CN214845452U - Resistance device - Google Patents
Resistance device Download PDFInfo
- Publication number
- CN214845452U CN214845452U CN202120295989.9U CN202120295989U CN214845452U CN 214845452 U CN214845452 U CN 214845452U CN 202120295989 U CN202120295989 U CN 202120295989U CN 214845452 U CN214845452 U CN 214845452U
- Authority
- CN
- China
- Prior art keywords
- resistor
- current
- temperature
- fixing plate
- plate
- 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.)
- Active
Links
Images
Landscapes
- Details Of Resistors (AREA)
Abstract
The utility model discloses a resistance device, resistance device includes: the current detection resistor is used for acquiring the detection current of the resistor device; and a temperature-sensitive resistor to obtain a temperature of the resistive device; the resistor device further comprises an external package for packaging the current sensing resistor and the temperature sensing resistor into a single device structure; the leading-out ends of the pins of the current detection resistor and the leading-out ends of the pins of the temperature-sensing resistor are exposed outside the external package. The utility model discloses can make resistance device can last work under the constant temperature state, guarantee current measurement result's accuracy and reliability from this.
Description
Technical Field
The utility model relates to a detection device technical field. And more particularly, to a resistive device.
Background
In current detection, a resistor is an indispensable device (this resistor is hereinafter referred to as a current detection resistor), and the principle thereof is: the method comprises the steps of enabling current to pass through a resistor with a known resistance value, measuring voltages at two ends of the resistor by using a universal meter, obtaining I (U/R) according to ohm's law, and assuming that the value of a voltmeter is very accurate, the stability and precision of the resistance value directly influence the accuracy of a current value. However, the magnitude of the resistance value changes with the temperature, and the temperature change may be from two aspects: firstly, the change of the environmental temperature is common and inevitable due to the fact that the electronic equipment has a plurality of heating devices; secondly, the resistance itself will generate heat when current passes through, and the resistance value will change. Under the action of the two factors, the current measurement inevitably has large errors, and the size of the errors is influenced by the temperature coefficient of the resistance material.
The temperature coefficient of the resistor is as large as hundreds of PPM/DEG C and as small as a few tenths of PPM/DEG C. However, the low PPM resistor has a long delivery period due to its high price and complex material purification process, and is generally unacceptable by manufacturers, and even if the low PPM resistor is used, the resistance value changes considerably when the environmental temperature changes, which translates into a change in temperature. A higher PPM resistor can be used if the resistor can be operated in a constant temperature environment. For example, the resistance of 10 PPM/DEG C is finally obtained according to the accuracy of the measured current, and only the resistance of 1 PPM/DEG C can be selected in consideration of the change of 10 ℃ of the ambient temperature. However, the PPM of the resistor cannot be lowered without limit as the accuracy of current measurement increases.
Therefore, the defects of the prior art are more obvious, namely the current detection resistor is easy to be subjected to environmental temperature change and unknown resistance value change, so that the current measurement result is inaccurate, and the measurement deviation cannot be eliminated through verification. In addition, the current detection resistor generates heat inside itself, the heat transfer hysteresis is delayed, and the change of the internal temperature cannot be sensed outside the resistor in time, so that when the temperature control unit is used, the resistor is difficult to work in a constant temperature mode.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a resistor device. So as to obtain accurate and reliable current measurement results.
In order to solve the technical problem, the utility model adopts the following technical scheme:
a resistive device, the resistive device comprising:
the current detection resistor is used for acquiring the detection current of the resistor device; and
the temperature sensing resistor is used for acquiring the temperature of the resistance device;
the resistor device further comprises an external package for packaging the current sensing resistor and the temperature sensing resistor into a single device structure;
the leading-out ends of the pins of the current detection resistor and the leading-out ends of the pins of the temperature-sensing resistor are exposed outside the external package.
In addition, preferably, the resistor device includes a wrapping layer wrapping the current detection resistor and the temperature-sensitive resistor, the wrapping layer is made of insulating resin, and the wrapping layer constitutes the external package.
In addition, preferably, the resistor device further includes a fixing plate, and the current detection resistor and the temperature-sensing resistor are fixed to the fixing plate through an encapsulation layer; the packaging layer covers the current detection resistor and the temperature sensing resistor;
the fixing plate and the packaging layer jointly form the external package.
Further, it is preferable that at least a part of the main body of the current detecting resistor is in contact with the fixed plate; and/or at least part of the main body of the temperature-sensitive resistor is in contact with the fixing plate.
In addition, it is preferable that the current detection resistor and the temperature-sensitive resistor are located on the same side of the plate surface of the fixed plate.
In addition, preferably, the resistance device further includes a heat conducting plate, and the heat conducting plate is fixedly combined with a side plate surface of the fixing plate, which is away from the current detecting resistor and the temperature sensing resistor.
In addition, preferably, the fixing plate includes an exposed plate surface exposed to the heat conducting plate, the current detecting resistor and the temperature sensing resistor, and the encapsulation layer covers at least the exposed plate surface of the fixing plate.
In addition, preferably, the heat conducting plate covers a plate surface of the fixing plate, which is used for being correspondingly matched with the heat conducting plate.
In addition, preferably, the fixing plate is made of insulating ceramic; the heat conducting plate is made of copper.
Further, it is preferable that the current detection resistor is a four-wire system current detection resistor or a two-wire system current detection resistor.
The utility model has the advantages as follows:
compared with the prior art, the utility model discloses constitute an solitary resistance device structure with temperature sensing resistor and detection resistor, when leading to examining the resistance of current resistor and changing because of the temperature variation, through the timely output feedback volume of temperature sensing resistor, outside accuse temperature unit can in time perceive the inside temperature variation who examines current resistor of resistance device to under the control of outside accuse temperature unit, make resistance device can be under constant temperature state continuous work, guarantee current measurement result's accuracy and reliability from this.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 shows a schematic structural diagram of an embodiment of a resistor device provided by the present invention.
Fig. 2 shows a schematic structural diagram of a preferred embodiment of the resistor device provided by the present invention.
Fig. 3 shows a schematic structural diagram of another preferred embodiment of the resistor device provided by the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be considered a part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
To solve the drawbacks of the prior art, and to obtain an accurate and reliable current measurement result, first of all, as shown in fig. 1, in one embodiment, the present invention provides a resistance device including: a current detecting resistor 1 and a temperature sensing resistor 2, wherein the current detecting resistor 1 is used for obtaining a detection current of the resistance device; the temperature sensing resistor 2 is used for acquiring the temperature of the resistance device; the current detecting resistor 1 and the temperature sensing resistor 2 are arranged at intervals without contacting each other. The resistance device provided by the present embodiment further includes an external package for packaging the current detection resistor 1 and the temperature-sensitive resistor 2 into a single device structure; the leading-out ends of the pins of the current detecting resistor 1 and the leading-out ends of the pins of the temperature sensing resistor 2 are exposed out of the external package. The utility model provides a resistance device constitutes an solitary resistance device structure with temperature sensing resistor and current detection resistor, when leading to examining the current detection resistor resistance and changing because of temperature variation, through the timely output feedback volume of temperature sensing resistor, outside accuse temperature unit can in time perceive the inside temperature variation who examines current detection resistor of resistance device to under the control of outside accuse temperature unit, make resistance device can continuous work under the constant temperature state, guarantee current measurement result's accuracy and reliability from this. In the present embodiment, the outer package is formed of a sealing layer 3 that covers the current sensing resistor 1 and the temperature sensitive resistor 2, and the sealing layer 3 may be made of an insulating resin.
On the basis of the embodiment shown in fig. 1, when the detection current in the current detection resistor is small, the overall temperature of the resistor device is not high, and an auxiliary heat dissipation structure is not required to be additionally arranged. With reference to fig. 2, the present invention further provides a preferred resistor structure, which is different from the embodiment shown in fig. 1, in the embodiment shown in fig. 2, the resistor further includes a fixing plate 4, and the current sensing resistor 1 and the temperature sensing resistor 2 are fixed on the fixing plate 4 through an encapsulating layer 5; the packaging layer 5 covers the current detection resistor 1 and the temperature-sensitive resistor 2; the fixing plate 4 and the encapsulation layer 5 together form the outer encapsulation. Preferably, the material of the fixing plate 4 may be selected from insulating ceramics having a small heat distortion. The temperature-sensing resistor is preferably a platinum resistor, and the temperature detection precision is higher than 0.5 ℃.
In the resistor device structure shown in fig. 2, the fixed plate 4, the current sensing resistor 1, the temperature-sensitive resistor 2, and the external package collectively constitute the resistor device. The resistance device is applied to a current detection structure device in the form of a single device structure. During practical use, the resistor device provided by the embodiment can be fixed on an auxiliary heat dissipation structure through the fixing plate 4, when the detection current in the current detection resistor is large, the temperature of the current detection resistor is obviously increased, and the auxiliary heat dissipation structure can be used for heat dissipation and cooling of the resistor device, so that the resistor device can continuously work within a temperature adjustable range, and the accuracy and reliability of the output current measurement result of the current detection resistor 1 are ensured.
To ensure the heat dissipation effect, the current detecting resistor 1 and the temperature sensing resistor 2 are optionally located on the same side of the fixing plate 4. And at least part of the body of the current detecting resistor 1 is in contact with the fixed plate 4; at least part of the body of the temperature sensitive resistor 2 is in contact with the fixed plate 4.
On the basis of the embodiment shown in fig. 2, fig. 3 shows a schematic structural diagram of another preferred embodiment of the resistance device provided by the present invention, specifically, in the embodiment shown in fig. 3, the resistance device further includes a heat conducting plate 6, and the heat conducting plate 6 is fixed on a side plate surface of the fixing plate 4 away from the current detecting resistor 1 and the temperature-sensitive resistor 2. As will be understood by those skilled in the art, the side of the heat-conducting plate 6 facing away from the fixing plate 4 needs to be exposed to realize heat conduction. In conjunction with the structure of the resistance device shown in fig. 3, the heat-conducting plate 6, the fixing plate 4, the current-detecting resistor 1, the temperature-sensitive resistor 2, and the external package collectively constitute the resistance device, which is applied in the current-detecting structural apparatus in the form of a single device structural body.
During practical use, when the detection current in the current detection resistor 1 is large, the temperature of the current detection resistor 1 is obviously increased, the heat conduction plate 6 can dissipate heat and cool the current detection resistor 1, and the accuracy and reliability of the output current measurement result of the current detection resistor 1 are ensured. In addition, the advantage of arranging the heat-conducting plate 6 is that, the heat-conducting plate 6 has the characteristic of fast heat conduction, not only can the heat-conducting plate 6 effectively dissipate the heat of the current-detecting resistor 1, but also can utilize the heat-conducting plate 6 to heat and heat the current-detecting resistor 1, that is to say, when the external environment temperature is too low, and the working environment temperature does not meet the normal working temperature of the current-detecting resistor, the heat-conducting plate 6 can be used for heating the current-detecting resistor 1, so that the current-detecting resistor 1 can work in a constant temperature environment, and the stable and accurate detection current can be obtained.
Further, the heat conducting plate 6 is made of a metal material with low heat resistance, the heat conducting plate 6 includes but is not limited to a red copper material, and the surface of the heat conducting plate 6 can be plated with nickel to prevent oxidation and reduce heat conduction. As a preferred embodiment of the resistor device structure shown in fig. 3, considering the structural strength between the fixing plate 4 and the heat conducting plate 6 and ensuring timely and rapid heat transfer between the current detecting resistor 1 and the heat conducting plate 6, the encapsulating layer 5 covers at least the exposed plate surface of the fixing plate 4 exposed out of the heat conducting plate 6, the current detecting resistor 1 and the temperature-sensitive resistor 2. And the heat conducting plate 6 covers the surface of the fixing plate 4, which is used for being matched with the heat conducting plate 6 correspondingly, so that the contact area between the heat conducting plate 6 and the fixing plate 4 is increased to the maximum extent, and the optimal heat dissipation effect is achieved.
Combine the utility model discloses the resistance device structure of the different structure styles that fig. 1 to fig. 3 show, for the precision that improves current detection, the current detection resistor that the resistance device that receives was chooseed for use among each embodiment examines the current resistor for four-wire system, according to actual demand to and use the difference of scene, examine in other embodiments the current resistor also can select two-wire system to examine the current resistor, to this the utility model discloses do not make the restriction.
Obviously, the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it is obvious for those skilled in the art to make other variations or changes based on the above descriptions, and all the embodiments cannot be exhausted here, and all the obvious variations or changes that belong to the technical solutions of the present invention are still in the protection scope of the present invention.
Claims (10)
1. A resistive device, comprising:
the current detection resistor is used for acquiring the detection current of the resistor device; and
the temperature sensing resistor is used for acquiring the temperature of the resistance device;
the resistor device further comprises an external package for packaging the current sensing resistor and the temperature sensing resistor into a single device structure;
the leading-out ends of the pins of the current detection resistor and the leading-out ends of the pins of the temperature-sensing resistor are exposed outside the external package.
2. The resistor device according to claim 1, wherein the resistor device comprises a wrapping layer wrapping the current sensing resistor and the temperature sensing resistor, the wrapping layer is made of insulating resin, and the wrapping layer constitutes the outer package.
3. The resistor device according to claim 1, further comprising a fixing plate, wherein the current sensing resistor and the temperature sensing resistor are fixed on the fixing plate through an encapsulating layer; the packaging layer covers the current detection resistor and the temperature sensing resistor;
the fixing plate and the packaging layer jointly form the external package.
4. A resistor device according to claim 3, characterized in that at least part of the body of the current sensing resistor is in contact with the fixed plate; and/or at least part of the main body of the temperature-sensitive resistor is in contact with the fixing plate.
5. The resistor device according to claim 3, wherein the current sensing resistor and the temperature sensing resistor are located on the same board surface of the fixing plate.
6. The resistor device as claimed in claim 3, further comprising a heat conducting plate fixed on a side of the fixing plate facing away from the current detecting resistor and the temperature sensing resistor.
7. The resistor device as claimed in claim 6, wherein the fixing plate includes an exposed plate exposed from the heat conducting plate, the current sensing resistor and the temperature sensing resistor, and the encapsulation layer covers at least the exposed plate of the fixing plate.
8. The resistor device of claim 6 wherein the thermally conductive plate covers a face of the fixed plate adapted to mate with the thermally conductive plate.
9. The resistor device according to claim 6, wherein the fixing plate is made of insulating ceramic; the heat conducting plate is made of copper.
10. The resistor device according to claim 1, wherein the current detection resistor is a four-wire current detection resistor or a two-wire current detection resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120295989.9U CN214845452U (en) | 2021-02-02 | 2021-02-02 | Resistance device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120295989.9U CN214845452U (en) | 2021-02-02 | 2021-02-02 | Resistance device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214845452U true CN214845452U (en) | 2021-11-23 |
Family
ID=80005105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120295989.9U Active CN214845452U (en) | 2021-02-02 | 2021-02-02 | Resistance device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214845452U (en) |
-
2021
- 2021-02-02 CN CN202120295989.9U patent/CN214845452U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5035428B2 (en) | Battery temperature measuring device, battery temperature measuring method, battery manufacturing method | |
| CA2801464C (en) | Process variable transmitter with thermocouple polarity detection | |
| US6354736B1 (en) | Wide temperature range RTD | |
| US11293948B2 (en) | System and method for correcting current value of shunt resistor | |
| CN108489628A (en) | A kind of measureing method of high-temperature | |
| EP3462152B1 (en) | Accurate and fast response temperature measurement | |
| CN112384775A (en) | Thermometer with diagnostic function | |
| CN214845452U (en) | Resistance device | |
| GB2337121A (en) | Temperature measurement arrangement | |
| JP3210530B2 (en) | Thermistor flow rate sensor | |
| WO1999008494A1 (en) | Temperature measuring type outside connecting mechanism for printed wiring board | |
| CN110364320A (en) | A kind of current sense resistor structure | |
| US20240053209A1 (en) | Thermometer with a diagnostic function | |
| JP6373979B2 (en) | Infrared sensor | |
| CN210108556U (en) | Calibration device of high-precision temperature measurement circuit for aerospace use | |
| CN106343962B (en) | Single-side multipoint temperature measurement method and system | |
| CN220252039U (en) | Current detection assembly | |
| CN218524257U (en) | Needle type temperature measuring probe | |
| JP3328408B2 (en) | Surface temperature measurement method | |
| TWI412750B (en) | Probe circuit | |
| Ahmed | Engine Coolant Temperature Sensor in Automotive Applications | |
| CN214927137U (en) | Nozzle module of three-dimensional printing equipment and three-dimensional printing equipment | |
| CN202235328U (en) | Contact temperature measurement device of temperature haptic display device | |
| CN211178799U (en) | Metering device for temperature sensor | |
| JPS60501721A (en) | Temperature measurement probe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |