IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0483083
(2002-07-06)
|
우선권정보 |
DE-101 32 530(2001-07-09) |
국제출원번호 |
PCT/EP02/007554
(2002-07-06)
|
§371/§102 date |
20040706
(20040706)
|
국제공개번호 |
WO03/006998
(2003-01-23)
|
발명자
/ 주소 |
- Preckel,Hartwig
- Wendt,Oliver
- Ehlert,Axel
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
4 |
초록
▼
In a method for monitoring the operability of a liquid delivery device such as a dispenser (10), a response signal of a liquid-transformer system consisting of a transformer (24) and a chamber (12) containing a liquid is compared with a reference value. Preferably, the reference value is determined
In a method for monitoring the operability of a liquid delivery device such as a dispenser (10), a response signal of a liquid-transformer system consisting of a transformer (24) and a chamber (12) containing a liquid is compared with a reference value. Preferably, the reference value is determined when the liquid-transformer system is operative, i.e., non-disturbed. The response signal differs from the reference value if there are air bubbles in the chamber (12), for example. By comparing the response signal with the reference value, a correction step such as a cleaning cycle can be performed when a limit value is exceeded or fallen short of.
대표청구항
▼
The invention claimed is: 1. Method for monitoring the operability of a liquid delivery device adapted to be employed for delivering chemical and/or biological liquids, comprising the step of: supplying a liquid receiving portion and a transformer acting on the liquid in the liquid receiving portio
The invention claimed is: 1. Method for monitoring the operability of a liquid delivery device adapted to be employed for delivering chemical and/or biological liquids, comprising the step of: supplying a liquid receiving portion and a transformer acting on the liquid in the liquid receiving portion, exciting the transformer with an excitation signal, acquiring a response signal caused by the excilation signal of the liquid-transformer system, comparing the response signal with a reference value, and performing a correction step depending on the result of the comparison, wherein he excitation signal also serves as a signal by which the liquid delivery device is simultaneously operated to deliver liquid. 2. The method of claim 1, wherein the reference value is the response signal of the operative liquid-transformer system. 3. The method of claim 2, wherein the reference value is determined by measuring the response signal of an operative liquid-transformer system at or near a resonance frequency. 4. The method of claim 1, wherein the correction step is performed when a limit value (φs) is exceeded or fallen short of. 5. The method of claim 1, wherein the reference value is the response signal of a malfunctioning liquid-transformer system. 6. The method of claim 5, wherein the reference value is determined by measuring the response signal of a malfunctioning liquid-transformer system at or near a resonance frequency. 7. The method of claim 1, wherein the correction step is performed when the response signal lies within a preset deviation of the reference value. 8. The method of claim 1, wherein different reference values are stored in the control means in dependence on the type of disturbance occurring. 9. The method of claim 1, wherein the reference values are determined by means of a mathematical substitute model of the liquid delivery device or by means of computer simulation. 10. The method of claim 1, wherein the correction step is performed after the limit value (φs) has been exceeded/fallen short of repeatedly or a response signal within the preset deviation from the reference value has occurred repeatedly. 11. The method of claim 1, wherein the reference value is a function in dependence on time. 12. The method of claim 1, wherein the liquid onto which the transformer acts is disposed in a chamber and/or capillary. 13. The method of claim 1, wherein the response signal and/or the reference value are determined by means of the impedance of the liquid-transformer system. 14. The method of claim 1, wherein the response signals are determined by means of a mathematical transform. 15. The method of claim 14, wherein the amplitudes and/or phase shifts of the response signals are compared. 16. The method of claim 1, wherein the type of error is determined on the basis of the response signal. 17. The method of claim 1, wherein the excitation signal and the response signal are overlaid on each other in time at least partially. 18. A liquid delivery device, particularly for the delivery of minimum quantities of chemical and/or biological liquids, comprising a liquid receiving portion, a transformer acting on the liquid, and a control means connected with the transformer, for exciting the transformer with an excitation signal, for acquiring a response signal of the liquid-transformer system and for comparing a reference value with the response signal, wherein the response signal sent by the liquid-transformer system is caused by the excitation signal, and wherein the excitation signal also serves as a signal by which the liquid delivery device is simultaneously operated to deliver liquid. 19. The liquid delivery device of claim 18, characterized in that the liquid transformer system producing the response signal comprises the transformer as well as the liquid in the liquid receiving portion. 20. The liquid delivery device of claim 18, characterized in that a reference value is stored in the control means. 21. The liquid delivery device of claim 20, characterized in that the reference value is stored in dependence on the liquid properties and/or liquid quantity on which the transformer acts. 22. The liquid delivery device of claim 18, characterized in that in the control means, response signals are stored each of which has a type of error allocation thereto. 23. The liquid delivery device of claim 18, characterized in that the transformer acts as an actuator and as a sensor at the same time.
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