CN206618776U - Flow rate measuring device based on ultrasonic reflections signal - Google Patents
Flow rate measuring device based on ultrasonic reflections signal Download PDFInfo
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- CN206618776U CN206618776U CN201720225252.3U CN201720225252U CN206618776U CN 206618776 U CN206618776 U CN 206618776U CN 201720225252 U CN201720225252 U CN 201720225252U CN 206618776 U CN206618776 U CN 206618776U
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Abstract
The utility model discloses a kind of flow rate measuring device based on ultrasonic reflections signal, including measuring staff, the measuring staff bottom is provided with the first probe launched with ultrasonic wave with receive capabilities, the first reflection probe and the second reflection probe are provided with around the first probe, first reflection probe and the second reflection probe are connected by connecting rod with measuring staff, and the first probe, the first reflection probe and the second reflection probe are connected with signal processing unit.A kind of flow rate measuring device based on ultrasonic reflections signal of the present utility model, have the advantages that planar flow velocity, measurement blind area are small, simultaneously, signal deteching circuit only needs to detect that the pulse-echo time, signal processing circuit is simple, and instrument cost is greatly reduced relative to supersonic Doppler measuring instrument.
Description
Technical field
The utility model is related to the flow rate measuring device based on ultrasonic reflections signal, belongs to flow velocity fields of measurement.
Background technology
There is more impurity in physical model current, easily obstruction Pitot tube water inlet pipe, while HWFA sensing elements can be damaged,
Therefore, Pitot tube and HWFA are generally unsuitable for physical model experiment.PIV and LDV are respectively provided with non-contact measurement advantage, PIV
The measurement of full field such as velocity field, concentration field, temperature field can be carried out, LDV can only carry out spot measurement.PIV and LDV measurement ranges have
Limit, arrange it is cumbersome, easily disturbed by impurity, it is difficult to the widespread adoption on physical model.Miniature propeller type current meter and ADV are usually used in
Physical model flow velocity is measured, and miniature propeller type current meter is easy to operate, cheap, while measurement accuracy is higher, but it belongs to and connect
Touch is measured, and disturbs larger to fluidised form, and there is measurement blind area, and flow velocity can just go to more than initial velocity rotation oar and measure,
Flow velocity compared with it is small when measurement error it is big, the instrument can not measure flow direction.ADV measurement accuracy is high, can measure simultaneously three-dimensional point flow velocity and
Flow direction, due to ultrasonic wave, spread speed is inconsistent in air and current, it is necessary to which transmitting receiving transducer is placed in into underwater ability
Accurately measured, therefore, there is certain interference to fluidised form, and its is expensive, it is difficult to large-scale application.Therefore, compel to be essential
The flow velocity new method of measurement accuracy and operability is taken into account simultaneously.
Utility model content
Utility model purpose：In order to overcome the deficiencies in the prior art, the utility model provides a kind of based on ultrasound
The flow rate measuring device of wave reflection signal, has the advantages that planar flow velocity, measurement blind area are small, meanwhile, signal deteching circuit
The pulse-echo time is only needed to detect that, signal processing circuit is simple, and instrument cost is relative to supersonic Doppler measuring instrument significantly
Reduction.
Technical scheme：In order to solve the above technical problems, a kind of flow velocity based on ultrasonic reflections signal of the present utility model
Measurement apparatus, including measuring staff, the measuring staff bottom are provided with to launch with ultrasonic wave and popped one's head in the first of receive capabilities, first
Be provided with the first reflection probe and the second reflection probe around probe, the first reflection probe and the second reflection probe by connecting rod with
Measuring staff is connected, and the first probe is connected with signal processing unit.
Preferably, the bottom of first probe, the first reflection probe and the second reflection probe is cylinder tangent plane, the
The cylinder tangent plane of one probe, the first reflection probe and the second reflection probe is located in same level.
Preferably, first reflection probe is identical with the distance that the second reflection probe distance first is popped one's head in.
Preferably, the measuring staff is hollow cylinder, a diameter of 6~8mm, material is stainless steel.
Beneficial effect：Flow rate measuring device of the present utility model based on ultrasonic reflections signal, it is ingenious in design, first
The first reflection probe and the second reflection probe with reflectance ultrasound wave energy are set around probe, by ultrasonic reflections to the
One probe, signal processing unit only handles the pulse-echo time, and signal processing circuit unit is simple, and cost is low；This practicality is new
The measuring method of type, it is thus only necessary to the distance of prior measurement apparatus, the time detected using signal processing unit, measurement accuracy
Height, has the advantages that planar flow velocity, measurement blind area are small.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is probe plane perspective view.
Fig. 3 is flow velocity measuring principle figure.
Embodiment
As shown in figure 1, a kind of flow rate measuring device based on ultrasonic reflections signal of the present utility model, including measuring staff 2,
The measuring staff 2 is hollow cylinder, and a diameter of 6~8mm, material is stainless steel, and the bottom of measuring staff 2 is provided with ultrasound
Ripple launches the first probe 4 with receive capabilities, and the first reflection probe 3 and the second reflection probe 5 are provided with around the first probe 4,
First reflection probe 3 and the second reflection probe 5 are connected by connecting rod with measuring staff 2, and the first probe 4 connects with signal processing unit 1
Connect, signal processing unit 1 includes ultrasonic signal conditioning unit and signal detection and transmitter unit, signal detection and transmitter unit
Occur ultrasonic waves for the probe of control first 4 and start ultrasonic wave and time that timing and the reception of the first probe 4 are reflected, warp
Cross ultrasonic signal conditioning unit and handle the time obtained required for the first probe 4 generation ultrasonic wave to reception ultrasonic wave.
In the utility model, the bottom of first 4, first reflection probe 3 of probe and the second reflection probe 5 is circle
The cylinder tangent plane of post tangent plane, first the 4, first reflection probe 3 of probe and the second reflection probe 5 is located in same level, described
First reflection probe 3 is identical with the distance of the distance first of the second reflection probe 5 probe 4, is Δ s.
A kind of measuring method of the above-mentioned flow rate measuring device based on ultrasonic reflections signal, comprises the following steps：
1) the first probe 4 is arranged on the lower section of measuring staff 2, the first reflection probe 3 and the second reflection probe 5 are pacified by connecting rod
On measuring staff 2, first the 4, first reflection probe 3 of probe and the second reflection probe 5 are connected with the signal of signal processing unit 1, the
One reflection probe 3 and the second reflection probe 5 and the distance of the first probe 4 are Δ s；
2) certain capacity current to be measured are contained using beaker, measurement apparatus is placed in static current, obtain ultrasonic wave in water
Spread speed in stream；
Wherein Δ t is the time required to the first probe 4 is transmitted into the reception reflectance ultrasound ripple of the first reflection probe 3；
3) measurement apparatus is arranged in flow velocity tested point, first probe of the detection of signal processing unit 14 launches ultrasonic waves to connecing
The time for receiving the reflectance ultrasound ripple of the first reflection probe 3 is Δ t1, signal processing unit 1 detection first probe 4 launch ultrasonic waves arrive
The time for receiving the reflectance ultrasound ripple of the second reflection probe 5 is Δ t2；vxIt is flow velocity, the v of flow rate of water flow in X directionyIt is flow rate of water flow
Along the flow velocity of Y-direction, X-direction is that the direction of the first reflection probe 3 is pointed at the center of the first probe 4, and Y-direction is the first probe 4
Center point to the second reflection probe 5 direction, as shown in Figure 2；
Then corresponding to point velocity is：
Described above is only preferred embodiment of the present utility model, it should be pointed out that：For the common skill of the art
For art personnel, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these improve and
Retouching also should be regarded as protection domain of the present utility model.
Claims (4)
1. the flow rate measuring device based on ultrasonic reflections signal, it is characterised in that：Including measuring staff, the measuring staff bottom is provided with
Launch the first probe with receive capabilities with ultrasonic wave, provided with the first reflection probe and the second reflection spy around the first probe
Head, the first reflection probe and the second reflection probe are connected by connecting rod with measuring staff, and the first probe is connected with signal processing unit.
2. the flow rate measuring device according to claim 1 based on ultrasonic reflections signal, it is characterised in that：Described first
The bottom of probe, the first reflection probe and the second reflection probe is cylinder tangent plane, the first probe, the first reflection probe and second
The cylinder tangent plane of reflection probe is located in same level.
3. the flow rate measuring device according to claim 2 based on ultrasonic reflections signal, it is characterised in that：Described first
Reflection probe is identical with the distance that the second reflection probe distance first is popped one's head in.
4. the flow rate measuring device according to claim 1 based on ultrasonic reflections signal, it is characterised in that：The measuring staff
For hollow cylinder, a diameter of 6~8mm, material is stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720225252.3U CN206618776U (en) | 2017-03-09 | 2017-03-09 | Flow rate measuring device based on ultrasonic reflections signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720225252.3U CN206618776U (en) | 2017-03-09 | 2017-03-09 | Flow rate measuring device based on ultrasonic reflections signal |
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| Publication Number | Publication Date |
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| CN206618776U true CN206618776U (en) | 2017-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720225252.3U Active CN206618776U (en) | 2017-03-09 | 2017-03-09 | Flow rate measuring device based on ultrasonic reflections signal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106841674A (en) * | 2017-03-09 | 2017-06-13 | 河海大学 | Flow rate measuring device and measuring method based on ultrasonic reflections signal |
-
2017
- 2017-03-09 CN CN201720225252.3U patent/CN206618776U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106841674A (en) * | 2017-03-09 | 2017-06-13 | 河海大学 | Flow rate measuring device and measuring method based on ultrasonic reflections signal |
| CN106841674B (en) * | 2017-03-09 | 2023-10-24 | 河海大学 | Flow velocity measuring device and method based on ultrasonic reflection signals |
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