JP2008057515A - Output voltage determination method of pickup sensor, and its device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of determining the output voltage of a pickup sensor without starting an engine; and its device. <P>SOLUTION: This device determining the output voltage of the pickup sensor 1 arranged in the vicinity of a rotating body 2 is provided with: a magnetic force generating coil 4 detachably formed on the rotating body 2; and a pulse generator 3 applying a pulse voltage to the coil 4. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method and apparatus for determining an output voltage of a pickup sensor used in an engine controller or the like.

The pickup sensor is used in an engine controller or the like, and generates a voltage according to the unevenness of a detection object that rotates or intermittently moves to detect rotation and phase.
If this pickup sensor is deteriorated, it will cause the engine to not start normally, so it is necessary to check the deterioration state of the pickup sensor during maintenance. The deterioration state of the pickup sensor is determined by whether or not the output voltage of the pickup sensor satisfies a predetermined condition. Conventionally, this output voltage is measured by a jig that measures the peak voltage while the engine is in a test run. This is done by measuring.
For example, in a gas engine controller, nine pickup sensors (PHASE sensors) are arranged in the vicinity of a flywheel, and the deterioration state of the pickup sensor is examined by measuring a peak voltage. During maintenance, if the measured peak voltage is less than the specified value, the pickup sensor is replaced to prevent engine start failure.

On the other hand, a device for diagnosing deterioration of a relay coil by supplying a pulse voltage to the relay coil as a device for diagnosing deterioration of the relay coil provided in the elevator control panel is disclosed (Patent Document 1).
JP-A-9-26451

As described above, when investigating the deterioration state of the pickup sensor, a jig for measuring the peak voltage of the pickup sensor is used, but it is necessary to start the engine and rotate the flywheel to detect the peak voltage. . That is, measurement can be performed by starting the engine, but measurement cannot be performed without moving the engine.
In addition, since the engine needs to be started, labor, time, and cost for engine test operation and maintenance are a heavy burden.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a method and an apparatus for determining an output voltage of a pickup sensor without starting an engine.

  In order to solve the above-described problem, in the present invention, an apparatus for determining an output voltage of a pickup sensor arranged in the vicinity of a rotating body, the coil for generating magnetic force detachably formed on the rotating body, There is provided a pickup sensor output voltage determination device comprising a pulse generator for applying a pulse voltage to the coil.

  According to another aspect of the present invention, there is provided a method for determining an output voltage of a pickup sensor disposed in the vicinity of a rotator, the step of attaching a coil for generating magnetic force to the rotator, Arranging magnetic force generated in the coil at a position where it can be detected by the pickup sensor, applying a pulse voltage to the coil, and measuring an output voltage of the pickup sensor generated by the magnetic force generated in the coil A method for determining an output voltage of a pickup sensor is provided.

  Moreover, the output voltage determination apparatus of the pick-up sensor which concerns on this invention is formed so that the said rotary body may be a flywheel and the said coil may be attached to the tooth | gear of the said flywheel as one Embodiment.

  As another embodiment, the output voltage determination device for a pickup sensor according to the present invention is a detected body in which the rotating body is inserted into a cam shaft, and the coil is attached to the tip of the detected body. It is formed as follows.

  According to another aspect of the present invention, there is provided an apparatus for determining an output voltage of a pickup sensor disposed in the vicinity of a rotating body, wherein three or more coils for generating magnetic force arranged in parallel with each other, and the coil A pulse generator for applying a pulse voltage to the coil, and a fixture for supporting the coil. The coil is moved by the fixture, and the magnetic force generated by the coil is detected by the pickup sensor. A pickup sensor output voltage determination device that can be arranged is provided.

  As another aspect of the present invention, there are provided three or more magnetic force generating coils arranged in parallel to each other, a pulse generator for applying a pulse voltage to the coils, and a mounting base for mounting the pickup sensor. A pickup sensor, wherein when the pickup sensor is attached to the mounting base, the coil is in the vicinity of the pickup sensor and is in a position where the magnetic force generated by the coil can be detected by the pickup sensor. An output voltage determination device is provided.

  Furthermore, as another aspect of the present invention, a step of attaching a pickup sensor in the vicinity of the coil, a step of sequentially applying a pulse voltage to three or more coils for generating magnetic force arranged in parallel with each other, and generation in the coil And a method for determining an output voltage of the pickup sensor, the method including a step of measuring an output voltage of the pickup sensor generated by the generated magnetic force.

  As described above, an output voltage determination device for a pickup sensor according to the present invention includes a magnetic force generating coil that is detachably attached to a predetermined rotating body, and a pulse generating device that applies a pulse voltage to the coil. By applying a pulse voltage to the coil, a magnetic force that simulates the unevenness of the detected object that rotates or intermittently moves is generated, and this magnetic force is detected by the pickup sensor. . As a result, the output voltage of the pickup sensor can be determined without starting the engine and operating the detected object of the pickup sensor.

  Furthermore, since the output voltage determination device for a pickup sensor according to the present invention does not need to start the engine, it is possible to significantly reduce the labor, time and cost required for engine test operation and maintenance.

  An output voltage determination device for a pickup sensor according to the present invention includes three or more magnetic force generating coils arranged in parallel to each other, a pulse generator for applying a pulse voltage to the coils, and a support for the coils. Since the magnetic force generating coil is attached to the fixture, the coil can be freely arranged in the vicinity of the pickup sensor by moving the fixture. Further, it is possible to save the trouble of attaching the coil to the detection object.

  An output voltage determination device for a pickup sensor according to the present invention includes three or more magnetic force generating coils arranged in parallel to each other, a pulse generator for applying a pulse voltage to the coils, and a mounting base for mounting the pickup sensor. By applying a pulse voltage sequentially to three or more coils for generating magnetic force, the magnetic force that more accurately simulates the unevenness of the detected object rotating or intermittently moving is detected. The reliability of the determination of the output voltage of the pickup sensor is improved. In addition, since a mounting base for mounting the pickup sensor is provided, it is possible to check the deterioration state even when the pickup sensor is detached from the engine.

  Hereinafter, the present invention will be described in detail based on illustrated embodiments.

FIG. 1 is a diagram showing the configuration of the first embodiment of the present invention. The present embodiment is applied to a pickup sensor 1 that generates a voltage according to the unevenness of a rotating flywheel 2 in an engine.
The output voltage determination device for a pickup sensor according to the present embodiment includes a magnetic force generating coil 4 detachably formed on the flywheel 2 and a pulse generating device 3 that applies a pulse voltage to the coil 4.
The pickup sensor 1 has a built-in coil (not shown) for voltage generation, and is disposed in the vicinity of the flywheel 2 (for example, at a position of 1 to 2 mm from the tooth 2a).
The coil 4 is attached to the tooth 2 a of the flywheel 2 and is arranged at a position where the magnetic force generated by the coil 4 can be detected by the pickup sensor 1 (that is, the front position of the pickup sensor 1).

  FIG. 2 shows the configuration of the pulse generator 3. The pulse generator 3 includes a waveform table 3a that records waveform information of the pulse voltage applied to the coil 4, and a waveform setting device that sets the waveform of the pulse voltage. 3b, a power supply unit 3c that supplies a voltage, and a pulse generation circuit 3d that generates a pulse voltage. In the waveform table 3a, waveform information of pulse voltage for simulating a state in which the unevenness of the flywheel 2 passes near the pickup 1 is recorded.

Next, a method for determining the output voltage of the pickup sensor 1 in the present embodiment will be described.
First, the coil 4 is attached to the teeth 2 a of the flywheel 2, the flywheel 2 is rotated by inching or manual operation, and the magnetic force generated by the coil 4 is arranged at a position where the pickup sensor 1 can detect the magnetic force.
Next, a pulse voltage is applied to the coil 4 using the pulse generator 3. Here, in the pulse generation device 3, the waveform information recorded in the waveform table 3a is set in the pulse generation circuit 3d via the waveform setting device 3b, and the pulse generation circuit 3d outputs a pulse voltage. When a pulse voltage is applied to the coil 4 by the pulse generator 3, a magnetic force is generated in the coil 4. The pickup sensor 1 generates a magnetic force. The magnetic force generated from the pickup sensor 1 is changed by the magnetic force generated in the coil 4, and a voltage is generated in the coil in the pickup sensor 1.
Finally, the peak voltage of this voltage is measured to determine whether the peak voltage is equal to or higher than a specified value. Here, the peak voltage is the maximum voltage generated in the coil in the pickup sensor 1.
By the above procedure, the output voltage of the pickup sensor 1 is determined and the deterioration state is examined. Here, when the peak voltage is lower than the specified value, the pickup sensor is replaced.

Thus, according to the output voltage determination apparatus and determination method for the pickup sensor of the first embodiment, the unevenness of the rotating flywheel 2 is obtained by applying the pulse voltage to the coil 4 attached to the tooth 2a of the flywheel 2. By generating a magnetic force that simulates the above, and detecting this magnetic force with the pickup sensor 1, the output voltage of the pickup sensor 1 can be determined without starting the engine.
In addition, since it is not necessary to start the engine, it is possible to reduce the commissioning cost of the engine and the maintenance cost.

FIG. 3 is a diagram showing the configuration of the second embodiment of the present invention, and FIG. 4 is a diagram of the configuration of FIG. 3 viewed from the side. This embodiment is applied to a pickup sensor 1 that detects the rotation of a shaft 6 inserted into a camshaft 5 and generates a voltage in an engine.
In the present embodiment, a magnetic force generating coil 4 detachably formed at a tip portion of a shaft 6 inserted into a cam shaft 5 of a flywheel 2, and a pulse generating device 3 for applying a pulse voltage to the coil 4, It has.
The pickup sensor 1 has a built-in coil (not shown) for generating a voltage, and is disposed in the vicinity of the shaft 6 (for example, a position with a distance of 1 to 2 mm from the tip of the shaft 6).
The coil 4 is attached to the tip of the shaft 6 that is a detection object, and the magnetic force generated by the coil 4 can be detected by the pickup sensor 1 by rotating the shaft 6 manually or by inching. Has been placed.

  Here, the pulse generator 3 may be the same device as in the first embodiment, and the description thereof is omitted. In the waveform table 3a, waveform information for simulating a state in which the shaft 6 passes near the pickup sensor 1 by the rotation of the cam shaft 5 is recorded.

Thus, according to the output voltage determination device for the pickup sensor of the second embodiment, the shaft 6 is rotated by the rotation of the cam shaft 5 by applying the pulse voltage to the coil 4 attached to the tip portion of the shaft 6. By generating a magnetic force that simulates passing through the vicinity of 1 and detecting this magnetic force with the pickup sensor 1, the output voltage of the pickup sensor 1 can be determined without starting the engine.
In addition, since it is not necessary to start the engine, it is possible to reduce the commissioning cost of the engine and the maintenance cost.

FIG. 5 is a diagram showing the configuration of the third exemplary embodiment of the present invention. As in the second embodiment, the present embodiment is applied to the pickup sensor 1 that detects the rotation of the shaft 6 inserted into the cam shaft 5 and generates a voltage.
In the present embodiment, three magnetic force generating coils 4a, 4b, and 4c arranged in parallel to each other, a pulse generator 3 that applies a pulse voltage to the coils 4a, 4b, and 4c, and the coils 4a, 4b, and 4c. And a fixture 7 for supporting the.
The pickup sensor 1 incorporates a voltage generating coil (not shown) and is disposed in the vicinity of the shaft 6.
Then, the shaft 6 can be rotated in the distance of the pickup sensor 1 by inching or manual operation in the future, and the magnetic force generated in the coils 4a, 4b, 4c can be detected by the pickup sensor 1 by the fixture 7 with the coils 4a, 4b, 4c. Place it in a proper position.

  The pulse generator 3 may be the same device as in the first embodiment, and includes a waveform table 3a that records the waveform information of the pulse voltage applied to the coil 4, and a waveform setting device 3b that sets the waveform of the pulse voltage. And a power supply unit 3c for supplying a voltage and a pulse generation circuit 3d for generating a pulse voltage. In the waveform table 3a, waveform information for each of the coils 4a, 4b, and 4c is recorded.

  Thus, according to the output voltage determination device for the pickup sensor of the third embodiment, the coils 4 a, 4 b, 4 c can be freely arranged in the vicinity of the pickup sensor 1 by the fixture 7.

FIG. 6 is a diagram showing the configuration of the fourth exemplary embodiment of the present invention. This embodiment is applied when the output voltage is determined with the pickup sensor 1 removed from the engine.
In the present embodiment, three magnetic force generating coils 4a, 4b and 4c arranged in parallel to each other, a pulse generator 3 for applying a pulse voltage to the coils 4a, 4b and 4c, and the pickup sensor 1 are attached. The mounting base 8 is provided.
The pickup sensor 1 is removed from the engine and attached to the mounting base 8.
The coils 4a, 4b, and 4c are in the vicinity of the pickup sensor 1, and are positions where the magnetic force generated by the coils 4a, 4b, and 4c can be detected by the pickup sensor 1 (for example, a distance of 1-2 mm from the tip of the pickup sensor 1). ). The central coil 4b has a larger diameter or number of turns than the coils 4a and 4c, and is configured to generate a larger magnetic force than the coils 4a and 4c. Thereby, the coil 4b simulates a state in which the tooth 2a of the flywheel 2 passes, and the coils 4a and 4c generate a magnetic force that simulates a state in which the tooth groove 2b of the flywheel 2 passes.

FIG. 7 is a diagram showing pulse voltages applied to the coils 4a, 4b, and 4c and waveforms detected by the pickup sensor. In the present embodiment, when the pulse generating circuit 3d applies a pulse voltage, the coils 4a, 4b and 4c are applied in this order, and a pulse voltage as shown in FIG. 7 is applied.
In the pickup sensor 1, a voltage as shown in FIG. 7 is generated by the magnetic force generated in the coils 4a, 4b, and 4c. Thus, by using the three coils 4a, 4b, 4c for generating magnetic force, it is possible to more accurately simulate the rotation of the teeth 2a of the flywheel 2.

  Thus, according to the output voltage determination device for the pickup sensor of the fourth embodiment, since the mounting base 8 is provided, it is possible to remove the pickup sensor 1 from the engine and check the deterioration state.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications and changes can be made based on the technical idea of the present invention.

In the embodiment of the present invention, the coil 4 is formed in a circular shape. However, a cutout portion that allows voltage to pass through the circular coil may be provided, which facilitates attachment to and removal from the detection target.
As another embodiment of the coil 4, the coil may be formed in a horseshoe shape so that the coil can be attached so as to be sandwiched with respect to the detected object, and can be easily attached to and detached from the detected object. It becomes.
Furthermore, the fixture 7 is not restricted to the form which supports the coil 4 from the bottom, You may make it the form which hangs the coil 4 from the top or supports it from the side.

It is a block diagram which shows the output voltage determination apparatus of the pick-up sensor by 1st Embodiment of this invention. It is a block diagram of the pulse generator in the output voltage determination apparatus of the pick-up sensor of this invention. It is a front view which shows the output voltage determination apparatus of the pick-up sensor by 2nd Embodiment of this invention. It is a side view which shows the output voltage determination apparatus of the pick-up sensor by 2nd Embodiment of this invention. It is a block diagram which shows the output voltage determination apparatus of the pick-up sensor by 3rd Embodiment of this invention. It is a block diagram which shows the output voltage determination apparatus of the pick-up sensor by 4th Embodiment of this invention. It is a graph which shows the pulse voltage applied to each coil, and the detection waveform in a pickup sensor in the output voltage determination apparatus of the pickup sensor by 3rd and 4th embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pickup sensor 2 Flywheel 2a Flywheel tooth 2b Flywheel tooth gap 3 Pulse generator 3a Waveform table 3b Waveform setting device 3c Power supply part 3d Pulse generation circuit 4, 4a, 4b, 4c Coil 5 Camshaft 6 Axis 7 Fixed 8 Mounting base

Claims (7)

An apparatus for determining an output voltage of a pickup sensor arranged in the vicinity of a rotating body,
A magnetic force generating coil detachably formed on the rotating body;
An output voltage determination device for a pickup sensor, comprising: a pulse generator that applies a pulse voltage to the coil. A method for determining an output voltage of a pickup sensor arranged in the vicinity of a rotating body,
Attaching a magnetic force generating coil to the rotating body;
Arranging the coil at a position where the magnetic force generated by the coil can be detected by the pickup sensor;
Applying a pulse voltage to the coil;
Measuring an output voltage of the pickup sensor generated by the magnetic force generated in the coil.   The output voltage determination device for a pickup sensor according to claim 1, wherein the rotating body is a flywheel, and the coil is formed to be attached to a tooth of the flywheel.   2. The pickup sensor output voltage determination device according to claim 1, wherein the rotating body is a detected body inserted into a cam shaft, and the coil is formed to be attached to a tip of the detected body. An apparatus for determining an output voltage of a pickup sensor arranged in the vicinity of a rotating body,
Three or more coils for generating magnetic force arranged in parallel with each other;
A pulse generator for applying a pulse voltage to the coil;
A fixture for supporting the coil,
An output voltage determination device for a pickup sensor, wherein the coil can be arranged by the fixture at a position where the magnetic force generated by the coil can be detected by the pickup sensor. Three or more coils for generating magnetic force arranged in parallel with each other;
A pulse generator for applying a pulse voltage to the coil;
And a mounting base for mounting the pickup sensor,
When the pickup sensor is attached to the mounting base,
The pickup sensor output voltage determination device, wherein the coil is in the vicinity of the pickup sensor and is in a position where the magnetic force generated by the coil can be detected by the pickup sensor. Installing a pickup sensor in the vicinity of the coil;
Sequentially applying a pulse voltage to three or more coils for generating magnetic force arranged in parallel with each other;
Measuring an output voltage of the pickup sensor generated by the magnetic force generated in the coil.

Images