CN208140755U - A kind of electronic load device - Google Patents
A kind of electronic load device Download PDFInfo
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- CN208140755U CN208140755U CN201721753901.3U CN201721753901U CN208140755U CN 208140755 U CN208140755 U CN 208140755U CN 201721753901 U CN201721753901 U CN 201721753901U CN 208140755 U CN208140755 U CN 208140755U
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Abstract
The utility model patent discloses a kind of electronic load device：Input equipment, display, microcontroller, detection circuit, computing circuit, power module and power supply；Input equipment, display, detection circuit and computing circuit are connect with microcontroller respectively, detection circuit and power module are connect with computing circuit respectively, the display, microcontroller and computing circuit connect to power supply respectively, detection circuit and power module respectively with drive connection to be measured；Detection circuit obtains the first value of electrical signals of driving to be measured, and is transmitted to computing circuit；The reference electrical signal that computing circuit is transmitted according to microcontroller is adjusted first value of electrical signals；Detection circuit obtains the second value of electrical signals of driving to be measured again, and is transmitted to microcontroller；Second value of electrical signals is sent to display and shown by microcontroller.The electronic load device of the utility model, structure is simple, flexible operation, can adapt to a variety of driving testing requirements；Testing efficiency and accuracy are higher.
Description
Technical field
The utility model patent is related to the technical field of driving test, especially a kind of electronic load device.
Background technique
It is existing in the driving test process to such as LED light etc., generally require the LED light for welding plurality of specifications in advance
Source plate just adapts to the LED light of different capacity.During the test, if driving is bad also there is a situation where burning lamp bead, no
Security risk is only caused, moreover, waste of manpower financial resource.
The current electronic load for being used for Test driver existing on the market, is mostly matrix press-key, interface is tedious, is arranged numerous
It is trivial, and lack defencive function, it is easily damaged.
In conclusion structure is complicated for existing electronic load, and it is cumbersome, it has a single function；Moreover, the method for Test driver
Also complex, testing efficiency is lower.
Utility model content
For the problems of the prior art, the purpose of this utility model is to provide for a kind of electronic load device.
In order to achieve the above object, the technical solution of the utility model is：
A kind of electronic load device, including：Input equipment, display, microcontroller, detection circuit, computing circuit, power
Module and power supply；
The input equipment, display, detection circuit and computing circuit are connect with microcontroller respectively, the detection circuit
It is connect respectively with computing circuit with power module, the display, microcontroller and computing circuit connect to power supply respectively, described
Detection circuit and power module respectively with drive connection to be measured；
The detection circuit obtains the first value of electrical signals of driving to be measured, and first value of electrical signals is transmitted to operation
Circuit；
The reference electrical signal that the computing circuit is transmitted according to microcontroller is adjusted first value of electrical signals；Its
In, the reference electrical signal is the preset value that microcontroller is obtained by the input equipment；
The detection circuit obtains the second value of electrical signals of driving to be measured again, and second value of electrical signals is transmitted to
Microcontroller；
Second value of electrical signals is sent to display after internal AD conversion processing by the microcontroller, and is passed through
Display is shown.
Further, electronic load device described in the utility model further includes：D/A conversion circuit and buffer；
The D/A conversion circuit and buffer are connected in series between microcontroller and computing circuit；
The D/A conversion circuit and buffer successively carry out at digital-to-analogue conversion processing and buffering the reference electrical signal
Reason.
Further, electronic load device described in the utility model, the detection circuit include voltage detecting circuit and
Current detection circuit, the computing circuit include constant voltage circuit and constant-current circuit；
The voltage detecting circuit is connect with constant voltage circuit, and the current detection circuit is connect with constant-current circuit, the electricity
Pressure detection circuit and current detection circuit are connect with microcontroller respectively, the constant voltage circuit and constant-current circuit respectively with buffer
Connection；
The voltage detecting circuit obtains the first voltage signal value of driving to be measured, and the first voltage signal value is passed
Transport to constant voltage circuit, the reference voltage signal that the constant voltage circuit is transmitted according to microcontroller to the first voltage signal value into
Row adjustment；Wherein, the reference voltage signal is the preset voltage value that microcontroller is obtained by the input equipment；
The current detection circuit obtains the first current signal value of driving to be measured, and first current signal value is passed
Transport to constant-current circuit, the reference current signal that the constant-current circuit is transmitted according to microcontroller to first current signal value into
Row adjustment；Wherein, the reference current signal is the pre-set current value that microcontroller is obtained by the input equipment；
The voltage detecting circuit obtains the second voltage signal value of driving to be measured again, and by the second voltage signal
Value is transmitted to microcontroller, and the second voltage signal value is sent to by the microcontroller after internal AD conversion and processing
Display, and shown by display；
The current detection circuit obtains the second current signal value of driving to be measured again, and by second current signal
Value is transmitted to microcontroller, and second current signal value is sent to by the microcontroller after internal AD conversion and processing
Display, and shown by display.
Further, electronic load device described in the utility model further includes：Relay circuit；
The relay circuit includes the first relay driving end, the second relay driving end and third relay driving
End, the first relay contact switch 1 and the first relay contact switch 2 being connect with the first relay driving end, with second after
Second relay contact switch of electrical equipment drive end connection, and the third relay contact connecting with third relay driving end are opened
It closes；
First relay driving end, the second relay driving end and third relay driving end respectively with microcontroller
Connection, microcontroller control the first relay contacts switch 1 and the first relay contacts switch 2 by the first relay driving end
Actuation and disconnection, by the second relay driving end control the second relay contacts switch actuation and disconnection, pass through third
Relay driving end controls the actuation and disconnection of third relay contacts switch；
First relay contact switch 1 controls the connection of driving and power module to be measured, the second relay touching
The switching of the electric current gear of point switch control constant flow module, the third relay contact switch control power module and constant pressure mould
The connection of block or constant flow module.
Further, electronic load device described in the utility model further includes：Connect with the first relay contacts switch 2
The status indicator lamp connect.
Further, electronic load device described in the utility model is realized by control the first relay contacts switch
Defencive function；
The defencive function includes reverse connecting protection, overvoltage protection, overcurrent protection, overpower protection.
Further, electronic load device described in the utility model, the input equipment include touch key-press and rotation
Code switch；
The touch key-press and rotary coding switch are connect with microcontroller respectively；
For the touch key-press for operational mode and input protection value to be arranged, the rotary coding switch is described for adjusting
The size of preset value.
Further, electronic load device described in the utility model, the power supply are Switching Power Supply；
Further, electronic load device described in the utility model, the buffer include the amplification of reverse phase scale operation
Device.
Further, electronic load device described in the utility model, the constant voltage circuit include comparator/operational amplifier
Positive-feedback circuit, the constant-current circuit include comparator/operational amplifier negative-feedback circuit.
Further, electronic load device described in the utility model, the display are LCD display.
Compared with prior art, the structure of electronic load device provided by the utility model is simple, flexible operation, Neng Goushi
Answer a variety of different driving testing requirements；Furthermore the electronic load device of the utility model can directly display test result, just
In processing abnormal conditions in time；The electronic load device of the utility model, inside sets defencive function, is effectively guaranteed driving to be measured
And the safety of the electronic load device of the utility model；Finally, the Electronic Negative that the utility model of the utility model provides carries
The testing efficiency and accuracy set are higher.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Attached drawing 1 is the structural schematic diagram of the electronic load device of one of embodiment of the utility model；
Attached drawing 2 is the structural schematic diagram of the electronic load device of one of embodiment of the utility model；
Attached drawing 3 is the structural schematic diagram of the electronic load device of one of embodiment of the utility model；
Attached drawing 4 is the structural schematic diagram of the electronic load device of one of embodiment of the utility model；
Attached drawing 5 is the interface schematic diagram of the electronic load device of one of embodiment of the utility model.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe.Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
As shown in Fig. 1, attached drawing 1 is the structural representation of the electronic load device of one of embodiment of the utility model
Figure, including：Input equipment 100, display 200, microcontroller 300, detection circuit 400, computing circuit 500, power module 600
With power supply 700；
The input equipment 100, display 200, detection circuit 400 and computing circuit 500 connect with microcontroller 300 respectively
It connects, the detection circuit 400 and power module 600 are connect with computing circuit 500 respectively, the display 200, microcontroller
300 and computing circuit 500 connect respectively with power supply 700, the detection circuit 400 and power module 600 respectively with driving to be measured
800 connections；
The detection circuit 400 obtains the first value of electrical signals of driving 800 to be measured, and first value of electrical signals is transmitted
To computing circuit 500；
The computing circuit 500 carries out first value of electrical signals according to the reference electrical signal that microcontroller 300 transmits
Adjustment；Wherein, the reference electrical signal is the preset value that microcontroller 300 passes through that the input equipment 100 obtains；
The detection circuit 400 obtains the second value of electrical signals of driving 800 to be measured again, and by second value of electrical signals
It is transmitted to microcontroller 300；
Second value of electrical signals is sent to display 200 by the microcontroller 300, and is carried out by display 200
Display.
Compared with prior art, the structure of electronic load device provided by the utility model is simple, flexible operation, Neng Goushi
Answer a variety of different driving testing requirements；Furthermore the electronic load device of the utility model can directly display test result, just
In processing abnormal conditions in time；Electronic load device provided by the utility model effectively improves the work effect of driving test
Rate and accuracy rate.
As shown in Fig. 2, attached drawing 2 is the structural representation of the electronic load device of one of embodiment of the utility model
Figure, in the present embodiment, electronic load device described in the utility model can also include：D/A conversion circuit 900 and buffering
Device 1000；
The D/A conversion circuit 900 and buffer 1000 are connected in series between microcontroller 300 and computing module 500；
The D/A conversion circuit and buffer 1000 carry out digital-to-analogue conversion processing and buffering to the reference electrical signal respectively
Processing.
Through the above technical solutions, the electronic load device of the utility model, by being counted to the reference electrical signal
Mould conversion process and buffered enable and are used to by the reference electrical signal that input equipment 100 inputs by computing circuit 500
The first electric signal detected is adjusted.In practical applications, if driving to be measured is constant pressure operating mode, the first electric signal
It is exactly voltage signal, corresponding reference electrical signal is also voltage signal；Correspondingly, if driving to be measured is constant current mode, the
One electric signal is exactly current signal, and corresponding reference electrical signal is also current signal.
As shown in Fig. 3, attached drawing 3 is the structural representation of the electronic load device of one of embodiment of the utility model
Figure, in the present embodiment, the electronic load device of the utility model, the detection circuit 400 includes 401 He of voltage detecting circuit
Current detection circuit 402, the computing circuit 500 include constant voltage circuit 501 and constant-current circuit 502；
The voltage detecting circuit 401 is connect with constant voltage circuit 501, the current detection circuit 402 and constant-current circuit 502
Connection, the voltage detecting circuit 401 and current detection circuit 402 are connect with microcontroller 300 respectively, the constant voltage circuit
501 and constant-current circuit 502 connect respectively with buffer 1000；
The voltage detecting circuit 401 obtains the first voltage signal value of driving 800 to be measured, and the first voltage is believed
Number value is transmitted to constant voltage circuit 501, and the reference voltage signal that the constant voltage circuit 501 is transmitted according to microcontroller 300 is to described
First voltage signal value is adjusted；Wherein, the reference voltage signal is that microcontroller 300 passes through the input equipment 100
The preset voltage value of acquisition；
The current detection circuit 402 obtains the first current signal value of driving 800 to be measured, and first electric current is believed
Number value is transmitted to constant-current circuit 502, and the reference current signal that the constant-current circuit 502 is transmitted according to microcontroller 300 is to described
First current signal value is adjusted；Wherein, the reference current signal is that microcontroller 300 passes through the input equipment 100
The pre-set current value of acquisition；
The voltage detecting circuit 401 obtains the second voltage signal value of driving 800 to be measured again, and electric by described second
Pressure signal value is transmitted to microcontroller 300, and the second voltage signal value is sent to display 200 by the microcontroller 300,
And it is shown by display 200；
The current detection circuit 402 obtains the second current signal value of driving 800 to be measured again, and electric by described second
Stream signal value is transmitted to microcontroller 300, and second current signal value is sent to display 200 by the microcontroller 300,
And it is shown by display 200.
In practical applications, voltage detecting circuit 401, constant voltage circuit 501 and current detection circuit 402, constant-current circuit 502
It does not work at the same time, because under normal circumstances, driving 800 to be measured or is constant pressure operating mode or is constant current mode, institute
It works in such a way that voltage detecting circuit 401, constant voltage circuit 501 and current detection circuit 402, constant-current circuit 502 select one,
In real work, constant voltage/constant current operating mode is converted by the switch contact of relay.
The electronic load device of the utility model in one of the embodiments, can also include：Relay circuit
1100；
The relay circuit 1100 includes the first relay driving end 11011, the second relay driving end 11021 and the
Three relay driving ends 11031, the first relay contact switch 1 (11012) being connect with the first relay driving end 11011 and
First relay contact switch 2 (11013), the second relay contact switch being connect with the second relay driving end 11021
11022, and the third relay contact switch 11032 being connect with third relay driving end 11031；
First relay driving end 11011, the second relay driving end 11021 and third relay driving end
11031 connect with microcontroller 300 respectively, and microcontroller 300 controls the first relay by the first relay driving end 11011
The actuation and disconnection of electric shock switch 1 (11012) and the first relay contacts switch 2 (11013) pass through the second relay driving end
The actuation and disconnection of 11021 the second relay contacts switches 11022 of control, control the by third relay driving end 11031
The actuation and disconnection of three relay contacts switches 11032；
The connection of first relay switch contacts 1 (11012) the control driving 800 and power module 600 to be measured, it is described
Second relay contact switch 11022 controls the electric current gear of constant flow module 502, the third relay switch contacts 11032
Control the connection of microcontroller 300 and constant pressure module 501 or constant flow module 502.
In the above-described embodiments, relay circuit 1100 include 3 relays, the first relay driving end 11011 with it is micro-
Controller 300 connects, and microcontroller 300 controls the contact switch 1 of the first relay by the first relay driving end 11011,
And then the connection of tested driving 800 and power module 600 is controlled, when microcontroller 300 detects abnormality such as over-voltage, mistake
It disconnects when stream, reversal connection and overpower into guard mode.Microcontroller 300 passes through third relay contact switch
11032 control operating mode selections, by the actuation and disconnection switch operating of the tip side 11032 of third relay in constant pressure
(CV) or constant current (CC) mode, while the first relay contact switch 2 (11013) controls corresponding status indicator lamp 1300
It lights.In constant current mode, microcontroller 300 controls 502 current gear of constant flow module by the second relay contact switch 11022
The selection of position.
The electronic load device of the utility model in one of the embodiments, the buffer 1000 include reverse phase ratio
Example operational amplifier.
The electronic load device of the utility model in one of the embodiments, the constant voltage circuit 501 include comparing fortune
Amplifier positive-feedback circuit is calculated, the constant-current circuit 502 includes comparator/operational amplifier negative-feedback circuit.
In the above-described embodiments, the buffer 1000 of the electronic load device of the utility model is amplified by reverse phase scale operation
Device circuit is constituted, when microcontroller 300 controls constant voltage mode, voltage value that needs are arranged according to constant voltage mode operation ratio
Example, sends corresponding numerical value to D/A conversion circuit 900, becomes analog quantity through D/A conversion circuit 900 and give by operation amplifier
The buffer 1000 that device is constituted, buffer 1000 are played slow due to high input impedance, low output impedance as voltage follower
Punching effect.When microcontroller 300 controls constant current mode, buffer is defeated under the action of the second relay contacts switch 11022
Ratio can be switched out, ratio becomes 2 times when actuation, realizes the switching of electric current 0-5A and 5-10A gear.
When the electronic load device of the utility model works in voltage mode, i.e., voltage detecting circuit 401 and constant pressure are electric
When road 501 works, the constant pressure value of setting is output to the non-inverting input terminal of comparator/operational amplifier as reference by buffer 1000
Voltage.Voltage detecting circuit 401 is made of voltage dividing resistance circuit, is connected in parallel on 600 both ends of power module.It is adopted from power module 600
Sample to voltage value feed back to non-inverting input terminal and setting value be compared and enlarged all the way, the conduction amount of regulation power module 600,
To control constant pressure value.The voltage value that another way samples is by double diode BAT54 voltage clamping at high or low level, micro-control
Device 300 processed judges whether reversal connection or overvoltage protection according to level value.
When the electronic load device of the utility model works in current-mode, i.e. current detection circuit 402 and Constant Electric Current
When road 502 works, the constant current value of setting is output to the inverting input terminal of comparator/operational amplifier as reference by buffer 1000
Voltage, current detection circuit 402 are made of series connection sample resistance circuit, the electricity sampled from the series connection of power module 600 sampling end
Pressure value is fed back all the way to be compared and enlarged to inverting input terminal and setting value, the conduction amount of regulation power module, to control perseverance
Flow valuve.The current value that another way samples is transported to microcontroller 300, converts through the A/D inside microcontroller 300, and judgement is
No overcurrent protection.In addition microcontroller 300 judges whether that power is protected according to the voltage and current value calculated power value tested.
The power module 600 of the electronic load device of the utility model is by IGBT and sampling in one of the embodiments,
Resistance composition, 501/ constant-current circuit 502 of constant voltage circuit sample the conduction amount for forming IGBT in feedback control power module 600, make
Its work is in linear zone, in constant voltage mode, if the voltage value being sampled to is greater than the setting value of microcontroller 300, with mutually defeated
The positive feedback effect for entering end increases the output quantity of comparator/operational amplifier, and IGBT conduction amount increases with it, and internal resistance reduces, electricity
The decline of pressure value, vice versa.In constant current mode, if the current value being sampled to is greater than the setting value of microcontroller 300, reverse phase
The negative feedback of input terminal reduces the output quantity of comparator/operational amplifier, and IGBT conduction amount reduces therewith, and internal resistance increases,
Current value reduces, and vice versa.By the above method, the purpose of constant pressure or constant current is realized.
In practical applications, display 200 can use LCD2002, and every row can show 20 characters, and it is aobvious to be divided into two rows
Show, be directly connected with the port I/O of microcontroller 300, for showing pre-set reference electrical signal numerical value and real-time detection
Voltage, electric current, the power, runing time, display locking unlock arrived, it is timely when there are abnormal conditions or over-voltage over-current protection
Remind etc..
The electronic load device of the utility model in one of the embodiments, the input equipment 100 include touching to press
Key 101 and rotary coding switch 102；
The touch key-press 101 and rotary coding switch 102 are connect with microcontroller 300 respectively；
The touch key-press 101 is for being arranged operational mode and input protection value, and the rotary coding switch 102 is for adjusting
The size of the whole preset value.
In practical applications, inside the touch key-press 101 in the electronic load device of the utility model and microcontroller 300
A/D conversion port connection, in actual operation, using voltage change caused by human body sensing by A/D convert for microcontroller
Device 300 judges the state of key, and makes corresponding processing, and wherein CC/CV key is for being arranged operational mode；FUNTION key is used
It is arranged in protection value, runing time is checked and removed；ENTER key is used to restore under unlock and failsafe state under lock state
Deng.
In practical applications, the rotary coding switch 102 in the electronic load device of the utility model and microcontroller 300
The connection of P3 mouth, and be connected to the interruptive port of microcontroller 300, failing edge triggering, in setting shape by double diode BAT54
Under state, when left-handed or dextrorotation, the failing edge of generation, which triggers, to be interrupted, and microcontroller 300 is analyzed left-handed according to the value of pin A, B
Or dextrorotation.When dextrorotation, the numerical value of setting increases, and the numerical value being arranged when left-handed reduces, and can also rotate and choose whether to remove fortune
The row time.
The electronic load device of the utility model in one of the embodiments, can also be realized by the first relay
Defencive function；
The defencive function includes reverse connecting protection, overvoltage protection, overcurrent protection, overpower protection.
The electronic load device of the utility model in one of the embodiments, can also include：First relay switch
The status indicator lamp 1300 that contact 2 connects.
The electronic load device of the utility model in one of the embodiments, the power supply 700 are Switching Power Supply.Such as
Shown in attached drawing 4, attached drawing 4 is the structural schematic diagram of the electronic load device of one of embodiment of the utility model, power supply 700
Respectively display 200, microcontroller 300, computing circuit 500 and relay circuit 1100 are powered, specific supply voltage according to
Depending on actual conditions, in the present embodiment, power supply 700 is that display 200, microcontroller 300 and relay circuit 1100 provide
The voltage support of ± 5V, power supply 700 are that computing circuit 500 provides the voltage support of ± 15V.
Compared with prior art, the structure of electronic load device provided by the utility model is simple, flexible operation, Neng Goushi
Answer a variety of different driving testing requirements；Furthermore the electronic load device of the utility model can directly display test result, just
In processing abnormal conditions in time；The electronic load device of the utility model inside sets protection circuit, is effectively guaranteed driving to be measured
And the safety of the electronic load device of the utility model；Finally, the Electronic Negative that the utility model of the utility model provides carries
The testing efficiency and accuracy set are higher.
As shown in Fig. 5, attached drawing 5 is the interface signal of the electronic load device of one of embodiment of the utility model
Figure, specifically the front panel schematic diagram of electronic load device, device marked in the figure are followed successively by：1. power switch；2.LCD is shown
Device；3. constant voltage mode indicator light；4. constant current mode indicator light；5. power supply indicator；6. rotary coding switch；7.CC/CV key；
8.FUNCTION key；9.ENTER key；10. input positive terminal+；11. inputting negative terminal-.
The specific works parameter of electronic load device in above-described embodiment is as follows：
One, constant pressure load (being directed to LED constant-voltage characteristic)：
Voltage range：0~100V；Precision is set：0.1V/SET；
Overcurrent protection：0~5A；Precision is set：0.01A/SET.
Two, Constant Current Load：
Current range：0~5A；Precision is set：0.001A/SET；
Current range：5.01~10A；Precision is set：0.01A/SET；
When less than 1A：Overvoltage protection, 100V；
When greater than 1A：Overvoltage protection, 50V；
Power protection：Power bracket：1~300W；Precision is set：1W/SET.
It, can be as explained below when electronic load device described in specifically used above-described embodiment：
1, it is switched on：
POWER key is turned on the power switch, POWER indicator light can light at this time, and LCD screen is shown：" Wake Up " prompt etc.
To which system is initializing and loading data, is not responding to any input.Being initially opened load is factory-set value i.e. constant pressure value CV
=1.0V, constant current value CC=5mA, power protection value P_L=1W defaults constant voltage mode, and after about 3 seconds, initialization is completed in load,
The first row is shown：
"U:I:", the second row shows " CV:1.0V P:".CV indicator light is bright.Booting later, on mode and setting value be
Primary value.
2, LED constant current driving test：
The positive and negative anodes of the output positive and negative anodes of LED driving and the input terminal of load are correspondingly connected with first, press CC/CV
Key is switched to constant voltage mode, and CV indicator light lights, and the second line cursor flashing, rotary coding switch inputs CV value, then presses
FUNTION key, LCD the first row show " Power Limit:", the second row is shown " I Limit:", rotary coding switch input work
Rate protection value current protection value.FUNTION is pressed again, and the first row shows " Runtime:", the second row shows " Clear
Runtime:Y？".It asks whether to understand runing time, if you do not need to removing, rotary coding switch, Y->N.Then it sets
CV value, power protection value after current protection value, press ENTER key, start to test, and into real-time display state, test on LCD
It can show real-time voltage U, electric current I and power P.
3, constant voltage source is tested：
The positive and negative anodes of the output positive and negative anodes of constant pressure source to be measured and the input terminal of load are correspondingly connected with first, are pressed
CC/CV key is switched to constant current mode, and CC indicator light lights, and the flashing of the second line cursor, rotary coding switch, input CC value is then
FUNTION key is pressed, LCD the first row shows " Power Limit:", when CC value is less than 1A, the second row is shown " V Limit:
100V".When CC value is greater than 1A, the second row is shown " V Limit:50V".Rotary coding switch input power protection value.Again
FUNTION is pressed, the first row shows " Runtime:", the second row is shown " Clear Runtime:Y？".It asks whether to understand fortune
The row time, if you do not need to removing, rotary coding switch, Y->N.CC value is set, power protection value is pressed ENTER key, opened
Begin to test, into real-time display state, real-time voltage U, electric current I and power P can be shown by testing on LCD.
4, runing time is checked：
During test carries out, if clicking FUNTION key, LCD will show time of operation and for 3 seconds, then automatically
Back to real-time display state of value.
5, press key locking and unlock：
When testing time is less than 30S.If clicking CC/CV key, interrupt test is again introduced into corresponding 2nd or the 3rd
In setting operation.When testing time is greater than 30S, CC/CV key is locked, and " Locked will be shown by clicking CC/CV key LCD！",
" Press'enter'1s " prompts to unlock after persistently pressing ENTER key 1 second.LCD is shown after unlock " Lock is
open！",
" You can set " prompts key to unlock, can be configured.If clicking CC/CV key, interrupt test, then
It is secondary into corresponding 2nd or the 3rd setting operation in.
6, abnormal condition protection.
In the case where LED constant current drives test mode, if detecting the I Limit value for the setting that electric current is greater than, it will interrupt
Test, first the second row of LCD the first row show " Warning respectively:" and " Current Protect！", then LCD the first row
Second row shows " continue respectively？" and " Click'Enter' ", loopy moving is shown.If prompt continues to test, please point
Hit ENTER key.After click, circulation display is jumped out, into the 2nd operation.
Under constant voltage source test mode, if detecting that voltage is greater than corresponding V Limit value, it will interrupt test,
The second row of LCD the first row first shows " Warning respectively:" and " Voltage Protect！", then the second row of LCD the first row
" continue is shown respectively？" and " Click'Enter' ", loopy moving is shown.If prompt continues to test, ENTER please be click
Key.After click, circulation display is jumped out, into the 3rd operation.
Under any driving power test of both the above, if performance number is the product of the voltage value and current value tested
More than preset performance number Power Limit, it will interrupt test, first the second row of LCD the first row are shown respectively
"Warning:" and " Power Protect！", then the second row of LCD the first row shows " continue respectively？" and " Click'
Enter' ", loopy moving is shown, if prompt continues to test, please click ENTER key.After click, circulation display is jumped out, is entered
Corresponding 2nd or the 3rd operation.
Under any driving power test of both the above, if the voltage value tested is less than built-in definition value, judge to connect
Wrong misses and (is reversely connected comprising positive and negative anodes).Will interrupt test, the second row of LCD the first row first shows " Warning respectively:" and "
Connect Error！", then the second row of LCD the first row shows " continue respectively？" and " Click'Enter' ", circulation shifting
Dynamic display please click ENTER key if prompt continues to test.After click, circulation display is jumped out, into corresponding 2nd or the
3 operations.
In practical applications, the electronic load device that can use one of embodiment of the utility model is driven
Test, includes the following steps：
Microcontroller 300 obtains the received reference electrical signal of input equipment 100, and the reference electrical signal is transmitted to D/
A conversion circuit 900；
900 pieces of D/A modulus of conversion carry out digital-to-analogue conversion processing to the reference electrical signal, obtain with reference to electric analoging signal, and
Buffer 1000 is transmitted to reference to electric analoging signal by described；
Buffer 1000 carries out buffered with reference to electric analoging signal to described, and is transmitted to computing circuit 500；
Detection circuit 400 obtains the first value of electrical signals of driving 800 to be measured, and first value of electrical signals is transmitted to fortune
Calculate circuit 500；
Computing circuit 500 is adjusted the first value of electrical signals with reference to electric analoging signal according to described；
Detection circuit 400 obtains the second value of electrical signals of driving 800 to be measured again, and second value of electrical signals is transmitted
To microcontroller 300；
Second value of electrical signals is sent to display 200 after internal A/D conversion process by microcontroller 300, and
It is shown by display 200.
Using the method for electronic load device Test driver provided by the utility model, can not only adapt to a variety of different
Testing requirement is driven, test result can also be directly displayed, convenient for processing abnormal conditions in time；Defencive function is inside set, effectively
It ensure that the safety of the electronic load device of driving to be measured and the utility model；In addition, utilizing electricity provided by the utility model
The method of sub- load device Test driver effectively improves the working efficiency and accuracy rate of driving test.
It to be first switched on before actually using electronic load device provided by the utility model, then be read from memory
Check code, if check code correctly if initialize, otherwise memory simultaneously is written in factory reset resetting check code,
Read again check code.
After initialization, starts to carry out key scan and keystroke handling, then judge whether to start to measure, i.e., whether start
The voltage value or current value for detecting driving to be measured receive after starting measurement instruction, start to read A/D conversion value, and judging should
Whether numerical value is normal, if normal, then starts real value processing, and calculate realtime power, and the normal condition is passed through display
It is shown；If numerical value is abnormal, the numerical value is marked, carries out into abnormality tupe and by display showing this
Abnormality.
Through the above technical solutions, using the electronic load device of the utility model in driving test process, Neng Gouji
When found the abnormal situation and handled, to it is to be measured driving and test device be effectively protected, avoid burning drive to be measured
Loss and security risk caused by dynamic and test device；It can also be shown by display, it is different convenient for checking in time
Normal situation.
Compared with prior art, the structure of electronic load device provided by the utility model is simple, flexible operation, Neng Goushi
Answer a variety of different driving testing requirements；Furthermore the electronic load device of the utility model can directly display test result, just
In processing abnormal conditions in time；The electronic load device of the utility model inside sets protection circuit, is effectively guaranteed driving to be measured
And the safety of the electronic load device of the utility model；Finally, the Electronic Negative that the utility model of the utility model provides carries
The testing efficiency and accuracy set are higher.
The foregoing description of the disclosed embodiments makes those skilled in the art can be realized or use the utility model.
Various modifications to these embodiments will be apparent for a person skilled in the art, general original as defined herein
Reason can be realized in other embodiments without departing from the spirit or scope of the present utility model.Therefore, this is practical new
Type is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase
Consistent widest scope.
Claims (10)
1. a kind of electronic load device, which is characterized in that including：Input equipment, display, microcontroller, detection circuit, operation
Circuit, power module and power supply；
The input equipment, display, detection circuit and computing circuit are connect with microcontroller respectively, the detection circuit and function
Rate module is connect with computing circuit respectively, and the display, microcontroller and computing circuit connect to power supply respectively, the detection
Circuit and power module respectively with drive connection to be measured；
The detection circuit obtains the first value of electrical signals of driving to be measured, and first value of electrical signals is transmitted to operation electricity
Road；
The reference electrical signal that the computing circuit is transmitted according to microcontroller is adjusted first value of electrical signals；Wherein,
The reference electrical signal is the preset value that microcontroller is obtained by the input equipment；
The detection circuit obtains the second value of electrical signals of driving to be measured again, and second value of electrical signals is transmitted to micro-control
Device processed；
Second value of electrical signals is sent to display by the microcontroller, and is shown by display.
2. electronic load device according to claim 1, which is characterized in that further include：D/A conversion circuit and buffer；
The D/A conversion circuit and buffer are connected in series between microcontroller and computing circuit；
The D/A conversion circuit and buffer carry out digital-to-analogue conversion processing and buffered to the reference electrical signal respectively.
3. electronic load device according to claim 2, it is characterised in that：The detection circuit includes voltage detecting circuit
And current detection circuit, the computing circuit include constant voltage circuit and constant-current circuit；
The voltage detecting circuit is connect with constant voltage circuit, and the current detection circuit is connect with constant-current circuit, the voltage inspection
Slowdown monitoring circuit and current detection circuit are connect with microcontroller respectively, and the constant voltage circuit and constant-current circuit connect with buffer respectively
It connects；
The voltage detecting circuit obtains the first voltage signal value of driving to be measured, and the first voltage signal value is transmitted to
Constant voltage circuit, the reference voltage signal that the constant voltage circuit is transmitted according to microcontroller adjust the first voltage signal value
It is whole；Wherein, the reference voltage signal is the preset voltage value that microcontroller is obtained by the input equipment；
The current detection circuit obtains the first current signal value of driving to be measured, and first current signal value is transmitted to
Constant-current circuit, the reference current signal that the constant-current circuit is transmitted according to microcontroller adjust first current signal value
It is whole；Wherein, the reference current signal is the pre-set current value that microcontroller is obtained by the input equipment；
The voltage detecting circuit obtains the second voltage signal value of driving to be measured again, and the second voltage signal value is passed
Microcontroller is transported to, the second voltage signal value is sent to display by the microcontroller, and is shown by display
Show；
The current detection circuit obtains the second current signal value of driving to be measured again, and second current signal value is passed
Microcontroller is transported to, second current signal value is sent to display by the microcontroller, and is shown by display
Show.
4. electronic load device according to claim 3, which is characterized in that further include：Relay circuit；
The relay circuit includes sequentially connected first relay, the second relay and third relay；
First relay is connect with microcontroller, and third relay is connect with power module；
First relay controls the connection of driving and power module to be measured, the second relay control microcontroller and perseverance
The connection of volt circuit or constant-current circuit, third relay control the voltage gear of constant voltage circuit or the current gear of constant-current circuit
Position.
5. electronic load device according to claim 4, which is characterized in that further include：The guarantor being connect with the first relay
Protection circuit；
The protection circuit includes reverse-connection protection circuit, overvoltage crowbar, current foldback circuit, overpower-protection circuit.
6. electronic load device according to claim 1, it is characterised in that：
The input equipment includes touch key-press and rotary coding switch；
The touch key-press and rotary coding switch are connect with microcontroller respectively；
For the touch key-press for operational mode and input protection value to be arranged, the rotary coding switch is described default for adjusting
The size of value.
7. electronic load device according to claim 1, it is characterised in that：The power supply is Switching Power Supply.
8. electronic load device according to claim 2, it is characterised in that：The buffer includes that reverse phase scale operation is put
Big device.
9. electronic load device according to claim 3, it is characterised in that：
The constant voltage circuit includes comparator/operational amplifier positive-feedback circuit, and the constant-current circuit includes that comparator/operational amplifier is negative
Feed circuit.
10. electronic load device according to claim 1, which is characterized in that further include：The state being connect with microcontroller
Indicator light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721753901.3U CN208140755U (en) | 2017-12-15 | 2017-12-15 | A kind of electronic load device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721753901.3U CN208140755U (en) | 2017-12-15 | 2017-12-15 | A kind of electronic load device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208140755U true CN208140755U (en) | 2018-11-23 |
Family
ID=64283837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721753901.3U Expired - Fee Related CN208140755U (en) | 2017-12-15 | 2017-12-15 | A kind of electronic load device |
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| Country | Link |
|---|---|
| CN (1) | CN208140755U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107884606A (en) * | 2017-12-15 | 2018-04-06 | 安阳普莱电子照明有限公司 | A kind of electronic load device and the method using electronic load device Test driver |
-
2017
- 2017-12-15 CN CN201721753901.3U patent/CN208140755U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107884606A (en) * | 2017-12-15 | 2018-04-06 | 安阳普莱电子照明有限公司 | A kind of electronic load device and the method using electronic load device Test driver |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200708 Address after: 456150, Henan County, Anyang County, Tangyin Province Industrial Zone North cross two sections of the West Patentee after: Anyang Dongpu Electronic Technology Co.,Ltd. Address before: 456150, Henan County, Anyang County, Tangyin Province Industrial Zone North cross two sections of the West Patentee before: ANYANG PULAI ELECTRONIC LIGHTING Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181123 |