CN202546276U - Device for monitoring flow of undetached hydraulic pipeline - Google Patents
Device for monitoring flow of undetached hydraulic pipeline Download PDFInfo
- Publication number
- CN202546276U CN202546276U CN 201220067395 CN201220067395U CN202546276U CN 202546276 U CN202546276 U CN 202546276U CN 201220067395 CN201220067395 CN 201220067395 CN 201220067395 U CN201220067395 U CN 201220067395U CN 202546276 U CN202546276 U CN 202546276U
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- China
- Prior art keywords
- hydraulic
- pipeline
- flow
- undetached
- signal processing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model provides a device for measuring the flow of an undetached hydraulic pipeline considering that most of hydraulic oil pipes are rubber pipes. The device for monitoring the flow of the undetached hydraulic pipeline comprises a pressure sensor which is arranged outside a rubber oil pipe, wherein the pressure sensor is connected with a signal processing circuit; and the signal processing circuit, a signal amplifying circuit and a processor are sequentially connected. The utility model also provides a method for measuring the flow of the undetached hydraulic pipeline. By the method, the leakage of hydraulic oil in the disassembly process of pipelines can be effectively avoided, the hydraulic oil cannot be polluted, and the safe monitoring of the flow of hydraulic pipelines is ensured.
Description
Technical field
The utility model relates to hydraulic tubing monitoring field, in particular, relates to the flow monitoring device that a kind of puzzled body fluid is pressed pipeline.
Background technique
In some hydraulic transmissions and hydraulic conveyor; Often will monitor hydraulic flow rates and flow, thereby realize the monitoring to its technical parameter and state of the art, traditional method is that the serial connection flowmeter is realized in hydraulic system; And for a complete hydraulic system; Adopt this method in the later stage transformation, to dismantle, possibly cause the leakage of hydraulic oil, even can pollute hydraulic oil.
The model utility content
Mostly the utility model is rubber pipe in view of hydraulic oil pipe, provides a kind of puzzled body fluid to press the measuring device of pipeline flow.
A kind of puzzled body fluid of the utility model is pressed the flow monitoring device of pipeline; Carry out according to following step: comprise being installed on the outside pressure transducer of rubber oil hose; Said pressure transducer connects signal processing circuit, and signal processing circuit, signal amplification circuit are connected with processor successively.
Said signal processing circuit adopts bridge circuit or constant-current circuit.
Said signal amplification circuit adopts difference channel or instrument amplifier.
Integrated A/D converter of said processor or outside expansion A/D converter.
The method of measurement that the utility model provides a kind of puzzled body fluid to press pipeline flow can effectively be avoided the hydraulic fluid leak that causes in the pipeline unloading process, can not pollute hydraulic oil, has guaranteed safety monitoring hydraulic tubing flow.
Description of drawings
Fig. 1 is the utility model method of measurement schematic diagram;
Fig. 2 is the utility model method of measurement pressure surge monitoring principle;
Fig. 3 a and b are the single foil gauge signal processing circuits of the utility model method of measurement;
Fig. 4 is the utility model method of measurement time difference monitoring schematic representation.
Embodiment
The basic ideas of the utility model are: pressure surge is arranged in the hydraulic pressure transmission system usually; Utilize the sensor pressure surge; As shown in Figure 1, the sensor installation detected pressures fluctuation in 2 positions of AB of the certain distance interval D of hydraulic tubing is transferred to time of B from the A point through the monitoring pressure ripple; The distance B of 2 of AB can calculation flow rate v then, can calculated flow rate according to the internal diameter of hydraulic tubing.Therefore need the pressure surge of 2 of design apparatus monitorings, catch the time difference of transmission simultaneously, calculate flow rate corresponding and flow then.Fundamental comprises sensor, signal processing circuit, signal amplification circuit and processor four parts composition.
For in the externally measured pressure surge of rubber oil hose, adopt foil gauge 1 as sensor, the distortion of measuring oil pipe comes the indirect monitoring pressure surge; Monitoring principle such as Fig. 2, the direction stickup is long in cross-section, hydraulic tubing 2 upper edge is the foil gauge 1 of L, when hydraulic oil 3 pressure increase; Can compressing hydraulic tubing inwall, make pipe expansion, internal diameter R increases; Thereby the foil gauge length L that causes sticking on the hydraulic tubing surface is elongated; Make the resistance of foil gauge change, convert changes in resistance into voltage signal, realized monitoring the pipeline pressure fluctuation through subsequent conditioning circuit.
For foil gauge micro-strain; When measuring, need convert electrical signal into, the changing value of available two kinds of scheme measuring resistors, a kind of is to adopt bridge circuit the changes in resistance value to be converted into the variation of voltage; Shown in Fig. 3 a, the relation of output voltage and increased resistance value is suc as formula shown in (1); Another kind is the mode that steady current is provided to foil gauge, and like Fig. 3 b, when the resistance of foil gauge changes, the voltage of its two ends output also will change, shown in (2).
Because the relative change rate of ordinary circumstance foil gauge is less; The voltage signal that causes exporting is also relatively low, for the ease of extracting Pressure Fluctuation Signal, need the voltage signal of output be amplified; In above-mentioned signal processing circuit; Owing to adopted electric bridge and constant-current source circuit, can produce common mode signal, therefore when amplifying, need adopt difference channel with high cmrr or instrument amplifier to amplify just and can extract desirable signal.
Processor need be gathered Pressure Fluctuation Signal; Common integrated A/D converter or outside expansion A/D converter; Utilize two A/D ALT-CH alternate channels to gather the pressure surge situation of 2 of AB simultaneously, utilize the pressure surge time difference T of two passages of timer function calculating of processor simultaneously, as shown in Figure 4; Can calculation flow rate v according to the distance B of 2 of AB and time T, can calculated flow rate according to internal diameter of the pipeline R.
Claims (4)
1. the flow monitoring device of a puzzled body fluid pressure pipeline is characterized in that, comprises being installed on the outside pressure transducer of rubber oil hose, and said pressure transducer connects signal processing circuit, and signal processing circuit, signal amplification circuit are connected with processor successively.
2. a kind of puzzled body fluid according to claim 1 is pressed the flow monitoring device of pipeline, it is characterized in that, said signal processing circuit adopts bridge circuit or constant-current circuit.
3. a kind of puzzled body fluid according to claim 1 is pressed the flow monitoring device of pipeline, it is characterized in that, said signal amplification circuit adopts difference channel or instrument amplifier.
4. a kind of puzzled body fluid according to claim 1 is pressed the flow monitoring device of pipeline, it is characterized in that integrated A/D converter of said processor or outside expansion A/D converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220067395 CN202546276U (en) | 2012-02-28 | 2012-02-28 | Device for monitoring flow of undetached hydraulic pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220067395 CN202546276U (en) | 2012-02-28 | 2012-02-28 | Device for monitoring flow of undetached hydraulic pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202546276U true CN202546276U (en) | 2012-11-21 |
Family
ID=47166913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220067395 Expired - Lifetime CN202546276U (en) | 2012-02-28 | 2012-02-28 | Device for monitoring flow of undetached hydraulic pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202546276U (en) |
-
2012
- 2012-02-28 CN CN 201220067395 patent/CN202546276U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121121 |
|
| CX01 | Expiry of patent term |