CN109283462A - Hand-held relay tester - Google Patents
Hand-held relay tester Download PDFInfo
- Publication number
- CN109283462A CN109283462A CN201811130263.9A CN201811130263A CN109283462A CN 109283462 A CN109283462 A CN 109283462A CN 201811130263 A CN201811130263 A CN 201811130263A CN 109283462 A CN109283462 A CN 109283462A
- Authority
- CN
- China
- Prior art keywords
- unit
- resistance
- bridge
- relay
- control module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims abstract description 68
- 238000012360 testing method Methods 0.000 claims abstract description 38
- 230000005611 electricity Effects 0.000 claims description 15
- 238000005070 sampling Methods 0.000 claims description 13
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 claims 1
- 230000032683 aging Effects 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 9
- 230000000630 rising effect Effects 0.000 description 6
- 230000001360 synchronised effect Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
- G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention discloses hand-held relay testers, including control module, drive module and contact detection module；Drive module with the coil of relay to be measured for connecting, and contact detection module with the contact of relay to be measured for connecting；Control module is used to export PWM wave to drive module, and drive module drives the coil of relay to be measured according to PWM wave, so that the actuating of relay to be measured；Contact detection module is used to act electric signal according to the movement generation of relay to be measured, and movement electric signal is exported to control module, and control module is also used to be outputed test result according to movement electric signal and PWM wave.So that drive module is driven relay to be measured using PWM wave, while obtaining the movement electric signal that contact detection module is generated according to the movement of relay to be measured, obtains test result by comparing the movement electric signal and PWM wave；It can be convenient, quickly and accurately come out the undesirable relay test such as aging.
Description
Technical field
The present invention relates to detection technique more particularly to hand-held relay testers.
Background technique
Relay is a kind of common component, but usually requires that reliability with higher.For example, for detecting half
A large amount of relay is used inside the special test equipment of conductor properties of product, the relay requirement response that test equipment uses
Speed is fast, and contact resistance is within 0.2 Ω.Relay Aging is likely to result in such as contact resistance increase or response speed lag
The problems such as, therefore, how easily and fast, quasi- therefore, Relay Aging is the main factor for causing test equipment unstable,
Really coming out the undesirable relay test such as aging is the technical issues that need to address.
Summary of the invention
For overcome the deficiencies in the prior art, the purpose of the present invention is to provide hand-held relay tester, Ke Yifang
Just, quickly and accurately the undesirable relay test such as aging is come out.
The purpose of the present invention adopts the following technical scheme that realization:
Hand-held relay tester, including control module, drive module and contact detection module；The drive module is used
It is connect in the coil of relay to be measured, the contact detection module with the contact of the relay to be measured for connecting；
The control module is used to export PWM wave to the drive module, described in the drive module drives according to PWM wave
The coil of relay to be measured, so that the actuating of relay to be measured；The contact detection module is used for according to the relay to be measured
The movement generation of device acts electric signal, and the movement electric signal is exported to the control module, and the control module is also used
Output test result according to the movement electric signal and the PWM wave.
In some implementations, the coil of the relay to be measured includes first end and second end, and the drive module includes
Bridge-type reversing unit, the bridge-type reversing unit are used for the coil power supply；The control module controls the bridge-type commutation
Unit exports the electric current by the first end to second end to the coil, or controls the bridge-type reversing unit to the line
Circle exports the electric current by the second end to first end.
In some implementations, the drive module further includes for detecting the current detecting list for flowing through the coil current
Member；
The control module is used to obtain the electric current for flowing through the coil from the current detecting unit, and flowing through
When stating the electric current of coil greater than preset value, controls the bridge-type reversing unit and switch to coil output sense of current.
In some implementations, the current detecting unit includes sampling element and amplifying circuit, the sampling element series connection
In the bridge-type reversing unit to the circuit of the coil power supply, after the amplifying circuit amplifies the output of the sampling element
It is transmitted to the control module, the control module is used to calculate the electricity for flowing through the coil according to the output of the amplifying circuit
Stream.
In some implementations, the drive module further includes driving power supply unit, and the driving power supply unit passes through described
Bridge-type reversing unit is to the coil power supply.
In some implementations, one end of the bridge-type reversing unit is connected to the driving power supply unit, and the other end passes through
The current detecting unit is connected to the ground terminal of power supply.
In some implementations, the control module is also used to be not more than preset value when the electric current for flowing through the coil, and not
When receiving the movement electric signal according to the movement generation of the relay to be measured from the contact detection module, the drive is controlled
Dynamic power supply unit increases the voltage exported to the bridge-type reversing unit.
In some implementations, the driving power supply unit includes the first voltage unit and for being connected to the control module
The voltage of two voltage cells, the first voltage unit output is less than the voltage of second voltage unit output；
The control module controls the first voltage unit by the bridge-type reversing unit to the coil power supply, if
The control module judgement flows through the electric current of the coil no more than preset value, and does not receive root from the contact detection module
According to the relay to be measured when acting the movement electric signal generated, the control module controls the second voltage unit and passes through
The bridge-type reversing unit is to the coil power supply.
In some implementations, the first voltage unit includes the first power branch and concatenated switching tube Q5 and power
Part K2-A, first power branch include the step switch K6-B coupled with the force piece K2-A；The control module control
When making switching tube Q5 conducting, the force piece K2-A is closed the step switch K6-B, so that the first voltage list
Member is to the bridge-type reversing unit output voltage；
The second voltage unit includes second source branch and concatenated switching tube Q6 and force piece K3-A, and described
Two power branch include the step switch K7-B coupled with the force piece K3-A；The control module controls the switching tube Q6
When conducting, the force piece K3-A is closed the step switch K7-B, so that the second voltage unit is changed to the bridge-type
To unit output voltage.
In some implementations, the bridge-type reversing unit includes first switch half-bridge and second switch half-bridge in parallel, institute
Stating first switch half-bridge includes concatenated switching tube Q10 and switching tube Q11, and the second switch half-bridge includes concatenated switching tube
Q9 and switching tube Q12, the first end of the coil are connected to the junction of the switching tube Q10 and switching tube Q11, the coil
Second end be connected to the junction of the switching tube Q9 and switching tube Q12, the switching tube Q10, switching tube Q11, switching tube
Q9 and switching tube Q12 controls on or off by the control module.
In some implementations, the switching tube Q10 and switching tube Q11 is connected to the first driving end of the control module,
The switching tube Q9 and switching tube Q12 is connected to the second driving end of the control module；
The switching tube Q10, switching tube Q9 are PMOS tube, and the switching tube Q11, switching tube Q12 are NMOS tube；Or
The switching tube Q10, switching tube Q9 are NMOS tube, and the switching tube Q11, switching tube Q12 are PMOS tube.
In some implementations, the relay to be measured includes first group of contact, and the contact detection module includes the first touching
Point detection unit；Resistance and preset resistive value when first contact detection unit is connected to for first group of contact,
And if first group of contact connection, and be connected to when resistance be less than preset resistive value when, to the control module export interrupt
Signal.
In some implementations, first contact detection unit includes resistance bridge unit and the first comparing unit, the electricity
One end of resistance bridge unit is connected to the anode of a power supply, and the other end is connected to the ground terminal of power supply；The resistance bridge unit includes simultaneously
The first resistor half-bridge and second resistance half-bridge of connection, the first resistor half-bridge includes concatenated resistance R3 and resistance R5, described
Second resistance half-bridge includes concatenated resistance R4 and resistance R6；First group of contact and the resistance R3, resistance R5, resistance R4
Or resistance R6 connection；
The first input end of first comparing unit is connected between the resistance R3 and resistance R5, and described first compares
Second input terminal of unit is connected to the junction of the resistance R4 and resistance R6, the output end IN1 of first comparing unit
It is connect with the control module.
In some implementations, the resistance bridge unit further includes the adjusting resistance R2 for adjusting preset resistive value, and described
One group of contact is connected with the resistance R3, and the adjusting resistance R2 is in parallel with the resistance R5.
In some implementations, the relay to be measured further includes second group of contact, and the contact detection module further includes
Two contact detection units；Resistance and pre- handicapping when second contact detection unit is connected to for second group of contact
Value, and if second group of contact connection, and be connected to when resistance be less than preset resistive value when, to the control module output in
Break signal.
In some implementations, second contact detection unit includes that resistance R10, resistance R9, resistance R11 and second compare
Unit；One end of second group of contact is connected to the resistance R3, and the other end is connected to the ground of power supply by the resistance R10
End, and it is connected to the third input terminal of second comparing unit, one end of the resistance R9 is being connected to the power supply just
End, the other end are connected to the ground terminal of power supply by the resistance R11, and are connected to the 4th input of second comparing unit
End, the output end IN2 of second comparing unit are connect with the control module.
In some implementations, second contact detection unit further includes the adjusting resistance R8 for adjusting preset resistive value,
The adjusting resistance R8 is in parallel with the resistance R10 or resistance R9.
In some implementations, hand-held relay tester further include be connected to the control module display screen and by
Key, the display screen are used to show the frequency, duty ratio and current testing time of test result and PWM wave, and the key is used
Frequency, duty ratio and the total testing time of PWM wave are exported to the drive module in the setting control module.
In some implementations, hand-held relay tester further includes the prompt unit for being connected to the control module, institute
State the action state that prompt unit is used to indicate the relay to be measured.
Compared with prior art, the beneficial effect of the embodiment of the present invention is: using PWM wave make drive module drive it is to be measured after
Electric appliance, while the movement electric signal that contact detection module is generated according to the movement of relay to be measured is obtained, by comparing the movement
Electric signal and PWM wave obtain test result；It can be convenient, quickly and accurately come out the undesirable relay test such as aging.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of hand-held relay tester provided in an embodiment of the present invention；
Fig. 2 is the schematic diagram of the movement electric signal and PWM wave that are generated according to the movement of relay to be measured；
Fig. 3 is the circuit diagram of control module in Fig. 1；
Fig. 4 is the circuit diagram of drive module in Fig. 1；
Fig. 5 be Fig. 4 in first voltage unit, second voltage unit, tertiary voltage unit control section circuit diagram；
Fig. 6 is the circuit diagram of contact detection module in Fig. 1；
Fig. 7 is the circuit diagram for being connected to the key of control module；
Fig. 8 is the circuit diagram for being connected to the prompt unit of control module.
In figure: 110, control module；120, drive module；121, power supply unit is driven；1211, first voltage unit；
1212, second voltage unit；122, bridge-type reversing unit；123, current detecting unit；1231, sampling element；1232, amplification electricity
Road；130, contact detection module；131, the first contact detection unit；1311, resistance bridge unit；1312, the first comparing unit；
132, the second contact detection unit；1321, the second comparing unit；140, interface module；141, coil end interface；142, tip side
Interface；200, relay to be measured；210, coil；211, first end；212, second end；220, contact.
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the present invention, it should be noted that not
Under the premise of conflicting, new implementation can be formed between various embodiments described below or between each technical characteristic in any combination
Example.
It is as shown in Figure 1 the structural schematic diagram of hand-held relay tester.
Hand-held relay tester includes control module 110, drive module 120 and contact detection module 130.Wherein drive
For connecting with the coil 210 of relay 200 to be measured, contact detection module 130 is used for and relay 200 to be measured dynamic model block 120
Contact 220 connect.
In some possible embodiments, hand-held relay tester further includes interface module 140, interface module 140
Including the coil end interface 141 for being connect with the coil 210 of relay 200 to be measured, and for relay 200 to be measured
The contact end interface 142 that contact 220 connects；Drive module 120 is connected between control module 110 and coil end interface 141, touching
Point detection module 130 is connected between control module 110 and contact end interface 142.
Control module 110 is used to export PWM (Pulse Width Modulation) wave, i.e. pulse to drive module 120
Width modulated wave.Illustratively, the frequency for the PWM wave that control module 110 is exported to drive module 120 is 0Hz-30Hz, duty
Than for 10%-90%.
Drive module 120 drives the coil 210 of relay 200 to be measured according to PWM wave, so that relay to be measured 200 acts；
Illustratively, common is connected to by relay 200 to be measured in the rising edge of PWM wave with normally opened contact, in the failing edge of PWM wave
Common and normally opened contact are disconnected.Contact detection module 130 is used to act electricity according to the movement generation of relay 200 to be measured
Signal, and movement electric signal is exported to control module 110, control module 110 is also used to according to the movement electric signal received
Output test result with PWM wave.
As shown in Fig. 2, first waveform indicates that drive module 120 is applied to the voltage on 200 coil 210 of relay to be measured
Waveform.It is dynamic that Article 2 waveform and Article 3 waveform indicate that contact detection module 130 is generated according to the movement of relay 200 to be measured
Make electric signal waveform, the rising edge of Article 2 waveform and Article 3 waveform indicate the common of relay 200 to be measured with it is normally opened
Contact connection, failing edge indicate that the common of relay 200 to be measured and normally opened contact disconnect.
Obtained from Article 2 waveform and first waveform comparison, the action state of relay 200 to be measured, i.e. common with
It the connection of normally opened contact and disconnects and to be applied to the rising edge of voltage waveform and failing edge on 200 coil 210 of relay to be measured equal
Synchronous, therefore, which can correctly act according to the waveform of driving coil 210, switch switch state.And the
Two waveforms and first waveform comparison, the action state of relay 200 to be measured and are applied to 200 coil 210 of relay to be measured
The rising edge of upper voltage waveform is not sometimes synchronous with failing edge.At M1, the movement of relay 200 to be measured is compared to being applied to
Waveform on coil 210 has a delay, therefore the relay 200 to be measured the phenomenon that there are response lags；At M2, relay to be measured
200 do not respond to driving of the drive module 120 to coil 210；At M3, powered on when being applied to 200 coil 210 of relay to be measured
When corrugating is in failing edge not yet, the common of relay 200 to be measured is disconnected with normally opened contact in advance, indicates that this is to be measured
The connection of 200 common of relay and normally opened contact is not able to maintain time enough, there is the phenomenon that disconnecting in advance.
In some possible embodiments, control module 110 to the PWM wave that drive module 120 exports include several weeks
Phase may be implemented lead to cycle number same number contained by PWM wave to relay 200 to be measured such as 1-2000 period
Disconnected detection.As shown in Fig. 2, the drive module 120 that first waveform indicates is applied to the electricity on 200 coil 210 of relay to be measured
Corrugating includes 5 periods, therefore 5 on-off detections can be carried out to the relay 200 to be measured.Article 2 waveform indicates to be measured
Relay 200 can be acted correctly in 5 detections；Article 3 waveform indicates that relay 200 to be measured only has in 5 detections
It can correctly act twice, therefore the corresponding relay 200 to be measured of Article 3 waveform is bad relay.
In some possible embodiments, the movement of relay 200 to be measured and the nonsynchronous number of PWM wave reach default threshold
Value, then judge that relay 200 to be measured for bad relay, can terminate in advance detection；In other feasible embodiments, control
Molding block 110 to the PWM wave that drive module 120 exports include several periods, when the movement and PWM wave of relay 200 to be measured
The ratio of synchronous number and number of cycles be not more than proportion threshold value when, or when relay 200 to be measured movement and PWM wave not
When the ratio of synchronous number and number of cycles is greater than proportion threshold value, then judge relay 200 to be measured for bad relay.
As shown in figure 3, control module 110 includes processor chips U3, illustratively, processor chips U3 is mono- using STC
Piece machine, such as can be the chip of model STC12C5A6052.
In some possible embodiments, as shown in figure 3, hand-held relay tester further includes being connected to control module
110 display screen J1.Control module 110, for user information interaction, shows test parameter and test data by display screen J1,
Such as can output test result, such as output indicates the qualified and/or underproof information of relay 200 to be measured, relay to be measured
200 movement number synchronous and/or nonsynchronous with PWM wave or PWM wave include the number in period, i.e., need to test in total
Number.
Illustratively, LCD1206, LCD12864 or OLED screen can be used in display screen J1.
In some possible embodiments, as shown in figure 4, the coil 210 of relay to be measured 200 includes 211 He of first end
Second end 212, drive module 120 include bridge-type reversing unit 122, and bridge-type reversing unit 122 is used to power to coil 210.
Control module 110 controls bridge-type reversing unit 122 and exports to coil 210 by first end 211 to the electricity of second end 212
Stream, or control bridge-type reversing unit 122 are exported to coil 210 by second end 212 to the electric current of first end 211.To control
Module 110 can be switched by bridge-type reversing unit 122 is applied to sense of current on 200 coil 210 of relay to be measured.Right
When the relay to be measured 200 of a certain model of a batch is tested, control module 110 controls bridge-type reversing unit 122 to coil 210
The electric current for exporting a direction, when the relay to be measured 200 to another batch of another model is tested, control module 110 is controlled
Bridge-type reversing unit 122 exports the electric current of other direction to coil 210；To extend the test of hand-held relay tester
Object range.
In some possible embodiments, bridge-type reversing unit 122 includes first switch half-bridge and second switch in parallel
Half-bridge；Wherein, first switch half-bridge includes concatenated switching tube Q10 and switching tube Q11, and second switch half-bridge includes concatenated opens
Close pipe Q9 and switching tube Q12.The first end 211 of coil 210 is connected to the junction of switching tube Q10 and switching tube Q11, coil
210 second end 212 is connected to the junction of switching tube Q9 and switching tube Q12, switching tube Q10, switching tube Q11, switching tube Q9
On or off is controlled by control module 110 with switching tube Q12.
In some possible embodiments, switching tube Q10 and switching tube Q11 is connected to the first driving of control module 110
End DRIVER_H, switching tube Q9 and switching tube Q12 are connected to the second driving end DRIVER_L of control module 110.Wherein switch
Pipe Q10, switching tube Q9 are PMOS tube, and switching tube Q11, switching tube Q12 are NMOS tube；Or switching tube Q10, switching tube Q9 are
NMOS tube, switching tube Q11, switching tube Q12 are PMOS tube.
In some possible embodiments, drive module 120 further includes flowing through 200 coil of relay to be measured for detecting
The current detecting unit 123 of 210 electric currents.
Control module 110 is used to obtain the electric current for flowing through the coil 210 from current detecting unit 123.Work as control module
110 detect flowing through coil 210 electric current be greater than preset value when, it can be determined that the positive and negative anodes of coil 210 are reversed, i.e., bridge-type commutate
Unit 122 outputs the electric current of opposite direction to coil 210.To which control module 110 can control the switching of bridge-type reversing unit 122
Sense of current is exported to coil 210.Therefore, when be applied on 200 coil 210 of relay to be measured sense of current and it is to be measured after
It, can be according to the electric current for flowing through the coil 210 obtained from current detecting unit 123 certainly when the requirement of electric appliance 200 mismatches
It is dynamic to realize that corrigendum exports sense of current to coil 210, therefore even if to a batch have the relay to be measured 200 of different model into
When row test, the careful positive and negative anodes for distinguishing 200 coil 210 of relay to be measured can also not had to.
In some possible embodiments, current detecting unit 123 includes sampling element 1231 and amplifying circuit 1232, is adopted
Sample element 1231 is series at the circuit that bridge-type reversing unit 122 is powered to coil 210.
In the present embodiment, amplifying circuit 1232 includes the chip U6-A of model LM358, and is connected to chip U6-A
Resistor network；Chip U6-A and resistor network form reversed scale operation amplifying circuit 1232.
Amplifying circuit 1232 is transmitted to control module 110 after amplifying the output of sampling element 1231.Control module 110 is used
The electric current for flowing through the coil 210 is calculated in the output according to amplifying circuit 1232.
Illustratively, sampling element 1231 includes sampling resistor R27, can convert voltage for the electric current of flowing through coil 210
Value, the voltage value are transmitted to control module 110 after the processing of amplifying circuit 1232.Processor chips U3 in control module 110
Analog-digital conversion function can be carried, it can treated that signal is converted to digital value by amplifying circuit 1232；Or control module 110
It further include the modulus switching device for being connected to processor chips U3, the voltage value is after the processing of amplifying circuit 1232 through analog-to-digital conversion
Device is converted to digital value and is transmitted to control module 110.To which control module 110 can be used for according to the defeated of amplifying circuit 1232
The electric current of flowing through coil 210 is calculated out.
In some possible embodiments, drive module 120 further includes driving power supply unit 121, drives power supply unit 121
It is powered by bridge-type reversing unit 122 to coil 210.
In some possible embodiments, one end of bridge-type reversing unit 122 is connected to driving power supply unit 121, another
End is connected to low level by the sampling element 1231 in current detecting unit 123, is such as grounded；Convenient for bridge-type reversing unit 122,
Sampling element 1231, the reasonable Arrangement of amplifying circuit 1232 on circuit boards.
In some possible embodiments, control module 110 is also used to when the electricity for flowing through 200 coil 210 of relay to be measured
Stream is not more than preset value, and does not receive the movement electricity generated according to the movement of relay 200 to be measured from contact detection module 130
When signal, control driving power supply unit 121 increases the voltage exported to bridge-type reversing unit 122.Flow through 200 line of relay to be measured
The electric current of circle 210 is not more than preset value, and it is reversed to indicate that the electric current for being applied to coil 210 does not have, but relay 200 to be measured at this time
It does not act, then may be because bridge-type reversing unit 122 is that the voltage that coil 210 provides is too small；Such as relay 200 to be measured
It is required that 210 voltage of coil be 12V, but it is 5V that bridge-type reversing unit 122, which is the voltage that coil 210 provides, then needs to drive
Power supply unit 121 increases the voltage exported to bridge-type reversing unit 122, to meet coil 210 required by relay 200 to be measured
Voltage.
In some possible embodiments, as shown in figure 4, driving power supply unit 121 includes being connected to control module 110
First voltage unit 1211 and second voltage unit 1212, the voltage that first voltage unit 1211 exports are less than second voltage unit
The voltage of 1212 outputs.In the present embodiment, the voltage that first voltage unit 1211 is exported to bridge-type reversing unit 122 is 5V,
The voltage that second voltage unit 1212 is exported to bridge-type reversing unit 122 is 12V；In another implementation, first voltage unit
1211 voltages exported to bridge-type reversing unit 122 are 12V, and second voltage unit 1212 is exported to bridge-type reversing unit 122
Voltage is 24V.
If control module 110 judges that the electric current of flowing through coil 210 is not more than preset value, and not from contact detection module 130
When receiving the movement electric signal according to the movement generation of relay 200 to be measured, control module 110 is by control first voltage unit
1211 are powered by bridge-type reversing unit 122 to coil 210, and conversion to control second voltage unit 1212 is commutated single by bridge-type
Member 122 is powered to coil 210；To realize that bridge-type reversing unit 122 is increased to 12V by 5V for the voltage that coil 210 provides, or
Person is increased to 24V by 12V.
In the present embodiment, driving power supply unit 121 includes first voltage unit 1211, second voltage unit 1212, is gone back
Including tertiary voltage unit；The voltage that first voltage unit 1211 exports is less than the voltage that second voltage unit 1212 exports, the
The voltage of two voltage cells 1212 output is less than the voltage of tertiary voltage unit output.First voltage unit 1211 commutates to bridge-type
The voltage that unit 122 exports is 5V, and the voltage that second voltage unit 1212 is exported to bridge-type reversing unit 122 is 12V, third electricity
The voltage that pressure unit is exported to bridge-type reversing unit 122 is 24V.
In some possible embodiments, as shown in Figure 4 and Figure 5, first voltage unit 1211 includes the first power branch
And concatenated switching tube Q5 and force piece K2-A, the first power branch include the step switch K6- coupled with force piece K2-A
B.When 110 control switch pipe Q5 of control module is connected, force piece K2-A is closed step switch K6-B, so that first voltage unit
1211 to 122 output voltage of bridge-type reversing unit.
Second voltage unit 1212 includes second source branch and concatenated switching tube Q6 and force piece K3-A, the second electricity
Source branch includes the step switch K7-B coupled with force piece K3-A.
Tertiary voltage unit includes third power branch and concatenated switching tube Q7 and force piece K4-A, second source branch
Road includes the step switch K8-B coupled with force piece K4-A.
When 110 control switch pipe Q6 of control module is connected, force piece K3-A is closed step switch K7-B, so that the second electricity
Press unit 1212 to 122 output voltage of bridge-type reversing unit.
If control module 110 judges that the electric current of flowing through coil 210 is not more than preset value, and not from contact detection module 130
When receiving the movement electric signal according to the movement generation of relay 200 to be measured, 110 control switch pipe Q5 of control module shutdown,
Force piece K2-A power loss, so that step switch K6-B is disconnected, first voltage unit 1211 stops to bridge-type reversing unit 122
Output voltage；And 110 control switch pipe Q6 of control module conducting, force piece K3-A is powered on, so that step switch K7-B
Closure, second voltage unit 1212 start to 122 output voltage of bridge-type reversing unit.In the present embodiment, the first power branch
It is connected to the level of 5V, second source branch is connected to the level of 12V.To realize that bridge-type reversing unit 122 is that coil 210 mentions
The voltage of confession is increased to 12V by 5V；In another embodiment, second source branch is connected to the level of 12V, second source branch
It is connected to the level of 24V；To realize that bridge-type reversing unit 122 is that the voltage that coil 210 provides is increased by 12V as 24V.
In some possible embodiments, control module 110 controls driving power supply unit 121 for a lower electricity first
Pressure, if 5V is applied on the coil 210 of relay 200 to be measured by bridge-type reversing unit 122, the direction example of voltage on coil 210
As for by first end 211 to second end 212；If control module 110 detects that the electric current of flowing through coil 210 is greater than preset value,
That is the positive and negative anodes of coil 210 are reversed, then control bridge-type reversing unit 122 cut commutating coil 210 export sense of current, by this compared with
Low voltage is applied on the coil 210 of relay 200 to be measured, on coil 210 direction of voltage be, for example, by second end 212 to
First end 211.If control module 110 is not received from contact detection module 130 according to the dynamic of relay 200 to be measured yet at this time
Make the movement electric signal generated, then the control of control module 110 driving power supply unit 121 is by a higher voltage, if 12V is by bridge-type
Reversing unit 122 is applied on the coil 210 of relay 200 to be measured.
In some possible embodiments, on coil 210 apply 12V voltage after, if control module 110 not yet from
Contact detection module 130 receives the movement electric signal generated according to the movement of relay 200 to be measured, then control module 110 is controlled
System driving power supply unit 121 is by a higher voltage, as 24V is applied to by bridge-type reversing unit 122 line of relay 200 to be measured
On circle 210.
By the way that the driving power supply unit 121 of multiple voltage value can be exported to bridge-type reversing unit 122, application can be automatically adjusted
Voltage on the coil 210 of relay 200 to be measured realizes the detection to multiple voltage specification relay to be measured 200, thus
The test object range of hand-held relay tester is further expanded.And have small to applying the voltage to relay to be measured greatly
On the coil 210 of device 200, can prevent relay to be measured 200 from itself being destroyed, and can prevent on circuit board it is to be measured after
200 peripheral circuit of electric appliance is destroyed, to realize relay on-line testing.
In some possible embodiments, as shown in fig. 6, relay to be measured 200 includes first group of contact, contact end interface
142 for connecting first group of contact of relay 200 to be measured.Illustratively, first group of contact include common COM with it is normally closed
Contact NC.
Contact detection module 130 includes the first contact detection unit 131, and the first contact detection unit 131 is for comparing the
Resistance and preset resistive value when the connection of one group of contact, and if first group of contact connection, and resistance when being connected to is less than pre- handicapping
When value, interrupt signal is exported to control module 110, acts electric signal as according to the movement generation of relay 200 to be measured.
In some possible embodiments, contact detection module 130 is connected to processor chips U3 in control module 110
External interrupt input port；Therefore control module 110 interrupts the action response of energy real-time detection relay 200 to be measured by receiving.
It is in rising edge when being applied to voltage waveform on 200 coil 210 of relay to be measured, relay 200 to be measured acts, public
Contact COM and normally-closed contact NC is disconnected altogether；It is in failing edge when being applied to voltage waveform on 200 coil 210 of relay to be measured, to
It surveys relay 200 to reoperate, first group of contact connection, i.e., common COM is connected to normally-closed contact NC.
When first group of contact is connected to, if resistance when first group of contact connection is greater than preset resistive value, preset resistive value example
As such as 0.2 ohm, then the connection of current common COM and normally-closed contact NC is unreliable, and contact detection module 130 is not to control
Module 110 exports interrupt signal, i.e. not output action electric signal；Control module 110 can lacking according to movement electric signal waveform
Lose determine this time test in relay 200 to be measured do not act correctly.
In some possible embodiments, as shown in fig. 6, the first contact detection unit 131 includes resistance bridge unit 1311
With the first comparing unit 1312.Illustratively, the first comparing unit 1312 includes comparator U1.
One end of resistance bridge unit 1311 is connected to the anode of a power supply, and voltage is, for example, 24V, and the other end is connected to electricity
The ground terminal in source.Resistance bridge unit 1311 includes first resistor half-bridge and second resistance half-bridge in parallel, and first resistor half-bridge includes
Concatenated resistance R3 and resistance R5, second resistance half-bridge include concatenated resistance R4 and resistance R6.
First group of contact is connect with resistance R3, resistance R5, resistance R4 or resistance R6；Such as with resistance R3, resistance R5, resistance
A serial or parallel connection in R4, resistance R6.In the present embodiment, first group of contact, i.e. common COM and normally-closed contact NC
It is connected on the branch of resistance R3.
The first input end of first comparing unit 1312 is connected between the branch and resistance R5 where resistance R3, the first ratio
Compared with the junction that the second input terminal of unit 1312 is connected to resistance R4 and resistance R6.The output end of first comparing unit 1312
IN1 is connect with control module 110.
If the resistance when connection of first group of contact is greater than preset resistive value, such as larger than 0.2 ohm, then the first comparing unit
1312, according to the voltage difference between first input end and the second input terminal, are exported to control module 110 by output end IN1 and are interrupted
Signal.Resistance when first group of contact connection is realized by resistance bridge unit 1311 compared with preset resistive value, precision is higher, can
To reach 0.05 ohm.In some possible embodiments, resistance R3, resistance R5, resistance R4, resistance R6 use error 0.1%
Precision resister.
In some possible embodiments, resistance bridge unit 1311 further includes the adjusting resistance for adjusting preset resistive value
R2, first group of contact are connected with resistance R3, and it is in parallel with resistance R5 to adjust resistance R2.So as to adjust preset resistive value, specifically may be used
Model, batch according to relay 200 to be measured etc. adjust preset resistive value by adjusting resistance R2；To realize the accuracy of test.
In some possible embodiments, relay 200 to be measured further includes second group of contact, and contact end interface 142 is also used
In second group of contact for connecting relay 200 to be measured.Illustratively, second group of contact includes common COM and normally opened contact
NO。
Contact detection module 130 further includes the second contact detection unit 132, and the second contact detection unit 132 is for comparing
Resistance and preset resistive value when the connection of second group of contact, and if second group of contact connection, and resistance when being connected to be less than it is default
When resistance value, interrupt signal is exported to control module 110, acts electric signal as according to the movement generation of relay 200 to be measured.
It is in rising edge when being applied to voltage waveform on 200 coil 210 of relay to be measured, relay 200 to be measured acts, public
Contact COM is connected to normally opened contact NO altogether；It is in failing edge when being applied to voltage waveform on 200 coil 210 of relay to be measured, to
It surveys relay 200 to reoperate, second group of contact disconnects, i.e. common COM and normally opened contact NO are disconnected.
When second group of contact is connected to, if resistance when second group of contact connection is greater than preset resistive value, such as larger than 0.2 Europe
Nurse, then the connection of current common COM and normally opened contact NO is unreliable, and contact detection module 130 is not defeated to control module 110
Interrupt signal out, i.e. not output action electric signal；Control module 110 can determine this time according to the missing of movement electric signal waveform
Relay 200 to be measured does not act correctly in test.
In some possible embodiments, the second contact detection unit 132 include resistance R10, resistance R9, resistance R11 and
Second comparing unit 1321；Illustratively, the second comparing unit 1321 includes comparator U5.
One end of second group of contact is connected to resistance R3, and the other end is connected to the ground terminal of power supply, Yi Jilian by resistance R10
It is connected to the third input terminal of the second comparing unit 1321.
One end of resistance R9 is connected to the anode of power supply, and for example such as 24V, the other end are connected to voltage by resistance R11
The ground terminal of power supply, and it is connected to the 4th input terminal of the second comparing unit 1321, the output end IN2 of the second comparing unit 1321
It is connect with control module 110.
To which resistance R10, resistance R9, resistance R11 and resistance R3 constitute another resistance bridge, realize second group of contact
For resistance when connection compared with preset resistive value, precision is higher.
In some possible embodiments, the second contact detection unit 132 further includes the adjusting for adjusting preset resistive value
It is in parallel with resistance R10 to adjust resistance R8 by resistance R8.It, specifically can be according to relay 200 to be measured so as to adjust preset resistive value
Model, batch etc. adjust preset resistive value by adjusting resistance R8；To realize the accuracy of test.
As shown in fig. 7, hand-held relay tester further includes the key for being connected to control module 110, such as in this reality
It applies in example, key S1-A, S2-A, S3-A, S4-A are connected to control module 110.Display screen J1 for showing test result, and
Frequency, duty ratio and the current testing time of PWM wave, key export PWM to drive module 120 for control module 110 to be arranged
Frequency, duty ratio and the total testing time of wave.Illustratively, key S1-A, S2-A, S3-A, S4-A be respectively Menu key,
Upper skip key, lower skip key, acknowledgement key, wherein acknowledgement key, which has, starts to test, and suspends and stop the multiplexing function of test.
In some possible embodiments, as shown in figure 8, hand-held relay tester further includes being connected to control module
110 prompt unit.Prompt unit is used to indicate the action state of relay 200 to be measured.Illustratively, prompt unit includes bee
Ring device U4 and indicator light D1, indicator light D2.Illustratively, contact detection module 130 exports interrupt signal to control module 110
When, control module 110 drives indicator light D1, indicator light D2 indicating relay working condition, and driving buzzer prompt test
As a result.
Hand-held relay tester provided in an embodiment of the present invention, using PWM wave make drive module 120 drive it is to be measured after
Electric appliance 200, while the movement electric signal that contact detection module 130 is generated according to the movement of relay 200 to be measured is obtained, pass through ratio
Test result is obtained compared with the movement electric signal and PWM wave；It can be convenient, quickly and accurately by the undesirable relay inspection such as aging
It measures and.
The above embodiment is only the preferred embodiment of the present invention, and the scope of protection of the present invention is not limited thereto,
The variation and replacement for any unsubstantiality that those skilled in the art is done on the basis of the present invention belong to institute of the present invention
Claimed range.
Claims (19)
1. hand-held relay tester, it is characterised in that: including control module, drive module and contact detection module；It is described
Drive module with the coil of relay to be measured for connecting, and the contact detection module is for the contact with the relay to be measured
Connection；
The control module is used to export PWM wave to the drive module, and the drive module drives described to be measured according to PWM wave
The coil of relay, so that the actuating of relay to be measured；The contact detection module is used for according to the relay to be measured
It acts generation and acts electric signal, and the movement electric signal is exported to the control module, the control module is also used to root
Output test result according to the movement electric signal and the PWM wave.
2. hand-held relay tester as described in claim 1, it is characterised in that: the coil of the relay to be measured includes
First end and second end, the drive module include bridge-type reversing unit, and the bridge-type reversing unit is used to supply to the coil
Electricity；The control module controls electric current of the bridge-type reversing unit to coil output by the first end to second end,
Or the control bridge-type reversing unit exports the electric current by the second end to first end to the coil.
3. hand-held relay tester as claimed in claim 2, it is characterised in that: the drive module further includes for examining
Current detecting unit of the flow measurement through the coil current；
The control module is used to obtain the electric current for flowing through the coil from the current detecting unit, and is flowing through the line
When the electric current of circle is greater than preset value, controls the bridge-type reversing unit and switch to coil output sense of current.
4. hand-held relay tester as claimed in claim 3, it is characterised in that: the current detecting unit includes sampling
Element and amplifying circuit, the sampling element are series at the bridge-type reversing unit to the circuit of the coil power supply, described to put
Big circuit is transmitted to the control module after amplifying the output of the sampling element, the control module according to for putting
The output of big circuit calculates the electric current for flowing through the coil.
5. hand-held relay tester as claimed in claim 3, it is characterised in that: the drive module further includes that driving supplies
Electric unit, the driving power supply unit is by the bridge-type reversing unit to the coil power supply.
6. hand-held relay tester as claimed in claim 5, it is characterised in that: one end of the bridge-type reversing unit connects
It is connected to the driving power supply unit, the other end is connected to the ground terminal of power supply by the current detecting unit.
7. hand-held relay tester as claimed in claim 5, it is characterised in that: the control module is also used to work as and flow through
The electric current of the coil is not more than preset value, and does not receive from the contact detection module according to the dynamic of the relay to be measured
When making the movement electric signal generated, controls the driving power supply unit and increase the voltage exported to the bridge-type reversing unit.
8. hand-held relay tester as claimed in claim 7, it is characterised in that: the driving power supply unit includes connection
In the first voltage unit and second voltage unit of the control module, the voltage of the first voltage unit output is less than described
The voltage of second voltage unit output；
The control module controls the first voltage unit by the bridge-type reversing unit to the coil power supply, if described
Control module judgement flows through the electric current of the coil no more than preset value, and does not receive from the contact detection module according to institute
When stating the movement electric signal of movement generation of relay to be measured, the control module controls the second voltage unit described in
Bridge-type reversing unit is to the coil power supply.
9. hand-held relay tester as claimed in claim 8, it is characterised in that: the first voltage unit includes first
Power branch and concatenated switching tube Q5 and force piece K2-A, first power branch include and the force piece K2-A coupling
The step switch K6-B of conjunction；When the control module controls switching tube Q5 conducting, the force piece K2-A makes the movement
Switch K6-B closure, so that the first voltage unit is to the bridge-type reversing unit output voltage；
The second voltage unit includes second source branch and concatenated switching tube Q6 and force piece K3-A, second electricity
Source branch includes the step switch K7-B coupled with the force piece K3-A；The control module controls the switching tube Q6 conducting
When, the force piece K3-A is closed the step switch K7-B, so that the second voltage unit is single to bridge-type commutation
First output voltage.
10. hand-held relay tester as claimed in claim 2, it is characterised in that: the bridge-type reversing unit includes simultaneously
The first switch half-bridge and second switch half-bridge of connection, the first switch half-bridge include concatenated switching tube Q10 and switching tube
Q11, the second switch half-bridge include concatenated switching tube Q9 and switching tube Q12, and the first end of the coil is connected to described
The junction of switching tube Q10 and switching tube Q11, the second end of the coil are connected to the switching tube Q9's and switching tube Q12
Junction, the switching tube Q10, switching tube Q11, switching tube Q9 and switching tube Q12 by the control module control conducting or
Shutdown.
11. hand-held relay tester as claimed in claim 10, it is characterised in that: the switching tube Q10 and switching tube
Q11 is connected to the first driving end of the control module, and the switching tube Q9 and switching tube Q12 are connected to the control module
Second driving end；
The switching tube Q10, switching tube Q9 are PMOS tube, and the switching tube Q11, switching tube Q12 are NMOS tube；Or
The switching tube Q10, switching tube Q9 are NMOS tube, and the switching tube Q11, switching tube Q12 are PMOS tube.
12. such as hand-held relay tester of any of claims 1-8, it is characterised in that: the relay to be measured
Device includes first group of contact, and the contact detection module includes the first contact detection unit；First contact detection unit is used
In first group of contact be connected to when resistance and preset resistive value, and if first group of contact connection, and be connected to when
Resistance be less than preset resistive value when, to the control module export interrupt signal.
13. hand-held relay tester as claimed in claim 12, it is characterised in that: the first contact detection unit packet
Resistance bridge unit and the first comparing unit are included, one end of the resistance bridge unit is connected to the anode of a power supply, other end connection
In the ground terminal of power supply；The resistance bridge unit includes first resistor half-bridge and second resistance half-bridge in parallel, the first resistor
Half-bridge includes concatenated resistance R3 and resistance R5, and the second resistance half-bridge includes concatenated resistance R4 and resistance R6；Described
One group of contact is connect with the resistance R3, resistance R5, resistance R4 or resistance R6；
The first input end of first comparing unit is connected between the resistance R3 and resistance R5, first comparing unit
The second input terminal be connected to the junction of the resistance R4 and resistance R6, the output end IN1 of first comparing unit and institute
State control module connection.
14. hand-held relay tester as claimed in claim 13, it is characterised in that: the resistance bridge unit further includes using
In the adjusting resistance R2 for adjusting preset resistive value, first group of contact is connected with the resistance R3, the adjusting resistance R2 and institute
It is in parallel to state resistance R5.
15. hand-held relay tester as claimed in claim 13, it is characterised in that: the relay to be measured further includes
Two groups of contacts, the contact detection module further include the second contact detection unit；Second contact detection unit is for comparing
Second group of contact be connected to when resistance and preset resistive value, and if second group of contact connection, and be connected to when resistance
When less than preset resistive value, interrupt signal is exported to the control module.
16. hand-held relay tester as claimed in claim 15, it is characterised in that: the second contact detection unit packet
Include resistance R10, resistance R9, resistance R11 and the second comparing unit；One end of second group of contact is connected to the resistance R3,
The other end is connected to the ground terminal of power supply by the resistance R10, and is connected to the third input terminal of second comparing unit,
One end of the resistance R9 is connected to the anode of the power supply, and the other end is connected to the ground terminal of power supply by the resistance R11, with
And it is connected to the 4th input terminal of second comparing unit, the output end IN2 of second comparing unit and the control mould
Block connection.
17. hand-held relay tester as claimed in claim 16, it is characterised in that: second contact detection unit is also
It is in parallel with the resistance R10 or resistance R9 including adjusting the resistance R8, the adjusting resistance R8 for adjusting preset resistive value.
18. such as hand-held relay tester of any of claims 1-8, it is characterised in that: further include being connected to
The display screen and key of the control module, the display screen are used to show frequency, the duty ratio of test result and PWM wave
With current testing time, the key is used to be arranged frequency, the duty that the control module exports PWM wave to the drive module
Than and total testing time.
19. such as hand-held relay tester of any of claims 1-8, it is characterised in that: further include being connected to
The prompt unit of the control module, the prompt unit are used to indicate the action state of the relay to be measured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811130263.9A CN109283462A (en) | 2018-09-27 | 2018-09-27 | Hand-held relay tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811130263.9A CN109283462A (en) | 2018-09-27 | 2018-09-27 | Hand-held relay tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109283462A true CN109283462A (en) | 2019-01-29 |
Family
ID=65182439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811130263.9A Pending CN109283462A (en) | 2018-09-27 | 2018-09-27 | Hand-held relay tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109283462A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110806539A (en) * | 2019-11-26 | 2020-02-18 | 深圳赛意法微电子有限公司 | Detector for relay and driving chip |
| CN113125945A (en) * | 2020-01-15 | 2021-07-16 | 中国商用飞机有限责任公司 | Onboard relay testing system and onboard relay testing method |
| CN113589218A (en) * | 2021-08-06 | 2021-11-02 | 广西电网有限责任公司贵港供电局 | Action tester of external circuit breaker of cost control electric energy meter |
| WO2022238361A1 (en) * | 2021-05-12 | 2022-11-17 | Phoenix Contact Gmbh & Co. Kg | Contact monitoring apparatus for a three-pole changeover contact |
| CN116106731A (en) * | 2022-09-08 | 2023-05-12 | 深圳深爱半导体股份有限公司 | Relay testing device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08293238A (en) * | 1995-04-21 | 1996-11-05 | Mitsuba Electric Mfg Co Ltd | Detecting circuit for checking contact of relay |
| JP2009289671A (en) * | 2008-05-30 | 2009-12-10 | Yazaki Corp | Relay control device |
| CN106772017A (en) * | 2017-01-17 | 2017-05-31 | 云南电网有限责任公司西双版纳供电局 | Actuating of relay power automatic measuring instrument |
| CN107741562A (en) * | 2017-10-30 | 2018-02-27 | 辽东学院 | A kind of tester of automotive intelligent starter relay |
| CN108152730A (en) * | 2018-01-15 | 2018-06-12 | 南京工业职业技术学院 | A kind of AUTOMOTIVE RELAY detection device |
| CN209102871U (en) * | 2018-09-27 | 2019-07-12 | 深圳赛意法微电子有限公司 | Hand-held relay tester |
-
2018
- 2018-09-27 CN CN201811130263.9A patent/CN109283462A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08293238A (en) * | 1995-04-21 | 1996-11-05 | Mitsuba Electric Mfg Co Ltd | Detecting circuit for checking contact of relay |
| JP2009289671A (en) * | 2008-05-30 | 2009-12-10 | Yazaki Corp | Relay control device |
| CN106772017A (en) * | 2017-01-17 | 2017-05-31 | 云南电网有限责任公司西双版纳供电局 | Actuating of relay power automatic measuring instrument |
| CN107741562A (en) * | 2017-10-30 | 2018-02-27 | 辽东学院 | A kind of tester of automotive intelligent starter relay |
| CN108152730A (en) * | 2018-01-15 | 2018-06-12 | 南京工业职业技术学院 | A kind of AUTOMOTIVE RELAY detection device |
| CN209102871U (en) * | 2018-09-27 | 2019-07-12 | 深圳赛意法微电子有限公司 | Hand-held relay tester |
Non-Patent Citations (1)
| Title |
|---|
| 霍亮生 等: "便携式智能继电器测试系统研制", 新技术新工艺, no. 09, 31 December 2001 (2001-12-31), pages 4 - 6 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110806539A (en) * | 2019-11-26 | 2020-02-18 | 深圳赛意法微电子有限公司 | Detector for relay and driving chip |
| CN113125945A (en) * | 2020-01-15 | 2021-07-16 | 中国商用飞机有限责任公司 | Onboard relay testing system and onboard relay testing method |
| WO2022238361A1 (en) * | 2021-05-12 | 2022-11-17 | Phoenix Contact Gmbh & Co. Kg | Contact monitoring apparatus for a three-pole changeover contact |
| BE1029400B1 (en) * | 2021-05-12 | 2022-12-12 | Phoenix Contact Gmbh & Co | Contact monitoring device for a three-pole changeover contact |
| CN113589218A (en) * | 2021-08-06 | 2021-11-02 | 广西电网有限责任公司贵港供电局 | Action tester of external circuit breaker of cost control electric energy meter |
| CN116106731A (en) * | 2022-09-08 | 2023-05-12 | 深圳深爱半导体股份有限公司 | Relay testing device |
| CN116106731B (en) * | 2022-09-08 | 2023-12-29 | 深圳深爱半导体股份有限公司 | Relay testing device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109283462A (en) | Hand-held relay tester | |
| CN209102871U (en) | Hand-held relay tester | |
| CN107132449B (en) | Socket test circuit | |
| CN104730365A (en) | Household appliance fault detecting device and method | |
| CN206505161U (en) | A kind of new and effective key-press status detection circuit | |
| CN202798440U (en) | Intelligent braking unit for inverters | |
| CN205232455U (en) | Multichannel resonant frequency test system | |
| CN104345267B (en) | Aging and early failure detection method and detection apparatus of solid relay | |
| CN201477185U (en) | Tester for an electronic plastic shell breaker | |
| CN207184436U (en) | Kiloampere heavy current pulse signal generation device and DIDT test equipments | |
| CN202720317U (en) | Bouncing test device used for single coil magnetic latching relay | |
| CN102830348A (en) | Bounce testing device for single-coil magnetic-latching relay and test method of bounce testing device | |
| CN203838276U (en) | Low-voltage DC load circuit-break monitoring circuit | |
| CN217238178U (en) | Detection AC/DC source simply applied to sampling circuit | |
| CN217718669U (en) | Sensor chip output test hardware | |
| CN105914723B (en) | The switching device of residual current circuit breaker | |
| CN214335148U (en) | Novel circuit breaker mechanical characteristic measurement auxiliary device | |
| CN204269795U (en) | Power supply automatic detecting equipment | |
| CN208283510U (en) | A kind of circuit, device and multimeter measuring thyristor | |
| CN107543995A (en) | The detection method and device of Brush-Less DC motor control plate | |
| CN103983883B (en) | Low-voltage direct load cut-off observation circuit | |
| CN208520981U (en) | Hall sensor module detection device | |
| CN205898926U (en) | Silicon controlled rectifier detection circuitry in converter | |
| CN105865815B (en) | EMU brake tester endpoint detection system and method | |
| CN203732680U (en) | Three-phase bridge type inverter circuit maintenance test board |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |