CN203607179U - Resistor box - Google Patents
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- CN203607179U CN203607179U CN201320793934.6U CN201320793934U CN203607179U CN 203607179 U CN203607179 U CN 203607179U CN 201320793934 U CN201320793934 U CN 201320793934U CN 203607179 U CN203607179 U CN 203607179U
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Abstract
The utility model belongs to the technical field of resistor boxes, and provides a resistor box. The resistor box comprises a microphone, multiple fixed value resistor modules, a master control circuit, a display circuit and a voltage stabilizer, wherein the microphone is used for receiving resistance value setting audio signals sent by a user; the master control circuit is used for regulating resistance values in the multiple fixed value resistor modules according to the resistance value setting audio signals, detecting a voltage value of a connecting terminal of a second resistor via differential pressure, obtaining the resistance value corresponding to the voltage value and comparing the resistance value with the resistance values corresponding to the resistance value setting audio signals and outputting a state signal and a resistance value signal to the display circuit according to comparison results; and finally, the state information and the resistance value information are correspondingly displayed by the display circuit. Thus, the control for the resistor box via voice control is realized. Therefore, the high fault rate caused by the manual regulation for the resistance values is avoided. As a result, the resistance values are more convenient, rapider and more reliable to regulate.
Description
Technical field
The utility model belongs to resistance box technical field, relates in particular to a kind of resistance box.
Background technology
Resistance box is the assembly being composed in series by several fixed value resistances, several fixed value resistances are arranged in same casing (as shown in Figure 1), existing resistance box is adjusted its resistance by the resistance conversion equipment (as rotation adjustment device) being arranged on cabinet panel, as shown in Figure 2, the resistance of resistance box is in series by six fixed value resistance cohorts, each fixed value resistance cohort comprises 9 resistance that resistance is identical, and resistance conversion equipment is rotation adjusting button 10.If the number of resistance conversion equipment is more, show that the resistance value range of choice that resistance box can provide is larger, resistance accuracy also can be higher.But the number that increases resistance conversion equipment can make user's manual operation number of times increase and cause resistance to adjust error rate rising.Therefore, there is complex operation and cause resistance to adjust error rate rising in existing resistance box, and be unfavorable for the problem of fault detect.
Utility model content
The purpose of this utility model is to provide a kind of resistance box, be intended to solve the existing complex operation of existing resistance box and cause resistance adjust error rate rise problem.
The utility model is achieved in that a kind of resistance box, has casing and control panel, is provided with direct current input terminal, the first resistance splicing ear and the second resistance splicing ear on described control panel, and described resistance box also comprises:
Microphone, multiple fixed value resistance module, governor circuit, display circuit and pressurizer;
Described microphone, described multiple fixed value resistance modules, described governor circuit, described display circuit and described pressurizer are all built in described casing;
Described microphone is arranged at the phonetic incepting end of described control panel, and be connected with described governor circuit, described multiple fixed value resistance module head and the tail are connected in series between described the first resistance splicing ear and described the second resistance splicing ear successively, the power end of the each fixed value resistance module in described multiple fixed value resistance module connects described direct current input terminal, multiple resistance switching controls ends of described each fixed value resistance module connect respectively multiple resistances adjustable side of described governor circuit, the first resistance test side of described governor circuit is connected respectively described the first resistance splicing ear and described the second resistance splicing ear with the second resistance test side, the input of described pressurizer connects described direct current input terminal, the first power end of described governor circuit and the power end of described display circuit are connected to the output of described pressurizer altogether, the second source end of described governor circuit connects described direct current input terminal, described governor circuit also connects described display circuit, in the setting of demonstration module and described control panel of described display circuit.
The utility model comprises microphone by employing, multiple fixed value resistance modules, governor circuit, the resistance box of display circuit and pressurizer, receive by microphone the resistance setting audio signal that user sends, governor circuit is adjusted the resistance in multiple fixed value resistance modules according to this resistance setting audio signal, and governor circuit detects the magnitude of voltage of the second resistance splicing ear by dividing potential drop, and obtain the resistance value corresponding with this magnitude of voltage, and the resistance value that this resistance value is corresponding with resistance setting audio signal compares, and according to comparative result output status signal and resistance signal to display circuit, finally by correspondingly display status information and resistance information of display circuit, thereby reach by voice control and realized the control object to resistance box, the high error rate of having avoided manual adjustments resistance to bring, make resistance adjusting work become convenient, quick and reliable.
Accompanying drawing explanation
Fig. 1 is the control panel schematic diagram of existing resistance box mentioned in background technology;
Fig. 2 is the internal resistance structure chart of existing resistance box mentioned in background technology;
Fig. 3 is the schematic diagram of the resistance box that provides of the utility model embodiment;
Fig. 4 is the internal circuit modular structure figure of the resistance box that provides of the utility model embodiment;
Fig. 5 is the internal circuit example structure figure of the resistance box that provides of the utility model embodiment;
Fig. 6 is the control panel schematic diagram of the resistance box that provides of the utility model embodiment;
Fig. 7 is another control panel schematic diagram of the resistance box that provides of the utility model embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figure 3, it has casing 1 and control panel 2 to the resistance box that the utility model embodiment provides, and is provided with direct current input terminal 21, the first resistance splicing ear 22 and the second resistance splicing ear 23 on control panel 2; Direct current input terminal 21 is for accessing 12V direct current, the first resistance splicing ear 22 with the second resistance splicing ear 23 for being connected power consumption equipment.
As shown in Figure 4, resistance box also comprises microphone 100, multiple fixed value resistance module 200, governor circuit 300, display circuit 400 and pressurizer 500.Microphone 100, multiple fixed value resistance module 200, governor circuit 300, display circuit 400 and pressurizer 500 are all built in casing 1.
The phonetic incepting end 24(that microphone 100 is arranged at control panel 2 as shown in Figure 3), and be connected with governor circuit 300, multiple fixed value resistance module 200 head and the tail are connected in series between the first resistance splicing ear 22 and the second resistance splicing ear 23 successively, the power end of each fixed value resistance module 200 connects direct current input terminal 21, multiple resistance switching controls ends of each fixed value resistance module 200 connect respectively multiple resistances adjustable side of governor circuit 300, the first resistance test side of governor circuit 300 is connected respectively the first resistance splicing ear 22 and the second resistance splicing ear 23 with the second resistance test side, the input of pressurizer 500 connects direct current input terminal 21, the first power end of governor circuit 300 and the power end of display circuit 400 are connected to the output of pressurizer 500 altogether, the second source end of governor circuit 300 connects direct current input terminal 21, governor circuit 300 also connects display circuit 400, the demonstration module 401 of display circuit 400 is arranged at (as shown in Figure 3) on control panel 2.
On the control panel 2 of the resistance box shown in Fig. 3, show that module 401 is for showing " normally ", " fault " and " replacement " these three kinds of state informations and resistance information (comprising unit K Ω and M Ω), wherein, " normally " represents that the resistance setting audio signal that resistance box sends according to user is correctly provided with resistance, " fault " represents that resistance box internal circuit breaks down, " replacement " represents that the resistance of resistance box need to reset, and user can send resistance setting audio signal resistance is reset.
For the internal circuit configuration of the resistance box shown in Fig. 4, as shown in Figure 5, as the utility model one embodiment, the number of multiple fixed value resistance modules 200 can be 6, each fixed value resistance module 200 can comprise four resistance and four relays that resistance is incomplete same, and multiple fixed value resistance modules 200 are respectively the first fixed value resistance module 201, the second fixed value resistance module 202, the 3rd fixed value resistance module 203, the 4th fixed value resistance module 204, the 5th fixed value resistance module 205 and the 6th fixed value resistance module 206.
Wherein, the first fixed value resistance module 201 comprises:
The first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the first relay K 1, the second relay K 2, the 3rd relay K 3 and the 4th relay K 4;
The first end of the first resistance R 1 is connected with the first resistance splicing ear 22, the first end of the second resistance R 2 connects the second end of the first resistance R 1, the first end of the 3rd resistance R 3 connects the second end of the second resistance R 2, the first end of the 4th resistance R 4 connects the second end of the 3rd resistance R 3, the second end of the 4th resistance R 4 connects the second fixed value resistance module 202, first of the first relay K 1 is controlled first of contact 1 and the second relay K 2 and is controlled contact 1, the first control contact 1 that first of the 3rd relay K 3 is controlled contact 1 and the 4th relay K 4 is connected to direct current input terminal 21 altogether, second of the first relay K 1 is controlled second of contact 2 and the second relay K 2 and is controlled contact 2, the second control contact 2 of the second control contact 2 of the 3rd relay K 3 and the 4th relay K 4 forms four resistance switching controls ends of the first fixed value resistance module 201, the normally opened contact 4 of the first relay K 1 connects the first end of the first resistance R 1, the switch contact 3 of the first relay K 1 and the normally opened contact 4 of the second relay K 2 are connected to the second end of the first resistance R 1 altogether, the switch contact 3 of the second relay K 2 connects the second end of the second resistance R 2, the normally opened contact 4 of the 3rd relay K 3 connects the first end of the 3rd resistance R 3, the switch contact 3 of the 3rd relay K 3 and the normally opened contact 4 of the 4th relay K 4 are connected to the second end of the 3rd resistance R 3 altogether, the switch contact 3 of the 4th relay K 4 connects the second end of the 4th resistance R 4.
The second fixed value resistance module 202 comprises:
The 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7, the 8th resistance R 8, the 5th relay K 5, the 6th relay K 6, the 7th relay K 7 and the 8th relay K 8;
The first end of the 5th resistance R 5 is connected with the second end of the 4th resistance R 4, the first end of the 6th resistance R 6 connects the second end of the 5th resistance R 5, the first end of the 7th resistance R 7 connects the second end of the 6th resistance R 6, the first end of the 8th resistance R 8 connects the second end of the 7th resistance R 7, the second end of the 8th resistance R 8 connects the 3rd fixed value resistance module 203, first of the 5th relay K 5 is controlled first of contact 1 and the 6th relay K 6 and is controlled contact 1, the first control contact 1 that first of the 7th relay K 7 is controlled contact 1 and the 8th relay K 8 is connected to direct current input terminal 21 altogether, second of the 5th relay K 5 is controlled second of contact 2 and the 6th relay K 6 and is controlled contact 2, the second control contact 2 of the second control contact 2 of the 7th relay K 7 and the 8th relay K 8 forms four resistance switching controls ends of the second fixed value resistance module 202, the normally opened contact 4 of the 5th relay K 5 connects the first end of the 5th resistance R 5, the switch contact 3 of the 5th relay K 5 and the normally opened contact 4 of the 6th relay K 6 are connected to the second end of the 5th resistance R 5 altogether, the switch contact 3 of the 6th relay K 6 connects the second end of the 6th resistance R 6, the normally opened contact 4 of the 7th relay K 7 connects the first end of the 7th resistance R 7, the switch contact 3 of the 7th relay K 7 and the normally opened contact 4 of the 8th relay K 8 are connected to the second end of the 7th resistance R 7 altogether, the switch contact 3 of the 8th relay K 8 connects the second end of the 8th resistance R 8.
The 3rd fixed value resistance module 203 comprises:
The 9th resistance R 9, the tenth resistance R the 10, the 11 resistance R the 11, the 12 resistance R 12, the 9th relay K 9, the tenth relay K the 10, the 11 relay K the 11 and the 12 relay K 12;
The first end of the 9th resistance R 9 is connected with the second end of the 8th resistance R 8, the first end of the tenth resistance R 10 connects the second end of the 9th resistance R 9, the first end of the 11 resistance R 11 connects the second end of the tenth resistance R 10, the first end of the 12 resistance R 12 connects the second end of the 11 resistance R 11, the second end of the 12 resistance R 12 connects the 4th fixed value resistance module 204, first of the 9th relay K 9 is controlled first of contact 1 and the tenth relay K 10 and is controlled contact 1, the first control contact 1 that first of the 11 relay K 11 is controlled contact the 1 and the 12 relay K 12 is connected to direct current input terminal 21 altogether, second of the 9th relay K 9 is controlled second of contact 2 and the tenth relay K 10 and is controlled contact 2, the second control contact 2 of the second control contact the 2 and the 12 relay K 12 of the 11 relay K 11 forms four resistance switching controls ends of the 3rd fixed value resistance module 203, the normally opened contact 4 of the 9th relay K 9 connects the first end of the 9th resistance R 9, the switch contact 3 of the 9th relay K 9 and the normally opened contact 4 of the tenth relay K 10 are connected to the second end of the 9th resistance R 9 altogether, the switch contact 3 of the tenth relay K 10 connects the second end of the tenth resistance R 10, the normally opened contact 4 of the 11 relay K 11 connects the first end of the 11 resistance R 11, the switch contact 3 of the 11 relay K 11 and the normally opened contact 4 of the 12 relay K 12 are connected to the second end of the 11 resistance R 11 altogether, the switch contact 3 of the 12 relay K 12 connects the second end of the 12 resistance R 12.
The 4th fixed value resistance module 204 comprises:
The 13 resistance R the 13, the 14 resistance R the 14, the 15 resistance R the 15, the 16 resistance R the 16, the 13 relay K the 13, the 14 relay K the 14, the 15 relay K the 15 and the 16 relay K 16;
The first end of the 13 resistance R 13 is connected with the 5th fixed value resistance module 205, the first end of the 14 resistance R 14 connects the second end of the 13 resistance R 13, the first end of the 15 resistance R 15 connects the second end of the 14 resistance R 14, the first end of the 16 resistance R 16 connects the second end of the 15 resistance R 15, the second end of the 16 resistance R 16 connects the second end of the 12 resistance R 12, first of the 13 relay K 13 is controlled first of contact the 1 and the 14 relay K 14 and is controlled contact 1, the first control contact 1 that first of the 15 relay K 15 is controlled contact the 1 and the 16 relay K 16 is connected to direct current input terminal 21 altogether, second of the 13 relay K 13 is controlled second of contact the 2 and the 14 relay K 14 and is controlled contact 2, the second control contact 2 of the second control contact the 2 and the 16 relay K 16 of the 15 relay K 15 forms four resistance switching controls ends of the 4th fixed value resistance module 204, the normally opened contact 4 of the 13 relay K 13 connects the first end of the 13 resistance R 13, the switch contact 3 of the 13 relay K 13 and the normally opened contact 4 of the 14 relay K 14 are connected to the second end of the 13 resistance R 13 altogether, the switch contact 3 of the 14 relay K 14 connects the second end of the 14 resistance R 14, the normally opened contact 4 of the 15 relay K 15 connects the first end of the 15 resistance R 15, the switch contact 3 of the 15 relay K 15 and the normally opened contact 4 of the 16 relay K 16 are connected to the second end of the 15 resistance R 15 altogether, the switch contact 3 of the 16 relay K 16 connects the second end of the 16 resistance R 16.
The 5th fixed value resistance module 205 comprises:
The 17 resistance R the 17, the 18 resistance R the 18, the 19 resistance R the 19, the 20 resistance R the 20, the 17 relay K the 17, the 18 relay K the 18, the 19 relay K the 19 and the 20 relay K 20;
The first end of the 17 resistance R 17 is connected with the 6th fixed value resistance module 206, the first end of the 18 resistance R 18 connects the second end of the 17 resistance R 17, the first end of the 19 resistance R 19 connects the second end of the 18 resistance R 18, the first end of the 20 resistance R 20 connects the second end of the 19 resistance R 19, the second end of the 20 resistance R 20 connects the first end of the 13 resistance R 13, first of the 17 relay K 17 is controlled first of contact the 1 and the 18 relay K 18 and is controlled contact 1, the first control contact 1 that first of the 19 relay K 19 is controlled contact the 1 and the 16 relay K 16 is connected to direct current input terminal 21 altogether, second of the 17 relay K 17 is controlled second of contact the 2 and the 18 relay K 18 and is controlled contact 2, the second control contact 2 of the second control contact the 2 and the 20 relay K 20 of the 19 relay K 19 forms four resistance switching controls ends of the 5th fixed value resistance module 205, the normally opened contact 4 of the 17 relay K 17 connects the first end of the 17 resistance R 17, the switch contact 3 of the 17 relay K 17 and the normally opened contact 4 of the 18 relay K 18 are connected to the second end of the 17 resistance R 17 altogether, the switch contact 3 of the 18 relay K 18 connects the second end of the 18 resistance R 18, the normally opened contact 4 of the 19 relay K 19 connects the first end of the 19 resistance R 19, the switch contact 3 of the 19 relay K 19 and the normally opened contact 4 of the 20 relay K 20 are connected to the second end of the 19 resistance R 19 altogether, the switch contact 3 of the 20 relay K 20 connects the second end of the 20 resistance R 20.
The 6th fixed value resistance module 206 comprises:
The 21 resistance R the 21, the 22 resistance R the 22, the 23 resistance R the 23, the 24 resistance R the 24, the 21 relay K the 21, the 22 relay K the 22, the 23 relay K the 23 and the 24 relay K 24;
The first end of the 21 resistance R 21 is connected with the second resistance splicing ear 23, the first end of the 22 resistance R 22 connects the second end of the 21 resistance R 21, the first end of the 23 resistance R 23 connects the second end of the 22 resistance R 22, the first end of the 24 resistance R 24 connects the second end of the 23 resistance R 23, the second end of the 24 resistance R 24 connects the first end of the 17 resistance R 17, first of the 21 relay K 21 is controlled first of contact the 1 and the 22 relay K 22 and is controlled contact 1, the first control contact 1 that first of the 23 relay K 23 is controlled contact the 1 and the 24 relay K 24 is connected to direct current input terminal 21 altogether, second of the 21 relay K 21 is controlled second of contact the 2 and the 22 relay K 22 and is controlled contact 2, the second control contact 2 of the second control contact the 2 and the 24 relay K 24 of the 23 relay K 23 forms four resistance switching controls ends of the 6th fixed value resistance module 206, the normally opened contact 4 of the 21 relay K 21 connects the first end of the 21 resistance R 21, the switch contact 3 of the 21 relay K 21 and the normally opened contact 4 of the 22 relay K 22 are connected to the second end of the 21 resistance R 21 altogether, the switch contact 3 of the 22 relay K 22 connects the second end of the 22 resistance R 22, the normally opened contact 4 of the 23 relay K 23 connects the first end of the 23 resistance R 23, the switch contact 3 of the 23 relay K 23 and the normally opened contact 4 of the 24 relay K 24 are connected to the second end of the 23 resistance R 23 altogether, the switch contact 3 of the 24 relay K 24 connects the second end of the 24 resistance R 24.
As the utility model one embodiment, as shown in Figure 5, governor circuit 300 comprises:
The 25 relay K the 25, the 26 relay K 26, detection resistance R, the 27 relay K 27, microprocessor U1, the first step-up driver U2, the second step-up driver U3, the 3rd step-up driver U4, the 4th step-up driver U5, the 5th step-up driver U6, the 6th step-up driver U7 and the 7th step-up driver U8;
The supply pin VCC of microprocessor U1 is the first power end of governor circuit 300, first of the 25 relay K 25 is controlled first of contact the 1 and the 26 relay K 26 and is controlled contact 1, first of the 27 relay K 27 is controlled contact 1 and switch contact 3, the supply pin VDD of the first step-up driver U2, the supply pin VDD of the second step-up driver U3, the supply pin VDD of the 3rd step-up driver U4, the supply pin VDD of the 4th step-up driver U5, the supply pin VDD of the 5th step-up driver U6, the supply pin VDD of the supply pin VDD of the 6th step-up driver U7 and the 7th step-up driver U8 connects the second source end of formed common contact as governor circuit 300 altogether, normally opened contact 4 ground connection of the 25 relay K 25, the switch contact 3 of the 25 relay K 25 and the normally opened contact 4 of the 26 relay K 26 are respectively as the first resistance test side and the second resistance test side of governor circuit 300, detecting resistance R is connected between the switch contact 3 and the normally opened contact 4 of the 27 relay K 27 of the 26 relay K 26, the first input pin IN1 of the first step-up driver U2, the second input pin IN2 and the 3rd input pin IN3 connect respectively the first input/output port I/O0 of microprocessor U1, the second input/output port I/O1 and the 3rd input/output port I/O2, the first output pin OUT1 of the first step-up driver U2, the second output pin OUT2 and the 3rd output pin OUT3 connect respectively second of the 25 relay K 25 and control contact 2, second of the 26 relay K 26 is controlled second of contact the 2 and the 27 relay K 27 and is controlled contact 2, the analog-to-digital conversion mouth ADC of microprocessor U1 connects the normally opened contact 4 of the 26 relay K 26, the 4th input/output port I/O3 of microprocessor U1, the 5th input/output port I/O4, the 6th input/output port I/O5 and the 7th input/output port I/O6 connect respectively the first input pin IN1 of the second step-up driver U3, the second input pin IN2, the 3rd input pin IN3 and the 4th input pin IN4, the first output pin OUT1 of the second step-up driver U3, the second output pin OUT2, the 3rd output pin OUT3 and the 4th output pin OUT4 connect respectively four resistance switching controls ends of the first fixed value resistance module 201 correspondingly, the analog-to-digital conversion mouth ADC of microprocessor U1 connects the normally opened contact 4 of the 26 relay K 26, the 8th input/output port I/O7 of microprocessor U1, the 9th input/output port I/O8, the tenth input/output port I/O9 and the 11 input/output port I/O10 connect respectively the first input pin IN1 of the 3rd step-up driver U4, the second input pin IN2, the 3rd input pin IN3 and the 4th input pin IN4, the first output pin OUT1 of the 3rd step-up driver U4, the second output pin OUT2, the 3rd output pin OUT3 and the 4th output pin OUT4 connect respectively four resistance switching controls ends of the second fixed value resistance module 202 correspondingly, the 12 input/output port I/O11 of microprocessor U1, the 13 input/output port I/O12, the 14 input/output port I/O13 and the 15 input/output port I/O14 connect respectively the first input pin IN1 of the 4th step-up driver U5, the second input pin IN2, the 3rd input pin IN3 and the 4th input pin IN4, the first output pin OUT1 of the 4th step-up driver U5, the second output pin OUT2, the 3rd output pin OUT3 and the 4th output pin OUT4 connect respectively four resistance switching controls ends of the 3rd fixed value resistance module 203 correspondingly, the 16 input/output port I/O15 of microprocessor U1, the 17 input/output port I/O16, the 18 input/output port I/O17 and the 19 input/output port I/O18 connect respectively the first input pin IN1 of the 5th step-up driver U6, the second input pin IN2, the 3rd input pin IN3 and the 4th input pin IN4, the first output pin OUT1 of the 5th step-up driver U6, the second output pin OUT2, the 3rd output pin OUT3 and the 4th output pin OUT4 connect respectively four resistance switching controls ends of the 4th fixed value resistance module 204 correspondingly, the 20 input/output port I/O19 of microprocessor U1, the 21 input/output port I/O20, the 22 input/output port I/O21 and the 23 input/output port I/O22 connect respectively the first input pin IN1 of the 6th step-up driver U7, the second input pin IN2, the 3rd input pin IN3 and the 4th input pin IN4, the first output pin OUT1 of the 6th step-up driver U7, the second output pin OUT2, the 3rd output pin OUT3 and the 4th output pin OUT4 connect respectively four resistance switching controls ends of the 5th fixed value resistance module 205 correspondingly, the 24 input/output port I/O23 of microprocessor U1, the 25 input/output port I/O24, the 26 input/output port I/O25 and the 27 input/output port I/O26 connect respectively the first input pin IN1 of the 7th step-up driver U8, the second input pin IN2, the 3rd input pin IN3 and the 4th input pin IN4, the first output pin OUT1 of the 7th step-up driver U8, the second output pin OUT2, the 3rd output pin OUT3 and the 4th output pin OUT4 connect respectively four resistance switching controls ends of the 6th fixed value resistance module 206 correspondingly, the 28 input/output port I/O27 of microprocessor U1 is connected display circuit 400 with 29 input/output port I/O28, the 30 input/output port I/O29 of microprocessor U1 connects microphone 100.Wherein, microprocessor U1 can be the Programmable Logic Controller that single-chip microcomputer, arm processor or other possess mathematical logic processing capacity; The first step-up driver U2, the second step-up driver U3, the 3rd step-up driver U4, the 4th step-up driver U5, the 5th step-up driver U6, the 6th step-up driver U7 and the 7th step-up driver U8 can be all that model is the darlington transistor array chip of ULN2003, be used for increasing driving force, and then make disconnection that control signal that microprocessor U1 exports can control relay with closed.
As the utility model one embodiment, display circuit 400 can be to comprise LCD display or comprise charactron and the display circuit of light-emitting diode, wherein, shows that module 401 can be LCD display, or the combinational circuit of charactron and light-emitting diode.In the time showing that module 401 is LCD display, as shown in Figure 6, state information and resistance information show by LCD display the control panel 2 of resistance box; When showing that module 401 is while comprising the combination demonstration module of charactron and LED, as shown in Figure 7, " normally ", " fault " and " replacement " in state information are pointed out in the mode of lighting by the light-emitting diode of different colours respectively, as " normally ", " fault " and " replacement " are respectively green, red and yellow, resistance information is shown resistance by multiple charactrons.
As the utility model one embodiment, pressurizer 500 can be specifically that model is 7805 voltage stabilizing chip, and its 12V direct current that direct current input terminal 21 can be accessed is converted to 5V direct current, to realize, microprocessor U1 and display circuit 400 is carried out to normal power supply.
Below in conjunction with operation principle, above-mentioned resistance box is described further:
Suppose the first resistance R 1 in the first fixed value resistance module 201, the second resistance R 2, the resistance of the 3rd resistance R 3 and the 4th resistance R 4 is respectively 0.1 Ω, 0.2 Ω, 0.2 Ω and 0.5 Ω, the 5th resistance R 5 in the second fixed value resistance module 202, the 6th resistance R 6, the resistance of the 7th resistance R 7 and the 8th resistance R 8 is respectively 1 Ω, 2 Ω, 2 Ω and 5 Ω, the 9th resistance R 9 in the 3rd fixed value resistance module 203, the tenth resistance R 10, the resistance of the 11 resistance R 11 and the 12 resistance R 12 is respectively 10 Ω, 20 Ω, 20 Ω and 50 Ω, the 13 resistance R 13 in the 4th fixed value resistance module 204, the 14 resistance R 14, the resistance of the 15 resistance R 15 and the 16 resistance R 16 is respectively 100 Ω, 200 Ω, 200 Ω and 500 Ω, the 17 resistance R 17 in the 5th fixed value resistance module 205, the 18 resistance R 18, the resistance of the 19 resistance R 19 and the 20 resistance R 20 is respectively 1K Ω, 2K Ω, 2K Ω and 5K Ω, the 21 resistance R 21 in the 6th fixed value resistance module 206, the 22 resistance R 22, the resistance of the 23 resistance R 23 and the 24 resistance R 24 is respectively 10K Ω, 20K Ω, 20K Ω and 50K Ω, if the resistance setting audio signal that user sends resistance box is that need to set resistance be 12345.6 Ω, microphone 100 can receive this resistance setting audio signal and feed back to microprocessor U1, microprocessor U1 will be stored to its inner buffering area with the corresponding speech data of this resistance setting audio signal, from buffering area, extract again speech data, and therefrom analyze that to obtain resistance data be 12345.6, then carry out weighted code fractionation according to these resistance data, resistance 12345.6 Ω are split as to 1 (× 10K Ω)+2 (× 1K Ω)+3 (× 100 Ω)+4 (× 10 Ω)+5 (× 1 Ω)+6 (× 0.1 Ω), be that weighted code always has 6, be respectively 1, 2, 3, 4, 5 and 6, and for the relay in six fixed value resistance modules 201～206, in the time of relay closes, be connected in the switch contact 3 of relay and the resistance of normally opened contact 4 is effective, otherwise invalid, so the corresponding relation that according to above-mentioned weighted code, the relay in six fixed value resistance modules 201～206 is carried out to switch control for microprocessor U1 is as shown in the table:
As seen from the above table, need to obtain resistance 12345.6 Ω, microprocessor U1 need to control K1 disconnection, K2 closure, K3 closure and K4 disconnect obtaining 0.6 Ω, control K5 closure, K6 closure, K7 closure and K8 disconnect obtaining 5 Ω, control K9 closure, K10 disconnects, K11 disconnection and K12 closure are to obtain 40 Ω, controlling K13 disconnects, K14 disconnects, K15 closure and K16 closure are to obtain 300 Ω, control K17 closure, K18 disconnects, K19 closure and K20 closure are to obtain 2K Ω, and control K21 disconnects, K22 closure, K23 closure and K24 closure are to obtain 10K Ω, the above-mentioned resistance obtaining by control relay is added up to 0.6 Ω+300, Ω+40, Ω+5 Ω+2K Ω+10K Ω=12345.6 Ω, can obtain the needed resistance of user.At microprocessor U1, relay is carried out to switch control to obtain after above-mentioned resistance, its resistance of controlling K25, K26 and K27 closed pair resistance box detects, the magnitude of voltage obtaining after effective resistance in six fixed value resistance modules 201～206 and detection resistance R dividing potential drop is carried out to analog-to-digital conversion, thereby obtain corresponding resistance value, microprocessor U1 judges that whether this resistance value is consistent with corresponding resistance value in resistance setting audio signal, if, send " normally " state information and resistance information to display circuit 400, by showing that module 401 shows; If not, send " replacement " state information to display circuit, point out user again to send resistance setting audio signal so that resistance is reset by demonstration module 401.In addition, if microprocessor U1 detects that the circuit in resistance box breaks down in the time that resistance box power-up initializing or user send failure diagnosis voice signal, can send " fault " state information to display circuit 400, and by showing that module 401 sends corresponding fault prompting, be convenient to the state that user understands resistance box, and take in time maintenance measure, save user carries out fault detect time to resistance box.
In sum, the utility model comprises the resistance box of microphone, multiple fixed value resistance module, governor circuit, display circuit and pressurizer by employing, and the volume of whole resistance box has obtained significantly reducing in the situation that not needing resistance conversion equipment, receive by microphone the resistance setting audio signal that user sends, governor circuit is adjusted the resistance in multiple fixed value resistance modules according to this resistance setting audio signal, and governor circuit is detected the magnitude of voltage of the second resistance splicing ear and is obtained the resistance value corresponding with this magnitude of voltage by dividing potential drop, and the resistance value that this resistance value is corresponding with resistance setting audio signal compares, and according to comparative result output status signal and resistance signal to display circuit, finally by correspondingly display status information (i.e. " normally " or " replacement ") and resistance information of display circuit, thereby reach by voice control and realized the object that resistance box is carried out to resistance setting, the high error rate of having avoided manual adjustments resistance to bring, make resistance adjusting work become convenient, quick and reliable.In addition, resistance box can also carry out trouble shooting in the time of power-up initializing or when user sends failure diagnosis voice signal, and shows that by display circuit " fault " state information is to point out user to take in time maintenance measure in the time checking out that internal circuit breaks down.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection range of the present utility model.
Claims (10)
1. a resistance box, has casing and control panel, is provided with direct current input terminal, the first resistance splicing ear and the second resistance splicing ear on described control panel, it is characterized in that, described resistance box also comprises:
Microphone, multiple fixed value resistance module, governor circuit, display circuit and pressurizer;
Described microphone, described multiple fixed value resistance modules, described governor circuit, described display circuit and described pressurizer are all built in described casing;
Described microphone is arranged at the phonetic incepting end of described control panel, and be connected with described governor circuit, described multiple fixed value resistance module head and the tail are connected in series between described the first resistance splicing ear and described the second resistance splicing ear successively, the power end of the each fixed value resistance module in described multiple fixed value resistance module connects described direct current input terminal, multiple resistance switching controls ends of described each fixed value resistance module connect respectively multiple resistances adjustable side of described governor circuit, the first resistance test side of described governor circuit is connected respectively described the first resistance splicing ear and described the second resistance splicing ear with the second resistance test side, the input of described pressurizer connects described direct current input terminal, the first power end of described governor circuit and the power end of described display circuit are connected to the output of described pressurizer altogether, the second source end of described governor circuit connects described direct current input terminal, described governor circuit also connects described display circuit, in the setting of demonstration module and described control panel of described display circuit.
2. resistance box as claimed in claim 1, it is characterized in that, the number of described multiple fixed value resistance modules is 6, each fixed value resistance module comprises four resistance and four relays that resistance is incomplete same, and described multiple fixed value resistance modules are respectively the first fixed value resistance module, the second fixed value resistance module, the 3rd fixed value resistance module, the 4th fixed value resistance module, the 5th fixed value resistance module and the 6th fixed value resistance module.
3. resistance box as claimed in claim 2, is characterized in that, described the first fixed value resistance module comprises:
The first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the first relay, the second relay, the 3rd relay and the 4th relay;
The first end of described the first resistance R 1 is connected with described the first resistance splicing ear, the first end of described the second resistance R 2 connects the second end of described the first resistance R 1, the first end of described the 3rd resistance R 3 connects the second end of described the second resistance R 2, the first end of described the 4th resistance R 4 connects the second end of described the 3rd resistance R 3, the second end of described the 4th resistance R 4 connects described the second fixed value resistance module, first of described the first relay is controlled first of contact and described the second relay and is controlled contact, the first control contact that first of described the 3rd relay is controlled contact and described the 4th relay is connected to described direct current input terminal altogether, second of described the first relay is controlled second of contact and described the second relay and is controlled contact, the second control contact of the second control contact of described the 3rd relay and described the 4th relay forms four resistance switching controls ends of described the first fixed value resistance module, the normally opened contact of described the first relay connects the first end of described the first resistance R 1, the normally opened contact of the switch contact of described the first relay and described the second relay is connected to the second end of described the first resistance R 1 altogether, the switch contact of described the second relay connects the second end of described the second resistance R 2, the normally opened contact of described the 3rd relay connects the first end of described the 3rd resistance R 3, the normally opened contact of the switch contact of described the 3rd relay and described the 4th relay is connected to the second end of described the 3rd resistance R 3 altogether, the switch contact of described the 4th relay connects the second end of described the 4th resistance R 4.
4. resistance box as claimed in claim 3, is characterized in that, described the second fixed value resistance module comprises:
The 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7, the 8th resistance R 8, the 5th relay, the 6th relay, the 7th relay and the 8th relay;
The first end of described the 5th resistance R 5 is connected with the second end of described the 4th resistance R 4, the first end of described the 6th resistance R 6 connects the second end of described the 5th resistance R 5, the first end of described the 7th resistance R 7 connects the second end of described the 6th resistance R 6, the first end of described the 8th resistance R 8 connects the second end of described the 7th resistance R 7, the second end of described the 8th resistance R 8 connects described the 3rd fixed value resistance module, first of described the 5th relay is controlled first of contact and described the 6th relay and is controlled contact, the first control contact that first of described the 7th relay is controlled contact and described the 8th relay is connected to described direct current input terminal altogether, second of described the 5th relay is controlled second of contact and described the 6th relay and is controlled contact, the second control contact of the second control contact of described the 7th relay and described the 8th relay forms four resistance switching controls ends of described the second fixed value resistance module, the normally opened contact of described the 5th relay connects the first end of described the 5th resistance R 5, the normally opened contact of the switch contact of described the 5th relay and described the 6th relay is connected to the second end of described the 5th resistance R 5 altogether, the switch contact of described the 6th relay connects the second end of described the 6th resistance R 6, the normally opened contact of described the 7th relay connects the first end of described the 7th resistance R 7, the normally opened contact of the switch contact of described the 7th relay and described the 8th relay is connected to the second end of described the 7th resistance R 7 altogether, the switch contact of described the 8th relay connects the second end of described the 8th resistance R 8.
5. resistance box as claimed in claim 4, is characterized in that, described the 3rd fixed value resistance module comprises:
The 9th resistance R 9, the tenth resistance R the 10, the 11 resistance R the 11, the 12 resistance R 12, the 9th relay, the tenth relay, the 11 relay and the 12 relay;
The first end of described the 9th resistance R 9 is connected with the second end of described the 8th resistance R 8, the first end of described the tenth resistance R 10 connects the second end of described the 9th resistance R 9, the first end of described the 11 resistance R 11 connects the second end of described the tenth resistance R 10, the first end of described the 12 resistance R 12 connects the second end of described the 11 resistance R 11, the second end of described the 12 resistance R 12 connects described the 4th fixed value resistance module, first of described the 9th relay is controlled first of contact and described the tenth relay and is controlled contact, the first control contact that first of described the 11 relay is controlled contact and described the 12 relay is connected to described direct current input terminal altogether, second of described the 9th relay is controlled second of contact and described the tenth relay and is controlled contact, the second control contact of the second control contact of described the 11 relay and described the 12 relay forms four resistance switching controls ends of described the 3rd fixed value resistance module, the normally opened contact of described the 9th relay connects the first end of described the 9th resistance R 9, the normally opened contact of the switch contact of described the 9th relay and described the tenth relay is connected to the second end of described the 9th resistance R 9 altogether, the switch contact of described the tenth relay connects the second end of described the tenth resistance R 10, the normally opened contact of described the 11 relay connects the first end of described the 11 resistance R 11, described the 11 switch contact of relay and the normally opened contact of described the 12 relay are connected to the second end of described the 11 resistance R 11 altogether, the switch contact of described the 12 relay connects the second end of described the 12 resistance R 12.
6. resistance box as claimed in claim 5, is characterized in that, described the 4th fixed value resistance module comprises:
The 13 resistance R the 13, the 14 resistance R the 14, the 15 resistance R the 15, the 16 resistance R the 16, the 13 relay, the 14 relay, the 15 relay and the 16 relay;
The first end of described the 13 resistance R 13 is connected with described the 5th fixed value resistance module, the first end of described the 14 resistance R 14 connects the second end of described the 13 resistance R 13, the first end of described the 15 resistance R 15 connects the second end of described the 14 resistance R 14, the first end of described the 16 resistance R 16 connects the second end of described the 15 resistance R 15, the second end of described the 16 resistance R 16 connects the second end of described the 12 resistance R 12, first of described the 13 relay is controlled first of contact and described the 14 relay and is controlled contact, the first control contact that first of described the 15 relay is controlled contact and described the 16 relay is connected to described direct current input terminal altogether, second of described the 13 relay is controlled second of contact and described the 14 relay and is controlled contact, the second control contact of the second control contact of described the 15 relay and described the 16 relay forms four resistance switching controls ends of described the 4th fixed value resistance module, the normally opened contact of described the 13 relay connects the first end of described the 13 resistance R 13, described the 13 switch contact of relay and the normally opened contact of described the 14 relay are connected to the second end of described the 13 resistance R 13 altogether, the switch contact of described the 14 relay connects the second end of described the 14 resistance R 14, the normally opened contact of described the 15 relay connects the first end of described the 15 resistance R 15, described the 15 switch contact of relay and the normally opened contact of described the 16 relay are connected to the second end of described the 15 resistance R 15 altogether, the switch contact of described the 16 relay connects the second end of described the 16 resistance R 16.
7. resistance box as claimed in claim 6, is characterized in that, described the 5th fixed value resistance module comprises:
The 17 resistance R the 17, the 18 resistance R the 18, the 19 resistance R the 19, the 20 resistance R the 20, the 17 relay, the 18 relay, the 19 relay and the 20 relay;
The first end of described the 17 resistance R 17 is connected with described the 6th fixed value resistance module, the first end of described the 18 resistance R 18 connects the second end of described the 17 resistance R 17, the first end of described the 19 resistance R 19 connects the second end of described the 18 resistance R 18, the first end of described the 20 resistance R 20 connects the second end of described the 19 resistance R 19, the second end of described the 20 resistance R 20 connects the first end of described the 13 resistance R 13, first of described the 17 relay is controlled first of contact and described the 18 relay and is controlled contact, the first control contact that first of described the 19 relay is controlled contact and described the 16 relay is connected to described direct current input terminal altogether, second of described the 17 relay is controlled second of contact and described the 18 relay and is controlled contact, the second control contact of the second control contact of described the 19 relay and described the 20 relay forms four resistance switching controls ends of described the 5th fixed value resistance module, the normally opened contact of described the 17 relay connects the first end of described the 17 resistance R 17, described the 17 switch contact of relay and the normally opened contact of described the 18 relay are connected to the second end of described the 17 resistance R 17 altogether, the switch contact of described the 18 relay connects the second end of described the 18 resistance R 18, the normally opened contact of described the 19 relay connects the first end of described the 19 resistance R 19, described the 19 switch contact of relay and the normally opened contact of described the 20 relay are connected to the second end of described the 19 resistance R 19 altogether, the switch contact of described the 20 relay connects the second end of described the 20 resistance R 20.
8. resistance box as claimed in claim 7, is characterized in that, described the 6th fixed value resistance module comprises:
The 21 resistance R the 21, the 22 resistance R the 22, the 23 resistance R the 23, the 24 resistance R the 24, the 21 relay, the 22 relay, the 23 relay and the 24 relay;
The first end of described the 21 resistance R 21 is connected with described the second resistance splicing ear, the first end of described the 22 resistance R 22 connects the second end of described the 21 resistance R 21, the first end of described the 23 resistance R 23 connects the second end of described the 22 resistance R 22, the first end of described the 24 resistance R 24 connects the second end of described the 23 resistance R 23, the second end of described the 24 resistance R 24 connects the first end of described the 17 resistance R 17, first of described the 21 relay is controlled first of contact and described the 22 relay and is controlled contact, the first control contact that first of described the 23 relay is controlled contact and described the 24 relay is connected to described direct current input terminal altogether, second of described the 21 relay is controlled second of contact and described the 22 relay and is controlled contact, the second control contact of the second control contact of described the 23 relay and described the 24 relay forms four resistance switching controls ends of described the 6th fixed value resistance module, the normally opened contact of described the 21 relay connects the first end of described the 21 resistance R 21, described the 21 switch contact of relay and the normally opened contact of described the 22 relay are connected to the second end of described the 21 resistance R 21 altogether, the switch contact of described the 22 relay connects the second end of described the 22 resistance R 22, the normally opened contact of described the 23 relay connects the first end of described the 23 resistance R 23, described the 23 switch contact of relay and the normally opened contact of described the 24 relay are connected to the second end of described the 23 resistance R 23 altogether, the switch contact of described the 24 relay connects the second end of described the 24 resistance R 24.
9. resistance box as claimed in claim 2, is characterized in that, described governor circuit comprises:
The 25 relay, the 26 relay, detection resistance R, the 27 relay, microprocessor, the first step-up driver, the second step-up driver, the 3rd step-up driver, the 4th step-up driver, the 5th step-up driver, the 6th step-up driver and the 7th step-up driver;
The supply pin of described microprocessor is the first power end of described governor circuit, first of described the 25 relay is controlled first of contact and described the 26 relay and is controlled contact, first of described the 27 relay is controlled contact and switch contact, the supply pin of described the first step-up driver, the supply pin of described the second step-up driver, the supply pin of described the 3rd step-up driver, the supply pin of described the 4th step-up driver, the supply pin of described the 5th step-up driver, the supply pin of the supply pin of described the 6th step-up driver and described the 7th step-up driver connects the second source end of formed common contact as described governor circuit altogether, the normally opened contact ground connection of described the 25 relay, described the 25 switch contact of relay and the normally opened contact of described the 26 relay are respectively as the first resistance test side and the second resistance test side of described governor circuit, described detection resistance R is connected between described the 26 switch contact of relay and the normally opened contact of described the 27 relay, the first input pin of described the first step-up driver, the second input pin and the 3rd input pin connect respectively the first input/output port of described microprocessor, the second input/output port and the 3rd input/output port, the first output pin of described the first step-up driver, the second output pin and the 3rd output pin connect respectively second of described the 25 relay and control contact, second of described the 26 relay is controlled second of contact and described the 27 relay and is controlled contact, the analog-to-digital conversion mouth of described microprocessor connects the normally opened contact of described the 26 relay, the 4th input/output port of described microprocessor, the 5th input/output port, the 6th input/output port and the 7th input/output port connect respectively the first input pin of described the second step-up driver, the second input pin, the 3rd input pin and the 4th input pin, the first output pin of described the second step-up driver, the second output pin, the 3rd output pin and the 4th output pin connect respectively four resistance switching controls ends of described the first fixed value resistance module correspondingly, the analog-to-digital conversion mouth of described microprocessor connects the normally opened contact of described the 26 relay, the 8th input/output port of described microprocessor, the 9th input/output port, the tenth input/output port and the 11 input/output port connect respectively the first input pin of described the 3rd step-up driver, the second input pin, the 3rd input pin and the 4th input pin, the first output pin of described the 3rd step-up driver, the second output pin, the 3rd output pin and the 4th output pin connect respectively four resistance switching controls ends of described the second fixed value resistance module correspondingly, the 12 input/output port of described microprocessor, the 13 input/output port, the 14 input/output port and the 15 input/output port connect respectively the first input pin of described the 4th step-up driver, the second input pin, the 3rd input pin and the 4th input pin, the first output pin of described the 4th step-up driver, the second output pin, the 3rd output pin and the 4th output pin connect respectively four resistance switching controls ends of described the 3rd fixed value resistance module correspondingly, the 16 input/output port of described microprocessor, the 17 input/output port, the 18 input/output port and the 19 input/output port connect respectively the first input pin of described the 5th step-up driver, the second input pin, the 3rd input pin and the 4th input pin, the first output pin of described the 5th step-up driver, the second output pin, the 3rd output pin and the 4th output pin connect respectively four resistance switching controls ends of described the 4th fixed value resistance module correspondingly, the 20 input/output port of described microprocessor, the 21 input/output port, the 22 input/output port and the 23 input/output port connect respectively the first input pin of described the 6th step-up driver, the second input pin, the 3rd input pin and the 4th input pin, the first output pin of described the 6th step-up driver, the second output pin, the 3rd output pin and the 4th output pin connect respectively four resistance switching controls ends of described the 5th fixed value resistance module correspondingly, the 24 input/output port of described microprocessor, the 25 input/output port, the 26 input/output port and the 27 input/output port connect respectively the first input pin of described the 7th step-up driver, the second input pin, the 3rd input pin and the 4th input pin, the first output pin of described the 7th step-up driver, the second output pin, the 3rd output pin and the 4th output pin connect respectively four resistance switching controls ends of described the 6th fixed value resistance module correspondingly, the 28 input/output port of described microprocessor is connected described display circuit with 29 input/output ports, the 30 input/output port of described microprocessor connects described microphone.
10. resistance box as claimed in claim 1, is characterized in that, described demonstration module is LCD display, or comprises that the combination of charactron and light-emitting diode shows module.
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| CN201320793934.6U CN203607179U (en) | 2013-12-04 | 2013-12-04 | Resistor box |
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| CN201320793934.6U CN203607179U (en) | 2013-12-04 | 2013-12-04 | Resistor box |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105006321A (en) * | 2015-07-30 | 2015-10-28 | 成都中微电微波技术有限公司 | Potentiometer controlled through voice |
| CN105006320A (en) * | 2015-07-30 | 2015-10-28 | 成都中微电微波技术有限公司 | Potentiometer with clamping electric brush |
| CN105006322A (en) * | 2015-07-30 | 2015-10-28 | 成都中微电微波技术有限公司 | Voice control potentiometer provided with clamping electric brush and capable of being adjusted reversely |
| CN105023672A (en) * | 2015-07-30 | 2015-11-04 | 成都中微电微波技术有限公司 | Rolling potentiometer |
| CN105070440A (en) * | 2015-07-30 | 2015-11-18 | 成都中微电微波技术有限公司 | Voice-controlled potentiometer with reverse-adjustment gradations |
| CN105070435A (en) * | 2015-07-30 | 2015-11-18 | 成都中微电微波技术有限公司 | Tightly adjusted and controlled potentiometer |
| CN105139989A (en) * | 2015-07-30 | 2015-12-09 | 成都中微电微波技术有限公司 | Voice-controlled potentiometer with reverse adjustment function |
| CN105304047A (en) * | 2015-11-19 | 2016-02-03 | 深圳市华星光电技术有限公司 | Protection circuit and liquid crystal display with the same |
| CN112002508A (en) * | 2020-08-25 | 2020-11-27 | 广州赛宝计量检测中心服务有限公司 | Resistance box |
| CN113504466A (en) * | 2021-07-21 | 2021-10-15 | 上海外高桥造船有限公司 | Detection equipment and detection method for relay |
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- 2013-12-04 CN CN201320793934.6U patent/CN203607179U/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105006321A (en) * | 2015-07-30 | 2015-10-28 | 成都中微电微波技术有限公司 | Potentiometer controlled through voice |
| CN105006320A (en) * | 2015-07-30 | 2015-10-28 | 成都中微电微波技术有限公司 | Potentiometer with clamping electric brush |
| CN105006322A (en) * | 2015-07-30 | 2015-10-28 | 成都中微电微波技术有限公司 | Voice control potentiometer provided with clamping electric brush and capable of being adjusted reversely |
| CN105023672A (en) * | 2015-07-30 | 2015-11-04 | 成都中微电微波技术有限公司 | Rolling potentiometer |
| CN105070440A (en) * | 2015-07-30 | 2015-11-18 | 成都中微电微波技术有限公司 | Voice-controlled potentiometer with reverse-adjustment gradations |
| CN105070435A (en) * | 2015-07-30 | 2015-11-18 | 成都中微电微波技术有限公司 | Tightly adjusted and controlled potentiometer |
| CN105139989A (en) * | 2015-07-30 | 2015-12-09 | 成都中微电微波技术有限公司 | Voice-controlled potentiometer with reverse adjustment function |
| CN105304047A (en) * | 2015-11-19 | 2016-02-03 | 深圳市华星光电技术有限公司 | Protection circuit and liquid crystal display with the same |
| CN105304047B (en) * | 2015-11-19 | 2018-07-03 | 深圳市华星光电技术有限公司 | Protect circuit and the liquid crystal display with the protection circuit |
| CN112002508A (en) * | 2020-08-25 | 2020-11-27 | 广州赛宝计量检测中心服务有限公司 | Resistance box |
| CN113504466A (en) * | 2021-07-21 | 2021-10-15 | 上海外高桥造船有限公司 | Detection equipment and detection method for relay |
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