CN2716817Y

CN2716817Y - Wireless liquid level measuring device

Info

Publication number: CN2716817Y
Application number: CN 200420042122
Authority: CN
Inventors: 刘晓辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-07-02
Filing date: 2004-07-02
Publication date: 2005-08-10
Anticipated expiration: 2014-07-02

Abstract

The utility model relates to a level measuring device, especially a wireless formula liquid level measuring device. The device comprises an inner cylinder fixed along the height direction of the container, height marking information extending the height of the container on the inner cylinder, a magnetic floater positioned relative to the inner cylinder, and a marking information reading device in the inner cylinder, wherein the marking information reading device is provided with a magnetic body, the magnetic body is magnetically repelled with the corresponding surface of the magnetic floater, and the marking information reading device is provided with a signal output port, and is characterized in that: the signal output port is a radio frequency wireless transmitting circuit.

Description

A kind of wireless type liquid level emasuring device

Affiliated technical field: the utility model relates to a kind of article position measuring device, particularly a kind of wireless type liquid level emasuring device.

Background technology: the utility model people discloses a kind of level measuring method in 200410026069.8 patents, it is by placing the float in the container to form with the measurement mechanism that the measurement float moves, magnetic material on the float, prolong the container height direction at container and be fixed with inner core, the relative inner core of float location, interior tube bottom sealing, inner core prolongs the container height design height mark information, the reading device that height mark information is arranged in the inner core, signal output interface is arranged in the reading device, when float changes up and down with liquid level, float drives reading device and moves up and down, reading device reads the container height label information constantly, and be that electric signal is outwards exported by signal output interface with the height mark information translation, by transmitter the liquid level signal that signal output interface sends is sent to the pulpit again, process and display by control.

Summary of the invention: the purpose of this utility model provides a kind of wireless type liquid level emasuring device, and it utilizes 200410026069.8 level measuring methods that provide to provide a kind of realization on-site signal that need not any circuit and transmits at a distance.

The purpose of this utility model is to realize like this, a kind of wireless type liquid level emasuring device, it by prolong the height mark information of container height of prolonging on the fixing inner core of container height direction, the inner core, the magnetic float, the label information reading device in the inner core of inner core location are formed relatively, the label information reading device body that is magnetic, corresponding the magnetic in it and magnetic float is repelled each other, the label information reading device has signal output, it is characterized in that: signal output is the wireless radiofrequency radiating circuit.

The utility model has the advantages that: the reading device that reads elevation information, constantly read the height mark information on the inner core and send liquid level signal with the wireless radiofrequency radiating circuit, send liquid level signal by the wireless radiofrequency radiating circuit and realize that the non-electricity of liquid level signal transmits at a distance, it is not only simple in structure, and safe and reliable, be fit to the oil tank level safety management.

Description of drawings:

The utility model is described in further detail below in conjunction with the embodiment accompanying drawing:

Fig. 1 is the utility model embodiment 1 structural representation;

Fig. 2 is the inner core sectional view;

Fig. 3 is the inner core sectional view;

Fig. 4 is the reading device structural drawing;

Fig. 5 is the utility model embodiment 2 structural representations;

Fig. 6 is the reading device circuit theory diagrams.

Among the figure, 1, container; 2, magnetic float; 3, inner core; 4, reading device; 5, height mark information; 6, liquid; 7, liquid level; 8, over cap; 9, flange; 10, battery; 11, protection tube; 12, heat-insulation layer; 13, internal layer; 14, guiding mechanism; 15, housing; 16, wireless radiofrequency radiating circuit; 17, light guide plate; 18, photoelectric receiving tube; 19, non-magnetic shield; 20, scatterer; 21, reflective inclined-plane; 22, lighting source; 23, guide lugs; 24, guide pole; 25, lower magnet; 26, upper magnet; 27, web member; 28, control panel; 29, read circuit.

Embodiment: as shown in Figure 1, the vertical fixing up and down of prolonging container 1 in the container 1 has inner core 3, the inner core 3 outer magnetic floats 2 that are with; Magnetic float 2 floats on the position of the top liquid level 7 of liquid 6 in the container 1.Height mark information 5 is arranged on the inner core 3, and height mark information 5 can be to the height mark information 5 that goes up down by 8421 establishments; Also can be the height mark information 5 by gray encoding, its scale division value can be that 1mm, 1cm make arbitrarily.In order to read the height mark information 5 in the inner core 3, the reading device 4 that reads these height mark information 5 is arranged in inner core 3.Reading device 4 positions, location are by upper magnet 26 on the housing 15 of

reading device

4 and 25 location of the lower magnet on the magnetic float 2; Upper magnet 26 repels each other with lower magnet 25 corresponding surface magnetic poles.As opposite face all is the s utmost point, and reading device 4 is stable like this remains on fixing position, magnetic float 2 tops.Liquid injects, and liquid level rises, move on the magnetic float 2, reading device 4 with on move.Fluid discharge, liquid level descends, and magnetic float 2 moves down, and reading device 4 moves down thereupon.Reading device 4 constantly reads the height mark information 5 on the inner core and passes through wireless radiofrequency radiating circuit 16 to the pulpit, realizes that the non-electricity of liquid level signal transmits at a distance.

Insert inner core 3 lower seal in the container 1, the top is fixing by the non-magnetic shield 19 and the over cap 8 at flange 9, container 1 top, can well seal again so that liquid level signal reliably sends.

As shown in Figure 2, in order to adapt to the measurement of temperature of high-temp liquid, make reading device 4 that a temperature space that does not influence performance be arranged, inner core 3 is made of protection tube 11, heat-insulation layer 12, internal layer 13, and heat-insulation layer 12 interconnects fixing between protection tube 11 and internal layer 13.

Protection tube 11 can be (stainless steel, glass, PVC etc.) but not only can be anticorrosion but also the material of heatproof; Heat-insulation layer 12 can be thermal insulation coatings or insulation material; Thermal insulation coatings can be applied on internal layer 13 outer walls; Insulation material can be filled between protection tube 11 and the internal layer 13.Internal layer 13 is made up of the smooth light penetrating object pipeline of inside surface, and height mark information 5 is arranged on the interior conduit.Certainly, when the liquid level temperature is high, can not adopt monotubular structure or double-barrel structure yet.

As shown in Figure 3, can read height mark information 5 accurately in order to make the reading device 4 that floats on inner core 3, guiding mechanism 14 is arranged in the inner core 3, when reading device 4 moved up and down like this, the read head of code channel correspondence can keep good distance.

A kind of enforcement of reading device 4 is the modes that adopt Fig. 4, it comprises a housing 15, light guide plate 17, reflective inclined-plane 21, photoelectric receiving tube 18, lighting source 22 in the housing 15, read circuit 29, battery 10, wireless radiofrequency radiating circuit 16, scatterer 20, permanent magnet 26 and form, reading circuit 29 is the microcontroller chips that have multi-channel a/d converter, read on the interface of circuit 29 and be electrically connected with lighting source 22 and photoelectric receiving tube 18, lighting source 22 is used for sending light to code channel; Photoelectric receiving tube 18 is used to receive the code channel light intensity, reads circuit 29 and lighting source 22 and photoelectric receiving tube 18 by battery 10 power supplies.

Photoelectric receiving tube 18, lighting source 22 are positioned at the lower floor of circuit board.

In the lower end of circuit board light guide plate 17 is arranged, there is scatterer 20 center of light guide plate 17, and scatterer 20 is over against lighting source 22.

Have on the periphery of light guide plate 17 and the corresponding reflective inclined-plane 21 of code channel, plate reflectance coating on the reflective inclined-plane 21; The photoelectric receiving tube 18 that receives the code channel optical information is over against reflective inclined-plane 21; Permanent magnet 26 is arranged below light guide plate 17.Battery 10 is fixed on the circuit board.

Lighting source 22 is LED.

During work, it is luminous to read circuit 29 control lighting sources 22, illumination scatterer 20, send the uniform light of all directions by scatterer 20 to light guide plate 17 peripheries, each code channel on the illumination inner core, as a certain code channel is white or yellow, will reflect the light from light guide plate 17, and reflected light enters on light guide plate 17 back reflexes to corresponding code channel by reflective inclined-plane 21 the photoelectric receiving tube 18 and receives.Read the signal that circuit 29 reads photoelectric receiving tube 18, according to the size of signal, obtaining corresponding code channel is 1 or 0 (black or white, Huang), finally obtains liquid level information according to 0,1 of these all code channels of section.Obtain by reading circuit 29 liquid level information being passed through wireless radiofrequency radiating circuit 16 to the pulpit again after the liquid level information.

Whole reading device 4 guaranteed work several years by battery 10 power supplies in order to make battery 10 power-on times, and reading circuit 29 is with intermittent work mode.Reading device 4 has guiding mechanism 14, so that cooperate the location with inner core 3, realizes steady rise and fall.

Fig. 5 is another kind of embodiment, it is fit to higher container, inner core is fixedly connected by web member 27 by more piece, because web member 27 can make inner core 3 outer walls irregular, influence magnetic float 2 and prolong inner core 3 and move up and down, the endoporus of magnetic float 2 can be more many greatly than inner core 3 external diameters like this, for magnetic float 2 is moved up and down steadily, prolong inner core 3 both sides and increase by two guide poles 24, it is fixing stretching with container up and down that magnetic float 2 both sides 23, two guide poles 24 of two guide lugs of extension pass two guide lugs, 23 backs.

Fig. 6 has provided the circuit diagram of reading device, and reading circuit 29 is the microcontroller chips that have multi-channel a/d converter, and lighting source 22 is LED, and photoelectric receiving tube 18 is 3DU, the luminous and receiving circuit that each code channel has pair of LEDs and 3DU to constitute.In order to save power consumption, only when work, the I/O eloquence of control is low level for lighting source 22 and photoelectric receiving tube 18, makes LED and 3DU work.The structure difference of Fig. 6 and Fig. 4 is that all there is illuminating circuit on each road, and it can be used for each road code channel employing and transmits and receives the collection code channel information.Measuring the range increase in order to make, is 16m as measuring range, precision 1mm, and its code channel needs 14 roads, and the A/D of microcontroller chip conversion mouth does not reach requirement like this.In order to make limited A/D conversion mouth reach its measurement requirement, can be by the address mouth work of the different luminous and receiving circuit of I/O mouth control, has only the luminous of corresponding address and receiving circuit work, the A/D conversion eloquence that is electrically connected with it is carried out data acquisition to it, can effectively overcome single little process chip A/D conversion mouthful few problem like this.

Claims

1, a kind of wireless type liquid level emasuring device, it by prolong the height mark information of container height of prolonging on the fixing inner core of container height direction, the inner core, the magnetic float, the label information reading device in the inner core of inner core location are formed relatively, the label information reading device body that is magnetic, corresponding the magnetic in it and magnetic float is repelled each other, the label information reading device has signal output, it is characterized in that: signal output is the wireless radiofrequency radiating circuit.

2, a kind of wireless type liquid level emasuring device according to claim 1, it is characterized in that: reading device (4) comprises a housing (15), read circuit (29) in the housing (15), battery (10), wireless radiofrequency radiating circuit (16), permanent magnet (26) is formed, reading circuit (29) is the microcontroller chip that has multi-channel a/d converter, read on the interface of circuit (29) and be electrically connected with lighting source (22), photoelectric receiving tube (18) and wireless radiofrequency radiating circuit (16) read circuit (29), lighting source (22), photoelectric receiving tube (18) and wireless radiofrequency radiating circuit (30) are electrically connected with battery (10).

3, a kind of wireless type liquid level emasuring device according to claim 1 is characterized in that: inner core (3) is made of protection tube (11), heat-insulation layer (12), internal layer (13), and heat-insulation layer (12) interconnects fixing between protection tube (11) and internal layer (13).

4, a kind of wireless type liquid level emasuring device according to claim 1, it is characterized in that: lighting source (22) is LED, photoelectric receiving tube (18) is 3DU.

5, a kind of wireless type liquid level emasuring device according to claim 1 is characterized in that: guiding mechanism (14) is arranged in the inner core (3).

6, a kind of wireless type liquid level emasuring device according to claim 1, it is characterized in that: heat-insulation layer (12) can be a thermal insulation coatings.