CN2177943Y

CN2177943Y - Tester for tension change of yarn

Info

Publication number: CN2177943Y
Application number: CN 93240739
Authority: CN
Inventors: 邹理国
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-10-07
Filing date: 1993-10-07
Publication date: 1994-09-21
Anticipated expiration: 2003-10-07

Abstract

The utility model relates to a tester for detecting the tension change of yarn, which mainly comprises a tester casing, a sensing head for detecting the tension of the yarn, a strain gauge and two crossing plates. The utility model is used for detecting the strain condition of the tension of the yarn during the processing to ensure normal operation.

Description

Tester for tension change of yarn

The utility model relates to a kind of in order to detect the device that yarn tension changes, and particularly relates to a kind ofly directly detecting the strain conditions of yarn tension in the processing with strainometer, and directly reflects the variation of unusual yarn, as the signal foundation of control, to guarantee normal running.

Processing yarn is whether best in quality at present, depends on the variation of yarn tension in raw material and process, if can't accurately detect the variation situation of yarn tension, the finished product that then machines is difficult to the product quality of guaranteeing that it is good.

The purpose of this utility model is to provide a kind of device that yarn tension changes that detects.

The device that this detection yarn tension according to the present invention changes comprises: a detecting device housing, and it has a notch that makes progress, and the front and back both side edges of notch is respectively extended a downward-sloping guide plate from housing, as the guiding structural of yarn; One detects the sensing head of yarn tension, and it has a sensing cantilever, is arranged on the inside of detecting device housing, and its sensing head extends the centre of the notch of this detecting device housing, and vertical mutually with guide plate, to detect yarn tension and to change yarn pressure into strain output; One strainometer, it is a binding type strainometer, is attached on the sensing cantilever, when the sensing cantilever force, the offset variable size that it produces can produce a resistance change output that is proportional to its variable; Two straddles divide the place, two side of the notch be located at the detecting device housing, and the top of each straddle is a level and smooth V-shaped groove structure, so that horizontal yarn at this notch bridges in the V-shaped groove of this straddle, but make the sensing head stable detection arrive the variation phenomenon of yarn.

The utility model can accurately detect the strain conditions and the due linear relationship thereof of yarn, but to various thickness yarns all stable detection to various variation phenomenons.The utility model can detect yarn variation situation to be had:

1, raw material variation

2, condition enactment is improper

3, maintenance of machine is bad

4, operation careless mistake

Deng the yarn tension variation of cause in process, and cause yarn to produce every unusual situation.

Have, the utility model is the collection of borrowing the various exception informations of preceding page or leaf again, can carry out systematic analysis to abnormal cause in order to assist factory, thereby can improve product percent of pass, efficient for machinery also is improved, and then production cost is significantly reduced, and reaches the purpose that improves the quality.

Principle of the present utility model is to be subjected to strength to be converted to electric signal instrumentation mode, be subjected to external force to do the time spent at stabilized elastomer, the distortion that detects elastomeric tension variation and produce, and then make the interior change in resistance of strainometer, because resistance change, and make output voltage change, because, it only accepts the error that direct sensing does not have other mechanical actions, so its correctness is high, is to be best at present detection mode.

Below will structural design of the present utility model be done one and describe in detail, and consult accompanying drawing, will do further to describe feature of the present utility model, wherein:

Fig. 1 is a stereographic map of the present utility model;

Fig. 2 is a side view cutaway drawing of the present utility model.

Consult Fig. 1 and Fig. 2 simultaneously, comprise a detecting device housing 1, it has a notch that makes progress 11, the front and back both side edges of notch, and respectively being extended by housing 1 has a downward-sloping

guide plate

12,13, with the guiding structural as yarn.

Inside at detecting device housing 1, the sensing head 3(that is provided with yarn tension is as shown in Figure 2) and relevant signal amplification circuit, its sensing head 3 has the front end that a sensing cantilever 31 is arranged on this detection head, and sensing cantilever 31 extends the centre of the notch 11 of this detecting device housing, and with

guide plate

12,13 that direction is set is vertical mutually, its sensing cantilever 31 is subjected to the pressure of yarn, and it act as in order to detect yarn tension, and with the yarn pressure signal, send in the strainometer 32, export pressure signal is changed into strain, and make signal by signal amplification circuit and amplify.

Strainometer 32 is the strainometer of a binding type, the circuit board 33(that stickup is attached to sensing cantilever rear end as shown in Figure 2), and form a pressure pick-up jointly, when the sensing cantilever force, the displacement of its generation or length variable size can produce a resistance change output that is proportional to its variable.

The resistance variations of its strainometer can be represented by following formula,

R＋△R＝（α＋△α）L/A

Wherein

R: strainometer initial stage resistance value (Ω)

△ R: the strain of strainometer causes the variable quantity of resistance value (Ω)

α: the resistance coefficient of strainometer (mm Ω)

△ α: the resistance coefficient variable quantity that the strain of strainometer causes (mm Ω)

L: the length of strainometer

A: the sectional area of strainometer

In the utility model, also has the design of two straddles, its straddle was located at the place, two side of the notch 11 of detecting device housing in 2 minutes, the top of each straddle is a level and smooth V-shaped groove structure 22, so that horizontal yarn at this notch, bridge in the V-shaped groove of this straddle, make the stable and unlikely any skew of yarn, but make the variation phenomenon of the utility model stable detection to yarn.

Straddle 2 has an oval through hole 21, its can by the bolt (not shown) run through and with straddle 2 locking at detecting device housing 1 sidewall in screw 14, and straddle 2 can be along the y direction of this ellipse through hole 21 and its height of inching, is pressed in pressure on the sensing cantilever 31 to regulate yarn.

In the utility model, on detecting device housing 1, also be provided with one and adjust hole 15 in addition, can adjust the hole whereby, adjust the sensitivity of inductive head.And at the sidewall of detecting device housing 1, be provided with one and detect hole 16, can be used to the joint detection ammeter.

Sensing head will be subjected to strength to be converted to electric signal instrumentation mode, the cantilever elastic body is stressed does the time spent stablizing, the rugged change that detects elastomeric tension variation and produce, and then make the interior change in resistance of strainometer, because resistance change, and make output voltage change, because, it only is subjected to direct sensing and does not have the error of other mechanical actions, so its correctness is high, is to be best at present detection mode.

Claims

1, a kind of device that detects yarn tension, in order to detect the strain conditions of yarn tension in the processing, it is characterized in that it comprises: a detecting device housing, one detects the sensing head of yarn tension, one strainometer and two straddles, wherein, described detecting device housing has a notch that makes progress, the front and back both side edges of notch is extended a downward-sloping guide plate respectively by housing, as the guiding structural of yarn; Described sensing head is installed in the inside of detecting device housing, and has a sensing cantilever, and sensing head extends to the notch centre of detecting device housing, and vertical mutually with guide plate, to detect yarn tension and to change yarn pressure into strain output; A binding type strainometer is counted in described strain, is attached on the sensing cantilever, and when the sensing cantilever force, the offset variable of its generation size can produce a resistance change output that is proportional to its variable; Described two straddles are installed in the place, two side of the notch of detecting device housing respectively, the top of each straddle is the structure of a level and smooth and V-shaped groove, bridge in the V-shaped groove of straddle so that be horizontally placed on the yarn of this notch, make sensing head can stably detect the variation phenomenon of yarn.

2, detection yarn tension changeable device according to claim 1, it is characterized in that, two straddles all have an oval through hole, it is locked straddle at the sidewall of detecting device housing by bolt-through, and straddle can be adjusted its height along the long axis direction of this ellipse through hole, is pressed in pressure on the sensing head in order to regulate yarn.