CN101836088A - Position detecting device and controller used for the same - Google Patents
Position detecting device and controller used for the same Download PDFInfo
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- CN101836088A CN101836088A CN200980100510A CN200980100510A CN101836088A CN 101836088 A CN101836088 A CN 101836088A CN 200980100510 A CN200980100510 A CN 200980100510A CN 200980100510 A CN200980100510 A CN 200980100510A CN 101836088 A CN101836088 A CN 101836088A
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- 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
- G01D5/14—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 influencing the magnitude of a current or voltage
- G01D5/142—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 influencing the magnitude of a current or voltage using Hall-effect devices
- G01D5/145—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 influencing the magnitude of a current or voltage using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/28—Means for indicating the position, e.g. end of stroke
- F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
- F15B15/2861—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using magnetic means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/28—Means for indicating the position, e.g. end of stroke
- F15B15/2892—Means for indicating the position, e.g. end of stroke characterised by the attachment means
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Actuator (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
A position detecting device has a sensor head (20) provided with a magnetic sensor (24) which outputs an output signal when the sensor senses a magnetic force of a magnet, and the position detecting device detects, outside an actuator main body, the position of a moving member which is movably assembled inside the actuator main body with a magnet. The sensor head (20) is provided with an LED (25) which is turned on corresponding to the position of the moving member. A controller (30) connected to the sensor head (20) through a cable controls to turn on and off the LED (25) based on an output signal outputted from the magnetic sensor (24).
Description
Technical field
The present invention relates to detect the location detecting technology of the position of moving-member, the piston that described moving-member is for example driven by fluid pressure cylinder, described fluid pressure cylinder use fluid pressure or air pressure as actuating medium.
Background technology
Fluid pressure cylinder has cylinder barrel and piston rod, this cylinder barrel contains piston, this piston rod is given prominence to and is attached on the piston to its outside, and wherein piston rod is by providing next by Linear Driving such as the such fluid of pressurized air to cylinder barrel, and described pressurized air is actuating medium.Revolving actuator has the shell that outwards outstanding rotation axis is installed and is comprised in wherein blade or rack piston, and wherein rotation axis is driven by fluid being provided in the shell via blade or rack piston.
Therefore, in order to detect the position that is included in the various actuators (such as cylinder barrel or revolving actuator) automatically, used location detecting apparatus such as the such moving-member of piston.Patent document 1 disclosed location detecting apparatus has sensor head (being sensor block), wherein include sensing (in response to) be attached to the magnetic sensor of magnetic force of the magnet of moving-member, i.e. MR sensor (magnetoresistive element).Sensor head is attached to such as on the such actuator body of cylinder barrel or shell, and detection signal is sent to controller from sensor head.
In the magnetic sensor in being included in sensor head, owing to the size of resistance according to the magnetic field of magnet changes, so magnetic sensor is exported simulating signal according to the position that is attached to the magnet of moving-member.Therefore, when magnet move together along with moving-member and after move to magnetic sensor when sensing in the predetermined detection stroke range of magnetic force, magnetic sensor detects moving-member in detecting stroke range.In addition, magnetic sensor detects the position of moving-member based on the output signal from magnetic sensor.
When magnet was positioned at magnetic sensor in response to the above-mentioned detection stroke range of magnetic force, the light emitting diode (being LED) that is installed in sensor head was lighted by the signal processing circuit that is included in the sensor head.
The prior art document
Patent file
Patent file 1: the open application case 8-334305 of Japanese Patent Laid
Summary of the invention
When having arrived when being set in the position of detecting in the stroke range based on detect moving-member from the output signal of magnetic sensor, controller is to output signals such as external hosts.By controller is installed display unit, can digitally show that about the information of moving-member described display unit is based on the position of passing through to use demonstration moving-members such as numerical value from the output signal of magnetic sensor by controller with respect to the position of sensor head.
Simultaneously, in the time of in moving-member arrives the detection stroke range, the LED that is installed to sensor head is lighted by the signal processing circuit that is included in the sensor head.
For example, in including by fluid the cylinder barrel of pistons reciprocating linearly, comprise the sensor head of magnetic sensor is attached to whether the piston (piston with magnet) with testing equipment magnet arrives reciprocating terminal position or reciprocating centre position on the cylinder barrel.The position of piston of equipment magnet can not be by confirming from outside direct viewing.Therefore, for sensor head is adhered to the operator of the optional position in the groove attached to be formed at sensor in the cylinder barrel along the piston moving direction, following procedure is adopted routinely.
At first, in order to set the position of piston that will detect by magnetic sensor, set the outstanding length of the piston rod that begins from cylinder barrel.Had under the situation of setting outstanding length at piston rod, the sensor that sensor head is inserted into cylinder barrel adheres to groove, and adheres to groove by manually-operated along sensor and move.When sensor head during, be presented on the display unit of controller with numeral about the positional information of magnet with respect to sensor head near the magnet of piston.Therefore, according to the positional information that is presented on the display unit, the position that sensor head will adhere to is determined.In case determined the position adhered to, then tighten the trip bolt that is installed on sensor head, thereby sensor head be fixed on the precalculated position.
The detection stroke of magnetic sensor for example is set to, approximately 5mm.The operator can recognize that magnet is positioned at the detection stroke range with respect to magnetic sensor by the luminous of LED that is installed in sensor head.Yet, which position of detecting in the stroke range can not be determined by the luminous of the LED that is installed in sensor head as the adhering to of sensor head/fixed position, but is needed to observe the positional information of the digital display unit of controller.
For this reason, in order to seek the best attachment position of sensor head with respect to cylinder barrel, visually observe when being presented at positional information on the digital display unit of controller, determine which position of magnetic sensor in detecting stroke range come sensing magnetic force with numeral.For example, if the display unit detection stroke range of percentages show magnetic sensor, if and the position of indication about 50% on display is set to the optimum position, then sensor head adheres to groove along sensor and moves, and indicates about 50% position by the value that trip bolt is fixed on display unit.
Therefore, visually observe controller demonstration or when output the setting sensor head attachment position.Therefore, in order by trip bolt sensor head to be fixed on the optimum position, controller need be installed near the operator.Yet when the hydraulic cylinder of the production line that is installed to industrial products was attached to complicated and large-scale production equipment, hydraulic cylinder was placed on the place away from controller usually.For this reason, in order to seek the best attachment position of sensor head with respect to hydraulic cylinder, and at the display unit of observing controller near the vision ground, position of hydraulic cylinder, controller need be removed from original attachment position, extend electric wire afterwards so that controller is positioned at the attachment position place of hydraulic cylinder.This operation is trouble and difficulty.
Also have a kind of method, the display unit of controller is observed on one of them operator's vision ground; Another operator regulates the also position of movable sensor head; And carry out the best attachment position that sensor head is sought in speech communication between two operators.Yet this operation also is trouble and difficulty.
A target of the present invention is easily to carry out the attach operation of sensor head for actuator.
A kind of according to the location detecting apparatus of position that is used for having the moving-member of magnet of the present invention from the actuator body external detection, described moving-member with magnet is included in the actuator body movably, described location detecting apparatus comprises: sensor head, this sensor head is equipped with magnetic sensor and LED, the magnetic force of described magnetic sensor sensing magnet is with output signal output, and described LED is according to the position of moving-member and lighted; Controller, this controller is connected to sensor head based on controlling the luminous of LED from the output signal of magnetic sensor output and extinguishing via cable.
In location detecting apparatus according to the present invention, controller comprises: computing block, calculate the positional information of magnet based on described output signal; Luminous position is set piece, sets to be used to the luminous position that causes LED to be lighted; Display unit is used to show described positional information; And comparison block, be used for when indicating luminous position, luminous signal being outputed to LED from the positional information of computing block.In addition, in location detecting apparatus according to the present invention, luminous position is set piece and set the light emitting region that the primary importance that moved by moving-member and the second place limit on moving direction, and comparison block outputs to LED with luminous signal when indicating light emitting region from the positional information of computing block.
A kind of according to the location detecting apparatus of position that is used for having the moving-member of magnet of the present invention from the actuator body external detection, described moving-member with magnet is included in the actuator body movably, described location detecting apparatus comprises: sensor head, this sensor head is equipped with magnetic sensor and LED, the magnetic force of described magnetic sensor sensing magnet is with output signal output, and described LED is according to the position of moving-member and lighted; Controller, this controller is connected to sensor head based on from the luminous of the output signal control LED of magnetic sensor output with extinguish via cable, and wherein, described controller comprises: computing block, calculate the positional information of magnet based on described output signal; Luminous position is set piece, sets the light emitting region that the primary importance that moved on moving direction by moving-member and the second place limit; Display unit is used to show described positional information; And comparison block, be used for when indicating light emitting region, luminous signal being outputed to LED from the positional information of computing block.
A kind of according to controller of the present invention, this controller is connected to sensor head via cable, this sensor head is equipped with magnetic sensor and LED, described magnetic sensor is from the magnetic force of the magnet of the outside sensing moving-member of actuator body, described moving-member is included in the actuator body movably, described LED is according to the position of moving-member and lighted, and this controller outputs to the outside based on the output signal from magnetic sensor with control signal, this controller comprises: computing block, based on the positional information of calculating magnet from the output signal of magnetic sensor output; Luminous position is set piece, sets the luminous position that LED is lighted; Display unit is used to show described positional information; And comparison block, be used for when indicating luminous position, luminous signal being outputed to LED from the positional information of computing block.In controller according to the present invention, luminous position is set piece and set the light emitting region that the primary importance that moved by moving-member and the second place limit on moving direction, and comparison block outputs to LED with luminous signal when indicating light emitting region from the positional information of computing block.
In the present invention, the position that is included in moving-member in the actuator body, that have magnet is detected by the magnetic sensor that is installed in actuator body sensor external head, and is installed in the luminous of LED in the sensor head and extinguishes by controlling from the signal away from the controller of sensor head.Therefore, when sensor head was attached to actuator body, the operator can observe the best attachment position that the LED that is installed in the sensor head comes easily to determine sensor head by vision ground, thereby can easily carry out the attach operation of sensor head.
Description of drawings
Fig. 1 shows the skeleton view of the actuator that is mounted thereon according to location detecting apparatus of the present invention;
Fig. 2 is the sectional view that the 2-2 line in Fig. 1 obtains;
Fig. 3 is the skeleton view of the amplification of sensor head;
Fig. 4 A shows the synoptic diagram of example of the basic structure of magnetic sensor, and Fig. 4 B is the equivalent circuit diagram at the magnetic sensor shown in Fig. 4 A; And
Fig. 5 shows the block diagram of the control circuit in the controller shown in Fig. 1.
Embodiment
Below, will describe embodiments of the present invention in detail based on accompanying drawing.
The inside in cylinder hole 12 is divided into two 17a of pressure chamber and 17b by piston 15.Being formed in the cylinder barrel 11 is the inlet/escape hole 18a that is communicated with the 17a of pressure chamber, and the inlet that is communicated with the 17b of pressure chamber/escape hole 18b.When with pressurized air when inlet/escape hole 18a is fed to the 17a of pressure chamber, move on the left side of piston 15 in Fig. 2.When with pressurized air when inlet/escape hole 18b is fed to the 17b of pressure chamber, piston 15 moves in the opposite direction backward.
Piston 15 is equipped with magnet 19.Sensor adheres to groove 21 and is formed in the cylinder barrel 11, adheres to any one in the groove 21 at longitudinal extension thereby sensor head 20 is attached to sensor.Therefore as shown in fig. 1, all form two sensors in each outside surface in 4 outside surfaces of cylinder barrel 11 and adhere to groove 21,8 sensors adhere to groove 21 and are formed in the cylinder barrel 11 altogether.Sensor head 20 can be installed to a plurality of sensors and adhere in the groove 21 at least one.Each sensor adheres to groove 21 and all has opening portion 21a at cylinder barrel 11 outside openings and the holding portion 21b with the wide width of ratio open part 21a.
Fig. 3 is the enlarged perspective of sensor head 20.Sensor head 20 has housing 22, and this housing 22 is formed from a resin, and the shape of cross section of this housing 22 adheres to the shape of cross section of groove 21 corresponding to sensor.Because screw 23 is installed on the housing 22, adheres to groove 21 any lengthwise position places so sensor head 20 is fixed on sensor by screw 23.Comprise in the housing 22 into is magnetic sensor 24 and light emitting diode (being LED 25).As shown in fig. 1, sensor head 20 is connected to plug 27 via cable 26.
Plug 27 is detachably connected to the controller shell 31 of controller 30.What be detachably connected to controller shell 31 is plug 33, and power supply and signal output cable 32 are connected to plug 33.Controller shell 31 has base housing 34 and is attached to display unit housing 35 on the base housing 34.
Fig. 4 A shows the synoptic diagram of example of the basic structure of magnetic sensor 24; And Fig. 4 B is the equivalent circuit diagram at the magnetic sensor 24 shown in Fig. 4 A.
As shown in Fig. 4 A, magnetic sensor 24 has 8 magnetoresistive element 1-8 that are formed on the substrate.Each magnetoresistive element 1-8 extends mutually continuously, and parallel with substrate, adjacent magnetoresistive element 45 degree that tilt relative to each other.As shown in Fig. 4 B, 8 magnetoresistive element 1-8 form two groups of full-bridge circuits, so magnetic sensor 24 is the bridge types of enjoying a double blessing.By full-bridge circuit separately, magnetoresistive element bridge circuit A (24a) and magnetoresistive element bridge circuit B (24b) have been formed.
In the example shown in Fig. 1 and Fig. 2, sensor head 20 is attached to the axial substantially core of cylinder barrel 11.In the time of in as detection stroke " S " scope of piston 15 at magnetic sensor 24 of moving-member, the magnetic force of magnetic sensor 24 sensing magnet 19 and according to the position output signal output of magnet.Because magnetic sensor 24 is the bridge types of enjoying a double blessing, so each among two magnetoresistive element bridge circuit 24a and the 24b is all exported two output signals, described two output signals are with respect to the phase differential that axially have 90 degree of magnet 19.Therefore, based on output signal, can obtain magnet 19 by any calculating and arrive which position of detecting in the stroke S scope with phase differential from two magnetoresistive element bridge circuit 24a and 24b.
Fig. 5 shows the block diagram of the control circuit in sensor head shown in Figure 1 20 and the controller 30.Controller 30 has computing block 41, is input in the computing block 41 after being amplified by amplifier 36a and 36b from the output signal of two magnetoresistive element bridge circuit 24a and 24b.Computing block 41 is based on the location information signal that calculates magnet 19 from the output signal of two magnetoresistive element bridge circuit 24a of magnetic sensor 24 and 24b.This location information signal is output as voltage signal, this voltage signal magnet 19 arrive the end that detects stroke S scopes and after when the other end moves, change linearly.
In order to be presented at the magnet that detects in the stroke S scope position with respect to magnetic sensor 24 based on described location information signal, as shown in fig. 1, digital display unit 42 is installed on the front surface of display unit housing 35 of controller 30.Digital display unit 42 can show with the display format of any yardstick or ratio.For example, when arriving the other end, show 100 by numerical value 0 when magnet arrives an end of detection stroke S scope, then detect stroke S scope on average to be divided into 100 to show that " 0 " to the yardstick of the numerical value of " 100 " is shown if hypothesis shows.In this case, when detection stroke S scope is 5mm, show with 0.05mm yardstick at interval by digital display unit 42.And, when detecting stroke S scope, show with 0.01mm yardstick at interval by digital display unit 42 on average to be divided into 500 when being shown with the yardstick that shows 0 to 500 numerical value.The location information signal that obtains from computing block 41 carries out convergent-divergent by convergent-divergent piece 43 to be handled, and uses and set yardstick and be presented on the digital display unit 42.
When magnet 19 arrived the optional position of detecting in the stroke S scope, LED 25 controlled devices 30 of sensor head 20 were set luminous.For example, suppose to use numerical value " 0 " to " 500 " on digital display unit 42, to show the detection stroke S scope of 5mm, and suppose when magnet 19 moves to the centre position of detecting stroke S scope, just to light LED 25, then LED 25 is lighted when numerical value 250 is displayed on the digital display unit 42.Otherwise LED 25 is in the state that is extinguished.
If the scope of the position that comprises that LED 25 is lighted is provided, then when in regional between two positions that the piston 15 as moving-member is offset on its moving direction, LED 25 is lighted.For this reason, for example, if when piston 15 during in the centre position, LED 25 is lighted, and then the zone between two positions becomes light emitting region.If light emitting region is provided, then for example, when numerical value " 245 " to " 255 " was displayed on the digital display unit 42, LED 25 was lighted.In this case, in the scope of 0.1mm the time, LED 25 is lighted near moving-member falls within the centre position of sensing range S.
As shown in fig. 1, in order to make LED 25 when magnet 19 arrives in the predetermined light emitting region of sensing range S, be lighted, on the front surface of the display unit housing 35 of controller 30, upwarding key 44, down Arrow 45 and mode key 46 are provided.These keys 44-46 forms the light emitting region input block.In order to import the light emitting region that LED 25 is lighted, operator scheme key 46 selects the pattern of the higher limit of setting light emitting region from scope setting pattern.Under this state, when operation upwarding key 44 or down Arrow 45 makes higher limit (for example numerical value in above-mentioned example " 255 ") be shown on digital display unit 42 and then during operator scheme key 46, this higher limit is transfused to.Similarly, for example, when operator scheme key 46 under the condition that numerical value " 245 " is shown as the lower limit on the digital display unit 42 by operation upwarding key 44 or down Arrow 45, this lower limit is transfused to.Each value in these values of importing all is stored in the storer (not shown) in the controller 30.
When luminous signal when comparison block 48 sends to LED 25, also send to the LED of On/Off display unit 51 simultaneously.As shown in fig. 1, On/Off display unit 51 is installed between each key and digital display unit 42 among the key 44-46.As shown in fig. 1,4 sensor heads 20 are connected to plug 27, and controller 30 is equipped with 4 On/Off display units 51 corresponding to 4 sensor heads 20.In Fig. 1,4 On/Off display units 51 are represented by the reference character " a " to " d " corresponding to 4 sensor heads 20.Therefore, when On/Off display unit 51a when being lighted from the output signal of the magnetic sensor 24 of the sensor head shown in Fig. 1 20, that is, if the piston shown in Fig. 2 15 arrives in the predetermined light emitting region, then On/Off display unit 51a is lighted.Positional information corresponding to the piston 15 of sensor head 20 is presented on the digital display unit 42, and by described positional information, On/Off display unit 51a is lighted.
Location information signal from magnetic sensor 24 sends to such as external host or the such external control device of principal computer from convergent-divergent piece 43 via signal wire 52.Similarly, the On/Off output signal sends to described external control device via driver 53 from comparison block 48.For example, stop during in the precalculated position for pressurized air is fed to pneumatic cylinder so that when piston 15, drive signal sends to the solenoid valve controller (not shown) via signal wire 54 from driver 53 and is used for opening and closing air pressure stream path.
As mentioned above, controller 30 is connected to sensor head 20 by cable 26, and be arranged on position away from sensor head 20, thereby the digital display unit 42 that shows the positional information of piston 15 based on the output signal from magnetic sensor 24 shows on the controller 30 that is arranged on away from the position of sensor head 20.Therefore, when sensor head 20 is attached to cylinder barrel 11, take the mode of following routine: for sensor head 20 cylinder barrel 11 vertically on observe the attachment position that the numerical value that is presented on the digital display unit 42 comes setting sensor head 20 by vision ground during moving, need mobile controller 30 near cylinder barrel 11, perhaps when mobile controller 30 not, by carrying out attach operation in controller 30 sides with two operators of cylinder barrel side.This attach operation is difficult.
By contrast, in location detecting apparatus according to the present invention, when the relative position between magnetic sensor 24 and the magnet 19 falls into the light emitting region of importing by the operation of any key, because LED25 is according to coming the signal of self-controller 30 to be lighted, if the LED 25 of sensor head 20 visually is observed, then whether in position the operator can determine sensor head 20.For this reason, can easily carry out the attach operation of sensor head 20 to cylinder barrel 11.That is, for example, when magnetic sensor 24 detected piston 15 in predetermined intermediate position, piston rod 16 at first was set to the state that is projected into predetermined length.In this case, the operator vertically moves sensor head 20 along cylinder barrel 11, thereby makes magnetic sensor 24 move in the predetermined light emitting region with respect to the magnet 19 of piston 15.When sensor head 20 arrives in the light emitting region, LED 25 is according to coming the signal of self-controller 30 to be lighted, thereby sensor head 20 can easily be fixed on best attachment position, does not need to observe the numerical value of digital display unit 42 or carries out the cooperation operation with another operator who observes digital display unit 42.
For example, as mentioned above, if the light emitting region of having set LED 25 is so that LED 25 is lighted when being displayed on the digital display unit 42 in numerical value " 245 "-" 255 ", the LED 25 that then is installed in the sensor head 20 is lighted when sensor head 20 arrives in the light emitting regions.Therefore, the operator can only determine best attachment position by movable sensor head 20 and observation the luminous of LED 25 under the situation that does not need vision ground observation digital display unit 42, and sensor head 20 can be fixed on the optimum position.
Because light emitting region is provided as mentioned above, so when operator's movable sensor head 20, even sensor head 20 is slightly moved, still keep the light emitting region of LED 25 when movable sensor head 20.Therefore, the attach operation of sensor head 20 is convenient.That is, as mentioned above, when light emitting region is shown by numerical value 0-500, if luminous position is set at a point, and if the displacement of 0.01mm takes place during the moving of sensor head 20, then from luminescent conversion to extinguishing.Yet for example, if light emitting region is set to " 245 "-" 255 ", luminous stroke range becomes 0.1mm, sets the optimum position thereby made things convenient for by movable sensor head 20.After setting best attachment position by this way, sensor head 20 is fixed to cylinder barrel 11 by tightening screw 23.
Have big stroke range if light emitting region is set to, then attachment position has some big errors.In order to eliminate these errors, light emitting region can be set to narrow scope, and perhaps luminous position can only be set in a point that shows with numeral rather than any scope is provided.Note, what replacement was set in luminous position a point showing with numeral is, not only be positioned at a set some place if preestablish the system of light emitting region, and be positioned at predetermined stroke scope around this point, for example, be positioned at the scope of the some 0.1mm on every side that sets, then be convenient to set the optimum position.
Therefore, for piston rod 16 under the situation of attached sensors 20, pressurized air is provided to cylinder barrel 11 from the outside.When piston 15 arrived the detection stroke S scope of magnetic sensors 23 near the centre position to cause magnet 19 from the position of stroke end, the magnetic force of the magnetic sensor 24 sensing magnet 19 of sensor head 20 was to output to output signal computing block 41.Based on the output signal from magnetic sensor 24, the positional information that indication magnet 19 is positioned at which position of detecting stroke S scope is presented on the digital display unit 42 with numeral.Simultaneously, location information signal outputs to the external control device via signal wire 52 as simulating signal.When the digital display unit of the digital display unit that is similar to controller 30 was installed to the external control device, positional information was displayed on the display unit of external control device.In addition, other drive unit can also be ordered about and control to position-based information.
Set in the light emitting regions or during at the luminous position place, light emitting region or position display are on digital display unit 42, and LED 25 is from extinguishing state exchange to luminance when magnet 19 arrives.When LED25 was luminous, any one LED was lighted among the LED of On/Off display unit 51, and the On/Off signal is output to the external control device by signal wire 54.Based on this On/Off output signal, control signal is sent to the fluid path conversion electromagnetic valve, for example, is used to stop pressurized air being fed to pneumatic cylinder.
In order to detect the centre position of piston 15, pneumatic cylinder shown in Figure 1 is equipped with sensor head 20.When piston 15 during, be used to detect forward extreme position and mean that in the installation of other sensor head 20 extreme position, on cylinder barrel 11 backward each sensor head is attached to other sensor adheres to groove 21 at extreme position forward with at extreme position backward.Therefore, when magnetic sensor detects piston 15 and has arrived the position of end of to-and-fro movement stroke range, be pulled at piston rod 16 to carry out to adhere under the state of extreme position forward and be used to detect the operation of another sensor head of extreme position forward, and be withdrawn at piston rod 16 to carry out to adhere under the state of extreme position backward and be used to detect the operation of the another sensor head of extreme position backward.
The present invention is not limited to above-described embodiment, and can make differently change in the scope that does not deviate from purport of the present invention.For example, the pneumatic cylinder as actuator has been shown in Fig. 1 and 2, sensor head 20 is installed to actuator, but actuator is not limited to pneumatic cylinder.The oil hydraulic cylinder of oil pressure as actuating medium can also be used by sensor head 20 is installed in the position of magnet, perhaps is installed to by blade or rack piston the reciprocating revolving actuator of its rotation axis is detected.
Industrial usability
Location detecting apparatus according to the present invention can be applicable to the reciprocating hydraulic cylinder of its piston rod.
Claims (6)
1. location detecting apparatus of position that is used for having the moving-member of magnet from the actuator body external detection, described moving-member with magnet is included in the described actuator body movably, and described location detecting apparatus comprises:
Sensor head, this sensor head is equipped with magnetic sensor and LED, and the magnetic force of the described magnet of described magnetic sensor sensing is with output signal output, and described LED is according to the position of described moving-member and lighted; And
Controller, this controller is connected to described sensor head to control the luminous of described LED based on the output signal of exporting from described magnetic sensor and to extinguish via cable.
2. location detecting apparatus according to claim 1, wherein, described controller comprises: computing block is used for calculating based on described output signal the positional information of described magnet; Luminous position is set piece, is used to set be used to the luminous position that causes described LED to be lighted; Display unit is used to show described positional information; And comparison block, be used for when indicating described luminous position, luminous signal being outputed to described LED from the positional information of described computing block.
3. location detecting apparatus according to claim 2, wherein, described luminous position is set piece and set the light emitting region that the primary importance and the second place limited that is moved by described moving-member on moving direction, and described comparison block outputs to described LED with described luminous signal when indicating described light emitting region from the positional information of described computing block.
4. location detecting apparatus of position that is used for having the moving-member of magnet from the actuator body external detection, described moving-member with magnet is included in the described actuator body movably, and described location detecting apparatus comprises:
Sensor head, this sensor head is equipped with magnetic sensor and LED, and the magnetic force of the described magnet of described magnetic sensor sensing is with output signal output, and described LED is according to the position of described moving-member and lighted; And
Controller, this controller is connected to described sensor head with based on controlling the luminous of described LED from the output signal of described magnetic sensor output and extinguish via cable,
Wherein, described controller comprises: computing block is used for calculating based on described output signal the positional information of described magnet; Luminous position is set piece, is used to set the light emitting region that the primary importance and the second place limited that is moved on moving direction by described moving-member; Display unit is used to show described positional information; And comparison block, be used for when indicating described light emitting region, luminous signal being outputed to described LED from the positional information of described computing block.
5. controller, this controller is connected to sensor head via cable, this sensor head is equipped with magnetic sensor and LED, described magnetic sensor is from the magnetic force of the magnet of the outside sensing moving-member of actuator body, described moving-member is included in the described actuator body movably, described LED is according to the position of described moving-member and lighted, and this controller outputs to the outside based on the output signal from described magnetic sensor with control signal, and this controller comprises:
Computing block is used for based on the positional information of calculating described magnet from the output signal of described magnetic sensor output;
Luminous position is set piece, is used to set the luminous position that described LED is lighted;
Display unit is used to show described positional information; And
Comparison block is used for when indicating described luminous position from the positional information of described computing block luminous signal being outputed to described LED.
6. controller according to claim 5, wherein said luminous position is set piece and set the light emitting region that the primary importance and the second place limited that is moved by described moving-member on moving direction, and described comparison block outputs to described LED with luminous signal when indicating described light emitting region from the positional information of described computing block.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008-213881 | 2008-08-22 | ||
| JP2008213881A JP5180737B2 (en) | 2008-08-22 | 2008-08-22 | Position detecting apparatus and controller used therefor |
| PCT/JP2009/061724 WO2010021203A1 (en) | 2008-08-22 | 2009-06-26 | Position detecting device and controller used for the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101836088A true CN101836088A (en) | 2010-09-15 |
Family
ID=41707082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200980100510A Pending CN101836088A (en) | 2008-08-22 | 2009-06-26 | Position detecting device and controller used for the same |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5180737B2 (en) |
| CN (1) | CN101836088A (en) |
| WO (1) | WO2010021203A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103299091A (en) * | 2010-12-21 | 2013-09-11 | Smc株式会社 | Position detection device for fluid pressure cylinder |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9909601B2 (en) * | 2010-11-16 | 2018-03-06 | Illinois Tool Works Inc. | Motor control |
| JP6546881B2 (en) * | 2016-06-02 | 2019-07-17 | 株式会社コガネイ | Position detection device and actuator |
| JP6546882B2 (en) * | 2016-06-02 | 2019-07-17 | 株式会社コガネイ | Position detection device and actuator |
| EP3450926B1 (en) | 2016-06-02 | 2022-02-23 | Koganei Corporation | Position detecting device and actuator |
| JP7144363B2 (en) | 2019-06-27 | 2022-09-29 | 株式会社クボタ | Soil sampling device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6256607A (en) * | 1985-09-02 | 1987-03-12 | Smc Corp | Positioning device for fixing position detector in fluid pressure cylinder |
| JPH07103707A (en) * | 1993-10-06 | 1995-04-18 | Mikurotetsuku:Kk | Position detector for actuator |
| JPH08334305A (en) * | 1995-06-07 | 1996-12-17 | Smc Corp | Position detecting instrument |
-
2008
- 2008-08-22 JP JP2008213881A patent/JP5180737B2/en active Active
-
2009
- 2009-06-26 WO PCT/JP2009/061724 patent/WO2010021203A1/en active Application Filing
- 2009-06-26 CN CN200980100510A patent/CN101836088A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103299091A (en) * | 2010-12-21 | 2013-09-11 | Smc株式会社 | Position detection device for fluid pressure cylinder |
| CN103299091B (en) * | 2010-12-21 | 2015-09-23 | Smc株式会社 | The position detecting device of oil hydraulic cylinder |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5180737B2 (en) | 2013-04-10 |
| WO2010021203A1 (en) | 2010-02-25 |
| JP2010048698A (en) | 2010-03-04 |
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Application publication date: 20100915 |