CN2667479Y

CN2667479Y - Infrared control non-contact pressure gage

Info

Publication number: CN2667479Y
Application number: CN 200320111101
Authority: CN
Inventors: 马宝来; 田春秋
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-10-24
Filing date: 2003-10-24
Publication date: 2004-12-29
Anticipated expiration: 2013-10-24

Abstract

The utility model discloses an infrared controlled pressure meter without contact point. Meter tray is fixedly provided with a groove-shaped bracket which has a knob connected with a high and a low voltage presetting pointers; back faces of the high and the low voltage resetting pointers are respectively provided with corresponding infrared emitting pipes at the two ends of an insulating plate and infrared receiving pipes in a shielding cover with through holes which are connected with a control circuit arranged in the groove-shaped bracket through the penetration of a lead through the lead central supporting cover; the pressure pointers are provided with baffles. The utility model is characterized in simple structure, stable and reliable precision.

Description

Infrared ray control contactless tensimeter

Technical field

The utility model relates to and a kind ofly is used for measuring and for vacuum, the temperature of liquid, gas or the pressure of various pipelines of control and container, realizes the remotely-controlled infrared ray control of on-the-spot indication contactless tensimeter.

Background technology

At present, the mechanical compression table of domestic production, vacuum meter, thermometer, its gauge tap all is switch with mechanical contacts.And the switch of this kind structure, easily producing electric spark, sensitivity is low, and serviceable life is short, easy oxidation in contact and corrosion, problems such as fearness is vibrated, switching error is big, poor reliability.For addressing the above problem, be CN2098680U as the publication number of Chinese patent, disclose employing Hall magnetosensitive integrated switch in " contactless electro connecting pressure gauge " technology, and kept original structure.This switch is installed in the upper and lower bound of instrument respectively and sets on the pointer.Relative prior art has replaced the switch of existing instrument.Eliminate the defective that has the contact easily to produce electric spark, can be used for the out of use inflammable and explosive special occasions that waits of existing instrument.Also there are the following problems but simultaneously:

1,, the pressure of pointer is brought influence to the index degree because pointer when rising, overcome the moment of torsion of hairspring, pivoted arm; When pointer descends, the effect that pushes away before again pointer being applied, influential to the index precision equally.

2, owing to adopted hall magnetic component, in limited space, make its with electronic component between line in dish is connected extremely inconveniently, also might run into moving-member, so that have influence on precision, also be unfavorable for installation simultaneously, debug.

3, owing to adopted Hall magnetosensitive integrated switch, increased the whole cost of instrument.

4, when the work starting stage, permanent magnetism and pivoted arm are close to the setting pointer under the effect of hairspring power, make Hall magnetosensitive integrated switch be in the triggering and conducting state, and load gets electric work, and pointer rises; In the middle of rising to lower limit that tensimeter sets, lower limit, system pressure during a certain position, has a power failure for various reasons, incoming call again at once, and at this moment the gauge hand position is constant substantially, and at this moment the permanent magnetism of pivoted arm is not promptly in the lower position, again not at upper limit position.At this moment IC circuit ₃3 pin " 1 ", " 0 " of a are just uncertain.And do not have regularity, pressure source perhaps may be the state that opens or closes.

5, this instrument can't be seen clearly and learn that tensimeter is to be in low-pressure state when working at night, or high pressure conditions.

The utility model content

The purpose of this utility model is for solving the problem that above-mentioned technology exists, and a kind of infrared ray control contactless tensimeter is provided, and, high pressure low by infrared control set pointer, realize the contactless state, have simple in structurely, control accuracy is stable, reliable, is not subjected to external influence.

For achieving the above object, technical solution of the present utility model is finished like this:

A kind of infrared ray control contactless tensimeter, it is to fix a troffer on dial plate, connect high and low pressure by setting knob on it and set pointer, the insulcrete two ends that are provided with respectively at the back side of high and low pressure setting pointer, be provided with gap and corresponding infrared transmitting tube respectively and be installed in the interior infrared receiving tube of bell housing that has through hole, pass by lead and to be provided with lead center hanging sleeve and to be connected on the control circuit that sets firmly in the troffer, be positioned at that be provided with on the pressure pointer can be by the baffle plate in infrared transmitting tube and infrared receiving tube gap.

The technical program also comprises:

The both sides of described troffer have the hole clipping that is used to install control circuit.

Described red, the green light emitting diode that is used for the display working condition at night that on troffer, is provided with.

Described control circuit is by triode T ₁, T ₂Collector connect resistance R respectively ₂, R ₃, light emitting diode D ₃, D ₆Positive pole and infrared receiving tube D ₄, D ₅Positive pole, D ₄, D ₅Negative pole is connected to triode T respectively ₁, T ₂Base stage and be connected to capacitor C, T ₂Base stage connects a resistance R ₄, T ₁, T ₂Emitter connect the rest-set flip-flop that negative pole end is formed, by T ₂Collector pass through resistance R ₅Be connected to triode T ₃Base stage, T ₃Collector be connected to diode D ₇Positive pole, T ₃Emitter connects the amplifier that negative pole is formed, by the resistance R that connects ₁String has the D of the infrared transmitting tube of 2 parallel connections ₁, D ₂The transmitting illuminant circuit formed of positive pole.

Characteristics and effect that the utility model compared with prior art has are: the structure of this instrument is provided with a catch as thin as a wafer at infrared transmitting tube and infrared receiving tube intermediary movements on the pressure pointer, and the precision of instrument is not affected.And infrared emission, receiving tube and control circuit board be installed in the setting pointer and support of same direction position, makes the lead connection very convenient.For can be, and red, green luminotron be installed on support, even can clearly see also that at night pressure is at the upper limit or lower limit at the display working condition at night.According to design concept, when making its pressure pointer be in certain position of the upper limit or lower limit centre, even have a power failure, incoming call output is one state all again, has regularity.Cancelled hairspring because of this contactless tensimeter, structure is more simple, makes it not to be afraid of the error effect that vibration brings, and has improved the serviceable life of instrument.

Description of drawings

Fig. 1 is this novel front view.

Fig. 2 is the partial sectional view of Fig. 1.

Fig. 3 is the control circuit schematic diagram.

Embodiment

Below in conjunction with accompanying drawing embodiment, to this novel being further described.

By the control of the infrared ray shown in Fig. 1,2 contactless tensimeter, its employing one has the troffer 12 of center pit, utilizes the connecting pin at troffer 12 two ends to be fixedly mounted on the dial plate 1 by screw 16.This troffer 12 is provided with and shows red, green

light emitting diode

10,11, the setting knob 8 of packing in the center pit on it night.This setting knob 8 is two cover button structures, is separately installed with low pressure on its pair cover button and sets pointer 3 and high pressure setting pointer 9.The back side that this is low, high pressure is set pointer 3 and 9 is provided with an insulcrete 5 respectively.Have the gap and, all install on the control circuit 14 that is connected in the center holder cover 15 that passes lead in the troffer 12 by being welded to connect respectively at the two ends of its insulcrete 5 by the lead 17 of each connection at corresponding infrared transmitting tube 4,20 of same center line and infrared receiving tube 7,22.This control circuit 14 is installed in the hole clipping 13 of troffer 12 both sides.Wherein, the infrared receiving tube 22,7 that high and low pressure is set on the pointer 9,3 is installed in respectively in the bell housing 6 that has through hole, with the influence of the infrared ray around preventing to infrared receiving tube 22,7.By on the dial plate 1 by conduction axis 18, a pressure pointer 2 is installed, on pressure pointer 2, vertically be provided with as thin as a wafer a metal catch 19.The position is set should be in infrared transmitting

tube

20,4 and 22,7 liang of gaps of infrared receiving tube of this catch 19 makes it utilize catch 19 to cut off.

Fig. 3 has provided control circuit schematic diagram, wherein R ₁, R ₂, R ₃, R ₅Be current-limiting resistance, D ₁, D ₂Be infrared emission tube, D ₄, D ₅Be infrared receiver tube, D ₃, D ₆Be light emitting diode, D ₇Be protection T ₃Fly-wheel diode, T ₁, T ₂NPN is common triode, T ₃Be middle pliotron, R ₄Be to T ₂Negative bias resistance, C is an anti-interference capacitor.

This control circuit is made up of rest-set flip-flop, amplifier and light emitting source circuit.By triode T ₁, T ₂Collector two. a tunnel connect resistance R respectively ₂, R ₃With infrared receiving tube D ₄, D ₅Positive terminal; Another road is sending and receiving optical diode D respectively ₃, D ₆Positive pole, its negative pole is connected to T ₁, T ₂Emitter, T ₁, T ₂The base stage point be connected to infrared receiving tube D ₄, D ₅Negative pole and capacitor C, wherein by T ₂Base stage is passed through resistance R ₄Be connected to the rest-set flip-flop that negative pole end is formed, by T ₂The current collection limit pass through resistance R ₅Connect triode T ₃Base stage, T ₃Emitter connect negative pole, collector one tunnel meets diode D ₇Positive pole, diode D ₇Negative pole connects the amplifier that positive terminal is formed, by D ₇The end of negative pole relay termination T; Another road is connected to relay J.The resistance R that connects ₁String has the infrared transmitting tube D of 2 parallel connections ₁, D ₂The light emitting source circuit formed of positive pole.

Principle of work:

Starting stage is when the moment of power on circuitry, by resistance R ₄Power up to triode T ₂, this moment T ₂UB ₂Be " 0 ", and UC ₂Be " 1 ", make light emitting diode D ₆Luminous (green), and light emitting diode D ₆Also play simultaneously a pressure stabilization function.When the process resistance R ₅The time, T ₃UB ₃Be " 1 "-UC ₃Be " 0 " relay J adhesive, the starting of drive equipment.While T ₂UC ₂Be " 1 ", by by infrared receiving tube D ₅The power valve D that receives ₂The light source conducting, be added to T ₁Base stage UB ₁" 1 "-UC ₁Be " 0 ", and light emitting diode D ₃Not luminous (red).At this moment circuit still by above-mentioned work, works on pressure pointer 2, and the catch 19 on pressure pointer 2 cuts off the infrared transmitting tube D that the upper limit is set pointer ₂With infrared receiving tube D ₅The time, T ₁UB ₁Be " 0 "-UC ₁Be " 1 " light emitting diode D ₃Luminous (red) is through infrared receiving tube D ₄Be added to T ₂Base stage UB ₂Be " 1 "-UC ₂Be " 0 ", at this moment light emitting diode D ₆Put out (green) to T ₃UB ₃" 0 "-UC ₃" 1 ", the relay J power cutoff device stops.At this moment pressure pointer 2 is descending, makes the catch 19 on it cut off D ₁With D ₄The time, T ₂UB ₂Be " 0 "-UC ₂Be " 1 "-UB ₃" 1 "-UC ₃" 0 ", relay J adhesive equipment starts again, therewith working in reciprocating mode.As accident,, when the pressure pointer stops to the upper limit, lower limit or a certain centre position, still be in the one state of starting stage when recovering, and capacitor C is to prevent that the power supply interference is provided with and send a telegram here as outage.

Be connected in relay by the amplifier end in the above-mentioned technology, also can save relay J according to the needs of topworks and use as far distance controlled.

Claims

1, a kind of infrared ray control contactless tensimeter, comprise that manometric dial plate is provided with the pressure pointer, by setting knob height is installed respectively, low pressure is set pointer, (1) upward fixedly establishes a troffer (12) to it is characterized in that having dial plate, connect high on it by setting knob (8), low pressure is set pointer (9,3), at height, low pressure pointer (9,3) insulcrete (21 that the back side is provided with respectively, 5) two ends, be provided with gap and corresponding infrared transmitting tube (20 respectively, 4) and be installed in the infrared receiving tube (22 of the bell housing (6) that has through hole, 7), pass by lead (17) and be provided with lead center holder cover (15) and be connected on the control circuit (14) that sets firmly in the troffer (12); Be positioned at a baffle plate (19) that can pass through infrared transmitting tube (20,4) and infrared receiving tube (22,7) gap is set on the pressure pointer (2).

2, by the described infrared controlled pressing pressure table of claim 1, it is characterized in that the both sides of described troffer (12) have the hole clipping (13) that is used to install control circuit.

3, by the described infrared ray control of claim 1 contactless tensimeter, it is characterized in that on troffer (12), being provided with red, the green light emitting diode (10,11) that is used for the display working condition at night.

4, by the described infrared ray control of claim 1 contactless tensimeter, it is characterized in that described control circuit (14) is by triode T ₁, T ₂Collector connect resistance R respectively ₂, R ₃, light emitting diode D ₃, D ₆Positive pole and infrared receiving tube D ₄, D ₅Positive pole, D ₄, D ₅Negative pole is connected to triode T respectively ₁, T ₂Base stage and be connected to capacitor C, T ₂Base stage connects a resistance R ₄, T ₁, T ₂Emitter connect the rest-set flip-flop that negative pole end is formed, by T ₂Collector pass through resistance R ₅Be connected to triode T ₃Base stage, T ₃Collector be connected to diode D ₇Positive pole, T ₃Emitter connects the amplifier that negative pole is formed, by the resistance R that connects ₁String has 2 parallel with infrared power valve D ₁, D ₂The light emitting source circuit formed of positive pole.