost, and can be widely applied in the fields of window curtain controllers, camera cradle heads, stage lighting, curtain controllers, advertisement signboard controllers, industrial automatic control and the like.

Description

A kind of electric curtain control device that possesses automatic positioning function

Affiliated technical field

The invention belongs to electric curtain control device, particularly can remember and locate automatically the curtain control device of curtain folding position.

Background technology

Traditional electric curtain control system generally is made up of parts such as controller, electric power device and curtain tracks (some electric curtain, as electric rolling, no track).Controller is used to receive external control instruction (manual or remote control), the operation of control electric power device; Electric power device generally is made up of parts such as ac synchronous motor, reducing gear, folding limit switches; Curtain rail is responsible for hanging curtain, and the mechanical energy of propulsion system is passed to curtain, drives the curtain open and close movement.All there is a common problem in this class electric curtain control system, promptly curtain can not be navigated to a certain assigned address automatically.In order to address this problem, existing procucts or patent have proposed multiple solution: as increase shade position pick-up unit on the curtain track, or at clutch end installation motor rotational angle counting assembly.This class device all is in order to obtain the current physical location in orbit of curtain in essence, when curtain arrives assigned address, pick-up unit is given controller with this signal feedback, and controller stops drive motor and rotates, thereby realizes automatically curtain being rested on the function of assigned address.These class methods are feasible substantially on principle, but all need to increase accurate mechanical/electrical minor structure, and then cause problems such as its cost up, complex structure, reliability deficiency, therefore fail extensive practicability.

Summary of the invention

It is a kind of simple in structure that technical matters to be solved by this invention is to provide, and can remember and locate automatically the curtain control device of curtain folding position.

The technical solution adopted for the present invention to solve the technical problems is (referring to Fig. 1): [1] is curtain control device among the figure, opens relay K 1 and curtain closed relay K2 forms by [101] power-supplying circuit, [102] motor current detecting circuit, [103] main control circuit, [104] driving circuit and curtain; [2] be electric curtain system dynamic device, close limit switch S2 by synchronous motor M1 and curtain opening limit switch S1 and curtain and form.Compare with traditional electric curtain control circuit, except that having increased [102] motor current detecting circuit, the other parts basically identical.Whether [102] motor current detecting circuit is used for detecting has electric current to flow through A point (just flowing through [2] electric curtain system dynamic device), and will be converted into voltage signal to signal, is reflected in the B point.

Based on foregoing circuit, for realizing curtain folding position memory and locate automatically that control device needs to be described below respectively according to following four kinds of process work:

1, curtain self check process

Under this process, controller will at first drive curtain and open relay K 21 closures, and curtain begins closure, and whether begin to detect [102] motor current detecting circuit simultaneously has electric current to flow through.When curtain runs to closed extreme position, the closed limit switch S21 open circuit of curtain, motor stops action, and [102] motor current detecting circuit shows that no current flows through.After detecting this signal, main controller circuit drives curtain and opens relay K 21, picks up counting simultaneously, run to opening limit switch S1 open circuit until curtain, at this moment, when main control circuit detects [102] motor current detecting circuit no current and flows through, stop timing.The duration that records as a constant T, is recorded in the nonvolatile memory, uses as the constant of system's operation from now on.Curtain control device inside is with variable t=0 of initialization simultaneously.This self check process generally installs at curtain equipment, is moved once by manual activation before using first; Also can be after the curtain long-time running, after various mechanical wears cause time constant K to change, manual activation calibration once more.

2, the electronic moving process of curtain

During the each folding of curtain operation, all need to write down, and will work as time actuation time and add up, forms new variable t value, and record with the variable t value that kept last time when time working time of action, wherein when inferior the action be to close curtain, actuation time is being for just, otherwise is to bear.In order to eliminate repeatedly the accumulated error in the moving process, when main control circuit detected curtain arrival standard-sized sheet end, the time t that will reset was 0, is set to T at the complete shut-down end.In order to prevent that factors such as power failure from causing main control circuit to lose this data, these data can be recorded in the nonvolatile memory after each the renewal.

3, record curtain folding position process

Manually curtain is moved behind assigned address, give an order to controller, controller is t ' with current time t value record, establishes p=t '/T * 100%, if p＜0% is then made p 0% processing, if p＞100% is then done 100% with p and handled.P is noted, as the location records value of curtain.Here, record p value, rather than record t ' value can reduce when the T value changes, to the influence of automatic bearing accuracy.

4, automatic position fixing process;

Receive instruction at controller, when requiring to navigate to the position p of last registration automatically, system calculates t ' value according to the p value of storage, and promptly t '=p*T calculates Δ t=t '-t then.If Δ t＞0 then drives curtain and opens relay K 1 closure; If Δ t＜0 then drives the closed open relay K1 of curtain closure, drive the curtain action, be 0 or be an enough little value until Δ t.Like this, curtain is the position that last registration is arrived in folding.

The invention has the beneficial effects as follows: based on present widely used synchronous electric curtain device, only needing increases ball bearing made using and adopts new shade position algorithm in the curtain controller, can realize the memory and the curtain folding position automatic positioning function of shade position, simple in structure, stable and reliable for performance, cost is low.

Description of drawings

Fig. 1 is a circuit theory synoptic diagram of the present invention.

Fig. 2 is motor current detecting circuit figure.

Embodiment

Compare with traditional electric curtain control system, the present invention is consistent with it on propulsion system and curtain track, can be general, just in controller, increased motor current detecting circuit.This example is promptly introduced a kind of simple in structure, and the specific implementation of the motor current detecting circuit of reliable operation sees also Fig. 2.The circuit form of current detecting class is a lot, and specific implementation has more than and is confined to this.

In this circuit, the civil power live wire from A hold into, bring out by B, detected output signal outputs to main control circuit by C.Wherein, D1-D4 forms the diode-type current detection circuit, and D1, D2, D4 form the forward conduction circuit, and D3 forms the reverse-conducting circuit; U1 is a photoelectrical coupler, is used for forceful electric power and light current are isolated, and transmits the detection output signal to microprocessor module, and the C end draws on microprocessor module inside, and R1 is the current-limiting resistance of photoelectrical coupler.

Do not switch on when running when motor, flowing through B point electric current is 0, and U1 does not work at this moment, C point current potential by on draw and be height; When electrical power turns round, will there be electric current to flow through the B point, when the positive half cycle of power supply, D1, D2, D4 conducting form the pressure drop of about 2.1-2.4V, and this voltage is added to the U input end by R1, and U1 starts working, and then U1 output terminal (being the C point) is output as low; When the power-half cycle, the D3 conducting, U input end reverse bias, U1 does not work, and then U1 output terminal (being the C point) is output as height.Like this when motor moves, naming a person for a particular job at C obtains a pulse signal, and when motor did not move, C point perseverance was a high level.Whether main control circuit has pulse signal by detecting the C point, can judge that whether motor is in running.

Claims (7)

1. an electric curtain control device that possesses automatic positioning function is opened relay and curtain closed relay etc. by power-supplying circuit, motor current detecting circuit, main control circuit, driving circuit and curtain and is partly formed.

2. electric curtain control device according to claim 1 is characterized in that: whether with traditional curtain control device, increased a motor current detecting circuit relatively, being used for detection has electric current to flow through electric curtain system dynamic device.

3. electric curtain control device according to claim 1, it is characterized in that: before using automatic positioning function, system will carry out the self check process at least one time: i.e. control device driving curtain moves once between standard-sized sheet and complete shut-down, and noted as constant T the working time between standard-sized sheet and standard-sized sheet, with variable t=0 of timed unit internal initialization.

4. electric curtain control device according to claim 1, it is characterized in that: when curtain moves in each folding, all need to write down when time working time of action, and the variable t that will work as time actuation time and reservation last time directly adds up, form new variable t value, and record, wherein working as time action is to close curtain, actuation time is being for just, otherwise for negative.

5. electric curtain control device according to claim 4 is characterized in that: in order to eliminate repeatedly the accumulated error in the moving process, when main control circuit detected curtain arrival standard-sized sheet end, the time t that will reset was 0, is set to T at the complete shut-down end.

6. electric curtain control device according to claim 1, it is characterized in that: when record curtain current location, control device is not the current operation time t of record, but the ratio of record t and T, to reduce when the T value changes the influence to automatic bearing accuracy.

7. electric curtain control device according to claim 1 is characterized in that: use constant-seed motor to drive with the matching used electric curtain propulsion system of this curtain control device.

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