CN109119220A - A kind of resistance box and its application method - Google Patents
A kind of resistance box and its application method Download PDFInfo
- Publication number
- CN109119220A CN109119220A CN201811063628.0A CN201811063628A CN109119220A CN 109119220 A CN109119220 A CN 109119220A CN 201811063628 A CN201811063628 A CN 201811063628A CN 109119220 A CN109119220 A CN 109119220A
- Authority
- CN
- China
- Prior art keywords
- resistance
- resistance value
- controller
- logic
- box
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C13/00—Resistors not provided for elsewhere
- H01C13/02—Structural combinations of resistors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/16—Resistor networks not otherwise provided for
Abstract
The present invention provides a kind of resistance box and its application method, which includes: electric resistance array, switch arrays, controller, resistance value input module and two leading-out terminals；The both ends of electric resistance array are connected with two leading-out terminals, and controller is connected with switch arrays and resistance value input module respectively；Electric resistance array includes at least one resistance group, is serially connected between different resistance groups, each resistance group includes at least two logic resistance being serially connected, each logic resistance is made of at least one measuring resistance element；Switch arrays include at least two switching devices, each logic resistance is in parallel with a switching device；Controller, the first object resistance value for being inputted according to user by resistance value input module, controls the closed state of each switching device, so that the resistance value between two leading-out terminals is equal to first object resistance value.This programme can be avoided the resistance that nonstandard device is used in resistance box.
Description
Technical field
The present invention relates to electronic engineering technical field, in particular to a kind of resistance box and its application method.
Background technique
Resistance box is a kind of variable resistance utensil for changing its resistance value using converting means, is widely used in circuit tune
In examination and test.Include multiple resistance by suitably connecting in resistance box, can change resistance using multidigit rotary switch
Between connection relationship, to form required resistance value between the two of resistance box leading-out terminal.
Currently, it is different according to the specification of resistance box, it is provided with the resistance of multiple and different resistance values in resistance box, is revolved by multidigit
Different resistance can be connected between two leading-out terminals of resistance box by button switch, with resistance value needed for obtaining user.
For current resistance box, when the resistance value of needs is more, need that multiple and different resistance values are arranged in resistance box
Resistance, but only having minority in required resistance value is standard electric resistance value, therefore includes in resistance used in existing resistance box
Greater number of nonstandard device.For example, needing resistance value is respectively 1 Ω, 2 Ω, 3 when needing this 10 kinds of integer resistance values of 0-9 Ω
This 9 resistance of Ω, 4 Ω, 5 Ω, 6 Ω, 7 Ω, 8 Ω and 9 Ω, remaining 7 resistance in addition to 1 Ω and 2 Ω are nonstandard device.
Since the resistance of nonstandard device needs to customize, cause to draw materials in resistance box manufacturing process relatively difficult.
Summary of the invention
The embodiment of the invention provides resistance box and its application method, the resistance using nonstandard device can be avoided.
In a first aspect, the embodiment of the invention provides a kind of resistance boxes, comprising: electric resistance array, switch arrays, controller,
Resistance value input module and two leading-out terminals；
The both ends of the electric resistance array are connected with described two leading-out terminals, the controller respectively with the switch arrays
Column are connected with the resistance value input module；
The electric resistance array includes at least one resistance group, is serially connected between the different resistance groups, each institute
Stating resistance group includes at least two logic resistance being serially connected, each described logic resistance is by least one measuring resistance
Element composition；
The switch arrays include at least two switching devices, each described logic resistance and a derailing switch
Part is in parallel；
The controller, the first object resistance value for being inputted according to user by the resistance value input module, control
The closed state of each switching device, so that the resistance value between described two leading-out terminals is equal to the first object resistance
Value.
Optionally,
Each described resistance group includes 4 logic resistance being serially connected；
The resistance value of 4 logic resistance is respectively 1N ohm, 2N ohm, 4N ohm and 8N ohm, alternatively, described in 4
The resistance value of logic resistance is respectively 1N ohm, 1N ohm, 2N ohm and 5N ohm, wherein N is equal to 10n, n is integer.
Optionally,
When the number for the resistance group that the electric resistance array includes is not less than 2, described in each resistance group
The corresponding N value of the resistance value of logic resistance is increased continuously.
Optionally,
The resistance value input module includes: any one or more in button, keyboard and rotary coding switch.
Optionally,
The switching device includes: mechanical relay, photoelectric relay or analog switch chip.
Optionally,
The resistance box further comprises: display screen；
The display screen is connected with the controller；
The controller is further used in get that the user inputted by the resistance value input module described
After one target resistance values, the first object resistance value is shown by the display screen.
Optionally,
The resistance box further comprises: communication interface；
The communication interface is connected with the controller；
The communication interface can be connected with external computer, the second target electricity for sending the computer
Resistance value is transferred to the controller；
The controller is further used for controlling the closure of each switching device according to second target resistance values
State, so that the resistance value between described two leading-out terminals is equal to second target resistance values.
Optionally,
The resistance box further comprises: power supply；
The power supply, for powering for the switch arrays, the controller and the resistance value input module, wherein institute
Stating power supply includes dry cell or rechargeable battery.
Second aspect, the embodiment of the invention also provides a kind of first aspects to provide the application method of any resistance box,
Include:
The first object resistance value of user's input is obtained using the resistance value input module；
Using the controller, each switch for including to the switch arrays according to the first object resistance value
The closed state of device is controlled, so that the resistance value between described two leading-out terminals is equal to the first object resistance value.
Optionally, when the resistance box includes the display screen,
After the first object resistance value for obtaining user's input using the resistance value input module, further wrap
It includes:
The first object resistance value is shown by the display screen.
Resistance box provided in an embodiment of the present invention and its application method, electric resistance array include one or more resistance groups,
It is serially connected between different resistance groups, each resistance group includes the multiple logic resistance being serially connected, each logic electricity
Resistance is in parallel with a switching device in switch arrays, controller can be inputted according to user by resistance value input module the
One target resistance values control the closed state of each switching device, and the logic resistance of corresponding number is accessed two leading-out terminals
Between circuit so that resistance value between two leading-out terminals is equal to first object resistance value.Since each logic resistance is logical
It crosses a measuring resistance element to realize, or is realized by multiple measuring resistance elements in series or in parallel with each other, so as to
The resistance for using nonstandard device in resistance box is avoided, guarantees the convenience drawn materials in resistance box manufacturing process.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is a kind of schematic diagram of resistance box provided by one embodiment of the present invention；
Fig. 2 is the schematic diagram of another resistance box provided by one embodiment of the present invention；
Fig. 3 is the schematic diagram of another resistance box provided by one embodiment of the present invention；
Fig. 4 is a kind of flow chart of resistance box application method provided by one embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments, based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
As shown in Figure 1, the resistance box may include: electric resistance array 10, open the embodiment of the invention provides a kind of resistance box
Close array 20, controller 30, resistance value input module 40 and two leading-out terminals 50；
The both ends of electric resistance array 10 are connected with two leading-out terminals 50 respectively, controller 30 respectively with switch arrays 20 and
Resistance value input module 40 is connected；
Electric resistance array 10 includes at least one resistance group 11, is serially connected between different resistance groups 11, each resistance
Group 11 includes at least two logic resistance 12 being serially connected, each logic resistance 12 is by least one measuring resistance element
Composition；
Switch arrays 20 include at least two switching devices 21, each logic resistance 12 and 21 phase of switching device
It is in parallel；
Controller 30 is used to pass through the first object resistance value that resistance value input module 40 inputs according to user, controls each open
The closed state of device 21 is closed, so that the resistance value between two leading-out terminals 50 is equal to first object resistance value.
The embodiment of the invention provides a kind of resistance box, electric resistance array includes one or more resistance groups, different resistance
It is serially connected between group, each resistance group includes the multiple logic resistance being serially connected, each logic resistance and switch
A switching device in array is in parallel, the first object electricity that controller can be inputted according to user by resistance value input module
Resistance value controls the closed state of each switching device, and the logic resistance of corresponding number is accessed the electricity between two leading-out terminals
Road, so that the resistance value between two leading-out terminals is equal to first object resistance value.Since each logic resistance passes through a mark
Quasi- resistive element is realized, or is realized by multiple measuring resistance elements in series or in parallel with each other, so as to avoid in electricity
The resistance for using nonstandard device in case is hindered, guarantees the convenience drawn materials in resistance box manufacturing process.
Optionally, on the basis of resistance box shown in Fig. 1, each resistance group 11 may include that 4 be serially connected patrol
Collect resistance 12.The resistance value for the 4 logic resistance 12 that same resistance group 11 includes can be respectively 1N ohm, 2N ohm, 4N ohm
Resistance value with 8N ohm or 4 logic resistance 12 can also be respectively 1N ohm, 1N ohm, 2N ohm and 5N ohm,
In, N is equal to 10n, n is integer.
The resistance value of 4 logic resistance included by same resistance group can be according to 8421 form value, can also be according to
5211 form value, i.e., the ratio between resistance value of 4 logic resistance that same resistance group includes be equal to 8: 4: 2: 1 or 5: 2: 1: 1, and
The greatest common divisor of 4 logic resistance is equal to 10n, n is integer.In this way, be directed to the same resistance group, by control respectively with this
The closed state for 4 switching devices that 4 logic resistance are in parallel in resistance group, can make the resistance group resistance value be equal to 0N,
Any one in 1N, 2N, 3N, 4N, 5N, 6N, 7N, 8N and 9N, can be drawn by a resistance group in two of resistance box
It is formed between terminal using 1N as multiple resistance values at interval out.
For example, the resistance value of 4 logic resistance being serially connected is respectively 8 Ω, 4 Ω, 2 Ω and 1 Ω in a resistance group.When
When the switching device being in parallel with 4 logic resistance is closed, 4 logic resistance are short-circuited, the resistance group to external resistance
Equal to 0 Ω；When the switching device being in parallel with 1 Ω logic resistance disconnects and its excess-three switching device is closed, the resistance group
To external resistance be equal to 1 Ω；When the switching device being in parallel with 1 Ω logic resistance and the switch being in parallel with 2 Ω logic resistance
Device disconnects, and the switching device being in parallel with 4 Ω logic resistance and the switching device being in parallel with 8 Ω logic resistance are closed
When, which is equal to 3 Ω to external resistance.It can be seen that passing through the group of 4 switching device off-states and closed state
It closes, the external resistance value of the resistance group can be made to be equal to 0-9 Ω and is divided into any resistance value of 1 Ω.
In the above example, the logic resistance of 8 Ω can pass through the measuring resistance element of 3.3 Ω and the standard electric of 4.7 Ω
Resistance element connects to obtain, and the logic resistance of 4 Ω can connect to obtain by the measuring resistance element of two 2 Ω.3.3Ω,4.7
The resistance of Ω, 2 Ω and 1 Ω are the resistance for meeting E24 series standard resistance value, directly can commercially be obtained, nothing
It needs to customize.
4 logic resistance value in the way of 8421 or 5211 in resistance group, only by 4 logic resistance can so that
Resistance group forms external resistance value equal to 0-9N and is divided into any resistance value of 1N, by small number of logic resistance can so that
Resistance box generates a variety of different resistance values, can reduce resistance under the premise of resistance measurement produced by resistance box and identical range
The quantity of resistance in case so as to reduce the complexity of resistance box structure, and reduces the cost of resistance box.
It should be noted that in resistance group logic resistance according to 8421 or 5211 value mode carry out value, be in order to
Each logic resistance is more easily formed by measuring resistance element, and resistance box can be made to generate the resistance values of multiple quantity.
Certainly, the logic resistance in resistance group can also carry out value, such as the values sides such as 7421,521 according to other value modes
Formula carries out value.
It optionally, include the embodiment for 4 logic resistance being serially connected based on above-mentioned each resistance group, when in resistance box
When the number of resistance group 11 included by electric resistance array 10 is greater than or equal to 2, the resistance value of logic resistance 12 in each resistance group 11
Corresponding N value is increased continuously.
In the same resistance group 11, the resistance value of 4 logic resistance is respectively 1N ohm, 2N ohm, 4N ohm and the Europe 8N
The resistance value of nurse or 4 logic resistance is respectively 1N ohm, 1N ohm, 2N ohm and 5N ohm, and wherein N is equal to 10n, n is whole
Number.When electric resistance array 10 includes multiple resistance groups 11, make the corresponding N value of the resistance value of logic resistance 12 in each resistance group 11
It is increased continuously, such resistance box can produce the 10 of alternate constant valuemmA resistance value, wherein m is the number of resistance group, so that resistance
Case can continuously generate multiple resistance values to meet different usage scenarios, promote the applicability of resistance box.
For example, electric resistance array includes 2 resistance groups, wherein the resistance value of 4 logic resistance is respectively in first resistance group
0.8 Ω, 0.4 Ω, 0.2 Ω and 0.1 Ω, the resistance value of 4 logic resistance is respectively 8 Ω, 4 Ω, 2 Ω and 1 in second resistor group
Ω, resistance box can produce 0-9.9 Ω at this time, and be divided into 0.1 Ω amounts to 100 resistance values.
In another example electric resistance array includes 3 resistance groups, wherein the resistance value difference of 4 logic resistance in first resistance group
For 5 Ω, 2 Ω, 1 Ω and 1 Ω, the resistance value of 4 logic resistance is respectively 50 Ω, 20 Ω, 10 Ω and 10 Ω in second resistor group,
The resistance value of 4 logic resistance is respectively 500 Ω, 200 Ω, 100 Ω and 100 Ω in third resistance group, and resistance box can be at this time
0-999 Ω is generated, be divided into 1 Ω amounts to 1000 resistance values.
Optionally, on the basis of resistance box shown in Fig. 1, resistance value input module 40 may include button, keyboard and rotation
One or more of code switch.
Resistance value input module 40 is used for for user's operation, is sent corresponding control to controller 30 depending on the user's operation and is referred to
It enables, so that closed state of the controller 30 according to switching device 21 each in control instruction control switch array 20, realizes and adjust
Resistance value between two leading-out terminals 50.Resistance value input module 40 can be button, keyboard or rotary coding switch, specifically
One or more of them can be selected for user's operation according to the layout and usage scenario of resistance box, so as to meet difference
The individual demand of user promotes satisfaction when user uses resistance box.
Optionally, on the basis of resistance box shown in Fig. 1, switching device 21 can be mechanical relay in switch arrays 20
Device, photoelectric relay or analog switch chip,
By mechanical relay, photoelectric relay or analog switch chip as switching device and logic resistance mutually simultaneously
Connection, can make control terminal and controlled terminal electrical isolation, therefore control circuit is minimum to interference caused by electric resistance array, ensure that
The accuracy of the provided resistance of resistance box.
In addition, contact oxidation and mill is not present when choosing uses photoelectric relay or analog switch chip as switching device
The problem of damage so that resistance box has longer service life, and may be implemented quickly, continually convert resistance value, into one
Step improves the applicability of the resistance box.
Optionally, on the basis of resistance box shown in Fig. 1, as shown in Fig. 2, the resistance box can also include display screen 60,
Display screen 60 is connected with controller 30, and controller 30 passes through the first object of the input of resistance value input module 40 getting user
After resistance value, first object resistance value can be shown by display screen 60.
By the way that the display screen being connected with controller is arranged, when user passes through resistance value needed for the input of resistance value input module
Afterwards, controller can be shown by the resistance value that display screen inputs user, so that user confirms its electricity inputted
Needed for whether resistance value is it, avoid user due to input resistance value mistake and not discovering causes the situation of test result mistake to be sent out
It is raw, the usage experience of user can be improved.
Optionally, on the basis of above-mentioned each embodiment provided resistance box, as shown in figure 3, the resistance box can be with
Including communication interface 70；
Communication interface 70 is connected with controller 30, and communication interface 70 can be connected with external computer, and being used for will
The second target resistance values that computer is sent are transferred to controller 30；
Controller 30, can be according to the second target electricity after receiving the second target resistance values that communication interface 30 is transmitted
The closed state of each switching device in resistance value control switch array 20, so that resistance value between two leading-out terminals 50 is equal to the
Two target resistance values.
By the way that the communication interface being connected with controller is arranged, computer can send electricity to controller by communication interface
Resistance value, so that controller is adjusted by the closed state of each switching device in control switch array between two leading-out terminals
Resistance value, so that user can set the resistance value of resistance box by computer, further improve user uses body
It tests, also makes it possible the resistance value of computer self adjusting resistance case.
Optionally, on the basis of above-mentioned each embodiment provided resistance box, which further comprises having power supply,
Power supply can be dry cell or rechargeable battery, and power supply is used for as switch arrays, controller and the power supply of resistance value input module.
It is switch arrays, controller and the power supply of resistance value input module by dry cell or rechargeable battery, without being resistance box
AC power source is set, so that resistance box easily facilitates carryings, can be applicable on site or use when field equipment maintenance, into one
Step improves the applicability of the resistance box.
Below with reference to Fig. 1 to resistance box shown in Fig. 3, three kinds of specific examples of resistance box are provided.
Example one:
Electric resistance array in the way of 8421, select 0.1 Ω, 0.2 Ω, 0.4 Ω, 0.8 Ω, 1.0 Ω, 2.0 Ω, 4.0 Ω,
8.0 Ω, until 100k Ω, 200k Ω, 400k Ω, 800k Ω amount to 7 resistance groups, 7 resistance groups are total 28 logic electricity
Resistance.Wherein, the logic resistance of 0.4 Ω connects to obtain with the measuring resistance element of two 0.2 Ω, and the logic resistance of 0.8 Ω is used
The measuring resistance element of 0.33 Ω and the measuring resistance element of 0.47 Ω connect to obtain, and so on.The resistance that the example provides
The available Ω of 0.1 Ω~999999.9 of case is spaced any resistance value of 0.1 Ω.
Switch arrays select 20 HFE9 type mechanical relays, and the conducting resistance of the mechanical relay is less than 1m Ω, has
Introduce the small feature of error.Since mechanical relay needs biggish driving current, another plus 4 ST companies ULN2003 type is driven
Dynamic device chip, every driver chip can drive 7 mechanical relays.
The STM32F030R8 type single-chip microcontroller of controller selection ST company.Display screen uses 320*240 type color TFT-LCD
Screen.Resistance value input module selects a 4*4 film numeric keypad, can be directly by resistance value needed for digital key input.Communication interface
The CP2102 type USB of Silicon Labs company is selected to turn serial port chip.Power supply using a 12V external power adapter and
The AMS1117-3.3 voltage stabilizing chip of AMS company is depressurized to 3.3V supply single-chip microcontroller, and ULN2003 driver chip then directly uses 12V
Power supply.
The resistance box volume that this example is realized is slightly larger, needs external power supply to use, but precision is very high, can connect with computer
It connects, realizes from any resistance value of computer settings.
Example two:
Electric resistance array selects 10 Ω, 10 Ω, 20 Ω, 50 Ω, 100 Ω, 100 Ω, 200 Ω, 500 in the way of 5211
Ω, until 10k Ω, 10k Ω, 20k Ω, 50k Ω amount to 4 resistance groups, 4 resistance groups are total 16 logic resistance.Wherein,
The logic resistance of 20 Ω connects to obtain with the measuring resistance element of two 10 Ω, the mark of two 100 Ω of logic resistance of 50 Ω
Quasi- resistive element parallel connection obtains, and so on.The available Ω of 10 Ω~99990 of resistance box that the example provides, is divided into 10
Any resistance value of Ω has only used 10 Ω, 100 Ω, 1k Ω, 10k Ω, 100k Ω totally five kinds of resistance.
Switch arrays select 16 Panasonic AQY282 type photoelectricity solid-state relays, and advantage is that conducting resistance is smaller (1 Ω of <),
Switch speed is very fast (about 1kHz), avoids the contact wear problem of mechanical relay.
The STM32F030C8 type single-chip microcontroller of controller selection ST company.Display screen uses 128*32 type single color point configuration liquid
Crystalline substance screen.Resistance value input module selects an EC11 type rotary coding switch, rotates left and right selection resistance value, and selection number is pressed on top
Position.Communication interface selects the CH340C type USB of Jiangsu Qin Heng company to turn serial port chip.Power supply uses the 3.7V lithium of a 750mAh
Polymer battery, the XC6206-3.3 voltage stabilizing chip of cooperation TOREX company are reduced to 3.3V and supply above each section.
The resistance box small volume that this example is realized, does not need external power supply, precision is slightly lower, can also connect with computer
It connects, realizes from any resistance value of computer settings.The electricity realized since there is no the contact wear problem of mechanical relay, this example
Hindering case can quick, frequent switching resistance value.
Example three:
Electric resistance array selects 1.0k Ω, 2.0k Ω, 5.0k Ω, 10k Ω, 20k Ω, 50k Ω according to 521 modes, until
1.0M Ω, 2.0M Ω, 5.0M Ω amount to 4 resistance groups, and total 4 resistance groups include 12 logic resistance.Wherein, 2.0k Ω
Logic resistance connects to obtain with the measuring resistance element of two 1k Ω, the standard electric of two 10k Ω of logic resistance of 5.0k Ω
Resistance element parallel connection obtains, and so on.The available 1k Ω~8888k Ω of resistance box that the example provides, is divided into 1k Ω, removes
It goes containing any resistance value other than number 4 and 9.
Switch arrays select 3 74LV4066 type analog switches (every inside has 4 path analoging switch), and advantage is volume
Very little, switch speed is quickly (up to MHz up to a hundred), but its conducting resistance is bigger (about 20 Ω), therefore is not suitable for generating within 1k
Resistance value.
The STM32F030C8 type single-chip microcontroller of controller selection ST company.Display screen uses 128*32 type OLED screen.Resistance value is defeated
Enter module and select 4 key switches, wherein two are served only for coarse adjustment, another two are served only for fine tuning.Mobile screen can also be served only for by two
Cursor position, another two are served only for changing the number of cursor position.This example does not provide communication function, therefore omits communication interface.Electricity
Source uses the 3.7V lithium polymer battery of a 200mAh, and the XC6206-3.3 voltage stabilizing chip of cooperation TOREX company is reduced to
3.3V supplies above each section.
The resistance box volume that this example is realized is minimum, does not need external power supply, is suitble to carry use.Since there is no machinery
The contact wear problem of relay, the resistance box that this example is realized can also quick, frequent switching resistance values.
As shown in figure 4, one embodiment of the invention provides a kind of use of provided resistance box of above-mentioned any embodiment
Method, this method may comprise steps of:
Step 401: the first object resistance value of user's input is obtained using resistance value input module；
Step 402: utilizing controller, each switching device for including to switch arrays according to first object resistance value closes
Conjunction state is controlled, so that the resistance value between two leading-out terminals is equal to first object resistance value.
Resistance box application method provided in an embodiment of the present invention, two leading-out terminals access of resistance box is corresponding electric
Lu Hou is opened by controller according to the resistance value control inputted later by resistance value needed for the input of resistance value input module
The closed state of each switching device in array is closed, to be formed between sub two leading-out terminals corresponding with institute's input resistance value
Resistance.
Optionally, on the basis of resistance box application method shown in Fig. 4, when resistance box includes on display screen, in step
After 401 by resistance value needed for the input of resistance value input module, the resistance value inputted can also be shown by display screen
Show.
In conclusion resistance box and its application method that each embodiment of the present invention provides, at least have following beneficial to effect
Fruit:
1, in embodiments of the present invention, electric resistance array includes one or more resistance groups, between different resistance groups mutually
Series connection, each resistance group include the multiple logic resistance being serially connected, and one in each logic resistance and switch arrays
A switching device is in parallel, and controller can be controlled according to user by the first object resistance value that resistance value input module inputs each
The logic resistance of corresponding number is accessed the circuit between two leading-out terminals, so that two by the closed state of a switching device
Resistance value between a leading-out terminal is equal to first object resistance value.Since each logic resistance passes through a measuring resistance element
It realizes, or is realized by multiple measuring resistance elements in series or in parallel with each other, so as to avoid using in resistance box
The resistance of nonstandard device guarantees the convenience drawn materials in resistance box manufacturing process.
2, in embodiments of the present invention, 4 logic resistance value in the way of 8421 or 5211 in resistance group, only passes through
4 logic resistance can be so that resistance group forms external resistance value equal to 0-9N and is divided into any resistance value of 1N (N is equal to 10n, n
For integer), it can be so that resistance box generates a variety of different resistance values, produced by resistance box by small number of logic resistance
The quantity of resistance in resistance box can be reduced under the premise of resistance measurement and range are identical, so as to reduce resistance box structure
Complexity, and reduce the cost of resistance box.
3, in embodiments of the present invention, in the same resistance group, the resistance value of 4 logic resistance is respectively 1N ohm, 2N
Ohm, 4N ohm and 8N ohm or 4 logic resistance resistance value be respectively 1N ohm, 1N ohm, 2N ohm and 5N ohm,
Wherein N is equal to 10n, n is integer.When electric resistance array includes multiple resistance groups, make the resistance of logic resistance in each resistance group
It is worth corresponding N value to be increased continuously, such resistance box can produce the 10 of alternate constant valuemA resistance value, wherein m is of resistance group
Number, allows resistance box to continuously generate multiple resistance values to meet different usage scenarios, promotes the applicability of resistance box.
4, in embodiments of the present invention, resistance value input module can be button, keyboard or rotary coding switch, specifically may be used
To select one or more of them for user's operation according to the layout of resistance box and usage scenario, so as to meet different use
The individual demand at family promotes satisfaction when user uses resistance box.
5, in embodiments of the present invention, by mechanical relay, photoelectric relay or analog switch chip as switch
Device is in parallel with logic resistance, can make control terminal and controlled terminal electrical isolation, therefore control circuit makes electric resistance array
At interference it is minimum, the accuracy of the provided resistance of resistance box is provided.
6, it when in embodiments of the present invention, selecting photoelectric relay or analog switch chip as switching device, is not present
The problem of contact oxidation and abrasion, so that resistance box has longer service life, and may be implemented quickly, continually to switch
Resistance value further improves the applicability of the resistance box.
7, in embodiments of the present invention, by the way that the display screen being connected with controller is arranged, when user is inputted by resistance value
After resistance value needed for module input, controller can be shown by the resistance value that display screen inputs user, for
Needed for user confirms whether resistance value that it is inputted is it, avoid user due to input resistance value mistake and not discovering causes
The situation of test result mistake occurs, and the usage experience of user can be improved.
8, in embodiments of the present invention, by the way that the communication interface being connected with controller is arranged, computer is connect by communication
Mouthful can to controller send resistance value so that controller by the closed state of each switching device in control switch array come
The resistance value between two leading-out terminals is adjusted, so that user can set the resistance value of resistance box by computer, into one
Step improves the usage experience of user, also makes it possible the resistance value of computer self adjusting resistance case.
It 9, is in embodiments of the present invention, that switch arrays, controller and resistance value input mould by dry cell or rechargeable battery
Block power supply, it is not necessary that AC power source is arranged for resistance box, so that resistance box easily facilitates carrying, can be applicable on site or field
It is used when plant maintenance, further improves the applicability of the resistance box.
It should be noted that, in this document, such as first and second etc relational terms are used merely to an entity
Or operation is distinguished with another entity or operation, is existed without necessarily requiring or implying between these entities or operation
Any actual relationship or order.Moreover, the terms "include", "comprise" or its any other variant be intended to it is non-
It is exclusive to include, so that the process, method, article or equipment for including a series of elements not only includes those elements,
It but also including other elements that are not explicitly listed, or further include solid by this process, method, article or equipment
Some elements.In the absence of more restrictions, the element limited by sentence " including one ", is not arranged
Except there is also other identical factors in the process, method, article or apparatus that includes the element.
Finally, it should be noted that the foregoing is merely presently preferred embodiments of the present invention, it is merely to illustrate skill of the invention
Art scheme, is not intended to limit the scope of the present invention.Any modification for being made all within the spirits and principles of the present invention,
Equivalent replacement, improvement etc., are included within the scope of protection of the present invention.
Claims (10)
1. a kind of resistance box characterized by comprising electric resistance array, switch arrays, controller, resistance value input module and two
Leading-out terminal；
The both ends of the electric resistance array are connected with described two leading-out terminals, the controller respectively with the switch arrays and
The resistance value input module is connected；
The electric resistance array includes at least one resistance group, is serially connected between the different resistance groups, each described electricity
Resistance group includes at least two logic resistance being serially connected, each described logic resistance is by least one measuring resistance element
Composition；
The switch arrays include at least two switching devices, each described logic resistance and a switching device phase
It is in parallel；
The controller, the first object resistance value for being inputted according to user by the resistance value input module control each
The closed state of the switching device, so that the resistance value between described two leading-out terminals is equal to the first object resistance value.
2. resistance box according to claim 1, which is characterized in that
Each described resistance group includes 4 logic resistance being serially connected；
The resistance value of 4 logic resistance is respectively 1N ohm, 2N ohm, 4N ohm and 8N ohm, alternatively, 4 logics
The resistance value of resistance is respectively 1N ohm, 1N ohm, 2N ohm and 5N ohm, wherein N is equal to 10n, n is integer.
3. resistance box according to claim 2, which is characterized in that
When the number for the resistance group that the electric resistance array includes is not less than 2, logic described in each resistance group
The corresponding N value of the resistance value of resistance is increased continuously.
4. resistance box according to claim 1, which is characterized in that
The resistance value input module includes: any one or more in button, keyboard and rotary coding switch.
5. resistance box according to claim 1, which is characterized in that
The switching device includes: mechanical relay, photoelectric relay or analog switch chip.
6. resistance box according to claim 1, which is characterized in that further comprise: display screen；
The display screen is connected with the controller；
The controller is further used in first mesh for getting the user and being inputted by the resistance value input module
After marking resistance value, the first object resistance value is shown by the display screen.
7. according to claim 1 to any resistance box in 6, which is characterized in that further comprise: communication interface；
The communication interface is connected with the controller；
The communication interface can be connected with external computer, the second target resistance values for sending the computer
It is transferred to the controller；
The controller is further used for controlling the closed form of each switching device according to second target resistance values
State, so that the resistance value between described two leading-out terminals is equal to second target resistance values.
8. according to claim 1 to any resistance box in 6, which is characterized in that further comprise: power supply；
The power supply, for powering for the switch arrays, the controller and the resistance value input module, wherein the electricity
Source includes dry cell or rechargeable battery.
9. the application method of any resistance box in a kind of claim 1 to 8 characterized by comprising
The first object resistance value of user's input is obtained using the resistance value input module；
Using the controller, each switching device for including to the switch arrays according to the first object resistance value
Closed state controlled so that the resistance value between described two leading-out terminals be equal to the first object resistance value.
10. according to the method described in claim 9, it is characterized in that, when the resistance box includes the display screen,
After the first object resistance value for obtaining user's input using the resistance value input module, further comprise:
The first object resistance value is shown by the display screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811063628.0A CN109119220A (en) | 2018-09-12 | 2018-09-12 | A kind of resistance box and its application method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811063628.0A CN109119220A (en) | 2018-09-12 | 2018-09-12 | A kind of resistance box and its application method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109119220A true CN109119220A (en) | 2019-01-01 |
Family
ID=64859169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811063628.0A Pending CN109119220A (en) | 2018-09-12 | 2018-09-12 | A kind of resistance box and its application method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109119220A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112201423A (en) * | 2020-10-23 | 2021-01-08 | 清远电力规划设计院有限公司 | Adjustable resistance device and electronic circuit |
| CN112433112A (en) * | 2020-10-28 | 2021-03-02 | 武汉船用机械有限责任公司 | Earth current adjusting device |
| CN112649633A (en) * | 2020-12-17 | 2021-04-13 | 国网浙江省电力有限公司营销服务中心 | Design method capable of adjusting load matrix |
| CN114724792A (en) * | 2022-02-17 | 2022-07-08 | 国网山东省电力公司物资公司 | Program-controlled direct-current standard resistance box and control method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86105213A (en) * | 1986-08-24 | 1987-02-11 | 河南省科学院地理研究所 | Impedance component and special switch thereof with the binary ciruit modulation |
| US20040183625A1 (en) * | 2003-02-26 | 2004-09-23 | Stmicroelectronics S.R.I | Control system for the characteristic parameters of an active filter |
| CN102880155A (en) * | 2012-10-18 | 2013-01-16 | 株洲南车时代电气股份有限公司 | System and method for remote control of resistors |
| CN103531319A (en) * | 2013-09-25 | 2014-01-22 | 国家电网公司 | Combined standard resistor |
| CN104597383A (en) * | 2014-12-08 | 2015-05-06 | 惠州市亿能电子有限公司 | Controllable resistance output device, method thereof and application |
| CN205450237U (en) * | 2015-12-22 | 2016-08-10 | 北京科易动力科技有限公司 | Component module, resistance coupling electric capacity simulator and resistance coupling electric capacity module |
| CN106098278A (en) * | 2016-08-03 | 2016-11-09 | 上海坚芯电子科技有限公司 | Controllable variable resistance device and electronic equipment |
| CN206003575U (en) * | 2016-08-03 | 2017-03-08 | 上海坚芯电子科技有限公司 | Resistance device and electronic equipment |
-
2018
- 2018-09-12 CN CN201811063628.0A patent/CN109119220A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86105213A (en) * | 1986-08-24 | 1987-02-11 | 河南省科学院地理研究所 | Impedance component and special switch thereof with the binary ciruit modulation |
| US20040183625A1 (en) * | 2003-02-26 | 2004-09-23 | Stmicroelectronics S.R.I | Control system for the characteristic parameters of an active filter |
| CN102880155A (en) * | 2012-10-18 | 2013-01-16 | 株洲南车时代电气股份有限公司 | System and method for remote control of resistors |
| CN103531319A (en) * | 2013-09-25 | 2014-01-22 | 国家电网公司 | Combined standard resistor |
| CN104597383A (en) * | 2014-12-08 | 2015-05-06 | 惠州市亿能电子有限公司 | Controllable resistance output device, method thereof and application |
| CN205450237U (en) * | 2015-12-22 | 2016-08-10 | 北京科易动力科技有限公司 | Component module, resistance coupling electric capacity simulator and resistance coupling electric capacity module |
| CN106098278A (en) * | 2016-08-03 | 2016-11-09 | 上海坚芯电子科技有限公司 | Controllable variable resistance device and electronic equipment |
| CN206003575U (en) * | 2016-08-03 | 2017-03-08 | 上海坚芯电子科技有限公司 | Resistance device and electronic equipment |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112201423A (en) * | 2020-10-23 | 2021-01-08 | 清远电力规划设计院有限公司 | Adjustable resistance device and electronic circuit |
| CN112433112A (en) * | 2020-10-28 | 2021-03-02 | 武汉船用机械有限责任公司 | Earth current adjusting device |
| CN112649633A (en) * | 2020-12-17 | 2021-04-13 | 国网浙江省电力有限公司营销服务中心 | Design method capable of adjusting load matrix |
| CN114724792A (en) * | 2022-02-17 | 2022-07-08 | 国网山东省电力公司物资公司 | Program-controlled direct-current standard resistance box and control method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109119220A (en) | A kind of resistance box and its application method | |
| CN201698013U (en) | DC power supply testing device | |
| CN109616061A (en) | Source driving chip protects circuit, display panel, drive circuit and display device | |
| CN106443561B (en) | Integral inspection method and device for electric energy metering device with voltage of 35kV or below | |
| CN1622414A (en) | Residual current circuit breaker | |
| CN209102867U (en) | High voltage isolator and fuse switch condition detecting system | |
| CN109560616A (en) | A kind of feeder means and DC feeder screen | |
| WO2011047605A1 (en) | Power supply device | |
| CN102830385A (en) | Converting device of current mutual inductor and control method of converting device | |
| CN108562815A (en) | Power grid utility power quality control and monitoring system | |
| CN207967976U (en) | Charging system, charging module and mobile terminal | |
| CN106019999A (en) | Power control chip and electronic device provided with chip | |
| CN108680804A (en) | AC and DC resistance load system based on bus marco and control method | |
| CN201174593Y (en) | Reactive and grouped compensation device for capacitor | |
| Maier et al. | A novel contactless capacitive energy and data transfer system | |
| CN203933392U (en) | A kind of D.C. regulated power supply | |
| CN103529339B (en) | A kind of circuit interface and status monitoring IED | |
| CN202796396U (en) | On-load capacitance-adjusting voltage-adjusting tapping switch | |
| CN207336734U (en) | A kind of dielectric dissipation factor standard with remote controler | |
| CN105021962A (en) | Battery electric quantity indication setting method and circuit | |
| CN203206125U (en) | Input voltage automatic switch device for mahjong machine | |
| CN102590781A (en) | Method for constructing secondary load of universal stepless self-adjusting current mutual inductor | |
| CN111505497B (en) | Complete set of switch equipment test system and test method | |
| CN220884070U (en) | State detection circuit compatible with direct current charging standard and charging equipment | |
| CN201656483U (en) | Capacitance compensation cabinet using secondary principle wiring technique |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190101 |