CN87203045U - Dynamometer for contacts of relay - Google Patents

Abstract

At present, the test of the contact force of the relay at home and abroad uses the detection method of the gram testing gauze, and is unable to realize the automatization and the digitization of the test means. The utility model relates to a pressure tester for the contacts of the relay. A plurality of sensor probe heads of the pressure tester are fixed on a bracket. The bracket is arranged on the pedestal and slides backwards and forwards. The testing circuit of the pressure tester is composed of a stabilized power supply, an amplifying circuit, a signal converter and a digital display gauge. The testing circuit part is arranged in the shell body of the pressure tester. The utility model has the advantages of stable performance, accurate data, little error, high efficiency and convenient operation.

Description

Dynamometer for contacts of relay

The utility model relates to a kind of testing tool.

The test of relay tip pressure both at home and abroad at present, the detection method of gram meter is surveyed in common employing, this means of testing is because artificial manual test, be difficult to guarantee the relative fixed of proving installation and measured relay position, test data instability, inaccurate not only, and the signal of non electrical quantity power can not change electric signal into, can't realize the robotization and the digitizing of means of testing.

The purpose of this utility model is to adopt a kind of novel test circuit, and Exact Number output is arranged, to improve the measuring accuracy of relay tip pressure.

The utility model is by the tester panel, housing, test circuit, sensor is formed, tester panel left part is provided with eight digital washes, each table side is equipped with the zeroing knob, the panel right lower quadrant is equipped with power switch and connecting point position switch, and test circuit is installed in enclosure interior, and a plurality of sensors are connected with amplifying circuit by lead.The output of the stabilized voltage supply of test circuit is connected with sensor, and its output is connected with amplifying circuit, is connected with digital wash through converter by the amplifying circuit amplifying signal.The probe of sensor is linked to each other with pedestal with support by nut, sensor probe is fixed on the support by eight groups of spring leafs that post foil gauge respectively, and control it by locking device and move, support is regulated and can be moved up and down by nut, and its bottom seat is on the chute that pedestal can slide for its front and back.This relay tip pressure tester circuit theory as shown in Figure 2, the first of control circuit forms high precision 3V D.C. regulated power supply by BBG1～BG3 and uA741 provides bridge circuit voltage to strain bridge, the second portion linear amplifier by 7805,7905 and filter element provide positive and negative 5V power supply for μ A741 integrated package, finish linear amplification to strain signal by μ A741, third part forms 199 by ICL7017CPL and digital display system.9MV double oblique integral formula A/D converter circuit is responsible for the amplifying signal digital processing is shown.Its principle of work is, 0～3MV voltage signal of electric transducer output through multi-core cable wire and 37 line plug-in units, inserts each control module of 8 control modules respectively, to finish it to relay contact conversion up and down by the K2-1 synchro control, J1J2 relay coil energising when K2 is closed, while J1-1, J1-2 movable contact and normally opened contact adhesive, this moment, the JD1 tripod was by the relay shorted to earth, no signal input, and J1-3, J1-4, turn to normal battle, JD2 input end and bridge circuit are connected JD2 work, and J2 adhesive is meanwhile amplified magnitude of voltage with JD2 six pin and sent into A/D conversion system, finish eight windings point, upper contact shows, after K2 removes downward contact, J1, the J2 relay coil discharges, simultaneously J1-1, the J1-2 movable contact resets, this moment, JD1 connected, and the output of JD1 six pin signals is sent into A/D conversion system through the J2 normally closed contact, while J1-3, J1-4 turns to normally closed contact, with the sealing of JD2 input signal, measures thereby finish down contact.

Sensor section of the present utility model, after making instrument once insert relay, problems of measurement when a switch solves the front and back contact, sensor adds moving axis, make it free movable, do not increase the impressed pressure between contact, difficulty has taken place in the introducing of sensor like this, because relay is moving, the break stationkeeping, and the gap of having only 1.4mm, cantilever beam sensor is movable, have deviation can not guarantee that just 16 winding points insert simultaneously slightly, the utility model has adopted the device of first locking sensor, makes sensor and relay position relative fixed, after sensor is introduced relay, open locking device again and make the affranchise function of activity of sensor, just can measure.After sensor semi-girder position locking is fixing, the position no longer changes, but there is error in the junction unit of relay own, and every relay error amount is inequality again, interchangeability problem for many relays need solve again, its solution is the shape that has changed sensor semi-girder front end, make the diameter of double-deck semi-girder A/F greater than 1/2 relay movable contact axle, again less than diameter, and make the semi-girder front end circular, so double-deck semi-girder can slide along the cylindrical cambered surface of movable contact and introduce, even the relay tip unit has deviation also can insert smoothly slightly, for the bigger relay of deviation, only need fine setting height spiral to solve.Relay of the every survey of operator all needs the process through pegging graft and extracting, the test pedestal needs the shift position, each like this position of putting back to the test pedestal can not guarantee in full accord with original position, promptly can not guarantee smooth insertion, can not guarantee repeatability and the consistency problem tested again, the utility model has added stationary platen and has taked the pin location, promptly move accurate positioning again flexibly, guarantee the accuracy of test, reduce the trouble that the operator adjusts for a time sensing station, accomplish that one-time positioning is often constant for a long time, stable in order to guarantee instrument performance, if one group of utility power, improved the stability of power supply, reduced the extension line of sensor, in order to improve the interference free performance of complete machine, with amplifying circuit, the connecting point position conversion, analog to digital conversion is designed to 8 unit independence control volumes, makes the outer signals interference that influences between system and group obtain improving significantly.

The utlity model has stable performance, measurement data is accurate, and systematic error is little, high efficiency, characteristics such as easy to use.

Accompanying drawing 1 is the utility model external form synoptic diagram, and 1 is digital wash among the figure, and 2 are the zeroing knob, and 3 is power switch, and 4 is switch, and 5 is housing.

Accompanying drawing 2 is the utility model circuit theory diagrams, and 6 is sensor among the figure, and 7 is stabilized voltage supply, and 8 is amplifying circuit, and 9 is converter.

Accompanying drawing 3 is the sensor construction synoptic diagram, and 10 are probe among the figure, and 11 is that support 12 is pedestal, and 13 is spring leaf, and 14 is locking device.

Accompanying drawing 3 is this bright book accompanying drawing.

Embodiment:

The tester profile is the cube shaped of 650mm * 400mm * 500mm, sensor base is a steel part, chute is arranged on it, support is sitting on this chute, can slide front and back, mid-stent has nut that sensor probe and support top are fixed, regulating support by nut can move up and down, probe is made of upper and lower 16 strain flexure strips, and flexure strip posts Opinions-Pictures copper foil gauge Di the Jiao, by plastic jacket in its outside, test circuit all adopts homemade element, and operational amplifier adopts μ A741.

Claims (4)

1, relay tip pressure tester, form by tester panel, housing, test circuit, sensor, it is characterized in that tester panel left part is provided with eight digital washes [1], each table side is equipped with zeroing knob [2], the panel right lower quadrant is equipped with power switch [3] and connecting point position switch [4], test circuit is installed in housing [5] inside, and a plurality of sensors [6] are connected with amplifying circuit by lead.

2, according to the described relay tip pressure tester of claim 1, the output that it is characterized in that the stabilized voltage supply (7) of said test circuit is connected with sensor (6), its output is connected with amplifying circuit (8), is connected with digital wash (10) through converter (9) by the amplifying circuit amplifying signal.

3,, it is characterized in that the probe (11) of said sensor (6) is linked to each other with pedestal (13) with support (12) by nut according to the described relay tip pressure tester of claim 1.

4, according to claim 1,3 described relay tip pressure testers, it is characterized in that said sensor probe (11) is fixed on the support (12) by eight groups of spring leafs (14) that post foil gauge respectively, and control it by locking device (15) and move, support (12) is regulated and can be moved up and down by nut, and its bottom seat is on the chute that pedestal can slide for its front and back.

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