CN209402239U - Sample the test equipment of comparison circuit and high pressure monitoring and protecting device, power device - Google Patents
Sample the test equipment of comparison circuit and high pressure monitoring and protecting device, power device Download PDFInfo
- Publication number
- CN209402239U CN209402239U CN201920051699.2U CN201920051699U CN209402239U CN 209402239 U CN209402239 U CN 209402239U CN 201920051699 U CN201920051699 U CN 201920051699U CN 209402239 U CN209402239 U CN 209402239U
- Authority
- CN
- China
- Prior art keywords
- sampling
- circuit
- module
- input terminal
- comparison
- 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.)
- Active
Links
Abstract
The utility model discloses sampling comparison circuits, including sampling module, comparison module, control module, the sampling module includes the first sampling input terminal and the second sampling input terminal, the first sampling input terminal is used for the first sampled point of connecting test circuit, the second sampling input terminal is used for the second sampled point of connecting test circuit, the output end of the sampling module connects the input terminal of the comparison module, the output end of the comparison module connects the input terminal of the control module, and the control module output control signal is for controlling test circuit.The utility model real-time monitoring tests circuit, and in the case where exception occurs in test circuit, finds simultaneously to respond in very short time, protection test circuit and product.
Description
Technical field
The utility model relates to application of electronic technology field more particularly to a kind of sampling comparison circuit and using the circuit
High pressure monitoring and protecting device.
Background technique
With the development of power electronics technology, power device because its performance advantage, it is easy to control the advantages that widely answered
For in the Related products such as uninterruptible power supply, frequency converter.When the obstacle of overcurrent or short circuit occurs, flowed in power device
The electric current crossed eventually leads to and burns so that power device tube core temperature increases rapidly much larger than rated value.Therefore it needs to power
The performance of device, which carries out test, can put into application.
In the circuit of test, as shown in Figure 1, being tested in the prior art by DS4 equipment power device
Equivalent circuit, the switch performance of test breadboardin detection power device, by the pin that measuring head is acted on to power device
On.When TR7 and TR8 transistor, which is opened, to be worked normally, VDD remakes to use to inductance control circuit charging completes dynamic on DUT
Switch testing.But after TR7 or TR8 is short-circuit, the high voltage power supply VDD of test equipment will be in uncontrolled state, and generation is held
Continuous high-voltage great-current output, directly can persistently be output in tested product itself for voltage, and the pin of product is caused to burn even
Molding body is burst, the unsafe conditions such as electric spark occur for measuring head, while there is also certain electric shock risks by production maintenance personnel.For
This needs a kind of circuit and its monitoring and protecting device, in the case where testing circuit and exception occur, finds rapidly in very short time
And it responds, protection test circuit and product.
Utility model content
For overcome the deficiencies in the prior art, one of the purpose of this utility model is to provide a kind of input signal sampling electricity
Road, real-time monitoring test circuit simultaneously find and respond in time in abnormal cases.
The two of the purpose of this utility model are to provide a kind of high pressure monitoring and protecting device, can find in a very short period of time simultaneously
Staff is prompted to test the abnormal conditions that circuit occurs.
The three of the purpose of this utility model are to provide a kind of test equipment of power device, inside real-time watch device
Circuit is tested, the failure in very short time in discovery test equipment is simultaneously handled in time.
One of the purpose of this utility model adopts the following technical scheme that realization:
Comparison circuit, including sampling module, comparison module, control module are sampled, the sampling module includes the first sampling
Input terminal and the second sampling input terminal, the first sampling input terminal are used for the first sampled point of connecting test circuit, and described the
Two sampling input terminals are used for the second sampled point of connecting test circuit, and the output end of the sampling module connects the comparison module
Input terminal, the output end of the comparison module connects the input terminal of the control module, the control module output control letter
Number for control test circuit.
Further, the sampling module includes the first sampling resistor R1, the second sampling resistor R2 and zener diode
The first connecting pin connection of Z1, the first sampling resistor R1 the first sampling input terminal, the first sampling resistor R1's
Second connection end connects the first input end of the comparison module, and the second connection end of the first sampling resistor R1 is also connected with institute
State the cathode of the second sampling resistor R2 and zener diode Z1, anode and second sampling resistor of the zener diode Z1
The other end connects the comparison module；The second sampling input terminal connects the second input terminal of the comparison module.
Further, the comparison module includes switch transistor T 1, NAND gate U5, XOR gate U1；The of the XOR gate U1
One input terminal connects the second connection end of the first sampling resistor R1, described in the second input terminal connection of the XOR gate U1
Second sampling input terminal, the first input end of the NAND gate U5 connect the output end of the XOR gate U1 with the second input terminal,
The output end of the NAND gate U5 connects the grid of the switch transistor T 1, and the source electrode connection described second of the switch transistor T 1 is adopted
Sample resistance R2, drain electrode connect the control module.
Further, the control module includes relay, and 2 outputs level signals of switch transistor T control the relay
The opening and closing of device.
Further, the control module further includes reset button, and the reset button is set to the comparison module and institute
It states between relay.
It further, further include police instruction module, the police instruction module includes buzzer and indicator light, for mentioning
Existing abnormal conditions are shown.
Further, by
Determine the resistance value of the first sampling resistor R1 Yu the second sampling resistor R2.
Further, the switch transistor T 1 is the switching tube of high level conducting, low level cut-off.
The two of the purpose of this utility model adopt the following technical scheme that realization:
High pressure monitoring and protecting device is adopted including as above any sampling comparison circuit, the first of the sampling module
Sampling point is used to detect the control signal of the test circuit, and the second sampled point is for testing the high-voltage electricity of circuit described in real-time detection
Source state.
The three of the purpose of this utility model adopt the following technical scheme that realization:
The test equipment of power device, including charging control circuit, inductance control circuit and high pressure as described above prison
Protective device is controlled, the output end of the charging control circuit connects the input terminal of the high pressure monitoring and protecting device, the high pressure
The output end of monitoring and protecting device connects the inductance control circuit.
It further, further include the isolation circuit of multiple diodes in parallel, for preventing voltage reversal reflux from influencing test
Circuit output；The charging control circuit connects the inductance control circuit by the isolation circuit.
Compared with prior art, the utility model has the beneficial effects that:
(1) a kind of input signal sampling comparison circuit is provided, peace of test circuit during test product is improved
Quan Xing solves to be easy to appear the uncontrolled phenomenon of power supply during product test.When test circuit abnormal situation, that is, power
Voltage is uncontrolled, continues excessive or controls signal when the error occurs, and sampling module is delivered to ratio to the data transmission of test circuit
Compared with module, the abnormal conditions of test circuit are found by real time monitoring, and the power supply of cutting test circuit in a very short period of time, keep away
Exempt from the damage of test product, the safety of safeguard work personnel.
(2) a kind of high pressure monitoring and protecting device is provided, solution abnormal conditions occurs to Hi-pot test circuit in the prior art
The problem of lacking corresponding protective device.First sampled point of sampling module adopts test circuit with the second sampled point in real time
Sample, and judge to determine whether test circuit abnormal conditions occurs by comparing module.Control module is sent out if it found the abnormal situation
Warning information provides staff and cuts off test circuit power out.Present apparatus reaction speed is fast, easy to operate, is effectively protected
Test the measured device in circuit and the personal safety of staff.
(3) a kind of test equipment of power device is provided, the test equipment for solving power device in the prior art is being tested
There is the problem of lacking corresponding protection mechanism when abnormal conditions in circuit.By the high pressure monitoring and protecting device inside test equipment,
Real-time monitoring tests circuit, and the failure in very short time in discovery test equipment is simultaneously handled in time, and test circuit is effectively protected
In measured device and staff personal safety.
Detailed description of the invention
Fig. 1 is prior-art illustration；
Fig. 2 provides the system block diagram of embodiment by utility model；
Fig. 3 provides the sampling comparison circuit schematic diagram of embodiment one by the utility model；
Fig. 4 provides the schematic diagram of embodiment two by the utility model；
Fig. 5 provides the schematic diagram of embodiment three by the utility model.
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the utility model, it should be noted that
Under the premise of not colliding, it can be formed in any combination between various embodiments described below or between each technical characteristic new
Embodiment.
Embodiment one
As shown in Fig. 2, sampling comparison circuit provided by the utility model, applied to the test detected to power device
In equipment.If Fig. 1 test equipment includes that charging control circuit, inductance control circuit, first switch transistor TR7 and second are opened
Close transistor TR8.Wherein through photoelectrical coupler after the triggering of 5V signal, driving gate drivers control charging control circuit
First switch tube TR7 and the grid voltage of second switch TR8 are switched.And inductance control circuit is in first switch tube
With after second switch TR8 switch control, induction charging is exported to test product TR7.
As shown in Figure 2,3, comparison circuit, including sampling module, ratio are sampled for input signal provided by the utility model
Compared with module, control module, the sampling module includes the first sampling input terminal and the second sampling input terminal, and first sampling is defeated
Enter the first sampled point that end is used for connecting test circuit, second sampling of the second sampling input terminal for connecting test circuit
Point, the output end of the sampling module connect the input terminal of the comparison module, described in the output end connection of the comparison module
The input terminal of control module, the control module output control signal is for controlling test circuit.Specific sampled point such as Fig. 5 institute
Show, A is the first sampled point, and B is the second sampled point.The voltage sampling signal of B point is synchronous adjoint when controlling with the triggering of A point,
Therefore the sampled signal of sampling module can keep synchronous substantially.
Sampling comparison circuit provided by the embodiment of the utility model samples the original test of test circuit by sampling module
The test signal of trigger signal and output into inductance control circuit.Test circuit under normal circumstances, first sampling input terminal and
Second sampling input terminal can collect the test signal of test circuit simultaneously.When the only second sampling input terminal can sample test
When signal, show that the switching transistor for testing circuit breaks down, test circuit has short circuit, and tested device has by high pressure combustion
The risk ruined.Sampling comparison circuit provided by the utility model outputs control signals to test circuit by control module, control
The circuit connection between circuit disconnection and tested device is tested, is not burned out to play the tested device of protection, keeps away simultaneously
Exempt from tester by high-voltage electric shock.This sampling comparison circuit only has sampling module and comparison module monitoring in real time under normal circumstances
Whether the test signal for testing circuit is normal, and only when testing circuit failure, control module is just exported in comparison module
Control signal function under, control test circuit disconnects and the connection of tested device.
Sampling comparison circuit provided by the utility model improves safety of test circuit during test product,
It solves to be easy to appear the uncontrolled phenomenon of power supply during product test.When test circuit abnormal situation, i.e. supply voltage
When the error occurs, sampling module is delivered to the data transmission of test circuit compares mould to uncontrolled, lasting excessive or control signal
Block, by real time monitoring find test circuit abnormal conditions, and in a very short period of time cutting test circuit power supply, avoid by
Survey the damage of product, the safety of safeguard work personnel.
Specifically, the sampling module includes the first sampling resistor R1, the second sampling resistor R2 and zener diode Z1,
The first connecting pin connection of the first sampling resistor R1 the first sampling input terminal, the second of the first sampling resistor R1
Connecting pin connects the first input end of the comparison module, and the second connection end of the first sampling resistor R1 is also connected with described
The anode of the cathode of two sampling resistor R2 and zener diode Z1, the zener diode Z1 is another with second sampling resistor
End connects the comparison module；The second sampling input terminal connects the second input terminal of the comparison module.
Comparison module uses logical comparison device, specially XOR gate U1, chip model 74LS86N, NAND gate U5, type
It number is SN74LS00N, the first input end of XOR gate U1 connects the first sampled point, the second input terminal connects the second sampled point, with
The first input end of NOT gate U5 connect the output end of XOR gate U1, the output end connection switch of NAND gate U5 with the second input terminal
The grid of pipe T1, the source electrode of switch transistor T 1 connect the second sampling resistor R2, drain electrode link control module.
When the first sampled point is identical as the signal level of the second sampled point, XOR gate U1 output is low level, NAND gate
U5 exports high level, and switch transistor T 1 is connected at this time, and test circuit is in normal condition.When there are abnormal conditions in test circuit,
First sampled point is different from the signal level of the second sampled point, and XOR gate U1 exports high level, and NAND gate U5 exports low level, this
When switch transistor T 1 end.
In the present embodiment, sampled point is set as two.When need the signal that monitors only one when, another sampled point
It can be needed directly to be set as 0V, i.e. low level or 5V, high level according to circuit.
In this circuit, powered using 5V direct current power source voltage.The current signal of test product is turned by sampling resistor
Turn to voltage signal.The resistance value of sampling resistor can be adjusted according to specific test product and test circuit.In general,
The use scope of supply voltage is in 30V-170V, and the significant level of the logical comparison device generally used are as follows: 1.5V-5V is height
Level, 0V-0.8V are low level.When the voltage of detected signal is greater than 5V, to ensure that the sampled voltage of 30V or more is high electricity
It is flat, according to
Ratio, so that it is determined that the resistance value of the first sampling resistor R1 and the second sampling resistor R2.
Preferably to realize that control module includes relay, 2 output level of switch transistor T to the control of test circuit
Signal controls the opening and closing of the relay.Specially when there are abnormal conditions, switch transistor T 1 end, by with it is non-
Door U2 then exports high level, and switch transistor T 2 is connected, then relay must conduct, and opens the switch of test circuit, and test circuit stops
Only work.After failure is discharged in staff, press reset button, reset entire input signal sample circuit, test circuit after
Continuous work.In the case where not needing high-cost driving optocoupler or building complicated analog circuit, the utility model
It is timely protected by the way that the realization of devices at full hardware logic circuit is sensitive.
The utility model further includes police instruction module, specially buzzer and warning light, for prompting abnormal shape occur
State.When there is abnormal signal to be delivered to control module, warning light is always on, alarm at buzzer hair, and staff is reminded to carry out
It checks and repairs.
Embodiment two
As shown in figure 4, the utility model additionally provides a kind of high pressure monitoring and protecting device, including above-mentioned sampling is more electric
Road, the first sampled point of sampling module are used to detect the control signal of the test circuit, and the second sampled point is used for real-time detection
The high voltage power supply state of the test circuit, for specific sampled point as shown in figure 5, A is the first sampled point, B is the second sampled point.B
The voltage sampling signal of point is synchronous adjoint when controlling with the triggering of A point, therefore the sampled signal of sampling module can protect substantially
Hold synchronization.
This high pressure monitoring and protecting device detection circuit for access, the first sampled signal and the second sampled signal are compared, if
It is to detect abnormal signal, then the relay of control module obtains electric, opens the switch of test circuit, the power supply of cutting test circuit
Input triggers police instruction module, staff is notified to overhaul.Until staff presses reset button, sound all clear,
Test circuit is reworked.It solves to lack corresponding protective device when the prior art abnormal conditions occurs to Hi-pot test circuit
Problem.And present apparatus reaction speed is fast, and it is easy to operate, it being capable of measured device in reliably protecting test circuit and staff
Personal safety.
Embodiment three
As shown in figure 5, the utility model also provides a kind of test equipment of power device, including charging control circuit, electricity
Feel control circuit and high pressure monitoring and protecting device, the input of the output end connection high pressure monitoring and protecting device of charging control circuit
The output end at end, high pressure monitoring and protecting device connects inductance control circuit.
To increase isolation circuit between the second sampled point and inductance control circuit to test circuit further protection,
For multiple diodes in parallel, circuit output is influenced for preventing voltage reversal from flowing back.
The test equipment of this power device compares the first sampled signal and the second sampled signal, if detecting exception
Signal, then the relay of control module obtains electric, opens the switch of test circuit, the power input of cutting test circuit, triggering report
Alert indicating module, notifies staff to overhaul.Until staff presses reset button, sounds all clear, tests circuit weight
New work.The test equipment for solving power device in the prior art lacks corresponding protection machine when testing circuit and abnormal conditions occur
The problem of processed.And this equipment reaction speed is fast, it is easy to operate, can reliably protecting test circuit in measured device and work people
The personal safety of member.
Above embodiment is only preferred embodiments of the present invention, cannot be protected with this to limit the utility model
Range, the variation of any unsubstantiality that those skilled in the art is done on the basis of the utility model and replacement belong to
In the utility model range claimed.
Claims (11)
1. sampling comparison circuit, which is characterized in that including sampling module, comparison module, control module, the sampling module includes
First sampling input terminal and the second sampling input terminal, first sampling of the first sampling input terminal for connecting test circuit
Point, the second sampling input terminal are used for the second sampled point of connecting test circuit, and the output end of the sampling module connects institute
The input terminal of comparison module is stated, the output end of the comparison module connects the input terminal of the control module, the control module
Output control signal is for controlling test circuit.
2. sampling comparison circuit as described in claim 1, which is characterized in that the sampling module includes the first sampling resistor
The first connecting pin of R1, the second sampling resistor R2 and zener diode Z1, the first sampling resistor R1 connection described first
Input terminal is sampled, the second connection end of the first sampling resistor R1 connects the first input end of the comparison module, and described the
The second connection end of one sampling resistor R1 is also connected with the cathode of the second sampling resistor R2 and zener diode Z1, the pressure stabilizing
The anode of diode Z1 connect the comparison module with the second sampling resistor other end；The second sampling input terminal connection
Second input terminal of the comparison module.
3. as claimed in claim 2 sampling comparison circuit, which is characterized in that the comparison module include switch transistor T 1, with it is non-
Door U5, XOR gate U1；The first input end of the XOR gate U1 connects the second connection end of the first sampling resistor R1, described
The second input terminal connection of XOR gate U1 the second sampling input terminal, the first input end of the NAND gate U5 and the second input
End connects the output end of the XOR gate U1, and the output end of the NAND gate U5 connects the grid of the switch transistor T 1, described to open
The source electrode for closing pipe T1 connects the second sampling resistor R2, drain electrode connects the control module.
4. sampling comparison circuit as claimed in claim 3, which is characterized in that the control module includes relay, described to open
Close the opening and closing that pipe T2 outputs level signals control the relay.
5. sampling comparison circuit as claimed in claim 4, which is characterized in that the control module further includes reset button, institute
Reset button is stated to be set between the comparison module and the relay.
6. sampling comparison circuit as claimed in claim 4, which is characterized in that further include police instruction module, the alarm refers to
Show that module includes buzzer and indicator light, for prompting abnormal conditions occur.
7. sampling comparison circuit as claimed in claim 6, which is characterized in that by
Determine the resistance value of the first sampling resistor R1 Yu the second sampling resistor R2.
8. sampling comparison circuit as claimed in claim 7, which is characterized in that the switch transistor T 1 is high level conducting, low electricity
Truncate switching tube only.
9. high pressure monitoring and protecting device, which is characterized in that described including any sampling comparison circuit of claim 1-8
First sampled point of sampling module is used to detect the control signal of the test circuit, and the second sampled point is for described in real-time detection
Test the high voltage power supply state of circuit.
10. the test equipment of power device, which is characterized in that including charging control circuit, inductance control circuit and such as right
It is required that high pressure monitoring and protecting device described in 9, the output end of the charging control circuit connects the high pressure monitoring and protecting device
Input terminal, the output end of the high pressure monitoring and protecting device connects the inductance control circuit.
11. the test equipment of power device as claimed in claim 10, which is characterized in that further include multiple diodes in parallel
Isolation circuit, for preventing voltage reversal reflux from influencing test circuit output；The isolation circuit is set to second sampled point
Between the inductance control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920051699.2U CN209402239U (en) | 2019-01-11 | 2019-01-11 | Sample the test equipment of comparison circuit and high pressure monitoring and protecting device, power device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920051699.2U CN209402239U (en) | 2019-01-11 | 2019-01-11 | Sample the test equipment of comparison circuit and high pressure monitoring and protecting device, power device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209402239U true CN209402239U (en) | 2019-09-17 |
Family
ID=67898173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920051699.2U Active CN209402239U (en) | 2019-01-11 | 2019-01-11 | Sample the test equipment of comparison circuit and high pressure monitoring and protecting device, power device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209402239U (en) |
-
2019
- 2019-01-11 CN CN201920051699.2U patent/CN209402239U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101853554B (en) | Fireproofing pre-warning monitoring method for unmanned base station and system thereof | |
| CN102709901B (en) | Current transformer over-voltage protection method and device | |
| CN201134662Y (en) | Leakage detecting and protecting device | |
| CN206442105U (en) | Current transformer monitoring and protecting system | |
| CN201821255U (en) | Controllable silicon power regulator | |
| CN110474402A (en) | Charge current foldback circuit and method | |
| CN209402239U (en) | Sample the test equipment of comparison circuit and high pressure monitoring and protecting device, power device | |
| CN109167342A (en) | Lightning protection monitoring device | |
| CN209402491U (en) | The test equipment of delay screening circuit and high pressure monitoring and protecting device, power device | |
| CN202260375U (en) | Circuit detection protecting device | |
| CN209311635U (en) | A kind of detection circuit that high voltage negative relay is adhered | |
| CN109546627B (en) | Safety charging protection method and charging protection circuit for lithium battery pack | |
| CN209593100U (en) | A kind of remote controlled Intelligent reclosing switching device | |
| CN216086135U (en) | Online comprehensive intelligent circuit breaker | |
| CN109580211A (en) | A kind of mechanical characteristic test system of high-voltage circuitbreaker | |
| CN212659491U (en) | Poor automatic checkout device of wiring and circuit breaker thereof | |
| CN204102748U (en) | A kind of isolating switch control cubicle with warning | |
| CN205123231U (en) | High -temperature early warning surge protector | |
| CN208369206U (en) | A kind of arc light protective device with TEV detection | |
| CN206557270U (en) | A kind of primary current supervising device | |
| CN209311610U (en) | A kind of metal-back electric equipment products electric leakage alarm device with self-checking function | |
| CN211819019U (en) | Novel electricity laboratory destatic safety inspection door equipment | |
| CN208188240U (en) | Forceful electric power short circuit detector | |
| CN109856435A (en) | The high pressure monitoring and protecting device of state latching circuit and the application circuit | |
| CN206038868U (en) | Battery status indicating device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |