CN204347148U

CN204347148U - Parking spot pulse width measuring instrument

Info

Publication number: CN204347148U
Application number: CN201420840717.2U
Authority: CN
Inventors: 黄远凤
Original assignee: WANJIANG AERIAL ELECTROMECHANICAL CO Ltd GUIYANG CITY
Current assignee: WANJIANG AERIAL ELECTROMECHANICAL CO Ltd GUIYANG CITY
Priority date: 2014-12-26
Filing date: 2014-12-26
Publication date: 2015-05-20
Anticipated expiration: 2024-12-26

Abstract

The utility model discloses a kind of parking spot pulse width measuring instrument, comprise motor interface (2), oscillograph interface (4), direct supply interface (6); Wherein motor interface (2) comprises high-speed line, low speed line, signal wire and negative wire; Oscillograph interface (4) comprises positive wiring and negative wiring; Direct supply interface (6) comprises positive pole and negative pole; The positive pole of direct supply interface (6) is connected with DC insurance (7), then two-way in parallel is divided into, high-speed line, the low speed line of one tunnel selectivity and motor interface (2) are connected, and resistance in series (11) of separately leading up to is connected with the positive wiring of oscillograph interface (4) again; The negative pole of direct supply interface (6) is communicated with the negative wiring of oscillograph interface (4) with the negative wire of motor interface (2); The signal wire of motor interface (2) is communicated with the positive wiring of oscillograph interface (4).The utility model wiring and convenient, the high low speed of measurement switch fast, without speed line short circuit risk.

Description

Parking spot pulse width measuring instrument

Technical field

The utility model relates to a kind of electric signal measurement instrument, and particularly a kind of direct current generator of measuring is at the parking spot pulse width measuring instrument of operational process through parking spot pulse width.

Background technology

Rain shaving electrical machine parking principle: as accompanying drawing 3, motor pressing cover there are two shell fragment contacts 16, connect motor negative wire and signal wire respectively, motor worm gear 15 rotates around a direction, when needing to stop, toggle switch makes motor be in parking standby condition, when copper sheet on worm gear 14 breach is through shell fragment contact 16, two shell fragment contact 16 short circuits, motor stops.

Windscreen wiper direct current generator is when needs stop, short circuit duration needs to reach regular hour length, motor is just allowed to stop (parking), this is to effectively be avoided unexpectedly short circuit, the copper wire that such as possibility motor internal wearing and tearing produce, or the short circuit that some metallic impurity cause, therefore current most of main depot all requires to provide parking pulse width numerical value.

Before this, the measurement of pulse width when windscreen wiper manufacturing firm does not generally carry out parking spot, even if fraction carries out the producer of measuring, its method is also not fully up to expectations.Current measurement wiper motor is through park position signal pulse width, by the resistance of certain resistance is accessed parking spot loop, again oscilloprobe is accessed between signal wire and negative wire respectively, manually access direct supply to speed line and negative wire simultaneously, by oscillograph, thus record the width of wiper motor through park position signal pulse.There is certain problem in this method: the first, needs the loop manually accessing power supply, resistance forms ranging pulse width before each measurement.The second, during parking spot pulse width when measuring high/low speed respectively, need manual rewiring that motor is being worked at a high speed or under low speed.3rd, when measuring a certain speed, another speed line easily and electric machine casing collide, cause measuring error, even motor damage.

Summary of the invention

A kind of wiring that the purpose of this utility model is to overcome above-mentioned shortcoming and provides and measure convenient, high low speed switch quick, without the parking spot pulse width measuring instrument of speed line short circuit risk.

The technical solution of the utility model: a kind of parking spot pulse width measuring instrument, comprises motor interface, the oscillograph interface be connected with oscillograph, the direct supply interface that is connected with direct supply that motor connects; Wherein motor interface comprises high-speed line, low speed line, signal wire and negative wire; Oscillograph interface comprises positive wiring and negative wiring; Direct supply interface comprises positive pole and negative pole; The positive pole of direct supply interface is connected with DC insurance, is then divided into two-way in parallel, and high-speed line, the low speed line of a road selectivity and motor interface are connected, and resistance in series of separately leading up to is connected with the positive wiring of oscillograph interface again; The negative pole of direct supply interface is communicated with the negative wiring of oscillograph interface with the negative wire of motor interface; The signal wire of motor interface is communicated with the positive wiring of oscillograph interface.

Above-mentioned parking spot pulse width measuring instrument, wherein: the selectivity connected mode of the positive pole of described direct supply interface and the high-speed line of motor interface, low speed line, be adopt switch selectivity to be connected with the first relay, the second relay, thus make the first relay normally open contact be communicated with the high-speed line of motor interface respectively or the second relay normally open contact is communicated with the low speed line of motor interface.

Above-mentioned parking spot pulse width measuring instrument, wherein: the resistance of described resistance is 700 ohm.

Compared with prior art, the control circuit measuring motor parking spot pulse width is integrated in tester the utility model by the utility model, is directly connected with motor by special interface, then by the special purpose interface of oscillographic probe access tester; Carry out high low speed conversion by tester panel switch pilot relay, the special purpose interface that this tester is equipped with avoids the trouble of link before each measurement, simplifies method of testing, and ensure that measuring accuracy.The access of high/low speed conversion, not only changes conveniently, and avoids because another speed line is easy and electric machine casing is collided, and causes measuring error, even the danger of motor damage.

Accompanying drawing explanation

Fig. 1 is outside annexation schematic diagram of the present utility model;

Fig. 2 is electrical block diagram of the present utility model;

Fig. 3 be with the utility model with the use of the structure principle chart of motor.

mark in figure:

1, motor; 2, motor interface; 3, oscillograph; 4, oscillograph interface; 5, direct supply; 6, direct supply interface; 7, DC insurance; 8, switch; 9, the first relay; 10, the second relay; 11, resistance; 12, the first relay normally open contact; 13, the second relay normally open contact; 14, copper sheet; 15, worm gear; 16, shell fragment contact.

Embodiment

Below in conjunction with accompanying drawing and preferred embodiment, to according to parking spot pulse width measuring instrument embodiment, structure, feature and the effect thereof that the utility model proposes, be described in detail as follows.

Embodiment

Parking spot pulse width measuring instrument, as shown in Figure 1, this measuring instrument is connected with motor 1, oscillograph 3, direct supply 5 by motor interface 2, oscillograph interface 4, direct supply interface 6 outside annexation schematic diagram respectively.Line is unified integrated by special purpose interface by this measuring instrument, for by the conversion of the input signal of motor through measurement circuit, be convenient to control motor test pulse width at various speeds, oscillograph to be used in collecting test circuit motor parking spot pulse width out, and direct supply is for providing the power supply of circuit.

As described in Figure 2, wherein motor interface 2 comprises the high-speed line corresponding with motor 1 extension line, low speed line, signal wire and negative wire to the electrical block diagram of parking spot pulse width measuring instrument; Oscillograph interface 4 comprises positive wiring and negative wiring; Direct supply interface 6 comprises positive pole and negative pole; The positive pole of direct supply interface 6 is connected with DC insurance 7, is then divided into two-way in parallel, and high-speed line, the low speed line of a road selectivity and motor interface 2 are connected, and the resistance 11 of series connection 700 ohm of separately leading up to is connected with the positive wiring of oscillograph interface 4 again; The negative pole of direct supply interface 6 is communicated with the negative wiring of oscillograph interface 4 with the negative wire of motor interface 2; The signal wire of motor interface 2 is communicated with the positive wiring of oscillograph interface 4.

The selectivity connected mode of the positive pole of described direct supply interface 6 and the high-speed line of motor interface 2, low speed line, the present embodiment adopts switch 8 selectivity to be connected with the first relay 9, second relay 10, thus make the first relay normally open contact 12 be communicated with the high-speed line of motor interface 2 respectively or the second relay normally open contact 13 is communicated with the low speed line of motor interface 2.In order to adapt to other operative scenario, common commutation switch switching or alternate manner also can be adopted to carry out route choosing.

With the utility model with the use of motor structure principle chart as shown in Figure 3.High low speed line is the power line of motor, and negative wire and signal wire form signal circuit.

Principle of work: when DC voltage is added to by DC insurance on switch 8 by direct supply 5, switch 8 selectivity is connected with the first relay 9 or the second relay 10, arbitrary relay obtains voltage and then connects first relay normally open contact 12 or second relay normally open contact 13 corresponding with it, now motor obtains voltage by motor interface 2, and motor can work at a high speed or under low speed.DC voltage forms signal testing loop by the signal wire of resistance 11 and motor 1 and negative wire, motor at operational process through parking spot, signal wire and negative wire are connected, now oscillograph interface 4 has electronegative potential (i.e. 0V) signal to export, and when motor leaves parking spot in operational process, oscillograph interface 4 has high potential signal to export (supply voltage).The oscillograph 3 accessed by oscillograph interface 4 can read motor in the pulse width through parking spot.

The above, it is only preferred embodiment of the present utility model, not any pro forma restriction is done to the utility model, anyly do not depart from technical solutions of the utility model content, the any simple modification done above embodiment according to technical spirit of the present utility model, equivalent variations and modification, all still belong in the scope of technical solutions of the utility model.

Claims

1. a parking spot pulse width measuring instrument, is characterized in that: comprise the motor interface (2) be connected with motor (1), the oscillograph interface (4) be connected with oscillograph (3), the direct supply interface (6) that is connected with direct supply (5); Wherein motor interface (2) comprises high-speed line, low speed line, signal wire and negative wire; Oscillograph interface (4) comprises positive wiring and negative wiring; Direct supply interface (6) comprises positive pole and negative pole; The positive pole of direct supply interface (6) is connected with DC insurance (7), then two-way in parallel is divided into, high-speed line, the low speed line of one tunnel selectivity and motor interface (2) are connected, and resistance in series (11) of separately leading up to is connected with the positive wiring of oscillograph interface (4) again; The negative pole of direct supply interface (6) is communicated with the negative wiring of oscillograph interface (4) with the negative wire of motor interface (2); The signal wire of motor interface (2) is communicated with the positive wiring of oscillograph interface (4).

2. parking spot pulse width measuring instrument as claimed in claim 1, it is characterized in that: the positive pole of described direct supply interface (6) and the high-speed line of motor interface (2), the selectivity connected mode of low speed line, be adopt switch (8) selectivity to be connected with the first relay (9), the second relay (10), thus make the first relay normally open contact (12) be communicated with the high-speed line of motor interface (2) or the second relay normally open contact (13) is communicated with the low speed line of motor interface (2) respectively.

3. parking spot pulse width measuring instrument as claimed in claim 1 or 2, is characterized in that: the resistance of described resistance (11) is 700 ohm.