CN207720117U - A kind of comparator circuit failure simulation device based on switching - Google Patents
A kind of comparator circuit failure simulation device based on switching Download PDFInfo
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- CN207720117U CN207720117U CN201820147909.3U CN201820147909U CN207720117U CN 207720117 U CN207720117 U CN 207720117U CN 201820147909 U CN201820147909 U CN 201820147909U CN 207720117 U CN207720117 U CN 207720117U
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Abstract
The utility model is related to a kind of comparator circuit failure simulation device based on switching, including：Analog circuit comprising a fault simulation module, for analog circuit element or functional circuit failure, short circuit, open circuit, precision variation, performance change phenomenon of the failure；One switching module is electrically connected with the fault simulation module, is used for switch failure type；One measurement terminal is electrically connected with the switching module, for detecting fault type；First power module, for powering for analog circuit；Functional circuit comprising comparator circuit and the second source for powering for comparator circuit, comparator circuit are electrically connected with switching module, and the utility model is easy to operate, easy to carry；Using switching functional circuit, using switching module handoff functionality circuit, eliminates and switch over the trouble for needing to work out control program using additional control device.
Description
Technical field
The utility model is related to electronics and power technique fields more particularly to a kind of comparator circuits based on switching
Failure simulation device.
Background technology
Comparator is across simplest in the device of digital circuit and analog circuit, while being using commonplace again
Integrated chip；The skilled use for grasping comparator has bigger Practical significance.And during study, lacking one kind can
It is easy to carry but be suitable for practice, test and comparison device failure device.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, obtain a kind of comparator based on switching
Circuit failure simulation device, can analog comparator circuit malfunction.
The utility model is achieved through the following technical solutions：
A kind of comparator circuit failure simulation device based on switching, including：
Analog circuit comprising a fault simulation module fails for analog circuit element or functional circuit, is short-circuit, disconnected
Road, precision variation, performance change phenomenon of the failure；One switching module is electrically connected with the fault simulation module, for cutting
Change fault type；One measurement terminal is electrically connected with the switching module, for detecting fault type；
First power module, for powering for analog circuit；
Functional circuit comprising comparator circuit and the second source for powering for comparator circuit, comparator circuit
It is electrically connected with switching module；
Bottom plate, the bottom plate are printing board PCB, and two linear power circuits are equipped on plate：+ 15V, -15V electricity
Source, power supply are based on linear voltage stabilization integrated chip 7815 and 7915, power for comparator circuit.
More preferably, the first power module is arranged in closed cell, and ac input end and low pressure are provided on closed cell
Ac output end.
More preferably, the first power module is additionally provided with Industrial Frequency Transformer, and for alternating current to be converted to direct current, closing is single
First outside is provided with DC output end.
More preferably, the fault simulation module includes the rectification circuit for simulating diode failure, by four diodes
D1, D2, D3 and D4 are formed, and corresponding D1A, D2A, D3A and D4A are to simulate the diode used when reversal connection failure, rectification circuit
The low-voltage alternating-current electric drive provided by the first power module, including two input AC test points of TP9, TP10, further include honest
Stream output point TP7 and negative direct current output point TP3, positive and negative direct current power supply are sent into next stage linear voltage stabilization link after capacitor filtering.
More preferably, the fault simulation module further includes the+15V circuits for simulating short trouble, including linear voltage stabilization
The input terminal of integrated circuit block U1, U1 circuit is electrically connected with rectification circuit output point TP7.
More preferably, the fault simulation module further includes the -15V circuits for simulating short trouble, including linear voltage stabilization
The input terminal of integrated circuit block U2, U2 circuit is electrically connected with rectification circuit output point TP3.
More preferably, LM311 comparator circuits are formed using two integrated package U3, U4 in the comparator circuit, circuit by
Resistance R3, R4 and R5 set the current potential threshold values of two comparators, and the threshold values of U4 is 5V, and the threshold values of U3 is 10V；In comparator circuit
It is provided with yellow and green two light emitting diodes, light emitting diode is connect with adjustable resistance respectively, and adjustable resistance is for adjusting
The current potential to be compared of two comparators, and voltage comparison result is shown by light emitting diode lamp.
More preferably, further include protection circuit, for protecting simulator.
Compared with prior art, the utility model has the beneficial effects that：It is easy to operate, it is easy to carry；Both can be used for
Usually practice, and athletic competition can be tested, using switching functional circuit, helps user quickly to recognize and understand comparator
Operation principle and various common malfunctions, can be not only used for learning training, and for examining and athletic competition, utilize switch
Switching module handoff functionality circuit eliminates and switches over the trouble for needing to work out control program using additional control device.
Description of the drawings
Fig. 1 is the functional module structure schematic diagram of the utility model；
Fig. 2 is the work flow diagram of the utility model；
Fig. 3 is the circuit diagram of first power module of the utility model；
Fig. 4 is the circuit diagram of the rectification circuit of the utility model；
Fig. 5 is the circuit diagram of+15V circuits of the utility model；
Fig. 6 is the circuit diagram of -15V circuits of the utility model；
Fig. 7 is the circuit diagram of the comparator circuit of the utility model.
Specific implementation mode
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
In the present embodiment, as shown in Figure 1 and Figure 2, the present apparatus be by power circuit, comparator circuit, fault simulation circuit,
Protect circuit, switch switching circuit and measurement terminal composition.
Illustrate the present embodiment from following components respectively：
For convenience of use, whole device uses AC power；AC power is powered after Industrial Frequency Transformer to device on plate；
This part is not examination part, therefore is individually encapsulated in a closed unit；
The bottom plate of whole device is a printed circuit board (PCB), and two linear power circuits are equipped on plate：+15V、-
15V power supplys, power supply are based on linear voltage stabilization integrated chip 7815 and 7915, power for comparator circuit.
Fault simulating function circuit is designed on present apparatus bottom plate, can analog circuit element or functional circuit failure, short circuit,
The phenomena of the failure such as open circuit, precision variation, performance change, fault point can be randomly divided into multiple failure groups by elaborately planned.
The present apparatus is also provided with protection circuit while simulated failure --- and protect lower circuit of nonserviceabling to be unlikely to
There is uncontrollable state；
One group of switching switch is installed, this corresponding one group of failure chosen of group switch on device bottom plate.User can be random
Position of the switch when this group switch being selected specifically to correspond to which group failure and malfunction and failure (i.e. failure is not present)；For examine and
When athletic competition, testee can not know the state for switching corresponding fault point and switch, and testee is avoided to memorize mechanically；
When fault point does not configure switching switch, the fault point is in failure mode (i.e. failure is not present), alternatively, event
Barrier point is switched configured with corresponding switching, but is switched and be in normal position, which is also at failure mode, and (i.e. failure is not deposited
)；
When all fault points are all in failure mode, circuit is in normal operating conditions；
The elaborately planned test point of the present apparatus, user understands the working condition of circuit by test point, and then judges electricity
Road normally whether；Config failure point on device bottom plate, is arranged the on off state of fault point, and makes a record, then, so that it may deliver
Testee uses.
System components circuit diagram is described as follows：
(1) 220V, 50HZ alternating current input power supplying and Industrial Frequency Transformer：
That is the first power module is arranged in closed cell, ac input end and low-voltage alternating-current is provided on closed cell
Output end；As shown in Figure 3.
(2) rectification circuit
In first power module, Industrial Frequency Transformer T2 has centre tap, exports one group of low-voltage alternating-current 18V to this rectified current
Road；
Rectification circuit such as Fig. 4 is made of four diodes D1, D2, D3 and D4, and corresponding D1A, D2A, D3A and D4A are mould
The diode used when quasi- reversal connection failure；
The functional circuit of four diodes is similar, and below by taking D1 as an example, the function of circuit is summarized with table 1；
TP9, TP10 are input AC test point, and TP7 (top, network is marked as V+) is exported, (the bottoms TP3 for positive direct-current
End, network is marked as V-) it is that negative DC power supply exports；Positive and negative direct current power supply is sent into next stage linear voltage stabilization ring after capacitor filtering
Section；
Table 1
| Serial number | S31 | S32 | S33 | S34 | Circuit state | Remarks |
| 1 | It is closed | It disconnects | It is closed | It disconnects | Diode is normal | D1 is work diode |
| 2 | Arbitrarily | It disconnects | It disconnects | It disconnects | Diode open-circuit | Simulating diode open fault |
| 3 | Arbitrarily | It disconnects | It disconnects | It is closed | Diode is reversed | Simulating diode reverse fault, D1A is instead of D1 |
| 4 | Arbitrarily | It is closed | It disconnects | It disconnects | Diode fails | Simulating diode failure of removal |
| 5 | It disconnects | It disconnects | It is closed | It disconnects | Diode behavior changes | Series connection R28 simulating diode performance changes |
Note 1：Other switch combinations do not use；
Note 2：Component parameters are only for reference in figure, practical material object of being subject to；
(3)+15V circuits
This circuit is with linear voltage stabilization integrated circuit U1 (7815) for core, and such as Fig. 5, the input of circuit is from rectification module
V+；Concrete operations mode and function such as table 2.
Table 2
| Serial number | S18 | S9 | S10 | Circuit state | Remarks |
| 1 | It is closed | Arbitrarily | Arbitrarily | Short circuit | Simulate short trouble |
| 2 | It disconnects | It disconnects | It is closed | Circuit is normal | |
| 3 | It disconnects | It is closed | It disconnects | Integrated package failure | Simulate integrated package failure |
Note 3：Other switch combinations do not use；
Note 4：Component parameters are only for reference in figure, practical material object of being subject to；
(4) -15V circuits
This element circuit and+15V element circuits are substantially similar, and such as Fig. 6, circuit inputs the V- from rectifying part, with collection
Blocking U2 (7915) is core, and circuit function is shown in Table 3, and eliminates open circuit fault simulation, increases short-circuit fault simulation.
Table 3
Note 5：Other switch combinations do not use；
Note 6：Component parameters are only for reference in figure, practical material object of being subject to；
(5) comparator circuit
This element circuit is the core of the present apparatus, such as Fig. 7, has used two pieces of integrated package U3, U4 (LM311) such as Fig. 5；Circuit
The current potential threshold values of two comparators is set by resistance R3, R4 and R5, the threshold values of U4 is 5V, and the threshold values of U3 is 10V；R1 and adjustable electric
Resistance R2 adjusts the current potential to be compared of two comparators together；The comparison result of two luminous tube instruction comparators；Concrete outcome
Such as table 4 (luminous tube LED status when comparator is normal), table 5 (comparator circuit function declaration).
Table 4
| Serial number | C | D | E | Green light | Amber light | Remarks |
| 1 | 10V | 5V | Less than 5V | It goes out | It is bright | |
| 2 | 10V | 5V | Higher than 5V, it is less than 10V | It goes out | It goes out | |
| 3 | 10V | 5V | Higher than 10V | It is bright | It goes out |
Table 5
| Serial number | S12 | S13 | S7 | S15 | S14 | S5 | S6 | S16 | Circuit state | Remarks |
| 1 | It disconnects | It is closed | It is closed | It is closed | It is closed | It is closed | It is closed | It is closed | Circuit is normal | |
| 2 | It is closed | It disconnects | It is closed | It is closed | It is closed | It is closed | It is closed | It is closed | R2 failures | |
| 3 | It disconnects | It is closed | It disconnects | It is closed | It is closed | It is closed | It is closed | It is closed | U3 input pull-downs | Simulate open fault |
| 4 | It disconnects | It is closed | It is closed | It disconnects | It is closed | It is closed | It is closed | It is closed | U4 input pull-downs | |
| 5 | It disconnects | It is closed | It is closed | It is closed | It disconnects | It is closed | It is closed | It is closed | U3 power failures | |
| 6 | It disconnects | It is closed | It is closed | It is closed | It is closed | It is closed | It disconnects | It is closed | U4 power failures | |
| 7 | It disconnects | It is closed | It is closed | It is closed | It is closed | It disconnects | It is closed | It is closed | U3 output open circuits | |
| 8 | It disconnects | It is closed | It is closed | It is closed | It is closed | It is closed | It is closed | It disconnects | U4 output open circuits |
Note 7：Other switch combinations do not use；
Note 8：Component parameters are only for reference in figure, practical material object of being subject to；
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
All any modification, equivalent and improvement etc., should be included in the utility model made by within the spirit and principle of utility model
Protection domain within.
Claims (8)
1. a kind of comparator circuit failure simulation device based on switching, which is characterized in that including：
Analog circuit comprising a fault simulation module, for analog circuit element or functional circuit failure, short circuit, open circuit, essence
Degree variation, performance change phenomenon of the failure；One switching module is electrically connected with the fault simulation module, for switching event
Hinder type；One measurement terminal is electrically connected with the switching module, for detecting fault type；
First power module, for powering for analog circuit；
Functional circuit comprising comparator circuit and the second source for powering for comparator circuit, comparator circuit with open
Close switching module electrical connection；
Bottom plate, the bottom plate are printing board PCB, and two linear power circuits are equipped on plate：+ 15V, -15V power supply, electricity
Source is based on linear voltage stabilization integrated chip 7815 and 7915, powers for comparator circuit.
2. a kind of comparator circuit failure simulation device based on switching as described in claim 1, which is characterized in that the
The setting of one power module is provided with ac input end and low-voltage alternating-current output end in closed cell, on closed cell.
3. a kind of comparator circuit failure simulation device based on switching as claimed in claim 2, which is characterized in that the
One power module is additionally provided with Industrial Frequency Transformer, and for alternating current to be converted to direct current, direct current is provided with outside closed cell
Output end.
4. a kind of comparator circuit failure simulation device based on switching as described in claim 1, which is characterized in that institute
It includes the rectification circuit for simulating diode failure to state fault simulation module, by four diodes (D1), (D2), (D3) and
(D4) it forms, corresponding (D1A), (D2A), (D3A) and (D4A) is to simulate the diode used when reversal connection failure, rectification circuit
The low-voltage alternating-current electric drive provided by the first power module, including (TP9), (TP10) two input AC test points further include
Positive direct-current output point (TP7) and negative direct current output point (TP3), it is linearly steady that positive and negative direct current power supply is sent into next stage after capacitor filtering
Pressure ring section.
5. a kind of comparator circuit failure simulation device based on switching as claimed in claim 4, which is characterized in that institute
It further includes+15V the circuits for simulating short trouble, including linear voltage stabilization integrated circuit block (U1) to state fault simulation module,
(U1) input terminal of circuit is electrically connected with rectification circuit output point (TP7).
6. a kind of comparator circuit failure simulation device based on switching as claimed in claim 4, which is characterized in that institute
It further includes -15V the circuits for simulating short trouble, including linear voltage stabilization integrated circuit block (U2) to state fault simulation module,
(U2) input terminal of circuit is electrically connected with rectification circuit output point (TP3).
7. a kind of comparator circuit failure simulation device based on switching as described in claim 1, which is characterized in that institute
It states in comparator circuit and forms LM311 comparator circuits, electric routing resistance (R3), (R4) using two integrated packages (U3), (U4)
(R5) sets the current potential threshold values of two comparators, and the threshold values of (U4) is 5V, and the threshold values of (U3) is 10V；It is set in comparator circuit
It is equipped with yellow and green two light emitting diodes, light emitting diode is connect with adjustable resistance respectively, and adjustable resistance is for adjusting two
The current potential to be compared of a comparator, and voltage comparison result is shown by light emitting diode lamp.
8. a kind of comparator circuit failure simulation device based on switching as described in claim 1, which is characterized in that also
Including protecting circuit, for protecting simulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820147909.3U CN207720117U (en) | 2018-01-29 | 2018-01-29 | A kind of comparator circuit failure simulation device based on switching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820147909.3U CN207720117U (en) | 2018-01-29 | 2018-01-29 | A kind of comparator circuit failure simulation device based on switching |
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| Publication Number | Publication Date |
|---|---|
| CN207720117U true CN207720117U (en) | 2018-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820147909.3U Active CN207720117U (en) | 2018-01-29 | 2018-01-29 | A kind of comparator circuit failure simulation device based on switching |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114137404A (en) * | 2021-11-23 | 2022-03-04 | 深圳供电局有限公司 | Maintenance method and system for voltage regulating switch of power transformer |
| CN114137354A (en) * | 2021-09-29 | 2022-03-04 | 汕头经济特区广澳电力发展公司 | Low-voltage distribution network electric leakage simulation system |
-
2018
- 2018-01-29 CN CN201820147909.3U patent/CN207720117U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114137354A (en) * | 2021-09-29 | 2022-03-04 | 汕头经济特区广澳电力发展公司 | Low-voltage distribution network electric leakage simulation system |
| CN114137404A (en) * | 2021-11-23 | 2022-03-04 | 深圳供电局有限公司 | Maintenance method and system for voltage regulating switch of power transformer |
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