CN201508188U - Two-wire three-state switch signal sensor - Google Patents
Two-wire three-state switch signal sensor Download PDFInfo
- Publication number
- CN201508188U CN201508188U CN2009201795320U CN200920179532U CN201508188U CN 201508188 U CN201508188 U CN 201508188U CN 2009201795320 U CN2009201795320 U CN 2009201795320U CN 200920179532 U CN200920179532 U CN 200920179532U CN 201508188 U CN201508188 U CN 201508188U
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- resistance
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- value
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Abstract
The utility model discloses a two-wire three-state switch signal sensor, which comprises a shell provided with an action switch inside, wherein a judgment resistor is also arranged in the shell, the action switch is connected with the judgment resistor in parallel, and lead wires at both ends of the judgment resistor form output lead wires. The utility model has simple structure, and output signals are led out from both ends of the judgment resistor; when the value of external physical quantity switches on the action switch, the output signal is 0 ohm; and when the value of the external physical quantity switches off the action switch, the output signal is the value of the judgment resistor. When an external circuit is disconnected, the signal at the receiving end of the sensor is an insulation resistance value so as to realize three-state signal output.
Description
Technical field
The utility model belongs to the improvement of switching signal sensor construction, particularly two line tri-state switch signal transducers.
Background technology
Conventional switch type sensor is represented the state of tested amount with the switching two states, but this sensor can't distinguish tested state and be " opening " and two kinds of working conditions of " circuit disconnection " fault, causes some unnecessary troubles to production.
The utility model content
The purpose of this utility model is to provide a kind of two line tri-state switch signal transducers, and this sensor can and be passed judgment on the state that resistance value is represented tested amount with short circuit, and with open circuit expression circuit open failure, further facilitates the user.
The purpose of this utility model is achieved in that a kind of two line tri-state switch signal transducers, the housing of step switch is housed in comprising, also be provided with one and pass judgment on resistance in housing, step switch and this judge resistance are connected in parallel, and the two ends lead-in wire of passing judgment on resistance constitutes output lead.
The utility model is simple in structure, and output signal is drawn by passing judgment on the resistance two ends, and when the value of external physical amount was connected step switch, the utility model signal of sensor was 0 ohm, and this constitutes a kind of state; When the value of external physical amount disconnected step switch, the utility model signal of sensor was for passing judgment on the value of resistance, and this constitutes second kind of state.The sensor receiving end signal is an insulating resistance value when outside line disconnects, and this has constituted the third state, thereby has realized ternary signal output.The utility model is easy to manufacture, and sensor can and be passed judgment on the state that resistance value is represented tested amount with short circuit, and with open circuit expression circuit open failure, further facilitates the user.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing.
Accompanying drawing is a structural representation of the present utility model.
Embodiment
A kind of two line tri-state switch signal transducers, as shown in drawings, the housing 3 of step switch 5 is housed in comprising, in housing 3, also is provided with one and passes judgment on resistance 4, step switch 5 is connected in parallel with this judge resistance 4, and the two ends lead-in wire 1,2 of passing judgment on resistance 4 constitutes output lead.
The resistance of passing judgment on resistance 4 is 100 ohm-900 kilohms.
Step switch 5 can be touched by sensitive element 6, and sensitive element 6 can be pressure switch, temperature switch or flow switch etc.Sensitive element 6 can be that mechanical connection also can be that on-mechanicals such as magnetic, light connect with being connected of step switch 5.
Output signal is drawn by passing judgment on resistance 4 two ends, and when sensitive element 6 was connected step switch 5, the utility model signal of sensor was 0 ohm, and this constitutes a kind of state; When sensitive element 6 disconnected step switch 5, the utility model signal of sensor was for passing judgment on the value of resistance 4, and this constitutes second kind of state.The sensor receiving end signal is an insulating resistance value when outside line disconnects, and this has constituted the third state, thereby has realized ternary signal output.
Claims (2)
1. line tri-state switch signal transducer, the housing (3) of step switch (5) is housed in comprising, it is characterized in that: in housing (3), also be provided with one and pass judgment on resistance (4), step switch (5) is connected in parallel with this judge resistance (4), and two ends lead-in wires (1), (2) of passing judgment on resistance (4) constitute output lead.
2. two line tri-state switch signal transducers according to claim 1 is characterized in that: the resistance of passing judgment on resistance (4) is 100 ohm-900 kilohms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201795320U CN201508188U (en) | 2009-09-22 | 2009-09-22 | Two-wire three-state switch signal sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201795320U CN201508188U (en) | 2009-09-22 | 2009-09-22 | Two-wire three-state switch signal sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201508188U true CN201508188U (en) | 2010-06-16 |
Family
ID=42469315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201795320U Expired - Fee Related CN201508188U (en) | 2009-09-22 | 2009-09-22 | Two-wire three-state switch signal sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201508188U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104316818A (en) * | 2014-10-29 | 2015-01-28 | 青岛鸿瑞电力工程咨询有限公司 | Circuit and method for detecting disconnection of cable online |
-
2009
- 2009-09-22 CN CN2009201795320U patent/CN201508188U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104316818A (en) * | 2014-10-29 | 2015-01-28 | 青岛鸿瑞电力工程咨询有限公司 | Circuit and method for detecting disconnection of cable online |
| CN104316818B (en) * | 2014-10-29 | 2017-06-16 | 青岛鸿瑞电力工程咨询有限公司 | Cable break online test 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: 20100616 Termination date: 20130922 |