CN2151462Y

CN2151462Y - Steel wire online inspecting sensor

Info

Publication number: CN2151462Y
Application number: CN 93233329
Authority: CN
Inventors: 曹杰; 周波; 刘果苹
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-02-27
Filing date: 1993-02-27
Publication date: 1993-12-29
Anticipated expiration: 2003-02-27

Abstract

The utility model relates to a steel wire online inspecting sensor, which is formed by an AC bridge formed by impedances L1-L4. Detecting signals which are outputted by the utility model measure the breakage state of steel wires online. The utility model has simple structure and sensitive transducing signals, which is an ideal steel wire online inspecting sensor.

Description

Steel wire online inspecting sensor

The utility model relates to a kind of sensor that is used for the online detection of steel cable.

Wire rope traction equipment is very extensive in industrial application, but still lack the means that steel cable is detected at present, can't online in real time measure steel cable disconnected strand, the cross section diminishes, breakdown situations such as corrosion, therefore use department often adopts the way of periodic replacement steel cable to guarantee that steel cable safety is intact, and in fact this method had both caused a large amount of wastes, can not guarantee safety veritably again.

The purpose of this utility model is to be to provide a kind of sensor that is used for the online detection of steel cable, breakdown situations such as it can diminish disconnected thigh, the cross section of online steel cable, corrosion convert the detection electric signal to, for providing sound and light alarm after the instrument processing, guarantee the safety of personnel and equipment.

Order of the present utility model is realized by following manner: it is formed alternating current bridge by impedance L1～L4 and constitutes, two contact output detection signals in the middle of the brachium pontis, and the brachium pontis L1 in this electric bridge is the helix tube type coil, places tested steel cable in this helix tube type coil.Helix tube type coil L2 can be the adjustable inductance coil, in electric bridge brachium pontis L3 and L4 can be twin coil and around the tight coupling coil or be composed in series adjustable coil or adjustable potentiometer by coil L3 and L4.

Accompanying drawing has provided two embodiment of the present utility model.

Fig. 1 is the utility model embodiment 1 schematic diagram;

Fig. 2 is the utility model embodiment 2 schematic diagrams;

Fig. 3 detects the tester circuit block diagram of steel cable for utilization the utility model;

Fig. 4 is a power conversion electrical schematic diagram in the tester;

Fig. 5 is an other parts electrical schematic diagram in the tester.

The utility model is described in further detail with reference to the accompanying drawings.

Embodiment 1, with reference to Fig. 1, Fig. 3, Fig. 4, Fig. 5, by electric coil L1, L2, L3, L4 forms alternating current bridge, two brachium pontis L1L2 are the unicoil helix tube type in this electric bridge, its framework material adopts nonferromagnetic material (as aluminium, copper, nylon rod, bakelite), their external form is made unanimity, brachium pontis L2 is an adjustable inductor, it can press number X1 or adjust auxiliary iron core in the skeleton by modulation coil, realizes regulating resistance value, is used for adjusting bridge balance, brachium pontis L3L4 adopt two-wire and around the tight coupling coil, resistance R 1 serial connection alternating current bridge L1L2L3L4, it is a current-limiting resistance, can determine resistance on demand.In Fig. 3, the tester that uses this sensor steel cable is by power conversion 1, sensor 2, input circuit 3, amplify demodulator circuit 4, comparator circuit 5, output circuit 6 compositions, power conversion is formed by transformer T1T2T3T4 and with its current rectifying and wave filtering circuit, its secondary voltage is respectively 12v, 12v, 12v, 6.3v, transformer T1 is by contact E1E2 output 12v alternating current, by contact E3, E4 output, transformer T3 is exported by contact E5, E4 after diode V2, capacitor C 2 rectifications transformer T2 through bridge rectifier V1, capacitor C 1, regulator block 7812.Transformer T4 is through bridge rectifier V3, capacitor C 3, after the rectification by contact E6, E4 output, 2 liang of contact E1E2 of sensor meet transformer T1 output terminal E1E2, input circuit 3 is by stabilivolt V5, V6, capacitor C 4, C5, resistance R 2, R3 and amplifier A1 form, it plays the impedance conversion effect, amplify demodulator circuit 4 by capacitor C 6, C7, C8, resistance R 4R5, R6 amplifier A2 forms, its signal to prime is when high power is amplified, carry out demodulation again, become direct current signal comparator circuit 5 by amplifier A5, potentiometer W2, resistance R 9 is formed the lower limit comparer, by amplifier A6, potentiometer W3, resistance R 11 is formed upper limit comparer, output circuit 6 is by amplifier A3, A4, diode V7, V8, V9, V12, V13 triode V10, V11, relay J, contact J1, resistance R 7, R8, R9, R10, R12 and capacitor C 9, C10 voltage table P forms, it can promote gauge outfit, sound and light alarm is provided, and, provides signal for external control by a pair of contact.Transformer T2 output terminal E3E4 electricity meets input circuit 3 input end E3, E4, and transformer T3 output terminal E5E4 electricity connects lower limit comparator input terminal E5.Two contact E7, E4 output detection signal add on the input circuit 3 in the middle of the sensor Bridge 2 arm.

This tester course of work is as follows: when detecting certain steel cable, at first two standard models are put into single line helix tube type coil L1L2 respectively, adjust the iron core of brachium pontis L2 in the sensor, making the signal voltage between the middle two contact E7E4 of sensor Bridge 2 arm is a certain value, at this moment, gauge outfit P is designated as zero, while regulator potentiometer W2, W3, and it is critical that sound and light alarm is in.Take out sample then from single line helix tube type coil L1, put into sample, when both various performances were the same, gauge outfit P did not change, and sound and light alarm is failure to actuate.When both performances are inconsistent, diminish as the sample sectional area, then two contact E7E4 output signals obviously increase in the middle of the sensor Bridge 2 arm, this signal is through capacitor C 4, resistance R 2 adds among the amplifier A1, after impedance conversion, through capacitor C 6, resistance R 4 adds among the amplifier A2, zoom into high letter direct current signal, through capacitor C 8, resistance R 7 adds among the amplifier A3, and impedance conversion once more adds among the amplifier A4 through resistance R 8, transporting to gauge outfit P shows, go back input amplifier A5 simultaneously, A6 compares, and this moment, output potential was uprised by low, made compound transistor V10, V11 and diode V7V8 conducting, circuit breaker J1 adhesive, send sound and light alarm, this moment, amplifier A6 was constant, and the expression sectional area is not more than standard sample.

Embodiment 2, with reference to Fig. 2, with example 1 difference is to use Wound-rotor type adjustable potentiometer W1, replace two-wire and take up pickup coil L3, L4, adjust potentiometer W1 and can make bridge balance, must not adjust iron core among the brachium pontis single line helix tube type coil L2 among this embodiment or the number of turn is adjusted impedance, but counterbalance effect is not as embodiment 1, all the other are all with embodiment 1.

The utility model adopts impedance L1～L4 to form alternating current bridge, and therefrom output detection signal is measured the damaged situation of online steel cable, and it is simple in structure, and the transducing signal sensitivity is a kind of desirable steel cable detecting line sensor.

Claims

1, a kind of sensor that is used for the online detection of steel cable, it is characterized in that it forms alternating current bridge by impedance L1, L2, L3, L4 and constitute, from the middle E7 of brachium pontis, E4 two contact output detection signals, the brachium pontis L1 in this electric bridge is the helix tube type coil, places tested steel cable in this helix tube type coil.

2, according to the described sensor of claim 1, it is characterized in that helix tube type coil L2 is the adjustable inductance coil, brachium pontis L3 in the electric bridge and L4 be twin coil and around the tight coupling coil or be composed in series adjustable coil or adjustable potentiometer by coil L3 and L4.