CN109387737A - Needle stand and plastic housing connection state detection system - Google Patents
Needle stand and plastic housing connection state detection system Download PDFInfo
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- CN109387737A CN109387737A CN201811457841.XA CN201811457841A CN109387737A CN 109387737 A CN109387737 A CN 109387737A CN 201811457841 A CN201811457841 A CN 201811457841A CN 109387737 A CN109387737 A CN 109387737A
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- 238000001514 detection method Methods 0.000 title claims abstract description 67
- 239000003990 capacitor Substances 0.000 claims description 14
- 230000005611 electricity Effects 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims 2
- 235000013399 edible fruits Nutrition 0.000 claims 1
- 238000012360 testing method Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
Classifications
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- 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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
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- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
This application involves a kind of needle stands and plastic housing connection state detection system, including needle stand, plastic housing, detection circuit and governor circuit, contact pin is provided on needle stand, the jack of corresponding number is provided in plastic housing, the two of them jack of plastic housing is shorted by harness, the contact pin connection detection circuit corresponding with two jacks of short circuit of needle stand, and detection circuit connects governor circuit, detection circuit is used to detect the connection status of needle stand and plastic housing, exports corresponding level signal to governor circuit according to connection status；Governor circuit is used for the level signal that receiving test circuit is sent, and obtains testing result according to level signal.Detection circuit exports low and high level signal according to the connection status of the needle stand and plastic housing that detect and is judged for governor circuit, governor circuit according to the low and high level signal received can accurate judgement needle stand and plastic housing either with or without successful connection, detection accuracy height.
Description
Technical field
This application involves Port detecting technical fields, more particularly to a kind of needle stand and plastic housing connection state detection system.
Background technique
The acquisition of connection and many signals between controller internal circuit board is all by harness, needle stand and plastic housing
Connection type carries out the transmission of signal.In controller installation or test process, if needle stand and plastic housing do not connect, control
Device directly works, it is possible that other operational modules are damaged because of operation irregularity.Such as when project is high-power electricity
When machine drives, motor driven normal work needs to acquire U, V, W three-phase current, the size of electric current be exactly pass through harness, needle stand and
The connection type of plastic housing is transmitted, when during the test, needle stand not successfully to slotting plastic housing, do not examine actually by governor circuit
Current value is measured, but electric current is continuously increased in IGBT module, leads to IGBT module overcurrent protection, if overcurrent protection is not in time,
IGBT will be burst.Traditional needle stand is connected with plastic housing can only judge connection status by artificial eye, erroneous judgement easily occur
Problem, detection accuracy are low.
Summary of the invention
Based on this, it is necessary to which connection status can only be judged by artificial eye by connecting for traditional needle stand with plastic housing, easily
Erroneous judgement, the low problem of detection accuracy provide a kind of needle stand that detection accuracy is high and plastic housing connection state detection system.
A kind of needle stand and plastic housing connection state detection system, including needle stand, plastic housing, detection circuit and governor circuit, it is described
It is provided with contact pin on needle stand, the jack of corresponding number is provided in the plastic housing, the two of them jack of the plastic housing passes through line
Beam is shorted, and the contact pin corresponding with described two jacks of short circuit of the needle stand connects the detection circuit, the detection circuit
The governor circuit is connected,
The detection circuit is used to detect the connection status of the needle stand and the plastic housing, is exported according to the connection status
Corresponding level signal is to the governor circuit；
The governor circuit is used to receive the level signal that the detection circuit is sent, and is examined according to the level signal
Survey result.
The two of them jack of plastic housing is shorted by above-mentioned needle stand and plastic housing connection state detection system by a harness,
The contact pin connection detection circuit of needle stand corresponding position, detection circuit export high according to the connection status of the needle stand and plastic housing detected
Low level signal is judged that governor circuit can accurately obtain needle stand according to the low and high level signal received for governor circuit
With plastic housing either with or without the testing result of successful connection, detection accuracy is high.
Detailed description of the invention
Fig. 1 is needle stand, plastic housing and wire harness schematic traditional in one embodiment；
Fig. 2 is needle stand rough schematic view in one embodiment；
Fig. 3 is plastic housing rough schematic view in one embodiment；
Fig. 4 is detection circuit structure diagram in one embodiment；
Fig. 5 is detection circuit structure diagram in another embodiment.
Specific embodiment
The application scenarios of the application specifically: as shown in Figure 1, being needle stand, plastic housing and wire harness schematic now used.Figure
A is needle stand in 1, and the pin below needle stand is connected with the pad on pcb board；B is plastic housing in Fig. 1；C is harness in figure one.Such as Fig. 2
It is shown, it is needle stand rough schematic view, the part of 8 elongate strips is the contact pin of needle stand, and the contact pin of the top with PCB (what is connect
Contact pin on needle stand is known as pin) it is expressed as D, the lowermost contact pin is expressed as E；As shown in figure 3, for plastic housing rough schematic view, 8
A elongate strip part is the jack that plastic housing is connect with needle stand, and upper end jack is expressed as F, and lower end jack is expressed as G, and endways is elongated
Item part is the connecting line that two jacks are shorted, and is expressed as H, further, is equally applicable to the knot that H is shorted plastic housing two sides jack
Structure becomes the occasion of internal structure short circuit.
In one embodiment, a kind of needle stand and plastic housing connection state detection system, including needle stand, plastic housing, detection circuit
And governor circuit, contact pin is provided on needle stand, the jack of corresponding number is provided in plastic housing, the two of them jack of plastic housing passes through
Harness is shorted, the contact pin connection detection circuit corresponding with two jacks of short circuit of needle stand, and detection circuit connects governor circuit, inspection
Slowdown monitoring circuit is used to detect the connection status of needle stand and plastic housing, exports corresponding level signal to governor circuit according to connection status；
Governor circuit is used for the level signal that receiving test circuit is sent, and obtains testing result according to level signal.
Specifically, needle stand is increased contact pin on the basis of original needle stand for the contact pin of detection；Plastic housing is to being applied to
The jack of detection is increased jack on the basis of original needle stand.In the present embodiment, it is inserted used in original needle stand and plastic housing
Increase by two needles on the basis of needle and jack number, two jacks, i.e. two needle of outermost and two jacks are detected for connection status, other needles
Use function it is unaffected.Assuming that the plastic housing of the needle stand and 6 holes of 6 needles was used to be attached originally, two needles of present increase,
Two jacks use the plastic housing (D, E are increased contact pin, and F, G are increased jack) of the needle stand and 8 jacks of 8 needles instead, further
Ground is not limited to be to increase contact pin in original needle stand outermost, can be intermediate any position, in the corresponding position of plastic housing
Increase jack, the use function of other needles is unaffected.
The two of them jack of plastic housing is shorted by above-mentioned needle stand and plastic housing connection state detection system by a harness,
The contact pin connection detection circuit of needle stand corresponding position, detection circuit export high according to the connection status of the needle stand and plastic housing detected
Low level signal is judged that governor circuit can accurately obtain needle stand according to the low and high level signal received for governor circuit
With plastic housing either with or without the testing result of successful connection, detection accuracy is high.
In one embodiment, as shown in figure 4, the contact pin corresponding with two jacks of short circuit of needle stand is respectively first to draw
Foot and second pin, detection circuit include voltage follower and voltage comparator, the non-inverting input terminal access of voltage follower the
One external power supply, the reverse inter-input-ing ending grounding of voltage follower, the reverse phase of the output end connection voltage comparator of voltage follower
Input terminal, the first pin of non-inverting input terminal access the second external power supply and needle stand of voltage comparator, the first pin of needle stand
The second pin of needle stand, the second pin ground connection of needle stand are shorted by the harness of plastic housing, the output end of voltage comparator connects master
Control circuit.
Specifically, voltage follower is to realize that output voltage follows a kind of electronic component of the variation of input voltage, at this
In embodiment, the reference voltage of 3.3V is provided, stable 3.3V voltage is exported by voltage follower, it when being detected, will
E pin (corresponding second pin) ground connection in Fig. 4, D pin (corresponding first pin) is drawn high to 5V, with voltage follower output
3.3V voltage is compared.Specific detection process are as follows: when needle stand is inserted into plastic housing, plug closes the switch (the i.e. short circuit of jack
The current potential of D pin is pulled low to ground by harness H), the voltage of the non-inverting input terminal of voltage comparator U31-A is less than inverting input terminal
Voltage exports low level；When needle stand is extracted in plastic housing, plug switch is disconnected, and the voltage of the non-inverting input terminal of voltage comparator is big
In the voltage of inverting input terminal, export high level, i.e., when needle stand and plastic housing successful connection, output low level signal to master control electricity
Road；When needle stand and plastic housing connection failure, output high level signal to governor circuit.
In one embodiment, as shown in figure 5, detection circuit further includes the first divider resistance and the second divider resistance,
The first external power supply, the homophase input of the another two end connection voltage follower of the first divider resistance are accessed in one end of one divider resistance
End, the second divider resistance one end connection voltage follower and the first divider resistance common end, the second divider resistance it is another
End ground connection.
Specifically, divider resistance refers to the resistance with the concatenated conductor of a certain circuit, in the case where total voltage is constant, at certain
One divider resistance of series connection on one circuit will play partial pressure, and a part of voltage will drop on divider resistance, make the part
The voltage at circuit both ends reduces.In the present embodiment, two the first divider resistance R8, the first divider resistance R7 electric resistance partial pressures,
The non-inverting input terminal (pin 5) of voltage follower U31-B generates 3.3V voltage, further, pin 6 and pin 5 of U31-B etc.
Current potential, 6 equipotential of pin 7 and pin of U31-B.
In one embodiment, detection circuit further includes the first filter capacitor, the first filter capacitor and the second divider resistance
It is in parallel.Specifically, the first filter capacitor C2 is used to filter out the clutter in input voltage, guarantees the steady of voltage follower input voltage
It is qualitative.
In one embodiment, detection circuit further includes the second filter capacitor, and the inverting input terminal of voltage follower passes through
Second filter capacitor ground connection.Specifically, the second filter capacitor C1 is used to filter out the clutter in output voltage, guarantees voltage follower
The stability of output voltage.
In one embodiment, detection circuit further includes the first current-limiting resistance, and the output end of voltage follower passes through first
The inverting input terminal of current-limiting resistance connection voltage comparator.Specifically, the resistance of suitable resistance value is chosen as the first current-limiting resistance
R3 burns out the concatenated voltage comparator U31-A of institute to the size of branch current where limiting to prevent electric current is excessive.
In one embodiment, detection circuit further includes third divider resistance and the 4th divider resistance, third divider resistance
One end access the second external power supply, the other end connects the non-inverting input terminal of voltage comparator, and one end of the 4th divider resistance connects
Connect the common end of voltage comparator and third divider resistance, the first pin of the other end connection needle stand of the 4th divider resistance.
Specifically, the resistance value phase of the resistance value of third divider resistance R4 and the first divider resistance R8 and the second divider resistance R7
Deng resistance value of the resistance value less than third divider resistance R4 of the 4th divider resistance R3.
In one embodiment, detection circuit further includes resistance, and one end of resistance connects the second pin of needle stand, resistance
Other end ground connection, the first pin of needle stand and the second pin of needle stand are shorted by harness.Specifically, resistance is used for needle stand
Second pin plays a protective role.
In one embodiment, detection circuit further includes the second current-limiting resistance, and the input terminal of voltage comparator passes through second
Current-limiting resistance connects governor circuit.Specifically, the resistance of suitable resistance value is chosen as the second current-limiting resistance R2, to where limiting
The size of branch current burns out the concatenated governor circuit of institute to prevent electric current is excessive.
In one embodiment, detection circuit further includes pull-up resistor, one end connection voltage comparator of pull-up resistor
The other end of output end, pull-up resistor accesses third external power supply.Specifically, pull-up resistor R1 is defeated for drawing high voltage comparator
Level signal out, while playing metering function.
In a detailed embodiment, as shown in figure 5, needle stand and plastic housing connection state detection system include needle stand, modeling
Shell, voltage follower U31-B, voltage comparator U31-A, the first divider resistance R8, the second divider resistance R7, the first filter capacitor
C2, the second filter capacitor C1, the first current-limiting resistance R3, third divider resistance R4, the 4th divider resistance R3, resistance R9, the second limit
The first external power supply is accessed in one end of leakage resistance R2 and pull-up resistor R1, the first divider resistance R8, and the first divider resistance R8's is another
Two ends connect voltage follower U31-B non-inverting input terminal, the second divider resistance R7 one end connection voltage follower U31-B and
The common end of first divider resistance R8, the other end ground connection of the second divider resistance R7, the partial pressure electricity of the first filter capacitor C2 and second
R7 parallel connection is hindered, the inverting input terminal of voltage follower U31-B is grounded by the second filter capacitor C1, voltage follower U31-B's
Output end passes through the inverting input terminal of the first current-limiting resistance R3 connection voltage comparator U31-A, one end of third divider resistance R4
The second external power supply is accessed, the other end connects the non-inverting input terminal of voltage comparator U31-A, and one end of the 4th divider resistance R3 connects
Connect the common end of voltage comparator U31-A and third divider resistance R4, the of the other end connection needle stand of the 4th divider resistance R3
The second pin E of one end connection needle stand of one pin D, resistance R9, other end ground connection, the second of the first pin of needle stand and needle stand
Pin is shorted by harness, and the input terminal of voltage comparator U31-A passes through the second current-limiting resistance R2 connection governor circuit, pull-up electricity
The one end for hindering R1 connects the common end of the second current-limiting resistance R2 and voltage comparator U31-A, and the other end accesses third external power supply,
The pin 8 of voltage comparator U31-A accesses the 4th external power supply, and pin 4 is grounded.
Plastic housing is used to be attached two jacks of detection by one by above-mentioned needle stand and plastic housing connection state detection system
Harness H is shorted, and when needle stand is inserted into plastic housing, plug closes the switch that (i.e. the current potential of D pin is pulled low to by the short circuit harness H of jack
Ground), current potential of the 3 pin current potentials less than 2 pins of voltage comparator U31-A, FO.CONNECT output low level；When plastic housing is extracted
When needle stand, plug switch is disconnected, i.e., when the first pin D and second pin E are not connected to, the 3 pin current potentials of voltage comparator U31-A
Greater than the current potential of 2 pins, FO.CONNECT exports high level, i.e., when needle stand and plastic housing successful connection, exports low level signal
To governor circuit；When needle stand and plastic housing connection failure, output high level signal to governor circuit.Governor circuit passes through output
Low and high level signal can accurate judgement needle stand and plastic housing connection status, detection accuracy is high, avoids the erroneous judgement of naked eyes detection
Disconnected problem, and then can guarantee the reliability of governor circuit control, controller Primary Component damage where reducing governor circuit
Risk, to reduce cost.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the concept of this application, various modifications and improvements can be made, these belong to the protection of the application
Range.Therefore, the scope of protection shall be subject to the appended claims for the application patent.
Claims (10)
1. a kind of needle stand and plastic housing connection state detection system, which is characterized in that including needle stand, plastic housing, detection circuit and master control
Circuit is provided with contact pin on the needle stand, and the jack of corresponding number is provided in the plastic housing, and the two of them of the plastic housing are inserted
Hole is shorted by harness, and the contact pin corresponding with described two jacks of short circuit of the needle stand connects the detection circuit, described
Detection circuit connects the governor circuit,
The detection circuit is used to detect the connection status of the needle stand and the plastic housing, is exported and is corresponded to according to the connection status
Level signal to the governor circuit；
The governor circuit is used to receive the level signal that the detection circuit is sent, and obtains detection knot according to the level signal
Fruit.
2. needle stand according to claim 1 and plastic housing connection state detection system, which is characterized in that the needle stand with it is short
The corresponding contact pin of described two jacks connect is respectively the first pin and second pin, and the detection circuit includes voltage follower
And voltage comparator, the non-inverting input terminal of the voltage follower access the first external power supply, the reverse phase of the voltage follower
Input end grounding, the output end of the voltage follower connect the inverting input terminal of the voltage comparator, and the voltage compares
First pin of non-inverting input terminal access the second external power supply and the needle stand of device, the first pin of the needle stand passes through described
The harness of plastic housing is shorted the second pin of the needle stand, the second pin ground connection of the needle stand, the output of the voltage comparator
End connects the governor circuit.
3. needle stand according to claim 2 and plastic housing connection state detection system, which is characterized in that further include the first partial pressure
First external power supply, the first partial pressure electricity are accessed in resistance and the second divider resistance, one end of first divider resistance
Another two end of resistance connects the non-inverting input terminal of the voltage follower, one end of second divider resistance connect the voltage with
With the common end of device and first divider resistance, the other end of second divider resistance is grounded.
4. needle stand according to claim 3 and plastic housing connection state detection system, which is characterized in that further include the first filtering
Capacitor, first filter capacitor and second divider resistance are in parallel.
5. needle stand according to claim 2 and plastic housing connection state detection system, which is characterized in that further include the second filtering
The inverting input terminal of capacitor, the voltage follower is grounded by second filter capacitor.
6. needle stand according to claim 2 and plastic housing connection state detection system, which is characterized in that further include the first current limliting
Resistance, the output end of the voltage follower connect the anti-phase input of the voltage comparator by first current-limiting resistance
End.
7. needle stand according to claim 2 and plastic housing connection state detection system, which is characterized in that further include third partial pressure
The second external power supply is accessed in resistance and the 4th divider resistance, one end of the third divider resistance, and the other end connects the voltage
One end of the non-inverting input terminal of comparator, the 4th divider resistance connects the voltage comparator and the third divider resistance
Common end, the other end of the 4th divider resistance connects the first pin of the needle stand.
8. needle stand according to claim 7 and plastic housing connection state detection system, which is characterized in that it further include resistance, institute
The one end for stating resistance connects the second pin of the needle stand, the other end ground connection of the resistance, the first pin of the needle stand and
The second pin of the needle stand is shorted by harness.
9. needle stand according to claim 2 and plastic housing connection state detection system, which is characterized in that further include the second current limliting
The input terminal of resistance, the voltage comparator connects the governor circuit by second current-limiting resistance.
10. needle stand according to claim 2 and plastic housing connection state detection system, which is characterized in that further include pull-up electricity
Resistance, one end of the pull-up resistor connect the output end of the voltage comparator, and the other end of the pull-up resistor accesses third
External power supply.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811457841.XA CN109387737B (en) | 2018-11-30 | 2018-11-30 | Needle seat and plastic shell connection state detection system |
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|---|---|---|---|
| CN201811457841.XA CN109387737B (en) | 2018-11-30 | 2018-11-30 | Needle seat and plastic shell connection state detection system |
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| CN109387737B CN109387737B (en) | 2024-05-24 |
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|---|---|---|---|---|
| CN110108975A (en) * | 2019-05-22 | 2019-08-09 | 广州高新兴机器人有限公司 | A kind of detection method and detection system for realizing the detection whether outer line cable of robot |
| CN111966033A (en) * | 2020-07-17 | 2020-11-20 | 苏州浪潮智能科技有限公司 | Detection system for connection state of high-density connector |
| CN113049987A (en) * | 2021-06-01 | 2021-06-29 | 北京博科测试系统股份有限公司 | Monitoring module for monitoring online state of sensor in real time |
| CN113346304A (en) * | 2021-06-11 | 2021-09-03 | 上海智租物联科技有限公司 | Prevent two-wheeled electric motor car and power battery's of striking sparks connecting wire |
| CN109387737B (en) * | 2018-11-30 | 2024-05-24 | 珠海格力电器股份有限公司 | Needle seat and plastic shell connection state detection system |
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