JP2001028101A - Magnetic detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a magnetic detector operable for long time provided with the remote control from an outside and a power saving function. SOLUTION: This magnetic detector is constituted of a magnetic sensor part 200 including a magnetic sensor for detecting magnetic in a direction of uniaxis or more, a signal processing control part 100 and a display part 27. In this case, the magnetic sensor part 200 is constituted of the magnetic sensor 24, an analog signal processing part 25 and a digital signal processing part 26, and the signal processing control part 100 is constituted of a monitor part 14, a power source control part 15, a detection range selecting part 20, a frequency classification filter selecting part 21 and a waveform process filter part 22, and by the monitor part 14, a power ON/OFF control signal 11 from the outside or a detection range selecting control signal 12 or a frequency classification filter control signal 13 is received, then the magnetic detector such as controlling the power source control part 15 and the detection range selecting part 20 or the waveform processing filter part 22 is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetism detecting device for detecting magnetism and outputting the data as magnetic field strength data to the outside, and more particularly to a magnetism detecting device for performing an energy saving operation.

[0002]

2. Description of the Related Art In a conventional magnetic detecting apparatus, for example, when a dry cell or the like is used as a power supply, there is a limit on a time that can be continuously used. On the other hand, when the power saving operation is performed, a method of repeatedly turning on and off the power manually is used as the means.

[0003]

The conventional magnetic detector has the following problems. That is, in order to perform the power saving operation, the power supply is turned on and off manually, which requires time and effort. Further, the main body of the magnetic detection device has no power saving function, and as a result, cannot be used for a long time. In addition, when performing the selection control of the detection range and the selection control of the frequency separation filter for the magnetic sensor unit, the switching has to be performed manually, which requires time and labor.

Accordingly, an object of the present invention is to provide a power saving function to enable long-time operation, and to enable remote control of detection range selection control and frequency separation filter selection control. A detection device is provided.

[0005]

SUMMARY OF THE INVENTION A magnetic detection device according to the present invention supplies power preferentially to parts where power saving is difficult, and supplies power only temporarily, such as various switching functions. Is a magnetic detection device that supplies a minimum amount of power and supplies power only when necessary.

That is, the present invention is a magnetic detection device comprising a magnetic sensor unit, a signal processing control unit, and a display unit, wherein the magnetic sensor unit detects a magnetic field in one or more axes. A signal processing control unit comprising a monitoring unit, a power control unit, a detection range selection unit, a frequency separation filter selection unit, and a waveform processing filter selection unit. The monitoring unit receives a power ON / OFF control signal, a detection range selection control signal, or a frequency separation filter control signal, and receives the power supply control unit, the detection range selection unit, and the frequency separation processing filter. The display unit is a magnetism detection device that controls a selection unit and displays a value of a magnetic field intensity.

Further, according to the present invention, in the magnetic detection device, the monitoring unit receives a power ON / OFF control signal, and controls the power of the signal processing control unit with the power control unit.
This is a magnetic detection device that operates or cancels power.

According to the present invention, a signal processing control unit of the magnetic detection device monitors a change of a detection range selection control signal by a monitoring unit, and stores a change state when there is a change in the signal. When the semiconductor switch is turned on, a controlled power is supplied to the detection range selection unit to activate the operation of the detection range selection unit, and to turn off the semiconductor switch by turning off the semiconductor switch. Device.

Further, according to the present invention, a signal processing control unit of the magnetic detection device monitors a change of a frequency discrimination filter control signal by a monitoring unit, and when there is a change in the signal, stores a change state. When the semiconductor switch becomes conductive, the controlled power is supplied to the frequency separation filter selection unit to activate the operation of the frequency separation filter selection unit, and to turn off the semiconductor switch to turn off the operation. It is a magnetic detection device.

According to the present invention, there is provided the magnetic detection device, wherein both analog data and digital data are transmitted and received to and from each signal line disposed between the magnetic sensor unit and the signal processing control unit. It is.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A magnetic detector according to an embodiment of the present invention will be described below.

FIG. 1 is a block diagram of a magnetic detector according to the present invention. As shown in FIG. 1, the magnetic detection device of the present invention includes a magnetic sensor unit 200, a signal processing control unit 100, and a display unit 27.
It is composed of

The magnetic sensor unit 200 includes a magnetic sensor 2
4, an analog signal processing unit 25, and a digital signal processing unit 26. Here, the magnetic sensor 2
Reference numeral 4 denotes a magnetic sensor that detects magnetism in one or more axes. For example, a flux gate type magnetic sensor configured by winding a quadrature winding around a magnetic toroidal core, or a magnetic sensor configured using a magnetoresistive element is used.

Here, the signal processing control unit 100 comprises a monitoring unit 14, a power control unit 15, a detection range selection unit 20, a frequency separation filter selection unit 21, and a waveform processing filter unit 22. The monitoring unit 14 receives the power ON / OFF control signal 11, the detection range selection control signal 12, or the frequency separation filter control signal 13 from the outside, and the power supply control unit 15, the detection range selection unit 20, It has a function of controlling the filter selection unit 21.

FIG. 2 is a diagram for explaining the functions of the monitoring means and the power supply control unit 15 with respect to the detection range selection control signal 12. FIG. 2A is a main block diagram in a range related to the power supply control function in the signal processing control unit 100. FIG. 2B is a diagram showing a timing chart of a voltage waveform at each circuit connecting portion in the block diagram of FIG. 2A, and FIG. 2C is a block diagram of FIG. FIG. 3 is a diagram showing a timing chart of current consumption in each circuit connection part of FIG.

In FIG. 2A, a detection range selection control signal 1
The change in 2 is monitored by the monitoring unit 14, and when there is a change in the signal, the change state is stored, and the semiconductor switch 31 in the power supply control unit 15 is turned on. When the semiconductor switch 31 is turned on, the waveform in the power supply line section 18 becomes a controlled power supply waveform. As a result, power is supplied to the selection processing section 32, and the operation of the selection signal holding section 33 is set to the operating state.

On the other hand, in the selection processing unit 32, the circuit connection unit 3
In response to the change in the signal waveform of FIG. 4, the internal counter operates to start counting, and is processed by the gate circuit.
At 6, a selection signal is generated. The selection signal at the circuit connection unit 36 is held by the holding signal from the selection processing unit 32, and the voltage waveform at the circuit connection unit 37 becomes the held selection signal.

The signal held in the circuit connection unit 35 releases the change state of the detection range selection control signal 12 stored in the monitoring unit 14 and makes the semiconductor switch 31 non-conductive. As a result, the power to the selection processing unit 32 is turned off, and the selection signal holding unit 33 is in a sleep state (power saving state).

FIG. 2B shows a timing chart of voltage waveforms at respective parts in each circuit in the block diagram of FIG. 2A. In the figure, the voltage waveform of the signal line 34 is the same control signal waveform as the detection range selection control signal 12, and the voltage waveform of the signal line 34 has a falling →
From low level to rising, one cycle is formed.

The controlled voltage waveform on the power supply line 18 corresponds to the power ON-OFF control signal 11 received by the monitoring unit 14.
The voltage changes from zero level to high level to zero level in response to the change in the waveform of

The voltage waveform at the circuit connection unit 36 indicates the result of processing the voltage waveform of the signal line 34 by the selection processing unit 32.

The voltage waveform at the circuit connection section 35 is a signal indicating the end of processing at the selection processing section 32, and forms one cycle of low level → rise → high level → fall → low level.

The voltage waveform on the signal line 37 is a selection signal obtained by holding the voltage waveform at the circuit connection section 36 at the selection signal holding section 33.

FIG. 2C is a diagram showing a timing chart of the current consumption at each circuit connecting portion, and shows the current waveform 18-.
Reference numeral 1 denotes a waveform of current consumption corresponding to a power supply signal waveform on the power supply line 18.

The current waveform 16-1 is the current consumption of the entire magnetism detecting device flowing from the battery 16, and the power supply signal waveform on the power supply line 18 increases within a high voltage time.
During a low voltage, the current value decreases.

FIG. 3 is a diagram showing a control portion of the power supply unit 15. As can be seen from FIG.
The internal switch 4 is controlled by an OFF control signal 11.
The battery 16 is connected to the power supply unit 43 even when 1 is not conducting.

On the other hand, with respect to the power supply to the monitoring unit 14 and the frequency separation filter selection unit 21 by the frequency separation filter control signal 13, the relation of the operation in each block has been described in the case of the detection range selection signal 12. The operation is the same. Therefore, a block diagram and a detailed description related to the frequency separation filter control signal 13 are omitted.

Further, in the present magnetic detection device, both analog data and digital data are exchanged with each signal line disposed between the magnetic sensor unit 200 and the signal processing control unit 100.

[0029]

As described above, according to the present invention, it is possible to provide a power saving function to enable long-term operation, and to enable remote control of detection range selection control and frequency separation filter selection control. The magnetic detection device can be provided.

[Brief description of the drawings]

FIG. 1 is a block diagram of a magnetic detection device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of monitoring means, a power supply, and control in the magnetic detection device of the present invention. 2A is a block diagram, FIG. 2B is a diagram showing a timing chart, and FIG.
FIG. 4 is a diagram showing a timing chart of current consumption.

FIG. 3 is a diagram showing the inside of a power supply control unit of the magnetic detection device according to the embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 11 power ON / OFF control signal 12 detection range selection control signal 13 frequency separation filter selection control signal 14 monitoring unit 15 power supply control unit 16 batteries 17, 18, 19 power supply line 20 detection range selection unit 21 frequency separation filter selection unit 22 waveform processing Filter unit 23 Signal output 24 Magnetic sensor 25 Analog signal processing unit 26 Digital signal processing unit 27 Display unit 31 Semiconductor switch 32 Selection processing unit 33 Selection signal holding unit 34, 37 Signal line 35, 36 Circuit connection unit 41 Internal switch 42 Optical type Semiconductor switch 43 Power supply unit 100 Signal processing control unit 200 Magnetic sensor unit

Claims (5)

[Claims] 1. A magnetic detection device comprising a magnetic sensor unit, a signal processing control unit, and a display unit, wherein the magnetic sensor unit includes: a magnetic sensor for detecting magnetism in one or more axes; The signal processing unit includes a signal processing unit and a digital signal processing unit, and the signal processing control unit includes a monitoring unit, a power control unit, a detection range selection unit, a frequency separation filter selection unit, and a waveform processing filter selection unit. The monitoring unit receives a power ON / OFF control signal, a detection range selection control signal, or a frequency separation filter control signal, and controls the power supply control unit, the detection range selection unit, and the frequency separation processing filter selection unit. The display unit displays the value of the magnetic field strength. 2. The magnetic detecting device according to claim 1, wherein
The magnetism detection device, wherein the monitoring unit receives a power ON / OFF control signal, controls the power of the signal processing control unit with the power control unit, and operates or cancels the power. 3. A signal processing control unit in the magnetic detection device according to claim 1, wherein a monitoring unit monitors a change in the detection range selection control signal, and stores a change state when the signal changes.
When the semiconductor switch in the power supply control unit is turned on, the controlled power is supplied to the detection range selection unit, which activates the operation of the detection range selection unit, and releases the operation by turning off the semiconductor switch. A magnetic detection device. 4. The signal processing control unit in the magnetic detection device according to claim 1, wherein the monitoring unit monitors a change in the frequency discrimination filter control signal, and stores a change state when the signal is changed. When the semiconductor switch becomes conductive, the controlled power is supplied to the frequency separation filter selection unit to activate the operation of the frequency separation filter selection unit, and to turn off the semiconductor switch to turn off the operation. A magnetic detection device characterized by the above-mentioned. 5. The magnetic detection device according to claim 1, wherein analog data or digital data is transmitted / received to / from a signal line disposed between the magnetic sensor unit and the signal processing control unit. A magnetic detection device characterized by the above-mentioned.