CN203642991U - Double-needle liquid level detecting system - Google Patents
Double-needle liquid level detecting system Download PDFInfo
- Publication number
- CN203642991U CN203642991U CN201320875361.1U CN201320875361U CN203642991U CN 203642991 U CN203642991 U CN 203642991U CN 201320875361 U CN201320875361 U CN 201320875361U CN 203642991 U CN203642991 U CN 203642991U
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- China
- Prior art keywords
- metal sleeve
- described metal
- metal bar
- liquid level
- level detection
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Abstract
The utility model discloses a double-needle liquid level detecting system and relates to a medical instrument. The double-needle liquid level detecting system comprises a metal casing pipe. A metal rod is arranged in the metal casing pipe in a penetrating mode, an insulating pipe is arranged between the metal casing pipe and the metal rod and the outer wall of the metal rod adheres to the inner wall of the insulating pipe. The inner wall of the metal casing pipe adheres to the outer wall of the insulating pipe. The metal casing pipe and the metal bar are connected through a wire. A filter circuit is used for smoothing voltage signals generated by the metal casing pipe and the metal rod. The output end of the filter circuit is connected with the input end of a voltage frequency converter. The output end of the voltage frequency converter is connected with the input end of a processor. The double-needle liquid level detecting system is strong in anti-interference capacity of liquid level detecting, simple in detection manner and low in cost.
Description
Technical field
The utility model relates to a kind of medicine equipment, particularly relates to a kind of two pointer type fluid level detection system.
Background technology
Most medicine equipment level detection mode all adopts resistance-type liquid level sensor or condenser type liquid level sensor to detect blood liquid level, adopt these two kinds of modes to require on the one hand test tube storing unit to design with metal or the article of conduction, can increase to bear a heavy burden to product undoubtedly and also will inevitably increase the cost of level detection mode, also require on the other hand user also must have in use good ground connection, but the poor user of some conditions is difficult to reach this requirement in the process of actual motion, increase the error detecting, cause the out of true detecting.
Utility model content
Because the above-mentioned defect of prior art, technical problem to be solved in the utility model is to provide a kind of two pointer type fluid level detection system that can reduce testing cost and reduce grounding requirement.
For achieving the above object, the utility model provides a kind of two pointer type fluid level detection system, comprises metal sleeve, in described metal sleeve, is equipped with metal bar; Between described metal sleeve and described metal bar, be provided with insulation tube, the outer wall of described metal bar and the laminating of the inwall of described insulation tube, the inwall of described metal sleeve and the laminating of the outer wall of described insulation tube; Described metal sleeve is connected by wire respectively with metal bar, described filtering circuit is for carrying out filtering to the voltage signal of metal sleeve and metal bar generation, the output terminal of described filtering circuit connects the input end of voltage to frequency converter, and the output terminal of described voltage to frequency converter connects the input end of processor.
Adopt above technical scheme, when metal sleeve and metal bar do not touch liquid level, between metal sleeve and metal bar because there is insulation tube isolated, it between metal sleeve and metal bar, is now off state, in the time that metal sleeve contacts liquid level with metal bar, now because the electric action of liquid is by metal sleeve and metal bar short circuit, now filtering circuit detects the signal of short circuit between metal sleeve and metal bar and is carried out after filtering processing, send to again voltage to frequency converter, voltage to frequency converter is transformed to pulse signal by analog voltage amount and then sends to processor, processor receives this pulse signal, to realize level detection.
Further, also comprise the stepper motor for driving described metal sleeve to move, described processor is connected with the driving circuit of described stepper motor, and described processor output control signal is given the driving circuit of described stepper motor.Adopt above technical scheme, processor receives after the pulse signal that voltage to frequency converter sends out, and sends the driving circuit of high level instruction to stepper motor, to control this stepper motor motion, has realized the closed-loop control of level detection.
Described metal bar two ends all flush with described metal sleeve.Adopt above technical scheme, can in the time that metal sleeve and metal bar touch liquid level, produce immediately short-circuit signal, speed is faster, makes the detection of liquid level more accurate.
Preferably, described metal bar one end flushes with described metal sleeve, and the other end of this metal bar stretches out described metal sleeve.Adopt above technical scheme, increase the area contacting with liquid between refining metal sleeve and metal bar, can further improve accuracy of detection.
Preferably, the part that described metal bar stretches out described metal sleeve scribbles conductive water repellent nano paint.Adopt above technical scheme, the precision that can avoid the liquid of adhesion in the time that probe departs from liquid level to detect.
The beneficial effects of the utility model are: the utility model level detection antijamming capability is strong; Detection mode is simple, and cost is lower.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment mono-.
Fig. 2 is the structural representation of the utility model embodiment bis-.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail:
Embodiment mono-: as shown in Figure 1, a kind of two pointer type fluid level detection system, comprises metal sleeve 1, is equipped with metal bar 2 in described metal sleeve 1; Between described metal sleeve 1 and described metal bar 2, be provided with insulation tube 3, the inwall laminating of the outer wall of described metal bar 2 and described insulation tube 3, the outer wall laminating of the inwall of described metal sleeve 1 and described insulation tube 3; The cut-open view that in Fig. 1, metal sleeve 1 and metal bar 2 places are it, as can be seen from the figure metal bar is stuck in metal sleeve by insulation tube.Described metal sleeve 1 is connected by wire respectively with metal bar 2, described filtering circuit 4 carries out filtering for the voltage signal that metal sleeve 1 and metal bar 2 are produced, the output terminal of described filtering circuit 4 connects the input end of voltage to frequency converter 5, and the output terminal of described voltage to frequency converter 5 connects the input end of processor 6.The utility model also comprises the stepper motor 7 for driving described metal sleeve 1 to move, and described processor 6 is connected with the driving circuit of described stepper motor 7, and described processor 6 is exported the driving circuit of control signal to described stepper motor 7.Described metal bar 2 one end flush with described metal sleeve 1, and the other end of this metal bar 2 stretches out described metal sleeve 1.The part that described metal bar 2 stretches out described metal sleeve 1 scribbles conductive water repellent nano paint.
In the present embodiment, described filtering circuit 4, voltage to frequency converter 5 and stepper motor 7 are all arranged in casing, the output terminal of described stepper motor 7 is set with driving wheel, this driving wheel connects engaged wheel by belt, this engaged wheel is fixed on casing inner wall, described metal sleeve is vertically fixed on belt, the output shaft rotation of stepper motor 7 drives belt action, thereby control the movement of described metal sleeve and metal bar, certainly, stepper motor drives the liquid level sensor of fluid level detection system can also adopt other forms, and it is prior art, does not repeat them here.
Embodiment bis-: as shown in Figure 2, the structure of the present embodiment and embodiment mono-are basic identical, and difference is: described metal bar 2 two ends all flush with described metal sleeve 1.
More than describe preferred embodiment of the present utility model in detail.Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to design of the present utility model without creative work.Therefore, all technician in the art comply with design of the present utility model on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment, all should be in by the determined protection domain of claims.
Claims (5)
1. a two pointer type fluid level detection system, is characterized in that: comprise metal sleeve (1), be equipped with metal bar (2) in described metal sleeve (1); Between described metal sleeve (1) and described metal bar (2), be provided with insulation tube (3), the inwall laminating of the outer wall of described metal bar (2) and described insulation tube (3), the outer wall laminating of the inwall of described metal sleeve (1) and described insulation tube (3); Described metal sleeve (1) is connected by wire respectively with metal bar (2), described filtering circuit (4) is for carrying out filtering to the voltage signal of metal sleeve (1) and metal bar (2) generation, the output terminal of described filtering circuit (4) connects the input end of voltage to frequency converter (5), and the output terminal of described voltage to frequency converter (5) connects the input end of processor (6).
2. two pointer type fluid level detection system as claimed in claim 1, it is characterized in that: also comprise for driving the mobile stepper motor (7) of described metal sleeve (1), described processor (6) is connected with the driving circuit of described stepper motor (7), and described processor (6) output control signal is given the driving circuit of described stepper motor (7).
3. two pointer type fluid level detection system as claimed in claim 1, is characterized in that: described metal bar (2) one end flushes with described metal sleeve (1), and the other end of this metal bar (2) stretches out described metal sleeve (1).
4. two pointer type fluid level detection system as claimed in claim 1, is characterized in that: described metal bar (2) two ends all flush with described metal sleeve (1).
5. two pointer type fluid level detection system as claimed in claim 2, is characterized in that: the part that described metal bar (2) stretches out described metal sleeve (1) scribbles conductive water repellent nano paint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320875361.1U CN203642991U (en) | 2013-12-27 | 2013-12-27 | Double-needle liquid level detecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320875361.1U CN203642991U (en) | 2013-12-27 | 2013-12-27 | Double-needle liquid level detecting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203642991U true CN203642991U (en) | 2014-06-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320875361.1U Expired - Fee Related CN203642991U (en) | 2013-12-27 | 2013-12-27 | Double-needle liquid level detecting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203642991U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104359529A (en) * | 2014-11-11 | 2015-02-18 | 常熟理工学院 | Sensing detecting device for liquid level of biochemical analyzer and method |
-
2013
- 2013-12-27 CN CN201320875361.1U patent/CN203642991U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104359529A (en) * | 2014-11-11 | 2015-02-18 | 常熟理工学院 | Sensing detecting device for liquid level of biochemical analyzer and method |
| CN104359529B (en) * | 2014-11-11 | 2017-12-29 | 常熟理工学院 | A kind of biochemical instruments liquid level sensing detection device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140611 Termination date: 20141227 |
|
| EXPY | Termination of patent right or utility model |