CN108168903A - A kind of wear monitoring circuit - Google Patents
A kind of wear monitoring circuit Download PDFInfo
- Publication number
- CN108168903A CN108168903A CN201711349671.9A CN201711349671A CN108168903A CN 108168903 A CN108168903 A CN 108168903A CN 201711349671 A CN201711349671 A CN 201711349671A CN 108168903 A CN108168903 A CN 108168903A
- Authority
- CN
- China
- Prior art keywords
- capacitance
- circuit
- multivibrator
- wear
- output signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
- G01N27/228—Circuits therefor
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- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention discloses a kind of wear monitoring circuits, include the electronic circuit of a capacitance-sensitive, it is fixed on a component of wear indicator, the electronic circuit mainly include an oscillator, by a symmetrical pulse signal be sent to two one-shot multivibrators with；Multivibrator is connect respectively with resistance R1 and R2 and capacitance C1 and C2, multivibrator with output signal synthesized by logical AND gate；The output signal of door is sent to transistor, terminal and is connect with a power supply, and therefore this power changes with time is adjusted by transistor；The energy received from power supply by circuit, by a diode in an input capacitor by circuit storage, capacitor is connected to a low-pass filter, its task is to circuit element send a voltage vcc being adjusted.The present invention can learn brake wear situation, high brake security performance in advance.
Description
Technical field
The present invention relates to a kind of brakes, and in particular to a kind of brake wear monitoring circuit.
Background technology
The method of vehicle brake periodic detection repair has obtained widest application at present.When automobilism certain period
Or after running to certain mileage number, it is necessary to the Measuring error of automotive performance and key components and parts is carried out, to ensure automobile
The safety of traveling.The main shortcoming of this method is exactly other than periodic maintenance detection time, and driver usually not realizes
Go to detect the performance and health degree of these components.Brake bush is one of most critical component of vehicle safety travel, such as
Fruit cannot understand its degree of wear in time, be likely to result in immeasurable loss.At present, about brake friction pad wear journey
There are two types of method, a kind of method uses most intuitive periodic detection method for maintaining for the detection of degree, and another kind is used based on circuit
Limit detection method.
Invention content
In view of the above existing problems in the prior art, the present invention provides a kind of wear monitoring circuits, precisely perceive abrasion feelings
Condition improves equipment safety performance.
The technical scheme is that be accomplished by the following way：A kind of wear monitoring circuit, including a capacitance-sensitive
Electronic circuit, it is fixed on a component of wear indicator, the electronic circuit mainly include an oscillator, by one
Symmetrical pulse signal be sent to two one-shot multivibrators with；Multivibrator respectively with resistance R1 and R2 and capacitance C1
Connected with C2, multivibrator with output signal synthesized by logical AND gate；The output signal of door is sent to transistor, terminal and
It is connect with a power supply, therefore this power changes with time is adjusted by transistor；The energy received from power supply by circuit
Amount, by a diode in an input capacitor by circuit storage, capacitor is connected to a low-pass filter, it
Task is to send a voltage vcc being adjusted to the element of circuit.
Further, monitoring arrangement further includes a microprocessor.For using as transmitted by the variable value of capacitance C1
Information.
Further, capacitance C1 and capacitance C2 is reference capacitor.
This circuit can generate one and adjust at any time with the variation of the value of the capacitance formed between the electrode of sensor
Signal, as an output signal.The signal that time change adjusts, there are one hold for the pulse generated by multivibrator 2
The continuous time, it represents the value of capacitance C1 and is used as a benchmark by the pulse that multivibrator 3 generates, it makes it possible to especially
Its remove existing for parasitic capacitance and at any time or drift of the variation of temperature in electronic component.It therefore can be more smart
Standard perceives abrasion condition, improves equipment safety performance.
Description of the drawings
Fig. 1 is circuit diagram of the present invention.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
As shown in Figure 1, a kind of wear monitoring circuit, includes the electronic circuit of a capacitance-sensitive, it is fixed on abrasion instruction
On one component of device, the electronic circuit mainly include an oscillator 1, by a symmetrical pulse signal be sent to two it is monostable
State multivibrator 2 and 3；Multivibrator is connect respectively with resistance R1 and R2 and capacitance C1 and C2, multivibrator 2 and 3
Output signal synthesized by logical AND gate 4；The output signal of door 4 is sent to transistor 5, and terminal 6 and 7 is connect with a power supply 8,
Therefore this power changes with time is adjusted by transistor 5；The energy received from power supply 8 by circuit, passes through one two
For pole pipe 9 by circuit storage in an input capacitor 10, capacitor 10 is connected to a low-pass filter 11, its task is to
A voltage vcc being adjusted is sent to the element of circuit.
Further, monitoring arrangement further includes a microprocessor 12.For using as transmitted by the variable value of capacitance C1
Information.
Further, capacitance C1 and capacitance C2 is reference capacitor.
This circuit can generate one and adjust at any time with the variation of the value of the capacitance formed between the electrode of sensor
Signal, as an output signal.The signal that time change adjusts, there are one hold for the pulse generated by multivibrator 2
The continuous time, it represents the value of capacitance C1 and is used as a benchmark by the pulse that multivibrator 3 generates, it makes it possible to especially
Its remove existing for parasitic capacitance and at any time or drift of the variation of temperature in electronic component.It therefore can be more smart
Standard perceives abrasion condition, improves equipment safety performance.
Claims (3)
1. a kind of wear monitoring circuit, which is characterized in that include the electronic circuit of a capacitance-sensitive, it is fixed on wear indicator
A component on, the electronic circuit mainly include an oscillator, a symmetrical pulse signal is sent to two monostables
Multivibrator with；Multivibrator is connect respectively with resistance R1 and R2 and capacitance C1 and C2, multivibrator and output
Signal is synthesized by logical AND gate；The output signal of door is sent to transistor, terminal and is connect with a power supply, this power is therefore
It changes with time and is adjusted by transistor；The energy received from power supply by circuit, by a diode in an input
By circuit storage in capacitor, capacitor is connected to a low-pass filter, and its task is to the element of circuit is given to send one
The voltage vcc being adjusted.
2. wear monitoring circuit according to claim 1, which is characterized in that monitoring arrangement further includes a microprocessor.
For using as the information transmitted by the variable value of capacitance C1.
3. wear monitoring circuit according to claim 2, which is characterized in that capacitance C1 and capacitance C2 is reference capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711349671.9A CN108168903A (en) | 2017-12-15 | 2017-12-15 | A kind of wear monitoring circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711349671.9A CN108168903A (en) | 2017-12-15 | 2017-12-15 | A kind of wear monitoring circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108168903A true CN108168903A (en) | 2018-06-15 |
Family
ID=62522297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711349671.9A Pending CN108168903A (en) | 2017-12-15 | 2017-12-15 | A kind of wear monitoring circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108168903A (en) |
-
2017
- 2017-12-15 CN CN201711349671.9A patent/CN108168903A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180615 |