CN218240379U - Calibration device of resistance measuring equipment - Google Patents
Calibration device of resistance measuring equipment Download PDFInfo
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- CN218240379U CN218240379U CN202221849960.1U CN202221849960U CN218240379U CN 218240379 U CN218240379 U CN 218240379U CN 202221849960 U CN202221849960 U CN 202221849960U CN 218240379 U CN218240379 U CN 218240379U
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Abstract
The utility model discloses a calibration device of resistance measurement equipment, which comprises a resistance selection circuit, a first calibration terminal, a second calibration terminal and a calibration wire; a first end of the resistance selection circuit is electrically connected with the first check terminal, and a second end of the resistance selection circuit is electrically connected with the second check terminal; the resistance selection circuit comprises at least two verification resistors and a selection switch electrically connected with at least one verification resistor, and the selection switch is used for selecting the size of the resistance between the first end and the second end of the resistance selection circuit; the first checking terminal is electrically connected with one end of the checking conducting wire, and the other end of the checking conducting wire is electrically connected with the second checking terminal. Through the action of the selection switch in the resistance selection circuit, the resistance value of the resistor accessed between the first end and the second end of the resistance selection circuit can be changed, and then the resistance measurement equipment can be verified under the condition that different resistance values are accessed between the first end and the second end of the resistance selection circuit.
Description
Technical Field
The utility model relates to a resistance measurement technical field especially relates to a resistance measurement equipment's calibration equipment.
Background
Resistance measuring devices are used in a very wide range of applications, for example, ground circuits on motor vehicles require resistance measuring devices to measure the resistance of the ground circuit.
In the existing bullet train, the resistance of the grounding loop is measured by using a resistance measuring device of the grounding loop so as to detect whether the resistance of the grounding loop is normal or not.
However, the ground loop resistance measuring equipment used by each motor car is validated by the non-validation device, and the measured value is normal or not in use of the equipment without standard judgment, so that whether the line in the motor car is normally grounded or not cannot be judged, and the running reliability is poor.
SUMMERY OF THE UTILITY MODEL
The utility model provides a resistance measurement equipment's calibration equipment to whether intact check-up that carries out of function to resistance measurement equipment, in order to guarantee the reliability through the resistance measurement equipment measuring circuit of check-up.
The utility model provides a resistance measurement equipment's calibration equipment, a serial communication port, include: the resistance selection circuit, the first verification terminal, the second verification terminal and the verification lead; a first end of the resistance selection circuit is electrically connected with the first check terminal, and a second end of the resistance selection circuit is electrically connected with the second check terminal;
the resistance selection circuit comprises at least two verification resistors and a selection switch electrically connected with at least one verification resistor, and the selection switch is used for selecting the resistance between the first end and the second end of the resistance selection circuit;
the first checking terminal is electrically connected with one end of the checking conducting wire, and the other end of the checking conducting wire is electrically connected with the second checking terminal.
Optionally, the resistor selection circuit includes a selection switch, the selection switch includes a common terminal and selection terminals corresponding to the check resistors one to one, the common terminal is electrically connected to the first terminal of the resistor selection circuit, the selection terminals are electrically connected to the first terminals of the corresponding check resistors, and the second terminals of the check resistors are electrically connected to the second terminals of the resistor selection circuit;
wherein, the resistance values of at least two check resistors are different.
Optionally, the resistor selection circuit includes selection switches corresponding to the check resistors one to one, the check resistors are connected in series with the corresponding selection switches to form check branches, and each check branch is connected in parallel between the first check terminal and the second check terminal.
Optionally, the check resistors are connected in series; the selection switch is connected in parallel with at least one of the check resistors.
Optionally, the calibration device of the resistance measurement device further includes a display unit, and the display unit is electrically connected to the resistance selection circuit and is configured to display the resistance value of the resistance connected between the first calibration terminal and the second calibration terminal.
Optionally, the calibration apparatus of the resistance measurement device further includes a housing, and the display unit is disposed on the housing.
Optionally, the selection switch includes an action portion, the action portion is disposed on the housing, and the action portion is configured to receive a user action to select a resistance between the first end and the second end of the resistance selection circuit.
Optionally, the resistance value of at least one verification resistor is greater than the resistance setting threshold of the resistance measurement device.
Optionally, the first check terminal and the second check terminal are plug terminals.
Optionally, the resistance measuring device is a loop resistance measuring device.
The technical scheme of the embodiment, through the action to selector switch in the resistance selection circuit, can change the resistance value that inserts at resistance selection circuit's first end and second end, and then can insert the condition of different resistances between resistance selection circuit's first end and second end and check up resistance measuring equipment, and then realize whether intact the check-up is carried out to resistance measuring equipment function for when the resistance measuring equipment that the check-up passes is used in the circuit, the reliability of circuit obtains guaranteeing.
It should be understood that the statements herein are not intended to identify key or critical features of any embodiment of the present invention, nor are they intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a calibration apparatus of a resistance measurement device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a calibration apparatus of another resistance measurement device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a calibration apparatus of another resistance measurement device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a calibration apparatus of another resistance measurement device according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another calibration apparatus for resistance measurement device according to an embodiment of the present invention.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a schematic structural diagram of a calibration apparatus of a resistance measurement device provided in an embodiment of the present invention, referring to fig. 1, the calibration apparatus of the resistance measurement device includes: a resistance selection circuit 110, a first check terminal A1, a second check terminal A2, and a check wire 120; a first end B1 of the resistance selection circuit 110 is electrically connected to the first check terminal A1, and a second end B2 of the resistance selection circuit 110 is electrically connected to the second check terminal A2;
the resistance selection circuit 110 comprises at least two verification resistances and a selection switch 111 electrically connected with at least one verification resistance, wherein the selection switch 111 is used for selecting the resistance between the first end B1 and the second end B2 of the resistance selection circuit 110; (the case where the resistance selection circuit 110 includes three check resistances, i.e., a first check resistance R1, a second check resistance R2, and a third check resistance R3, is schematically shown in fig. 1).
The first check terminal A1 is electrically connected to one end of the check wire 120, and the other end of the check wire 120 is electrically connected to the second check terminal A2.
Wherein the resistance measuring device 200 may be a loop resistance measuring device, which may be a loop resistance measuring sensor. The loop resistance measuring device may have a through hole through which a wire in the loop may be passed to perform resistance measurement when measuring the loop resistance. Specifically, when the verification device of this embodiment is used to verify the resistance measurement device, the verification wire 120 of the verification device may pass through the resistance measurement device to simulate a closed-loop resistance value circuit.
In this embodiment, the calibration apparatus of the resistance measurement device includes a resistance selection circuit 110, where the resistance selection circuit 110 includes at least two calibration resistors and a selection switch 111 electrically connected to at least one calibration resistor, where each calibration resistor may be connected in parallel, may also be connected in series, and may also be connected in parallel partially, and is also connected in series partially, and this embodiment is not limited specifically herein. In this embodiment, the verification resistor is a resistor with a known resistance. The selection switch 111 of the resistor selection circuit 110 is closed or opened according to the received user action, thereby controlling the resistance value of the resistor connected between the first end and the second end of the resistor selection circuit 110. Since the resistance values of the respective check resistors are known, the actual values of the resistors actually connected between the first terminal and the second terminal of the resistor selection circuit 110 are known. When the verification device of this embodiment is used to verify the resistance measuring device, the resistance measuring device may obtain a resistance measurement value, and when the resistance measurement value is consistent with the actual resistance value between the first end and the second end connected to the resistance selection circuit 110, it indicates that the resistance measurement value measured by the resistance measuring device is possibly accurate. However, when the resistance value between the first terminal and the second terminal of the resistance selection circuit 110 cannot be changed, that is, the resistance value between the first terminal and the second terminal of the resistance selection circuit 110 is only one, even if the resistance value measured by the resistance measurement device is equal to the first terminal and the second terminal of the resistance selection circuit 110, the performance of the resistance measurement device cannot be verified.
In this embodiment, the resistance selection circuit 110 includes at least one selection switch 111, and the resistance value of the resistor connected between the first terminal and the second terminal of the resistance selection circuit 110 can be changed by operating the selection switch 111, that is, in this embodiment, the resistance selection circuit 110 needs to satisfy a condition that the resistance connected between the first terminal and the second terminal of the resistance selection circuit 110 can be changed. When the same resistance measuring device is verified, resistance values of the resistors connected to the first end and the second end of the resistance selection circuit 110 are changed, and if the resistances connected to the first end and the second end of the resistance selection circuit 110 are different, the resistances measured by the resistance measuring device are accurate, the performance of the resistance measuring device is good, and the resistance measuring device can be verified.
Optionally, in this embodiment, the first verification terminal A1 and the second verification terminal A2 are plug terminals, and when the resistance measurement device is verified, one end of the verification wire 120 connected to one of the plug terminals is directly pulled out, and then the verification wire 120 passes through the resistance measurement device, and then the verification wire 120 is connected to the plug terminal. Set up first check-up terminal A1 and second check-up terminal A2 and be the plug wire terminal, can be so that when proofreading to resistance measurement equipment, the operation is comparatively simple and convenient, saves operating time.
The calibration device of the resistance measurement equipment comprises a resistance selection circuit, a first calibration terminal, a second calibration terminal and a calibration wire; a first end of the resistance selection circuit is electrically connected with the first check terminal, and a second end of the resistance selection circuit is electrically connected with the second check terminal; the resistance selection circuit comprises at least two verification resistors and a selection switch electrically connected with at least one verification resistor, and the selection switch is used for selecting the size of the resistance between the first end and the second end of the resistance selection circuit; the first checking terminal is electrically connected with one end of the checking conducting wire, and the other end of the checking conducting wire is electrically connected with the second checking terminal. The checking device of this embodiment, through the action to select switch in the resistance selection circuit, can change the resistance value of inserting at the first end and the second end of resistance selection circuit, and then can insert the condition of different resistances between the first end and the second end of resistance selection circuit and check resistance measurement equipment, and then realize checking whether intact to resistance measurement equipment function for when the resistance measurement equipment that the check-up passes is used in the circuit, the reliability of circuit obtains guaranteeing.
With reference to fig. 1, optionally, the resistor selection circuit 110 includes a selection switch 111, where the selection switch 111 includes a common terminal C1 and selection terminals corresponding to the verification resistors one by one, the common terminal C1 is electrically connected to the first terminal B1 of the resistor selection circuit 110, the selection terminals are electrically connected to the first terminals of the corresponding verification resistors, and the second terminals of the verification resistors are electrically connected to the second terminals B2 of the resistor selection circuit 110; wherein, the resistance values of at least two check resistors are different.
The check resistors in the resistor selection circuit 110 may be connected in parallel as shown in fig. 1. The selection switch 111 may be a single-pole multi-throw switch, and the selection switch 111 includes a common terminal C1 and at least two selection terminals, and the number of the selection terminals is equal to the number of the verification resistors. Fig. 1 schematically shows a case where the resistor selection circuit 110 includes three check resistors, and the corresponding selection switch 111 includes three selection terminals, where a first check resistor R1 is correspondingly connected to the first selection terminal K1, a second check resistor R2 is correspondingly connected to the second selection terminal K2, and a third check resistor R3 is correspondingly connected to the third selection terminal K3. By the operation of the selection switch 111, the check resistor connected between the first terminal and the second terminal of the resistor selection circuit 110 can be selected as one of the three check resistors. In this embodiment, the resistances of at least two verification resistors are different, so that the change of the resistance between the first end and the second end of the resistance selection circuit 110 can be realized by the action of the selection switch 111, and the verification of the resistance measurement device can be further ensured.
Fig. 2 is a schematic structural diagram of another resistance measurement device's calibration equipment that the embodiment of the present invention provides, refer to fig. 2, and optionally, resistance selection circuit 110 includes selection switch 111 with calibration resistance one-to-one, and calibration resistance forms the calibration branch with the selection switch 111 series connection that corresponds, and each calibration branch is connected in parallel between first calibration terminal A1 and second calibration terminal A2.
Fig. 2 schematically shows a case where the resistance selection circuit 110 includes three check resistors, i.e., a first check resistor R1, a second check resistor R2, and a third check resistor R3, and accordingly, the resistance selection circuit includes three selection switches, i.e., a first selection switch T1, a second selection switch T2, and a third selection switch T3. The first check resistor R1 is connected in series with the first selection switch T1, the second check resistor R2 is connected in series with the second selection switch T2, and the third check resistor R3 is connected in series with the third selection switch T3.
Specifically, compared to the verification apparatus shown in fig. 1, in the verification apparatus of the present embodiment, the number of resistors connected between the first terminal and the second terminal of the resistor selection circuit 110 may be one, two, or more. When one of the verification branches in the resistance selection circuit 110 is turned on, that is, when one of the selection switches 111 is turned on, the number of the resistors connected between the first terminal and the second terminal of the resistance selection circuit 110 is one. When two verification branches in the resistance selection circuit 110 are turned on, that is, when two selection switches 111 are closed, the number of the resistances connected to the first end and the second end of the resistance selection circuit 110 is two, and the two resistances are connected in parallel. When the plurality of verification branches in the resistance selection circuit 110 are turned on, that is, when the plurality of selection switches 111 are closed, the number of the resistors connected to the first end and the second end of the resistance selection circuit 110 is multiple, and the multiple resistors are connected in parallel. The calibration device of the embodiment can realize more resistance values through less resistance quantity, and is favorable for calibration work of resistance measurement equipment.
Fig. 3 is a schematic structural diagram of another calibration apparatus for resistance measurement device according to an embodiment of the present invention, and referring to fig. 3, optionally, the calibration resistors are connected in series; the selection switch 111 is connected in parallel with at least one check resistor. Fig. 3 schematically shows that the verifying device comprises two verifying resistors connected in series, namely a first verifying resistor R1 and a second verifying resistor R2, and a selection switch 111, wherein the selection switch 111 is connected in parallel with the second verifying resistor R2.
Specifically, in this embodiment, when the selection switch 111 is closed, the resistors connected in parallel with the selection switch 111 are short-circuited, and the number of resistors connected between the first end B1 and the second end B2 of the resistor selection circuit 110 can be selected by the operation of the selection switch 111, so as to control the connection of the resistors between the first end and the second end of the resistor selection circuit 110.
Fig. 4 is a schematic structural diagram of another resistance measuring device's verifying attachment provided by the embodiment of the present invention, referring to fig. 4, optionally, the resistance measuring device's verifying attachment further includes a display unit 130, and the display unit 130 is electrically connected with the resistance selection circuit 110, and is used for displaying the resistance value of the resistance connected between the first verification terminal A1 and the second verification terminal A2.
Specifically, the resistance value of the resistor connected between the first check terminal A1 and the second check terminal A2 is displayed through the display unit 130, so that a user can visually know the resistance value of the resistor actually connected between the first check terminal A1 and the second check terminal A2, and then the resistance value measured by the resistor measuring device is compared conveniently, and whether the function of the resistor measuring device is complete or not is determined conveniently.
Fig. 5 is a schematic structural diagram of another verification apparatus for resistance measurement device according to an embodiment of the present invention, referring to fig. 5, optionally, the verification apparatus for resistance measurement device further includes a housing 140, and the display unit is disposed on the housing 140.
Specifically, the verification device is arranged to comprise the shell 140, so that the verification device is not easy to damage and is more durable. The display unit is disposed on the housing 140, which facilitates the user to observe the actual resistance value connected between the first verification terminal A1 and the second verification terminal A2.
With continued reference to fig. 5, optionally, the selection switch 111 includes an action portion 1111, the action portion 1111 is disposed on the housing 140, and the action portion 1111 is configured to receive a user action to select a resistance value between the first terminal and the second terminal of the resistance selection circuit 110.
Specifically, the calibration device shown in fig. 5 may correspond to the external view of the calibration device shown in fig. 1, and by operating the operation unit 1111, the resistors connected between the first calibration terminal A1 and the second calibration terminal A2 may be selected, so as to realize the resistance control of different gears, and further realize the calibration of the resistance measurement device.
On the basis of the above technical solution, optionally, the resistance value of at least one verification resistor is greater than the resistance setting threshold of the resistance measurement device.
The resistance setting threshold value may be a resistance upper limit value of the circuit measured by resistance measurement. Specifically, setting the resistance value of at least one check resistor to be larger than a set threshold value of the resistance measuring equipment, and controlling the resistance between the first end and the second end of the resistance selection circuit to be the resistance larger than the set threshold value when the resistance measuring equipment is checked, observing whether the resistance measuring equipment alarms or not, if the resistance between the first end and the second end of the resistance selection circuit is reduced to be smaller than the set threshold value, and removing the alarm; the alarm function of the resistance measuring equipment is good, otherwise, the alarm function is damaged. The resistance value of at least one checking resistor is set to be larger than the set resistor threshold value, so that the alarm function of the resistor measuring equipment can be checked. Optionally, the resistance value of at least one checking resistor is smaller than the resistor setting threshold of the resistor measuring device, so that the checking of the alarm function of the resistor measuring device is more conveniently realized.
The above detailed description does not limit the scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A calibration device for a resistance measurement apparatus, comprising: the resistance selection circuit, the first verification terminal, the second verification terminal and the verification lead; a first end of the resistance selection circuit is electrically connected to the first check terminal, and a second end of the resistance selection circuit is electrically connected to the second check terminal;
the resistance selection circuit comprises at least two verification resistors and a selection switch electrically connected with at least one verification resistor, and the selection switch is used for selecting the resistance between the first end and the second end of the resistance selection circuit;
the first checking terminal is electrically connected with one end of the checking wire, and the other end of the checking wire is electrically connected with the second checking terminal.
2. The calibration device of the resistance measurement equipment according to claim 1, wherein the resistance selection circuit comprises a selection switch, the selection switch comprises a common terminal and a selection terminal in one-to-one correspondence with the calibration resistors, the common terminal is electrically connected with the first terminal of the resistance selection circuit, the selection terminal is electrically connected with the first terminal of the corresponding calibration resistor, and the second terminal of the calibration resistor is electrically connected with the second terminal of the resistance selection circuit;
wherein, the resistance values of at least two of the check resistors are different.
3. The calibration device of the resistance measurement apparatus according to claim 1, wherein the resistance selection circuit includes the selection switches in one-to-one correspondence with the calibration resistances, the calibration resistances are connected in series with the corresponding selection switches to form calibration branches, and each of the calibration branches is connected in parallel between the first calibration terminal and the second calibration terminal.
4. The verification device of the resistance measurement apparatus according to claim 1, wherein the verification resistors are connected in series; the selection switch is connected in parallel with at least one of the verification resistors.
5. The calibration device of the resistance measurement apparatus according to claim 1, further comprising a display unit electrically connected to the resistance selection circuit for displaying a resistance value of the resistance connected between the first calibration terminal and the second calibration terminal.
6. The calibration device of the resistance measurement apparatus according to claim 5, further comprising a housing, wherein the display unit is disposed on the housing.
7. The calibration device of claim 6, wherein the selection switch comprises an actuation portion disposed on the housing, the actuation portion configured to receive a user action to select a magnitude of the resistance between the first end and the second end of the resistance selection circuit.
8. The calibration device of the resistance measurement apparatus according to claim 1, wherein a resistance value of at least one of the calibration resistors is larger than a resistance setting threshold value of the resistance measurement apparatus.
9. The verification device of the resistance measurement apparatus according to claim 1, wherein the first verification terminal and the second verification terminal are both patch terminals.
10. The verification device of the resistance measurement apparatus according to claim 1, wherein the resistance measurement apparatus is a loop resistance measurement apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221849960.1U CN218240379U (en) | 2022-07-18 | 2022-07-18 | Calibration device of resistance measuring equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221849960.1U CN218240379U (en) | 2022-07-18 | 2022-07-18 | Calibration device of resistance measuring equipment |
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| Publication Number | Publication Date |
|---|---|
| CN218240379U true CN218240379U (en) | 2023-01-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202221849960.1U Active CN218240379U (en) | 2022-07-18 | 2022-07-18 | Calibration device of resistance measuring equipment |
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| CN (1) | CN218240379U (en) |
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- 2022-07-18 CN CN202221849960.1U patent/CN218240379U/en active Active
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