CN102497188A - Multichannel switching apparatus - Google Patents
Multichannel switching apparatus Download PDFInfo
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- CN102497188A CN102497188A CN2011103775978A CN201110377597A CN102497188A CN 102497188 A CN102497188 A CN 102497188A CN 2011103775978 A CN2011103775978 A CN 2011103775978A CN 201110377597 A CN201110377597 A CN 201110377597A CN 102497188 A CN102497188 A CN 102497188A
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Abstract
The invention relates to a multichannel switching apparatus used for carrying out automatic switching by a digital universal meter to measure multipath voltage signals. The multichannel switching apparatus comprises at least two input ports, at least two relays, an output port and a cascade port. Besides, the apparatus is characterized in that: the at least two relays are in series connection; each of the input ports is connected with a normally open contact of one of the relay; the output port is connected with a public port of a first relay; the cascade port is connected with t a normally open contact of a last relay; and each of the relay is connected with a control signal. According to the multichannel switching apparatus provided in the invention, it can be ensured that all input channels can be isolated even when there is a fault on a control signal. A driving power is small; a current can be driven only by one path of relay. It is simple for module expansion; and random path number expansion can be realized.
Description
Technical field
The present invention relates to a kind of switching device shifter, refer in particular to a kind of multichannel switching device shifter that the plurality of voltages signal is measured in the digital multimeter automatic switchover that is used for.
Background technology
In the automated production of accumulator monitoring node module calibration, need a digital multimeter to automatically switch usually and measure the plurality of voltages signal, this just needs a kind of multichannel switching device shifter.And existing multichannel switching device shifter; Like application number is 2008101570967; Denomination of invention is: " the multichannel packet switching device that is used for the expanding basic data acquisition equipment port number "; Technical scheme such as Fig. 1, shown in Figure 2 of adopting, the shortcoming of technical scheme shown in Figure 1 is that driving power exists variation, varies.For 1 concerning 16 passages switch, minimumly can drive the connection that any relay is realized a paths, need drive the connection that 4 relays could be realized a paths the most at most.Technical scheme shown in Figure 2 is the analog switch that adopts, but not relay, shortcoming is to realize measuring the electrical isolation between the passage, and measurand is had certain requirement.And above two kinds of topological structures that scheme adopted can't be realized the design of any amount passage, and the module expansion control is complicated.
The invention provides a kind of multichannel switching device shifter, when the control signal fault, also can isolate between each input channel even guarantee; Driving power is little, as long as No. one relay drive current; The module expansion is simple, can realize any way expansion.
Summary of the invention
The problem that the present invention will solve provides a kind of multichannel switching device shifter, guarantees to isolate between each input channel, and driving power is little, and the module expansion is simple, can realize any way expansion.
To achieve these goals, the present invention has adopted following technical scheme: a kind of multichannel switching device shifter comprises:
At least two input ports, at least two relays, an output port; A cascade port; It is characterized in that: said at least two relays all are cascaded, and each input port is connected with the normally opened contact of a relay, and said output port is connected with the public port of first relay; Said cascade port is connected with the normally-closed contact of last relay, and said each relay is connected with a control signal.
Said relay is a DPDT type signal relay.
It is that the normally-closed contact of previous relay is connected with the public port of a back relay that said at least two relays all are cascaded.
Compared with prior art, beneficial effect of the present invention is:
A digital multimeter automaticallyes switch when measuring the plurality of voltages signal, can guarantee to isolate between each input channel, and driving power is little, and the module expansion is simple, can realize any way expansion.
Description of drawings
Fig. 1 is existing first kind of multichannel switching device shifter sketch map;
Fig. 2 is existing second kind of multichannel switching device shifter sketch map;
Fig. 3 is a multichannel switching device shifter sketch map of the present invention.
Embodiment
The embodiment of the invention provides a kind of multichannel switching device shifter, and is as shown in Figure 3:
Input port connects measured signal, and output port connects measuring instrument.Relay is selected " DPDT " type signal relay for use, and under the reset mode, relay public port c is connected with normally-closed contact a, and public port c is connected with normally opened contact b under the driving condition.
Measure a certain road signal if desired, as long as this road relay is driven through control signal, other relay hold reset gets final product.
Each relay is in reset mode under the default situations, and this output port only is connected with the measured signal of cascade port.This moment, then the switch of relay 4 was beaten the end to normally opened contact b if the measured signal of measurement input port 4 need drive relay 4 so, and this moment, the path of cascade port was broken off by relay 4, and output port only is connected with the measured signal of input port 4.
If control signal fault; Relay 2 is driven with relay 4 simultaneously, and then relay 2 switches are beaten the end to normally opened contact b, and relay 4 switches are also beaten to normally opened contact b and held; This moment, input port 4 was connected with the normally-closed contact a end of relay 2 through relay 3; And the public port c of relay 2 is connected with normally opened contact b end at this moment, and normally-closed contact a end is in vacant state, so input port 4 can not be connected with output port; And owing to the public port c of relay 2 is connected with normally opened contact b end; Then input port 2 is connected with output port; That is to say no matter how control signal changes; Output port only is connected with an input port, two interconnective situation of input channel can not occur, thereby guarantee equipment under test safety.
This characteristic makes module be specially adapted to the voltage measurement of multichannel different electrical power, when measuring multiple power supplies voltage, allows anything but to interconnect between any two-way supply voltage, if connect then cause power supply short circuit, burns out equipment or multichannel handover module easily.
When all relays all were in reset mode, output port only was connected with cascade port; Measure the signal of a certain input if desired, the relay that only needs to drive this road gets final product, and therefore no matter measures which passage, all need drive No. one relay at the most, and therefore, the global design driving power is little.
N can select arbitrary number in this programme, just can make the handover module of any multiple input path as required.Because the existence of cascade port allows a plurality of module series connection, easily realizes the expansion of measuring port.
The above; Be merely the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technical staff who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (3)
1. a multichannel switching device shifter comprises at least two input ports, at least two relays; An output port, a cascade port is characterized in that: said at least two relays all are cascaded; Said each input port is connected with the normally opened contact of a relay; Said output port is connected with the public port of first relay, and said cascade port is connected with the normally-closed contact of last relay, and said each relay is connected with a control signal.
2. a kind of multichannel switching device shifter according to claim 1 is characterized in that: said relay is a DPDT type signal relay.
3. a kind of multichannel switching device shifter according to claim 1 is characterized in that: it is that the normally-closed contact of previous relay is connected with the public port of a back relay that said at least two relays all are cascaded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103775978A CN102497188A (en) | 2011-11-24 | 2011-11-24 | Multichannel switching apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103775978A CN102497188A (en) | 2011-11-24 | 2011-11-24 | Multichannel switching apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102497188A true CN102497188A (en) | 2012-06-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103775978A Pending CN102497188A (en) | 2011-11-24 | 2011-11-24 | Multichannel switching apparatus |
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| CN (1) | CN102497188A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106324384A (en) * | 2016-08-03 | 2017-01-11 | 许继集团有限公司 | Multi-loop-circuit safety testing system and multipath switching device |
| CN108206121A (en) * | 2017-12-29 | 2018-06-26 | 哈尔滨工大测控技术有限公司 | 1 switching system of multiselect |
| CN109031999A (en) * | 2018-05-30 | 2018-12-18 | 浙江巨磁智能技术有限公司 | It can cascade channel switching system and its switching method |
| CN110389262A (en) * | 2018-04-17 | 2019-10-29 | 京元电子股份有限公司 | Measurement structure |
| CN110658366A (en) * | 2019-11-08 | 2020-01-07 | 上海辛格林纳新时达电机有限公司 | Channel switching circuit and test channel switching box |
| CN111007672A (en) * | 2019-12-05 | 2020-04-14 | 苏州精濑光电有限公司 | Macroscopic inspection machine for display panel and communication line switching device thereof |
| CN112206003A (en) * | 2019-07-11 | 2021-01-12 | 深圳市理邦精密仪器股份有限公司 | Multi-probe ultrasonic instrument and cascade structure of socket thereof |
| CN112206003B (en) * | 2019-07-11 | 2024-06-28 | 深圳市理邦精密仪器股份有限公司 | Multi-probe ultrasonic instrument and cascade structure of socket thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6069576A (en) * | 1998-04-02 | 2000-05-30 | The United States Of America As Represented By The Secretary Of The Navy | Synchro-to-digital converter |
| CN202034063U (en) * | 2011-03-17 | 2011-11-09 | 江苏核电有限公司 | Time-sharing multi-channel signal switching device |
-
2011
- 2011-11-24 CN CN2011103775978A patent/CN102497188A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6069576A (en) * | 1998-04-02 | 2000-05-30 | The United States Of America As Represented By The Secretary Of The Navy | Synchro-to-digital converter |
| CN202034063U (en) * | 2011-03-17 | 2011-11-09 | 江苏核电有限公司 | Time-sharing multi-channel signal switching device |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106324384A (en) * | 2016-08-03 | 2017-01-11 | 许继集团有限公司 | Multi-loop-circuit safety testing system and multipath switching device |
| CN108206121A (en) * | 2017-12-29 | 2018-06-26 | 哈尔滨工大测控技术有限公司 | 1 switching system of multiselect |
| CN108206121B (en) * | 2017-12-29 | 2019-08-23 | 哈尔滨工大测控技术有限公司 | 1 switching system of multiselect |
| CN110389262A (en) * | 2018-04-17 | 2019-10-29 | 京元电子股份有限公司 | Measurement structure |
| CN110389262B (en) * | 2018-04-17 | 2022-11-18 | 京元电子股份有限公司 | Measuring structure |
| CN109031999A (en) * | 2018-05-30 | 2018-12-18 | 浙江巨磁智能技术有限公司 | It can cascade channel switching system and its switching method |
| CN112206003A (en) * | 2019-07-11 | 2021-01-12 | 深圳市理邦精密仪器股份有限公司 | Multi-probe ultrasonic instrument and cascade structure of socket thereof |
| CN112206003B (en) * | 2019-07-11 | 2024-06-28 | 深圳市理邦精密仪器股份有限公司 | Multi-probe ultrasonic instrument and cascade structure of socket thereof |
| CN110658366A (en) * | 2019-11-08 | 2020-01-07 | 上海辛格林纳新时达电机有限公司 | Channel switching circuit and test channel switching box |
| CN111007672A (en) * | 2019-12-05 | 2020-04-14 | 苏州精濑光电有限公司 | Macroscopic inspection machine for display panel and communication line switching device thereof |
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Application publication date: 20120613 |