CN109406996B - Multifunctional test circuit of direct current speed regulation switch - Google Patents
Multifunctional test circuit of direct current speed regulation switch Download PDFInfo
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- CN109406996B CN109406996B CN201811446344.XA CN201811446344A CN109406996B CN 109406996 B CN109406996 B CN 109406996B CN 201811446344 A CN201811446344 A CN 201811446344A CN 109406996 B CN109406996 B CN 109406996B
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- 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 provides a multifunctional test circuit of a direct current speed regulation switch, which comprises: the device comprises a first detection circuit, a second detection circuit, a first test switch, a second test switch, a circuit selection switch and a controller, wherein the first detection circuit is connected with one end of the first test switch and is used for detecting a braking function, a diode and a reversing function of a direct current speed regulation switch; one end of the second detection circuit is connected with one end of the first test switch, and the other end of the second detection circuit is respectively connected with one ends of the circuit selection switch and the second test switch, so that the speed regulation function and the switch operating force of the direct current speed regulation switch are detected; the input end of the motor of the direct current speed regulation switch is connected with the first test switch, and the output end of the motor of the direct current speed regulation switch is connected with the second test switch; the controller generates a control signal according to the operation information input by the user to control the circuit selection switch to select the currently operated detection circuit. The automatic multifunctional detection of the direct current speed regulation switch is realized, the circuit structure is simple, and the detection efficiency is greatly improved.
Description
Technical Field
The invention relates to the field of detection of direct current speed regulation switches, in particular to a multifunctional test circuit of a direct current speed regulation switch.
Background
The DC motor has the characteristics of low rotation speed and large moment, and is irreplaceable by the AC motor, so that the DC motor is widely applied to various industrial equipment. The DC speed regulating switch is used for regulating the rotating speed of a DC motor in various electric tools such as an electric drill, the performance of the DC speed regulating switch directly influences the work of the DC motor, and further, the performance of a product is influenced.
At present, most of common test modes are manual detection, which is not beneficial to detecting the direct current speed regulation switch product in production, has low test efficiency and single test function, is generally limited to detecting the whole speed regulation function and overload protection function of the whole direct current speed regulation switch, and lacks of test tools for comprehensively testing the direct current speed regulation switch in the prior art.
Disclosure of Invention
The invention aims to solve the technical problems that the detection mode of a direct current speed regulation switch product in the prior art is low in efficiency, single in test function and incapable of realizing comprehensive detection.
The embodiment of the invention provides a multifunctional test circuit of a direct current speed regulation switch, which comprises the following components: the circuit comprises a first detection circuit, a second detection circuit, a first test switch, a second test switch, a circuit selection switch and a controller, wherein the first detection circuit is connected with one end of the first test switch and is used for detecting a braking function, a diode and a reversing function of a direct current speed regulation switch; one end of the second detection circuit is connected with one end of the first test switch, and the other end of the second detection circuit is respectively connected with one ends of the circuit selection switch and the second test switch and is used for detecting the speed regulation function and the switch operation force of the direct current speed regulation switch; the input end of a motor of the direct current speed regulation switch is connected with the first test switch, and the output end of the motor is connected with the second test switch; the controller generates a control signal according to the operation information input by the user, and controls the circuit selection switch to select the currently-working detection circuit according to the control signal.
Optionally, the first detection circuit includes: the device comprises a first switch, a first solid-state relay, a first resistor and a second switch, wherein the first switch is connected with a first input end of the first solid-state relay, a second input end of the first solid-state relay is connected with one end of the first resistor, and a second end of the first resistor is connected with the second switch in series and then connected with the first test switch; the output end of the first solid-state relay generates an output level signal according to the level signals input by the first input end and the second input end; and generating a first detection result for detecting the braking function, the diode and the reversing function of the direct current speed regulation switch according to the output level signal.
Optionally, the second detection circuit includes: the device comprises a third switch, a load resistor, a fourth switch, a first voltage acquisition module, a current acquisition module and a frequency acquisition module, wherein one end of the third switch is connected with the first test switch, the other end of the third switch is connected with one end of the fourth switch after being connected in series with the load resistor, and the other end of the fourth switch is connected with the second test switch; the first voltage acquisition module is connected with the load resistor in parallel and is used for acquiring a voltage signal of the load resistor; the current acquisition module is connected with the load resistor in parallel and is used for acquiring a current signal of the load resistor; the frequency acquisition module is connected with the load resistor in parallel and is used for acquiring a frequency signal of the load resistor; and generating a second detection result for detecting the speed regulating function and the switch operating force of the direct current speed regulating switch according to the voltage signal, the current signal and the frequency signal.
Optionally, the multifunctional test circuit of the direct current speed regulation switch further comprises: and the third detection circuit is connected in series with the temperature protection circuit of the direct current speed regulation switch and is used for detecting the temperature protection function, the voltage starting function and the overload protection function of the direct current speed regulation switch.
Optionally, the third detection circuit includes: the temperature protection circuit comprises a voltage output module, a second voltage acquisition module and a third test switch, wherein the voltage output module is connected with one end of the third test switch after being connected with the second voltage acquisition module in parallel, and the temperature protection circuit is connected with the third test switch; the voltage output module is used for adjusting the voltage of the temperature protection circuit according to a preset voltage; the second voltage acquisition module is used for detecting the actual voltage of the temperature protection circuit; and generating a third detection result for detecting the temperature protection function, the voltage starting function and the overload protection function of the direct current speed regulation switch according to the relation between the actual voltage and the preset voltage.
Optionally, when the circuit selection switch is turned on, the currently operated detection circuit is the first detection circuit; when the circuit selection switch is turned off, the currently operated detection circuit is the second detection circuit.
Optionally, the multifunctional test circuit of the direct current speed regulation switch further comprises: and the power supply circuit is used for supplying power to the first detection circuit, the second detection circuit, the third detection circuit and the direct current speed regulation switch.
Optionally, the power supply circuit includes: the control system comprises a program-controlled direct-current power supply, a current induction switch and a second solid-state relay, wherein the program-controlled direct-current power supply is connected with the current induction switch in series and then is connected with the output end of the second solid-state relay; the current induction switch is used for detecting a current signal of the program-controlled direct-current power supply; the controller is also used for controlling the voltage output value of the program-controlled direct-current power supply according to a preset voltage value, sending a switching signal to the input end of the second solid-state relay and controlling the switching state of the second solid-state relay.
Optionally, the controller is further configured to control a resistance value of the load resistor according to a preset resistance value.
Optionally, the controller is connected with an output end of the first solid-state relay, and is configured to receive the output level signal, and generate the first detection result according to the output level signal.
The technical scheme of the invention has the following advantages:
the embodiment of the invention provides a multifunctional test circuit of a direct current speed regulation switch, which comprises: the controller selects the first detection circuit and the second detection circuit to work through the circuit selection switch, wherein the first detection circuit detects the braking function, the diode and the reversing function of the direct current speed regulation switch, the second detection circuit detects the speed regulation function and the switch operating force of the direct current speed regulation switch, the multifunctional detection of the direct current speed regulation switch is realized, the circuit structure is simple, the control of the multifunctional test is carried out through the controller, the automatic detection is realized, and the detection efficiency is greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a DC speed control switch according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a multifunctional test circuit of a DC speed switch according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of another embodiment of a multifunctional test circuit of a DC speed switch;
fig. 4 is a schematic diagram of another structure of a dc speed regulating switch according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, or can be communicated inside the two components, or can be connected wirelessly or in a wired way. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
In practical application, a basic structure diagram of the dc speed regulating switch is shown in fig. 1, and the dc speed regulating switch mainly comprises a brake T, a freewheeling diode D, a commutation mechanism G, a motor M, a first circuit switch K1, a second circuit switch K2, a PCB circuit and a MOS circuit, wherein the motor M comprises an input end M1 and an output end M2, the brake T, the freewheeling diode D, the commutation mechanism G and the motor M are connected in parallel and then connected in series with the MOS circuit, and then connected in parallel with the PCB circuit and then connected in series with the first circuit switch K1, the second circuit switch K2 is connected in parallel with both ends of the first circuit switch K1 and the MOS circuit, and the dc speed regulating switch is powered by the dc power supply B. When the direct current speed regulating switch works, the servo can drive the mechanism to press the first circuit switch K1 and the second circuit switch K2 in the direct current speed regulating switch by controlling the external servo motor, the air cylinder and other elements to perform preset actions, the positions and the states of the actions of the switches are correspondingly changed, and the air cylinder performs reversing actions and the like.
The embodiment of the invention provides a multifunctional test circuit of a direct current speed regulation switch, as shown in fig. 2, the multifunctional test circuit of the direct current speed regulation switch comprises: the device comprises a first detection circuit 1, a second detection circuit 2, a first test switch KM1, a second test switch KM2, a circuit selection switch K and a controller 3, wherein the first detection circuit 1 is connected with one end of the first test switch KM1 and is used for detecting a braking function, a diode and a reversing function of a direct current speed regulation switch; one end of the second detection circuit 2 is connected with one end of the first test switch KM1, and the other end of the second detection circuit 2 is respectively connected with one ends of the circuit selection switch K and the second test switch KM2 and is used for detecting the speed regulation function and the switch operation force of the direct current speed regulation switch; an input end M1 of a motor M of the direct current speed regulation switch is connected with a first test switch KM1, and an output end M2 of the motor M is connected with a second test switch KM 2; the controller 3 generates a control signal according to the operation information input by the user, and controls the circuit selection switch K to select the currently operated detection circuit according to the control signal.
In practical application, the number of the circuit selection switches K may be multiple, and the detection circuits that work currently may be switched by simultaneously switching on and off the circuit selection switches K, so as to improve the safety of switching the detection circuits and avoid misoperation.
Through the cooperation of the components, the multifunctional test circuit of the direct current speed regulation switch realizes the multifunctional detection of the direct current speed regulation switch, has a simple circuit structure, realizes the automatic detection by controlling the multifunctional test through the controller, and greatly improves the detection efficiency.
The following describes in detail a multifunctional test circuit of a dc speed regulation switch provided by the embodiment of the present invention with reference to a specific application example.
In a preferred embodiment, as shown in fig. 3, the first detection circuit 1 includes: the testing device comprises a first switch KA1, a first solid-state relay KW1, a first resistor R1 and a second switch KA2, wherein the first switch KA1 is connected with a first input end of the first solid-state relay KW1, a second input end of the first solid-state relay KW1 is connected with one end of the first resistor R1, and a second end of the first resistor R1 is connected with the first testing switch KM1 after being connected with the second switch KA2 in series; the output end of the first solid state relay KW1 generates an output level signal according to the level signals input by the first input end and the second input end; and generating a first detection result for detecting the braking function, the diode and the reversing function of the direct current speed regulation switch according to the output level signal. In practical application, the servo can drive the mechanism to press two switches in the direct current speed regulation switch by controlling and controlling the external servo motor, the air cylinder and other elements to perform preset actions, the positions and states of the switch actions have corresponding requirements, the air cylinder has reversing actions, and the corresponding positions and actions of the switch change to prompt the first solid state relay KW1 to act, so that whether the braking function, the diode and the reversing function are good or bad is judged through whether the first solid state relay KW1 is switched on or off or not, and a first detection result is generated.
In a preferred embodiment, as shown in fig. 3, the second detection circuit 2 includes: the device comprises a third switch KA3, a load resistor R2, a fourth switch KA4, a first voltage acquisition module U1, a current acquisition module I1 and a frequency acquisition module F1, wherein one end of the third switch KA3 is connected with a first test switch KM1, the other end of the third switch KA3 is connected with one end of the fourth switch KA4 after being connected with the load resistor R2 in series, and the other end of the fourth switch KA4 is connected with a second test switch KM 2; the first voltage acquisition module U1 is connected with the load resistor R2 in parallel and is used for acquiring a voltage signal of the load resistor R2; the current acquisition module I1 is connected with the load resistor R2 in parallel and is used for acquiring a current signal of the load resistor R2; the frequency acquisition module F1 is connected with the load resistor R2 in parallel and is used for acquiring a frequency signal of the load resistor R2; and generating a second detection result for detecting the speed regulating function and the switch operating force of the direct current speed regulating switch according to the voltage signal, the current signal and the frequency signal.
In practical application, the servo can drive the mechanism to press two switches in the direct current speed regulation switch by controlling elements such as an external servo motor, an air cylinder and the like to perform preset actions, the positions and the states of the switch actions have corresponding requirements, the air cylinder has reversing actions, and the output state of the switch can change along with gradual increase of displacement in the pressing process; the second detection result is obtained by detecting whether the state of the electric parameter of the switch and the change of the switch operating force meet the requirements or not through the current acquisition module I1, the first voltage acquisition module U1, the frequency acquisition module F1 and the like. In addition, in practical application, the change of the corresponding state of the indicator light during the switch-on process can be detected by adding a light induction sensor to the second detection circuit 2, which is not limited in the invention.
Specifically, in an embodiment, when the controller 3 controls the circuit selection switch K to be turned on, the currently operated detection circuit is the first detection circuit 1, that is, the detection of the braking function, the diode and the commutation function of the dc speed regulation switch is started; when the controller 3 controls the circuit selection switch K to be turned off, the currently operated detection circuit is the second detection circuit 2, that is, the speed regulation function and the switch operation force of the dc speed regulation switch are detected.
In practical application, another basic structure diagram of the dc speed-regulating switch is shown in fig. 4, and mainly includes a brake T, a freewheeling diode D, a commutation mechanism G, a motor M, a first circuit switch K1, a second circuit switch K2, and a PCB circuit and a MOS circuit, where the brake T, the freewheeling diode D, the commutation mechanism G and the motor M are connected in parallel and then connected in series with the MOS circuit, and then connected in parallel with the PCB circuit and then connected in series with the first circuit switch K1, and the second circuit switch K2 is connected in parallel with two ends of the first circuit switch K1, and the dc speed-regulating switch is powered by the dc power supply B. In the circuit, a temperature protection circuit is arranged in a PCB circuit, and the temperature protection circuit has a temperature protection function, a voltage starting function and an overload protection function so as to protect a direct current speed regulation switch from being damaged. When the direct current speed regulation switch works, the servo can drive the mechanism to press the first circuit switch K1 and the second circuit switch K2 in the direct current speed regulation switch by controlling elements such as an external motor, an air cylinder and the like to perform preset actions, the positions and the states of the actions of the switches are correspondingly changed, and the air cylinder performs reversing actions and the like.
In a preferred embodiment, as shown in fig. 3, the multifunctional test circuit of the dc speed regulation switch further includes: the third detection circuit 4 is connected in series with the temperature protection circuit of the direct current speed regulation switch, and is used for detecting the temperature protection function, the voltage starting function and the overload protection function of the direct current speed regulation switch.
Specifically, in one embodiment, as shown in fig. 3, the third detection circuit 4 includes: the device comprises a voltage output module UT, a second voltage acquisition module U2 and a third test switch KM3, wherein the voltage output module UT is connected with one end of the third test switch KM3 after being connected with the second voltage acquisition module U2 in parallel, and a temperature protection circuit is connected with the third test switch KM 3; the voltage output module UT is used for adjusting the voltage of the temperature protection circuit according to a preset voltage; the second voltage acquisition module U2 is used for detecting the actual voltage of the temperature protection circuit; and generating a third detection result for detecting the temperature protection function, the voltage starting function and the overload protection function of the direct current speed regulation switch according to the relation between the actual voltage and the preset voltage. In the embodiment of the present invention, the temperature protection circuit of the dc speed regulation switch is detected by the third detection circuit 4.
In practical application, the servo can drive the mechanism to push two switches in the direct current speed regulation switch by controlling the external servo motor, the cylinder and other elements to perform preset actions, the servo can drive the mechanism to push the switch to the corresponding position, the voltage output module UT adjusts the voltage of the temperature protection circuit by setting different values for the voltage output module UT, and the second voltage acquisition module U2 acquires different values under different voltage values to judge whether the temperature protection function, the voltage starting function and the overload protection function of the direct current speed regulation switch meet the requirements.
In practical applications, the first voltage acquisition module U1, the second voltage acquisition module U2, and the current acquisition module may be implemented by using an existing analog acquisition card, for example, an analog acquisition card with a model of DAM-7401, the frequency acquisition module F1 may be implemented by using an existing frequency acquisition card, for example, a frequency acquisition card with a model of IPRM-7404, and the voltage output module UT may be implemented by using an existing analog output module, for example, an analog output module with a model of IPRM-4404.
In a preferred embodiment, as shown in fig. 3, the multifunctional test circuit of the dc speed regulation switch further includes: and the power supply circuit 5 is used for supplying power to the first detection circuit 1, the second detection circuit 2, the third detection circuit 4 and the direct current speed regulation switch. The power supply circuit 5 includes: the programmable direct current power supply B, the current induction switch KI and the second solid state relay KW2 are connected in series and then connected to the output end of the second solid state relay KW 2; the current induction switch KI is used for detecting a current signal of the program-controlled direct-current power supply B; the controller 3 is further configured to control a voltage output value of the programmable dc power supply B according to a preset voltage value, and send a switching signal to an input end of the second solid state relay KW2, so as to control a switching state of the second solid state relay KW 2. The power supply circuit 5 realizes flexible power supply to each detection circuit and the direct current speed regulation switch, avoids frequent replacement of a test power supply, further improves the detection efficiency, and further realizes automatic detection of the direct current speed regulation switch.
Specifically, in one embodiment, the controller 3 is further configured to control the resistance value of the load resistor R2 according to the preset resistance value. Therefore, a user can flexibly control the resistance value of the load resistor R2 through the PLC according to actual detection requirements, the detection efficiency is further improved, and further the automatic detection of the direct current speed regulation switch is realized.
Specifically, in one embodiment, the controller 3 is connected to the output terminal of the first solid state relay KW1, and is configured to receive the output level signal and generate the first detection result according to the output level signal. In practical application, the output result of the first solid state relay KW1 may be directly fed back to the controller 3, and the detection result may be directly output by using the powerful analysis and processing capability of the controller 3. In addition, the controller 3 can be connected with a first voltage acquisition module U1, a current acquisition module I1 and a frequency acquisition module F1 in the second detection circuit 2 and a second voltage acquisition module U2 in the third detection circuit 4, various acquired data are sent to the controller 3, and corresponding detection results are obtained after analysis is performed through the controller 3, so that manual judgment of detection results is avoided, automatic generation of the detection results is realized, and automatic detection of the direct current speed regulation switch is further realized.
In practical application, the first test switch KM1, the second test switch KM2 and the third test switch KM3 may be set into a plurality of groups according to needs, each group includes the first test switch KM1, the second test switch KM2 and the third test switch KM3, each group may be connected with a dc speed regulating switch, when a certain group of switches are all closed to detect the dc speed regulating switch, the rest dc speed regulating switches may be connected to the corresponding switches of other groups, when the group is detected, only the switch of the group is required to be opened, and a group of switches connected with the dc speed regulating switch is selected to be closed, so that another dc speed regulating switch may be detected, thereby avoiding the time of replacing the dc speed regulating switch and further improving the detection efficiency.
In practical application, the controller 3 may be a PLC controller, or may be a PLC controller in combination with other external processors, such as a single chip microcomputer, to achieve a corresponding control function, which is not limited in the present invention.
In practical application, the process of performing the function test on the direct current speed regulation switch by the multifunctional test circuit of the direct current speed regulation switch in the embodiment of the invention is as follows:
1. when the braking function, the diode and the reversing function of the direct current speed regulating switch are detected, the controller 3 is used for controlling the program control direct current power supply B to provide a set voltage, then the controller 3 is used for controlling the first switch KA1, the second switch KA2, the circuit selection switch K, the first test switch KM1 and the second test switch KM2 to be closed, then the external servo motor, the air cylinder and other elements are controlled to perform corresponding actions, the servo can drive the mechanism to press two switches in the direct current speed regulating switch, the change of the corresponding positions and actions of the switches can promote the action of the first solid state relay KW1, and whether the first solid state relay KW1 is connected or disconnected is judged according to the signal.
2. When the speed regulating function and the switch operating force of the direct current speed regulating switch are detected, firstly, a controller 3 controls a programmable direct current power supply B to provide a set voltage and a load resistor R2 to provide a set load, then, the controller 3 controls the third switch KA3, the fourth switch KA4, the first test switch KM1 and the second test switch KM2 to be closed, and then, the servo can drive a mechanism to press two switches in the direct current speed regulating switch by controlling elements such as an external servo motor, a cylinder and the like, and the output state of the switch is changed along with the gradual increase of displacement in the pressing process of the switch; the second detection result is obtained by detecting whether the state of the electric parameter of the switch and the change of the switch operating force meet the requirements or not through the current acquisition module I1, the first voltage acquisition module U1, the frequency acquisition module F1 and the like. In addition, in practical application, the change of the corresponding state of the indicator light during the switch-on process can be detected by adding a light induction sensor to the second detection circuit 2, which is not limited in the invention.
3. When the temperature protection circuit is arranged in the direct current speed regulation switch, the temperature protection function, the voltage starting function and the overload protection function of the temperature protection circuit are detected, firstly, the controller 3 controls the program-controlled direct current power supply B to give a set voltage and give a set load to the load resistor R2, then, the controller 3 controls the third switch KA3, the fourth switch KA4, the first test switch KM1, the second test switch KM2 and the third test switch KM3 to be closed, then, the external servo motor, the cylinder and other elements are controlled to perform corresponding actions, the servo can drive the mechanism to press the two switches in the direct current speed regulation switch, different values are set for the voltage output module UT, the voltage of the temperature protection circuit is regulated by the voltage output module UT, the temperature protection function and the voltage starting function of the direct current speed regulation switch are judged by collecting different values of the second voltage collecting module U2 under different voltage values, different current values are set by the controller 3, and different current values are judged by the controller 3 adjusting the size of the load resistor R2, and the voltage collecting functions under different values of the second voltage collecting module U2 meet the requirements of the direct current protection.
Through the cooperation of the components, the multifunctional test circuit of the direct current speed regulation switch realizes the multifunctional detection of the direct current speed regulation switch, has a simple circuit structure, performs the control of multifunctional test through the controller, greatly improves the detection efficiency, avoids the manual judgment of the detection result, realizes the automatic generation of the detection result, and further realizes the automatic detection of the direct current speed regulation switch.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (10)
1. A multifunctional test circuit of a DC speed regulating switch is characterized by comprising: a first detection circuit (1), a second detection circuit (2), a first test switch (KM 1), a second test switch (KM 2), a circuit selection switch (K) and a controller (3), wherein,
the first detection circuit (1) is connected with one end of the first test switch (KM 1) and is used for detecting the braking function, the diode and the reversing function of the direct current speed regulation switch;
one end of the second detection circuit (2) is connected with one end of the first test switch (KM 1), and the other end of the second detection circuit (2) is respectively connected with one ends of the circuit selection switch (K) and the second test switch (KM 2) and is used for detecting the speed regulation function and the switch operation force of the direct current speed regulation switch;
the input end of a motor of the direct current speed regulation switch is connected with the first test switch (KM 1), and the output end of the motor is connected with the second test switch (KM 2);
the controller (3) generates a control signal according to the operation information input by the user, and controls the circuit selection switch (K) to select the currently operated detection circuit according to the control signal.
2. The multifunctional test circuit of a direct current speed regulating switch according to claim 1, characterized in that the first detection circuit (1) comprises: a first switch (KA 1), a first solid state relay (KW 1), a first resistor (R1) and a second switch (KA 2), wherein,
the first switch (KA 1) is connected with the first input end of the first solid state relay (KW 1), the second input end of the first solid state relay (KW 1) is connected with one end of the first resistor (R1), and the second end of the first resistor (R1) is connected with the second switch (KA 2) in series and then connected with the first test switch (KM 1);
the output end of the first solid state relay (KW 1) generates an output level signal according to the level signals input by the first input end and the second input end;
and generating a first detection result for detecting the braking function, the diode and the reversing function of the direct current speed regulation switch according to the output level signal.
3. The multifunctional test circuit of a direct current speed regulating switch according to claim 1, characterized in that the second detection circuit (2) comprises: a third switch (KA 3), a load resistor (R2), a fourth switch (KA 4), a first voltage acquisition module (U1), a current acquisition module (I1) and a frequency acquisition module (F1), wherein,
one end of the third switch (KA 3) is connected with the first test switch (KM 1), the other end of the third switch (KA 3) is connected with one end of the fourth switch (KA 4) after being connected with the load resistor (R2) in series, and the other end of the fourth switch (KA 4) is connected with the second test switch (KM 2);
the first voltage acquisition module (U1) is connected with the load resistor (R2) in parallel and is used for acquiring a voltage signal of the load resistor (R2);
the current acquisition module (I1) is connected with the load resistor (R2) in parallel and is used for acquiring a current signal of the load resistor (R2);
the frequency acquisition module (F1) is connected with the load resistor (R2) in parallel and is used for acquiring a frequency signal of the load resistor (R2);
and generating a second detection result for detecting the speed regulating function and the switch operating force of the direct current speed regulating switch according to the voltage signal, the current signal and the frequency signal.
4. The multi-function test circuit of a dc speed switch of claim 1, further comprising:
and the third detection circuit (4) is connected in series with the temperature protection circuit of the direct current speed regulation switch and is used for detecting the temperature protection function, the voltage starting function and the overload protection function of the direct current speed regulation switch.
5. The multifunctional test circuit of a direct current speed regulating switch according to claim 4, characterized in that the third detection circuit (4) comprises: a voltage output module (UT), a second voltage acquisition module (U2) and a third test switch (KM 3), wherein,
the voltage output module (UT) is connected with one end of the third test switch (KM 3) after being connected with the second voltage acquisition module (U2) in parallel, and the temperature protection circuit is connected with the third test switch (KM 3);
the voltage output module (UT) is used for adjusting the voltage of the temperature protection circuit according to a preset voltage;
the second voltage acquisition module (U2) is used for detecting the actual voltage of the temperature protection circuit;
and generating a third detection result for detecting the temperature protection function, the voltage starting function and the overload protection function of the direct current speed regulation switch according to the relation between the actual voltage and the preset voltage.
6. The multifunctional test circuit of a direct current speed regulating switch according to claim 1, characterized in that the currently operating detection circuit is the first detection circuit (1) when the circuit selection switch (K) is closed;
when the circuit selection switch (K) is turned off, the currently operated detection circuit is the second detection circuit (2).
7. The multi-function test circuit of a dc speed switch of claim 4, further comprising: and the power supply circuit (5) is used for supplying power to the first detection circuit (1), the second detection circuit (2), the third detection circuit (4) and the direct current speed regulation switch.
8. The multifunctional test circuit of a direct current speed regulating switch according to claim 7, characterized in that the power supply circuit (5) comprises: a program-controlled direct current power supply (B), a current induction switch (KI) and a second solid state relay (KW 2),
the program-controlled direct-current power supply (B) is connected with the current induction switch (KI) in series and then is connected with the output end of the second solid-state relay (KW 2);
the current induction switch (KI) is used for detecting a current signal of the program-controlled direct-current power supply (B);
the controller (3) is further used for controlling the voltage output value of the program-controlled direct-current power supply (B) according to a preset voltage value, sending a switching signal to the input end of the second solid-state relay (KW 2) and controlling the switching state of the second solid-state relay (KW 2).
9. A multifunctional test circuit of a dc speed regulating switch according to claim 3, characterized in that the controller (3) is further adapted to control the resistance value of the load resistor (R2) according to a preset resistance value.
10. The multifunctional test circuit of a direct current speed regulating switch according to claim 2, characterized in that the controller (3) is connected with the output end of the first solid state relay (KW 1) for receiving the output level signal and generating the first detection result according to the output level signal.
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