CN103176034A - Data acquisition device with hot plug protection function and channel card thereof - Google Patents
Data acquisition device with hot plug protection function and channel card thereof Download PDFInfo
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- CN103176034A CN103176034A CN2011104312403A CN201110431240A CN103176034A CN 103176034 A CN103176034 A CN 103176034A CN 2011104312403 A CN2011104312403 A CN 2011104312403A CN 201110431240 A CN201110431240 A CN 201110431240A CN 103176034 A CN103176034 A CN 103176034A
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Abstract
An embodiment of the invention provides a data acquisition device with a hot plug protection function and a channel card thereof. The data acquisition device comprises at least one current measuring channel. Each current measuring channel comprises two input lines. Each input line comprises a current measuring terminal and an output terminal. The channel card is provided with a protection circuit. The protection circuit is automatically connected to achieve the closing state of the current measuring channel of the channel card to protect a device to be measured when the channel card is in power failure. When the channel card is used for measuring current signals and unforeseen circumstance like hot plug or power failure happens, the protection circuit is connected automatically to achieve the closing state of the current measuring channel, so that damage of device elements to be measured or circuit modules to be measured and severe production results caused by open circuit of the current measuring channel can be avoided.
Description
Technical field
The present invention relates to the measurement field tests of electric signal, relate to particularly a kind of data collector and channel card thereof with hot plug defencive function.
Background technology
Measure and technical field of measurement and test in, so-called data collector refers to a kind of device of automatic Information Monitoring from sensor and other measured target.It can realize the collection of multi-signal, by data collector is connected or directly is connected with measured signal with sensor, the sensitive element of outside, can gather and measure various measured signals such as d. c. voltage signal, ac voltage signal, dc current signal, ac current signal, frequency signal, temperature signal, pressure signal, pressure signal.
Multi-channel data acquisition unit refers to be integrated with the data collector of multiple measurement function, and it has a plurality of passages, and each passage can access different measured signals.As shown in Figure 1, be a kind of structural representation of multi-channel data acquisition unit, described multi-channel data acquisition unit 100 comprises three parts: main control unit 101, module card 102 and backboard unit 103.
Main control unit 101 is unit of controlling whole system work, and it is connected with module card 102 by backboard unit 103.Main control unit 101 is completed switching and the data acquisition operation of input signal (being measured signal) by coordinating a plurality of module card 102.
Module card 102 generally includes 1,022 two kinds, channel card 1021 and multimeter card, in addition, also comprises the module card of other type, and they can be controlled separately, do not need or can not unite use with multimeter card 1022.Measured signal accesses in each passage in channel card 1021 by external cabling, and main control unit 101 is introduced into the measured signal that accesses on respective channel in multimeter card 1022 by sending control commands to channel card 1021.Multimeter card 1022 claims again measurement card, perhaps data collecting card, connect the measured signal of coming in by various types of channel card for measurement, main control unit 101 is by sending control command to multimeter card 1022, control the measured signal that multimeter card 1022 receives from different passages, carry out data acquisition.
Backboard unit 103 possesses a plurality of slots is arranged, be used for inserting different module card 102, it works " bridge " effect that connects main control unit 101 and module card 102, and the emulation bus by on backboard unit 103 can input to the measured signal in each passage in multimeter card 1022; By the communication bus on backboard unit 103, main control unit 101 can send control commands and receive the measured signal that multimeter card 1022 is measured to channel card 1021 and multimeter card 1022.In addition, the power supply of main control unit 101 and modules card 102 is also to provide by the power circuit on backboard unit 103.
When carrying out data acquisition, main control unit 101 sends control command to channel card 1021 at first by communication bus; Channel card 1021 is connected a corresponding passage according to control command, by this passage, measured signal is input on emulation bus; Then main control unit 101 by communication bus, sends control command to multimeter card 1022, and multimeter card 1022 gathers the measured signal on emulation bus according to this control command; After collection is completed, multimeter card 1022 returns to main control unit 101 by communication bus with data, at this moment, has completed the data acquisition of measured signal on described passage.
Measured signal on each passage can be different, and the user can be configured the passage of multi-channel data acquisition unit 100 inside, sets the matching relationship of each measured signal and passage.Owing to being multi-channel data acquisition, therefore, main control unit 101 need to be controlled the order of measured signal access multimeter card 1022 in each passage, and multimeter card 1022 carries out the process of data acquisition successively to the measured signal on each passage, be namely a kind of scanning process to passage.Multi-channel data acquisition measurement mechanism 100 is widely used in the fields such as communication, medical treatment, industrial automation, and the module card of difference in functionality has satisfied the measuring system of different application occasion and built demand, and configuration mode is also convenient for users to use flexibly.
Above-mentioned module cassette data acquisition measuring device is widely used in the fields such as communication, medical treatment, industrial automation, and the module card of difference in functionality has satisfied the measuring system of different application occasion and built demand, and configuration mode is also convenient for users to use flexibly.But; the inventor finds in realizing process of the present invention, and existing modular data collector is not generally supported hot plug, occurs accident power-off or module hot plug situation when carrying out current measurement; owing to can not effectively protecting measured device, easily cause the damage of measured device.
Summary of the invention
The object of the invention is to; the invention provides a kind of data collector and channel card thereof with hot plug defencive function; be used at bus-structured data collector; channel card is when measuring current signal; when occuring due to fortuitous events such as hot plug or outages; holding circuit starts automatically; realize the closure state of current measurement passage; in order to avoid because the open circuit of current measurement passage causes overvoltage or overcurrent, cause measured device unit or circuit-under-test module damage and serious production consequence.
For reaching above-mentioned purpose; on the one hand; the embodiment of the present invention provides a kind of channel card with data collector of hot plug defencive function; comprise at least one current measurement passage; each current measurement passage comprises two incoming lines; each incoming line includes a current measurement terminal and a lead-out terminal; it is characterized in that; described channel card is provided with holding circuit; described holding circuit is used for when described channel card outage; automatically start the closure state of the current measurement passage of realizing described channel card, with the protection measured device.
for reaching above-mentioned purpose, on the other hand, the embodiment of the present invention provides a kind of data collector with hot plug defencive function, described data collector comprises: the main control unit that connects successively, backboard unit and subcard unit, described subcard unit comprises: channel card, described channel card comprises at least one current measurement passage, each current measurement passage comprises two incoming lines, each incoming line includes a current measurement terminal and a lead-out terminal, described channel card also is provided with holding circuit, described holding circuit is used for when described channel card outage, automatically start the closure state of the current measurement passage of realizing described channel card, with the protection measured device.
The embodiment of the present invention provides above-mentionedly has the data collector of hot plug defencive function and the beneficial effect of channel card is: channel card is when measuring current signal; when occuring due to fortuitous events such as hot plug or outages; holding circuit starts automatically; realize the closure state of current measurement passage; in order to avoid because the open circuit of current measurement passage causes overvoltage or overcurrent, cause measured device unit or circuit-under-test module damage and serious production consequence.
Description of drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, the below will do one to the accompanying drawing of required use in embodiment or description of the Prior Art and introduce simply, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of a kind of multi-channel data acquisition unit of prior art;
Fig. 2 is the complete machine structure schematic diagram of the data collector of the embodiment of the present invention;
Fig. 3 is the annexation figure of channel card, rear panel module and the multimeter card of the embodiment of the present invention;
Fig. 4 is the structural representation of the channel card of the embodiment of the present invention 1;
Fig. 5 is the structural representation of the channel card of the embodiment of the present invention 2;
Fig. 6 is the structural representation of the channel card of the embodiment of the present invention 3;
Fig. 7 is the structural representation of the channel card of the embodiment of the present invention 4;
Fig. 8 is the structural representation of the channel card of the embodiment of the present invention 5.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Fig. 2 is a kind of complete machine structure schematic diagram with data collector of hot plug defencive function of the embodiment of the present invention.As shown in Figure 2, this data collector comprises: data collector host machine part (hereinafter referred to as main frame) and data collector subcard part.Wherein, the data collector host machine part comprises: digital master control borad part and back board part.
Numeral master control borad part (main control unit) comprising: digital master control borad, interface unit, display unit, keyboard input block and power supply unit.
Back board part (backboard unit) comprising: emulation bus part, digital communication/control bus and power bus.
Subcard part (module card) comprising: channel card (electric current card), measurement card.Subcard described here comprises channel card and measurement card, refers to that subcard has two kinds of existing waies: channel card and measurement card, they are separate, are not to co-exist in a card.A channel card can be called a subcard, and a measurement card also can be called a subcard.Channel card and measurement card can be connected with the backboard unit by special connector.A plurality of grooves position design of backboard unit can a simultaneous connection channel card or measurement card.Wherein, channel card can be used separately, and measurement card must together be used with channel card.
Further, see also the annexation figure of channel card, rear panel module and the multimeter card of the one embodiment of the invention shown in Fig. 3.The backboard unit comprises current bus and voltage clamp circuit.Current signal line connects channel card and the measurement card of inserting back panel connector, and voltage clamp circuit is realized the voltage clamping of current signal path and current path is provided.Corresponding certain groove of back panel connector position, namely each groove seat cartoon is crossed this connector and is connected with the backboard unit.
In a preferred embodiment, channel card comprises channel switch, by-pass switch, current path circuit, bus switch.Channel switch is used for the switch control of channel current signal and the protection of current channel; By-pass switch is used for the protection of current channel, this switch opens when normally measuring, and during non-measurement, this switch is closed.Bus switch is used for the measurement function switch of signal, realizes that current signal is by the connection control of channel card to the backboard current signal line.When current signal was measured, the job order of switch is: at first by-pass switch remained closed, close passage switch and bus switch, and then open by-pass switch, current signal carries out according to the signal flow direction of arrow shown in Figure 3.
Measurement card comprises sampling resistor R and measurement function circuit.According to U=I * R, sampling resistor R realizes the conversion of current signal and voltage signal; The measurement function circuit is used for measuring the voltage signal Vx after sampling resistor is changed.
When data collector normally moves, cut off the power supply suddenly, the by-pass switch of channel card recovers closure state when power down, has kept the closure state of current measurement passage.And; after current channel card " outage "; channel switch and the bus switch of each passage are opened immediately; this moment, channel switch and bus switch were connected current path circuit separately; in order to be connected to the current path pattern; guaranteed that the path of measuring the current bus of passage is in " closure " state, effectively protects measured device.Foregoing circuit has good reliability, can be applied to preferably various forms of current measurement occasions.
Below further the complete machine structure of the embodiment of the present invention is formed and is elaborated:
Below continue the annexation figure in conjunction with channel card, rear panel module and the multimeter card of the embodiment of the present invention shown in Fig. 3, the principle of work of the data collector of the embodiment of the present invention is described.
The below illustrates working method and the principle of this data collector to measure current signal as example.
At first, current channel card and measurement card are inserted respectively any two in 5 groove positions of main frame, and current signal is connected to a certain passage of channel card.
Then, open host power supply, host-initiated also begins the subcard of self check and scanning groove position, main frame is normal start after, the groove position pilot lamp that has inserted subcard can light, the subcard of sign groove position has inserted and can work.
Then, set up the channel measurement task by the front panel of main frame, namely open channel card current signal input passage and measure, this moment, digital master control borad part sent to instruction the processor (not drawing in figure) of channel card by the digital communication bus of backboard, and then the processor of channel card can will carry out associative operation according to the host command that receives.Concrete operation step is:
1, first closed bus switch and channel switch; Wherein, channel switch and bus switch can be relay or the other types switches of DPDT type.
2, then open by-pass switch; Wherein, the by-pass switch of channel card can be SPDT type relay or other types switch.
This moment, current signal can flow to the backboard emulation bus by the subcard passage, and current signal flows through the sampling resistor R of measurement card, produced sampled voltage Vx.
Main frame sends to measurement card and measures instruction, and measurement card is measured sampled voltage, and measured value is returned to digital master control borad part (main control unit), after main frame obtains measurement result, measurement data is presented on the display screen of front panel.
The measurement procedure of a signal during more than for normal operation.
Should guarantee any moment, the closure state of current measurement passage in any case for the current measurement of the measurement of current signal, particularly current source, namely the phenomenon of opening a way can not appear in the current measurement passage.
After system cut-off, the by-pass switch of channel card is closed, and channel switch and bus switch can be opened, and this circuit design has guaranteed the closure state of current measurement passage, avoid to the full extent system's normal power down or accident power-off to cause current measurement passage open circuit phenomenon.So-called " outage " may cause due to following several situations: 1, cause main frame and channel card outage by operating host panel power switch; 2, main frame power supply accident power-off causes the channel card outage; 3, the channel card hot plug causes the channel card outage.
In addition, due to the channel card hot plug, the circuit of this inventive embodiments also can be protected automatically to it.If channel card is hot plug in measuring process, after channel card outage, the by-pass switch of channel card is closed, and channel switch and bus switch can open, and this circuit design has guaranteed the closure state of current measurement passage.
Below the various structures of the channel card of the embodiment of the present invention and the formation of holding circuit are elaborated.
Embodiment 1:
Fig. 4 is the structural representation of the channel card of the embodiment of the present invention 1.Current channel card shown in Figure 4, with respect to embodiment 5, circuit complexity reduces, and the switching speed of passage also can be faster than embodiment 5.When the circuit pathways of bus switch can prevent from not measuring, passage is operated, can guarantee the closure state of current bus by the current path of bus switch.
The below structure of current channel card of explanation embodiment 1 and the course of work of this current channel card:
1, a channel switch is all arranged on each passage, channel switch keeps " passage shutoff " state when the current channel card is not worked.This moment, channel switch was connected to the current path pattern, current signal can be by the current path circuit of this passage, guaranteed that the path of measuring the current signal line of passage is in " closure " state, channel switch can be carried out by dependent instruction and open or close action after the normal operation of current channel card.
2, each current channel card has a bus switch, and bus switch keeps " passage shutoff " state when the current channel card is not worked.This moment, bus switch was connected to the current path pattern, current signal can pass through the current path circuit, guaranteed that the path of measuring the current bus of passage is in " closure " state, bus switch can be carried out by dependent instruction and open or close action after the normal operation of current channel card.
3, when carrying out the current signal measurement, at first send instruction, the bus switch of closed respective channel, then send instruction, the channel switch of closed respective channel enters the surveying work state of electric current this moment.
4, this embodiment 1 is when carrying out the current signal measurement, and of short duration " open circuit " state can appear in the moment of close passage switch.Can operate by advanced row of channels, then add current signal to be measured, can avoid of short duration " open-circuit condition ".
After below describing outage, the course of work of the current channel card of the present embodiment 1:
After current channel card " outage ", channel switch and the bus switch of each passage are opened immediately, this moment, channel switch and bus switch were connected to the current path pattern, guaranteed that the path of measuring the current bus of passage is in " closure " state, and made two incoming line closures of this current measurement passage.
Embodiment 2:
Fig. 5 is the structural representation of the channel card of the embodiment of the present invention 2.The below structure of current channel card of explanation the present embodiment 2 and the course of work of this current channel card:
1, a channel switch is all arranged on each passage, channel switch keeps " passage shutoff " state when the current channel card is not worked.This moment, channel switch was connected to the current path pattern, current signal can pass through the current path circuit, the path that guarantees the current signal line of measurement passage is in " closure " state, and channel switch can be carried out by dependent instruction and open or close action after the normal operation of current channel card.
2, each current channel card has a bus switch, and bus switch keeps " passage shutoff " state when the current channel card is not worked.Channel switch can be carried out by dependent instruction and open or close action after the normal operation of current channel card.
3, when carrying out the current signal measurement, at first send instruction, closed bus switch, then send instruction, the channel switch of closed respective channel enters the surveying work state of electric current this moment.
4, this embodiment is when carrying out the current signal measurement, and of short duration " open circuit " state can appear in the moment of close passage switch.Can operate by advanced row of channels, then add current signal to be measured, can avoid of short duration " open-circuit condition ".Wherein, described channel operation refers to open passage or close passage.
After below explanation is cut off the power supply, the course of work of the current channel card of the present embodiment 2:
After current channel card " outage ", channel switch and the bus switch of each passage are opened immediately, and this moment, channel switch was connected to the current path pattern, have guaranteed that the current signal line of measuring passage is in " closure " state.
Embodiment 3:
Fig. 6 is the structural representation of the channel card of the embodiment of the present invention 3.Channel card shown in Figure 6 can realize the measurement switching of not opening a way of current path.When the circuit pathways of bus switch can prevent from not measuring, passage is operated, can guarantee the closure state of current bus by current path.
The current channel card of the embodiment of the present invention 3 and the course of work of this current channel card below are described:
1, a by-pass switch and channel switch are all arranged on each passage, by-pass switch keeps " closure " state when the current channel card is not worked.By-pass switch can be carried out by dependent instruction and open or close action after the normal operation of current channel card.Channel switch keeps " passage shutoff " state when the current channel card is not worked.Channel switch can be carried out by dependent instruction and open or close action after the normal operation of current channel card.
2, each current channel card has a bus switch, and bus switch keeps " passage shutoff " state when the current channel card is not worked.This moment, bus switch was connected to the current path pattern, current signal can pass through the current path circuit, the path that guarantees the current bus of measurement passage is in " closure " state, and channel switch can be carried out by dependent instruction and open or close action after the normal operation of current channel card.
3, carrying out current signal when measuring, at first send instruction, the channel switch of closed bus switch and respective channel successively, then send instruction, and open the by-pass switch of respective channel, enter the surveying work state of electric current this moment.
After below explanation is cut off the power supply, the course of work of the current channel card of the present embodiment 3:
After current channel card " outage ", the by-pass switch of each passage enters " closure " state immediately, and channel switch and the bus switch of each passage are opened immediately, this moment, bus switch was connected to the current path pattern, the path that has guaranteed to measure the current bus of passage is in " closure " state, and makes between two incoming lines of this current measurement passage and be in " closure " state.
Embodiment 4:
Fig. 7 is the structural representation of the channel card of the embodiment of the present invention 4.The current channel card of the embodiment of the present invention 4 and the course of work of this current channel card below are described:
1, a by-pass switch and channel switch are all arranged on each passage, by-pass switch keeps " closure " state when the current channel card is not worked.By-pass switch can be carried out by dependent instruction and open or close action after the normal operation of current channel card.Channel switch keeps " passage shutoff " state when the current channel card is not worked.Channel switch can be carried out by dependent instruction and open or close action after the normal operation of current channel card.
2, each current channel card has a bus switch, and bus switch keeps " passage shutoff " state when the current channel card is not worked.Channel switch can be carried out by dependent instruction and open or close action after the normal operation of current channel card.
3, when carrying out the current signal measurement, at first send instruction, the channel switch of closed respective channel and bus switch, then send instruction, and open the by-pass switch of respective channel, enter the surveying work state of electric current this moment.
After below describing outage, the current channel card course of work of the present embodiment 4:
After current channel card " outage ", the by-pass switch of each passage enters " closure " state immediately, and the channel switch of each passage and bus switch open immediately, has guaranteed that the current signal line of measuring passage is in " closure " state.
Embodiment 5:
The present embodiment 5 can be realized the measurement switching of not opening a way of current path; pass through by-pass switch; the current path circuit of channel switch and bus switch; no matter how switch moves; all can realize " closure " state of current bus passage; better protect equipment under test or device, security is better than other schemes.Fig. 8 is the channel card structural representation of the embodiment of the present invention 5.
The structure of current channel card of embodiment 5 and the course of work of this current channel card are below described:
The channel card of the data collector with hot plug defencive function shown in Fig. 8; comprise a plurality of current measurement passage ch1-chx; take current measurement passage ch1 as example; it comprises two incoming lines 401,402; each incoming line includes a current measurement terminal and a lead-out terminal, and this channel card is provided with holding circuit, and holding circuit is used for when channel card is cut off the power supply; automatically start the closure state of the current measurement passage of realizing channel card, with the protection measured device.Channel card also comprises: the current bus 403,404 that is connected with two incoming lines of each current measurement passage.
Holding circuit comprises:
Be arranged in parallel the by-pass switch between two incoming lines of current measurement passage, be used for when channel card is cut off the power supply, make between two incoming lines closed.This by-pass switch is normally closed switch, and normally closed switch comprises non-latching relay.
Holding circuit also comprises: with two channel switchs that incoming line is connected in series of current measurement passage.
Holding circuit also comprises: the first current path circuit that is connected with channel switch, channel switch are used for connecting the first current path circuit when channel card is cut off the power supply, and make channel switch be connected to the current path pattern with closed two incoming lines.
Holding circuit also comprises: be arranged on the bus switch on current bus.
Holding circuit also comprises: the second current path circuit that is connected with bus switch, bus switch also are used for connecting the second current path circuit when channel card is cut off the power supply, and make bus switch be connected to the current path pattern with the closed path bus.
Wherein, by-pass switch is single-pole single-throw switch (SPST), and channel switch and bus switch are double-point double-throw switchs.
1, a by-pass switch and channel switch are all arranged on each passage, by-pass switch keeps " closure " state when the current channel card is not worked.By-pass switch can be carried out by dependent instruction and open or close action after the normal operation of current channel card.Channel switch keeps " passage shutoff " state when the current channel card is not worked.This moment, channel switch was connected to the current path pattern, and current signal can pass through the current path circuit, guaranteed " closure " state of current path, and channel switch can be carried out by dependent instruction and open or close action after the normal operation of current channel card.Wherein, channel switch is realized controlling by order.The effect of above-mentioned current path circuit is the continuation that keeps current signal path.
2, each current channel card has a bus switch, and bus switch keeps " passage shutoff " state when the current channel card is not worked.This moment, bus switch was connected to the current path pattern, and current signal can pass through the current path circuit, guaranteed " closure " state of current path, and bus switch can be carried out by dependent instruction and open or close action after the normal operation of current channel card.
Wherein, under the current path pattern, this passage is closure state, and current signal can form the closed-loop path.For the channel switch in embodiment 5, the OFF state of passage is the current path pattern.
3, carrying out current signal when measuring, at first digital main control unit sends instruction, the channel switch of closed bus switch and respective channel successively, then send instruction, and open the by-pass switch of respective channel, enter the surveying work state of electric current this moment.
After below being described in outage, the course of work of the current channel card of embodiment 5:
After current channel card " outage ", the by-pass switch of each passage enters " closure " state immediately, and channel switch and the bus switch of each passage are opened immediately, this moment, channel switch and bus switch were connected to the current path pattern, had guaranteed that the path of measuring the current bus of passage is in " closure " state.
The advantage of the above embodiment of the present invention is; channel card is when measuring current signal; when occuring due to fortuitous events such as hot plug or outages; holding circuit starts automatically; realize the closure state of current measurement passage; in order to avoid because the open circuit of current measurement passage causes overvoltage or overcurrent, cause measured device unit or circuit-under-test module damage and serious production consequence.
Above embodiment only in order to the technical scheme of the embodiment of the present invention to be described, is not intended to limit; Although with reference to previous embodiment, the embodiment of the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of each embodiment technical scheme of the embodiment of the present invention.
Claims (20)
1. channel card with data collector of hot plug defencive function; comprise at least one current measurement passage; each current measurement passage comprises two incoming lines; each incoming line includes a current measurement terminal and a lead-out terminal; it is characterized in that, described channel card is provided with holding circuit, and described holding circuit is used for when described channel card outage; automatically start the closure state of the current measurement passage of realizing described channel card, with the protection measured device.
2. channel card according to claim 1, is characterized in that, described holding circuit comprises:
Be arranged in parallel the by-pass switch between described two incoming lines of described current measurement passage, be used for making between described two incoming lines closed when described channel card outage.
3. channel card according to claim 2, is characterized in that, described by-pass switch is normally closed switch, and described normally closed switch comprises non-latching relay.
4. channel card according to claim 2, is characterized in that, described holding circuit also comprises: with described two channel switchs that incoming line is connected in series of described current measurement passage.
5. channel card according to claim 4; it is characterized in that; described holding circuit also comprises: the first current path circuit that is connected with described channel switch; described channel switch is used for connecting described the first current path circuit when described channel card outage, makes described channel switch be connected to the current path pattern with described two incoming lines of closure.
6. according to claim 4 or 5 described channel card; it is characterized in that; described channel card also comprises: with two current bus that incoming line is connected of each current measurement passage, described holding circuit also comprises: be arranged on the bus switch on described current bus.
7. channel card according to claim 6; it is characterized in that; described holding circuit also comprises: the second current path circuit that is connected with described bus switch; described bus switch also is used for connecting described the second current path circuit when described channel card outage, makes described bus switch be connected to the current path pattern with the described current bus of closure.
8. channel card according to claim 6, is characterized in that, described by-pass switch is single-pole single-throw switch (SPST), and described channel switch and described bus switch are double-point double-throw switchs.
9. channel card according to claim 1, is characterized in that, described channel card also comprises: with two current bus that incoming line is connected of each current measurement passage; Described holding circuit comprises:
Described two channel switchs that incoming line is connected in series with described current measurement passage;
The the first current path circuit that is connected with described channel switch, described channel switch also are used for connecting described the first current path circuit when described channel card outage, make described channel switch be connected to the current path pattern with described two incoming lines of closure; And,
Be arranged on the bus switch on described current bus.
10. channel card according to claim 9; it is characterized in that; described holding circuit also comprises: the second current path circuit that is connected with described bus switch; described bus switch also is used for connecting described the second current path circuit when described channel card outage, makes described bus switch be connected to the current path pattern with the described current bus of closure.
11. data collector with hot plug defencive function, it is characterized in that, described data collector comprises: the main control unit that connects successively, backboard unit and subcard unit, described subcard unit comprises: channel card, described channel card comprises at least one current measurement passage, each current measurement passage comprises two incoming lines, each incoming line includes a current measurement terminal and a lead-out terminal, described channel card also is provided with holding circuit, described holding circuit is used for when described channel card outage, automatically start the closure state of the current measurement passage of realizing described channel card, with the protection measured device.
12. data collector according to claim 11; it is characterized in that; described holding circuit comprises: be arranged in parallel the by-pass switch between described two incoming lines of described current measurement passage, be used for making between described two incoming lines closed when described channel card outage.
13. data collector according to claim 12 is characterized in that, described by-pass switch is normally closed switch, and described normally closed switch comprises non-latching relay.
14. data collector according to claim 12 is characterized in that, described holding circuit also comprises: with described two channel switchs that incoming line is connected in series of described current measurement passage.
15. data collector according to claim 14; it is characterized in that; described holding circuit also comprises: the first current path circuit that is connected with described channel switch; described channel switch is used for connecting described the first current path circuit when described channel card outage, makes described channel switch be connected to the current path pattern with described two incoming lines of closure.
16. according to claim 14 or 15 described data collectors; it is characterized in that; described channel card also comprises: with two current bus that incoming line is connected of each current measurement passage, described holding circuit also comprises: be arranged on the bus switch on described current bus.
17. data collector according to claim 16; it is characterized in that; described holding circuit also comprises: the second current path circuit that is connected with described bus switch; described bus switch also is used for connecting described the second current path circuit when described channel card outage, makes described bus switch be connected to the current path pattern with the described current bus of closure.
18. data collector according to claim 16 is characterized in that, described by-pass switch is single-pole single-throw switch (SPST), and described channel switch and described bus switch are double-point double-throw switchs.
19. data collector according to claim 11 is characterized in that, described channel card also comprises: with two current bus that incoming line is connected of each current measurement passage; Described holding circuit comprises:
Described two channel switchs that incoming line is connected in series with described current measurement passage;
The the first current path circuit that is connected with described channel switch, described channel switch also are used for connecting described the first current path circuit when described channel card outage, make described channel switch be connected to the current path pattern with described two incoming lines of closure; And,
Be arranged on the bus switch on described current bus.
20. data collector according to claim 19; it is characterized in that; described holding circuit also comprises: the second current path circuit that is connected with described bus switch; described bus switch also is used for connecting described the second current path circuit when described channel card outage, makes described bus switch be connected to the current path pattern with the described current bus of closure.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040070908A1 (en) * | 2002-09-27 | 2004-04-15 | International Business Machines Corporation | Overcurrent protection of input/output devices in a data processing system |
| CN201133917Y (en) * | 2007-10-12 | 2008-10-15 | 陕西海泰电子有限责任公司 | Portable multifunctional universal tester |
| CN101424929A (en) * | 2008-11-25 | 2009-05-06 | 连云港杰瑞电子有限公司 | Multichannel angle data sampler |
| CN101661276A (en) * | 2009-09-18 | 2010-03-03 | 东北大学 | Universal data acquisition unit and data acquisition method thereof |
-
2011
- 2011-12-21 CN CN201110431240.3A patent/CN103176034B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040070908A1 (en) * | 2002-09-27 | 2004-04-15 | International Business Machines Corporation | Overcurrent protection of input/output devices in a data processing system |
| CN201133917Y (en) * | 2007-10-12 | 2008-10-15 | 陕西海泰电子有限责任公司 | Portable multifunctional universal tester |
| CN101424929A (en) * | 2008-11-25 | 2009-05-06 | 连云港杰瑞电子有限公司 | Multichannel angle data sampler |
| CN101661276A (en) * | 2009-09-18 | 2010-03-03 | 东北大学 | Universal data acquisition unit and data acquisition method thereof |
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