CN204115785U - A kind of solid flow sensor - Google Patents
A kind of solid flow sensor Download PDFInfo
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- CN204115785U CN204115785U CN201420536198.0U CN201420536198U CN204115785U CN 204115785 U CN204115785 U CN 204115785U CN 201420536198 U CN201420536198 U CN 201420536198U CN 204115785 U CN204115785 U CN 204115785U
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Abstract
The utility model relates to a kind of solid flow sensor, its structure includes detection sensing device and sensor detection circuit, detection sensing device includes circular tube shaped inner core (1), sensing coil (2) and sensor outer housing (4), circular tube shaped inner core (1) includes the annular recess (11) at middle part and the circular support portion (12) at two ends, axis along described circular tube shaped inner core (1) is provided with material channel (13), and sensing coil (2) is around in annular recess (11); Sensor outer housing (4) is placed on the outside of circular tube shaped inner core (1) and two ends are stuck on two circular support portions (12), and sensor outer housing (3) is fixed by multiple screw (5) with circular support portion (12); The lead-in wire of sensing coil (2) is connected on sensor detection circuit through the through hole on sensor outer housing (4) sidewall.Sensor measurement of the present utility model has real-time and accuracy is high, manufactures low processing cost, long service life, is applicable to producing in enormous quantities.
Description
Technical field
The utility model relates to detection field, is related specifically to a kind of sensor detecting solid granule flow or pressed powder flow, and all kinds of magnetic permeabilities be applicable under detection freely falling body mode of movement are greater than the material of air.
Background technology
In solid material transport process, solid flow sensor is for measuring the real-time traffic of material.Detect solid materiel flux in prior art and mostly adopt weighing method, volumetric method or microwave method.Wherein, adopt the sensor of weighing method, measurement delay is comparatively large, and is easily subject to the impact vibrated in material transport process, so can not reflect the actual flow of current material timely and effectively, is not suitable for control accuracy and requires higher occasion.Adopt the sensor of volumetric method, mobilizable mechanical measurement parts are all equipped with in its inside, and these mechanical parts in use easily wear and tear, and therefore the life-span is far away from non-contact measurement mode, and these wearing and tearing can cause the remarkable reduction of measuring accuracy.And adopting the solid flow sensor of microwave method, its principle is based on Doppler effect, technical sophistication and cost of development is high.
Summary of the invention
The purpose of this utility model is the deficiency overcoming the existence of above-mentioned prior art, provides the detection sensing device on a kind of novel solid flow sensor, particularly this solid flow sensor.Solid flow sensor of the present utility model is suitable for the solid flow monitoring under freely falling body mode of movement, as the contactless flow detection mode of one, can not have an impact to material flow, not produce mechanical loss, and the conversion of analog quantity and digital quantity can be carried out in real time.
In order to reach foregoing invention object, the technical scheme that the utility model provides is as follows:
A kind of solid flow sensor, its structure includes detection sensing device and sensor detection circuit, detection sensing device is connected to sensor detection circuit by lead-in wire, it is characterized in that, described detection sensing device includes circular tube shaped inner core, sensing coil and sensor outer housing, the circular tube shaped inner core cut by wear-resisting column type nylon bar entirety structurally includes the annular recess at middle part and the circular support portion at two ends, and the axis along described circular tube shaped inner core is provided with material channel; Described sensing coil is around in described annular recess, the winding method of sensing coil be individual layer closely arrange around, have one deck screen layer in the outer wrap of sensing coil; It is columnar structured that described sensor outer housing thin aluminum sheet is made, this columnar structured internal diameter equals the external diameter in described circular support portion, columnar structuredly be placed on the outside of circular tube shaped inner core and two ends are stuck in two circular support portions, described sensor outer housing and circular support portion are fixed by multiple screw; The sidewall of sensor outer housing is provided with a through hole, and the lead-in wire of sensing coil is connected on described sensor detection circuit through described through hole.
In solid flow sensor of the present utility model, the gap between the outer wall and the inwall of sensor outer housing of described screen layer is filled with Embedding Material, and this Embedding Material is polyurethane material.
In solid flow sensor of the present utility model, the screen layer be made up of permalloy sheet is close on described sensing coil.
In solid flow sensor of the present utility model, the through hole of described sensor outer housing is provided with a rubber sleeve gasket, described lead-in wire by described rubber sleeve gasket with through the through hole of sensor outer housing.
In solid flow sensor of the present utility model, described sensor detection circuit is the circuit that analog quantity is converted to digital quantity.
Based on technique scheme, solid flow sensor of the present utility model compared with prior art has following technological merit:
The comprehensive existing flow detection technical characterstic of the utility model, the solid material being greater than air for magnetic permeability devises a kind of solid flow sensor adopted based on power transformation sense principle.The solid flow that this sensor is applicable under freely falling body mode of movement detects, and be a kind of contactless flow detection mode, and its inside does not exist choked flow components and parts, therefore almost mechanical loss, long service life, also can not have an impact to material flow.Adopt inductance measuring amount to obtain flow information, real-time and accuracy high.In addition, this solid flow sensor construction is simple, manufactures low processing cost, is applicable to producing in enormous quantities.
Accompanying drawing explanation
Fig. 1 is the structural representation detecting sensing device in a kind of solid flow sensor of the utility model.
Fig. 2 is the sectional structure schematic diagram detecting sensing device in a kind of solid flow sensor of the utility model.
Fig. 3 is the measuring principle schematic diagram of a kind of solid flow sensor of the utility model.
Embodiment
We are described in further detail solid flow sensor of the present utility model with concrete embodiment by reference to the accompanying drawings below; understand its structure composition and workflow with more cheer and bright, but protection domain of the present utility model can not be limited with this.
The primary structure of solid flow sensor of the present utility model includes detection sensing device and sensor detection circuit, and detection sensing device is connected to sensor detection circuit by lead-in wire.Acquisition sensor device is the main exploring block of this sensor, and sensor detection circuit is as the change-over circuit of analog quantity and digital quantity.The solid flow that acquisition sensor of the present utility model is applicable under freely falling body mode of movement detects, because it is contactless flow detection mode, inside does not exist choked flow components and parts, and basic mechanical loss, also can not have an impact to material flow.
Design concept of the present utility model obtains the actual flow information of material based on the variable quantity detecting inductance.The sensing part of sensor, its essence is a coil around the even coiling of determinand stream bundle.When not having material through sensor, the magnetic permeability of coil inside is similar to the magnetic permeability of air.When existence flows through the material a fluid stream of sensor, the magnetic permeability of coil inside can increase along with the increase of mass flow.
If set coil turn as
, coil inside magnetic permeability be
, coiling sectional area be
, coil length be
, then according to the definition of inductance:
From above formula,
when constant, the change of magnetic permeability can cause the change of winding inductance quantity.And the change of this magnetic permeability, be again closely-related with the change of current mass flow.Therefore those magnetic permeabilities are greater than to the solid material of air, the mode that just measuring coil inductance value can be adopted to change detects the real-time traffic of material.
As core building block of the present utility model, as depicted in figs. 1 and 2, described detection sensing device includes circular tube shaped inner core 1, sensing coil 2 and sensor outer housing 4.Circular tube shaped inner core 1 structurally includes the annular recess 11 at middle part and the circular support portion 12 at two ends, and the axis along described circular tube shaped inner core 1 is provided with material channel 13.Circular tube shaped inner core 1 is cut by wear-resisting column type nylon bar entirety to form, and described annular recess 11 is the centre positions being positioned at circular tube shaped inner core 1, is also that this groove is used for the coiling of sensor sensing coil by cutting the smooth groove of of making.
Above-mentioned sensing coil 2 is around in described annular recess 11, the winding method of sensing coil 2 be individual layer closely arrange around, have one deck screen layer 3 in the outer wrap of sensing coil.In order to prevent electromagnetic interference (EMI) on the impact of flow detection, one deck screen layer 3 must be wrapped up in sensing coil outside, this screen layer 3 is made up of permalloy sheet, permalloy sheet is close on described sensing coil 2, and sensing coil 2 reduces space between circle and circle as far as possible to improve measuring accuracy when coiling.
Above-mentioned sensor outer housing 4 is columnar structured for what be made up of thin aluminum sheet, this columnar structured internal diameter equals the external diameter in described circular support portion 12, columnar structuredly be placed on the outside of circular tube shaped inner core 1 and two ends are stuck in two circular support portions 12, described sensor outer housing 3 is fixed by multiple screw 5 with circular support portion 12.In actual installation, need to configure upper and lower flange according to particular requirement in addition and fix for the installation of whole sensor, and two circular support portions 12 just serve identical effect.
The sidewall of sensor outer housing 4 is provided with a through hole, and the lead-in wire of sensing coil 2 is connected on described sensor detection circuit through described through hole.The through hole of described sensor outer housing 4 is provided with a rubber sleeve gasket 6, described lead-in wire by described rubber sleeve gasket 6 with through the through hole of sensor outer housing 4.In addition, in order to strengthen the physical strength of whole sensor, the gap between the outer wall and the inwall of sensor outer housing 4 of described screen layer 3 is filled with Embedding Material 7, and this Embedding Material 7 is polyurethane material.Flow sensor, in addition with testing circuit, can carry out real-time digitizing conversion to the analog quantity measured, can dock with whole TT&C system easily.The testing circuit of sensor is the circuit that analog quantity is converted to digital quantity, is a kind of common circuit.
As Fig. 3 reflects the basic functional principle of the utility model sensor, when flowing through circular tube shaped inner core 1 without solid material, the magnetic permeability of sensing coil 2 inside approximates air.When there being material to flow through circular tube shaped inner core 1, the magnetic permeability of sensing coil 2 inside changes along with the change of solid flow.When the parameter such as the number of turn of sensing coil 2 is determined, the change of this magnetic permeability finally can be changed by the inductance value of sensing coil 2 and showed, and namely the inductance value of sensing coil 2 changes the real-time traffic that can reflect solid material.Just can pass through custom-designed sensor detection circuit thus, obtain the inductance value changing value of sensing coil 2, finally realize the detection to solid materiel flux.
In sum; the embodiment of solid flow sensor of the present utility model above; its protection domain is not only confined to structure composition that embodiment enumerates and connected mode, also comprises other any apparent conversion and substituting to those skilled in the art.
Claims (5)
1. a solid flow sensor, its structure includes detection sensing device and sensor detection circuit, detection sensing device is connected to sensor detection circuit by lead-in wire, it is characterized in that, described detection sensing device includes circular tube shaped inner core (1), sensing coil (2) and sensor outer housing (4), the circular tube shaped inner core (1) cut by wear-resisting column type nylon bar entirety structurally includes the annular recess (11) at middle part and the circular support portion (12) at two ends, and the axis along described circular tube shaped inner core (1) is provided with material channel (13); Described sensing coil (2) is around in described annular recess (11), the winding method of sensing coil (2) be individual layer closely arrange around, have one deck screen layer (3) in the outer wrap of sensing coil; It is columnar structured that described sensor outer housing (4) thin aluminum sheet is made, this columnar structured internal diameter equals the external diameter of described circular support portion (12), columnar structuredly be placed on the outside of circular tube shaped inner core (1) and two ends are stuck on two circular support portions (12), described sensor outer housing (3) is fixed by multiple screw (5) with circular support portion (12); The sidewall of sensor outer housing (4) is provided with a through hole, and the lead-in wire of sensing coil (2) is connected on described sensor detection circuit through described through hole.
2. a kind of solid flow sensor according to claim 1, it is characterized in that, gap between the outer wall and the inwall of sensor outer housing (4) of described screen layer (3) is filled with Embedding Material (7), and this Embedding Material (7) is polyurethane material.
3. a kind of solid flow sensor according to claim 1, is characterized in that, the screen layer (3) be made up of permalloy sheet is close on described sensing coil (2).
4. a kind of solid flow sensor according to claim 1, it is characterized in that, the through hole of described sensor outer housing (4) is provided with a rubber sleeve gasket (6), described lead-in wire by described rubber sleeve gasket (6) with through the through hole of sensor outer housing (4).
5. a kind of solid flow sensor according to claim 1, is characterized in that, described sensor detection circuit is the circuit that analog quantity is converted to digital quantity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420536198.0U CN204115785U (en) | 2014-09-18 | 2014-09-18 | A kind of solid flow sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420536198.0U CN204115785U (en) | 2014-09-18 | 2014-09-18 | A kind of solid flow sensor |
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| Publication Number | Publication Date |
|---|---|
| CN204115785U true CN204115785U (en) | 2015-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420536198.0U Active CN204115785U (en) | 2014-09-18 | 2014-09-18 | A kind of solid flow sensor |
Country Status (1)
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|---|---|
| CN (1) | CN204115785U (en) |
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2014
- 2014-09-18 CN CN201420536198.0U patent/CN204115785U/en active Active
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