CN209327517U - A kind of load detecting circuit and electronic equipment - Google Patents
A kind of load detecting circuit and electronic equipment Download PDFInfo
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- CN209327517U CN209327517U CN201821858048.6U CN201821858048U CN209327517U CN 209327517 U CN209327517 U CN 209327517U CN 201821858048 U CN201821858048 U CN 201821858048U CN 209327517 U CN209327517 U CN 209327517U
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Abstract
The utility model belongs to load detecting technical field more particularly to a kind of load detecting circuit and electronic equipment.Load circuit is accessed in such a way that setting sample circuit is in parallel with the load, load detecting circuit and silicon-controlled one end will not be made hanging when load is opens a way, and level signal can be provided for load detecting circuit, so that it is detectable to detect silicon-controlled working condition, it avoids the load detecting circuit caused by load open circuit and silicon-controlled one end vacantly due to load circuit is made to be this security risk of nondeterministic statement, improve whole security performance.
Description
Technical field
The utility model relates to load detecting technical field more particularly to a kind of load detecting circuits and electronic equipment.
Background technique
Currently, load control is the final purpose of all kinds of electronic intelligence control products, wherein it is silicon-controlled as switch, it bears
Load and controllable silicon in serial connection simultaneously access power supply, to realize the control to load.
In the process of implementing the utility model, the existing technology has at least the following problems for discovery by utility model people:
When load circuit breaks down, power supply can not confirm load or silicon-controlled shape also always to provide power supply
State is greatly threatened to safety belt.
Utility model content
The utility model aims to solve the problem that conventional load circuit detection mode in load open circuit or silicon-controlled failure, loads
Or silicon-controlled state the problems such as can not confirming and causing security risk, a kind of load detecting circuit and electronic equipment are provided,
Technical solution is as follows:
In order to solve the above technical problems, the utility model embodiment provides following technical solution:
In a first aspect, the utility model embodiment provides a kind of load detecting circuit, for detecting the work of load circuit
State, the load circuit include silicon-controlled and load, and the described silicon-controlled and load connects, the load detecting circuit packet
It includes:
Sampling module, the sampling module and the load connect, for sample load current and by the load it is electric
Circulation changes level signal into, the load current include sampling flow through the first electric current of the load or do not flow through the load and
The second electric current of the load detecting circuit is flowed through, second electric current is less than the silicon-controlled maintenance electric current；
Control module, the control module and the sampling module and silicon-controlled connection, for being sent out to the sampling module
It send driving signal and the level signal for receiving sampling module transmission determines institute according to the driving signal and the level signal
State the working condition of the silicon-controlled or described load.
Further, the sampling module includes: the sampled point road in parallel with the load, and with the sample circuit
And the shaping circuit of control module connection；
The sample circuit is used to obtain the load current of the load detecting circuit sampling；
The shaping circuit is used to the load current being converted into level signal.
Further, the sample circuit includes: first resistor, and one end of the first resistor is another with the load
End connects and access power supply, the other end are connect with one end of the load.
Further, the shaping circuit includes: second resistance, first diode, the second diode and first capacitor；
One end of the second resistance is connect with one end of the load, the other end of the second resistance and described first
The anode connection of the cathode of diode and second diode, the plus earth of the first diode, the described 2nd 2
The cathode of pole pipe accesses forward voltage, one end of the first capacitor and the control module and the other end of second resistance connects
It connects, the other end ground connection of the first capacitor.
Further, the load detecting circuit further include:
Circuit is protected, the protection is electrically connected between the silicon-controlled control terminal and control module, for preventing
Driving voltage silicon-controlled is damaged to described.
Further, the protection circuit includes 3rd resistor and the second capacitor, one end of second capacitor with
The other end of the 3rd resistor connects, and the other end of second capacitor is connect with the silicon-controlled control terminal, and described the
One end of three resistance connects the control module.
Further, the load detecting circuit further include:
Capacitance-resistance voltage reduction circuit, the capacitance-resistance voltage reduction circuit are connect with the other end of the load, for power supply signal into
Row decompression, pressure stabilizing and filtering processing；
Further, the capacitance-resistance voltage reduction circuit includes the 4th resistance, third capacitor, the 5th diode, zener diode
And electrolytic capacitor；One end of 4th resistance is connect with power input, and the other end is connect with one end of the third capacitor,
The other end of the third capacitor is connect with the anode of the cathode of the zener diode and the 5th diode, the pressure stabilizing two
The plus earth of pole pipe, the cathode of the 5th diode are connect with the anode of the electrolytic capacitor, and the electrolytic capacitor is just
Forward voltage, the cathode ground connection of the electrolytic capacitor are accessed in pole.
Further, the load detecting circuit further include:
Zero cross detection circuit, the zero cross detection circuit are connect with the other end of the load and the control module,
For carrying out zero passage detection to power supply signal, and the zero cross signal that will acquire is sent to processing module；
The zero cross detection circuit includes 3rd resistor, third diode and the 4th diode；The 3rd resistor
One end is connect with power input, the cathode and the 4th diode of the other end of the 3rd resistor and the third diode
Anode connection, the anode of third diode cathode ground connection, the 4th diode is connect with the control module, described
The cathode of 4th diode accesses forward voltage.
The third aspect, the utility model embodiment provide a kind of electronic equipment, comprising:
Shell；And
Load detecting circuit as the aforementioned, the load detecting circuit are set in the shell.
The beneficial effect of the utility model embodiment is: load detecting circuit and electronic equipment provided in this embodiment,
By obtaining the load current of the load detecting circuit sampling and by the load to the silicon-controlled transmission driving signal
The level signal that electric current is converted into, the load current include that sampling flows through the first electric current of the load or do not flow through described negative
The second electric current of the load detecting circuit is carried and flows through, second electric current is less than the silicon-controlled maintenance electric current, then root
According to the driving signal and the level signal, the working condition of the described silicon-controlled or described load is determined.Therefore, it can be realized
The detection of load and silicon-controlled state, improves whole security performance.
Detailed description of the invention
Fig. 1 is the application scenarios schematic diagram of load detecting provided by the embodiment of the utility model；
Fig. 2 is a kind of structural schematic diagram of load detecting circuit provided by the embodiment of the utility model；
Fig. 3 is the structural schematic diagram of another load detecting circuit provided by the embodiment of the utility model；
Fig. 4 is the structural schematic diagram of another load detecting circuit provided by the embodiment of the utility model.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only to explain this
Utility model is not used to limit the utility model.
It should be noted that each feature in the utility model embodiment can be combined with each other if do not conflicted, exist
Within the protection scope of the utility model.In addition, though having carried out functional module division in schematic device, in flow charts
Logical order is shown, but in some cases, it can be with the sequence in the module division being different from device or flow chart
Execute shown or described step.Furthermore the printed words such as " first ", " second " used by the utility model, " third " are not
Data and execution order are defined, are distinguished to function and the essentially identical identical entry of effect or similar item.
When realizing intelligent product control, realized using the conducting or shutdown of switching component is to the control of load
An essential important link.For example, many home wiring control plates are usually to be realized using silicon-controlled on-off pair at present
The control of load, but due to load and it is silicon-controlled itself be all electronic component, there is failure and risk out of control, and these
Critical component is likely to result in great property loss or casualties once failure is perhaps out of control, and therefore, it is necessary to negative
It carries circuit and one load detecting circuit realization load and silicon-controlled monitoring is set.
In general, load detecting circuit is typically provided with sampling module to obtain the current signal in load circuit, and should
Detected value is converted into voltage signal, and the voltage signal that the signal and load detecting circuit further according to load circuit input obtain judges
The state of load and switching component in load circuit.Single-chip microcontroller is generallyd use in load detecting circuit to obtain voltage letter
Number.Also, sampling module is generally connected serially in load circuit by technical solution documented by prior art center, negative convenient for obtaining
Carry the electric current in circuit, and this kind of detection mode be when load is open circuit when the silicon-controlled failure of person, load detecting circuit is then in
Vacant state is in unknown to load and silicon-controlled particular state, and power supply also provides power supply to load always, then deposits
In certain security risk.
Specifically, with reference to the accompanying drawing, the utility model embodiment is further elaborated.
Attached drawing 1 is the application scenarios schematic diagram for the load detecting that traditional technology provides.Wherein, include: in the application environment
Power supply, load, silicon-controlled and load detecting module.
Wherein, circuit, silicon-controlled realization on-off action, silicon-controlled control terminal is connected in power supply, load and silicon-controlled formation
Further include access driving signal, according to driving signal realize on or off working condition, thus using itself shutdown with
The control to load is realized in conducting.Load detecting module is usually made of sampling module and detection module, and sampling module is generally
Resistance, inductance etc. can be realized the component of partial pressure effect, and detection module is usually single-chip microcontroller, carry out signal to sampling module and obtain
It takes, and the signal that the signal according to acquired in detection module and conducting circuit are inputted, judges the silicon-controlled work shape with load
State.
Wherein, it should be noted that load detecting circuit provided by the embodiment of the utility model can also be opened up further
It opens up in other suitable application environments, and is not limited to application environment shown in Fig. 1.In actual application, the application
Environment can also include more objects.
Fig. 2 is a kind of structural schematic diagram of load detecting circuit provided by the embodiment of the utility model；Specifically, it please refers to
Fig. 2 and Fig. 3, a kind of load detecting circuit, for detecting the working condition of load circuit, the load circuit includes silicon-controlled T
It is connect with load L, the silicon-controlled T with the load L, the load detecting circuit includes sampling module 10 and control module
30。
The sampling module 10 is connect with the load L, for sampling load current and converting the load current
At level signal, the load current includes that sampling flows through the first electric current of the load or do not flow through the load and flow through institute
The second electric current of load detecting circuit is stated, second electric current is less than the silicon-controlled maintenance electric current；
In some embodiments, the load current includes the first electric current and the second electric current, and the first electric current is from power flow
The electric current obtained after loading, the second electric current be do not flow through load and directly through load detecting circuit after electricity obtained
Stream, it should be noted that the sampling module 10 is in parallel with the load L, the load L failure and can not by bear
Carry L and formed conducting circuit when, power supply can directly through the sampling module 10, thus obtain with flow through load L after obtained
Different types of second electric current of the first electric current.Further, the overall electrical resistance of the sampling module 10, which is significantly larger than, loads L's
Resistance, so that the resistance value of the module can on influence caused by the overall current of load circuit when load L is normal
It ignores (because the module is in parallel with load).
Further, second electric current is less than the silicon-controlled maintenance electric current, it should be noted that so-called silicon-controlled
The maintenance electric current of T keeps the minimum current of silicon-controlled T forward conduction, maintain electric current when the electric current for flowing through silicon-controlled T is less than
When, even if meeting silicon-controlled T triggering and conducting condition, silicon-controlled T can be also automatically closed.In other words, it can not will be loaded in load L
When circuit forms the circuit of conducting, the electric current that power supply flows through after loading L detection circuit is not enough to reach the maintenance electricity of silicon-controlled T
Stream, and even if the driving signal of silicon-controlled T is to indicate silicon-controlled T work on state, which also turns off and then locates
In off state.On the one hand play the role of the silicon-controlled T of protection, on the other hand realized using this characteristic of silicon-controlled T to load L
Detection identification it is higher, even if load L be in open-circuit condition, detection circuit, which can also obtain, to be loaded or silicon-controlled T
Specific works state improves whole security performance.
In some embodiments, sampling module 10 acquires load current and has diversified forms, can be with are as follows: when load L with can
Control silicon T is in normal working condition, and in silicon-controlled T conducting, sampling module 10 acquires the first electric current for flowing through load L；
And when load L is in open circuit, and when silicon-controlled T is in the conductive state, the acquisition of sampling module 10 do not flow through load L and directly through
Second electric current of load detecting circuit.
The control module 30 is connect with the sampling module 10 and silicon-controlled T respectively, is used for the sampling module 10
It sends driving signal and receives the level signal of the transmission of sampling module 10, according to the driving signal and the level signal, really
The working condition of the fixed silicon-controlled T or described load L.
In the present embodiment, driving signal is generated by the control module 30 of realization control action, is sent to silicon-controlled T
Control terminal, control is realized in conducting to silicon-controlled T or shutdown.Driving signal generally includes high level or low level, example
Such as, when silicon-controlled T is normal working condition, when driving signal is high level, silicon-controlled T is on state, works as driving
When signal is low level, silicon-controlled T is off state；The driving signal is used to indicate the silicon-controlled T work in conducting shape
State or off state namely driving signal include Continuity signal or pick-off signal, and Continuity signal refers to that in silicon-controlled T be normal
Working condition when, drive silicon-controlled T in the conductive state, pick-off signal refer to silicon-controlled T be normal working condition when,
Drive silicon-controlled T to be in off state, in general, Continuity signal be high level and it is low level one of them, pick-off signal is then
For another.It should be noted that sending driving signal to the silicon-controlled T, the driving signal is used to indicate described controllable
Silicon T works on state or off state, is carried out when which kind of state the silicon-controlled T of no determination and load L are,
That is driving signal at this time will centainly make silicon-controlled T be in the corresponding working condition of the driving signal；As an example
Son, driving signal at this time are to indicate that the silicon-controlled T works in off state a kind of this signal, and silicon-controlled T at this time is
A kind of " short-circuit condition " this abnormal working condition, silicon-controlled T at this time can't work according to driving signal in cut-off
Working condition, and it is in short-circuit condition.
In some embodiments, control module 30 has multiple signal input output end mouths, multiple signal input output ends
Mouth is for reception and output signal, to realize the signal interaction with other execution terminals or server.Specifically, this implementation
Control module 30 is used to export the driving signal of silicon-controlled T and receives the zero cross signal of power supply and the level of load circuit in example
Signal plays the role of driving and protection load circuit, and realizes detection to load circuit.
Referring to Fig. 2, the sampling module 10 includes: the sample circuit 12 in parallel with the load L, and adopted with described
The shaping circuit 11 that sample circuit 12 and control module 30 connect；
The sample circuit 12 is used to sample the load current in the load circuit；
The shaping circuit 11 is used to the load current being converted into level signal.
In the present embodiment, sample circuit 12 accesses load circuit, and sampling electricity by the way of in parallel with load L
The resistance value on road 12 can be far longer than the resistance value of load L, so that in load L sample circuit 12 in parallel to caused by load circuit
It influences negligible.Also, when loading L open circuit, because the sample circuit 12 and load L are parallel connection, then load circuit
Will form power supply-sample circuit-it is silicon-controlled-circuit of ground wire, lead to detection electricity because loading L and being open-circuit condition without making
Road and one end of silicon-controlled T are vacant state, can not detect or obtain silicon-controlled T or the state of other components, make
It obtains load circuit entirety and all forms security risk for uncertain state.
It should be noted that because the utility model sample circuit 12 relative to load circuit be resistance value it is biggish another
Load, and it is the maintenance electric current less than silicon-controlled T that power supply, which is not passed through load and flows through the electric current after sample circuit 12, and when flowing through
When the electric current at the silicon-controlled both ends T is less than maintenance electric current, no matter whether the driving signal of the control terminal input of silicon-controlled T is that instruction should
Silicon-controlled T is the operating mode of conducting, and silicon-controlled T is off state, and is directly converted into after the sampled module 10 of electric current
Level signal, the level signal that control module 30 obtains at this time is periodic low and high level signal.The present embodiment is born
It carries detection circuit and serves as load effect when loading L and being open-circuit condition, can also further detect the working condition of silicon-controlled T, and
It will not lead to silicon-controlled one end T because of load L for open-circuit condition and load detecting circuit is in vacant state, it can not be to load
The working condition in circuit is detected, this security risk is eliminated, and improves whole security performance.
Specifically, attached drawing 2 is please referred to, the sample circuit 12 includes: first resistor R1, one end of the first resistor R1
It is connect and accesses power supply with the other end of the load L, the other end is connect with one end of the load L.
Wherein, sample circuit 12 and not merely for single resistance constitute, can also be multiple and different connection types resistance group
At being also not merely confined to this type of resistance, can also be inductance or the biggish component of other resistance values.The sample circuit 12
Play the role of current limliting when loading L and being open-circuit condition, the electric current of load circuit is pulled low to the maintenance electric current of silicon-controlled T, is made
Obtaining the silicon-controlled T is off state, to play the role of protection.
Specifically, the shaping circuit 11 includes: second resistance R2, first diode D1, the second diode D2 and first
Capacitor C1；
One end of the second resistance R2 is connect with one end of the load L, the other end of the second resistance R2 and institute
The anode connection of the cathode and the second diode D2 of first diode D1 is stated, the anode of the first diode D1 connects
Ground, the cathode of the second diode D2 access forward voltage, one end of the first capacitor C1 and the control module 30 with
And the other end connection of second resistance R2, the other end ground connection of the first capacitor C1.
Further, the shaping circuit 11 can also specifically be divided into current limiting unit, clipping unit and filter unit；
Current limiting unit includes that the second resistance R2 for limiting electric current prevents electric current is excessive from making to load detecting circuit
At damage；
Clipping unit includes first diode D1 and the second diode D2, for limiting voltage magnitude；
Filter unit includes first capacitor C1, for being filtered to voltage signal.
The level signal that the shaping circuit 11 of the present embodiment is used to flow through in load circuit carries out Shape correction, specific to wrap
Current limliting processing, amplitude limiting processing and filtering processing are included, there is no it when so that signal being sent to control module in level signal
His impurity can be identified clearly by corresponding controller, to improve the accuracy of detection.
Specifically, attached drawing 4, the load detecting circuit are please referred to further include:
Circuit 20 is protected, the protection circuit 20 is connected between the control terminal and control module 30 of the silicon-controlled T, is used
In preventing driving voltage from damaging to the silicon-controlled T；
The protection circuit 20 includes 3rd resistor R3 and the second capacitor C2, one end of the second capacitor C2 and described the
The other end of three resistance R3 connects, and the other end of the second capacitor C2 is connect with the control terminal of the silicon-controlled T, the third
One end of resistance R3 connects the control module 30.
Specifically, attached drawing 4, the load detecting circuit are please referred to further include:
Capacitance-resistance voltage reduction circuit 50, the capacitance-resistance voltage reduction circuit 50 is connect with the other end of the load L, for believing power supply
It number is depressured, pressure stabilizing and filtering processing；
The capacitance-resistance voltage reduction circuit 50 includes the 4th resistance R4, third capacitor C3, the 5th diode D5, zener diode D6
And electrolytic capacitor C4；One end of the 4th resistance R4 is connect with power input, and the one of the other end and the third capacitor C3
The anode of end connection, the other end of the third capacitor C3 and the cathode of the zener diode D6 and the 5th diode D5 are even
It connects, the plus earth of the zener diode D6, the cathode of the 5th diode D5 and the anode of the electrolytic capacitor C4 connect
It connects, the anode access forward voltage of the electrolytic capacitor C4, the cathode ground connection of the electrolytic capacitor C4.
Specifically, the load detecting circuit further include:
Zero cross detection circuit 40, the other end and the control module of the zero cross detection circuit 40 with the load L
30 connections, for carrying out zero passage detection to power supply signal, and the zero cross signal that will acquire is sent to control module 30；
The zero cross detection circuit includes 3rd resistor R3, third diode D3 and the 4th diode D4；The third
One end of resistance R3 is connect with power input, the cathode of the other end of the 3rd resistor R3 and the third diode D3 with
And the 4th diode D4 anode connection, the third diode D3 plus earth, the anode of the 4th diode D4 and institute
The connection of control module 30 is stated, the cathode of the 4th diode D4 accesses forward voltage.
It should be noted that the following are the courses of work of the load detecting circuit:
It is specific as follows to state four kinds of situations:
When the driving signal instruction silicon-controlled T work is on state, and level signal is periodically high
When low level, silicon-controlled T is normal working condition and the load L is open-circuit condition；
When the driving signal instruction silicon-controlled T work is on state, and level signal is the low of duration
When level, the silicon-controlled T is short-circuit perhaps breakdown conditions and load nondeterministic statement or the silicon-controlled T are normal
Working condition and the load L are normal operating conditions；
When the driving signal instruction silicon-controlled T work is in off state, and level signal is periodically high
When low level, the silicon-controlled T is normal working condition and load L nondeterministic statement；
When the driving signal instruction silicon-controlled T work is in off state, and level signal is the low of duration
When level, the silicon-controlled T is short circuit or breakdown conditions and load L is in nondeterministic statement；
It should be noted that load nondeterministic statement refers to that load L can be normal operating conditions be also open-circuit condition, when
Silicon-controlled T can be that normal condition is also short circuit or when breakdown conditions, then need preferentially to determine the working condition of silicon-controlled T；
The silicon-controlled T first should be repaired or be replaced when silicon-controlled T is short-circuit perhaps breakdown conditions, reaches normal work in silicon-controlled T
After making state, the working condition of further detection load L may be selected；When silicon-controlled T be normal working condition, can be directly into one
The working condition of step detection load L.
For example, when detecting the driving signal instruction silicon-controlled T work on state, and level signal is to hold
When the low level of continuous property, there are two kinds of situations for the state of load L and silicon-controlled T:
1. the silicon-controlled T is short circuit or breakdown conditions, and loading L is nondeterministic statement, i.e. load L can be normal shape
State or open-circuit condition any state；
2. the silicon-controlled T is normal working condition and the load L is normal operating conditions；
When detecting this kind of situation, because the state of silicon-controlled T is uncertain, then need to further determine that the work of silicon-controlled T
Make state, when the working condition for detecting silicon-controlled T is normal working condition, then the testing result for loading the circuit L is corresponding
Second situation, when detecting that the working condition of silicon-controlled T for short circuit or breakdown conditions, then loads the testing result in the circuit L
The first corresponding situation.
In the present embodiment, the electricity obtained using the driving signal and load detecting circuit that obtain the circuit input load L
Ordinary mail number detects the working condition of load L and silicon-controlled T, it is ensured that it is hidden to avoid safety for the safety of load circuit
Suffer from.
It should be noted that it is silicon-controlled be normal working condition when, the driving signal is used to indicate described silicon-controlled
In off state, the level signal that load detecting circuit obtains is periodic low and high level for work, in other words, power supply letter
Number without silicon-controlled ground connection, but directly through load detecting circuit, and at this time because of a part of load detecting circuit and negative
Parallel connection is carried, even if load is uncertain working condition, the periodic height for also having no effect on load detecting circuit acquisition is electric
Flat level signal, and silicon-controlled working condition can be determined according to this characteristic.Preferentially determine silicon-controlled shape
State can be the subsequent working condition to load into providing reference frame, thus realize in load circuit to load with it is silicon-controlled
Accurate detection, eliminate due to silicon control state is indefinite caused by security risk.
In the present embodiment, the setting sample circuit mode in parallel with the load accesses load circuit, is to open in load
It will not make load detecting circuit and silicon-controlled one end hanging when road, and level letter can be provided for load detecting circuit
Number so that the silicon-controlled working condition of detection is detectable, caused by avoiding because of load open circuit load detecting circuit with can
The one end for controlling silicon vacantly makes load circuit be this security risk of nondeterministic statement, improves whole security performance.
The a kind of electronic equipment that the utility model embodiment also provides, comprising:
Shell；And
Load detecting circuit as the aforementioned, the load detecting circuit are set in the shell.
Since the embodiment and above-mentioned each embodiment are to be based on same design, under the premise of content does not conflict mutually,
The content of the embodiment can quote above-mentioned each embodiment, and this will not be repeated here.
The apparatus embodiments described above are merely exemplary, wherein described, unit can as illustrated by the separation member
It is physically separated with being or may not be, component shown as a unit may or may not be physics list
Member, it can it is in one place, or may be distributed over multiple network units.It can be selected according to the actual needs
In some or all of the modules achieve the purpose of the solution of this embodiment.
Claims (10)
1. a kind of load detecting circuit, for detecting the working condition of load circuit, the load circuit include it is silicon-controlled with it is negative
It carries, the silicon-controlled connection with the load, which is characterized in that the load detecting circuit includes:
Sampling module, the sampling module and the load connect, for sampling load current and turning the load current
Change level signal into, the load current includes that sampling flows through the first electric current of the load or do not flow through the load and flow through
Second electric current of the load detecting circuit, second electric current are less than the silicon-controlled maintenance electric current；
Control module, the control module and the sampling module and silicon-controlled connection are driven for sending to the sampling module
Dynamic signal simultaneously receives the level signal of sampling module transmission, can described in determination according to the driving signal and the level signal
Control the working condition of silicon or the load.
2. load detecting circuit according to claim 1, it is characterised in that:
The sampling module includes: the sample circuit in parallel with the load, and with the sample circuit and the control mould
The shaping circuit of block connection；
The sample circuit is used to sample the load current in the load circuit；
The shaping circuit is used to the load current being converted into level signal.
3. load detecting circuit according to claim 2, it is characterised in that: the sample circuit includes: first resistor, institute
The one end for stating first resistor connect with the other end of the load and accesses power supply, and the other end of the first resistor is born with described
One end of load connects.
4. load detecting circuit according to claim 2, it is characterised in that: the shaping circuit includes: second resistance,
One diode, the second diode and first capacitor；
One end of the second resistance is connect with one end of the load, the other end of the second resistance and the one or two pole
The anode connection of the cathode of pipe and second diode, the plus earth of the first diode, second diode
Cathode access forward voltage, one end of the first capacitor connect with the other end of the control module and second resistance,
The other end of the first capacitor is grounded.
5. load detecting circuit according to claim 1, it is characterised in that: the load detecting circuit further include:
Circuit is protected, the protection is electrically connected between the silicon-controlled control terminal and control module, drives for preventing
Voltage silicon-controlled is damaged to described.
6. load detecting circuit according to claim 5, it is characterised in that: the protection circuit includes 3rd resistor and
One end of two capacitors, second capacitor is connect with the other end of the 3rd resistor, the other end of second capacitor and institute
Silicon-controlled control terminal connection is stated, one end of the 3rd resistor connects the control module.
7. load detecting circuit according to claim 1, it is characterised in that: the load detecting circuit further include:
Capacitance-resistance voltage reduction circuit, the capacitance-resistance voltage reduction circuit are connect with the other end of the load, for dropping to power supply signal
Pressure, pressure stabilizing and filtering processing.
8. load detecting circuit according to claim 7, it is characterised in that: the capacitance-resistance voltage reduction circuit includes the 4th electricity
Resistance, third capacitor, the 5th diode, zener diode and electrolytic capacitor；One end of 4th resistance and power input connect
It connects, the other end of the 4th resistance is connect with one end of the third capacitor, the other end of the third capacitor and described steady
Press the anode connection of the cathode and the 5th diode of diode, the plus earth of the zener diode, the five or two pole
The cathode of pipe is connect with the anode of the electrolytic capacitor, the anode access forward voltage of the electrolytic capacitor, the electrolytic capacitor
Cathode ground connection.
9. load detecting circuit according to claim 1, it is characterised in that: the load detecting circuit further include:
Zero cross detection circuit, the zero cross detection circuit connect with the other end of the load and the control module, are used for
Zero passage detection is carried out to power supply signal, and the zero cross signal that will acquire is sent to control module；
The zero cross detection circuit includes 3rd resistor, third diode and the 4th diode；One end of the 3rd resistor
It is connect with power input, the cathode and the 4th diode of the other end of the 3rd resistor and the third diode are just
Pole connection, the third diode cathode ground connection, the anode of the 4th diode are connect with the control module, and the described 4th
The cathode of diode accesses forward voltage.
10. a kind of electronic equipment characterized by comprising
Shell；And
Load detecting circuit as described in any one of claim 1 to 9, the load detecting circuit are set in the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821858048.6U CN209327517U (en) | 2018-11-12 | 2018-11-12 | A kind of load detecting circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821858048.6U CN209327517U (en) | 2018-11-12 | 2018-11-12 | A kind of load detecting circuit and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209327517U true CN209327517U (en) | 2019-08-30 |
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| CN201821858048.6U Active CN209327517U (en) | 2018-11-12 | 2018-11-12 | A kind of load detecting circuit and electronic equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114397833A (en) * | 2021-12-01 | 2022-04-26 | 深圳市联洲国际技术有限公司 | Load self-adaptive silicon controlled rectifier circuit and control method |
| CN115201554A (en) * | 2022-09-16 | 2022-10-18 | 中车工业研究院(青岛)有限公司 | No-load over-current detection circuit and no-load over-current detection system |
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2018
- 2018-11-12 CN CN201821858048.6U patent/CN209327517U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114397833A (en) * | 2021-12-01 | 2022-04-26 | 深圳市联洲国际技术有限公司 | Load self-adaptive silicon controlled rectifier circuit and control method |
| CN114397833B (en) * | 2021-12-01 | 2024-05-03 | 深圳市联洲国际技术有限公司 | Load self-adaptive silicon controlled rectifier circuit and control method |
| CN115201554A (en) * | 2022-09-16 | 2022-10-18 | 中车工业研究院(青岛)有限公司 | No-load over-current detection circuit and no-load over-current detection system |
| CN115201554B (en) * | 2022-09-16 | 2023-01-13 | 中车工业研究院(青岛)有限公司 | No-load overcurrent detection circuit and no-load overcurrent detection system |
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