CN111307184A - Non-contact magnetic switch displacement measuring device and displacement sensor and magnetic induction measuring circuit thereof - Google Patents
Non-contact magnetic switch displacement measuring device and displacement sensor and magnetic induction measuring circuit thereof Download PDFInfo
- Publication number
- CN111307184A CN111307184A CN202010141892.2A CN202010141892A CN111307184A CN 111307184 A CN111307184 A CN 111307184A CN 202010141892 A CN202010141892 A CN 202010141892A CN 111307184 A CN111307184 A CN 111307184A
- Authority
- CN
- China
- Prior art keywords
- circuit
- magnetic induction
- displacement
- magnetic
- resistor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/25—Selecting one or more conductors or channels from a plurality of conductors or channels, e.g. by closing contacts
- G01D5/251—Selecting one or more conductors or channels from a plurality of conductors or channels, e.g. by closing contacts one conductor or channel
- G01D5/2515—Selecting one or more conductors or channels from a plurality of conductors or channels, e.g. by closing contacts one conductor or channel with magnetically controlled switches, e.g. by movement of a magnet
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
Abstract
A non-contact magnetic switch displacement measuring device comprises a moving part and a fixed part, wherein a permanent magnet is fixed on the moving part, a magnetic induction measuring circuit and a conditioning amplifying circuit are installed on the fixed part, and the permanent magnet, the magnetic induction measuring circuit and the conditioning amplifying circuit form a displacement sensor. The magnetic induction measuring circuit is used for converting the displacement change of the permanent magnet into corresponding resistance value change and outputting corresponding displacement electric signals, the magnetic induction measuring circuit comprises a first line and a second line which are arranged side by side, a plurality of resistors RI with the same resistance value are connected in series on the first line, and the magnetic switch unit comprises a magnetic switch and a photoelectric coupler. The magnetic induction measuring circuit is composed of a switch unit consisting of a photoelectric coupler controlled by a magnetic switch, a resistor and other small and cheap components, has the advantages of simple structure, stable performance, small volume, low price, shock resistance, convenient installation and maintenance, and is suitable for measuring occasions which are inconvenient to use and measure in a contact manner, have relative motion, have large noise and have low requirement on measuring precision.
Description
Technical Field
The invention relates to the field of mining measurement, in particular to a non-contact magnetic switch displacement measuring device, a displacement sensor and a magnetic induction measuring circuit thereof.
Background
Conventional displacement sensors generally include either reed-type or magnetostrictive type displacement sensors. The reed switch of the reed switch displacement sensor is easy to damage due to electric shock; the magnetostrictive sensor has large distributed capacitance, is difficult to realize an intrinsically safe circuit, requires low noise, and has large volume, high price and high later maintenance cost.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides a non-contact magnetic switch displacement measuring device, a displacement sensor and a magnetic induction measuring circuit thereof, wherein the non-contact magnetic switch displacement measuring device is small in size, simple in structure, stable in performance and low in price.
The technical problem to be solved by the invention is realized by the following technical scheme, and the magnetic induction measuring circuit is characterized in that: including the first circuit and the second circuit that set up side by side the first circuit on establish ties and have a plurality of resistance RI, be equipped with a plurality of magnetic switch unit with resistance RI one-to-one between first circuit and second circuit, magnetic switch unit one end be connected with the second circuit, the output of magnetic switch unit is connected with the first circuit of the corresponding tip of the resistance RI that corresponds, the magnetic switch unit include a magnetic switch control's optoelectronic coupler, be connected with resistance RII between output and the first circuit of optoelectronic coupler, the other end and the second circuit.
Another technical problem to be solved by the present invention is achieved by the following technical solution, wherein a displacement sensor comprising the magnetic induction measuring circuit is characterized in that: the magnetic induction measuring circuit is arranged on the circuit board, and the magnetic switches are arranged on the circuit board at equal intervals along the length direction of the circuit board; the circuit board is sleeved with an annular permanent magnet, the permanent magnet is in magnetic induction connection with the magnetic induction measuring circuit, and the output end of the magnetic induction measuring circuit is connected with a conditioning amplifying circuit which is used for amplifying and conditioning displacement electric signals output by the magnetic induction measuring circuit and outputting corresponding conditioning signals.
The technical problem to be solved by the invention can be further realized by the following technical scheme that the circuit board of the magnetic induction measuring circuit is a strip-shaped rigid circuit board.
The technical problem to be solved by the invention can be further realized by the following technical scheme that the circuit board of the magnetic induction measuring circuit is an annular flexible circuit board.
The technical problem to be solved by the invention can be further realized by the following technical scheme that the conditioning amplifying circuit comprises a resistor RIII, a resistor RIV, a resistor RV, a capacitor and an operational amplifier, wherein one end of the resistor RIII is connected with the output end of the magnetic induction measuring circuit, and the other end of the resistor RIII is grounded; one end of the resistor IV is connected with the output end of the magnetic induction measuring circuit, and the other end of the resistor IV is connected with the homodromous input end of the operational amplifier; one end of the capacitor is connected with the output end of the magnetic induction measuring circuit, and the other end of the capacitor is grounded; the inverting input end of the operational amplifier is connected with the output end of the operational amplifier, and the output end of the operational amplifier is connected with the input end of an A/D acquisition circuit; one end of the resistor V is connected with the output end of the operational amplifier, and the other end of the resistor V is grounded.
Another technical problem to be solved by the present invention is achieved by the following technical solution, in which a non-contact magnetic switch displacement measuring device including any one of the above displacement sensors is characterized in that: the permanent magnet is arranged on the moving part, and the magnetic induction measuring circuit and the conditioning amplifying circuit are arranged on the fixing part.
The technical problem to be solved by the invention can be further realized by the following technical scheme, and the measurement range of the displacement is 0.1-200 m.
Compared with the prior art, the magnetic induction measuring circuit consists of a switch unit consisting of a photoelectric coupler controlled by a magnetic switch, a resistor and other small and cheap components, so the magnetic induction measuring circuit has the advantages of simple structure, stable performance, small volume, low price, shock resistance, convenient installation and maintenance, and is particularly suitable for measuring occasions which are inconvenient to use and measure in a contact manner, have relative movement, have large noise and have low measuring precision requirement.
Drawings
FIG. 1 is a schematic structural diagram of a displacement measuring device of a non-contact magnetic switch;
FIG. 2 is an enlarged view of portion A of FIG. 1;
fig. 3 is a conditioning amplifying circuit diagram.
Detailed Description
The following further describes particular embodiments of the present invention to facilitate further understanding of the present invention by those skilled in the art, and does not constitute a limitation to the right thereof.
The utility model provides a magnetic induction measuring circuit, includes first circuit 2 and second circuit 7 that set up side by side first circuit 2 establish ties and have the same resistance RI 8 of a plurality of resistance, be equipped with a plurality of magnetic switch unit with resistance RI 8 one-to-one between first circuit 2 and second circuit 7, magnetic switch unit include 3 controlled optoelectronic couplers 5 of a magnetic switch, the output of optoelectronic couplers 5 and the first circuit 2 of the corresponding tip of resistance RI 8 that corresponds are connected with resistance RII 4 between the other end and the second circuit 7.
A displacement sensor comprising the magnetic induction measuring circuit comprises a circuit board, wherein the magnetic induction measuring circuit is arranged on the circuit board, and magnetic switches are arranged on the circuit board at equal intervals along the length direction of the circuit board; the circuit board is sleeved with an annular permanent magnet 1, the permanent magnet 1 is connected with a magnetic induction measuring circuit in a magnetic induction mode, and the output end of the magnetic induction measuring circuit is connected with a conditioning amplifying circuit 5 which is used for amplifying and conditioning displacement electric signals output by the magnetic induction measuring circuit and outputting corresponding conditioning signals.
The circuit board of the magnetic induction measuring circuit is a strip-shaped hard circuit board.
The circuit board of the magnetic induction measuring circuit is an annular flexible circuit board.
The conditioning amplifying circuit 5 comprises a resistor RIII 51, a resistor RIV 52, a resistor RV 54, a capacitor 55 and an operational amplifier 53, wherein one end of the resistor RIII 51 is connected with the output end of the magnetic induction measuring circuit, and the other end of the resistor RIII 51 is grounded; one end of the resistor IV 52 is connected with the output end of the magnetic induction measuring circuit, and the other end of the resistor IV is connected with the homodromous input end of the operational amplifier 53; one end of the capacitor 55 is connected with the output end of the magnetic induction measuring circuit, and the other end is grounded; the inverting input end of the operational amplifier 53 is connected with the output end thereof, and the output end of the operational amplifier 53 is connected with the input end of an A/D acquisition circuit; one end of the resistor v 54 is connected to the output end of the operational amplifier 53, and the other end is grounded.
A non-contact magnetic switch displacement measuring device comprising the displacement sensor comprises a moving part 9 and a fixing part 6, wherein a permanent magnet 1 is arranged on the moving part 9, and a magnetic induction measuring circuit and a conditioning amplifying circuit 5 are arranged on the fixing part 6.
The displacement measuring range is 0.1 m-200 m.
Referring to fig. 1-3, the non-contact magnetic switch displacement measuring device of the present invention includes a moving part 9 and a fixed part 6, wherein a permanent magnet 1 is fixed on the moving part 9, and a magnetic induction measuring circuit and a conditioning amplifying circuit 5 are installed on the fixed part 6, wherein the permanent magnet 1, the magnetic induction measuring circuit and the conditioning amplifying circuit 5 form a displacement sensor. Wherein, the magnetic induction measuring circuit is used for converting the displacement change of the permanent magnet into corresponding resistance value change (namely the resistance value corresponds to the displacement amount, and the increase and decrease of the resistance value corresponds to the displacement direction), outputting corresponding displacement electric signals, the magnetic induction measuring circuit comprises a first circuit and a second circuit which are arranged side by side, a plurality of resistors RI 8 with the same resistance value are connected in series on the first circuit, a magnetic switch unit comprises a photoelectric coupler controlled by a magnetic switch, all the magnetic switches are uniformly distributed on a circuit board at equal intervals, the interval can be adjusted according to the measurement precision requirement, the smaller the magnetic switch interval is, the higher the measurement precision is, the measuring range is usually 0.1 m-200 m, but how to adjust the spacing of the magnetic switches among all the magnetic switch units always ensures that at most one photoelectric coupler controlled by the magnetic switch is conducted when the permanent magnet moves to a certain position in the stroke range. The conditioning amplifying circuit 5 is connected with the output end of the magnetic induction measuring circuit, and is used for amplifying and conditioning the displacement electric signal output by the magnetic induction measuring circuit and outputting a corresponding conditioning signal, the conditioning amplifying circuit comprises a resistor RIII 51, a resistor RIV 52, a resistor RV 54, a capacitor 55 and an operational amplifier 53, the acquisition circuit converts the digital displacement signal output by the A/D acquisition circuit at the current moment into a corresponding absolute displacement according to a formula delta S (So- (Vi-Vo)/Vo, wherein So is the displacement of an initial position, Vi is a power supply voltage VCC, Vo is the digital displacement signal at the current moment, and delta S is the absolute displacement at the current moment.
When the permanent magnet moves, the output end of the corresponding magnetic switch unit which is formed by photoelectric coupling controlled by the magnetic switch is switched on when the permanent magnet is close to the magnetic switch and switched off when the permanent magnet is far away from the magnetic switch, so that the displacement change of the permanent magnet is converted into the corresponding resistance value change, the corresponding displacement electric signal is output, and the displacement electric signal is processed by the conditioning and amplifying circuit in sequence to generate analog displacement data.
The non-contact magnetic switch displacement measuring device can be arranged into a strip-shaped linear displacement measuring device or an annular angular displacement measuring device, wherein when the non-contact magnetic switch displacement measuring device is arranged into the linear displacement measuring device, the magnetic induction measuring circuit can be integrated on a common rigid circuit board, and when the angular displacement measuring device is arranged, the magnetic induction measuring circuit can be integrated on a flexible circuit board. The non-contact magnetic switch displacement measuring device does not limit the shape of the magnetic induction measuring circuit, the shape of the magnetic induction measuring circuit tracks the motion track of the permanent magnet or the moving end, and if the motion track of the permanent magnet or the moving end is spiral, the magnetic induction measuring circuit is matched and arranged into a corresponding spiral shape.
The above examples are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
Claims (7)
1. A magnetic induction measurement circuit, characterized by: including the first circuit and the second circuit that set up side by side the first circuit on establish ties and have the same resistance RI of a plurality of resistance, be equipped with a plurality of magnetic switch unit with resistance RI one-to-one between first circuit and second circuit, the magnetic switch unit include a magnetic switch controlled optoelectronic coupler, be connected with resistance RII between the output of optoelectronic coupler and the first circuit connection, the other end and the second circuit of the resistance RI's that corresponds tip that corresponds.
2. A displacement sensor incorporating the magnetic induction measurement circuit of claim 1, wherein: the magnetic induction measuring circuit is arranged on the circuit board, and the magnetic switches are arranged on the circuit board at equal intervals along the length direction of the circuit board; the circuit board is sleeved with an annular permanent magnet, the permanent magnet is in magnetic induction connection with the magnetic induction measuring circuit, and the output end of the magnetic induction measuring circuit is connected with a conditioning amplifying circuit which is used for amplifying and conditioning displacement electric signals output by the magnetic induction measuring circuit and outputting corresponding conditioning signals.
3. The displacement sensor of claim 3, wherein: the circuit board of the magnetic induction measuring circuit is a strip-shaped hard circuit board.
4. The displacement sensor of claim 3, wherein: the circuit board of the magnetic induction measuring circuit is an annular flexible circuit board.
5. The displacement sensor of claim 3, wherein: the conditioning amplifying circuit comprises a resistor RIII, a resistor RIV, a resistor RV, a capacitor and an operational amplifier, wherein one end of the resistor RIII is connected with the output end of the magnetic induction measuring circuit, and the other end of the resistor RIII is grounded; one end of the resistor IV is connected with the output end of the magnetic induction measuring circuit, and the other end of the resistor IV is connected with the homodromous input end of the operational amplifier; one end of the capacitor is connected with the output end of the magnetic induction measuring circuit, and the other end of the capacitor is grounded; the inverting input end of the operational amplifier is connected with the output end of the operational amplifier, and the output end of the operational amplifier is connected with the input end of an A/D acquisition circuit; one end of the resistor V is connected with the output end of the operational amplifier, and the other end of the resistor V is grounded.
6. A non-contact magnetic switch displacement measuring device incorporating the displacement sensor according to any one of claims 2 to 5, characterized in that: the permanent magnet is arranged on the moving part, and the magnetic induction measuring circuit and the conditioning amplifying circuit are arranged on the fixing part.
7. The non-contact magnetic switch displacement measurement device of claim 6, wherein: the displacement measuring range is 0.1 m-200 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010141892.2A CN111307184A (en) | 2020-03-04 | 2020-03-04 | Non-contact magnetic switch displacement measuring device and displacement sensor and magnetic induction measuring circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010141892.2A CN111307184A (en) | 2020-03-04 | 2020-03-04 | Non-contact magnetic switch displacement measuring device and displacement sensor and magnetic induction measuring circuit thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111307184A true CN111307184A (en) | 2020-06-19 |
Family
ID=71158549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010141892.2A Pending CN111307184A (en) | 2020-03-04 | 2020-03-04 | Non-contact magnetic switch displacement measuring device and displacement sensor and magnetic induction measuring circuit thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111307184A (en) |
-
2020
- 2020-03-04 CN CN202010141892.2A patent/CN111307184A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102135410A (en) | Non-contact displacement measuring device as well as sensor and magnetic induction measuring circuit thereof | |
| US5929631A (en) | Method of position sensing utilizing giant magneto resistance elements and solid state switch array | |
| CN103308075B (en) | Current output-type linear hall-effect sensor | |
| CN201724652U (en) | Hall linear micro-distance sensor | |
| CN101499794A (en) | Capacitor induction type touch press-key and measuring method for touch press-key capacitor | |
| CN204085446U (en) | Magnetic sensitive angle sensor | |
| CN212082406U (en) | Magnetic switch displacement measuring device and displacement sensor and magnetic induction measuring circuit thereof | |
| CN111307184A (en) | Non-contact magnetic switch displacement measuring device and displacement sensor and magnetic induction measuring circuit thereof | |
| CN202501823U (en) | Long stroke linear displacement non-contact measuring device | |
| CN203323928U (en) | Piezoresistive pressure transmitter | |
| Suh et al. | Finger motion detection glove toward human-machine interface | |
| CN103808244A (en) | Magnetic encoder for position measurement | |
| CN218158138U (en) | Electrostatic detection device | |
| CN219798363U (en) | Wear detection device and head-mounted equipment | |
| JP4747224B1 (en) | Inductance change detection circuit, displacement detection device, and metal detection device | |
| CN208999970U (en) | A kind of displacement sensor, detection device and the electronic equipment with it | |
| CN201163766Y (en) | Oscillation type capacitance induction touch press key | |
| CN2055253U (en) | Precise constant-current source type thermal resistance temp. transducer | |
| CN201285411Y (en) | Graded DC signal tri-terminal isolation measurement apparatus for remote measuring system | |
| CN201163764Y (en) | Capacitance induction type touch press key based on MCU | |
| CN113533772A (en) | Motion sensing simulator | |
| CN217505945U (en) | Multifunctional acquisition device | |
| CN204514498U (en) | A kind of temperature sensing circuit for gas meter, flow meter | |
| CN204705842U (en) | A kind of Mine-used I. S lifting jack is flexible measures displacement transducer control circuit | |
| CN201476872U (en) | integrated vibration transmitter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |