Invention content
The main purpose of the embodiment of the present invention is to provide a kind of lock control circuit for electronic lock, solve at least partly
It has determined the technical issues of how avoiding burning electronic lock.In addition, also provide a kind of control circuit with the lock control circuit and
Express delivery cabinet with the control circuit.
To achieve these goals, according to an aspect of the invention, there is provided following technical scheme:
A kind of lock control circuit for electronic lock, including:
CPU controls signal, to control lock driving circuit for exporting;
At least one lock driving circuit, for controlling unlatching/closing of electronic lock;
Power supply is connected with CPU and at least one lock driving circuit, for for CPU and at least one lock drive circuitry;
Setting having time clamps down on circuit between CPU and at least one lock driving circuit, and the time clamps down on circuit for limiting
The uncaging time of electronic lock, power supply also clamp down on circuit power supply for the time.
To achieve these goals, according to another aspect of the present invention, it additionally provides a kind of with above-mentioned lock control circuit
Control circuit.
To achieve these goals, according to a further aspect of the invention, it additionally provides a kind of with above-mentioned control circuit
Express delivery cabinet.
Compared with prior art, above-mentioned technical proposal at least has the advantages that:
The embodiment of the present invention provides a kind of lock control circuit for electronic lock.Wherein, CPU controls signal for exporting, with
Control lock driving circuit.At least one lock driving circuit is used to control unlatching/closing of electronic lock.Power supply and CPU and at least one
A lock driving circuit electrical connection, for for CPU and at least one lock drive circuitry.By being driven in CPU and at least one lock
Setting having time clamps down on circuit between dynamic circuit, to limit the uncaging time of electronic lock.It is thus possible to it avoids burning electronic lock.
Certainly, it implements any of the products of the present invention and is not necessarily required to realize all the above advantage simultaneously.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
It obtains it is clear that being understood by implementing the present invention.Objectives and other advantages of the present invention can be by the explanation write
Specifically noted method is realized and is obtained in book, claims and attached drawing.
Specific embodiment
The technical issues of below in conjunction with the accompanying drawings and specific embodiment is solved to the embodiment of the present invention, used technical side
Case and the technique effect of realization carry out clear, complete description.Obviously, described embodiment is only one of the application
Divide embodiment, be not whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not paying creation
Property labour under the premise of, the embodiment of all other equivalent or apparent modification obtained is all fallen in protection scope of the present invention.
The embodiment of the present invention can be embodied according to the multitude of different ways being defined and covered by claim.
It should be noted that in the following description, understand for convenience, give many details.It is but very bright
Aobvious, realization of the invention can be without these details.
It should be noted that in the case where not limiting clearly or not conflicting, each embodiment in the present invention and its
In technical characteristic can be combined with each other and form technical solution.
In the course of work of lock control circuit, it may appear that unpredictable situation causes lock driving circuit persistently to export height
Level.It in this way can electron lock sustainable supply electric current.When supply electric current duration be more than certain time (such as:5 seconds) when,
Electronic lock may be burnt.
For this purpose, the embodiment of the present invention provides a kind of lock control circuit 10 for electronic lock.As shown in Figure 1, the circuit includes:
CPU12, at least one lock driving circuit 16, power supply 14 and time clamp down on circuit 18.Wherein, CPU12 controls signal for exporting,
Driving circuit 16 is locked with control.At least one lock driving circuit 16 is used to control unlatching/closing of electronic lock.Power supply 14 with
CPU12 is connected at least one lock driving circuit, for powering for CPU12 and at least one lock driving circuit 16.CPU12 with
Setting having time clamps down on circuit 18 between at least one lock driving circuit 16, and the time clamps down on circuit 18 for limiting opening for electronic lock
Lock the time;Power supply also clamps down on circuit power supply for the time.
The embodiment of the present invention between CPU12 and lock driving circuit 16 by setting the time to clamp down on circuit 18, time pincers
Circuit 18 processed reduces lock duration of the driving circuit to electronic lock output current, so as to overcome because exporting electricity to electronic lock
Duration of stream is long and the problem of burn electronic lock.
In an optional embodiment, can specifically it include as shown in Fig. 2, the time clamps down on circuit 20:Charge-discharge circuit
22 and shaping circuit 24.Wherein, charge-discharge circuit 22 is used for the duration of control signal that CPU is controlled to export.Shaping circuit
24 are used to the output signal of charge-discharge circuit being shaped as square-wave signal.
In this embodiment, charge-discharge circuit 22 by CPU export control signal duration control safety when
Between in the range of.Then, shaping circuit 24 is used to the output signal of charge-discharge circuit being shaped as square-wave signal, and by rectangular wave
Signal is exported to lock driving circuit, to drive electronic lock, so that it is guaranteed that exporting the duration to the electric current of electronic lock in safety
In time range, and then avoid the phenomenon that burning electronic lock.
Circuit is clamped down on the time is described in detail with a preferred embodiment below, to more fully understand the present invention.
As shown in figure 3, the control signal of CPU outputs is exported to the anode of capacitance CT4.When control signal is become from low level
After lasting high level, this moment, the both ends of capacitance CT4 have no voltage difference, and 2 feet of buffer U9 are that can obtain high electricity this moment
Ordinary mail number.With continuing for time, due to the presence of R84, the voltage of capacitance CT4 right ends can be caused slowly to decline.Buffer
The 4th pin of U9 is 3.3V.When the voltage of CT4 capacitance right ends is less than 0.99V (3.3V*0.3=0.99V), buffer U9
Output can be lower by height.Due to the presence of capacitance CT4 and resistance R84, a duration of charge is formd, and then is ensured slow
The high level output time for rushing device U9 is not more than 1 second (time T ≈ R*C=100K*10uF).The 2 foot waveforms of buffer U9 are such as
Shown in Fig. 4.Wherein, Vc represents voltage;E represents the voltage of 2 feet of buffer U9 when control signal becomes high level from low level;
T represents the time.
Due to the presence of capacitance CT4 and resistance R84, therefore the 2 foot waveforms of buffer U9 are not suitable for being directly output to lock driving
Circuit, thus need by buffer U9 be shaped as rectangular wave export driving circuit to lock.Preferably, the duration of rectangular wave exists
1s-2s can reliably unlock.
When CPU is simultaneously emitted by multiple control signal, and electronic lock is removed out with driving lock driving circuit, power supply power consumption can be caused
It sharply increases or even burns power supply.
For above-mentioned consideration, the embodiment of the present invention also provides a kind of lock control circuit 50.As shown in figure 5, power supply 54 with
CPU51, time clamp down on circuit 52 and lock driving circuit 55,56 is electrically connected, for powering for CPU51 and lock driving circuit 55,56;
Time clamps down on circuit 52 and is arranged between CPU51 and lock driving circuit 55,56.It is more in the control signal driving of CPU51 output multi-channels
In the case of a lock driving circuit 55,56, one selector of multiselect is provided between CPU51 and multiple lock driving circuits 55,56
53, CPU51 to one selector of multiselect, 53 output address selection signal, and one selector 53 of multiselect is according to from the address that CPU51 is received
Selection signal selects to control signal all the way from multi-way control signals, and sends control signals to corresponding with control signal
Lock driving circuit 55,56;Power supply 54 is also powered for one selector 53 of multiselect.
The embodiment of the present invention by CPU51 with it is multiple lock driving circuits 55,56 between be provided with one selector 53 of multiselect,
It ensures that one and only one lock driving circuit of synchronization obtains control signal (i.e. unlocking signal), burns electricity so as to overcome
The problem of source.
If using power supply directly to lock drive circuitry, export driving circuit to lock transient current it is excessive, together
When the pressure drop that also results in supply line it is excessive, so as to reduce power supply efficiency.
For this purpose, the embodiment of the present invention also provides a kind of lock control circuit.As shown in fig. 6, lock control circuit 60 can include
CPU61, at least one lock driving circuit 63, power supply 64 and time clamp down on circuit 62.Wherein, CPU61 controls signal for exporting,
Driving circuit 63 is locked with control.At least one lock driving circuit 63 is used to control unlatching/closing of electronic lock.Power supply 64 with
CPU61, time clamp down on circuit 62 and at least one lock driving circuit 63 is electrically connected, for clamping down on 62 and of circuit for CPU61, time
At least one lock driving circuit 63 is powered.Time clamps down on circuit 62 and is arranged between CPU61 and at least one lock driving circuit 63,
For limiting the uncaging time of electronic lock.In addition, power supply is equipped with DC-DC Voltage stabilizing modules 641, in DC-DC Voltage stabilizing modules 641 and extremely
Transient state current foldback circuit 65 is additionally provided between a few lock driving circuit 63.
The pressure drop in supply line is excessive, powers and imitates by the way that DC-DC Voltage stabilizing modules 641 is set to solve for the embodiment of the present invention
The problem of rate is low also by setting transient state current foldback circuit 65, has achieved the purpose that transient state overcurrent protection.
Specifically, as shown in fig. 7, transient state current foldback circuit 70 can specifically include:Current sampling circuit 71, sampling electricity
Press decision circuitry 72, phase inverter 73 and switching circuit 74.Wherein, current sampling circuit 71 is used for the current signal exported to power supply
It is sampled, and bias voltage is provided to switching circuit 74.Sampled voltage decision circuitry 72 is electrically connected with current sampling circuit, is used
In the current signal that current sampling circuit acquires is converted into voltage signal.Phase inverter 73 is electrically connected with sampled voltage decision circuitry
It connects, the voltage signal for being exported to sampled voltage decision circuitry carries out reverse phase processing.Switching circuit 74 respectively with current sample
Circuit and phase inverter electrical connection, for disconnecting the electricity between the power supply and at least one lock driving circuit in transient state overcurrent
Road.
Transient state current foldback circuit is described in detail with a preferred embodiment below.
As shown in figure 8, current sampling circuit is made of resistance R63, resistance R64 and resistance R65.Sampled voltage decision circuitry
Including transistor Q1, resistance R66, resistance R71, resistance R77, diode D52, capacitance C37, resistance R78 and resistance R13.Reverse phase
Device is U5.Switching circuit includes field-effect transistor T28, field-effect transistor T27, resistance R1, resistance R20 and voltage-stabiliser tube D55.
In the present embodiment, the 12V voltages that the reception of transient state current foldback circuit is exported by DC-DC Voltage stabilizing modules.Work as overload
(such as:Electric current in circuit is more than 4 amperes of situation) when, the voltage at current sampling circuit both ends can be more than 0.6V (i.e. 0.15*
4=0.6 (V)), so as to which the voltage between the B poles-E poles of transistor Q1 be made to be more than 0.6V, and then transistor Q1 is caused to be on
State.The voltage at C37 both ends can be risen to by 0V close to 12V by resistance R71 and diode D52.At this point, phase inverter is (preferably
For schmitt inverter) input be high level, it exports as low level, the low level that phase inverter exports leads to field-effect transistor
T28 and field-effect transistor T27 cut-offs, so as to disconnect switching circuit, and then achieve the purpose that transient protective.
Further, as shown in figure 9, on the basis of above-mentioned embodiment illustrated in fig. 6, lock control circuit 60 can also be in transient state
Current foldback circuit 66 at a slow speed are provided between current foldback circuit 65 and at least one lock driving circuit 63.
Preferably, current foldback circuit 66 is resettable fuse at a slow speed.
Figure 10 schematically illustrates transient state current foldback circuit and at a slow speed current foldback circuit.Wherein, it is steady from DC-DC
The 12V of die block is exported by transient state current foldback circuit and at a slow speed current foldback circuit to lock driving circuit.When in circuit
Electric current sustained overload (such as:Electric current be 3.7 amperes) in the case of, F2 more than certain time (such as:2 seconds) when voluntarily melt
It is disconnected, so as to play the role of protection.After the factor of overload is eliminated, F2 can voluntarily restore.
In a preferred embodiment, the embodiment of the present invention provides a kind of lock control circuit for electronic lock, including
CPU, at least one lock driving circuit, power supply, time clamp down on circuit, one selector of multiselect, transient state current foldback circuit and at a slow speed
Current foldback circuit.Wherein, power supply is provided with DC-DC Voltage stabilizing modules, power supply be used for for CPU, at least one lock driving circuit, when
Between clamp down on circuit, one selector of multiselect, transient state current foldback circuit and at a slow speed current foldback circuit power.Time clamps down on circuit and sets
It puts between CPU and at least one lock driving circuit, and the uncaging time for limiting electronic lock.Time clamps down on circuit and includes:
Charge-discharge circuit and shaping circuit.Wherein, charge-discharge circuit is used for the duration of control signal that CPU is controlled to export;Shaping
Circuit is used to the output signal of charge-discharge circuit being shaped as square-wave signal.One selector of multiselect is arranged on CPU and multiple locks
Between driving circuit.In the case of the multiple lock driving circuits of CPU output multi-channels control signal driving, CPU is configured as to more
Select a selector output address selection signal;One selector of multiselect is configured as according to the address signal received from CPU, from
It selects to control signal all the way in multi-way control signals, and sends control signals to lock driving circuit corresponding with control signal.
Transient state current foldback circuit is arranged between the DC-DC Voltage stabilizing modules of power supply and at least one lock driving circuit.Wherein, transient state mistake
Stream protection circuit includes:Current sampling circuit, sampled voltage decision circuitry, phase inverter and switching circuit, current sampling circuit are used
It is sampled in the current signal that power supply exports, and bias voltage is provided to switching circuit;Sampled voltage decision circuitry and electricity
Sample circuit electrical connection is flowed, for the current signal that current sampling circuit acquires to be converted into voltage signal;Phase inverter and sampling
Voltage decision circuitry is electrically connected, and the voltage signal for being exported to sampled voltage decision circuitry carries out reverse phase processing;Switching circuit
It is electrically connected respectively with current sampling circuit and phase inverter, in the deenergization in transient state overcurrent and at least one lock driving electricity
Circuit between road.Current foldback circuit is arranged between transient state current foldback circuit and at least one lock driving circuit at a slow speed.
In addition, the embodiment of the present invention also provides a kind of control circuit with above-mentioned lock control circuit.The control circuit includes
Main control circuit, from control circuit and lock control circuit.Wherein, main control circuit is electrically connected with from control circuit, for sending electricity
Press signal.It is electrically connected respectively with main control circuit and lock control circuit from control circuit, for receiving the electricity of main control circuit transmission
Signal is pressed, and voltage signal is converted into current signal, the current signal is then delivered to lock control circuit.
Explanation in relation to lock control circuit can be found in the related description of above-mentioned lock control circuit embodiments, and details are not described herein.
In addition, the embodiment of the present invention also provides a kind of express delivery cabinet with above-mentioned control circuit.
It will be understood by those skilled in the art that the express delivery cabinet further includes some other known features, such as processor, storage
Device etc., details are not described herein.
It should be pointed out that another embodiment can also be applied to the details of one embodiment description.
The technical solution provided above the embodiment of the present invention is described in detail.Although it applies herein specific
A example the principle of the present invention and embodiment are expounded, still, the explanation of above-described embodiment is only applicable to help to manage
Solve the principle of the embodiment of the present invention;Meanwhile to those skilled in the art, embodiment according to the present invention, is being embodied
It can be made a change within mode and application range.
It, can also be into it should be noted that the block diagram being referred to herein is not limited solely to form shown in this article
Row divides and/or combination.
It should be noted that:Label and word in attached drawing are intended merely to be illustrated more clearly that the present invention, are not intended as to this
The improper restriction of invention protection domain.
Term " comprising " or any other like term are intended to cover non-exclusive inclusion, so that including a system
Process, method, article or the equipment/device of row element not only includes those elements, but also including being not explicitly listed
Other elements either further include these processes, method, article or the intrinsic element of equipment/device.
Present invention is not limited to the embodiments described above, and in the case of without departing substantially from substantive content of the present invention, this field is common
Any deformation, improvement or the replacement that technical staff is contemplated that each fall within protection scope of the present invention.