KR101165808B1 - operating signal monitoring apparatus using hall sensor - Google Patents

Abstract

The present invention relates to a non-contact operating signal monitoring apparatus using a hall sensor, and more particularly to a non-contact operating signal monitoring apparatus using a hall sensor, which comprises a delay unit for delaying the output signal of the hall sensor, A first comparator connected to an output terminal of the first comparator and configured to receive an output signal of the differentiator through a second inverting terminal and to be connected to a second non- A second comparator that compares the output signal of the first comparator with a first reference signal and outputs a comparison result; and a comparator that compares the output signal of the differentiator with a second reference signal that is input through the third non- inverting terminal and connected to the third inverting terminal, A first notification unit for outputting notification information corresponding to a comparison result of the second comparator; and a second notification unit for outputting notification information corresponding to a comparison result of the third comparator. According to the non-contact type operation signal monitoring apparatus using the hall sensor, it is possible to improve the measurement accuracy of the fine signal sensed through the hall sensor, and to provide an extended notification display over the reaction time of the hall sensor, It helps to increase cognitive ability.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a non-

The present invention relates to a non-contact type operation signal monitoring apparatus using a hall sensor, and more particularly, to a non-contact type operation signal monitoring apparatus using a hall sensor capable of enhancing sensing sensitivity for a fine signal and facilitating user's recognition will be.

Automobiles include many electric devices, and the application rate of electric devices is gradually increasing.

It is very important to accurately diagnose a malfunction due to malfunction caused by the failure of such an electric device, which can cause an accident and cause failure of other mechanical parts operated by an electric signal.

There are various elements such as motors, solenoids, and relays that act as electromagnetic devices in automobiles. In order to diagnose whether these electromagnetic elements are working, a tester machine or a voltage measuring device is used. There is an inconvenience that it is necessary to take off and measure the wire.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems described above, and it is an object of the present invention to provide a non-contact type sensor which can measure the operation of an electromagnetic element in a non-contact manner, A signal monitoring device is provided.

According to an aspect of the present invention, there is provided an apparatus for monitoring a non-contact operating signal using a Hall sensor, A delay unit for delaying an output signal of the Hall sensor; A first comparator for receiving an output signal of the hall sensor and a signal passed through the delay unit through a first non-inverting terminal for comparison and a first inverting terminal, respectively, for amplifying and outputting a comparison result; A differentiator connected to an output terminal of the first comparator; A second comparator that receives the output signal of the differentiator through a second inverting terminal and compares the output signal with a first reference signal connected to a second non-inverting terminal, and outputs a comparison result; A third comparator that receives the output signal of the differentiator via a third non-inverting terminal, compares it with a second reference signal connected to the third inverting terminal, and outputs a comparison result; A first notification unit for outputting notification information corresponding to a comparison result of the second comparator; And a second notification unit for outputting notification information corresponding to a comparison result of the third comparator.

Preferably, the delay unit is a first capacitor connected between the first inverting terminal and the ground, the differentiator includes: a second capacitor having one end connected to the output terminal of the first comparator; And a variable resistor connected in series between the other end of the second capacitor and the ground, the variable resistor being capable of adjusting a resistance value by a user.

More preferably, the first notification unit includes: a first light emitting device that emits light on / off according to a comparison result of the second comparator; And a buzzer connected to on / off of the first light emitting device to output sound on / off.

The first notification unit may include a first switch element that is switched on / off according to a control signal input through a first gate terminal; A third capacitor having one end connected to the output terminal of the second comparator and the other end connected to the ground; And a first discharging resistor having one end connected to the first gate terminal and the other end connected to the ground to discharge energy charged in the third capacitor, wherein the first light emitting element is turned on when the first switching element is turned on And is connected between the driving power source and the first switch element so as to emit light.

The second notification unit includes a second switch element that is switched on / off according to a control signal input through a second gate terminal; A fourth capacitor having one end connected to the output terminal of the third comparator and the other end connected to the ground; A second discharge resistor having one end connected to the second gate terminal and the other end connected to ground to discharge energy charged in the fourth capacitor; And a second light emitting device connected between the driving power source and the second switch device to emit light when the second switch device is turned on.

According to the non-contact type operating signal monitoring apparatus using the hall sensor according to the present invention, it is possible to improve the measurement accuracy of the fine signal sensed by the hall sensor, and to provide an extended notification display over the response time of the hall sensor, And to increase awareness of whether or not it is possible.

1 is a perspective view of a non-contact type operation signal monitoring apparatus using a hall sensor according to the present invention,
2 is a circuit diagram of a non-contact type operation signal monitoring apparatus using the Hall sensor of FIG. 1,
3 is a waveform diagram of simulation results when the signal of the Hall sensor changes to 50 ms with respect to the circuit of FIG. 2,
FIG. 4 is a waveform diagram of simulation results when the signal of the hall sensor changes to 20 ms with respect to the circuit of FIG. 2,
FIG. 5 is a waveform diagram of an output signal of the Hall sensor for a solenoid applied to an apparatus manufactured by the circuit of FIG. 2,
FIG. 6 is a waveform diagram of a portion of the output signal of the Hall sensor of FIG. 5 amplified by differentiating by a differentiator,
FIG. 7 is a waveform diagram of output waveforms of the first and second light emitting devices corresponding to the differential signal of FIG. 6; FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a non-contact operating signal monitoring apparatus using a Hall sensor according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view of a non-contact type operation signal monitoring apparatus using a hall sensor according to the present invention, and FIG. 2 is a circuit diagram of a non-contact type operation signal monitoring apparatus using the hall sensor of FIG.

Referring to FIGS. 1 and 2, the non-contact operating signal monitoring apparatus includes a main body 102 and a probe 103.

The probe 103 is equipped with a hall sensor 110 to be described later so that the output signal of the hall sensor 110 can be transmitted to the main unit 101 through a cable 105 connected to the main unit 101.

The main body 101 includes a signal processing element for processing a signal output from the hall sensor 110. The first and second light emitting devices 171 and 181 and a variable resistor 142 The adjustment knob 142a, and the power switch 107 are mounted so as to be exposed.

Reference numeral 179 denotes an acoustic hole for transmitting the sound output from the buzzer 178 to be described later, and reference numeral 109 denotes a power supply terminal connected to an external power source, for example, a vehicle battery to receive power.

Unlike the illustrated example, a power supply cord may be connected to use an AC commercial power source, and a power supply device for converting AC or DC into a desired DC voltage to supply a necessary voltage to the driving element may be incorporated therein .

The signal processing element in the operation signal monitoring apparatus 100 includes a hall sensor 110, first to third comparators 121 to 124, a delay unit 131, a differentiator 140, first and second notification units 170 (180).

The hall sensor 110 is known as an element which outputs a signal corresponding to a magnetic field, and a detailed description thereof will be omitted.

The output terminal 112 of the Hall sensor 110 is connected to the first non-inverting terminal 121a of the first comparator 121 through the first resistor R1 for current limiting.

The output terminal 112 of the Hall sensor 110 is connected to the first inverting terminal 121b of the first comparator 121 through the second resistor R1 for current limiting.

The first capacitor 131a applied to the delay unit 131 is connected between the first inverting terminal 121a and the ground to output an output signal from the hall sensor 110 through the output terminal 112 to the first non- (121a) to the first inverted terminal (121b).

The first comparator 121 receives the output signal and the delayed delay signal that are still output through the output terminal 112 of the Hall sensor 110 through the first non-inverting terminal 121a and the first inverting terminal 121b And amplifies and outputs the comparison result.

Therefore, even if the variation of the signal output from the Hall sensor 110 through the output terminal 112 is small, the first comparator 121 can increase the sensitivity to the variation signal primarily by extending the range of variation by the delay unit 131 .

Reference numeral 128 denotes a noise canceling capacitor.

The differentiator 140 is connected to the output terminal of the first comparator 121.

The differentiator 140 includes a second capacitor 141 having one end connected to the output terminal of the first comparator 121 and a second capacitor 141 connected in series between the other end 141a of the second capacitor 141 and the ground, And a variable resistor 142 that can be turned on.

The other end of the variable resistor 142 is connected between two voltage dividing resistors R3 and R4 connected in series between the driving power supply 5V and the ground.

Here, the variable resistor 142 is configured such that the user can adjust the resistance value by adjusting the knob 142a.

Accordingly, when the resistance value of the variable resistor 142 is adjusted to be low, the response slope of the output signal of the hall sensor 110 is relaxed to reduce the sensitivity. When the resistance value is adjusted to be high, The sensitivity gradient can be increased by raising the response slope to the signal variation.

The second comparator 122 receives the output signal of the differentiator 140, that is, the signal output through the other terminal 141a of the second capacitor 141, through the second inversion terminal 122b, 122a, and outputs the comparison result.

The third comparator 123 receives the output signal of the differentiator 140, that is, the signal output through the other end 141a of the second capacitor 141, through the third non-inverting terminal 123a, With the second reference signal REF2 connected to the terminal 123b, and outputs the comparison result.

Here, the first reference signal REF1 and the second reference signal REF2 are used to apply the detection band range for the output signal of the differentiator 140, and different values are applied, but the output range of the applied differentiator 140 is It is necessary to apply it with care. As an example, when the reference signal determined by the voltage-dividing resistor R3 (R4) is set to 2.5 V and the output signal of the differentiator 140 is 2.4 V or less, or when the magnetic field is not changed, The first reference signal REF1 is set to 2.4V and the second reference signal REF2 is set to 2.6V.

The first notification unit 170 outputs the notification information corresponding to the comparison result of the second comparator 122 and the second notification unit 180 outputs the notification information corresponding to the comparison result of the third comparator 123 do.

First, the first notification unit 170 includes a first switch device 175, a first light emitting device 171, a buzzer 178, and a third capacitor 176.

The first switch element 175 is switched on / off in accordance with a control signal input through the first gate terminal to which a pnp-type transistor is applied.

The first light emitting device 171 is connected between the driving power supply 5V and the first switch device 175 so that the first switching device 175 emits light when the first switching device 175 is turned on.

The buzzer 178 is connected in parallel with the first light emitting device 171 so as to turn on / off the sound in conjunction with the on / off operation of the first light emitting device 171.

The third capacitor 176 is applied to delay the on time of the first light emitting device 171 visually by extending the high signal of the second comparator 122 when the high signal of the second comparator 122 is shortly interrupted, And the other end is connected to the ground.

The first discharge resistor 177 is connected to the first gate terminal at one end and to the ground at the other end so as to discharge the energy charged in the third capacitor 176. Here, the reaction signal extension time is determined according to the resistance value of the first discharge resistor 177.

When the output signal of the second comparator 123 is switched to the high level, the first switching element 175 is turned on and the first light emitting element 171 and the buzzer 178 also emit light and sound do. Further, when the output signal of the second comparator 123 is switched from the high level to the low level, the delay time after the delay time is determined by the time constant determined by the third capacitor 176 and the first discharge resistor 177 The first light emitting device 171 and the buzzer 178 are turned off. Here, the influence of the current limiting resistive element 173 on the first switch element 175 is eliminated in order to avoid the complexity of the explanation.

The second notification unit 180 has the same configuration as that of the first notification unit 170 except for the buzzer 178.

That is, the second notification unit 180 includes a second switch element 185, a second light emitting element 181, a fourth capacitor 186, and a second discharge resistor 187.

The second switch element 175 is connected to the output terminal of the third comparator 123 via the current limiting resistive element 183 to be switched on / off in accordance with a control signal inputted through the second gate terminal.

The second light emitting device 181 is connected between the driving power supply 5V and the second switch device 185 so as to emit light when the second switching device 185 is turned on.

The fourth capacitor 186 and the second discharge resistor 187 extend the short time of the high signal of the third comparator 123 to visually change the on time of the second light emitting element 181 It is applied to delay.

Emitting diodes such as a red light emitting diode and a green light emitting diode that output light of different colors from the first light emitting device 171 and the second light emitting device 181 can be applied.

Hereinafter, results of simulation and experiments for such a device 100 will be described.

First, the result of simulating the circuit applied in FIG. 2 through the PSpice is shown in FIG.

3, the input from the Hall sensor 100 rises when a magnetic field of the N pole is applied with a reference of 2.55 V, and falls when a magnetic field of the S pole is applied. Respectively. The differential waveform from the first first comparator 121 and the second capacitor 141 is shown in the second waveform of FIG. 3 and is inverted amplified and then falls when the signal of the Hall sensor 110 rises and rises when it falls Can be seen. The reason why the signal of the hall sensor 110 is not used as it is, is that the signal of the hall sensor 110 is very small and is too unstable to detect and monitor the magnetic field only by the magnitude of the signal. Therefore, It is for understanding.

On the other hand, even if the change of the Hall sensor 110 occurs instantaneously at the output, the change must be visible. Therefore, the light emitting devices 171 and 181 can be turned on for more than 60 ms by adding the above-described circuit so that the instantaneous change can be extended for a long time. The waveforms output to the first and second light emitting devices 171 and 181 when the Hall sensor 110 signal is finally 50 ms through this circuit are shown in the lower graph of FIG.

On the other hand, FIG. 4 shows a simulation result when the hall sensor 110 signal continuously changes at a short interval of 20 ms. As can be seen from FIG. 4, it can be seen that the two outputs are superimposed. At this time, it can be seen that the two light emitting devices 171 and 181 are turned on at the same time and the signal changes rapidly.

<Experimental Example>

In order to test the performance of the apparatus 100, the Hall sensor 110 was a product named WSH-136. The hall sensor 110 has a characteristic that the voltage changes linearly with the amount of magnetic flux based on 2.55 V and has a sensitivity of 3.3 mV / G. The solenoid actuator magnetically operated on the manufactured monitoring apparatus 100 was driven at 2.5 Hz and the Hall sensor probe 103 thus manufactured was measured at a distance of about 5 mm from the solenoid actuator, 7.

As can be seen from FIGS. 5 to 7, the experimental results were very similar to the simulation results, and the magnetic field generated in the solenoid was detected to accurately show the actuator operating at a cycle of about 2.5 Hz.

In other words, it can be seen from this experimental result that the present apparatus 100 can accurately and precisely measure weak signals of the hall sensor 110 and its fluctuations.

Such a device 100 can be used not only to detect whether the device operates as a coil in a non-contact manner without peeling off the coating of electric wire, but also to a device that generates a magnetic field by operation in fields other than automobiles Contactless inspection of the operation of the &lt; / RTI &gt;

101: main body 103: probe
110: hall sensor

Claims (5)

delete A Hall sensor;
A delay unit for delaying an output signal of the Hall sensor;
A first comparator for receiving an output signal of the hall sensor and a signal passed through the delay unit through a first non-inverting terminal for comparison and a first inverting terminal, respectively, for amplifying and outputting a comparison result;
A differentiator connected to an output terminal of the first comparator;
A second comparator that receives the output signal of the differentiator through a second inverting terminal and compares the output signal with a first reference signal connected to a second non-inverting terminal, and outputs a comparison result;
A third comparator that receives the output signal of the differentiator via a third non-inverting terminal, compares it with a second reference signal connected to the third inverting terminal, and outputs a comparison result;
A first notification unit for outputting notification information corresponding to a comparison result of the second comparator;
And a second notification unit for outputting notification information corresponding to the comparison result of the third comparator,
The delay unit
A first capacitor connected between the first inverting terminal and the ground,
The differentiator
A second capacitor whose one end is connected to the output terminal of the first comparator;
And a variable resistor connected in series between the other end of the second capacitor and the ground, the variable resistor being capable of varying a resistance value,
Wherein the variable resistor is adapted to allow a user to adjust a resistance value. 3. The apparatus of claim 2, wherein the first notification unit
A first comparator having a first comparator and a second comparator;
And a buzzer connected to on / off of the first light emitting device to output sound on / off. 4. The apparatus of claim 3, wherein the first notification unit
A first switch element which is switched on / off in accordance with a control signal inputted through a first gate terminal;
A third capacitor having one end connected to the output terminal of the second comparator and the other end connected to the ground;
And a first discharging resistor having one end connected to the first gate terminal and the other end connected to ground so as to discharge energy charged in the third capacitor,
Wherein the first light emitting device is connected between the driving power source and the first switch device so that the first light emitting device is caused to emit light when the first switching device is turned on. 5. The apparatus of claim 4, wherein the second notification unit
A second switch element that is switched on / off in accordance with a control signal input through a second gate terminal;
A fourth capacitor having one end connected to the output terminal of the third comparator and the other end connected to the ground;
A second discharge resistor having one end connected to the second gate terminal and the other end connected to ground to discharge energy charged in the fourth capacitor;
And a second light emitting element connected between the driving power source and the second switch element so that the second switch element is turned on when the second switch element is turned on.

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