CN111637904B - Linear motion position detection device - Google Patents
Linear motion position detection device Download PDFInfo
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- CN111637904B CN111637904B CN202010323432.1A CN202010323432A CN111637904B CN 111637904 B CN111637904 B CN 111637904B CN 202010323432 A CN202010323432 A CN 202010323432A CN 111637904 B CN111637904 B CN 111637904B
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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
- G01D5/16—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 by varying resistance
- G01D5/165—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 by varying resistance by relative movement of a point of contact or actuation and a resistive track
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- 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
- G01B7/003—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring position, not involving coordinate determination
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
- G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
- G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values
- G01P15/12—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values by alteration of electrical resistance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
Abstract
The utility model provides a detection device for linear motion position belongs to the detection device field. The detection device includes: the resistor comprises a sealed cavity, the sealed cavity is used for containing resistance liquid, the resistor further comprises a first polar plate, a second polar plate and a mass block, the first polar plate, the second polar plate and the mass block are respectively located in the sealed cavity, the first polar plate and the second polar plate are respectively located on two opposite sides of the sealed cavity, the second polar plate is installed on the mass block, the mass block is arranged in the sealed cavity in a sliding mode relative to the first polar plate, and the controller is used for detecting the resistance of the resistor and determining the position of a linear moving object to be detected according to the resistance of the resistor.
Description
Technical Field
The present disclosure relates to a detection device, and more particularly to a detection device for detecting a linear motion position.
Background
Currently, for detecting the position of an unmanned rectilinear motion object, a special navigator is usually used to detect the position of the rectilinear motion object, for example, an inertial navigation System or a GPS (Global Positioning System) navigator is used to monitor the position of the rectilinear motion object in real time.
In the course of implementing the present disclosure, the inventors found that the prior art has at least the following problems: the special navigator is expensive, and the detection cost of the position of the linearly moving object is high.
Disclosure of Invention
The embodiment of the disclosure provides a detection device for a linear motion position, which can detect the position of a linear motion object. The technical scheme is as follows:
the present disclosure provides a detection apparatus of a linear motion position, the detection apparatus including: a resistor and a controller, wherein the controller is connected with the resistor,
the resistor comprises a sealed cavity for containing a resistance fluid,
the resistor further comprises a first polar plate, a second polar plate and a mass block respectively positioned in the sealed cavity, the first polar plate and the second polar plate are respectively positioned at two opposite sides of the sealed cavity, the second polar plate is installed on the mass block, the mass block is arranged in the sealed cavity in a sliding manner relative to the first polar plate,
the controller is used for detecting the resistance of the resistor and determining the position of the linear moving object to be detected according to the resistance of the resistor.
Optionally, the resistor further comprises: a spring is arranged on the upper surface of the shell,
the spring is located between the first polar plate and the second polar plate.
Optionally, a gap for the resistance liquid to flow through exists between the mass block and the inner wall of the sealed cavity.
Optionally, the gap is located between a top of the sealed cavity and a top of the mass,
the mass block is provided with a damping hole for the resistance liquid to pass through, and the gap and the damping hole are respectively positioned at two opposite sides of the mass block.
Optionally, the controller is configured to apply a voltage to the resistor, detect a current between the first plate and the second plate, and calculate a resistance of the resistor based on the applied voltage and the current between the first plate and the second plate.
Optionally, the resistor further comprises: a first terminal and a second terminal, wherein the first terminal is connected with the first terminal,
the first terminal is electrically connected with the first pole plate, the second terminal is electrically connected with the second pole plate,
the controller is electrically connected with the first binding post and the second binding post respectively, and the controller is used for applying voltage to the resistor through the first binding post and the second binding post.
Optionally, the detection device further comprises a current sensor,
the current sensor is arranged on a lead connecting the first binding post and the controller, and is used for detecting the current between the first polar plate and the second polar plate and sending the detected current to the controller.
Optionally, the controller is configured to determine an acceleration corresponding to the resistance of the resistor according to a corresponding relationship between the resistance of the resistor and the acceleration; determining the speed of the linearly moving object to be detected according to the determined acceleration; and determining the position of the linear moving object to be detected according to the speed and the movement time of the linear moving object to be detected.
Optionally, the detection apparatus further comprises: a transmitting module for transmitting the data to the receiving module,
and the transmitting module is used for receiving the position information sent by the controller and sending the position information out.
Optionally, the detection apparatus further comprises: the resistor and the controller are respectively arranged in the shell, and the shell is used for being installed on the linearly moving object to be detected.
The technical scheme provided by the embodiment of the disclosure has the following beneficial effects:
the detection device for the position through the linear motion comprises a resistor and a controller, wherein the resistor comprises a sealed cavity for containing resistance liquid, the resistor further comprises a first polar plate, a second polar plate and a mass block which are respectively positioned in the sealed cavity, the first polar plate and the second polar plate are respectively positioned on two opposite sides of the sealed cavity, the second polar plate is installed on the mass block, and the mass block is arranged in the sealed cavity in a sliding mode relative to the first polar plate; when the detection device is arranged on the linearly moving object to be detected and moves linearly along with the linearly moving object to be detected, the acceleration of the mass block is the same as the acceleration of the linearly moving object to be detected, the mass block slides relative to the first polar plate under the action of the acceleration, at the moment, the distance between the first polar plate and the second polar plate is changed, and the resistance of the resistor (the resistance between the first polar plate and the second polar plate) is changed along with the change of the acceleration, so that the resistance of the resistor can represent the acceleration of the linearly moving object to be detected; the controller can obtain the acceleration of the linearly moving object to be detected after detecting the resistance of the resistor, further determine the speed of the linearly moving object to be detected according to the acceleration of the linearly moving object to be detected, and determine the current position of the linearly moving object to be detected according to the speed of the linearly moving object to be detected; the detection device has the advantages of simple structure, low cost of each component, low total cost of the detection device and detection expenditure saving.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a device for detecting a linear motion position according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a resistor provided by an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a device for detecting a linear motion position according to an embodiment of the present disclosure.
In the drawings, the reference numbers of the various parts are as follows:
1 resistor, 11 sealed cavities, 12 resistance liquid, 13 first polar plates, 14 second polar plates, 15 mass blocks, 16 damping holes, 17 springs, G gaps, 18 first terminals, 19 second terminals,
2 a controller,
3 a transmitting module,
4 casing, 41 base, 42 bolt hole, 43 cover plate,
5a charging interface,
6 a switch,
A, detecting the linearly moving object.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
To facilitate understanding of the technical solution of the detecting device for detecting a linear motion position provided in this embodiment, an application object of the detecting device will be described first.
The application object of the detection device is a rectilinear motion object. The linearly moving object may be an object that moves linearly. For example, an object that moves linearly in the horizontal direction.
For example, the linearly moving object may be a simulated impact object, and the position of the impacted object during the linear motion needs to be detected in real time due to the need to detect the deceleration performance of the impacted object.
Fig. 1 is a schematic structural diagram of a device for detecting a linear motion position according to an embodiment of the present disclosure, and referring to fig. 1, the device includes: a resistor 1 and a controller 2.
Fig. 2 is a schematic structural diagram of a resistor provided by an embodiment of the present disclosure, and referring to fig. 1 and 2, the resistor 1 includes a sealed cavity 11, and the sealed cavity 11 is used for containing a resistance liquid 12.
The resistor 1 further comprises a first plate 13, a second plate 14 and a mass 15, respectively, located inside the capsule 11, the first plate 13 and the second plate 14 being located on opposite sides of the capsule 11, respectively, the second plate 14 being mounted on the mass 15, the mass 15 being arranged in the capsule 11 in a slidable manner with respect to the first plate 13.
The controller 2 is used for detecting the resistance of the resistor 1 and determining the position of the linearly moving object to be detected according to the resistance of the resistor 1.
The resistance of the resistor 1 is the resistance between the first plate 13 and the second plate 14.
In the embodiment of the present disclosure, the detection device through the linear motion position comprises a resistor 1 and a controller 2, the resistor 1 comprises a sealed cavity 11 for containing a resistance liquid 12, the resistor 1 further comprises a first plate 13, a second plate 14 and a mass 15 which are respectively positioned in the sealed cavity 11, the first plate 13 and the second plate 14 are respectively positioned at two opposite sides of the sealed cavity 11, the second plate 14 is mounted on the mass 15, and the mass 15 is arranged in the sealed cavity 11 in a manner of sliding relative to the first plate 13; when the detection device is mounted on the linearly moving object to be detected and moves linearly along with the linearly moving object to be detected, the acceleration of the mass block 15 is the same as the acceleration of the linearly moving object to be detected, and under the action of the acceleration, the mass block 15 slides relative to the first polar plate 13, at this time, the distance between the first polar plate 13 and the second polar plate 14 is changed, and the resistance of the resistor 1 (the resistance between the first polar plate 13 and the second polar plate 14) is changed accordingly, so that the resistance of the resistor 1 can represent the acceleration of the linearly moving object to be detected; the controller 2 can obtain the acceleration of the linear moving object to be detected after detecting the resistance of the resistor 1, further determine the speed of the linear moving object to be detected according to the acceleration of the linear moving object to be detected, and determine the current position of the linear moving object to be detected according to the speed of the linear moving object to be detected; the detection device has the advantages of simple structure, low cost of each component, low total cost of the detection device and detection expenditure saving.
In addition, the detection device has the advantages of simple structure, easiness in realization, high reliability and large-scale industrial application.
The manner of sliding the mass 15 with respect to the first plate 13 includes: the masses 15 slide towards each other facing the first plate 13, or the masses 15 slide away from each other facing the first plate 13.
When the mass 15 slides towards the first plate 13, the distance between the mass 15 and the first plate 13 becomes smaller, the distance between the second plate 14 and the first plate 13 becomes shorter, and accordingly, the volume of the resistance liquid 12 between the second plate 14 and the first plate 13 becomes smaller, and the resistance between the second plate 14 and the first plate 13 becomes smaller.
When the mass 15 slides back to back towards the first plate 13, the distance between the mass 15 and the first plate 13 increases, the distance between the second plate 14 and the first plate 13 increases, and accordingly, the volume of the resistance liquid 12 between the second plate 14 and the first plate 13 increases, and the resistance between the second plate 14 and the first plate 13 increases.
The resistor 1 is a variable resistance resistor 1, and the working principle of the resistor is the electrolyte aqueous solution conduction principle. The first plate 13 and the second plate 14 respectively serve as electrodes of the resistor 1, and the resistor 1 changes the resistance value between the first plate 13 and the second plate 14 by changing the distance between the two electrodes in the electrolyte aqueous solution.
The components of the resistor 1 will be described in detail below.
The resistance liquid 12 is an electrolyte aqueous solution and is used for electric conduction.
Alternatively, the resistive liquid 12 may contain sodium bicarbonate.
Illustratively, the resistive fluid 12 is made from electrolytic powder.
The purpose of the sealed cavity 11 is to contain the resistance liquid 12 and limit the relative sliding of the second plate 14 (mass 15) and the first plate 13.
Alternatively, the sealed chamber 11 may be a rectangular parallelepiped structure.
Accordingly, the first pole plate 13 is disposed at one end in the longitudinal direction of the sealed chamber 11, and the second pole plate 14 (mass 15) can slide reciprocally between both ends in the longitudinal direction of the sealed chamber 11.
Alternatively, the sealed chamber 11 may be made of an insulating material.
For example, the sealed chamber 11 may be made of an insulating material such as polypropylene.
Wherein the first plate 13 and the second plate 14 are intended to serve as two electrodes of the resistor 1.
Optionally, the first polar plate 13 and the second polar plate 14 are both square plates.
Optionally, the first electrode plate 13 and the second electrode plate 14 are both made of conductive metal.
For example, the first plate 13 and the second plate 14 may be made of a conductive metal material such as copper or aluminum.
The purpose of the mass block 15 is to sense the acceleration of the linearly moving object to be detected, and to change the distance between the first polar plate 13 and the second polar plate 14 based on the sensed acceleration of the linearly moving object to be detected.
When the first polar plate 13 and the second polar plate 14 are square plates, the mass 15 may be a direction block, and the height of the mass 15 is higher than that of the second polar plate 14.
When the second pole plate 14 is installed, the second pole plate 14 can be attached to the mass block 15, the second pole plate 14 is arranged in the middle of the mass block 15, the second pole plate 14 is located between the first pole plate 13 and the mass block 15, and the first pole plate 13 is opposite to and parallel to the second pole plate 14.
Alternatively, the second plate 14 may be welded to the mass 15.
Alternatively, the material of the mass 15 may be an insulating material.
For example, the mass 15 may be made of an insulating material such as a phenolic resin.
Alternatively, the mass 15 has a certain mass, and the mass of the mass 15 may be determined by the elastic coefficient of the spring 17 and the acceleration range of the detected object.
When the mass 15 drives the second plate 14 to slide, the resistance liquid 12 in the sealed cavity 11 will flow from one side of the mass 15 to the other side. Based on this, a gap G for the resistance liquid 12 to flow through is exemplarily present between the mass 15 and the inner wall of the sealed cavity 11.
The present embodiment does not limit the position of the gap G, alternatively, the bottom of the mass 15 is in slidable contact with the inner wall of the sealed cavity 11, the gap G between the bottom of the mass 15 and the inner wall of the sealed cavity 11 is smaller, a smaller gap G also exists between the side wall of the mass 15 and the inner wall of the sealed cavity 11, respectively, and a larger gap G exists between the top of the mass 15 and the inner wall of the sealed cavity 11. Thus, the resistance liquid 12 flows from one side of the mass 15 to the other side through the gap G between the mass 15 and the inner wall of the sealed chamber 11.
Optionally, the gap G is located between the top of the sealed cavity 11 and the top of the mass 15.
Correspondingly, the mass block 15 is provided with a damping hole 16 for the resistance liquid 12 to pass through the mass block 15, and the gap G and the damping hole 16 are respectively positioned at two opposite sides of the mass block 15.
Specifically, the orifice 16 is located at one end of the mass 15 near the bottom.
Thus, the resistance liquid 12 flows from one side of the mass 15 to the other side through the damping holes 16 of the mass 15 and the gap G between the mass 15 and the inner wall of the sealed chamber 11.
The mass block 15 is provided with a damping hole 16 for providing damping for the mass block 15 when the mass block 15 rapidly slides due to large-range fluctuation of acceleration in a short time, so that the sliding speed of the mass block 15 is buffered, the resistance value is smoothed, the rapid change of the resistance value is avoided, and the detection error is reduced.
Optionally, each corner of the mass 15 is rounded.
In particular, the mass 15 is a square block, all the edges of which are chamfered by a small fillet.
The design of rounding off can reduce the resistance between the inner wall of sealed chamber 11 when quality piece 15 removes, avoids the scotch.
Exemplarily, the resistor 1 further comprises: and the spring 17 is positioned between the first polar plate 13 and the second polar plate 14.
As shown in fig. 1, the second pole plate 14 and the mass 15 are located in the middle of the sealed chamber 11 when the spring 17 is normal. When the mass block 15 slides towards the first polar plate 13 in the opposite direction and is closer to the first polar plate 13, the spring 17 is in a compressed state, at this time, because the spring 17 is positioned between the second polar plate 14 and the first polar plate 13, the first polar plate 13 and the second polar plate 14 cannot collide, meanwhile, the spring 17 provides a certain restoring force for the mass block 15, the mass block 15 is prevented from sliding rapidly, the sliding speed of the mass block 15 is buffered, the resistance value is changed smoothly, the resistance value is prevented from changing rapidly, and the detection error is reduced; on the contrary, when the mass block 15 slides back to back towards the first pole plate 13 and is farther away from the first pole plate 13, the spring 17 is in a stretching state, at this time, the spring 17 provides a certain pulling force for the mass block 15, so that the mass block 15 does not collide with the inner wall of the sealed cavity 11, and meanwhile, the quick sliding of the mass block 15 can be avoided by the pulling force of the spring 17, the sliding speed of the mass block 15 is buffered, the smooth resistance value changes, the rapid change of the resistance value is avoided, and the detection error is reduced.
Illustratively, the controller 2 is electrically connected with the first plate 13 and the second plate 14 of the resistor 1.
The controller 2 is configured to apply a voltage between the first plate 13 and the second plate 14 of the resistor 1, detect a current between the first plate 13 and the second plate 14, and calculate the resistance of the resistor 1 based on the applied voltage and the current between the first plate 13 and the second plate 14.
Illustratively, the resistor 1 further includes: a first terminal 18 and a second terminal 19.
The first terminal 18 is electrically connected to the first plate 13, and the second terminal 19 is electrically connected to the second plate 14.
The controller 2 is electrically connected to the first terminal 18 and the second terminal 19, respectively, and the controller 2 is configured to apply a voltage to the resistor 1 through the first terminal 18 and the second terminal 19.
Specifically, the first terminal 18 is electrically connected to the first pole plate 13 through a wire, the second terminal 19 is electrically connected to the second pole plate 14 through a wire, and the controller 2 is electrically connected to the first terminal 18 and the second terminal 19 through wires. After the voltage is applied, the first plate 13, the second plate 14, and the resistive liquid 12 between the two plates form a circuit.
Optionally, the first terminal post 18 and the second terminal post 19 are inserted into the sealed cavity 11.
Illustratively, the first post 18 and the second post 19 may be made of copper.
Illustratively, the detection device further comprises a current sensor.
The current sensor may be mounted on a wire connecting first terminal 18 with controller 2.
The current sensor is configured to detect a current between the first plate 13 and the second plate 14 and transmit the detected current to the controller 2.
Alternatively, the current sensor may be a Hall type current sensor, for example, a current sensor model SCK15-15A.
Illustratively, the controller 2 is configured to determine an acceleration corresponding to the resistance of the resistor 1 according to a preset corresponding relationship between the resistance of the resistor 1 and the acceleration; determining the speed of the linearly moving object to be detected according to the determined acceleration; and determining the position of the linearly moving object to be detected according to the speed and the motion time of the linearly moving object to be detected.
It is expected that the correspondence between the resistance value and the acceleration is obtained through experiments and stored in the controller 2.
After the speed and the movement time of the linear moving object to be detected are obtained, the movement distance of the linear moving object to be detected in the current period can be calculated; and then, the end point position of the linear moving object to be detected in the current period can be obtained by adding the end point position of the linear moving object to be detected in the previous period and the moving distance in the current period.
It should be noted that, because the linearly moving object to be detected is in a linear motion, the motion trail thereof is a straight line, and the motion direction thereof is not changed except for forward and backward in the motion process, the change of the motion direction thereof is not considered by the detection device.
Wherein the controller 2 comprises a memory and a processor, wherein the memory has stored therein a computer program being executable on the processor. The processor is configured to carry out the use of the controller 2 as described above when executing the computer program. The memory may be a read-only memory, a magnetic or optical disk, or the like.
Alternatively, the controller 2 may be a 16-bit-chip-AVR 16-based controller.
Exemplarily, the detection apparatus further comprises: and a transmitting module 3.
And the transmitting module 3 is used for receiving the position information sent by the controller 2 and sending the position information out.
The position information comprises the speed and the position of the linearly moving object to be detected.
Alternatively, the transmitting module 3 may be an antenna, and the controller 2 transmits the position information to the target receiving device through the antenna. Specifically, the controller 2 and the target reception device may connect and communicate through Wi-Fi (wireless internet access).
Exemplarily, the detection apparatus further comprises: a housing 4.
The resistor 1 and the controller 2 are respectively arranged in a shell 4, and the shell 4 is used for being mounted on a linearly moving object to be detected.
The purpose of the shell 4 is to protect the resistor 1 and the controller 2, and provide an external interface of the detection device, so that the detection device can be conveniently installed on a linear moving object to be detected.
Optionally, a base 41 is arranged on the housing 4, and a bolt hole 42 is arranged on the base 41, through which bolt hole 42 the detection device can be detachably connected with the linearly moving object to be detected.
Optionally, an indication of the direction of movement of the mass 15 is arranged on the housing 4.
The purpose of the mark is to ensure that the moving direction of the mass block 15 is the same as the moving direction of the linearly moving object to be detected, that is, the stretching direction of the spring 17 is the same as the moving direction of the linearly moving object to be detected, when the detection device is mounted on the linearly moving object to be detected, as shown in fig. 3.
Alternatively, the indication may be a tick mark.
Alternatively, the housing 4 is a square housing, and the base 41 thereof is disposed at the bottom of the housing 4.
Optionally, the top panel of the housing 4 is a detachable cover plate 43, for example, bolted to the housing 4, which facilitates maintenance of the resistor 1 and the controller 2.
Optionally, the detection apparatus further comprises: a power source.
The power supply is electrically connected to the controller 2 for supplying power to the controller 2.
Optionally, the power source is a rechargeable battery.
Correspondingly, the detection device further comprises: and a charging interface 5.
The charging interface 5 is used for communicating an external power supply with a power supply of the detection device so as to charge the power supply of the detection device.
Optionally, the detection apparatus further comprises: and a switch 6.
A switch 6 is arranged on the housing 4, the switch 6 being electrically connected to the controller 2, the switch 6 being used to activate or deactivate the controller 2.
Fig. 3 is a schematic structural diagram of a device for detecting a linear motion position according to an embodiment of the present disclosure, and the operation of the device will be briefly described below with reference to fig. 1 and 3.
The detection device is firstly installed on the linear moving object A to be detected, and the moving direction of the mass block 15 is ensured to be the same as the moving direction of the linear moving object A to be detected according to the identification. The switch 6 is then opened and the detection means is activated. At this time, the controller 2 provides a stable voltage to the resistor 1 through the two terminals and detects the current flowing through the resistor 1, thereby calculating the resistance of the resistor 1 in real time.
In fig. 1, the position of the mass block 15 is the initial position of the linear moving object a to be detected, at this time, the linear moving object a to be detected does not start linear motion, the acceleration is zero, the speed is zero, the spring 17 is normal, and the resistance of the resistor 1 is a fixed value.
When the linearly moving object a to be detected drives the detecting device to perform an accelerating motion or a decelerating motion in the opposite direction shown in fig. 3, the mass block 15 slides toward the first pole plate 13, the resistance liquid 12 flows from one side of the mass block 15 to the other side through the damping hole 16 of the mass block 15 and the gap G between the mass block 15 and the inner wall of the sealed cavity 11, the spring 17 is in a compressed state (see fig. 3), the distance between the first pole plate 13 and the second pole plate 14 becomes smaller, and the resistance value of the resistor 1 becomes smaller.
When the linear moving object a to be detected drives the detecting device to perform deceleration motion or reverse acceleration motion along the direction shown in fig. 3, the mass block 15 slides away from the first polar plate 13, the spring 17 is in a stretched state, the distance between the first polar plate 13 and the second polar plate 14 is increased, and the resistance value of the resistor 1 is increased.
Therefore, the real-time acceleration of the linearly moving object A to be detected can be obtained by detecting the resistance value of the resistor in real time, then the integral operation is carried out, the speed information can be obtained, the moving distance of the current period can be obtained by calculation according to the time of each period, then the terminal position of the current period can be obtained by adding the initial position (namely the terminal position of the previous period) of the current period to the moving distance of the current period, so that the current position information of the linearly moving object to be detected can be obtained, and the overall linear motion track of the linearly moving object A to be detected can be drawn after the initial position and the terminal position of each period of the linearly moving object A to be detected are obtained.
The above description is intended to be exemplary only and not to limit the present disclosure, and any modification, equivalent replacement, or improvement made without departing from the spirit and scope of the present disclosure is to be considered as the same as the present disclosure.
Claims (7)
1. A device for detecting a position of linear motion, the device comprising: a resistor (1), a controller (2) and a shell (4),
the resistor (1) comprises a sealed cavity (11), the sealed cavity (11) is used for containing resistance liquid (12),
the resistor (1) further comprises a first polar plate (13), a second polar plate (14) and a mass block (15) which are respectively located in the sealed cavity (11), the first polar plate (13) and the second polar plate (14) are respectively located on two opposite sides of the sealed cavity (11), the second polar plate (14) is installed on the mass block (15), the mass block (15) is arranged in the sealed cavity (11) in a sliding mode relative to the first polar plate (13), a gap (G) for flowing of the resistance liquid (12) is formed between the mass block (15) and the inner wall of the sealed cavity (11), the mass block (15) is used for sensing the acceleration of the linearly moving object to be detected, and the distance between the first polar plate (13) and the second polar plate (14) is changed based on the sensed acceleration of the linearly moving object to be detected;
the controller (2) is used for detecting the resistance of the resistor (1), and determining the acceleration corresponding to the resistance of the resistor (1) according to the corresponding relation between the resistance of the resistor (1) and the acceleration; determining the speed of the linearly moving object to be detected according to the determined acceleration; determining the position of the linear moving object to be detected according to the speed and the movement time of the linear moving object to be detected, wherein the resistance of the resistor (1) is the resistance between the first polar plate (13) and the second polar plate (14);
the resistor (1) and the controller (2) are respectively arranged in the shell (4), and the shell (4) is used for being mounted on the linearly moving object to be detected.
2. The detection device according to claim 1, wherein the resistor (1) further comprises: a spring (17) is arranged on the upper surface of the shell,
the spring (17) is located between the first pole plate (13) and the second pole plate (14).
3. Detection device according to claim 1, characterized in that said gap (G) is located between the top of said sealed cavity (11) and the top of said mass (15),
the mass block (15) is provided with a damping hole (16) for the resistance liquid (12) to pass through the mass block (15), and the gap (G) and the damping hole (16) are respectively positioned at two opposite sides of the mass block (15).
4. The detection device according to claim 1, wherein the controller (2) is configured to apply a voltage to the resistor (1) and to detect a current between the first plate (13) and the second plate (14), and to calculate the resistance of the resistor (1) based on the applied voltage and the current between the first plate (13) and the second plate (14).
5. The detection device according to claim 4, characterized in that the resistor (1) further comprises: a first terminal (18) and a second terminal (19),
the first terminal (18) is electrically connected to the first pole plate (13), the second terminal (19) is electrically connected to the second pole plate (14),
the controller (2) is electrically connected with the first terminal (18) and the second terminal (19), respectively, and the controller (2) is used for applying voltage to the resistor (1) through the first terminal (18) and the second terminal (19).
6. The detection device of claim 5, further comprising a current sensor,
the current sensor is mounted on a wire connecting the first terminal (18) and the controller (2), and is configured to detect a current between the first pole plate (13) and the second pole plate (14) and send the detected current to the controller (2).
7. The detection device according to claim 1, further comprising: a transmitting module (3) for transmitting a signal,
and the transmitting module (3) is used for receiving the position information sent by the controller (2) and sending the position information out.
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