CN109343385B - Rotary type multi-point switch switching device, control system and control method - Google Patents
Rotary type multi-point switch switching device, control system and control method Download PDFInfo
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- CN109343385B CN109343385B CN201811138627.8A CN201811138627A CN109343385B CN 109343385 B CN109343385 B CN 109343385B CN 201811138627 A CN201811138627 A CN 201811138627A CN 109343385 B CN109343385 B CN 109343385B
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- 238000012360 testing method Methods 0.000 abstract description 17
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
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- G05B2219/25314—Modular structure, modules
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Abstract
Compared with a system with the same switch number, the size and the volume of the device provided by the invention are smaller than those of the prior scheme, so that the cost is reduced; the self-contained switch state feedback detection greatly improves the safety and reliability of automatic testing, the voltage resistance of a switch node is good, and a stepping motor is used as an execution unit, so that the design of a corresponding control system can be simplified.
Description
Technical Field
The invention relates to the technical field of automatic testing, in particular to a rotary type multi-point switch switching device, a control system and a control method.
Background
With the development of industrial automation, an automatic test system becomes an important means for product quality detection by virtue of the characteristics of high test speed, high test precision, simple operation and the like, and is widely applied to the field of industrial automation production. The switch circuit is used as an interface for realizing automatic test, and is mainly responsible for switching test excitation signals such as a power supply, a signal source and the like to any input port of a tested object through a switch matrix, and simultaneously automatically switching signals of an output port of the tested object to corresponding test instruments and meters. Therefore, the high-performance switch matrix becomes a key part for realizing the universality of the automatic test system.
The existing switch matrix circuit mostly adopts the implementation scheme of a control unit and a switch array, wherein the control unit consists of a microcontroller and a latch driving circuit, and the switch array mostly adopts a relay array. A large number of relays are adopted in the system, so that the whole switching control system has the characteristics of high cost, large volume, complex control circuit, long response time, high power consumption, short service life and the like. In addition, the method has poor universality and expansibility, and the relay array needs to be redeveloped and designed according to different test requirements.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and obtain a rotary type multi-point switch switching device, a control system and a control method which are simple in structure and strong in universality.
The invention is realized by the following technical scheme:
a rotary type multi-point switch switching device comprises a shell, wherein a driving device, a circuit board arranged above the driving device, an injection molding disc arranged above the circuit board, a main switch, an auxiliary switch and a controller are arranged in the shell, the driving end of the driving device is connected with two brush blocks, one side of the circuit board is electrically connected with the main switch, the other side of the main switch extends out of the shell, the other side of the circuit board is electrically connected with the auxiliary switch, the other side of the auxiliary switch is electrically connected to the controller, and a communication interface of the controller extends out of the shell; wherein the content of the first and second substances,
the circuit board is characterized in that an inner conducting ring concentric with an opening of the injection molding disc and an outer conducting ring sleeved on the outer ring of the inner conducting ring are arranged between the circuit board and the injection molding disc, a distance is arranged between the inner edge of the outer conducting ring and the outer edge of the inner conducting ring, main switch positive contacts are uniformly distributed on the circuit board along the outer edge of the inner conducting ring, auxiliary switch positive contacts are uniformly distributed on the circuit board along the outer edge of the outer conducting ring, one ends of the two brush blocks respectively correspond to the inner conducting ring and the outer conducting ring and are in contact with or not in contact with the corresponding contacts under the control of the driving device to realize the switching of lines, and the main switch and the corresponding auxiliary switches are.
The invention is further improved in that the housing comprises a closed accommodation space surrounded by a bottom plate, a cover plate, a left wall, a right wall, a front wall and a rear wall; the driving device is arranged on the bottom plate; the injection molding disc is of a plate-shaped structure with a hole in the center and is detachably arranged between the left wall and the right wall; the circuit board is detachably mounted on the lower surface of the injection molding disc and is matched with the injection molding disc in shape; the main switch is provided with a terminal and extends out of the front wall, and the other side of the main switch is electrically connected with the circuit board; the auxiliary switch is connected to the I/O interface of the controller, and the other side of the auxiliary switch is electrically connected with the circuit board; the controller is matched with the rear wall and is provided with a communication interface, and the communication interface extends out of the rear wall to the outside.
In a further improvement of the present invention, the lower portions of the left and right walls are recessed into the accommodation space to form step portions, respectively, and the injection tray and the circuit board are detachably mounted on the step portions.
The invention is further improved in that the rear wall comprises a frame body and a panel which is detachably connected with the frame body, the panel is provided with an opening matched with the communication interface, and the shape of the panel is matched with that of the controller.
In a further development of the invention, the front wall, the left wall and the right wall are provided with ventilation holes or ventilation slots.
In a further improvement of the present invention, the circuit board has a first mounting portion extending in a front wall direction and a second mounting portion extending in a rear wall direction, the main switch is inserted into the first mounting portion through the bent pin to be electrically connected to the circuit board, and the auxiliary switch is inserted into the second mounting portion through the bent pin to be electrically connected to the circuit board.
In a further development of the invention, the drive device comprises:
the stepping motor is arranged in the accommodating space and is detachably fixed on the bottom plate;
the transmission shaft is connected to the output end of the stepping motor;
the electric brush holder is provided with a rod part with a central hole and brush block mounting parts which are asymmetrically mounted at two ends of the rod part and are clamped at the upper part of the transmission shaft; and
and a brush block mounted into the brush block mounting portion and having a protruding end.
The invention is further improved in that the upper end of the transmission shaft is provided with a bearing, and the inner wall of the corresponding shell is provided with a fixing part matched with the bearing.
Another objective of the present invention is to provide a rotary multi-point switch switching control system, which is disposed between an upper computer and a device to be tested, and is based on the above rotary multi-point switch switching control device, including a controller, a switch array and a driving device;
the controller comprises a processing unit, a communication interface unit communicated with the processing unit, a feedback circuit unit communicated with the processing unit, a pulse generation circuit unit communicated with the processing unit and a control unit communicated with the processing unit;
the processing unit is used for information communication between the upper computer and the tested equipment and configuring the switches in the switch array; the communication interface unit is used for realizing communication between the processing unit and an upper computer; the feedback circuit unit is used for feeding back the action of the switch array unit to the processing unit; the pulse generating circuit unit is used for regulating and positioning the speed of the driving unit by controlling the pulse frequency; the control unit comprises a clock circuit, a system reset circuit and a communication display circuit, wherein the clock circuit is used for providing clock signals for the processing unit, the system reset circuit is used for inputting reset signals to reset the system to an initial state when the system runs abnormally, and the communication display circuit is used for displaying the state of receiving or sending data;
the switch array comprises a plurality of main switches and auxiliary switches which correspond to the postures of the main switches one by one, the action configuration of the switch array is realized by the processing unit through the selection of the switch contact of each main switch by the driving unit, and the selection of the switch contact of the corresponding auxiliary switch feeds back the closing state of the main switch to the controller unit through the feedback circuit;
the driving device comprises a stepping motor and a driving circuit for driving the stepping motor, wherein the driving circuit is used for receiving and controlling the rotating direction and distance of the stepping motor according to the control signal of the pulse generating circuit unit.
Another objective of the present invention is to provide a method for controlling switching of a rotary multi-point switch, which is based on the above-mentioned system, and comprises the following steps:
s1, after the control system is powered on and started, the upper computer control program enters initialization and opens a communication port;
s2, controlling the circulation to detect whether the communication receiving port has data receiving;
s3, after receiving the data, controlling and analyzing the data to obtain a switch to be controlled and a target state of the switch;
s4, calculating and outputting a signal state required by the closed switch by the controller according to the analyzed instruction;
s5, after the controller sends out a corresponding switch closing control signal, detecting the level of a corresponding feedback port;
s6, judging the switch closing result according to the level, if the switch closing result is low, the switch closing is successful, otherwise, the switch closing result is failed;
s7, the controller sends the result to an upper computer;
s8, the controller continues to loop to detect whether a new instruction arrives.
Compared with the prior art, the invention has the beneficial effects that:
1. compared with a system with the same switch number, the size and the volume of the device provided by the invention are smaller than those of the existing scheme, so that the cost is reduced;
2. the invention has the advantages that the state feedback detection of the self-provided switch greatly improves the safety and reliability of automatic test;
3. the switch node has good voltage resistance. The voltage-resistant performance of the switch in the prior art depends on the performance of the selected relay coil, and the higher the voltage-resistant performance is, the higher the cost and the volume are. The switch provided by the scheme has the advantages that one of two contacts is the copper brush, and the other contact is the copper contact coated on the circuit board, so that the switch has good voltage resistance and can be applied to a circuit loop from 0 to top kilovolt;
4. the invention adopts the stepping motor with mature technology as the execution unit, thereby simplifying the design of the corresponding control system.
Drawings
FIG. 1 is a schematic perspective view of an apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic perspective view of the other side of FIG. 1;
FIG. 3 is a schematic perspective view of the cover, front wall, rear wall, left wall and right wall of FIG. 1 with the cover, front wall, rear wall, left wall and right wall removed;
FIG. 4 is a schematic perspective view of the other side of FIG. 3;
FIG. 5 is a top view of FIG. 3;
FIG. 6 is a schematic perspective view of the injection molded tray of FIG. 3 with the bottom plate removed;
FIG. 7 is a schematic perspective view of the controller, main switch and auxiliary switch of FIG. 6 with the controller, main switch and auxiliary switch removed;
FIG. 8 is a schematic view of the structure of the step motor, the transmission shaft and the brush holder;
FIG. 9 is a schematic structural view of a cover plate;
FIG. 10 is a schematic view of the left, right and front walls connected together;
FIG. 11 is a schematic diagram of a control system of the present invention;
FIG. 12 is a schematic diagram of the peripheral circuitry of the controller according to one embodiment of the present invention;
FIG. 13 is a schematic diagram of a CAN interface circuit in accordance with an embodiment of the present invention;
FIG. 14 is a schematic diagram of a serial communication interface circuit according to an embodiment of the present invention;
FIG. 15 is a schematic diagram of a driving circuit according to an embodiment of the present invention;
FIG. 16 is a schematic view of contacts on circuit board 18 in accordance with one embodiment of the present invention;
FIG. 17 is a flow chart of a control method in one embodiment of the invention.
The reference numbers are as follows:
1. the device comprises a cover plate, 1-1 parts, a fixing part, 2 parts, a right wall, 3 parts, a bottom plate, 4 parts, a front wall, 5 parts, a main switch, 6 parts, a rear wall, 7 parts, a communication interface, 8 parts, a left wall, 9 parts, a controller, 10 parts, a stepping motor, 11 parts, an auxiliary switch, 12 parts, an injection molding disc, 13 parts, a bearing, 14 parts, a transmission shaft, 15 parts, a brush block mounting part, 16 parts, an electric brush holder, 17 parts, a brush block, 18 parts, a circuit board, 19 parts, an auxiliary switch positive electrode contact, 20 parts, a main switch positive electrode contact, 21 parts, an inner conductive ring, 22 parts, an outer conductive ring, 23 parts, a1 parts, a host computer, A21 parts, a communication interface units, A22 parts, a feedback circuit units, A23 parts, a control units, A24 parts, a pulse generation circuit units.
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.
As shown in fig. 1 to 10, a rotary multi-point switch switching device includes a housing, a driving device, a circuit board 18 disposed above the driving device, an injection molding tray 12 disposed above the circuit board 18, a main switch 5, an auxiliary switch 11, and a controller 9 are disposed in the housing, a transmission end of the driving device is connected to two brush blocks 17, one side of the circuit board 18 is electrically connected to the main switch 5, the other side of the main switch 5 extends out of the housing, the other side of the circuit board 18 is electrically connected to the auxiliary switch 11, the other side of the auxiliary switch 11 is electrically connected to the controller 9, and a communication interface 7 of the controller 9 extends out of the housing; wherein the content of the first and second substances,
an inner conducting ring 21 concentric with the hole of the injection molding disc 12 and an outer conducting ring 22 sleeved on the outer ring of the inner conducting ring 21 are arranged between the circuit board 18 and the injection molding disc 12, a distance is arranged between the inner edge of the outer conducting ring 22 and the outer edge of the inner conducting ring 21, a main switch 5 positive contact is uniformly distributed on the circuit board 18 along the outer edge of the inner conducting ring 21, auxiliary switch positive contacts are uniformly distributed on the circuit board 18 along the outer edge of the outer conducting ring 22, one end of each of the two brush blocks 17 corresponds to the inner conducting ring 21 and the outer conducting ring 22 respectively, and is in contact with or not in contact with the corresponding contact under the control of a driving device so as to realize the switching of lines, and the main switch 5 and the corresponding auxiliary switch 11 are.
In particular, the housing comprises a closed containing space surrounded by a bottom plate 3, a cover plate 1, a left wall 8, a right wall 2, a front wall 4 and a rear wall 6; the driving device is arranged on the bottom plate 3; the injection molding disc 12 is of a plate-shaped structure with a hole at the center and is detachably arranged between the left wall 8 and the right wall 2; the circuit board 18 is detachably mounted on the lower surface of the injection molding disc 12 and is matched with the injection molding disc 12 in shape; the main switch 5 is provided with a terminal and extends out of the front wall 4, and the other side of the main switch is electrically connected with the circuit board 18; the auxiliary switch 11 is connected to an I/O interface of the controller 9, and the other side of the auxiliary switch is electrically connected to the circuit board 18; the controller 9 is matched with the rear wall 6 and is provided with a communication interface 7, and the communication interface 7 extends out of the rear wall 6 to the outside.
In practical implementation, the lower portions of the left wall 8 and the right wall 2 are respectively recessed into the accommodating space to form a step portion 23, and the injection molding tray 12 and the circuit board 18 are detachably mounted on the step portions 23.
In specific implementation, the rear wall 6 includes a frame and a panel detachably connected to the frame, the panel has an opening adapted to the communication interface 7, and the panel is adapted to the controller 9.
In specific implementation, the front wall 4, the left wall 8 and the right wall 2 are provided with vent holes or vent grooves.
During specific implementation, circuit board 18 has the first installation department that extends to the 4 directions of antetheca and extends to the second installation department of 6 directions of back wall, main switch 5 inserts first installation department and 18 electric connection of circuit board through the looper, auxiliary switch 11 inserts second installation department and 18 electric connection of circuit board through the looper.
In a specific implementation, the driving device comprises:
the stepping motor 10 is arranged in the accommodating space and is detachably fixed on the bottom plate 3;
a transmission shaft 14 connected to an output end of the stepping motor 10;
an electric brush holder 16, which is provided with a rod part with a central opening and brush block 17 mounting parts 15 asymmetrically mounted at two ends of the rod part and is clamped to the upper part of the transmission shaft 14; and
and a brush block 17 mounted to the inside of the mounting portion 15 of the brush block 17 and having a protruding end.
In specific implementation, the upper end of the transmission shaft 14 is provided with a bearing 13, and the inner wall of the corresponding shell is provided with a fixing part 1-1 matched with the bearing 13, more specifically, a cover plate 1 on the shell.
In specific implementation, the brush block 17, the inner conductive ring 21 and the outer conductive ring 22 are made of copper, the material is copper with strong conductive capability, and the copper is strong in hardness and not easy to wear. The device is provided with two copper brushes, one of which is used as a negative contact of a main switch 5, and the other is used as a negative contact of an auxiliary switch. And two copper brushes are mounted on the electric brush frame 16, so that the balance is good.
In specific implementation, the controller 9 is an ARM Cortex-M3 processor, and is mainly responsible for communicating with an upper computer a1 in the test system, receiving a switch control instruction, generating a corresponding electric pulse signal, controlling the switch node by directly controlling the motion of the stepping motor 10, and feeding back the switch closing state.
In the above technical solution, any one group of switches is composed of two contacts corresponding to the brush blocks 17, and the step motor 10 is responsible for converting the received electrical pulse signal into an angular displacement signal, driving the brush blocks 17 to move on the injection molding disc 12, and controlling the contact between the copper brush and the contacts on the injection molding disc 12. The contact of the inner ring of the injection molding disc 12 is the anode contact of the main switch 5, and the contact and the corresponding copper brush form two contacts of the main switch 5 together, and the switch can be connected into an automatic test system to realize the switching of test circuits. All the main switches 5 in the device share one negative contact. The terminal side of the main switch 5 has a negative terminal connected to the brush block 17 as the negative terminal of the main switch 5 and a plurality of positive terminals connected to the inner ring contact of the injection plate 12. The terminal serves as a switch for a user to access the test line. The outer ring contact of the injection molding disc 12 is a positive electrode contact of the auxiliary switch 11, and the outer ring contact and the corresponding copper brush form two contacts of the auxiliary switch 11. Two ends of the switch are connected with an I/O port of a controller 9, when the main switch 5 is closed, a group of auxiliary switches are necessarily closed, and the controller 9 detects that the corresponding I/O port has low-level signal input. The auxiliary switch is mainly responsible for feeding back the closed state of the main switch 5 to the control unit a 23.
As shown in fig. 11, the present invention further provides a rotary multi-point switch switching control system, which is disposed between the upper computer a1 and the device under test, and the control system of the rotary multi-point switch switching control device includes a controller 9, a switch array and a driving device;
the controller 9 includes a processing unit A25, a communication interface unit A21 in communication with the processing unit A25, a feedback circuit unit A22 in communication with the processing unit A25, a pulse generation circuit unit A24 in communication with the processing unit A25, and a control unit A23 in communication with the processing unit A25;
the processing unit A25 is used for information communication between the upper computer A1 and the equipment to be tested, and configuring the switches in the switch array; the communication interface unit A21 is used for realizing the communication between the processing unit A25 and the upper computer A1; the feedback circuit unit A22 is used for feeding back the action of the switch array unit to the processing unit A25; the pulse generating circuit unit A24 is used for regulating and positioning the speed of the driving unit by controlling the pulse frequency; the control unit A23 comprises a clock circuit, a system reset circuit and a communication display circuit, wherein the clock circuit is used for providing clock signals for the processing unit A25, the system reset circuit is used for inputting reset signals to reset the system to an initial state when the system runs abnormally, and the communication display circuit is used for displaying the state of receiving or sending data;
the switch array comprises a plurality of main switches 5 and auxiliary switches 11 which are in one-to-one correspondence with the postures of the main switches 5, the action configuration is realized by a processing unit A25 through the selection of a driving unit to the switch contact of each main switch 5, and the selection of the switch contact of the corresponding auxiliary switch 11 feeds back the closing state of the main switches 5 to the controller 9 unit through a feedback circuit;
the driving device comprises a stepping motor 10 and a driving circuit A3 for driving the stepping motor 10, wherein the driving circuit A3 is used for receiving and controlling the rotating direction and distance of the stepping motor 10 according to the control signal of a pulse generating circuit unit A24.
As shown in fig. 17, the present invention further provides a method for controlling switching of a rotary multi-point switch, which is based on the above-mentioned system for controlling switching of a rotary multi-point switch, and comprises the following steps:
s1, after the control system is powered on and started, the control program of the upper computer A1 enters initialization, and a communication port is opened;
s2, controlling the circulation to detect whether the communication receiving port has data receiving;
s3, after receiving the data, controlling and analyzing the data to obtain a switch to be controlled and a target state of the switch;
s4, the controller 9 calculates and outputs the signal state required by the closed switch according to the analyzed instruction;
s5, after the controller 9 sends a corresponding switch closing control signal, detecting a corresponding feedback port level;
s6, judging the switch closing result according to the level, if the switch closing result is low, the switch closing is successful, otherwise, the switch closing result is failed;
s7, the controller 9 sends the result to an upper computer A1;
s8, the controller 9 continues to loop to detect whether a new instruction arrives.
When the invention is used, the invention can be more specifically implemented as follows:
the system electrical wiring is to include: the control unit A23 peripheral circuit, communication interface 7 circuit, stepping motor 10 drive circuit A3, stepping motor 10 and injection molding disc 12.
As shown in fig. 12, the peripheral circuits of the controller 9 mainly include a clock circuit, a system reset circuit, and a communication display circuit. Wherein the clock circuit provides the basic clock signal for the controller 9; when the system runs abnormally, a user can input a Reset signal to a Reset pin of the controller 9 through a Reset button by the Reset circuit, and the system is Reset to an initial state; the communication display circuit comprises a CAN and a serial port communication receiving and transmitting pin which are all provided with corresponding LED displays, when any pin has signal transmission, an LED lamp of the communication display circuit is turned on to remind a user that the system is currently receiving or sending data.
In addition, the I/O port of the controller 9 is configured with multiple functions, wherein G0-G29 are the positive electrodes of the 30 auxiliary switches of the system, when any auxiliary switch 11 is closed, the positive electrode of the auxiliary switch is pulled to a low level, and the controller 9 can determine that the auxiliary switch 11 is closed when the controller detects a low voltage signal at the corresponding I/O port, so as to determine that the corresponding main switch 5 is closed; L0/L1/L2 are pulse signals, direction signals and enable signals for controlling the displacement of the stepping motor 10, respectively.
The system supports two communication modes of a serial port and a CAN, the communication interface 7 is provided with a serial port interface and a CAN interface, and a CAN interface circuit is shown in figure 13, wherein CAN1 RX and CAN1 TX are a pair of TTL level receiving and transmitting signals. CANH and CANL are differential signals on a CAN bus, and the system adopts a CAN interface chip with an isolation function, so that the conversion of CAN1 RX and CAN1 TX signals with CANH and CANL signals CAN be realized. As shown in fig. 14, the serial communication interface 7 circuit controls connection or interruption of serial communication by controlling a serial enable signal 485-EN, the UART1 is a signal receiving pin of the controller 9, the UART2 is a signal sending pin of the controller 9, and 485-B and 485-a are a sending terminal and a receiving terminal of a communication object, respectively.
As shown in fig. 15, the L0/L1/L2 signals output from the controller 9 of the driving circuit a3 of the stepping motor 10 are amplified and used as an enable signal EN, a pulse signal CLK and a displacement direction DIR (clockwise/counter-clockwise) for driving the stepping motor 10. The three signals are isolated by optocouplers U1/U3/U4 and then are respectively connected with a control pin EN/CLK/DIR of a driving module U2 of the stepping motor 10. The design adopts a bipolar stepping motor 10 driving module with a PWM chopping function, and the module can generate driving signals A +/A-, B +/B-of the bipolar stepping motor 10 according to input control signals and directly control the rotation direction and distance of the stepping motor 10. Meanwhile, the winding is adopted to utilize a higher four-wire bipolar driving stepping motor 10, the movement of the negative pole point of the main/auxiliary switch 11 is realized by controlling the movement direction and distance of the winding, when the stepping motor 10 drives the copper brush to move to be in contact with a certain disc contact, the positive pole point and the negative pole point of the group of switches are in contact, and the switches are closed.
The circuit board 18 in this design is a printed circuit board, and as shown in fig. 16, the surface has two inner and outer circles of contacts, where the inner circle of contacts corresponds to the positive pole of the main switch 5, and the outer circle of contacts corresponds to the negative pole of the main switch. When the copper brush moves to be in contact with the positive pole of a certain main switch m, the main switch m is closed, the test loop is connected, meanwhile, the other symmetrical copper brush is in contact with the positive pole of an auxiliary switch m, the auxiliary switch is closed, and the controller 9 reads corresponding I/O port data to judge the closed state of the switch.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A rotary multi-point switch switching device is characterized by comprising a shell, wherein a driving device, a circuit board arranged above the driving device, an injection molding disc arranged above the circuit board, a main switch, an auxiliary switch and a controller are arranged in the shell, a transmission end of the driving device is connected with two brush blocks, one side of the circuit board is electrically connected with the main switch, the other side of the main switch extends out of the shell, the other side of the circuit board is electrically connected with the auxiliary switch, the other side of the auxiliary switch is electrically connected to the controller, and a communication interface of the controller extends out of the shell; wherein the content of the first and second substances,
the circuit board is characterized in that an inner conducting ring concentric with an opening of the injection molding disc and an outer conducting ring sleeved on the outer ring of the inner conducting ring are arranged between the circuit board and the injection molding disc, a distance is arranged between the inner edge of the outer conducting ring and the outer edge of the inner conducting ring, main switch positive contacts are uniformly distributed on the circuit board along the outer edge of the inner conducting ring, auxiliary switch positive contacts are uniformly distributed on the circuit board along the outer edge of the outer conducting ring, one ends of the two brush blocks respectively correspond to the inner conducting ring and the outer conducting ring and are in contact with or not in contact with the corresponding contacts under the control of the driving device to realize the switching of lines, and the main switch and the corresponding auxiliary switches are.
2. A rotary multi-point switch switching device as claimed in claim 1, wherein: the housing includes an enclosed accommodating space surrounded by a bottom plate, a cover plate, a left wall, a right wall, a front wall and a rear wall; the driving device is arranged on the bottom plate; the injection molding disc is of a plate-shaped structure with a hole in the center and is detachably arranged between the left wall and the right wall; the circuit board is detachably mounted on the lower surface of the injection molding disc and is matched with the injection molding disc in shape; the main switch is provided with a terminal and extends out of the front wall, and the other side of the main switch is electrically connected with the circuit board; the auxiliary switch is connected to the I/O interface of the controller, and the other side of the auxiliary switch is electrically connected with the circuit board; the controller is matched with the rear wall and is provided with a communication interface, and the communication interface extends out of the rear wall to the outside.
3. A rotary multi-point switch switching device as claimed in claim 2, wherein: the lower parts of the left wall and the right wall are respectively concave towards the accommodating space to form step parts, and the injection molding disc and the circuit board are detachably mounted on the step parts.
4. A rotary multi-point switch switching device as claimed in claim 2, wherein: the rear wall comprises a frame body and a panel detachably connected with the frame body, an opening matched with the communication interface is formed in the panel, and the shape of the panel is matched with that of the controller.
5. A rotary multi-point switch switching device as claimed in claim 2, wherein: and the front wall, the left wall and the right wall are provided with ventilation holes or ventilation grooves.
6. A rotary multi-point switch switching device as claimed in claim 2, wherein: the circuit board has the first installation department that extends to the antetheca direction and extends to the second installation department of back wall direction, main switch inserts to first installation department and circuit board electric connection through the looper, the auxiliary switch inserts to second installation department and circuit board electric connection through the looper.
7. A rotary multipoint switch switching device according to claim 2 wherein said drive means comprises:
the stepping motor is arranged in the accommodating space and is detachably fixed on the bottom plate;
the transmission shaft is connected to the output end of the stepping motor;
the electric brush holder is provided with a rod part with a central hole and brush block mounting parts which are asymmetrically mounted at two ends of the rod part and are clamped at the upper part of the transmission shaft; and
and a brush block mounted into the brush block mounting portion and having a protruding end.
8. The rotary multi-point switch switching device of claim 7, wherein: the transmission shaft upper end is provided with the bearing, is provided with the fixed part with bearing looks adaptation on the inner wall that corresponds the shell.
9. A rotary multipoint switch switching control system arranged between an upper computer and a device to be tested, characterized in that the control system is based on a rotary multipoint switch switching control device according to any one of claims 1-8, comprising a controller, a switch array and a driving device;
the controller comprises a processing unit, a communication interface unit communicated with the processing unit, a feedback circuit unit communicated with the processing unit, a pulse generation circuit unit communicated with the processing unit and a control unit communicated with the processing unit;
the processing unit is used for information communication between the upper computer and the tested equipment and configuring the switches in the switch array; the communication interface unit is used for realizing communication between the processing unit and an upper computer; the feedback circuit unit is used for feeding back the action of the switch array unit to the processing unit; the pulse generating circuit unit is used for regulating and positioning the speed of the driving unit by controlling the pulse frequency; the control unit comprises a clock circuit, a system reset circuit and a communication display circuit, wherein the clock circuit is used for providing clock signals for the processing unit, the system reset circuit is used for inputting reset signals to reset the system to an initial state when the system runs abnormally, and the communication display circuit is used for displaying the state of receiving or sending data;
the switch array comprises a plurality of main switches and auxiliary switches which correspond to the postures of the main switches one by one, the action configuration of the switch array is realized by the processing unit through the selection of the switch contact of each main switch by the driving unit, and the selection of the switch contact of the corresponding auxiliary switch feeds back the closing state of the main switch to the controller unit through the feedback circuit;
the driving device comprises a stepping motor and a driving circuit for driving the stepping motor, wherein the driving circuit is used for receiving and controlling the rotating direction and distance of the stepping motor according to the control signal of the pulse generating circuit unit.
10. A rotary multipoint switch switching control method, characterized in that the method is based on a rotary multipoint switch switching control system as claimed in claim 9, comprising the following steps:
s1, after the control system is powered on and started, the upper computer control program enters initialization and opens a communication port;
s2, controlling the circulation to detect whether the communication receiving port has data receiving;
s3, after receiving the data, controlling and analyzing the data to obtain a switch to be controlled and a target state of the switch;
s4, calculating and outputting a signal state required by the closed switch by the controller according to the analyzed instruction;
s5, after the controller sends out a corresponding switch closing control signal, detecting the level of a corresponding feedback port;
s6, judging the switch closing result according to the level, if the switch closing result is low, the switch closing is successful, otherwise, the switch closing result is failed;
s7, the controller sends the result to an upper computer;
s8, the controller continues to loop to detect whether a new instruction arrives.
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| CN201811138627.8A CN109343385B (en) | 2018-09-28 | 2018-09-28 | Rotary type multi-point switch switching device, control system and control method |
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| CN111968344B (en) * | 2020-07-31 | 2022-01-11 | 中国铁道科学研究院集团有限公司 | Signal interface detection equipment and method for railway earthquake early warning monitoring system |
| CN113156255A (en) * | 2021-05-11 | 2021-07-23 | 天津七一二移动通信有限公司 | Device capable of switching multi-channel signals in autonomous rotation mode and implementation method |
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