CN114594302A - Current measurement control method, control device and current measurement device - Google Patents
Current measurement control method, control device and current measurement device Download PDFInfo
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- CN114594302A CN114594302A CN202210257587.9A CN202210257587A CN114594302A CN 114594302 A CN114594302 A CN 114594302A CN 202210257587 A CN202210257587 A CN 202210257587A CN 114594302 A CN114594302 A CN 114594302A
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
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Abstract
The application discloses a current measurement control method, a current measurement control device and a current measurement device, wherein the current measurement device comprises a first switch module, a second switch module, a first resistor, a second resistor and a current input terminal, the first end of the first switch module is connected with a first connection point, the second end of the first switch module is connected with a second connection point, the first connection point is a connection point of the first resistor and the second resistor, and the second connection point is a connection point of the second switch module and the current input terminal; the first switch module comprises a first current control module and a second current control module, wherein a first end of the first current control module is connected with a first end of the second current control module, and a second end of the first current control module is connected with a second end of the second current control module.
Description
Technical Field
The present disclosure relates to the field of current measurement, and in particular, to a control method, a control device and a current measuring device for current measurement.
Background
At present, a current measuring device generally includes a large current measuring loop, a small current measuring loop and a small current measuring loop, and the current values of different sizes can be measured through different measuring loops.
However, in practical applications, there is a scenario that a small current measurement needs to be implemented by a large current measurement loop, and since a minimum switching current exists in a switching device of the large current measurement loop in the related art, the small current measurement by the large current measurement loop may cause an additional deviation of a measured value.
Disclosure of Invention
The application discloses a control method and a control device for current measurement and a current measurement device, which solve the problem that the measurement value has extra deviation due to the fact that a large current measurement loop measures small current.
In order to solve the above problems, the following technical solutions are adopted in the present application:
in a first aspect, an embodiment of the present application discloses a current measuring device, including: first switch module, second switch module, first resistance, second resistance and current input terminal, wherein: a first end of the first switch module is connected with a first connection point, and a second end of the first switch module is connected with a second connection point, wherein the first connection point is a connection point of the first resistor and the second resistor, and the second connection point is a connection point of the second switch module and the current input terminal; the first switch module includes: the device comprises a first current control module and a second current control module, wherein a first end of the first current control module is connected with a first end of the second current control module, and a second end of the first current control module is connected with a second end of the second current control module; the second current control module carries current when the current value passing through the first switch module is smaller than a preset threshold value; and under the condition that the current value passing through the first switch module is not less than a preset threshold value, the first current control module carries current.
In a second aspect, an embodiment of the present application discloses a method for controlling current measurement, which is applied to the current measurement apparatus in the first aspect, and includes: receiving a closing operation of a first switch module; and responding to the closing operation, and sequentially controlling a first current control module of the first switch module and a second current control module of the first switch module to be closed.
In a third aspect, an embodiment of the present application discloses a control device for current measurement, including: the receiving module is used for receiving closing operation of the first switch module; and the control module is used for responding to the closing operation and sequentially controlling the closing of the first current control module of the first switch module and the second current control module of the first switch module.
The technical scheme adopted by the application can achieve the following beneficial effects:
the embodiment of the application provides a current measurement device, includes: the first switch module, the second switch module, the first resistor, the second resistor and the current input terminal are connected with the connection point of the first resistor and the second resistor at the first end, and the first switch module, the second switch module and the current input terminal are connected with the connection point of the second switch module and the current input terminal at the second end, a first current control module and a second current control module are arranged in the first switch module, wherein the first end of the first current control module is connected with the first end of the second current control module, the second end of the first current control module is connected with the second end of the second current control module, the second current control module can cut off or conduct smaller voltage and current signals due to the design of the second current control module, when the current value passing through the first switch module is smaller than a preset threshold value, the second current control module carries current, when the current value passing through the first switch module is not smaller than the preset threshold value, the first current control module carries current, so that the problem that extra deviation occurs in a measured value due to the fact that a large current measuring loop measures small current is solved.
Drawings
Fig. 1 is a schematic structural diagram of a current measuring device disclosed in an embodiment of the present application;
fig. 2 is a schematic structural diagram of a first switch module in a current measuring device disclosed in an embodiment of the present application;
FIG. 3 is a schematic flow chart illustrating a method for controlling current measurement according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a control device for current measurement according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present disclosure.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In the specification and claims, "and/or" indicates at least one of electrically connected objects, and a character "/" generally indicates that the preceding and following related objects are in an "or" relationship.
The following describes in detail a control method, a control device, and a current measuring device for current measurement disclosed in the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a current measuring device disclosed in an embodiment of the present application, and fig. 2 is a schematic structural diagram of a first switch module in the current measuring device disclosed in the embodiment of the present application.
As shown in fig. 1 and fig. 2, a current measuring apparatus disclosed in an embodiment of the present application includes: a first switching module 110, a second switching module 120, a first resistor 130, a second resistor 140, and a current input terminal 150, wherein: a first end of the first switch module 110 is connected to a first connection point, and a second end of the first switch module 110 is connected to a second connection point, wherein the first connection point is a connection point between the first resistor 130 and the second resistor 140, and the second connection point is a connection point between the second switch module 120 and the current input terminal 150; a first switch module 110 comprising: a first current control module 111 and a second current control module 112, wherein a first end of the first current control module 111 is connected with a first end of the second current control module 112, and a second end of the first current control module 111 is connected with a second end of the second current control module 112; in the case that the value of the current passing through the first switching module 110 is less than the preset threshold, the second current control module 112 carries the current; in the case that the value of the current passing through the first switching module 110 is not less than the preset threshold, the first current control module 111 carries the current.
The first switch module 110 disclosed in the embodiment of the present application is a high current lead-in switch module in a current measuring device, and the second switch module 120 is a low current and micro current lead-in switch module in the current measuring device.
The current measuring device disclosed by the application, by arranging the first current control module 111 and the second current control module 112 in parallel in the first switch module 110, the second current control module 112 can cut off or conduct smaller voltage and current signals due to the design of the second current control module 112, when the current value passing through the first switch module 110 is smaller than the preset threshold value, the second current control module 112 carries current, and when the current value passing through the first switch module 110 is not smaller than the preset threshold value, the first current control module 111 carries current, and the second current control module 112 does not work.
In this application, the preset threshold may be a minimum switching current value of the first current control module 111, that is, in a case that a current value passing through the first switch module 110 is smaller than the minimum switching current value of the first current control module 111, the second current control module 112 carries current, and in a case that the current value passing through the first switch module 110 is not smaller than the minimum switching current value of the first current control module 111, the first current control module 111 carries current, and the second current control module 112 does not function.
The measuring range of the first switch module in the current measuring device disclosed by the application can be 1 uA-10A.
The embodiment of the application provides a current measurement device, includes: the first switch module 110, the second switch module 120, the first resistor 130, the second resistor 140 and the current input terminal 150 are connected to a connection point of the first resistor 130 and the second resistor 140 at a first end, and the first switch module 110 having a second end connected to a connection point of the second switch module 120 and the current input terminal 150 is provided with a first current control module 111 and a second current control module 112, wherein the first end of the first current control module 111 is connected to the first end of the second current control module 112, and the second end of the first current control module 111 is connected to the second end of the second current control module 112, due to the design of the second current control module 112, it can cut off or conduct a smaller voltage current signal, in case that a current value passing through the first switch module 110 is smaller than a preset threshold, the second current control module 112 carries a current, in case that a current value passing through the first switch module 110 is not smaller than a preset threshold, the first current control module 111 carries current, thereby solving the problem that measuring a small current through a large current measurement loop causes additional deviation of the measured value.
In a further technical solution, as shown in fig. 2, the first switch module 110 may further include a third resistor 113, a first end of the third resistor 113 is connected to a second end of the second current control module 112, and a second end of the third resistor 113 is connected to a second end of the first current control module 111. Specifically, under the condition that the current value passing through the first switch module 110 is not less than the preset threshold, the first current control module 111 carries the current, and in order to avoid the current from impacting the second current control module 112, the second current control module 112 may be protected by providing the third resistor 113.
In an alternative solution, the first current control module 111 and the second current control module 112 may be switches. That is, the first current control module 111 may be a large current input switch, and the second current control module 112 may be a large current input auxiliary switch, wherein a first end of the large current input switch is connected to a first end of the large current input auxiliary switch, and a second end of the large current input switch is connected to a second end of the large current input auxiliary switch, and when a current value passing through the first switch module 110 is smaller than a preset threshold, the large current input auxiliary switch carries a current, and when the current value passing through the first switch module 110 is not smaller than the preset threshold, the large current input switch carries a current, and the large current input auxiliary switch does not function.
In another alternative solution, the first current control module 111 and the second current control module 112 may be relays. That is, the first current control module 111 may be a large current input relay, and the second current control module 112 may be a large current input auxiliary relay, wherein a first end of the large current input relay is connected to a first end of the large current input auxiliary relay, a second end of the large current input relay is connected to a second end of the large current input auxiliary relay, the large current input auxiliary relay carries current when a current value passing through the first switch module 110 is smaller than a preset threshold, the large current input relay carries current when the current value passing through the first switch module 110 is not smaller than the preset threshold, and the large current input auxiliary relay does not function.
Based on the current detection device disclosed in the embodiment of the present application, the embodiment of the present application further discloses a control method for current measurement, as shown in fig. 3, the method includes the following steps:
s310, receiving a closing operation of the first switch module 110.
And S320, responding to the closing operation, and sequentially controlling the first current control module 111 of the first switch module 110 and the second current control module 112 of the first switch module 110 to be closed.
In this application, since the current carried by the first current control module 111 is greater than the current carried by the second current control module 112, when the closing operation of the first switch module 110 is received, the first current control module 111 is controlled to be closed, and then the second current control module 112 is controlled to be closed, so that the second current control module 112 is protected. Furthermore, by using the timing control for sequentially controlling the closing of the first current control module 111 of the first switch module 110 and the second current control module 112 of the first switch module 110, it can be ensured that no open circuit occurs in the switching process of the first current control module 111 and the second current control module 112, and no abnormal voltage drop occurs in the continuous switching process.
It should be noted that, in the embodiment of the present application, the closing of the first current control module 111 does not necessarily mean that the first current control module 111 is turned on, and the closing of the second current control module 112 means that the second current control module 112 is turned on.
The control method for current measurement disclosed in the embodiment of the present application receives a closing operation of the first switch module 110; in response to the closing operation, the first current control module 111 of the first switch module 110 and the second current control module 112 of the first switch module 110 are sequentially controlled to be closed, so as to protect the second current control module 112. In addition, by using the timing control for sequentially controlling the first current control module 111 of the first switch module 110 and the second current control module 112 of the first switch module 110 to be turned on, it can be ensured that no open circuit occurs in the switching process of the first current control module 111 and the second current control module 112, and no abnormal voltage drop occurs in the continuous switching process.
In a further technical solution, the method for controlling current measurement disclosed in the present application may further include: receiving an opening operation of the first switching module 110; in response to the disconnection operation, the second current control module 112 and the first current control module 111 are sequentially controlled to be disconnected. That is, in the case of receiving the operation of turning off the first switching module 110, the second current control module 112 may be protected while turning off the first switching module 110 by sequentially turning off the second current control module 112 and the first current control module 111. Furthermore, by using the timing control for sequentially controlling the second current control module 112 and the first current control module 111 to be disconnected, it can be ensured that no disconnection occurs during the switching process of the first current control module 111 and the second current control module 112, and no abnormal voltage drop occurs during the continuous switching process.
In this embodiment of the application, after sequentially controlling the first current control module 111 of the first switch module 110 and the second current control module 112 of the first switch module 110 to be closed, the method may further include: in the case that the value of the current passing through the first switching module 110 is less than the preset threshold, the second current control module 112 carries the current; in the case that the value of the current passing through the first switching module 110 is not less than the preset threshold, the first current control module 111 carries the current. In this application, the preset threshold may be a minimum switching current value of the first current control module 111, that is, in a case where a current value passing through the first switch module 110 is smaller than the minimum switching current value of the first current control module 111, the second current control module 112 carries current, and in a case where the current value passing through the first switch module 110 is not smaller than the minimum switching current value of the first current control module 111, the first current control module 111 carries current, and the second current control module 112 does not function.
It should be noted that, in the control method for current measurement provided in the embodiment of the present application, the execution subject may be a control device for current measurement, or a control module of the control device for current measurement for executing the control method for current measurement. In the embodiment of the present application, a control method for a current measurement executed by a current measurement control device is taken as an example, and the current measurement control device provided in the embodiment of the present application is described.
Fig. 4 is a schematic structural diagram of a control device for current measurement according to an embodiment of the present application. As shown in fig. 4, the control device 400 for current measurement includes a receiving module 410 and a control module 420.
In this application, the receiving module 410 is configured to receive a closing operation of the first switch module 110; and a control module 420 for controlling the first current control module 111 of the first switch module 110 and the second current control module 112 of the first switch module 110 to be closed in sequence in response to a closing operation.
In one implementation, the receiving module 410 is further configured to receive an opening operation on the first switch module 110; the control module 420 is further configured to sequentially control the second current control module 112 and the first current control module 111 to be turned off in response to the turn-off operation.
In one implementation, the control module 420 is further configured to: after sequentially controlling the first current control module 111 of the first switch module 110 and the second current control module 112 of the first switch module 110 to be closed, the second current control module 112 carries current when the current value passing through the first switch module 110 is smaller than a preset threshold; in the case that the value of the current passing through the first switching module 110 is not less than the preset threshold, the first current control module 111 carries the current.
In the embodiments of the present application, the difference between the embodiments is described in detail, and different optimization features between the embodiments can be combined to form a better embodiment as long as the differences are not contradictory, and further description is omitted here in view of brevity of the text.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A current measuring device, comprising: first switch module, second switch module, first resistance, second resistance and current input terminal, wherein:
a first end of the first switch module is connected with a first connection point, and a second end of the first switch module is connected with a second connection point, wherein the first connection point is a connection point of the first resistor and the second resistor, and the second connection point is a connection point of the second switch module and the current input terminal;
the first switch module includes: the device comprises a first current control module and a second current control module, wherein a first end of the first current control module is connected with a first end of the second current control module, and a second end of the first current control module is connected with a second end of the second current control module;
the second current control module carries current when the current value passing through the first switch module is smaller than a preset threshold value;
and under the condition that the current value passing through the first switch module is not less than a preset threshold value, the first current control module carries current.
2. The current measuring device of claim 1, wherein the first switch module further comprises a third resistor, a first end of the third resistor is connected to the second end of the second current control module, and a second end of the third resistor is connected to the second end of the first current control module.
3. The current measurement device of claim 1, wherein the first current control module and the second current control module are switches.
4. The current measurement device of claim 1, wherein the first current control module and the second current control module are relays.
5. A control method of current measurement applied to the current measurement apparatus according to any one of claims 1 to 4, characterized by comprising:
receiving a closing operation of a first switch module;
and responding to the closing operation, and sequentially controlling a first current control module of the first switch module and a second current control module of the first switch module to be closed.
6. The control method according to claim 5, characterized by further comprising:
receiving a disconnection operation of the first switch module;
and responding to the disconnection operation, and sequentially controlling the second current control module and the first current control module to be disconnected.
7. The control method according to claim 5, further comprising, after the closing of the first current control module that sequentially controls the first switch module and the second current control module that sequentially controls the first switch module:
the second current control module carries current under the condition that the current value passing through the first switch module is smaller than a preset threshold value;
and under the condition that the current value passing through the first switch module is not less than a preset threshold value, the first current control module carries current.
8. A control device for current measurement, comprising:
the receiving module is used for receiving closing operation of the first switch module;
and the control module is used for responding to the closing operation and sequentially controlling the closing of the first current control module of the first switch module and the second current control module of the first switch module.
9. The control device according to claim 8,
the receiving module is further used for receiving the disconnection operation of the first switch module;
the control module is further used for responding to the disconnection operation and sequentially controlling the second current control module and the first current control module to be disconnected.
10. The control device of claim 8, wherein the control module is further configured to:
after the first current control module which sequentially controls the first switch module and the second current control module which sequentially controls the first switch module are closed, the second current control module carries current under the condition that the current value passing through the first switch module is smaller than a preset threshold value;
and under the condition that the current value passing through the first switch module is not less than a preset threshold value, the first current control module carries current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210257587.9A CN114594302A (en) | 2022-03-16 | 2022-03-16 | Current measurement control method, control device and current measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210257587.9A CN114594302A (en) | 2022-03-16 | 2022-03-16 | Current measurement control method, control device and current measurement device |
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| Publication Number | Publication Date |
|---|---|
| CN114594302A true CN114594302A (en) | 2022-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210257587.9A Pending CN114594302A (en) | 2022-03-16 | 2022-03-16 | Current measurement control method, control device and current measurement device |
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| CN (1) | CN114594302A (en) |
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- 2022-03-16 CN CN202210257587.9A patent/CN114594302A/en active Pending
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