CN203595790U - Passive switch isolation detection apparatus - Google Patents
Passive switch isolation detection apparatus Download PDFInfo
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- CN203595790U CN203595790U CN201320824512.0U CN201320824512U CN203595790U CN 203595790 U CN203595790 U CN 203595790U CN 201320824512 U CN201320824512 U CN 201320824512U CN 203595790 U CN203595790 U CN 203595790U
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- filter capacitor
- pulse transformer
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- isolation
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- 238000001514 detection method Methods 0.000 title claims abstract description 25
- 238000002955 isolation Methods 0.000 title claims abstract description 23
- 239000003990 capacitor Substances 0.000 claims abstract description 28
- 238000012360 testing method Methods 0.000 claims description 23
- 238000005538 encapsulation Methods 0.000 claims description 3
- 230000003071 parasitic effect Effects 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 230000005684 electric field Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
A passive switch isolation detection apparatus comprises a to-be-detected switch S1, a secondary passive circuit, a primary detection circuit and an isolation pulse transformer T1. A primary side of the isolation pulse transformer T1 is connected with the primary detection circuit and a secondary side of the isolation pulse transformer T1 is connected with the secondary passive circuit. The secondary passive circuit includes a rectifier diode D1 and a filter capacitor C1. The rectifier diode D1 and the filter capacitor C1 are connected in series and then are connected with the primary side of the isolation pulse transformer T1 to form a passive loop. The to-be-detected S1 is connacted in parallel at two ends of the filter capacitor C1. The primary detection circuit includes a direct-current source VCC, a current-limiting resistor R1, a rectifier diode D2, a filter capacitor C2, a switching tube Q1, a high-frequency pulse signal source, and a discharge resistor R2. The passive switch isolation detection apparatus controls the connection and disconnection of the switching tube Q1 through the high-frequency pulse signal source, and thus realizes conversion between the electric energy and magnetic energy of the isolation pulse transformer T1, helps to reduce circuit size, does not need to add an auxiliary source needs on one side of the to-be-detected switch S1 to provide level signals, reduce work energy consumption, can determine the ON/OFF states of the to-be-detected switch by detecting the voltages at a detection end only, and in such a way, realizes passive isolation detection.
Description
Technical field
The utility model relates to switch detection technique, especially relevant with a kind of structure of passive switch isolation detection device.
Background technology
According to current switch isolation control program, all need send level signal from switch control side and respond to the inferior limit of isolation.Therefore must increase auxiliary source provides level signal, and then has increased volume and cost, so inevitably cause waste.
Therefore, need to be improved the passive switch isolation detection device that development structure is simple, volume is little, cost is low, low in energy consumption.
Summary of the invention
The utility model provides a kind of passive switch isolation detection device, to solve above-mentioned the deficiencies in the prior art.
In order to realize the purpose of this utility model, intend adopting following technology:
Passive switch isolation detection device, is characterized in that, comprises measured switch S1, secondary passive electric circuit, elementary testing circuit and Isolated Pulse Transformer T1, wherein:
The primary side of described Isolated Pulse Transformer T1 connects elementary testing circuit, and primary side connects secondary passive electric circuit;
Described secondary passive electric circuit comprises commutation diode D1 and filter capacitor C1, and commutation diode D1 is connected Isolated Pulse Transformer T1 primary side after connecting with filter capacitor C1 and forms parasitic loop;
Described measured switch S1 is connected in parallel on filter capacitor C1 two ends;
Described elementary testing circuit comprises DC source VCC, current-limiting resistance R1, commutation diode D2, filter capacitor C2, switching tube Q1, high-frequency pulse signal source and discharge resistance R2, described current-limiting resistance R1 one end connects DC source VCC, the other end connects Isolated Pulse Transformer T1 primary side, the drain electrode of described switching tube Q1 connects Isolated Pulse Transformer T1 primary side, source electrode meets GND, grid meets GND by a high-frequency pulse signal source, described commutation diode D2 is connected in parallel on switching tube Q1 two ends after connecting with filter capacitor C2, described discharge resistance R2 is connected in parallel on filter capacitor C2 two ends, in the middle of described commutation diode D2 and filter capacitor C2, be provided with test side.
Further, also connecting analog ground AGND of described secondary passive electric circuit.
Further, described elementary testing circuit is connected with voltage detection device by test side.
Further, the isolating transformer that described Isolated Pulse Transformer T1 is paster type encapsulation.
The advantage of technique scheme is: come conducting and the disconnection of gauge tap pipe by high-frequency pulse signal source, thereby electric energy and the magnetic energy of realizing Isolated Pulse Transformer transform, effectively reduce circuit volume, need to not increase auxiliary source in measured switch one side level signal is provided, thereby reduce work energy consumption, the voltage that only need to record test side can judge opening and closing of measured switch, has realized passive isolation detection.The utlity model has advantage simple in structure, stable, effective.
Accompanying drawing explanation
Fig. 1 shows the utility model structural representation.
Embodiment
As shown in Figure 1, passive switch isolation detection device, is characterized in that, comprises measured switch S1, secondary passive electric circuit, elementary testing circuit and Isolated Pulse Transformer T1, wherein:
The primary side of described Isolated Pulse Transformer T1 connects elementary testing circuit, and primary side connects secondary passive electric circuit;
Described secondary passive electric circuit comprises commutation diode D1 and filter capacitor C1, and commutation diode D1 is connected Isolated Pulse Transformer T1 primary side after connecting with filter capacitor C1 and forms parasitic loop;
Described measured switch S1 is connected in parallel on filter capacitor C1 two ends;
Described elementary testing circuit comprises DC source VCC, current-limiting resistance R1, commutation diode D2, filter capacitor C2, switching tube Q1, high-frequency pulse signal source and discharge resistance R2, described current-limiting resistance R1 one end connects DC source VCC, the other end connects Isolated Pulse Transformer T1 primary side, the drain electrode of described switching tube Q1 connects Isolated Pulse Transformer T1 primary side, source electrode meets GND, grid meets GND by a high-frequency pulse signal source, described commutation diode D2 is connected in parallel on switching tube Q1 two ends after connecting with filter capacitor C2, described discharge resistance R2 is connected in parallel on filter capacitor C2 two ends, in the middle of described commutation diode D2 and filter capacitor C2, be provided with test side.
Described secondary passive electric circuit is connecting analog ground AGND also.
Described elementary testing circuit is connected with voltage detection device by test side.
Described Isolated Pulse Transformer T1 is the isolating transformer of paster type encapsulation.
Working method of the present utility model:
(1) first send high-frequency pulse signal by high-frequency pulse signal source, in the time that switching tube Q1 receives high level signal, switching tube Q1 conducting, DC source VCC, current-limiting resistance R1, Isolated Pulse Transformer T1 primary side, GND form a turning circuit, the electric current of DC source VCC is Isolated Pulse Transformer T1 charging through current-limiting resistance R1 from Isolated Pulse Transformer T1 primary side, and the coil of Isolated Pulse Transformer T1 is converted into magnetic field energy by electric field energy and stores;
(2) in the time that switching tube Q1 receives low level signal, switching tube Q1 disconnects, and the turning circuit just now forming opens circuit, and magnetic field energy is converted into electric field energy by the coil of Isolated Pulse Transformer T1;
(3) now, if the S1 of opening the light to be measured is off-state, the secondary passive electric circuit of Isolated Pulse Transformer T1 primary side is just the current rectifying and wave filtering circuit of normal output, by commutation diode D2 rectification, filter capacitor C2 charging, Isolated Pulse Transformer T1 primary side is the current rectifying and wave filtering circuit of normal output of DC source VCC of having superposeed, by commutation diode D1 rectification, filter capacitor C1 charging, the voltage that test side obtains, for high level, is just off-state depending on measured switch S1; If the S1 of opening the light to be measured is closure state, the electric field energy of Isolated Pulse Transformer T1 primary side bleeds off through commutation diode D2, measured switch S1 short circuit, thereby the electric field energy of Isolated Pulse Transformer T1 primary side is dragged down, the voltage at filter capacitor C2 two ends bleeds off through discharge resistance R2, the voltage that test side obtains is low level, is closure state depending on measured switch S1.
The utility model carrys out conducting and the disconnection of gauge tap pipe by high-frequency pulse signal source, thereby electric energy and the magnetic energy of realizing Isolated Pulse Transformer transform, effectively reduce circuit volume, need to not increase auxiliary source in measured switch one side level signal is provided, thereby reduce work energy consumption, only need the voltage height of detection of primary testing circuit test side can judge opening and closing of measured switch, realized passive isolation detection.
Claims (4)
1. passive switch isolation detection device, is characterized in that, comprises measured switch S1, secondary passive electric circuit, elementary testing circuit and Isolated Pulse Transformer T1, wherein:
The primary side of described Isolated Pulse Transformer T1 connects elementary testing circuit, and primary side connects secondary passive electric circuit;
Described secondary passive electric circuit comprises commutation diode D1 and filter capacitor C1, and commutation diode D1 is connected Isolated Pulse Transformer T1 primary side after connecting with filter capacitor C1 and forms parasitic loop;
Described measured switch S1 is connected in parallel on filter capacitor C1 two ends;
Described elementary testing circuit comprises DC source VCC, current-limiting resistance R1, commutation diode D2, filter capacitor C2, switching tube Q1, high-frequency pulse signal source and discharge resistance R2, described current-limiting resistance R1 one end connects DC source VCC, the other end connects Isolated Pulse Transformer T1 primary side, the drain electrode of described switching tube Q1 connects Isolated Pulse Transformer T1 primary side, source electrode meets GND, grid meets GND by a high-frequency pulse signal source, described commutation diode D2 is connected in parallel on switching tube Q1 two ends after connecting with filter capacitor C2, described discharge resistance R2 is connected in parallel on filter capacitor C2 two ends, in the middle of described commutation diode D2 and filter capacitor C2, be provided with test side.
2. passive switch isolation detection device according to claim 1, is characterized in that, described secondary passive electric circuit is connecting analog ground AGND also.
3. passive switch isolation detection device according to claim 1, is characterized in that, described elementary testing circuit is connected with voltage detection device by test side.
4. passive switch isolation detection device according to claim 1, is characterized in that the isolating transformer that described Isolated Pulse Transformer T1 is paster type encapsulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320824512.0U CN203595790U (en) | 2013-12-16 | 2013-12-16 | Passive switch isolation detection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320824512.0U CN203595790U (en) | 2013-12-16 | 2013-12-16 | Passive switch isolation detection apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203595790U true CN203595790U (en) | 2014-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320824512.0U Expired - Lifetime CN203595790U (en) | 2013-12-16 | 2013-12-16 | Passive switch isolation detection apparatus |
Country Status (1)
| Country | Link |
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| CN (1) | CN203595790U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104297553A (en) * | 2014-10-28 | 2015-01-21 | 矽力杰半导体技术(杭州)有限公司 | Output voltage detection circuit, control circuit and switch-type converter |
| CN109633426A (en) * | 2018-12-07 | 2019-04-16 | 浙江特康电子科技有限公司 | Switch detection method |
| CN113933699A (en) * | 2021-10-18 | 2022-01-14 | 杭州优恩捷科技有限公司 | High-reliability passive switch on-off state detection circuit |
-
2013
- 2013-12-16 CN CN201320824512.0U patent/CN203595790U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104297553A (en) * | 2014-10-28 | 2015-01-21 | 矽力杰半导体技术(杭州)有限公司 | Output voltage detection circuit, control circuit and switch-type converter |
| CN109633426A (en) * | 2018-12-07 | 2019-04-16 | 浙江特康电子科技有限公司 | Switch detection method |
| CN109633426B (en) * | 2018-12-07 | 2021-06-08 | 浙江特康电子科技有限公司 | Switch detection method |
| CN113933699A (en) * | 2021-10-18 | 2022-01-14 | 杭州优恩捷科技有限公司 | High-reliability passive switch on-off state detection circuit |
| CN113933699B (en) * | 2021-10-18 | 2023-09-26 | 杭州优恩捷科技有限公司 | High-reliability passive switch on-off state detection circuit |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140514 |