CN206848381U - Load detecting circuit and its Weight detector - Google Patents
Load detecting circuit and its Weight detector Download PDFInfo
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- CN206848381U CN206848381U CN201720453257.1U CN201720453257U CN206848381U CN 206848381 U CN206848381 U CN 206848381U CN 201720453257 U CN201720453257 U CN 201720453257U CN 206848381 U CN206848381 U CN 206848381U
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Abstract
The utility model embodiment discloses a kind of load detecting circuit and Weight detector, and the load detecting circuit includes：With loading the sample circuit being connected；The bleeder circuit being connected with power supply and the sample circuit, the comparison circuit being connected with the output end of the bleeder circuit, the process circuit being connected with the output end of the power supply and the comparison circuit, and the controller being connected with the output end of the process circuit.The utility model load detecting circuit and its Weight detector can accurately detect the behaviour in service of load, and ensure the reliability of detection process.
Description
Technical field
Load detecting technical field is the utility model is related to, more particularly to a kind of load detecting circuit and load detecting dress
Put.
Background technology
At present, electronic cigarette is primarily used to substitute tradition fragrant mainly in some American-European developed country's use than wide
Cigarette.With the continuous improvement of China's living standard, people also pursue higher quality of life continuous, also gradually recognize smoking
Serious harm, smoking cessation progressively become a common understanding.So as this substitute of electronic cigarette, also gradually by people
Welcome.
Electronic cigarette has the same outward appearance with cigarette, has approximate taste, or even the taste than general cigarette with cigarette
Have more a lot, also like the same taste that can suction out cigarette of cigarette, it is mainly used in smoking cessation and cigarette substitute.Electronic cigarette is a kind of again
On-fuel cigarette class substituted type product, it has difference substantially with common cigarette, electronic cigarette do not burn, without tar, no
Containing that caused by the burning of common cigarette more than the 460 of respiratory system and disease of cardiovascular system can be caused to plant chemical substance, so as to remove
Carcinogen in common cigarette, other people will not be produced with harm and the pollution environment of " second-hand-cigarette ".
Present electronic cigarette be typically after load such as heating wire is installed, press the smoking that is set on electronic cigarette by
After key, the display screen of electronic cigarette can be lit, and user is so as to checking the relevant parameter information of heating wire.It is standby in electronic cigarette
During, if heating wire is removed, or during heating wire appearance loosening loose contact, existing electronic cigarette load-detecting system is not
It can immediately find and prompt heating wire removal or not mounted situation, therefore cause current load detecting process inconvenient for use,
Poor practicability, user's request can not be met.
Utility model content
The utility model provides a kind of load detecting circuit and its Weight detector, can accurately detect the use of load
Situation, and ensure the reliability of detection process.
The technical scheme is as follows：
The utility model provides a kind of load detecting circuit, and it includes：With loading the sample circuit being connected；With power supply and
The connected bleeder circuit of the sample circuit, the comparison circuit being connected with the output end of the bleeder circuit, with the power supply and
The connected process circuit of the output end of the comparison circuit, and the controller being connected with the output end of the process circuit.
Further, the bleeder circuit includes multiple sectional pressure elements, at least one point in the multiple sectional pressure element
Pressure element is connected with the power supply, the sample circuit and the comparison circuit, in the multiple sectional pressure element a partial pressure
One end ground connection of element.
Further, the sample circuit includes partial pressure unit, sampling resistor and the first filter capacitor, the partial pressure unit
One end be connected with the first filter capacitor, the other end of the partial pressure unit is connected with the sampling resistor；The sampling resistor
One end be connected with one end of the load, the other end of sampling resistor ground connection；The other end of the load with described point
Pressure unit is connected.
Further, the comparison circuit includes comparator, the first current-limiting resistance and the second filter capacitor；The comparator
Normal phase input end be connected with an output end of the bleeder circuit, the inverting input of the comparator and the bleeder circuit
Another output end be connected, the voltage end of the comparator is connected by first current-limiting resistance with power supply, also by described
Second filter capacitor is grounded, and the earth terminal ground connection of the comparator, the output end of the comparator is connected with the process circuit.
Further, the process circuit includes divider resistance, the second current-limiting resistance, voltage regulation resistance, pull down resistor, delay
Electric capacity, pulsed capacitance, transistor, the first diode, the second diode, the 3rd diode；The first end of the transistor passes through
The divider resistance is connected with the power supply, is also connected by the delay capacitor with the output end of the comparison circuit, described
Second end of transistor is connected by second current-limiting resistance with the power supply, and the 3rd end of the transistor is by under described
Pull-up resistor is grounded；One end of the pulsed capacitance is connected with the output end of the comparison circuit, the other end of the pulsed capacitance
It is grounded by the voltage regulation resistance, is also attached to the negative electrode of first diode；The plus earth of first diode；Institute
The anode for stating the second diode is connected with the negative electrode of first diode, anode and the transistor of the 3rd diode
The 3rd end be connected, the negative electrode of second diode and the 3rd diode is connected with the controller.
Further, the transistor is triode, and the first end, the second end and the 3rd end are respectively the transistor
Base stage, emitter and collector.
Further, the controller is MCU.
The utility model provides a kind of Weight detector, and it includes：Above-mentioned load detecting circuit.
The beneficial effect brought of technical scheme that the utility model embodiment provides is：
By the behaviour in service with loading the sample circuit being connected detection load, and according to the behaviour in service of load, partial pressure
Circuit exports corresponding first comparison voltage and the second comparison voltage to comparison circuit, comparison circuit pair respectively by two output ends
First comparison voltage and the second comparison voltage export corresponding control signal to process circuit after being compared, process circuit than
When control signal compared with circuit output is when installing load control signal or removes load control signal, generation control pulse letter
Number, and the control wave of generation is supplied to controller.So installing the moment of load and removing the moment of load,
Controller can receive pulse signal and be shown etc. with carrying out the detection of related load resistance and control display screen.So as to
The behaviour in service of accurate detection load, it is ensured that the reliability of detection process, and this detection circuit structure is simple, and cost is relatively low.
Described above is only the general introduction of technical solutions of the utility model, in order to better understand skill of the present utility model
Art means, and being practiced according to the content of specification, and in order to allow above and other purpose of the present utility model, feature
It can be become apparent with advantage, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, described in detail as follows.
Brief description of the drawings
Fig. 1 is the structured flowchart for the load detecting circuit that the utility model first embodiment provides；
Fig. 2 is the circuit diagram for the load detecting circuit that the utility model second embodiment provides.
Embodiment
Further to illustrate that the utility model is to reach the technological means and effect that predetermined purpose of utility model taken,
Below in conjunction with accompanying drawing and preferred embodiment, to according to the utility model proposes load detecting circuit and its Weight detector its
Embodiment, structure, feature and effect, describe in detail as after.
Relevant of the present utility model foregoing and other technology contents, feature and effect, it is following coordinate with reference to schema compared with
Good embodiment can be clearly presented in describing in detail.By the explanation of embodiment, when can be to the utility model up to
The technological means and effect taken into predetermined purpose are able to more go deep into and specific understanding, but institute's accompanying drawings are only to provide
With reference to purposes of discussion, not be used for the utility model is any limitation as.
First embodiment
Fig. 1 is the structured flowchart for the load detecting circuit that the utility model first embodiment provides.The load detecting electricity
Road can accurately detect load, such as the behaviour in service of the electric loading such as heating wire, heat-generating pipe, bulb, and it is simple in construction, into
This is relatively low.Fig. 1 is refer to, the load detecting circuit of the present embodiment includes：Sample circuit 9, bleeder circuit 10, comparison circuit 11,
Process circuit 12, controller 13.
Specifically, sample circuit 9 is electrical connected with load 15 and bleeder circuit 10, and shape is used for sampling load 15
Condition, and the behaviour in service for loading 15 is supplied to bleeder circuit 10.
Bleeder circuit 10, it is electrical connected with a power supply U1, comparison circuit 11, for the behaviour in service according to load 15, leads to
Cross two output ends and export corresponding first comparison voltage and the second comparison voltage respectively to comparison circuit 11.
Wherein, load 15 behaviour in service and (just load is installed when can include non-installation load, install load
When upper), installation load (load mounted complete a period of time), will load when removing when load removal (i.e. just will)
Etc. behaviour in service.Specifically, if the behaviour in service of load 15 is installation load, installs load, bleeder circuit 10 is defeated
The first comparison voltage gone out can be less than the second comparison voltage, if the behaviour in service of load 15 is moved for non-installation load, by load
Except when, then bleeder circuit 10 export the first comparison voltage can be higher than the second comparison voltage.
Comparison circuit 11, it is electrical connected with power supply U1, bleeder circuit 10, process circuit 12, its input receives partial pressure electricity
The first comparison voltage and the second comparison voltage that road 10 exports, and after being compared to the first comparison voltage and the second comparison voltage
Corresponding control signal is exported to process circuit 12.
Wherein, if the behaviour in service of load 15 is when load is installed, the first comparison voltage that bleeder circuit 10 exports
Less than the second comparison voltage, comparison circuit 11 exports corresponding control after being compared to the first comparison voltage and the second comparison voltage
Signal (such as loading the control signal installed) processed is to process circuit 12.Furthermore if the behaviour in service of load 15 is will be negative
When carrying removal, then the first comparison voltage that bleeder circuit 10 exports is higher than the second comparison voltage, and comparison circuit 11 compares first
Voltage and the second comparison voltage export corresponding control signal (such as loading the control signal removed) to place after being compared
Manage circuit 12.
Process circuit 12, it is electrical connected with power supply U1, comparison circuit 11, controller 13, for being exported in comparison circuit 11
Control signal for will load install control signal when or by load remove control signal when, generation control pulse letter
Number, and the control wave of generation is supplied to controller 13.This control wave can be high level pulse.So,
Installing the moment of load and removing the moment of load, process circuit 12 can export a high level pulse to controller
13, pulse width can be set as 100-200ms, this high level pulse can as the I/O mouths of interrupting input to controller 13,
So that controller 13 carries out the detection of related load resistance and control display screen is shown etc..And controller 13 is detected
It is to be completed in the delay capacitor C3 charging processes of process circuit 12.According to the detection process ability of controller 13, can set
The fully charged time of delay capacitor C3 resistance value, i.e. delay capacitor C3.Describe in detail as after.
Controller 13, it is electrical connected with process circuit 12, for the control wave control provided according to process circuit 12
The use information of the display screen display load of electronic cigarette processed, such as use information can include behaviour in service and resistance of load etc.
Parameter information.
Wherein, controller 13 can be MCU (Microcontroller Unit, micro-control unit).The present embodiment can be with
Controller 13 is waken up immediately when installing load, so that the control display screen of controller 13 is lighted and shows that resistance of load etc. is joined
The information such as number (design parameter can calculate measurement by MCU and obtain), " load has been installed "；When removing load, can also stand
Controller 13 is waken up, so that the control display screen of controller 13 is lighted and shows letters such as " load, which has been removed or loaded, not to be installed "
Breath, so as to reach the purpose for when load removes or accesses, generating a bright screen prompt message.
In summary, the load detecting circuit that the utility model embodiment provides, by with loading the sample circuit being connected
The behaviour in service of load is detected, bleeder circuit exports corresponding first respectively according to the behaviour in service of load by two output ends
Comparison voltage and the second comparison voltage are compared to comparison circuit, comparison circuit to the first comparison voltage and the second comparison voltage
After export corresponding control signal to process circuit, process circuit is in the control signal that comparison circuit exports to install load control
During signal processed or when removing load control signal, control wave is generated, and the control wave of generation is supplied to control
Device processed.So installing the moment of load and removing the moment of load, controller can receive pulse signal to carry out correlation
The detection and control display screen for loading resistance are shown etc..So as to accurately detect the behaviour in service of load, it is ensured that detection
The reliability of process, and this detection circuit structure is simple, and cost is relatively low.
Second embodiment
Fig. 2 is the circuit diagram for the load detecting circuit that the utility model second embodiment provides.Fig. 2 is refer to, wherein, figure
2 improve on the basis of Fig. 1.Fig. 2 and Fig. 1 difference is that Fig. 2 is Fig. 1 physical circuit figure.
Specifically, bleeder circuit 10 includes multiple sectional pressure elements, at least one sectional pressure element in multiple sectional pressure elements with
Power supply, sample circuit are connected with comparison circuit, one end ground connection of in the multiple sectional pressure element a sectional pressure element.
Further, multiple sectional pressure elements in bleeder circuit 10 include the first divider resistance R1, the second divider resistance
R2, the 3rd divider resistance R3, the 4th divider resistance R4, the 5th divider resistance R5.First divider resistance R1, the second divider resistance
R2, the 3rd divider resistance R3, the 4th divider resistance R4, the 5th divider resistance R5 play partial pressure effect.First divider resistance R1
One end be electrical connected with power supply U1, the first divider resistance R1 other end passes through the 3rd divider resistance R3 and the phase of comparison circuit 11
Even.Second divider resistance R2 one end is electrical connected with power supply U1, and the second divider resistance R2 other end passes through the 4th partial pressure electricity
Resistance R4 is connected with comparison circuit 11, is also grounded by the 5th divider resistance R5.
Sample circuit 9 includes partial pressure unit, sampling resistor R8 and filter capacitor C1 (the first filtered electricals for playing filter action
Hold).One end of partial pressure unit is connected with the first filter capacitor C1, and the other end of partial pressure unit is connected with sampling resistor R8；It is described
Sampling resistor R8 one end is connected with one end of the load 15, the other end ground connection of the sampling resistor R8；The load 15
The other end be connected with the partial pressure unit.
Further, partial pressure unit includes the 6th divider resistance R6, the 7th divider resistance R7.6th divider resistance R6's
One end is connected to the node between the first filter capacitor C1 and the first divider resistance R1, and the 6th divider resistance R6 other end passes through
7th divider resistance R7 is grounded.Sampling resistor R8 one end is connected with one end of load 15.The other end of load 15 and partial pressure list
6th divider resistance R6 of member is connected.
Wherein, power supply U1 can be to flow power supply always.If the behaviour in service of load 15 is non-installation load, bleeder circuit
First comparison voltage of 10 outputs is higher than the second comparison voltage, if the behaviour in service of load 15 is when load is installed, to divide
The first comparison voltage that volt circuit 10 exports is less than the second comparison voltage, if the behaviour in service of load 15 is when load is removed,
The first comparison voltage that then bleeder circuit 10 exports can be higher than the second comparison voltage again.In one embodiment of the invention,
One divider resistance R1, the second divider resistance R2, the 3rd divider resistance R3, the 4th divider resistance R4, the 5th divider resistance R5 resistance
Value can be respectively 2M ohms, 2M ohms, 100K ohms, 100K ohms, 51K ohms, and the 6th divider resistance R6, the 7th partial pressure are electric
Resistance R7, sampling resistor R8 resistance can be respectively 100K ohms, 51K ohms, 0.002 ohm, electric capacity C1 capacitance can be
100 μ F (microfarad).Comparison circuit 11, including comparator TMP, current-limiting resistance R9 (the first current-limiting resistance) and filter capacitor C2
(the second filter capacitor).Comparator TMP normal phase input end is connected (i.e. and partial pressure with the 3rd divider resistance R3 of bleeder circuit 9
One output end of circuit 10 is connected), the 4th divider resistance R4 of comparator TMP inverting input and bleeder circuit 10 (i.e. with
Another output end of bleeder circuit 10 is connected) it is connected.Comparator TMP voltage end In passes through current-limiting resistance R9 and power supply U1 phases
Even, also it is grounded by the second filter capacitor C2.Comparator TMP earth terminal ground connection, comparator TMP output end OUT and processing
Circuit 12 is connected.
Wherein, when non-installation load, the voltage of comparator TMP normal phase input end is higher than the voltage of inverting input,
At this moment comparator TMP output end OUT constant output high level.When load is installed, comparator TMP normal phase input end
Voltage be less than inverting input voltage, at this moment comparator TMP output end OUT low level is switched to by high level.When will be negative
When carrying removal, then the voltage of comparator TMP normal phase input end can be higher than the voltage of inverting input again, at this moment comparator TMP
Output end OUT high level is switched to by low level.Current-limiting resistance R9 plays metering function, to prevent from accessing comparator TMP electricity
Flow through big.Filter capacitor C2 is used for filtering clutter, there is provided stable voltage x current.Current-limiting resistance R9 resistance can be 100 Europe
Nurse.Filter capacitor C2 capacitance can be 1 μ F.
Process circuit 12, including it is divider resistance R10 (the 8th divider resistance), current-limiting resistance R11 (the second current-limiting resistance), steady
Piezoresistance R12, pull down resistor R13, delay capacitor C3, pulsed capacitance C4, transistor Q1, diode B1 (the first diode), two
Pole pipe B2 (the second diode), diode B3 (the 3rd diode).Transistor Q1 base stage passes through the 8th divider resistance R10 and electricity
Source U1 is connected, and is also connected by delay capacitor C3 with the comparator TMP of comparison circuit 11 output end OUT, transistor Q1 hair
Emitter-base bandgap grading is connected by the second current-limiting resistance R11 with power supply U1, and transistor Q1 colelctor electrode is grounded by pull down resistor R13.Pulse
Electric capacity C4 one end is connected with the comparator TMP of comparison circuit 11 output end OUT, and the pulsed capacitance C4 other end passes through voltage stabilizing
Resistance R12 is grounded, and is also attached to diode B1 negative electrode.Diode B1 plus earth.Diode B2 anode and diode
B1 negative electrode is connected, and diode B3 anode is connected with transistor Q1 colelctor electrode, diode B2 and diode B3 negative electrode with
Controller 13 is connected.
Wherein, above-mentioned transistor Q1 is triode, and in other embodiments, above-mentioned transistor Q1 can also be that field-effect is brilliant
The switch elements such as body pipe.Delay capacitor C3 capacitance can be the numerical value such as 3.3 μ F, and pulsed capacitance C4 capacitance can be 1 μ F etc.
Numerical value.After there is delay capacitor C3 time-lag action, delay capacitor C3 to be full of, the pulse of B points disappears.When pulsed capacitance C4 charges,
Instantaneously it is changed into high level on the right of pulsed capacitance C4, is subsequently changed to low level, gives B points one pulse signal.R12 and B1 makees for voltage stabilizing
With preventing overtension.Wherein, when non-installation load, the voltage of comparator TMP normal phase input end is higher than inverting input
Voltage, at this moment comparator TMP output end OUT constant output high level, now, transistor Q1 cut-off so that processing
The output end B of circuit 12 keeps high-impedance state, i.e. the not output pulse signal of process circuit 12.When load is installed, compare
The voltage of device TMP normal phase input end is less than the voltage of inverting input, and at this moment comparator TMP output end OUT is by high level
Switch to low level, now, delay capacitor C3 is electrically charged, when delay capacitor C3 is started to charge up, transistor Q1 conductings, so that
Diode B3 is turned on, and diode B3 negative electrode (i.e. the output end B of process circuit 12) exports high level pulse to controller 13, high
Level pulse persistently exports, until when delay capacitor C3 is fully charged, controller 13 can during this period of time detect heating wire
Relevant parameter.In delay capacitor C3 charging completes, then transistor Q1 ends, the output end B of process circuit 12 high level arteries and veins
Punching disappears, and continues to keep high-impedance state.When load is removed, then the voltage of comparator TMP normal phase input end can be higher than again
The voltage of inverting input, at this moment comparator TMP output end OUT high level is switched to by low level, now, pulsed capacitance C4 quilts
Charging, so that diode B2 is turned on, diode B2 negative electrode (i.e. the output end B of process circuit 12) output high level pulse
To controller 13.Current-limiting resistance R11 is used for current limliting, can be stable in certain limit by electric current when the electric current for flowing through it is excessive.
Divider resistance R10 can ensure that transistor Q1 base stage is provided forward voltage.Pull down resistor R13 may insure transistor Q1's
Colelctor electrode is in low level.Voltage regulation resistance R12 and diode B1 have pressure stabilization function, prevent overtension.Diode B2 and B3
With isolation prime and rear class, the effect of electric current backflow is prevented.Divider resistance R10 (the 8th divider resistance), current-limiting resistance R11
(the second current-limiting resistance), voltage regulation resistance R12, pull down resistor R13 resistance can be 100K ohms, 1 ohm, 100K Europe respectively
Nurse, 1M ohms.
The following detailed description of the course of work of load detecting circuit：
First, when being fitted without load, bleeder circuit 10 exports to be higher than to the voltage of comparator TMP normal phase input end
The voltage to inverting input is exported, at this moment comparator TMP output end OUT constant output high level.In process circuit 12
Transistor Q1 base stage is in by state for high level, so that the output end B of process circuit 12 keeps high-impedance state.
When load is installed, bleeder circuit 10 exports the voltage to comparator TMP normal phase input end less than output
To the voltage of inverting input, at this moment comparator TMP output end OUT switchs to low level by high level, now, delay capacitor C3
It can be charged by transistor Q1 base stage, at this moment transistor Q1 is turned on, so that diode B3 is turned on, diode B3's
Negative electrode (i.e. the output end B of process circuit 12) exports high level pulse to controller 13, and high level pulse persistently exports, until
When delay capacitor C3 is fully charged, controller 13 can during this period of time detect the relevant parameter of heating wire.Filled in delay capacitor C3
Electricity is completed, then transistor Q1 ends, and the output end B of process circuit 12 high level pulse disappears, and continues to keep high-impedance state, i.e.,
The output end B of process circuit 12 does not have pulse output.
When will load remove when, bleeder circuit 10 export can be higher than again to the voltage of comparator TMP normal phase input end it is defeated
Go out the voltage to inverting input, at this moment comparator TMP output end OUT switchs to high level, now, pulsed capacitance by low level
C4 is electrically charged, so that diode B2 is turned on, diode B2 negative electrode (i.e. the output end B of process circuit 12) output high level
Pulse is to controller 13.
So, installing the moment of load and removing the moment of load, the output end B of process circuit 12 can occur one
Individual high level pulse, this high level pulse can be as the I/O mouths of interrupting input to controller 13, so that controller 13 carries out phase
The detection of the load resistance of pass and control display screen show etc., for example, display " load has been installed ", " load removed or
Load does not install ", the information such as resistance of load.And this detection circuit passes through actual test, and actual power loss is only in several uA
Within, power consumption is relatively low, and detection circuit structure is simple, cost is relatively low.
According to above example, the utility model embodiment also discloses a kind of Weight detector, including above-mentioned implementation
Load detecting circuit in example.
In summary, the load detecting circuit and its Weight detector that the utility model embodiment provides, by with bearing
The behaviour in service of connected sample circuit detection load is carried, bleeder circuit passes through two output ends point according to the behaviour in service of load
Corresponding first comparison voltage and the second comparison voltage are not exported to comparison circuit, and comparison circuit is to the first comparison voltage and second
Comparison voltage exports the control letter that corresponding control signal exports to process circuit, process circuit in comparison circuit after being compared
Number when installing load control signal or when removing load control signal, to generate control wave, and by the control of generation
Pulse signal is supplied to controller.So installing the moment of load and removing the moment of load, controller can receive arteries and veins
Rush signal and shown etc. with carrying out the detection of related load resistance and control display screen.So as to accurately detect making for load
With situation, it is ensured that the reliability of detection process, and this detection circuit structure is simple, and cost is relatively low.
It is described above, only it is preferred embodiment of the present utility model, not the utility model is made any formal
Limitation, although the utility model is disclosed above with preferred embodiment, but be not limited to the utility model, it is any ripe
Professional and technical personnel is known, is not being departed from the range of technical solutions of the utility model, when in the technology using the disclosure above
Hold the equivalent embodiment made a little change or be modified to equivalent variations, as long as being without departing from technical solutions of the utility model
Hold, any simple modification, equivalent change and modification made according to the technical essence of the utility model to above example, still
Belong in the range of technical solutions of the utility model.
Claims (8)
1. a kind of load detecting circuit, it is characterised in that it includes：With loading the sample circuit being connected；With power supply and described adopting
The connected bleeder circuit of sample circuit, the comparison circuit being connected with the output end of the bleeder circuit and the power supply, with the electricity
The process circuit that source is connected with the output end of the comparison circuit, and the control being connected with the output end of the process circuit
Device.
2. load detecting circuit according to claim 1, it is characterised in that the bleeder circuit includes multiple partial pressures member
Part, at least one sectional pressure element and the power supply, the sample circuit and the comparison circuit in the multiple sectional pressure element
It is connected, one end ground connection of a sectional pressure element in the multiple sectional pressure element.
3. load detecting circuit according to claim 1, it is characterised in that the sample circuit includes partial pressure unit, adopted
Sample resistance and the first filter capacitor, one end of the partial pressure unit are connected with the first filter capacitor, the partial pressure unit it is another
End is connected with the sampling resistor；One end of the sampling resistor is connected with one end of the load, the sampling resistor it is another
One end is grounded；The other end of the load is connected with the partial pressure unit.
4. load detecting circuit according to claim 1, it is characterised in that the comparison circuit includes comparator, first
Current-limiting resistance and the second filter capacitor；The normal phase input end of the comparator is connected with an output end of the bleeder circuit, institute
State the inverting input of comparator with another output end of the bleeder circuit to be connected, the voltage end of the comparator passes through described
First current-limiting resistance is connected with power supply, is also grounded by second filter capacitor, the earth terminal ground connection of the comparator, described
The output end of comparator is connected with the process circuit.
5. load detecting circuit according to claim 1, it is characterised in that the process circuit includes divider resistance, the
Two current-limiting resistances, voltage regulation resistance, pull down resistor, delay capacitor, pulsed capacitance, transistor, the first diode, the second diode,
3rd diode；The first end of the transistor is connected by the divider resistance with the power supply, also passes through the delay electricity
Appearance is connected with the output end of the comparison circuit, and the second end of the transistor passes through second current-limiting resistance and the power supply
It is connected, the 3rd end of the transistor is grounded by the pull down resistor；One end of the pulsed capacitance and the comparison circuit
Output end be connected, the other end of the pulsed capacitance is grounded by the voltage regulation resistance, is also attached to first diode
Negative electrode；The plus earth of first diode；The negative electrode phase of the anode of second diode and first diode
Even, the anode of the 3rd diode is connected with the 3rd end of the transistor, second diode and the three or two pole
The negative electrode of pipe is connected with the controller.
6. load detecting circuit according to claim 5, it is characterised in that the transistor is triode, described first
End, the second end and the 3rd end are respectively the base stage of the transistor, emitter and collector.
7. load detecting circuit according to claim 1, it is characterised in that the controller is MCU.
8. a kind of Weight detector, it is characterised in that it includes：Such as the load detecting any one of claim 1-7
Circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720453257.1U CN206848381U (en) | 2017-04-26 | 2017-04-26 | Load detecting circuit and its Weight detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720453257.1U CN206848381U (en) | 2017-04-26 | 2017-04-26 | Load detecting circuit and its Weight detector |
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| Publication Number | Publication Date |
|---|---|
| CN206848381U true CN206848381U (en) | 2018-01-05 |
Family
ID=60794238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720453257.1U Active CN206848381U (en) | 2017-04-26 | 2017-04-26 | Load detecting circuit and its Weight detector |
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| Country | Link |
|---|---|
| CN (1) | CN206848381U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110034535A (en) * | 2019-03-29 | 2019-07-19 | 惠州汇能精电科技有限公司 | Discharge equipment and its remained capacity circuit |
-
2017
- 2017-04-26 CN CN201720453257.1U patent/CN206848381U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110034535A (en) * | 2019-03-29 | 2019-07-19 | 惠州汇能精电科技有限公司 | Discharge equipment and its remained capacity circuit |
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