CN220381864U - Circuit board for disc brake displacement sensor - Google Patents
Circuit board for disc brake displacement sensor Download PDFInfo
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- CN220381864U CN220381864U CN202322042243.9U CN202322042243U CN220381864U CN 220381864 U CN220381864 U CN 220381864U CN 202322042243 U CN202322042243 U CN 202322042243U CN 220381864 U CN220381864 U CN 220381864U
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- carbon film
- electrically connected
- circuit board
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 31
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 80
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 80
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 11
- 230000000087 stabilizing effect Effects 0.000 claims description 11
- 239000004642 Polyimide Substances 0.000 claims description 5
- 229920001721 polyimide Polymers 0.000 claims description 5
- -1 polytetrafluoroethylene Polymers 0.000 claims description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 5
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- 239000011347 resin Substances 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 4
- 239000011152 fibreglass Substances 0.000 claims description 4
- 238000003698 laser cutting Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 229910044991 metal oxide Inorganic materials 0.000 claims description 3
- 150000004706 metal oxides Chemical class 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 239000011889 copper foil Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
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- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011224 oxide ceramic Substances 0.000 description 2
- 229910052574 oxide ceramic Inorganic materials 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 238000009966 trimming Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
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- 229910052751 metal Inorganic materials 0.000 description 1
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- Laser Beam Processing (AREA)
Abstract
Embodiments of the present disclosure provide a circuit board for a disc brake displacement sensor, comprising: the circuit main board comprises a first surface and a second surface which are oppositely arranged; the functional circuit unit comprises a first functional circuit unit arranged on the first surface and a second functional circuit unit arranged on the second surface, and the first functional circuit unit is electrically connected with the second functional circuit unit through at least one via hole penetrating through the circuit main board; the second functional circuit unit comprises a carbon film circuit, wherein the carbon film circuit comprises a plurality of carbon film resistors which are arranged in series along the length direction of a circuit main board, and the carbon film resistors comprise at least one laser resistance adjusting resistor; the first functional circuit unit includes a signal processing unit configured to receive an input signal generated by the carbon film circuit and convert the input signal into an output signal. The circuit board can adjust the resistance value of the laser resistance adjusting resistor according to requirements, so that the disc brake displacement sensor can acquire information more accurately.
Description
Technical Field
The present disclosure relates to the field of circuit technology, and more particularly, to a circuit board for a disc brake displacement sensor.
Background
Disc brakes generally clamp a disc by providing brake pads, and under the action of the clamping force, friction torque is generated between the brake pads and the disc, so that the rotating disc is finally braked. The brake pads are worn during friction braking, and in order to monitor the wear of the brake pads of the disc brake, a disc brake displacement sensor is generally adopted for realizing the brake pads. A circuit board is arranged in the displacement sensor of the disc brake, and the change of a displacement signal is determined by sliding a brush piece of the sensing element on a carbon film of the circuit board. However, for various reasons such as carbon film resistance manufacturing errors, the requirement of the consistency of actual resistance values cannot be met, and thus, the information acquired by the disc brake displacement sensor is inaccurate.
Disclosure of Invention
In view of this, the technical problem to be solved by the present disclosure is how to provide a circuit board with a relatively accurate resistance, so that the disc brake displacement sensor can obtain information more accurately.
Embodiments of the present disclosure provide a circuit board of a disc brake displacement sensor, which can provide a circuit board with accurate resistance, and effectively solve the above-mentioned problems.
Circuit boards for disc brake displacement sensors of embodiments of the present disclosure include, but are not limited to: the circuit main board comprises a first surface and a second surface which are oppositely arranged; the functional circuit unit comprises a first functional circuit unit arranged on the first surface and a second functional circuit unit arranged on the second surface, and the first functional circuit unit is electrically connected with the second functional circuit unit through at least one via hole penetrating through the circuit main board; the second functional circuit unit comprises a carbon film circuit, wherein the carbon film circuit comprises a plurality of carbon film resistors which are arranged in series along the length direction of the circuit main board, and the carbon film resistors comprise at least one laser resistance-adjusting resistor; the first functional circuit unit includes a signal processing unit configured to receive an input signal generated by the carbon film circuit and convert the input signal into an output signal.
In some exemplary embodiments of the present disclosure, a ground signal terminal, a voltage signal terminal, and an output signal terminal are further disposed on the first surface; the ground signal terminal, the voltage signal terminal and the output signal terminal are configured as sheet contact terminals.
In some exemplary embodiments of the present disclosure, the signal processing unit includes: a first connection point electrically connected to the voltage signal terminal; a second connection point electrically connected to the ground signal terminal; an input signal connection point electrically connected to the second functional circuit unit through a via; and an output signal connection point electrically connected to the output signal terminal.
In some exemplary embodiments of the present disclosure, the first functional circuit unit further includes: a voltage stabilizing circuit unit comprising: a third connection point electrically connected to the voltage signal terminal; a fourth connection point electrically connected to the ground signal terminal; and a fifth connection point electrically connected to the second functional circuit unit through a via hole.
In some exemplary embodiments of the present disclosure, the carbon film circuit includes: the first carbon film sub-circuit comprises a first carbon film resistor arranged along the length direction of the circuit main board, and one end of the first carbon film resistor is electrically connected with an input signal connection point of the signal processing unit through a via hole; the second carbon film sub-circuit is at least partially arranged in parallel with the first carbon film sub-circuit, one end of the second carbon film sub-circuit is electrically connected with the grounding signal end through a via hole, the other end of the second carbon film sub-circuit is electrically connected with a fifth connection point of the voltage stabilizing circuit unit through a via hole, the second carbon film sub-circuit comprises a plurality of second carbon film resistors which are arranged in series along the length direction of the circuit main board, and at least one of the second carbon film resistors is a laser resistance-adjusting resistor.
In some exemplary embodiments of the present disclosure, the second carbon film resistor includes: a first resistor positioned at the end of the circuit board; a second resistor and a third resistor arranged in parallel with the first carbon film resistor, the second resistor being located between the first resistor and the third resistor; and fourth and fifth resistances between the first and second carbon film resistances; the first resistor, the second resistor, the fourth resistor, the fifth resistor and the third resistor are sequentially connected in series to form the second carbon film sub-circuit; the first resistor, the fourth resistor and the fifth resistor are set as laser resistance-adjusting resistors.
In some exemplary embodiments of the present disclosure, the first resistor is electrically connected to the ground signal terminal, and the fifth resistor is electrically connected to a fifth connection point of the voltage stabilizing circuit unit.
In some exemplary embodiments of the present disclosure, the laser resistance-adjusting resistor includes: a resistor main body; and the laser cutting part is arranged on the resistor main body and is used for adjusting the resistance value of the laser resistance-adjusting resistor.
In some exemplary embodiments of the present disclosure, the first functional circuit unit further includes: the filter circuit unit comprises a sixth connection point electrically connected with the voltage signal end and a seventh connection point electrically connected with the grounding signal end; the filter circuit unit is configured to perform a filter process on an input voltage signal.
In some exemplary embodiments of the present disclosure, the material from which the circuit board is fabricated includes one or more of ceramic, fiberglass, resin, metal oxide, polytetrafluoroethylene, polyimide.
According to the embodiment of the disclosure, the at least one laser resistance adjusting resistor is arranged in the carbon film circuit included in the second functional circuit unit, so that the resistance proportional relation in the carbon film circuit in the circuit board of the disc brake displacement sensor can be effectively adjusted, the requirement of an output signal is met, and the disc brake displacement sensor can acquire the output signal more accurately.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the scope of the disclosure as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.
FIG. 1A is a schematic perspective view of a circuit board for a disc brake displacement sensor according to some exemplary embodiments of the present disclosure;
FIG. 1B is a schematic perspective view of another view of a circuit board for a disc brake displacement sensor according to some exemplary embodiments of the present disclosure;
FIG. 2 is a front view of a circuit board for a disc brake displacement sensor in accordance with some exemplary embodiments of the present disclosure;
FIG. 3 is a rear view of a circuit board for a disc brake displacement sensor in accordance with some exemplary embodiments of the present disclosure;
fig. 4 is a schematic diagram of a laser resistance-modifying resistor for a circuit board of a disc brake displacement sensor according to some exemplary embodiments of the present disclosure.
Detailed Description
For the purposes of clarity, technical solutions and advantages of embodiments of the present disclosure, the following drawings and detailed description will clearly illustrate the spirit of the disclosure, and any person skilled in the art, after having the knowledge of the embodiments of the present disclosure, may make changes and modifications by the techniques taught by the present disclosure, without departing from the spirit and scope of the present disclosure.
The exemplary embodiments of the present disclosure and their description are intended to explain the present disclosure and are not intended to be limiting of the present disclosure. In addition, the same or similar reference numerals are used for the same or similar parts in the drawings and the embodiments.
The terms "first," "second," …, etc. as used herein, do not denote a particular order or sequence, nor are they intended to limit the disclosure, but rather are merely intended to distinguish one element or operation from another in the same technical term.
With respect to directional terms used herein, for example: upper, lower, left, right, front or rear, etc., are merely references to the directions of the drawings. Thus, directional terminology is used for purposes of illustration and is not intended to be limiting.
As used herein, the terms "comprising," "including," "having," "containing," and the like are intended to be inclusive and mean an inclusion, but not limited to.
As used herein, "and/or" includes any or all combinations of such things.
Reference herein to "a plurality" includes "two" and "more than two"; the term "plurality of sets" as used herein includes "two sets" and "more than two sets".
The terms "about," "approximately" and the like as used herein are used to modify any quantitative or positional deviation that could vary slightly without such slight variation or positional deviation altering its nature. In general, the range of slight variations or errors modified by such terms may be 20% in some embodiments, 10% in some embodiments, 5% in some embodiments, or other values. It should be understood by those skilled in the art that the above mentioned values can be adjusted according to the actual requirements, and are not limited thereto.
All terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise defined. It should be noted that the terms used herein should be construed to have meanings consistent with the context of the present specification and should not be construed in an idealized or overly formal manner.
Where expressions like at least one of "A, B and C, etc. are used, the expressions should generally be interpreted in accordance with the meaning as commonly understood by those skilled in the art (e.g.," a system having at least one of A, B and C "shall include, but not be limited to, a system having a alone, B alone, C alone, a and B together, a and C together, B and C together, and/or A, B, C together, etc.).
It should also be appreciated by those skilled in the art that virtually any disjunctive word and/or phrase presenting two or more alternative items, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the items, either of the items, or both. For example, the phrase "a or B" should be understood to include the possibility of "a" or "B", or "a and B".
Fig. 1A is a schematic perspective view of a circuit board for a disc brake displacement sensor according to some exemplary embodiments of the present disclosure. Fig. 1B is a perspective schematic view of another view of a circuit board for a disc brake displacement sensor according to some exemplary embodiments of the present disclosure. Fig. 2 is a front view of a circuit board for a disc brake displacement sensor according to some exemplary embodiments of the present disclosure. Fig. 3 is a rear view of a circuit board for a disc brake displacement sensor according to some exemplary embodiments of the present disclosure. Fig. 4 is a schematic diagram of a laser resistance-modifying resistor for a circuit board of a disc brake displacement sensor according to some exemplary embodiments of the present disclosure.
The structure of the circuit board for the disc brake displacement sensor according to the embodiment of the present disclosure is described in detail with reference to fig. 1A to 4.
As shown in fig. 1A to 3, a circuit board 100 for a disc brake displacement sensor includes a circuit main board 10 and a functional circuit unit. The circuit board comprises a first surface and a second surface which are oppositely arranged, as shown in fig. 1A and 1B, namely, two surfaces A and B which are oppositely arranged of the circuit board, wherein the surface A is the first surface, and the surface B is the second surface.
Illustratively, the materials from which the circuit board is fabricated include one or more of oxygen ceramics, fiberglass, resins, metals, metal oxides, polytetrafluoroethylene, polyimide. For example, the ceramic comprises aluminum oxide ceramic, and the aluminum oxide ceramic is adopted to prepare the circuit main board, so that the main board has good high-temperature resistance and low-temperature resistance, and has higher strength.
In some alternative embodiments, the material from which the circuit board is made comprises fiberglass, which is formed by high temperature melting of inorganic material, cooling and converging into an amorphous hard material, and interweaving warp and weft yarns. For example, a circuit board is formed by thermally curing a resin material such as epoxy resin and bonding the resin material to copper foil, aluminum foil, glass fiber, or the like. For another example, the circuit board is formed by an aluminum substrate, a copper sheet, and an insulating layer.
In other alternative embodiments, the material from which the circuit board is fabricated comprises one of polytetrafluoroethylene, polyimide. Specifically, the material from which the circuit board is made may be copper foil, an insulating material, and an adhesive, and polytetrafluoroethylene or polyimide in the insulating material is bonded to the copper foil by the adhesive to form the circuit board.
The functional circuit unit is used for realizing the functions required by the displacement sensor of the disc brake.
In some exemplary embodiments, as shown in fig. 1A and 1B, the functional circuit unit includes a first functional circuit unit 11 disposed on a first surface and a second functional circuit unit 12 disposed on a second surface, the first functional circuit unit 11 being electrically connected to the second functional circuit unit 12 through at least one via penetrating a circuit board.
In some embodiments of the present disclosure, the second functional circuit unit includes a carbon film circuit including a plurality of carbon film resistors disposed in series along a length direction of the circuit board, the carbon film resistors including at least one laser resistance-adjusting resistor. The laser resistor trimming resistor can trim the resistor material on the film resistor by laser in the manufacturing process, thereby realizing precise trimming of the resistor and meeting the requirement of specific resistance proportional relation in a carbon film circuit.
As shown in fig. 1A to 3, the first surface (surface a) is further provided with a ground signal terminal GND, a voltage signal terminal VCC, and an output signal terminal OUT. The ground signal terminal GND is used for accessing a low level terminal of the signal, the voltage signal terminal VCC is used for accessing a high level terminal of the signal, and the output signal terminal OUT is used for outputting the signal, and the signal processed by the processing unit is outputted.
As shown in fig. 1A, the ground signal terminal GND, the voltage signal terminal VCC and the output signal terminal OUT are configured as sheet-like contact terminals, for example, all of which are provided with a certain length and parallel to each other, so as to facilitate contact-type electrical connection with other circuits or elements.
As shown in fig. 1A and 2, the first functional circuit unit 11 includes a signal processing unit 111, a voltage stabilizing circuit unit 112, and a filter circuit unit 113, see in particular, a portion in broken lines in fig. 2.
The signal processing unit 111 includes: a first connection point A1 electrically connected to the voltage signal terminal VCC; a second connection point A2 electrically connected to the ground signal terminal; an input signal connection point Ain electrically connected to the second functional circuit unit 12 through the via K1; and an output signal connection point Aout electrically connected to the output signal terminal.
The signal processing unit 111 is configured to receive an input signal generated by the carbon film circuit in the second functional circuit unit 12 and convert the input signal into an output signal. For example, the signal processing unit 111 is electrically connected to the carbon film circuit through the input signal connection point Ain, and the carbon film circuit converts the input signal into the output signal after inputting the signal into the signal processing unit 111, and the signal processing unit 111 outputs the output signal to the output signal terminal OUT through the output signal connection point Aout and finally outputs to other components, for example, to the displacement sensor of the disc brake.
The voltage stabilizing circuit unit 112 includes: a third connection point A3 electrically connected to the voltage signal terminal VCC; a fourth connection point A4 electrically connected to the ground signal terminal GND; and a fifth connection point A5 electrically connected to the second functional circuit unit 12 through the via hole K2.
For example, the fifth connection point A5 of the voltage stabilizing circuit unit 112 is electrically connected to the carbon film circuit 20 through the via K2.
The filter circuit unit 113 includes a sixth connection point A6 electrically connected to the voltage signal terminal VCC, and a seventh connection point A7 electrically connected to the ground signal terminal.
The filter circuit unit 113 is configured to perform a filter process on the input voltage signal, thereby avoiding that an interference signal is present in the input voltage signal to affect an input signal of the carbon film circuit to the signal processing unit.
As shown in fig. 1B and 3, the second functional circuit unit 12 includes a carbon film circuit 20.
The carbon film circuit 20 includes a first carbon film sub-circuit 21 and a second carbon film sub-circuit 22.
The first carbon film sub-circuit 21 includes a first carbon film resistor provided along the longitudinal direction of the circuit board 10, and one end of the first carbon film resistor is electrically connected to the input signal connection point Ain of the signal processing unit through the via K1.
The second carbon film sub-circuit 22 is provided at least partially in parallel with the first carbon film sub-circuit 21. For example, the middle portion of the second carbon film sub-circuit 22 is disposed parallel to the first carbon film sub-circuit 21, and the other portion may not be parallel to the first carbon film sub-circuit 21.
One end of the second carbon film sub-circuit 22 is electrically connected to the ground signal end GND through the via hole K3, and the other end is electrically connected to the fifth connection point A5 of the voltage stabilizing circuit unit through the via hole K2. In this embodiment, one end and the other end do not refer to opposite ends, for example, one end connected to the via K3 is located on the side near the end of the circuit board, and the other end connected to the via K2 is located on the side near the middle of the circuit board.
The second carbon film sub-circuit 22 includes a plurality of second carbon film resistors disposed in series along the length direction of the circuit board, at least one of the second carbon film resistors being a laser resistance-adjusting resistor.
As shown in fig. 3, the second carbon film resistance includes: a first resistor 221 located at an end of the circuit board; and a second resistor 222 and a third resistor 223 disposed in parallel with the first carbon film resistor, the second resistor 222 being located between the first resistor 221 and the third resistor 223. For example, the first resistor 221, the second resistor 222, and the third resistor 223 are provided in this order from one end of the circuit board to the opposite end of the circuit board in the longitudinal direction of the circuit board.
In some specific embodiments, the second resistor 222 may include, for example, a first sub-resistor 2221 and a second sub-resistor 2222, where the first sub-resistor 2221 and the second sub-resistor 2222 may be electrically connected in series.
As shown in fig. 3, the second carbon film resistance includes: a fourth resistor 224 and a fifth resistor 225 located between the first carbon film resistor and the second resistor 222.
The first resistor 221, the second resistor 222, the fourth resistor 224, the fifth resistor 225 and the third resistor 223 are sequentially connected in series to form a second carbon film sub-circuit. The first resistor 221, the fourth resistor 224, and the fifth resistor 225 are set as laser resistance-adjusting resistors.
The first resistor 221 is electrically connected to the ground signal terminal GND, for example, the first resistor 221 is electrically connected to the ground signal terminal GND through the via K3.
The fifth resistor 225 is electrically connected to the fifth connection point of the voltage stabilizing circuit unit, for example, the fifth resistor is electrically connected to the fifth connection point A5 through the via K2.
As shown in fig. 4, the laser resistor 300 includes a resistor body 310, and the resistor body 310 is electrically connected to the high level and the low level of the circuit through a resistor first terminal 311 and a resistor second terminal 312, respectively. The resistor main body 310 is provided with a laser cutting portion 311, and the laser cutting portion 311 is used for adjusting the resistance value of the laser resistor.
For example, when the resistance of the resistor main body 310 of the laser resistor 300 is high, the laser beam is focused on the resistor main body 310 to gasify the resistor material, thereby forming the laser cut portion 111, and when the laser cut portion is formed, the resistance of the entire resistor main body 310 is changed, thereby realizing accurate adjustment of the resistance of the resistor main body 310.
According to the embodiment of the disclosure, the at least one laser resistance adjusting resistor is arranged in the carbon film circuit included in the second functional circuit unit, so that the resistance proportional relation in the carbon film circuit in the circuit board of the disc brake displacement sensor can be effectively adjusted, the requirement of an output signal is met, and the disc brake displacement sensor can acquire the output signal more accurately.
Those skilled in the art will appreciate that the features recited in the various embodiments of the disclosure and/or in the claims may be provided in a variety of combinations and/or combinations, even if such combinations or combinations are not explicitly recited in the disclosure. In particular, the features recited in the various embodiments of the present disclosure and/or the claims may be variously combined and/or combined without departing from the spirit and teachings of the present disclosure. All such combinations and/or combinations fall within the scope of the present disclosure.
The embodiments of the present disclosure are described above. However, these examples are for illustrative purposes only and are not intended to limit the scope of the present disclosure. Although the embodiments are described above separately, this does not mean that the measures in the embodiments cannot be used advantageously in combination. The scope of the disclosure is defined by the appended claims and equivalents thereof. Various alternatives and modifications can be made by those skilled in the art without departing from the scope of the disclosure, and such alternatives and modifications are intended to fall within the scope of the disclosure.
Claims (10)
1. A circuit board for a disc brake displacement sensor, the circuit board comprising:
the circuit main board comprises a first surface and a second surface which are oppositely arranged;
the functional circuit unit comprises a first functional circuit unit arranged on the first surface and a second functional circuit unit arranged on the second surface, and the first functional circuit unit is electrically connected with the second functional circuit unit through at least one via hole penetrating through the circuit main board;
the second functional circuit unit comprises a carbon film circuit, wherein the carbon film circuit comprises a plurality of carbon film resistors which are arranged in series along the length direction of the circuit main board, and the carbon film resistors comprise at least one laser resistance-adjusting resistor;
the first functional circuit unit includes a signal processing unit configured to receive an input signal generated by the carbon film circuit and convert the input signal into an output signal.
2. The circuit board of claim 1, wherein the first surface is further provided with a ground signal terminal, a voltage signal terminal, and an output signal terminal;
the ground signal terminal, the voltage signal terminal and the output signal terminal are configured as sheet contact terminals.
3. The circuit board of claim 2, wherein the signal processing unit comprises:
a first connection point electrically connected to the voltage signal terminal;
a second connection point electrically connected to the ground signal terminal;
an input signal connection point electrically connected to the second functional circuit unit through a via; and
and an output signal connection point electrically connected with the output signal end.
4. The circuit board of claim 3, wherein the first functional circuit unit further comprises:
a voltage stabilizing circuit unit comprising:
a third connection point electrically connected to the voltage signal terminal;
a fourth connection point electrically connected to the ground signal terminal; and
and a fifth connection point electrically connected with the second functional circuit unit through a via hole.
5. The circuit board of claim 4, wherein the carbon film circuit comprises:
the first carbon film sub-circuit comprises a first carbon film resistor arranged along the length direction of the circuit main board, and one end of the first carbon film resistor is electrically connected with an input signal connection point of the signal processing unit through a via hole;
a second carbon film sub-circuit, at least a part of which is arranged in parallel with the first carbon film sub-circuit, one end of the second carbon film sub-circuit is electrically connected with the grounding signal end through a via hole, the other end is electrically connected with a fifth connection point of the voltage stabilizing circuit unit through a via hole,
the second carbon film sub-circuit comprises a plurality of second carbon film resistors which are arranged in series along the length direction of the circuit main board, and at least one of the second carbon film resistors is a laser resistance-adjusting resistor.
6. The circuit board of claim 5, wherein the circuit board is further configured to,
the second carbon film resistor includes:
a first resistor positioned at the end of the circuit board;
a second resistor and a third resistor arranged in parallel with the first carbon film resistor, the second resistor being located between the first resistor and the third resistor; and
a fourth resistor and a fifth resistor located between the first carbon film resistor and the second resistor;
the first resistor, the second resistor, the fourth resistor, the fifth resistor and the third resistor are sequentially connected in series to form the second carbon film sub-circuit;
the first resistor, the fourth resistor and the fifth resistor are set as laser resistance-adjusting resistors.
7. The circuit board of claim 6, wherein the circuit board is further configured to,
the first resistor is electrically connected with the grounding signal end, and the fifth resistor is electrically connected with a fifth connection point of the voltage stabilizing circuit unit.
8. The circuit board according to any one of claims 1 to 7, wherein,
the laser resistance-adjusting resistor comprises:
a resistor main body;
and the laser cutting part is arranged on the resistor main body and is used for adjusting the resistance value of the laser resistance-adjusting resistor.
9. The circuit board according to any one of claims 2 to 7, wherein,
the first functional circuit unit further includes:
the filter circuit unit comprises a sixth connection point electrically connected with the voltage signal end and a seventh connection point electrically connected with the grounding signal end;
the filter circuit unit is configured to perform a filter process on an input voltage signal.
10. The circuit board of any one of claims 1 to 7, wherein the material from which the circuit board is fabricated comprises one or more of ceramic, fiberglass, resin, metal oxide, polytetrafluoroethylene, polyimide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322042243.9U CN220381864U (en) | 2023-08-01 | 2023-08-01 | Circuit board for disc brake displacement sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322042243.9U CN220381864U (en) | 2023-08-01 | 2023-08-01 | Circuit board for disc brake displacement sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220381864U true CN220381864U (en) | 2024-01-23 |
Family
ID=89561323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322042243.9U Active CN220381864U (en) | 2023-08-01 | 2023-08-01 | Circuit board for disc brake displacement sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220381864U (en) |
-
2023
- 2023-08-01 CN CN202322042243.9U patent/CN220381864U/en active Active
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