CN201159740Y

CN201159740Y - Multi-path simultaneous measurement device

Info

Publication number: CN201159740Y
Application number: CNU2008200788109U
Authority: CN
Inventors: 黄建国; 韩建伟; 马英起; 封国强; 李宏伟; 蔡明辉; 李小银; 张振龙; 闫小娟; 全荣辉
Original assignee: National Space Science Center of CAS
Current assignee: National Space Science Center of CAS
Priority date: 2008-01-29
Filing date: 2008-01-29
Publication date: 2008-12-03
Anticipated expiration: 2018-01-29

Abstract

The utility model provides a multi-channel simultaneous measuring device which comprises at least two sensors, a charge amplifier, an adder, at least two trigger switches and a circuit used for controlling the closing sequence of the at least two trigger switches; wherein, a sensor is connected with a trigger switch; the trigger switch conducts or cut off according to a certain sequence; the input end of the adder is connected with all the trigger switches; the output end of the adder is connected with the charge amplifier. The multi-channel simultaneous measuring device only needs a charge amplifier and effectively saves the hardware cost; the multi-channel simultaneous measuring device has the advantages of only occupying one oscilloscope sampling channel, saving the oscilloscope resource, independently dividing and measuring the target, providing the concrete area information of the impact and having certain space resolving power.

Description

A kind of multi-track simultaneous device

Technical field

The utility model relates to the high rate particle speed detection system, particularly the multi-track simultaneous device in the high speed particle detection system.

Background technology

The high rate particle speed detection system is a kind of system that the flying speed of high speed particle is measured of being used for.Fig. 1 is the structural drawing of this system, as can be seen from the figure, arrival was positioned on the target of target chamber a through dirft tube c after particulate d was produced by the fragment generator, the shockwave signals that is produced when receiving high speed particle bump target by the piezoelectric sensor b on the target, thereby obtain the time of arrival of particulate, and then extrapolate the speed of particulate.

For different local bump signals on the same target of perception, a target can be divided into some distinct area, each subregion is provided with a piezoelectric sensor.In the prior art, the corresponding passage of piezoelectric sensor, as shown in Figure 2, a piezoelectric sensor is connected on the charge amplifier, and then is connected with an oscillograph.Can obtain the bump signal of high speed particle on a specific region by this connected mode.

But also there is certain defective in this connected mode of the prior art.For example, piezoelectric sensor and interchannel this one-to-one relationship make the increase that can cause corresponding oscillograph acquisition channel quantity on target when a plurality of piezoelectric sensor is set.Do the hardware cost that obviously can improve total system like this, and on safeguarding, also exist certain inconvenience.

Summary of the invention

Under the situation that overcomes target subregion in the prior art, oscillograph acquisition channel quantity is too much, the defective of easy care not, the device that the utility model provides acquisition channel of a kind of usefulness to measure a plurality of sensors.

To achieve these goals, the utility model provides a kind of multi-track simultaneous device, comprise at least two sensors, charge amplifier, also comprise totalizer, at least two trigger switches and the circuit that the closing order of described at least two trigger switches is controlled; Wherein,

Each described sensor is connected on the described trigger switch, described trigger switch is switched on or switched off in a certain order, the incoming end of described totalizer is connected with all trigger switches, and the output terminal of described totalizer is connected on the described charge amplifier.

In the technique scheme, the described circuit that the closing order of described at least two trigger switches is controlled is a trigger pip generation circuit, and described trigger pip generation circuit sends to described trigger switch and triggers control signal to realize described closing order.

In the technique scheme, described trigger pip generation circuit is according to sending the triggering control signal successively for each trigger switch certain time delay.

In the technique scheme, be set at following value described certain time delay: with cycle of the clock pulse signal of described trigger pip generation circuit divided by the resulting result of described sensor number.

In the technique scheme, also comprise the oscillograph that a signal that is used for described sensor shows, described oscillograph is connected on the described charge amplifier.

The utility model provides a kind of high rate particle speed detection system that has adopted described multi-track simultaneous device again, the particulate that fragment generator is produced arrives described multi-track simultaneous device by flight corridor, by described multi-track simultaneous device the flying speed of described particulate is measured.

Advantage of the present utility model is:

Even 1, in the multi-track simultaneous device of the present utility model a plurality of sensors are arranged, also only need a charge amplifier, effectively saved hardware cost.

2, multi-track simultaneous device of the present utility model only need take No. one oscillograph acquisition channel, has saved oscillographic resource.

3, the utility model provides the concrete area information of bump simultaneously with target independent partitions and measurement, has certain spatial resolving power.

Description of drawings

Below, describe embodiment of the present utility model in conjunction with the accompanying drawings in detail, wherein:

Fig. 1 is the structural drawing of high rate particle speed detection system of the prior art;

Fig. 2 is sensor of the prior art and interchannel annexation figure;

Fig. 3 is a sensor distribution plan in one embodiment;

Fig. 4 is a multi-track simultaneous device of the present utility model circuit diagram in one embodiment;

Fig. 5 is the synoptic diagram after the original signal process multi-track simultaneous device of the present utility model of sensor acquisition is realized signal mixing and signal reduction.

The drawing explanation

A target chamber b piezoelectric sensor c dirft tube

D particulate 1-4 sensor

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

Multi-track simultaneous device of the present utility model utilizes signal principle synthetic and the signal reduction to realize the collection of single passage to a plurality of sensor signals.This device is made up of sensor, trigger pip generation circuit, trigger switch, totalizer, charge amplifier and oscillograph.

Described sensor has 4, and as shown in Figure 3,

sensor

1,2,3,4 is distributed on the diverse location of a target independently of one another.In the present embodiment, the quantity of described sensor is 4, but in actual use, the concrete quantity of sensor can be decided by actual experiment precision prescribed and the available port number of experimental facilities, usually between 1-16.

Fig. 4 is the utility model manipulated or operated apparatus in the present embodiment, from figure, can know,

piezoelectric sensor

1,2,3,4 shown in Fig. 3 is connected with trigger switch k1, k2, k3, k4 respectively, simultaneously, described trigger switch k1, k2, k3, k4 also are connected respectively on the trigger pip generation circuit, and triggering control signal S1, S2, S3, the S4 that trigger pip generation circuit is generated is used for controlling the connecting and disconnecting of trigger switch k1, k2, k3, k4.In the present embodiment, when the triggering control signal is high level, the relative trigger switch conduction, when the triggering control signal was low level, the relative trigger switch disconnected.Described triggering control signal is to be the clock pulse signal of T in the cycle, and four triggering control signal S1, S2, S3, S4 postpone T/4 in turn.In actual applications, trigger the cycle size of control signal and can experimental accuracy requirement regulate, and the different order of delay that triggers between control signal also can be done corresponding adjusting.Mix in totalizer in the sensor signal that difference is gathered constantly, to generate mixed signal.Resulting mixed signal is amplified the back by charge amplifier and is shown on oscillograph.

Unlike the prior art be in the utility model, only to need one group of charge amplifier and oscillograph in the whole device, and do not need charge amplifier and oscillograph according to the quantity configuration respective numbers of piezoelectric sensor.In addition, what link to each other with charge amplifier is not limited to oscillograph related in the present embodiment, can also adopt other to show electronic equipment with storage to sensor signal.

When adopting multi-track simultaneous device of the present utility model that particulate is measured, at first send to trigger switch and trigger control signal by trigger pip generation circuit; The original signal that produces when clashing into by the sensor acquisition high speed particle then; Trigger switch is switched on or switched off under the control of described triggering control signal; Totalizer is synthesized together the original signal of each sensor of acquisition time, obtains mixed signal; Mixed signal is amplified the back through described charge amplifier and is shown on described oscillograph.

In the present embodiment, after signal of sensor is controlled through switch, in each period T, the 1st T/4 of the y1 signal that the 1 road signal u1 pick-up transducers 1 is generated, the 2nd T/4 of the y2 signal that the 2 road signal u2 pick-up transducers 2 is generated, ..., the rest may be inferred, addition when resulting each road signal passes through totalizer, realize the synthetic of each road signal, obtain one " mixed signal ",, comprised the signal that every road sensor detects in " mixed signal " exported by the output of out end.

Resulting mixed signal can also be reduced into original signal.During the signal reduction, read the data of the 1st T/4 in each cycle in the mixed signal, will obtain the u1 curve after the stack of the relevant information in a plurality of cycles; Read the data of the 2nd T/4 in each cycle in the out signal, will obtain the u2 curve after the stack of the relevant information in a plurality of cycles; The rest may be inferred.Effect after the reduction is equivalent to gather a point every 4 points in the original signal, meets the accuracy requirement that experiment itself is gathered the bump signal results.

Below in conjunction with Fig. 5 the mixing and the reduction process of signal are described.

The original signal of

supposing sensor

1,2,3,4 outputs is respectively shown in the y1 among Fig. 5, y2, y3, y4, under the control of trigger pip generation circuit of the present utility model, trigger switch K1, K2, K3, K4 are respectively in the 1st T/4 of each period T, the 2nd T/4, the 3rd T/4, the 4th T/4 conducting, thereby obtain the result of original signal in the corresponding time period, the signal of resulting u1, u2, u3, u4 as shown in FIG., per pass signals sampling rate is reduced to original 1/4.U1, u2, u3, u4 obtain " mixed signal " after the totalizer addition, described " mixed signal " is shown in the out among Fig. 5.

In the signal reduction process, read the data of the 1st T/4 in each cycle in the out signal, obtain the u1 curve; Read the data of the 2nd T/4 in each cycle in the out signal, obtain the u2 curve; The rest may be inferred.Effect after the reduction is equivalent to gather a point every 4 points in the original signal, meets the accuracy requirement that experiment itself is gathered the bump signal results.For fear of in reduction out signal process, the same part of the repeated acquisition original signal that may occur, thereby can't obtain complete original signal, can be in generating the process of mixed signal, differently trigger order of delay between control signals by regulating to overcome this defective.

By above-mentioned signal synthetic with reduction process as can be seen, compare with similar device of the prior art, utilize in the process that multi-track simultaneous device of the present utility model measures, though the hardware unit of multi-track simultaneous device itself is simplified, on final measurement effect, do not reduce.

Multiple tracks measurement mechanism of the present utility model can directly apply on the existing high rate particle speed detection system, and data synthesis method of the present utility model is suitable equally to the situation that is subjected to similar hardware resource restriction in any data monitoring, collection and the transmission field.

It should be noted last that above embodiment is only unrestricted in order to the explanation the technical solution of the utility model.Although the utility model is had been described in detail with reference to embodiment, those of ordinary skill in the art is to be understood that, the technical solution of the utility model is made amendment or is equal to replacement, the spirit and scope that do not break away from technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.

Claims

1, a kind of multi-track simultaneous device comprises at least two sensors, charge amplifier, it is characterized in that, also comprises totalizer, at least two trigger switches and the circuit that the closing order of described at least two trigger switches is controlled; Wherein,

2, multi-track simultaneous device according to claim 1, it is characterized in that, the described circuit that the closing order of described at least two trigger switches is controlled is a trigger pip generation circuit, and described trigger pip generation circuit sends to described trigger switch and triggers control signal to realize described closing order.

3, multi-track simultaneous device according to claim 2 is characterized in that, described trigger pip generation circuit is according to sending the triggering control signal successively for each trigger switch certain time delay.

4, multi-track simultaneous device according to claim 3, it is characterized in that, be set at following value described certain time delay: with cycle of the clock pulse signal of described trigger pip generation circuit divided by the resulting result of described sensor number.

5, multi-track simultaneous device according to claim 1 is characterized in that, also comprises the oscillograph that a signal that is used for described sensor shows, described oscillograph is connected on the described charge amplifier.

6, a kind of high rate particle speed detection system that adopts the described multi-track simultaneous device of claim 1-5, it is characterized in that, the particulate that fragment generator is produced arrives described multi-track simultaneous device by flight corridor, by described multi-track simultaneous device the flying speed of described particulate is measured.