CN112096856A - Shifter circuit and shifter - Google Patents

Abstract

The invention provides a shifter circuit which comprises an infrared transmitting unit, an infrared receiving unit, an M signal output unit, an M + signal output unit and an M-signal output unit, wherein the infrared transmitting unit is used for transmitting an infrared signal; the infrared receiving unit is used for receiving the infrared signal transmitted by the infrared transmitting unit; the M signal output unit is used for outputting an M signal to realize the manual gear control of the automobile; the M + signal output unit is used for outputting an M + signal, and is matched with the M signal to realize manual gear-up of the automobile; the M-signal output unit is used for outputting an M-signal and is matched with the M-signal to realize manual gear shifting of an automobile, the problem that M, M + and M-signal output is easily caused when an existing manual-automatic integrated gear shifter is used for achieving M, M + and M-signal output through a switch Hall chip is solved, logical output of M, M + and M-signals is achieved through an infrared transmitting head and two infrared receiving heads, signal output is accurate, and electromagnetic interference and structural errors have small influence on the signal output.

Description

Shifter circuit and shifter

technical field

The invention relates to the technical field of automobile control, in particular to a shifter circuit based on an infrared light sensor.

Background technique

At present, among the shifters that are self-contained in the market, the output of M, M+, and M- signals is generally realized by switching the Hall chip. The switching Hall chip has high accuracy on the magnetic field, position and structure of the Hall. requirements, it is easy to cause no signal output or signal output error.

SUMMARY OF THE INVENTION

The shifter circuit disclosed by the invention solves the problem that no signal output or wrong signal output is likely to occur when the existing manual-integrated shifter realizes M, M+ and M- signal output by switching the Hall chip. Through one infrared transmitting head and two infrared receiving heads, the logic output of M, M+ and M- signals is realized. The signal output is accurate and the electromagnetic interference and structural error have little influence on it.

In order to achieve the above object, the technical scheme of the present invention is specifically realized in this way:

One aspect of the present invention discloses a shifter circuit, which includes an infrared transmitting unit, an infrared receiving unit, an M signal output unit, an M+ signal output unit and an M- signal output unit, wherein the infrared transmitting unit is used to transmit infrared signals; The unit is used to receive the infrared signal emitted by the infrared emission unit; the M signal output unit is used to output the M signal to realize the manual transmission control of the automobile; the M+ signal output unit is used to output the M+ signal, and cooperate with the M signal to realize the automobile Manual upshift; M-signal output unit, used to output M-signal, and cooperate with the M-signal to realize manual downshift of the car.

Further, in the infrared emitting unit, the cathode of the infrared emitting head is grounded, and the anode of the infrared emitting head is connected to the VCC terminal of the power supply through the parallel resistors R1, R2 and R3.

Further, the infrared receiving unit includes a first infrared receiving head Q1 and a second infrared receiving head Q2, and the light-receiving surface of the first infrared receiving head Q1 is used to receive the infrared signal emitted by the infrared transmitting unit, so The emitter of the first infrared receiving head Q1 is grounded, the collector of the first infrared receiving head Q1 is connected to the power supply VCC terminal through the resistor R4, and the collector of the first infrared receiving head Q1 is grounded through the capacitor C1, so the The sensor_M+ terminal is set between the resistor R4 and the capacitor C1; the light-receiving surface of the second infrared receiving head is used to receive the infrared signal emitted by the infrared transmitting unit, and the emitter of the second infrared receiving head Q2 is grounded, so The collector of the second infrared receiving head Q2 is connected to the VCC terminal of the power supply through the resistor R5, and at the same time, the collector of the second infrared receiving head Q2 is grounded through the capacitor C2, and the resistor R5 and the capacitor C2 are set as the Sensor_M-terminal .

Further, in the described M signal output unit, the Sensor_M+ end in the infrared receiving unit is connected to the first pin of the OR gate D9, and the Sensor_M- end in the infrared receiving unit is connected to the second pin of the OR gate D9, The third pin of the OR gate is connected to the base of the first triode Q5, the emitter of the first triode Q5 is grounded, and the collector of the first triode Q5 is connected to the fuse F3 and the capacitor C9. Grounding, the base of the first transistor Q5 is grounded through the capacitor C10, and at the same time, the base of the first transistor Q5 is grounded through the resistor R7, and the fuse F3 and the capacitor C9 are set to output M signal output terminal M_Output.

Further, in the M+ signal output unit, the base of the second transistor Q7 is connected to the Sensor_M- terminal through the resistor R12, and the base of the second transistor Q7 is connected to the cathode of the first diode D6, The collector of the second transistor Q7 is grounded through the resistor R14, the emitter of the second transistor Q7 is connected to the Sensor_M+ terminal, the base of the third transistor Q3 is grounded through the capacitor C11, and the third transistor Q3 is connected to the ground through the capacitor C11. The emitter of the transistor Q3 is grounded, the collector of the third transistor Q3 is grounded through the fuse F1 and the capacitor C3, and the output terminal M+_Output of the M+ signal is set between the fuse F1 and the capacitor C3.

Further, in the M-signal output unit, the base of the fifth transistor Q6 is connected to the Sensor_M+ terminal through the resistor R11, and the base of the fifth transistor Q6 is connected to the cathode of the second diode D2, The collector of the fifth transistor Q6 is grounded through the resistor R13, the emitter of the fifth transistor Q6 is connected to the Sensor_M- terminal, the base of the fourth transistor Q4 is grounded through the capacitor C12, and the fourth transistor Q4 is grounded through the capacitor C12. The emitter of the transistor Q4 is grounded, the collector of the fourth transistor Q4 is grounded through the fuse F2 and the capacitor C4, and the output terminal M-_Output of the M-signal is set between the fuse F2 and the capacitor C4.

Further, the model of the infrared emitting head is SFH4244.

Further, the models of the first receiving head and the second receiving head are SFH325.

Another aspect of the present invention discloses a shifter including any of the above-mentioned shifter circuits.

Beneficial technical effects:

1. The present invention discloses a shifter circuit, comprising an infrared transmitting unit, an infrared receiving unit, an M signal output unit, an M+ signal output unit and an M- signal output unit, wherein the infrared transmitting unit is used to transmit infrared signals; The unit is used to receive the infrared signal emitted by the infrared emission unit; the M signal output unit is used to output the M signal to realize the manual transmission control of the automobile; the M+ signal output unit is used to output the M+ signal, and cooperate with the M signal to realize the automobile Manual upshift; M-signal output unit, used to output M-signal, and cooperate with the M signal to realize manual downshift of the car, which solves the problem that the existing manual shifter can realize M, M+ by switching the Hall chip. When the M- and M- signals are output, it is easy to have the problem of no signal output or wrong signal output. Through one infrared transmitter and two infrared receivers, the logic output of M, M+ and M- signals is realized, and the signal output is accurate and electromagnetic interference. Structural error has little influence on it;

2. In the present invention, one infrared transmitting head and two infrared receiving heads are used to realize the output of M signal, M+ signal and M- signal, the circuit structure is simple, and the production cost is reduced.

Description of drawings

In order to illustrate the technical solutions of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments.

1 is a specific circuit structure diagram of an infrared emission unit in a shifter circuit according to the present invention;

2 is a specific circuit structure diagram of an infrared receiving unit in a shifter circuit according to the present invention;

3 is a specific circuit structure diagram of an M signal output unit in a shifter circuit according to the present invention;

4 is a specific circuit structure diagram of an M+ signal output unit in a shifter circuit according to the present invention;

FIG. 5 is a specific circuit structure diagram of an M-signal output unit in a shifter circuit according to the present invention.

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, only used to explain the present invention, and should not be construed as a limitation of the present invention.

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

First of all, it should be noted that, in order to avoid the intersection of the connection lines in the circuit structure diagram, the present application adopts the form of mark, and the same mark symbol represents the same connection point.

One aspect of the present invention discloses a shifter circuit. Referring to FIGS. 1-5 , the shifter circuit includes an infrared transmitting unit, an infrared receiving unit, an M signal output unit, an M+ signal output unit and an M- signal output unit, wherein, The infrared transmitting unit is used to transmit infrared signals; the infrared receiving unit is used to receive the infrared signals emitted by the infrared transmitting unit; the M signal output unit is used to output the M signal to realize the manual transmission control of the automobile; the M+ signal output unit is used to output the M+ signal, Cooperate with the M signal to realize the manual upshift of the automobile; the M-signal output unit is used to output the M-signal, and cooperate with the M signal to realize the manual downshift of the automobile, which solves the problem of the existing manual shifter. When the M, M+ and M- signal output is realized by switching the Hall chip, it is easy to have the problem of no signal output or signal output error. Through one infrared transmitter and two infrared receivers, the logic of M, M+ and M- signals is realized. Output, signal output is accurate and electromagnetic interference and structural errors have little influence on it.

As an embodiment of the present invention, the infrared transmitting unit includes an infrared transmitting head for transmitting infrared signals, the cathode of the infrared transmitting head is grounded, and the anode of the infrared transmitting head is connected to the VCC terminal of the power supply through the parallel resistors R1, R2 and R3, The resistors R1, R2 and R3 provide current for the infrared emitter, preferably, the infrared emitter is SFH4244 or SFH4255.

As an embodiment of the present invention, the infrared receiving unit includes two infrared receiving heads, a first infrared receiving head Q1 and a second infrared receiving head Q2, preferably, the infrared receiving head selects SFH325, and the light receiving head of the first infrared receiving head Q1 The surface is used to receive the infrared signal emitted by the infrared transmitting unit. The emitter of the first infrared receiving head Q1 is grounded, and the collector of the first infrared receiving head Q1 is connected to the VCC terminal of the power supply through the resistor R4. At the same time, the collector of the first infrared receiving head Q1 The electrode is grounded through the capacitor C1, and the sensor_M+ terminal is set between the resistor R4 and the capacitor C1; the light-receiving surface of the second infrared receiving head is used to receive the infrared signal emitted by the infrared transmitting unit, the emitter of the second infrared receiving head Q2 is grounded, and the second infrared receiving head Q2 is grounded. The collector of the infrared receiving head Q2 is connected to the VCC terminal of the power supply through the resistor R5, and the collector of the second infrared receiving head Q2 is grounded through the capacitor C2, and the sensor_M- terminal is set between the resistor R5 and the capacitor C2.

As an embodiment of the present invention, the M signal output unit includes an OR circuit D9 composed of two diodes in parallel, the Sensor_M+ terminal in the infrared receiving unit is connected to the first pin of the OR gate D9, and the Sensor_M in the infrared receiving unit The -terminal is connected to the second pin of the OR gate D9, the third pin of the OR gate is connected to the base of the first transistor Q5, the emitter of the first transistor Q5 is grounded, and the collector of the first transistor Q5 The fuse F3 and the capacitor C9 are grounded, the base of the first transistor Q5 is grounded through the capacitor C10, and the base of the first transistor Q5 is grounded through the resistor R7, and the M signal output is set between the fuse F3 and the capacitor C9. terminal M_Output.

As an embodiment of the present invention, in the M+ signal output unit, the base of the second transistor Q7 is connected to the Sensor_M- terminal through the resistor R12, and the base of the second transistor Q7 is connected to the cathode of the first diode D6 , the collector of the second transistor Q7 is grounded through the resistor R14, the emitter of the second transistor Q7 is connected to the Sensor_M+ terminal, the base of the third transistor Q3 is grounded through the capacitor C11, and the emitter of the third transistor Q3 The pole is grounded, the collector of the third transistor Q3 is grounded through the fuse F1 and the capacitor C3, the output terminal M+_Output of the M+ signal is set between the fuse F1 and the capacitor C3, and the resistor R12 provides the base for the second transistor Q7 current, so that the second transistor Q7 is in the switching state, the resistor R14 ensures that there is no leakage current output when the second transistor Q7 is turned off, and F1 is a recoverable fuse to avoid external short circuit causing the third transistor Q3 to burn.

As an embodiment of the present invention, in the M-signal output unit, the base of the fifth transistor Q6 is connected to the Sensor_M+ terminal through the resistor R11, and the base of the fifth transistor Q6 is connected to the cathode of the second diode D2 , the collector of the fifth transistor Q6 is grounded through the resistor R13, the emitter of the fifth transistor Q6 is connected to the Sensor_M- terminal, the base of the fourth transistor Q4 is grounded through the capacitor C12, and the The emitter is grounded, the collector of the fourth transistor Q4 is grounded through the fuse F2 and the capacitor C4, the output terminal M-_Output of the M-signal is set between the fuse F2 and the capacitor C4, and the resistor R11 provides the fifth transistor Q6 The base current keeps the fifth transistor Q6 in the switching state, the resistor R13 ensures that there is no leakage current output when the fifth transistor Q6 is turned off, and F2 is a recoverable fuse to avoid external short circuit causing the fourth transistor Q4 to burn out .

The above shifter circuit will be further described below in combination with the working principle:

The gear position signal of a shifter circuit of the present invention is active at low level.

The infrared transmitting head in the infrared transmitting unit transmits infrared signals, and the first infrared receiving head and the second infrared receiving head in the infrared receiving unit receive the infrared signals transmitted by the infrared transmitting head. When the infrared receiving head and the second infrared receiving head do not receive infrared signals, the collectors and emitters of the first infrared receiving head Q1 and the second infrared receiving head Q2 are turned off, and the Sensor_M+ terminal is connected to the VCC terminal through the resistor R4, which is a high voltage. Flat; the Sensor_M- terminal is connected to the VCC terminal through the resistor R5, which is also high level; when the infrared signal emitted by the infrared transmitter is not blocked, the light-receiving surfaces of the first infrared receiver Q1 and the second infrared receiver Q2 receive the infrared signal. , causing the collectors and emitters of the first infrared receiving head Q1 and the second infrared receiving head Q2 to be turned on, the Sensor_M+ terminal becomes a low level, and the Sensor_M- terminal also becomes a low level.

In the M signal output unit, there is an OR gate circuit D9 composed of two diodes in parallel. The OR gate circuit D9 has two input terminals and one output terminal, wherein the first input terminal is connected to the Sensor_M+ terminal, and the second input terminal is connected to Sensor_M- end, in the first infrared receiving head Q1 and the second infrared receiving head Q2, when any one of the infrared receiving heads is blocked, that is, between the Sensor_M+ end and the Sensor_M- end, as long as one of the sensor_M+ end and the Sensor_M- end is high, the OR gate circuit D9 The output terminal of the M signal outputs a high level, so that the Vbe voltage of the first NPN transistor Q5 is greater than the threshold voltage of the transistor's conduction, the first transistor Q5 is turned on, and the output terminal M_Output of the M signal outputs a low level.

When the first infrared receiving head Q1 does not receive the infrared signal, and the second receiving head Q2 receives the infrared signal, that is, when the Sensor_M+ terminal is at a high level and the Sensor_M- terminal is at a low level, the Veb voltage of the second transistor Q7 is greater than that of the PNP transistor. Turn-on threshold voltage, the second transistor Q7 is turned on, causing the voltage of the base of the third transistor Q3 to be greater than the voltage of the emitter of the third transistor Q3, the third transistor Q3 is also turned on, M+ The signal output terminal M+_Output outputs the M+ signal, low level; the Veb voltage of the fifth transistor Q6 is less than the threshold voltage of the PNP transistor, and the fifth transistor Q6 is turned off, resulting in the Vbe of the fourth transistor Q4. The voltage is lower than the threshold voltage at which the NPN transistor is turned on, so the fourth transistor Q4 is also turned off, and the output terminal M-_Output of the M-signal outputs a high-level signal.

When the first infrared receiving head Q1 receives the infrared signal and the second receiving head Q2 does not receive the infrared signal, that is, when the Sensor_M+ terminal is at a low level and the Sensor_M- terminal is at a high level, the Veb voltage of the second transistor Q7 is lower than that of the PNP transistor. Turn-on threshold voltage, the second transistor Q7 is turned off, causing the Vbe voltage of the third transistor Q3 to be less than the turn-on threshold voltage of the NPN transistor, the third transistor is also in the off state, M+ signal output terminal M +_Output outputs a high-level signal; the Vbe voltage of the fifth transistor Q6 is greater than the threshold voltage of the PNP transistor conducting, and the fifth transistor Q6 is conducting, resulting in the Vbe voltage of the fourth transistor Q4 being greater than the NPN transistor conducting When the threshold voltage is turned on, the fourth transistor Q4 is also turned on, and the output terminal M-_Output of the M-signal outputs a low-level signal.

Table 1 shows the output states of the M, M+ and M- signals when the first infrared receiving head Q1 and the second infrared receiving head Q2 are in different states.

Table 1:

The first infrared receiver Q1 deadline turn on turn on deadline The second infrared receiver Q2 turn on turn on deadline deadline M low level high level low level low level M+ low level high level high level high level M- high level high level low level high level

Another aspect of the present invention discloses a shifter including the shifter circuit as described above.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above embodiments are only to describe the preferred embodiments of the present invention, and do not limit the scope of the present invention. Variations and improvements should fall within the protection scope determined by the claims of the present invention.

Claims (9)

1. A shifter circuit, characterized in that, comprising: Infrared transmitting unit, used to transmit infrared signal; an infrared receiving unit for receiving the infrared signal emitted by the infrared transmitting unit; The M signal output unit is used to output the M signal to realize the manual transmission control of the car; The M+ signal output unit is used to output the M+ signal, and cooperate with the M signal to realize the manual upshift of the car; The M-signal output unit is used for outputting the M-signal, and cooperates with the M-signal to realize the manual downshift of the automobile. 2. A shifter circuit according to claim 1, characterized in that, in the infrared emitting unit, the cathode of the infrared emitting head is grounded, and the anode of the infrared emitting head passes through parallel resistors R1, R2 and R3 Connect to the VCC terminal of the power supply. 3 . The shifter circuit according to claim 1 , wherein the infrared receiving unit includes a first infrared receiving head Q1 and a second infrared receiving head Q2 , and the first infrared receiving head Q1 . The light-receiving surface is used to receive the infrared signal emitted by the infrared transmitting unit. The emitter of the first infrared receiving head Q1 is grounded, and the collector of the first infrared receiving head Q1 is connected to the VCC terminal of the power supply through the resistor R4. At the same time, The collector of the first infrared receiving head Q1 is grounded through the capacitor C1, and the sensor_M+ terminal is set between the resistor R4 and the capacitor C1; Infrared signal, the emitter of the second infrared receiving head Q2 is grounded, the collector of the second infrared receiving head Q2 is connected to the VCC terminal of the power supply through the resistor R5, and at the same time, the collector of the second infrared receiving head Q2 is connected by a capacitor. C2 is grounded, and the sensor_M- terminal is set between the resistor R5 and the capacitor C2. 4. A kind of shifter circuit according to claim 1, is characterized in that, in described M signal output unit, the Sensor_M+ end in described infrared receiving unit is connected with the first pin of OR gate D9, described infrared The Sensor_M-terminal in the receiving unit is connected to the second pin of the OR gate D9, the third pin of the OR gate is connected to the base of the first transistor Q5, and the emitter of the first transistor Q5 is grounded, The collector of the first triode Q5 is grounded via the fuse F3 and the capacitor C9, the base of the first triode Q5 is grounded via the capacitor C10, and at the same time, the base of the first triode Q5 is grounded via a resistor R7 is grounded, and the M signal output terminal M_Output is set between the fuse F3 and the capacitor C9. 5 . The shifter circuit according to claim 1 , wherein, in the M+ signal output unit, the base of the second transistor Q7 is connected to the Sensor_M- terminal through a resistor R12 , while the second transistor Q7 is connected to the Sensor_M- terminal. 6 . The base of the transistor Q7 is connected to the cathode of the first diode D6, the collector of the second transistor Q7 is grounded through the resistor R14, the emitter of the second transistor Q7 is connected to the Sensor_M+ terminal, the third The base of the transistor Q3 is grounded via the capacitor C11, the emitter of the third transistor Q3 is grounded, and the collector of the third transistor Q3 is grounded via the fuse F1 and the capacitor C3, the one between the fuse F1 and the capacitor C3 is grounded The time is set as the output terminal M+_Output of the M+ signal. 6 . The shifter circuit according to claim 1 , wherein in the M-signal output unit, the base of the fifth transistor Q6 is connected to the Sensor_M+ terminal through a resistor R11 , while the fifth transistor Q6 is connected to the Sensor_M+ terminal. 7 . The base of the transistor Q6 is connected to the cathode of the second diode D2, the collector of the fifth transistor Q6 is grounded through the resistor R13, the emitter of the fifth transistor Q6 is connected to the Sensor_M- terminal, the first The base of the four triode Q4 is grounded via the capacitor C12, the emitter of the fourth triode Q4 is grounded, and the collector of the fourth triode Q4 is grounded via the fuse F2 and the capacitor C4, the fuse F2 and the capacitor C4 M-_Output is set as the output terminal of the M-signal between. 7 . The shifter circuit according to claim 2 , wherein the model of the infrared emitting head is SFH4244. 8 . 8 . The shifter circuit according to claim 3 , wherein the model of the first receiving head and the second receiving head is SFH325. 9 . 9. A shifter, characterized by comprising the shifter circuit according to any one of claims 1-8.

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