CN103684391A - Capacitive noncontact vehicle switch circuit - Google Patents
Capacitive noncontact vehicle switch circuit Download PDFInfo
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- CN103684391A CN103684391A CN201310544961.4A CN201310544961A CN103684391A CN 103684391 A CN103684391 A CN 103684391A CN 201310544961 A CN201310544961 A CN 201310544961A CN 103684391 A CN103684391 A CN 103684391A
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Abstract
The invention discloses a capacitive noncontact vehicle switch circuit. The capacitive noncontact vehicle switch circuit comprises a metal sheet whose outside can be moved, a switch circuit, a voltage stabilizing circuit and a control circuit. The switch circuit is connected with the voltage stabilizing circuit and the control circuit. The voltage stabilizing circuit and the control circuit are connected. According to the capacitive noncontact vehicle switch circuit, the conduction and disconnection of a switch is controlled through capacitance change rather than a mechanical contact mode so that the problem of damage of a mechanical switch due to electric shock wearing or contact ablation can be solved, the problem of contact failure of a contact due to dust or small foreign matters can be solved, the practicality is quite high, the cost is quite low, and the installation is convenient.
Description
Technical field
The present invention relates to the contactless automotive controls circuit of a kind of condenser type, belong to vehicle switch control technology field.
Background technology
Switch is as a kind of conventional element, penetrated with in our life, on automobile, often can use big and small switch, as seat adjusting switch, front and back taillight control switch, skylight switch, dimmer opens the light etc., in these switches, be conventionally divided into push type and rotary, what regardless of the switch that is that form, use is all mechanical switch, because the power supply using on automobile is generally direct current 12V or 24V, and electric current is larger, so use mechanical switch can have following shortcoming: 1. contact can form direct-current arc closed with the moment disconnecting, after using a period of time, can damage because of the wearing and tearing of switch or the ablation of contact, 2. dust and small difference thing can cause poor contact of contacts, 3. switch contact is very responsive to water, and corrosion easily produces electrolysis.All deficiencies, cause the mechanical switch life-span short above.
Summary of the invention
(1) technical problem that will solve
In order to address the above problem, the present invention proposes the contactless automotive controls circuit of a kind of condenser type, utilize switch to move the size that exterior metal sheets changes electric capacity, reach control switch break-make, owing to there is no contact, solve situation about damaging because of switch wearing and tearing or pitting of contact, greatly extended the life-span of vehicle switch.
(2) technical scheme
A kind of condenser type of the present invention is contactless automotive controls circuit, is characterized in that: comprise switching circuit, exterior metal sheets, voltage stabilizing circuit and control circuit; Described switching circuit is connected with voltage stabilizing circuit, control circuit; Described voltage stabilizing circuit is connected with control circuit.
Further, described switching circuit comprises resistance R 1, resistance R 2, resistance R 3, field effect transistor Q2 and triode Q1; Described resistance R 1 is connected between the D utmost point and the G utmost point of field effect transistor Q2; The positive pole of the D utmost point access automobile power source of described field effect transistor Q2, and connect with resistance R 3; The S of described field effect transistor Q2 is output very, connects load circuit; The G utmost point of described field effect transistor Q2 is connected with the collector electrode of triode Q1; The emitter of described triode Q1 is connected with the negative pole of automobile power source; The base stage of described triode Q1 is connected with resistance R 2.
Further, described voltage stabilizing circuit comprises filter capacitor C2, voltage-stabiliser tube D1, integrated voltage-stabilized chip U2 and filter capacitor C1; After described filter capacitor C2 and voltage-stabiliser tube D1 parallel connection, be connected with 1 pin of integrated voltage-stabilized chip U2; Described filter capacitor C1 is connected with 3 pin of integrated voltage-stabilized chip U2; 3 pin of described integrated voltage-stabilized chip U2 are connected with control circuit.
As preferably, described control circuit is singly-bound capacitance touch induced key chip TCH01A.
(3) beneficial effect
The present invention compared with prior art, it has following beneficial effect: a kind of condenser type of the present invention is contactless automotive controls circuit, by mobile exterior metal sheets position, go to change the size of electric capacity, from face, go connection and the shutoff of control switch, rather than go to control by the mode of Mechanical Contact, solved the problem that mechanical switch damages because of electric shock wearing and tearing or pitting of contact, and dust and little foreign matter make the problems such as poor contact of contacts, possess higher practicality, and cost is lower, easy for installation.
Accompanying drawing explanation
Fig. 1 is circuit connection diagram of the present invention.
Embodiment
A kind of condenser type of the present invention is contactless automotive controls circuit, is characterized in that: comprise switching circuit, exterior metal sheets, voltage stabilizing circuit and control circuit; Described switching circuit is connected with voltage stabilizing circuit, control circuit; Described voltage stabilizing circuit is connected with control circuit.
Further, described switching circuit comprises resistance R 1, resistance R 2, resistance R 3, field effect transistor Q2 and triode Q1; Described resistance R 1 is connected between the D utmost point and the G utmost point of field effect transistor Q2; The positive pole of the D utmost point access automobile power source of described field effect transistor Q2, and connect with resistance R 3; The S of described field effect transistor Q2 is output very, connects load circuit; The G utmost point of described field effect transistor Q2 is connected with the collector electrode of triode Q1; The emitter of described triode Q1 is connected with the negative pole of automobile power source; The base stage of described triode Q1 is connected with resistance R 2.
Further, described voltage stabilizing circuit comprises filter capacitor C2, voltage-stabiliser tube D1, integrated voltage-stabilized chip U2 and filter capacitor C1; After described filter capacitor C2 and voltage-stabiliser tube D1 parallel connection, be connected with 1 pin of integrated voltage-stabilized chip U2; Described filter capacitor C1 is connected with 3 pin of integrated voltage-stabilized chip U2; 3 pin of described integrated voltage-stabilized chip U2 are connected with control circuit.
As preferably, described control circuit is singly-bound capacitance touch induced key chip TCH01A.
Circuit theory is as follows:
L3 connects power supply on vehicle positive pole, L2 is control output end, little is power supply on vehicle negative pole, is generally connected with car body, and field effect transistor Q2 is large electric current P-channel field-effect transistor (PEFT) pipe, resistance R 1 one termination positive sources, one end is connected with the G utmost point of Q2, in situation at ordinary times, because the G utmost point of Q2 is in high potential state, therefore Q2 ends, and is equivalent to the "Off" state of standard machinery switch.
Electric current is through resistance R 3, and after voltage-stabiliser tube D1 voltage stabilizing for the first time, by integrated voltage-stabilized chip U2, carry out voltage stabilizing for the second time again, the direct current of stable output is supplied with singly-bound capacitance touch induced key chip TCH01A work, capacitor C 2 and 1 filtering of capacitor C and Anti-Jamming.
The effect of singly-bound capacitance touch induced key chip TCH01A is that the variation by inductance capacitance changes output pin low and high level, M is the capacitive sensing end of singly-bound capacitance touch induced key chip TCH01A, when exterior metal sheets is during in A position, due to the distance of exterior metal sheets from induction end M, therefore electric capacity is little, singly-bound capacitance touch induced key chip TCH01A the 1st pin is output as low level, triode Q1 base voltage is 0 volt, triode Q1 is in cut-off state, and effect pipe Q2 is in cut-off state, when exterior metal sheets A moves to position B by outside toggle switch, due to exterior metal sheets and capacitive sensing end M near distance, therefore electric capacity has increased manyfold, singly-bound capacitance touch induced key chip TCH01A the 1st pin is just exported high level, high level signal makes triode Q1 conducting by resistance R 2, make the G utmost point of Q2 in low level, thereby make effect pipe Q2 conducting, because large electric current P-channel field-effect transistor (PEFT) pipe Q2 conducting resistance is extremely low, thereby make the voltage between L1 power cathode and L2 output be substantially equal to supply voltage, thereby make load obtain electric work, this is equivalent to the "On" state of standard machinery switch.
A kind of condenser type of the present invention is contactless automotive controls circuit, by mobile exterior metal sheets position, go to change the size of electric capacity, from face, go connection and the shutoff of control switch, rather than go to control by the mode of Mechanical Contact, solved the problem that mechanical switch damages because of electric shock wearing and tearing or pitting of contact, and dust and little foreign matter make the problems such as poor contact of contacts, possess higher practicality, and cost is lower, easy for installation.
Embodiment recited above is described the preferred embodiment of the present invention, not the spirit and scope of the present invention is limited.Do not departing under the prerequisite of design concept of the present invention; various modification and improvement that this area ordinary person makes technical scheme of the present invention; all should drop into protection scope of the present invention, the technology contents that the present invention asks for protection, is all documented in claims.
Claims (6)
1. the contactless automotive controls circuit of condenser type, is characterized in that: comprise outside movably sheet metal, switching circuit, voltage stabilizing circuit and control circuit; Described switching circuit is connected with voltage stabilizing circuit, control circuit; Described voltage stabilizing circuit is connected with control circuit.
2. the contactless automotive controls circuit of a kind of condenser type according to claim 1, is characterized in that: described switching circuit comprises resistance R 1, resistance R 2, resistance R 3, field effect transistor Q2 and triode Q1; Described resistance R 1 is connected between the D utmost point and the G utmost point of field effect transistor Q2; The positive pole of the D utmost point access automobile power source of described field effect transistor Q2, and connect with resistance R 3; The S of described field effect transistor Q2 is output very, connects load circuit; The G utmost point of described field effect transistor Q2 is connected with the collector electrode of triode Q1; The emitter of described triode Q1 is connected with the negative pole of automobile power source; The base stage of described triode Q1 is connected with resistance R 2.
3. the contactless automotive controls circuit of a kind of condenser type according to claim 1, is characterized in that: described voltage stabilizing circuit comprises filter capacitor C2, voltage-stabiliser tube D1, integrated voltage-stabilized chip U2 and filter capacitor C1; After described filter capacitor C2 and voltage-stabiliser tube D1 parallel connection, be connected with 1 pin of integrated voltage-stabilized chip U2; Described filter capacitor C1 is connected with 3 pin of integrated voltage-stabilized chip U2; 3 pin of described integrated voltage-stabilized chip U2 are connected with control circuit.
4. the contactless automotive controls circuit of a kind of condenser type according to claim 1, is characterized in that: described control circuit is singly-bound capacitance touch induced key chip TCH01A.
5. the contactless automotive controls circuit of a kind of condenser type according to claim 1, is characterized in that: for changing the removable sheet metal in outside of capacitance size.
6. the contactless automotive controls circuit of a kind of condenser type according to claim 1, is characterized in that: working control current switching be field effect transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310544961.4A CN103684391A (en) | 2013-11-02 | 2013-11-02 | Capacitive noncontact vehicle switch circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310544961.4A CN103684391A (en) | 2013-11-02 | 2013-11-02 | Capacitive noncontact vehicle switch circuit |
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| CN103684391A true CN103684391A (en) | 2014-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310544961.4A Pending CN103684391A (en) | 2013-11-02 | 2013-11-02 | Capacitive noncontact vehicle switch circuit |
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| CN (1) | CN103684391A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110371094A (en) * | 2019-06-19 | 2019-10-25 | 浙江零跑科技有限公司 | A kind of mounting structure of condenser type braking light switch and foot pedal assembly |
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2013
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| CN201438722U (en) * | 2009-07-17 | 2010-04-14 | 深圳创维数字技术股份有限公司 | Set-top box |
| CN202121566U (en) * | 2011-03-10 | 2012-01-18 | 吴勃生 | Human body inductive control switch of low voltage aquarium |
| CN202094865U (en) * | 2011-04-06 | 2011-12-28 | 深圳市阿达电子有限公司 | Energy-saving single wire system single/multiple capacitive sensing type touch switch |
| CN102208936A (en) * | 2011-05-27 | 2011-10-05 | 杭州电子科技大学 | Self-contained iridium satellite data multipath transmission terminal device |
| CN203104719U (en) * | 2013-01-31 | 2013-07-31 | 广州瀚诚电子产品有限公司 | Sensing microphone |
| CN203563046U (en) * | 2013-11-02 | 2014-04-23 | 宁波市镇海匡正电子科技有限公司 | Switch circuit used for capacitive noncontact vehicle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110371094A (en) * | 2019-06-19 | 2019-10-25 | 浙江零跑科技有限公司 | A kind of mounting structure of condenser type braking light switch and foot pedal assembly |
| CN110371094B (en) * | 2019-06-19 | 2020-07-07 | 浙江零跑科技有限公司 | Mounting structure of capacitive brake lamp switch and pedal assembly |
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Addressee: NINGBO ZHENHAI CALLCHING ELECTRIC TECHNOLOGY CO., LTD. Document name: Notification of Patent Invention Entering into Substantive Examination Stage |
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Application publication date: 20140326 |
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