CN2849738Y - Number quantity detecting circuitboard capable of warning connecting cable damage - Google Patents
Number quantity detecting circuitboard capable of warning connecting cable damage Download PDFInfo
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- CN2849738Y CN2849738Y CN 200520046307 CN200520046307U CN2849738Y CN 2849738 Y CN2849738 Y CN 2849738Y CN 200520046307 CN200520046307 CN 200520046307 CN 200520046307 U CN200520046307 U CN 200520046307U CN 2849738 Y CN2849738 Y CN 2849738Y
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Abstract
The utility model relates to a number quantity detecting circuit board capable of warning to the failure of a connected cable, which comprises a photoelectric isolation device OP1, two resistors R1, R2, a warning switch K and a section of cable AB, wherein one end of the photoelectric isolation device OP1 is connected with the resistor R1 and the end B of the cable AB, the other end of the photoelectric isolation device OP1 is connected with the resistor R2 and the warning switch K is connected with the end A of the cable AB. The utility model is characterized in that a voltage stabilizing diode ZW is arranged between the photoelectric isolation device OP1 and the end B of the cable AB, a photoelectric isolation device OP2 and the photoelectric isolation device OP1 are arranged in parallel connection, both ends of the photoelectric isolation devices OP are respectively provided with resistors R4, R5 and a resistor R3 and the warning switch K are connected in parallel. The utility model has the advantage of warning to the failure of the connected cable.
Description
Technical field
The utility model relate to a kind of can be to the digital quantity testing circuit plate of stube cable fault warning, the passage that can be used for the switching value checkout equipment detects, and belongs to digital quantity testing circuit technical field.
Background technology
We are often the detection of switch sensor as some digital quantity, such as door " opening " and " shutting ", " height " of flame detector detected temperatures and " low ", smoke detector detection " cigarette is arranged " and " smokelessly " etc., the detection of digital quantity can be according to the closed and disconnected of switch sensor switch, coming the logical value of detection of expression still is " 0 " for " 1 ", common switch sensor slowdown monitoring circuit can only detect opening of switch or closed two kinds of situations, be that the switching logic value is " 0 " (switch closure) or " 1 " (switch opens), we are the wherein a kind of logic value definition in " 0 " and " 1 " alert situation (for example " 0 ") often, and another kind of logic value definition is normal condition (for example " 1 ").
In general digital quantity alarm detection circuit board, can only detect logical value " 0 " and two kinds of situations of logical value " 1 ", the circuit that just can detect the outside connection is short circuit or open circuit, so the closure to switch still is the short circuit of stube cable, or the disconnection of switch still is opening circuit of stube cable, can't differentiate.
In general digital quantity alarm detection circuit board, detected situation was just the same when detected situation and switch stube cable disconnected when outside connected switch disconnected, and the situation when detected situation is also with switch closure during the short circuit of switch stube cable is just the same.As shown in Figure 1, be the digital quantity testing circuit that has photoelectricity to isolate, its principle is: when cable AB connects, if disconnecting K switch (logical one), we are defined as normal condition, this moment OPT lumination of light emitting diode, the triode conducting, Uout is output as 0; When K switch closure (logical zero), we are defined as alert situation, and this moment, the light emitting diode of OPT was not luminous, and triode ends, and Uout is output as VCC; Yet in case the stube cable AB of K disconnects, no matter K switch is to disconnect or closure, always the output of Uout is 0, the logic of performance is " 1 ", and promptly the testing result with the K switch disconnection is the same, so just opening circuit as normal condition cable.
Equally, the closure of switch (logical zero) is defined as normal condition, the disconnection of switch (logical one) is an alert situation just so, in this alarm logical definition, among Fig. 1, digital quantity alarm detection circuit can be used as normal condition to the switch stube cable to the short circuit of ground wire equally, and no matter at this moment the situation of switch is to disconnect or closure.
Summary of the invention
The purpose of this utility model be the invention a kind of can be to the digital quantity testing circuit plate of stube cable fault warning.
For realizing above purpose, the technical solution of the utility model provide a kind of can be to the digital quantity testing circuit plate of stube cable fault warning, comprise 1 photoelectric isolating device OP1,2 resistance device R1～R2, an alarm switch K and one section cable AB form, the end of photoelectric isolating device OP1 connects the B end of resistance R 1 and cable AB, the other end connects resistance R 2, the A end of alarm switch K stube cable AB, it is characterized in that, between the B of photoelectric isolating device OP1 and cable AB end, be provided with a voltage stabilizing diode ZW, it is in parallel with photoelectric isolating device OP1 to establish a photoelectric isolating device OP2 again, photoelectric isolating device OP two ends are respectively equipped with resistance R 4～R5, and resistance R 3 is in parallel with alarm switch K.
Described resistance R 3 is connected with alarm switch K.
The utility model is owing to adopted photoelectric isolating device in circuit board, can overcome the defective of general digital quantity alarm detection circuit, the stube cable fault of switch sensor is made the alarm reaction, and have good electrical isolation performance, the ability of very strong anti-electromagnetic interference (EMI) is arranged.
The utility model has the advantages that and to make alarm to the stube cable fault.
Description of drawings
Fig. 1 is former digital quantity testing circuit figure;
Fig. 2 be a kind of can be to the digital quantity testing circuit figure of stube cable fault warning;
Fig. 3 is the fundamental diagram of this circuit;
Fig. 4 is the digital quantity testing circuit figures of 2 one kinds of energy of embodiment to the stube cable fault warning;
Fig. 5 is the fundamental diagram of embodiment 2 circuit.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
Embodiment 1
As shown in Figure 2, for a kind of can be to the testing circuit chart board of stube cable fault warning, described can be to the digital quantity testing circuit plate of stube cable fault warning by 2 photoelectric isolating device OP, 5 resistance device R1～R5, an alarm switch K, a voltage stabilizing diode ZW and one section cable AB form, the end of photoelectric isolating device OP1 connects the B end of resistance R 1 and cable AB, the other end connects resistance R 2, the A end of alarm switch K stube cable AB, between the B of photoelectric isolating device OP1 and cable AB end, be provided with a voltage stabilizing diode ZW, it is in parallel with photoelectric isolating device OP1 to establish a photoelectric isolating device OP2 again, photoelectric isolating device OP two ends are respectively equipped with resistance R 4～R5, and resistance R 3 is in parallel with alarm switch K.
When the disconnection of switch (" 1 ") when being defined as normal condition, R3 is installed on the switch sensor and is connected with switch in parallel, as shown in Figure 3, is the fundamental diagram of this circuit:
When alarm switch K opens, the partial pressure value that the bleeder circuit of being made up of R1, R2, R3 is ordered at b:
Design R1, R2, R3 make Ub＜Uzw+Uop
Wherein: Uzw is the voltage stabilizing value of ZW, and Uop is the operating voltage of the light emitting diode of OP1
This moment, the light emitting diode of OP2 had working current to flow through, and the light emitting diode of OP1 does not have working current because ZW ends.So phototriode conducting of OP1, the output level Ua=0 of OP1, and the phototriode of OP2 ends, the output level Ub=Vcc of OP2, we are set as logical one to the output high level, and low level is set as logical zero, like this, when alarm switch disconnected, the expressed logic state of the level of OP1, OP2 was: L=01.
When switch closure, Ub=0, the light emitting diode of OP1, OP2 does not all have working current, and the phototriode of OP1, OP2 all is a cut-off state, and this moment, the expressed logic state of level of OP1, OP2 was: L=11.
When stube cable AB or ground wire CD open circuit, Ub=V1, because V1＞＞Uzw+Uop, the light emitting diode of OP1, OP2 all has working current to flow through, the phototriode of OP1, OP2 all is a conducting state, and this moment, the expressed logic state of level of OP1, OP2 was: L=00.
Therefore, in this circuit, we define L=01 is normal condition, L=00 and L=11 are alert situation, having only like this when switch disconnects is normal condition, and other situation is an alert situation all, promptly comprises: the open circuit of switch closure, stube cable, the short circuit of stube cable.
Embodiment 2
As shown in Figure 4, be the digital quantity testing circuit figure of 2 one kinds of energy of embodiment to the stube cable fault warning;
When the closure of switch (" 0 ") when being defined as normal condition, R3 is installed on the switch sensor and switch is connected in series, and other circuit structure is constant, as shown in Figure 5: for this circuit working principle as figure:
The same with aforesaid circuit structure, when alarm switch K opens, the partial pressure value that the bleeder circuit of being made up of R1, R2, R3 is ordered at b:
Because Ub＜Uzw+Uop
Equally, this moment, the light emitting diode of OP2 had working current to flow through, and the light emitting diode of OP1 does not have working current because ZW ends.So the phototriode conducting of OP1, the output level Ua=0 of OP1, and the phototriode of OP2 ends, and the output level Ub=Vcc of OP2, therefore, when alarm switch disconnected, the expressed logic state of the level of OP1, OP2 was: L=01.
When switch disconnects, Ub=V1, because V1＞＞Uzw+Uop, the light emitting diode of OP1, OP2 all has working current to flow through, and the phototriode of OP1, OP2 all is a conducting state, and this moment, the expressed logic state of level of OP1, OP2 was: L=00.
When external cable short circuit, cable ab is connected with ground wire cd, Ub=0, and the light emitting diode of OP1, OP2 does not all have working current, and the phototriode of OP1, OP2 all is a cut-off state, and this moment, the expressed logic state of level of OP1, OP2 was: L=11.
When stube cable AB or ground wire CD opened circuit, the expressed logic state of the level of OP1, OP2 is the same when disconnecting with switch to be: L=00.
Therefore, in this circuit, we define L=01 is normal condition, L=00 and L=11 are alert situation, having only like this when switch closure is normal condition, and other situation is an alert situation all, promptly comprises: switch disconnection, the open circuit of stube cable, the short circuit of stube cable.
Claims (2)
1. an energy is to the digital quantity testing circuit plate of stube cable fault warning, comprise 1 photoelectric isolating device OP1,2 resistance device R1～R2, an alarm switch K and one section cable AB form, the end of photoelectric isolating device OP1 connects the B end of resistance R 1 and cable AB, the other end connects resistance R 2, the A end of alarm switch K stube cable AB, it is characterized in that, between the B of photoelectric isolating device OP1 and cable AB end, be provided with a voltage stabilizing diode ZW, it is in parallel with photoelectric isolating device OP1 to establish a photoelectric isolating device OP2 again, photoelectric isolating device OP two ends are respectively equipped with resistance R 4～R5, and resistance R 3 is in parallel with alarm switch K.
2. according to claim 1ly a kind ofly can it is characterized in that described resistance R 3 is connected with alarm switch K to the digital quantity testing circuit plate of stube cable fault warning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520046307 CN2849738Y (en) | 2005-11-07 | 2005-11-07 | Number quantity detecting circuitboard capable of warning connecting cable damage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520046307 CN2849738Y (en) | 2005-11-07 | 2005-11-07 | Number quantity detecting circuitboard capable of warning connecting cable damage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2849738Y true CN2849738Y (en) | 2006-12-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520046307 Expired - Fee Related CN2849738Y (en) | 2005-11-07 | 2005-11-07 | Number quantity detecting circuitboard capable of warning connecting cable damage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2849738Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103760457A (en) * | 2014-01-27 | 2014-04-30 | 中铁建电气化局集团南方工程有限公司 | Cable checking circuit structure and common-line-free cable checking method |
-
2005
- 2005-11-07 CN CN 200520046307 patent/CN2849738Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103760457A (en) * | 2014-01-27 | 2014-04-30 | 中铁建电气化局集团南方工程有限公司 | Cable checking circuit structure and common-line-free cable checking method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061220 Termination date: 20091207 |