CN2096044U

CN2096044U - Composite back and forth flow meter

Info

Publication number: CN2096044U
Application number: CN 91215425
Authority: CN
Inventors: 吴玉凤
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-05-04
Filing date: 1991-05-04
Publication date: 1992-02-12

Abstract

The utility model relates to a device used for converting the rotation of a pointer on a pointer type instrument into electrical signals for counting, which comprises a first sensor responding the rotation of the pointer to proportionally generate pulse signals and a second sensor responding the forward and reverse rotation of the pointer to generate counting control signals, a counting device which does accumulating operation when the pointer of the instrument rotates forwards and does subtracting operation when the pointer of the instrument rotates reversely under the control of the counting control signals, a display device displaying the count value in a digit form and a keyboard used for setting digits. The device of the utility model can respectively do adding/subtracting metering according the forward flow and the reverse flow of metered objects; consequently, the correct metering value can be obtained.

Description

Composite back and forth flow meter

The utility model relates to a kind of digital electronic unit, relates in particular to that a kind of hand motion with instrument converts digital electric signal to and the counting assembly counted.

The utility model is the improvement to formerly utility model No. 87211388 (also belonging to the applicant).No. 87211388, utility model patent adopts a sensor to represent the mechanical motion of certain variable to change into one by one switched electrical signal gauge pointer, can directly obtain the variable that numeral shows after being added up by totalizer.The shortcoming of this patent is, when the object reversed flow of being measured, although the pointer of gauging instrument is also done reverse mechanical motion, total indicator reading reduces but because totalizer can only be made accumulating operation, so the reading that numeral shows does not reduce, and continue to increase, will produce error in dipping like this.The situation of metering object reversed flow is actually rare, but accumulates over a long period, and metering is produced than mistake.

The utility model purpose is to provide a kind of and can adds up respectively or the tired counting assembly that subtracts metering according to the forward and reverse motion of needle of instrument.

The utility model has increased a forward and reverse motion with pointer and has changed into second sensor that adds, subtracts counting controling signal respectively on the basis of No. 87211388, last utility model, the signal controlling totalizer of this sensor output correspondingly carries out addition or subtraction.

Like this, when metering object reversed flow, its flow deducts from original variable, thereby obtains correct variable.

Above-mentioned second sensor is contained near the pointer that can show the flow direction of measuring object on the gauging instrument, and usually, this pointer can be that indication is than the pointer of low level (as first behind the radix point etc.) variable on the measuring instrument, and rotation is very fast during metering.

With reference to the accompanying drawings embodiment of the present utility model is described in detail.

Fig. 1 is the structural drawing of the Sensor section of an embodiment of the utility model.

Fig. 2 is the electrical schematic diagram of an embodiment of the utility model.

Referring to Fig. 1,1 and 2 is respectively two pointers on the pointer measuring instrument, and generally, pointer 1 is selected the rotation i.e. bigger pointer of variable of indication slowly for use, and as the units pointer, and pointer 2 is selected for use and rotated pointer faster, as ten/one digit number pointer etc.All be provided with magnet on two pointers, its utmost point is to being in vertical direction, selects the N utmost point upwards (the S utmost point upwards also can) among the figure.A distance is provided with a tongue tube 3 above pointer 1, and pointer 1 rotates a circle, and just adhesive is once for two reeds in the tongue tube.With epoxy resin 4 tongue tube is fixed in the seal casinghousing 5 in the present embodiment, also can adopts any other fixing means certainly.Two leads of tongue tube 3 are through outside the housing 5.The electric signal that tongue tube 3 separately produces because of adhesive is used for counting.Magnet on the pointer 1 and tongue tube 3 are total can be described as first sensor.

Also other object that can freely rotate around a center of one rotatable disc 6(is set) above pointer 2, position corresponding with magnet on the pointer 2 on the disc 6 has also disposed a magnet 7, when pointer 2 rotates, make disc 6 also follow and do equidirectional rotation.One block 8 is set on the rotate path of disc 6, and the rotation that this block 8 is made disc 6 is limited in the scope of 360 ° of less thaies, and insufficient section is the pairing angle of block.The 9th, the bolster of disc 6.

Another tongue tube 10 is set above disc 6, and its position makes disc 6 whenever carry out once FR rotation, the reed of tongue tube 10 be adhesive once, and when disc 6 went to extreme position, reed was in separated position, i.e. output low level.Tongue tube 10 also with epoxy resin be fixed in the seal casinghousing 5 one of disc 6 top closely-spaced in, its lead passes housing 5.This part is the second alleged sensor of preamble.

The magnetic shield panel that one silicon steel sheet (high magnetic conductance material) is made is set between tongue tube 3 and 10.In the present embodiment two tongue tubes are packaged in the housing, but this not necessarily, when pointer 1 and 2 apart from each others, can hold them respectively with two housings, at this moment, barricade has not also needed.

Referring to Fig. 2.Wherein, integrated circuit block 11(for example can adopt LI3128MS of Sharp or LI3135MS) identical with No. 87211388, connection and the utility model patent of display screen and two row's keypads, course of action does not also repeat them here.K ₁, K ₂Be equivalent to tongue tube 3 and 10 respectively.Triode BG ₁And resistance R ₁, R ₂And capacitor C ₁Form a negative circuit, work as K ₁During connection, BG ₁Collector on produce a negative pulse, input integrated package 11 is counted.The This move process also has similar explanation in No. 87211388, utility model patent.

Work as K ₂After connecting once, at triode BG ₂Collector on the same negative pulse that produces, the 39th pin of this negative pulse input integrated package 11 makes integrated package 11 transfer to from accumulating operation and subtracts computing.Work as K ₂Again closure once after, the negative pulse that is produced makes integrated package 11 recover accumulating operations.

Like this, when pointer 2 transferred backward rotation to by forward, disc 6 is counter thereupon to turn around, bottle up by block 8 then, thereby positive pulse of tongue tube 10 outputs, integrated package 11 is transferred to do to subtract computing.Do forward when running when pointer transfers to, disc 6 turns to another extreme position thereupon, and tongue tube 10 is exported a positive pulse again, makes integrated package 11 recover accumulating operations.Because integrated package 11 electric be from moving additive operation at first, so, only need when pointer work is just being changeed, start integrated package 11, make accumulating operation in the time of can guaranteeing just changeing, and work subtracts computing during counter-rotating.

Claims

1, a kind of being used for is converted to the device that electric signal is counted with the hand motion of pointer instrument, described instrument comprises at least two root pointers, and described device comprises that one is used to respond the rotation of the certain variable of one of described pointer representative and proportional real estate is given birth to the first sensor of pulse signal; The counting assembly that this pulse signal is counted; Receive the count value output of described counting assembly and with its display device that shows with digital form, it is characterized in that, also comprise rotating forward or backwards of another pointer of response and produce second sensor of counting controling signal, described counting controling signal is used to control described counting assembly, make it when described another pointer forward rotation, to carry out accumulated counts, subtract counting and tire out when backward rotation, described first and second sensor is arranged on the described instrument.

2, device as claimed in claim 1, it is characterized in that, described first sensor comprises a magnet that is attached on the respective pointer, be fixed in the tongue tube and a seal casinghousing that encapsulates this tongue tube of a horizontal positioned of pointer top, the magnetic pole of described magnet roughly is positioned on the vertical direction, the mutual alignment of described tongue tube and described magnet guarantees to rotate for round-robin of described pointer, two reed adhesives once in the tongue tube, two leads that connect described two reeds respectively pass described housing, one is connected to a stable high level, and another is connected to described counting assembly by a phase inverter lotus root.

3, device as claimed in claim 1 is characterized in that, described second sensor comprises roughly in vertical direction first magnet of a magnetic pole being attached on the respective pointer; Be positioned on first magnet relative with it and can be 360 ° of scopes around fixing second magnet that rotates freely of axle center; Be fixed in the tongue tube and the seal casinghousing that encapsulates second magnet and tongue tube of a horizontal positioned of second magnet top, two reeds are arranged in the tongue tube, described second magnet can be followed described first magnet and be rotated in its slewing area, and the once rotation that spreads all over whole slewing area corresponding to described second magnet, two reeds are by being separated into adhesive to separating in the described tongue tube, two reeds connect lead respectively and pass housing, one of lead is connected to a stable high level, another lead is connected to described counting assembly by a phase inverter, and described counting controling signal is the positive pulse signal by described tongue tube output.

As claim 2 or 3 described devices, it is characterized in that 4, described counting assembly comprises an integrated circuit (model is LI3128MS of Sharp or LI3135MS), described display device is a LCDs.

5, device as claimed in claim 4 is characterized in that, it also comprises linking to each other with described integrated circuit can carry out the keyboard that numeral is provided with.