CN110109008B - Proximity switch induction range testing device and method - Google Patents
Proximity switch induction range testing device and method Download PDFInfo
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- CN110109008B CN110109008B CN201910316255.1A CN201910316255A CN110109008B CN 110109008 B CN110109008 B CN 110109008B CN 201910316255 A CN201910316255 A CN 201910316255A CN 110109008 B CN110109008 B CN 110109008B
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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
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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Abstract
The invention discloses a proximity switch induction range testing system and a method thereof, wherein the testing system comprises a detecting body, a position adjusting unit and a position collecting unit; the position adjusting unit is used for driving a proximity switch to be detected to move and adjusting the distance between the proximity switch and the detection body in a first direction and a second direction perpendicular to the first direction; the first direction is the direction of the sensing surface of the proximity switch corresponding to the detection body; the position acquisition unit is connected with the proximity switch, and is used for setting a zero position of the proximity switch in the second direction and recording displacement data from the zero position when the proximity switch moves in the second direction in real time; the invention can realize the test of the transverse induction range of the proximity switch under different induction distances, and has the advantages of simple system structure, convenient operation and strong universality.
Description
Technical Field
The invention belongs to the technical field of switch testing, and particularly relates to a proximity switch induction range testing device and method.
Background
A proximity switch is a position switch that can be operated without mechanically directly contacting a moving part, and is also called a contactless proximity switch, and is an ideal electronic switching value sensor. When the metal detection body approaches to the induction area of the switch, the switch can rapidly send out an electric command without contact, pressure and spark, and accurately reflect the position and the stroke of the motion mechanism, even if the metal detection body is used for general stroke control, the positioning precision, the operation frequency, the service life, the convenience of installation and adjustment and the applicability to severe environment of the metal detection body are incomparable with those of a general mechanical stroke switch. It is widely used in the industries of aviation, aerospace technology, machine tool, metallurgy, chemical engineering, light spinning, printing and the like. The automatic control system can be used as the links of limiting, counting, positioning control, automatic protection and the like.
In the selective use of proximity switches, the sensing distance is one of the most important parameters of proximity switches. When an object moves to the proximity switch and approaches a certain distance, the displacement sensor senses the object and the switch acts, and the distance is usually called as a sensing distance or a detection distance; the sensing distances of different proximity switches are different. The transverse induction range of the proximity switch under different induction distances is rarely related or applied, but in some specific occasions, the transverse induction range of the proximity switch under different induction distances is required; there are few prior art devices or methods for detecting the lateral sensing range parameters of proximity switches.
Disclosure of Invention
In view of at least one of the defects or the improvement requirements of the prior art, the invention provides a proximity switch sensing range testing device and a proximity switch sensing range testing method, which can realize the test of the lateral sensing range of a proximity switch under different sensing distances.
To achieve the above object, according to one aspect of the present invention, there is provided a proximity switch sensing range testing system including a detecting body, a position adjusting unit, and a position collecting unit;
the position adjusting unit is used for driving a proximity switch to be detected to move and adjusting the distance between the proximity switch and the detection body in a first direction and a second direction perpendicular to the first direction; the first direction is the direction of the sensing surface of the proximity switch corresponding to the detection body;
the position acquisition unit is electrically connected with the proximity switch and used for setting a zero position of the proximity switch in the second direction and recording displacement data from the zero position when the proximity switch moves in the second direction in real time.
Preferably, the zero point position of the proximity switch sensing range testing system is located outside the sensing range of the proximity switch in the second direction.
Preferably, in the proximity switch sensing range testing system, the position adjusting unit comprises a fixing device, a moving platform, a distance fine-tuning device and a motor;
the fixing device is used for fixing the proximity switch to be tested on the mobile platform, and the mobile platform drives the proximity switch to move in a second direction under the control of the motor; the distance fine-tuning device is used for adjusting the distance between the moving platform and the detection body in the first direction.
Preferably, in the proximity switch sensing range testing system, a motor is electrically connected to the proximity switch, and the motor is used for controlling the mobile platform to automatically stop moving according to an electrical command output by the proximity switch when a level jump is generated in a sensing signal of the proximity switch.
Preferably, in the proximity switch sensing range testing system, the position acquisition unit is further configured to display displacement data of the proximity switch in a moving process in real time, and record current displacement data of the proximity switch according to an electrical instruction output by the proximity switch when the sensing signal of the proximity switch generates level jump.
Preferably, the proximity switch sensing range testing system further comprises an oscilloscope; the oscilloscope is electrically connected with the proximity switch and used for converting induction signals generated by the proximity switch in the moving process into waveform signals and displaying the waveform signals.
According to another aspect of the present invention, there is also provided a proximity switch sensing range testing method, including the steps of:
s1: adjusting the sensing distance between the proximity switch to be detected and the detection body in the first direction; the first direction is the direction of the sensing surface of the proximity switch corresponding to the detection body; the induction distance is smaller than the maximum induction distance of the proximity switch to be detected;
s2: moving a proximity switch in a second direction perpendicular to the first direction and setting a zero point position of the proximity switch in the second direction;
s3: will approach the switchThe proximity switch is controlled to move forwards in a second direction when the proximity switch is arranged outside the sensing range, and first displacement data X from the zero point position when the proximity switch senses a detection body is recordeda1(ii) a Continuously moving in the forward direction, and recording second displacement data X of the distance zero point position when the proximity switch can not sense the detection bodyb1；
S4: controlling the proximity switch to move reversely in the second direction, and recording third displacement data X of the distance zero point position when the proximity switch senses the detection bodyb2(ii) a Continuing to move reversely, recording fourth displacement data X of the distance zero point position when the proximity switch can not sense the detection bodya2；
S5: according to the first displacement data Xa1Second shift data Xb1The third displacement data Xb2And a fourth shift data Xa2And calculating the sensing range of the proximity switch when sensing the distance d.
Preferably, in the method for testing the sensing range of the proximity switch, when the zero point position is located outside the sensing range of the proximity switch in the second direction, the calculation formula of the sensing range is as follows:
preferably, in the method for testing the sensing range of the proximity switch, when the zero point position is located within the sensing range of the proximity switch in the second direction, the calculation formula of the sensing range is as follows:
in general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
the proximity switch induction range testing system and method provided by the invention adjust the distance between the proximity switch to be tested and the detecting body in a first direction and a second direction perpendicular to the first direction through the position adjusting unit; setting a zero point position of the proximity switch in a second direction through the position acquisition unit, and respectively recording displacement data of the distance zero point position when the proximity switch can sense and cannot sense the detection body when moving in the second direction in a two-way manner; according to the position data, the transverse induction range of the proximity switch under the current induction distance can be calculated; the position adjusting unit is used for adjusting the sensing distance between the proximity switch and the detection body in the first direction, so that the transverse sensing range of the proximity switch under different sensing distances can be tested; the system has simple structure, convenient operation and strong universality.
Drawings
Fig. 1 is a schematic structural diagram of a proximity switch sensing range testing system according to an embodiment of the present invention; wherein, 1-detecting the metal sheet; 2-a position adjustment device; 3-a proximity switch; 4-a data display panel; 5-a power supply; 6-an oscilloscope;
FIG. 2 is a flow chart of a proximity switch sensing range testing method according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a testing process of a proximity switch sensing range testing method according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Fig. 1 is a schematic structural diagram of a proximity switch sensing range testing system according to an embodiment of the present invention; as shown in fig. 1, the test system includes a detection metal sheet 1, a position adjusting device 2, a data display panel 4 and a 24V power supply 5;
the 24V power supply 5 is used for supplying power to the proximity switch 3 to be detected, the proximity switch 3 is fixed on the position adjusting device 2, the position adjusting device 2 drives the proximity switch 3 to be detected to move, and the distance between the proximity switch 3 and the detection metal sheet 1 in the Y direction and the X direction perpendicular to the Y direction is adjusted; wherein, the Y direction is the direction of the induction surface of the proximity switch 3 corresponding to the detection metal sheet 1; when the distance between the detection metal sheet 1 and the proximity switch 3 in the Y direction reaches a certain value, the proximity switch 3 can act, and the distance is called as the maximum induction distance of the proximity switch 3;
the data display panel 4 is electrically connected with the proximity switch 3 and is used for displaying displacement data of the proximity switch 3 in the moving process in real time, wherein the displacement data comprises displacement data in the Y direction and displacement data in the X direction; and is used for setting the zero point position of the proximity switch 3 in the X direction and recording the displacement data from the zero point position when the proximity switch 3 moves in the X direction in real time. Wherein, the zero point position can be set outside the sensing range of the proximity switch 3 in the X direction, that is, the proximity switch 3 cannot sense the detection metal sheet at the zero point position; it is also possible to set the sensing range of the proximity switch 3 in the X direction, and in order to record the displacement data of the proximity switch 3 during the movement, the zero point position is preferably set outside the sensing range of the proximity switch 3 in the X direction.
Further, the position adjusting device 2 comprises a fixing device, a moving platform, a distance fine-tuning device and a motor;
the fixing device is used for fixing the proximity switch to be tested on the mobile platform, and the mobile platform drives the proximity switch to move in the X direction under the control of the motor; the distance fine-tuning device is used for adjusting the distance between the moving platform and the detection metal sheet in the Y direction, so that the transverse (X direction) induction range of the proximity switch in different induction distances is tested.
The motor is electrically connected with the proximity switch and used for controlling the mobile platform to automatically stop moving according to an electric instruction output by the proximity switch when the level jump is generated by the induction signal of the proximity switch. When the proximity switch senses the detection metal sheet in the moving process or exceeds the sensing range and cannot sense the moment of the detection metal sheet, the level of a sensing signal changes suddenly, the proximity switch outputs an electrical instruction at the moment, and the motor controls the moving platform to automatically stop moving according to the electrical instruction; at the same time, the data display panel 4 records the current displacement data of the proximity switch according to the electrical instruction.
As a preferable feature of this embodiment, the proximity switch sensing range testing system further includes an oscilloscope 6 connected to the proximity switch; the oscilloscope 6 is used for converting induction signals generated by the proximity switch in the moving process into waveform signals and displaying the waveform signals, so that a tester can visually know the signal change of the proximity switch in the moving process.
The embodiment also provides a proximity switch induction range testing method, which is used for detecting the transverse induction ranges of the proximity switch under different induction distances; FIG. 2 is a flow chart of a proximity switch sensing range testing method according to an embodiment of the present invention; FIG. 3 is a schematic diagram of a testing process of a proximity switch sensing range testing method according to an embodiment of the present invention; as shown in fig. 2 and 3, the testing method comprises the following steps:
s1: adjusting the sensing distance d between the proximity switch to be detected and the detection metal sheet in the Y direction; the Y direction is the direction of the induction surface of the proximity switch corresponding to the detection metal sheet;
s2: moving a proximity switch in an X direction perpendicular to the Y direction and setting a zero point position of the proximity switch in the X direction; the present embodiment preferably sets the zero point position outside the sensing range of the proximity switch in the X direction;
s3: the proximity switch is arranged outside the induction range, the proximity switch is controlled to move in the positive direction in the X direction, and first displacement data X of the position of a distance zero point when the proximity switch induces and detects the metal sheet is recordeda1(ii) a Continuously moving in the forward direction, and recording second displacement data X at the position of the distance zero point when the proximity switch cannot sense the detection metal sheetb1；
S4: controlling the proximity switch to move reversely in the X direction, and recording third displacement data X of the distance zero point position when the proximity switch senses the detection metal sheetb2(ii) a Continuing to move reversely, recording fourth displacement data X at the position of the distance zero point when the proximity switch cannot sense the detection metal sheeta2；
S5: according to the first shift data Xa1Second shift data Xb1The third displacement data Xb2And a fourth shift data Xa2Calculating the sensing range of the proximity switch when sensing the distance d,the calculation formula is as follows:
of course, the zero point position in step S2 may also be set within the sensing range of the proximity switch in the X direction, and in this case, the calculation formula of the sensing range of the proximity switch at the sensing distance d is:
the following describes the flow of the above-mentioned testing method in further detail with reference to the proximity switch sensing range testing system provided in this embodiment, and the testing steps are as follows:
(1) and (3) mounting the proximity switch to be detected on the movable platform through a fixing device, and adjusting the position of the movable platform along the X direction to ensure that the surface of the proximity switch is just opposite to the tooth surface of the detection metal sheet.
(2) Adjusting the position of the moving platform along the Y direction to enable the induction surface of the proximity switch to be attached to the tooth surface of the detection metal sheet; pressing a Y0 key on a data display panel to clear Y-direction data;
(3) controlling the moving platform to move through the distance fine-tuning device, and adjusting the induction distance d between the moving platform and the detection metal sheet; the sensing distance d must be less than the maximum sensing distance of the proximity switch;
(4) pulling a motor control rod to enable the moving platform to move reversely along the X direction, observing the waveform of the oscilloscope, and automatically stopping moving when the waveform of an output signal of the proximity switch jumps from a low level to a high level; at the moment, the proximity switch cannot sense the detection metal sheet, and an indicator light of the proximity switch is turned off; continuing to move reversely along the X direction, and clearing the X-direction data on the data display panel at a certain position, namely setting the position as a zero position in the X direction;
(5) pulling a motor control rod to enable the moving platform to move forwards along the X direction, observing the waveform of the oscilloscope, when the output signal of the proximity switch jumps from a high level to a low level, automatically stopping the moving platform, sensing the detection sheet metal by the proximity switch just at the moment, and lighting an indicator light of the proximity switchRecording the position data X of the proximity switch in the X direction according to the display panela1(ii) a Then pulling the motor control rod to enable the moving platform to continue to move along the positive direction, and when the waveform of an output signal of the proximity switch jumps from a low level to a high level, the moving platform automatically stops moving; at the moment, the proximity switch cannot sense the detection metal sheet, the indicator light of the proximity switch is turned off, and the position data X of the proximity switch in the X direction at the moment is recordedb1；
(6) Pulling the motor control rod to enable the moving platform to continue to move forwards along the X direction, reversely pulling the motor control rod after moving out of the detection range for a certain distance to enable the moving platform to move backwards along the X direction, observing the waveform of the oscilloscope, automatically stopping the moving platform when the output signal of the proximity switch jumps from a high level to a low level, sensing the detection metal sheet by the proximity switch just at the moment, lighting an approaching indicator light, and recording the position data X of the proximity switch at the momentb2(ii) a Then pulling the motor control rod to enable the moving platform to continue to move reversely, when the output signal waveform of the proximity switch jumps from low level to high level, the moving platform automatically stops moving, the proximity switch cannot sense the detection metal sheet at the moment, an indicator lamp of the proximity switch is turned off, and position data X of the proximity switch at the moment is recordeda2；
(7) Calculating the induction range of the proximity switch when the induction distance is d according to the position data as follows:
(8) and (5) changing the induction distance to d, and repeating the steps (3) to (7) to obtain the transverse induction range of the proximity switch at different induction distances.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. A proximity switch induction range test system is characterized by comprising a detection body, a position adjusting unit and a position acquisition unit;
the position adjusting unit is used for driving a proximity switch to be detected to move and adjusting the distance between the proximity switch and the detection body in a first direction and a second direction perpendicular to the first direction; the first direction is the direction of the sensing surface of the proximity switch corresponding to the detection body; the position adjusting unit comprises a fixing device, a moving platform, a distance fine-tuning device and a motor;
the fixing device is used for fixing the proximity switch to be tested on the mobile platform, and the mobile platform drives the proximity switch to move in a second direction under the control of the motor; the distance fine-tuning device is used for adjusting the distance between the moving platform and the detection body in the first direction;
the position acquisition unit is connected with the proximity switch and used for setting a zero position of the proximity switch in the second direction and recording displacement data from the zero position when the proximity switch moves in the second direction in real time.
2. The proximity switch sensing range testing system of claim 1, wherein the zero position is outside of the sensing range of the proximity switch in the second direction.
3. The proximity switch sensing range testing system of claim 1, wherein the motor is electrically connected to the proximity switch, and the motor is configured to control the mobile platform to automatically stop moving according to an electrical command outputted by the proximity switch when a level transition occurs in a sensing signal of the proximity switch.
4. The proximity switch induction range test system of claim 1 or 3, wherein the position acquisition unit is further configured to display displacement data of the proximity switch during movement in real time, and record current displacement data of the proximity switch according to an electrical command output by the proximity switch when a level jump occurs in an induction signal of the proximity switch.
5. The proximity switch sensing range test system of claim 4, further comprising an oscilloscope; the oscilloscope is electrically connected with the proximity switch and used for converting induction signals generated by the proximity switch in the moving process into waveform signals and displaying the waveform signals.
6. A proximity switch induction range testing method is characterized by comprising the following steps:
s1: adjusting the sensing distance between the proximity switch to be detected and the detection body in the first direction; the first direction is the direction of the sensing surface of the proximity switch corresponding to the detection body;
s2: moving a proximity switch in a second direction perpendicular to the first direction and setting a zero point position of the proximity switch in the second direction;
s3: the proximity switch is arranged outside the induction range, the proximity switch is controlled to move in the forward direction in the second direction, and first displacement data X from the zero point position when the proximity switch induces the detection body is recordeda1(ii) a Continuously moving in the forward direction, and recording second displacement data X of the distance zero point position when the proximity switch can not sense the detection bodyb1；
S4: controlling the proximity switch to move reversely in the second direction, and recording third displacement data X of the distance zero point position when the proximity switch senses the detection bodyb2(ii) a Continuing to move reversely, recording fourth displacement data X of the distance zero point position when the proximity switch can not sense the detection bodya2；
S5: according to the first displacement data Xa1Second shift data Xb1The third displacement data Xb2And a fourth shift data Xa2Calculating the induction range of the proximity switch at the induction distance; specifically, the method comprises the following steps:
when the zero point position is located outside the induction range of the proximity switch in the second direction, the calculation formula of the induction range is as follows:
when said zero pointWhen the position is within the sensing range of the proximity switch in the second direction, the calculation formula of the sensing range is as follows:
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| CN111007444A (en) * | 2019-12-04 | 2020-04-14 | 萨康电子（上海）有限公司 | Distance measuring method of magnetic induction switch |
| CN110932621B (en) * | 2019-12-05 | 2021-08-27 | 杰克缝纫机股份有限公司 | Zero point detection method and device for stepping motor |
| CN110967058B (en) * | 2019-12-26 | 2021-11-09 | 滁州市技术监督检测中心 | Portable proximity switch sensor test equipment |
| CN113267720B (en) * | 2021-05-10 | 2023-03-14 | 恒银金融科技股份有限公司 | Door magnetic switch service life testing system and method for financial equipment |
| CN114034333B (en) * | 2021-11-23 | 2024-04-02 | 中国航空工业集团公司洛阳电光设备研究所 | Fault detection method for proximity sensor of two-position control mechanism |
| CN113917325B (en) * | 2021-12-16 | 2022-05-06 | 山东天大清源信息科技有限公司 | Proximity switch detection device and detection method thereof |
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