KR20210051455A - Circuit for modeling of digital sensor signal and control method therefor - Google Patents

Abstract

The present invention relates to a digital sensor signal realization circuit and a control method thereof and, more particularly, to a digital sensor signal realization circuit and a control method thereof, wherein the digital sensor signal realization circuit is connected between a digital sensor and a control system to delay an output signal of the digital sensor or to apply a noise. Therefore, more reliable verification results can be provided to circuit designers.

Description

Circuit for modeling of digital sensor signal and control method therefor}

The present invention relates to a digital sensor signal implementation circuit and a control method thereof, and more particularly, to a digital sensor signal, characterized in that it is connected between the digital sensor and the control system to delay the output signal of the digital sensor or impart noise. It relates to an implementation circuit and a control method thereof.

In general, an engine control system (EMS) (Engine Management System) is used to control torque, fuel economy, and sensors of an engine of a vehicle.

The engine control system (EMS) receives operation signals from actuators such as spark plugs, throttle valves, and idle valves installed in the engine, and sensors from various sensors that measure coolant temperature, air temperature, and oxygen concentration of exhaust gas. It receives signals and controls the operation of the engine.

However, for the sensors used in the engine control system, an output tolerance is induced in the sensor signal due to the manufacturing dispersion and assembly tolerance of the engine itself.

If the output tolerances of these sensors are not considered, the engine operates abnormally and there is a concern that the efficiency of the engine may be lowered. Therefore, the control logic of the engine control system must be developed in consideration of the output tolerances of the sensors.

Accordingly, when developing the control logic of the engine control system considering the output tolerance of the sensors, the upper and lower limits of each sensor and related parts are manufactured and used for control logic development and data mapping.

Typically, the sensors received by the engine control system (EMS) are analog-type sensors in which the value of the sensor's output signal continuously fluctuates, and digital-type sensors in which the values of the sensor's output signals are output in the state of 0 and 1. It is largely divided.

1A and 1B show the output signal of the analog type sensor and the output signal of the digital type sensor. As shown in Fig. 1A, the analog type sensor is of the upper limit sensor signal having the maximum output signal. The output signal (P) and the output signal (Q) of the sensor signal of the lower limit product having the output signal of the minimum value are respectively prepared to develop a control logic to be used for engine control according to the upper and lower limit conditions of the sensor.

In this case, the output signal of the maximum value of the upper limit sensor and the output signal of the minimum value of the lower limit sensor are also referred to as'bad conditions' of the analog type sensor output signal.

However, the output signal of the digital type sensor is different from the output signal of the analog type sensor described above in terms of evil conditions.

That is, as shown in FIG. 1B, the output signal of the digital type sensor has an evil condition in which the output signal is delayed and noise is generated in the output signal.

The delay and noise of these signals are generated by the influx of disturbances applied to the sensor when the engine is driven, so it is difficult to predict the signal compared to the analog type sensor signal having an upper limit and a lower limit, and accordingly, the output tolerance of the digital sensor's output signal is determined. It takes a long time to develop the considered control logic.

Moreover, in case of manufacturing the upper and lower limit products in order to consider the output tolerance, the digital sensor has a disadvantage of increasing the design cost for this, since it must be performed by manufacturing parts related to the sensor in addition to the sensor.

The present invention was devised to solve the problems of the related art as described above, and there is no need to manufacture the upper and lower limits of the digital sensor and related parts thereof in order to develop the control logic in consideration of the output tolerance of the digital sensor. There is a technical problem of the present invention to provide a digital sensor signal implementation circuit and a control method that can electrically implement a delay signal and a noise signal of a digital sensor.

A digital sensor signal implementation circuit and a control method thereof according to the present invention for achieving the above technical problem is characterized in that it is connected between the digital sensor and the control system to delay the output signal of the digital sensor or to impart noise.

The digital sensor signal implementation circuit and its control method of the present invention having the above-described configuration need to manufacture the upper and lower limits of the digital sensor and related parts thereof in order to develop the control logic in consideration of the output tolerance of the digital sensor. Without it, since the delay signal and the noise signal of the digital sensor can be electrically implemented, it is possible to reduce the time required for developing a circuit using the digital sensor and the corresponding cost.

In addition, since the delay and noise of the digital sensor can be given constant, a more reliable verification result can be provided to the circuit designer.

1A and 1B are diagrams showing an output signal of an analog type sensor and an output signal of a digital type sensor.
2 is a block diagram showing the wiring state of the digital sensor signal implementation circuit of the present invention;
3 is a circuit diagram of a digital sensor signal implementation circuit of the present invention,
4 is a flowchart of a control method for outputting a turn-on delay modulated signal of the digital sensor signal implementation circuit of the present invention;
5 is a flow chart of a control method for outputting a turn-off delay modulated signal of the digital sensor signal implementation circuit of the present invention;
6 is a flow chart of a control method for outputting a total delay modulated signal of the digital sensor signal implementation circuit of the present invention;
7 is a flowchart of a control method for outputting a noise signal of the digital sensor signal implementation circuit of the present invention;
8 is a timing chart of an output signal for each situation implemented using the digital sensor signal implementation circuit of the present invention, FIG. 8A is an output signal in a CMP-CKP unlink situation when the engine is started, and FIG. 8B is a CMP noise when the engine is started OFF. The output signal when the signal flows in, FIG. 8C is a timing chart showing the output signal when the CMP signal is pushed when the engine oil is high at low oil pressure.

Hereinafter, a configuration of a digital sensor signal implementation circuit and a control method thereof according to the present invention will be described with reference to the drawings.

However, the disclosed drawings are provided as an example to sufficiently convey the spirit of the present invention to those skilled in the art. Accordingly, the present invention is not limited to the drawings presented below and may be embodied in other aspects.

In addition, unless otherwise defined in terms of the terms used in the present specification, they have the meanings commonly understood by those of ordinary skill in the art to which the present invention pertains, and the gist of the present invention in the following description and accompanying drawings. Detailed descriptions of known functions and configurations that may be unnecessarily obscure will be omitted.

2 is a block diagram showing the wiring state of the digital sensor signal implementation circuit of the present invention.

In general, as shown in the general digital sensor connection diagram shown in the upper part of FIG. 2, the output signal of the digital sensor alternately represents a voltage of 0V or 5V, and as shown, the digital sensor 1 (hereinafter, abbreviated as a sensor) As the transistor TR is switched ON/OFF by the original signal, a 0V or 5V signal is output.

The signal output from the sensor 1 is input to the pull-up resistance Rp of the control system 2 such as EMS (Engine Management System) along the signal line, and the pull-up resistance Rp. When the transistor (TR) of the sensor (1) is switched to the ON state, the voltage of the 5V state applied to the pull-up resistor (Rp) drops to the ground, and the process of turning to the 0V state is repeatedly performed. Meanwhile, the control system 2 recognizes the 0V or 5V state of the sensor and performs signal processing accordingly.

The digital sensor signal implementation circuit 10 of the present invention receives the output signal of the sensor 1 and the output of the digital sensor 1 is turned-on delay, turn-off delay, This is a circuit that modulates the output timing to become a total delay.

In addition, the digital sensor signal implementation circuit 10 of the present invention is a circuit that receives the output signal of the sensor 1 and implements a noise signal in the output signal of the sensor.

Therefore, in the prior art, in order to develop a control logic in consideration of the output tolerance of a digital sensor, it was necessary to manufacture and test the upper and lower limits of the digital sensor and related parts thereof, but the digital sensor implementation circuit 10 of the present invention Since the delay signal and noise signal of can be artificially implemented, there is no need to separately manufacture the upper or lower limit of the sensor and related parts, so it is possible to reduce the time required for circuit development and the corresponding cost.

In addition, since the digital sensor signal realization circuit 10 of the present invention can always give a constant delay and noise of the digital sensor, it is possible to provide a reliable verification result to the designer.

The digital sensor signal implementation circuit 10 of the present invention performing the functions as described above is connected between the sensor 1 and the control system 2 as shown in the connection block diagram shown in the lower part of FIG. 2.

At this time, since the sensor 1 only performs control of the transistor TR, the digital sensor signal implementation circuit 10 of the present invention allows the implementation circuit 10 to recognize the output signal of the sensor 1 as a voltage. Power and pull-up resistors are required.

In addition, when modulating the signal output from the sensor 1, the digital sensor signal realization circuit 10 of the present invention provides the original signal output from the sensor 1 so as not to impart unnecessary influence, noise or disturbance to the sensor circuit. A voltage follower circuit is required that allows the original signal to be copied and modulated while maintaining the as it is.

In addition, the implementation circuit 10 of the present invention needs a circuit configuration capable of applying a high signal (0V) and a low signal (5V) voltage to the control system 2.

3 is a circuit diagram of a digital sensor signal implementation circuit 10 according to an embodiment of the present invention.

Referring to the drawing, a sensor input unit 100 receiving a sensor signal generated from the sensor 1 and a voltage follower copying the original signal while maintaining the sensor signal input to the sensor input unit 100 ( 110), a first signal modulator 120 that receives the output signal of the voltage follower 110 and modulates it to 0V, and a second signal modulator that receives the output signal of the voltage follower 110 and modulates it to 5V. The unit 130, a central control unit (CPU) 140 for controlling the output timing of the first signal modulator 120 and the second signal modulator 130, and control of the central control unit 140 It is composed of an output unit 150 that outputs a signal modulated by the first signal modulator 120 or the second signal modulator 130 by a signal to the control system 2 of the vehicle.

A pull-up resistor R_PU is connected to the sensor input unit 100 to prevent interference of the pull-up resistor on the output side.

The voltage follower 110 is a typical voltage follower circuit employing an OP-AMP.

In addition, the first signal modulator 120 and the second signal modulator 130 employ switch circuits using conventional transistors Q1 and Q2, respectively.

At this time, in order to prevent overcurrent from being applied to the voltage follower 110 when the first signal modulator 120 and the second signal modulator 130 are modulated, the transistors Q1 and Q2 of each of the modulators 120 and 130 ) To the current consumption resistor (R_F2).

In addition, a signal amplifier made of OP-AMP between the output terminal of the voltage follower 110 and the second signal modulator 130 so that the second signal modulator 130 amplifies and outputs a signal to 5V ( U1_2) was connected.

Meanwhile, the central control unit 140 uses a conventional CPU (Central Processing Unit) having sensor signal input terminals D2 and D3 and control signal output terminals D8 and D9.

3 as described above, the output of the digital sensor 1 receives the output tolerance of the sensor 1 using the digital sensor signal realization circuit 10 of the embodiment of the present invention, and the output of the digital sensor 1 is turned-on delay, turn-on delay. A control method of modulating and outputting a turn-off delay, a total delay, and a noise signal will be described.

The control method for the modulation of the output timing is the sensor input unit 100, the voltage follower 110, the first signal modulator 120, and the second signal modulator of the digital sensor signal realization circuit 10 according to the embodiment of the present invention. Implemented by the unit 130, the central control unit (CPU) 140 and the output unit 150, the program for control is stored and executed in a memory device (not shown) linked to the central control unit 140 do.

Hereinafter, according to the type of the signal to be modulated, it will be described in a modified manner.

1) Control method for outputting a turn-on delay modulated signal

4 is a flowchart of a control method for outputting a turn-on delay modulated signal according to an embodiment of the present invention.

In the control method of the turn-on delay modulated signal, the digital sensor signal realization circuit 10 receives a sensor signal from the sensor 1 and modulates the corresponding signal to generate a turn-on delay. As a control method for delivery, it includes the following steps.

First, the central control unit 140 determines whether the sensor signal input from the sensor input unit 100 and transmitted through the voltage follower 110 is a falling edge (S10).

Specifically, the determination of the falling edge is the sum of the voltage value V1 of the signal at the point sig 1 and the voltage value V2 at the point sig 2 as shown in the timing chart shown on the side of step S10 of FIG. If it is greater than the sum of the voltage value of the signal at the point sig 3 (V3), the voltage value at the point sig 4 (V4) and the output signal distortion (THD) (V1+V2> V3+V4+THD) ) It is determined as a falling edge.

Here, the reason why the output signal distortion value THD is added is to prevent a case where the falling edge is misrecognized due to the distortion of the input signal by noise.

And, if it is determined as the falling edge in step S10, the central control unit 140 transmits the control signal to the first signal modulator 120, and the output signal of the output unit 150 by the first signal modulator 120 Output as OV (S11), and maintain OV output. This is a preliminary operation for recognizing a rising edge to be described later.

Next, in order to recognize the turn-on delay, the central control unit 140 determines whether the sensor signal input from the sensor input unit 100 and transmitted through the voltage follower 110 is a rising edge (S12).

Specifically, the determination of the rising edge is the sum of the voltage value V7 of the signal at the point sig 7 and the voltage value V8 at the point sig 8, as in the timing chart shown on the side of step S12 of FIG. 4 If the sum of the voltage value of the signal at the point sig 5 (V5), the voltage value at the point sig 6 (V6) and the output signal distortion value (Total Harmonic Distortion, THD) is greater than this (V7+V8> V5+) V6+THD) is determined as a falling edge.

And, if it is determined in step S12 as a rising edge, as described above, since the rising edge is recognized while maintaining the OV output after the falling edge is recognized in step S10, the point at which the central control unit 140 converts from OV to 5V. In order to delay the turn-on timing for a certain period of time from S12, the turn-on delay time (Td1) is given and waits for a certain period of time from the time when the rising edge is recognized in step S12 (S13), and when the turn-on delay time (Td1) elapses, the The control signal is transmitted to the second signal modulator 130, and the output signal of the output unit 150 is output as 5V by the second signal modulator 120 (S14), and the 5V output is maintained. In this case, the value of the turn-on delay time Td1 may be changed.

2) Control method for outputting a turn-off delay modulated signal

5 is a flowchart of a control method for outputting a turn-off delay modulated signal according to an embodiment of the present invention.

In the control method of the turn-off delay modulated signal, the digital sensor signal realization circuit 10 receives a sensor signal from the sensor 1 and modulates the corresponding signal to generate a turn-off delay. ), which includes the following steps, and reversely applies the control method for outputting the turn-on delay modulated signal described with reference to FIG. 4.

First, the central control unit 140 determines whether the sensor signal input from the sensor input unit 100 and transmitted through the voltage follower 110 is a rising edge (S20).

Specifically, the determination of the rising edge is the sum of the voltage value V1 of the signal at the point sig 1 and the voltage value V2 at the point sig 2 as in the timing chart shown on the side of step S20 of FIG. 5. If the sum of the voltage value of the signal at the point sig 3 (V3), the voltage value at the point sig 4 (V4) and the output signal distortion (THD) is greater than (V1+V2> V3+V4) +THD) It is determined as a falling edge.

If it is determined as the rising edge in step S20, the central control unit 140 transmits a control signal to the second signal modulator 130, and the output signal of the output unit 150 is 5V by the second signal modulator 130. Output to (S21), and maintain 5V output. This is a preliminary operation for recognizing a falling edge to be described later.

Next, in order to recognize the turn-off delay, the central control unit 140 determines whether the sensor signal input from the sensor input unit 100 and transmitted through the voltage follower 110 is a falling edge (S22). .

Specifically, the determination of the falling edge is the sum of the voltage value V5 of the signal at the point sig 5 and the voltage value V6 at the point sig 6 as in the timing chart shown on the side of step S22 of FIG. If the current point is greater than the sum of the voltage value of the signal at the point sig 7 (V7), the voltage value at the point sig 8 (V8) and the output signal distortion (THD) (V5+V6> V7+V8+) THD) Recognized as a falling edge.

And, if the falling edge is determined in step S22, the 5V output is maintained after the rising edge is recognized in step S20 as described above, and the falling edge is recognized, so the point at which the central control unit 140 converts from 5V to 0V. In order to delay the turn-on timing for a certain period of time from S22, a turn-on delay time (Td2) is given for a certain period of time from the time when the falling edge is recognized in step S22 and waits (S13), and when the turn-on delay time (Td2) elapses, the The control signal is transmitted to the first signal modulator 120, and the output signal of the output unit 150 is output as 0V by the first signal modulator 120 (S24), and the 0V output is maintained. In this case, the value of the turn-on delay time Td2 may be changed.

3) Control method for total delay modulated signal output

The total delay modulated signal control method is controlled by the digital sensor signal realization circuit 10 receiving a sensor signal from the sensor 1 and modulating the corresponding signal to generate a total delay by delaying turn-on and turn-off. As a control method for transmission to the system 2, it includes the following steps.

First, the central control unit 140 determines whether the sensor signal input from the sensor input unit 100 and transmitted through the voltage follower 110 is a rising edge (S30).

The determination of the rising edge is the sum of the voltage value V1 of the signal at the point sig 1 and the voltage value V2 at the point sig 2 as described with reference to the timing chart shown on the side of step S20 of FIG. 5. If the value is greater than the sum of the voltage value (V3) of the signal at the point sig 3, the voltage value at the point sig 4 (V4) and the output signal distortion value (Total Harmonic Distortion, THD) is greater than (V1+V2> V3) +V4+THD) is determined as a falling edge.

And, if it is determined as the rising edge in step S30, in order to delay the turn-on timing for a certain time from the point when the central control unit 140 converts from OV to 5V, a certain time from the point in time when the rising edge is recognized in step S30. During the turn-on delay time (Td1) is given and waits (S31), and when the turn-on delay time (Td1) elapses, a control signal is transmitted to the second signal modulator 130 and output by the second signal modulator 120 The output signal of the unit 150 is output as 5V (S32), and the 5V output is maintained.

Subsequently, the central control unit 140 determines whether the sensor signal input from the sensor input unit 100 and transmitted through the voltage follower 110 is a falling edge (S33).

The determination of the falling edge is the sum of the voltage value V5 of the signal at the point sig 5 and the voltage value V6 at the point sig 6 as described with reference to the timing chart shown on the side of step S22 of FIG. 5. If the value is greater than the sum of the voltage value of the signal at the point sig 7 (V7), the voltage value at the point sig 8 (V8) and the output signal distortion value (Total Harmonic Distortion, THD) at the present time (V5+V6> V7+) V8+THD) is determined as a falling edge.

When the falling edge of the sensor signal is recognized in the step S33, in order to delay the turn-off timing for a certain time from the time when the signal is converted from 5V to 0V, the turn-off delay time for a certain time from the time when the rising edge is recognized in step S33 (Td2) is given and waits (S34), and when the turn-off delay time (Td2) elapses, a control signal is transmitted to the first signal modulator 120 and the output unit 150 is applied by the first signal modulator 120. The output signal of) is output as 0V (S35), and the 0V output is maintained.

Therefore, as in the timing chart shown on the side of step S35, a delay is made at the rising edge for the turn-on delay time (Td1), and a delay is made during the turn-off delay time (Td2) at the falling edge, and as a whole, the rising edge and the falling edge The sensor signal is modulated as a total delay occurs at the edge.

At this time, as described above, the turn-on delay time (Td1) and the turn-off delay time (Td2) of the entire delayed modulated signal can be adjusted, respectively.

7 is a flowchart of a control method for outputting a noise signal of the digital sensor signal implementation circuit of the present invention.

If noise is generated in the sensor signal, it may affect the calculation of the engine speed (rpm) of the controller, and an error may occur in the judgment during engine control by the engine control system (EMS). Engine control must be achieved.

Accordingly, the digital sensor signal realization circuit 10 of the present invention receives a sensor signal from the sensor 1 and modulates the signal to generate rising noise or falling noise, and the control system 2 It performs the control method that transfers to.

A modulation method for generating rising noise among noise generated in such a sensor signal will be described.

The central control unit 140 determines whether the sensor signal input from the sensor input unit 100 and transmitted through the voltage follower 110 is a falling edge (S40).

The determination of the falling edge is the sum of the voltage value V1 of the signal at the point sig 1 and the voltage value V2 at the point sig 2 at the present time as in the timing chart shown on the side of step S10 of FIG. If it is greater than the sum of the voltage value of the signal at point 3 sig (V3) and the voltage value at point 4 sig (V4) and the output signal distortion (THD) (V1+V2> V3+V4+THD) It is determined as a falling edge.

If it is determined as a falling edge in step S40, the central control unit 140 transmits a control signal to the first signal modulator 120 to pre-delay from the point at which the falling edge is recognized through the first signal modulator 120. During time Td3, the output signal of the output unit 150 is output as OV (S41).

The pre-delay time Td3 is adjustable as a time until rising noise is generated in the sensor signal.

And, when the pre-delay time (Td3) elapses, the central control unit 140 transmits a control signal to the second signal modulator 130 to output the output unit 150 by the second signal modulator 130. The signal is output and maintained as 5V during the noise generation time Tn (S42).

Thereafter, when the noise generation time Tn elapses, the central control unit 140 transmits a control signal to the first signal modulator 120, and the first signal modulator 120 transmits the control signal to the output unit 150. The output signal is output as 0V and the 0V output is maintained (S43), thereby releasing the noise.

Accordingly, rising noise outputted as 5V is generated in the sensor signal only during the noise generation time Tn after the pre-delay time Td3 has elapsed in the state of 0V after recognizing the falling edge of the sensor signal.

Next, a modulation method for generating falling noise will be described.

The central control unit 140 determines whether the sensor signal input from the sensor input unit 100 and transmitted through the voltage follower 110 is a rising edge (S50).

The determination of the rising edge is the sum of the voltage value V1 of the signal at the point sig 1 and the voltage value V2 at the point sig 2 as described with reference to the timing chart shown on the side of step S20 of FIG. 5. If the value is greater than the sum of the voltage value (V3) of the signal at the point sig 3, the voltage value at the point sig 4 (V4) and the output signal distortion value (Total Harmonic Distortion, THD) is greater than (V1+V2> V3) +V4+THD) is determined as a falling edge.

If it is determined as a rising edge in step S50, the central control unit 140 transmits a control signal to the second signal modulator 130 to pre-delay from the point at which the rising edge is recognized through the second signal modulator 120. During time Td4, the output signal of the output unit 150 is output as 5V (S51).

The pre-delay time Td4 is adjustable as a time until falling noise is generated in the sensor signal.

In addition, when the pre-delay time Td4 elapses, the central control unit 140 transmits a control signal to the first signal modulator 120 to output the output unit 150 through the first signal modulator 120. The signal is output and maintained as 0V during the noise generation time Tn (S52).

Thereafter, when the noise generation time (Tn) elapses, the central control unit 140 transmits a control signal to the second signal modulator 130 and transmits the control signal to the output unit 150 through the second signal modulator 130. The output signal is maintained at 5V (S53) to release the noise.

Accordingly, falling noise, which is output as 0V only during the noise generation time Tn, after the pre-delay time Td4 has elapsed in the state of 5V after the rising edge of the sensor signal is recognized is generated in the sensor signal.

8A to 8C are timing charts of output signals for each situation implemented using the digital sensor signal implementation circuit of the present invention.

First, the timing chart of FIG. 8A is an output signal in the case of CMP (Cam Shaft Position)-CKP (Crank Shaft Position) unlink when the engine is started, and the CVVT (Continuously Variable Valve Timing) lock pin is not connected when the engine is started. If not, the sensor signal is modulated so that the signal un-sync between CMP-CKP occurs due to a poor position at the next start-up.It is used when verifying whether there is a logic error or re-sync. I can.

In addition, the timing chart of FIG. 8B shows the output signal when the CMP noise signal flows when the CMP noise signal is introduced when the engine is turned off in order to determine whether the engine speed (rpm) is recognized satisfactorily when the CMP noise signal is added when the start is OFF. When a noise signal is introduced into the signal, it can be used to verify whether it is not recognized as noise.

In addition, FIG. 8C is a timing chart showing the output signal when the CMP signal is pushed when the engine oil is high and low oil pressure.When the engine oil is high, the viscosity of the oil is low and the pressure is lowered.At this time, the oil pressure cannot overcome the cam torque. The CMP can be physically pushed, but it can be used to reproduce this situation and verify that there are no problems with control.

The digital sensor signal implementation circuit and its control method of the present invention configured as described above can extend the verification coverage when evaluating the control program of the control system, so that the time when verification using the conventional upper and lower limit sensor real objects is performed. Due to the limitation of cost and cost, the disadvantage of having to be selectively verified has been solved.

In addition, according to the present invention, the turn-on delay time, the turn-off delay time, or the total delay time of the sensor signal can be adjusted, and the noise can be set as desired, greatly increasing the degree of freedom when verifying the control program according to the sensor signal output error. It is possible to support so that precise control can be performed.

* Description of the symbols for the main parts of the drawing *
One; sensor
2; Control system
10; Digital sensor signal implementation circuit of the present invention
110; Voltage followers
120; 1st signal modulator
130; 2nd signal modulator
140; Central control unit (CPU)
150; Output

Claims (10)

It is connected between the digital sensor 1 and the control system 2 to delay the turn-on of the output signal of the digital sensor 1,
A digital sensor signal implementation circuit, characterized in that noise is applied to the output signal of the digital sensor (1).
The method of claim 1, wherein the digital sensor signal implementation circuit,
A digital sensor signal implementation circuit, characterized in that turning-off delay the output of the digital sensor (1).
The method of claim 1, wherein the digital sensor signal implementation circuit,
Digital sensor signal implementation circuit, characterized in that the total delay (Total delay) the output of the digital sensor (1).
The method of claim 1, wherein the digital sensor signal implementation circuit,
A sensor input unit 100 receiving a sensor signal generated from the digital sensor 1,
A voltage follower 110 that copies the original signal while maintaining the sensor signal input to the sensor input unit 100 as it is,
A first signal modulator 120 that receives the output signal of the voltage follower 110 and modulates it to 0V,
A second signal modulator 130 that receives the output signal of the voltage follower 110 and modulates it to 5V,
A central control unit (CPU) 140 for controlling output timing of the first signal modulator 120 and the second signal modulator 130,
An output unit 150 for outputting the modulated signal of the first signal modulator 120 or the second signal modulator 130 according to the control signal of the central control unit 140 to the control system 2 of the vehicle Digital sensor signal implementation circuit, characterized in that consisting of.
A digital sensor having a sensor input unit 100, a voltage follower 110, a first signal modulator 120, a second signal modulator 130, a central control unit (CPU) 140 and an output unit 150 The signal implementation circuit 10,
When the output signal of the digital sensor 1 is input, the sensor output transmits any one of a turn-on delay, a turn-off delay, a total delay, and a noise signal. A control method for realizing a digital sensor signal, characterized in that modulating to generate and outputting. The method of claim 5, wherein the control method for outputting the turn-on delay modulated signal comprises:
Determining, by the central control unit 140, whether a sensor signal input from the sensor input unit 100 and transmitted through the voltage follower 110 is a falling edge (S10);
If it is determined as the falling edge in step S10, the central control unit 140 transmits a control signal to the first signal modulator 120, and the output signal of the output unit 150 is converted to OV by the first signal modulator 120. Outputting to (S11);
Determining whether the sensor signal input from the sensor input unit 100 and transmitted through the voltage follower 110 is a rising edge in order to recognize the turn-on delay (S12);
If it is determined that the rising edge is a rising edge in step S12, in order to delay the turn-on timing for a certain time from the time when the central control unit 140 is converted from OV to 5V, the rising edge is recognized in step S12 for a certain period of time. A turn-on delay time (Td1) is given to wait (S13), and when the turn-on delay time (Td1) elapses, a control signal is transmitted to the second signal modulator 130 and output by the second signal modulator 120 Outputting the output signal of the unit 150 as 5V (S14); Control method for implementing a digital sensor signal, characterized in that configured to include.
The method of claim 5, wherein the control method for outputting the turn-off delay modulated signal comprises:
Determining, by the central control unit 140, whether the sensor signal input from the sensor input unit 100 and transmitted through the voltage follower 110 is a rising edge (S20);
If it is determined as the rising edge in step S20, the central control unit 140 transmits a control signal to the second signal modulator 130, and the output signal of the output unit 150 is 5V by the second signal modulator 130. Outputting to (S21);
Determining whether the sensor signal input from the sensor input unit 100 and transmitted through the voltage follower 110 is a falling edge in order to recognize the turn-off delay (S22);
If it is determined as a falling edge in step S22, in order to delay the turn-on timing for a certain time from the time when the central control unit 140 converts from 5V to 0V, turn-on for a certain time from the time when the falling edge is recognized in step S22. A delay time (Td2) is given to wait (S13), and when the turn-on delay time (Td2) elapses, a control signal is transmitted to the first signal modulator 120 to be output by the first signal modulator 120. Outputting the output signal of 150 as 0V (S24); Control method for implementing a digital sensor signal, characterized in that configured to include.
The method of claim 5, wherein the control method for outputting the total delay modulated signal comprises:
Determining, by the central control unit 140, whether a sensor signal input from the sensor input unit 100 and transmitted through the voltage follower 110 is a rising edge (S30);
If it is determined that the rising edge is a rising edge in step S30, in order to delay the turn-on timing for a certain time from the point when the central control unit 140 converts from OV to 5V, it turns on for a certain time from the point when the rising edge is recognized in step S30. A delay time (Td1) is given and waits (S31), and when the turn-on delay time (Td1) elapses, a control signal is transmitted to the second signal modulator 130 and the output unit is output by the second signal modulator 120. Outputting the output signal of 150 as 5V (S32);
Determining, by the central control unit 140, whether a sensor signal input from the sensor input unit 100 and transmitted through the voltage follower 110 is a falling edge (S33);
When the falling edge of the sensor signal is recognized in the step S33, in order to delay the turn-off timing for a certain time from the time when the signal is converted from 5V to 0V, the turn-off delay time for a certain time from the time when the rising edge is recognized in step S33 (Td2) is given and waits (S34), and when the turn-off delay time (Td2) elapses, a control signal is transmitted to the first signal modulator 120 and the output unit ( Outputting the output signal of 150) as 0V (S35); Control method for implementing a digital sensor signal, characterized in that configured to include.
The method according to claim 5, wherein as a control method for outputting a noise signal,
The noise signal is rising noise,
Determining, by the central control unit 140, whether a sensor signal input from the sensor input unit 100 and transmitted through the voltage follower 110 is a falling edge (S40);
If it is determined as a falling edge in step S40, the central control unit 140 transmits a control signal to the first signal modulator 120 to pre-delay from the point at which the falling edge is recognized through the first signal modulator 120. Outputting an output signal of the output unit 150 as OV for a time Td3 (S41);
When the pre-delay time (Td3) has elapsed, the central control unit 140 transmits a control signal to the second signal modulator 130 to transmit the output signal of the output unit 150 by the second signal modulator 130. Outputting and maintaining 5V during the noise generation time Tn (S42);
When the noise generation time (Tn) elapses, the central control unit 140 transmits a control signal to the first signal modulator 120, and the output signal of the output unit 150 by the first signal modulator 120 Outputting 0V to maintain the 0V output (S43); Control method for implementing a digital sensor signal, characterized in that configured to include.
The method according to claim 5, wherein as a control method for outputting a noise signal,
The noise signal is falling noise,
Determining, by the central control unit 140, whether the sensor signal input from the sensor input unit 100 and transmitted through the voltage follower 110 is a rising edge (S50);
If it is determined as a rising edge in step S50, the central control unit 140 transmits a control signal to the second signal modulator 130 to pre-delay from the point at which the rising edge is recognized through the second signal modulator 120. Outputting the output signal of the output unit 150 as 5V for a time Td4 (S51);
When the pre-delay time (Td4) elapses, the central control unit 140 transmits a control signal to the first signal modulator 120 to transmit the output signal of the output unit 150 through the first signal modulator 120. Outputting and maintaining 0V during the noise generation time Tn (S52);
When the noise generation time (Tn) elapses, the central control unit 140 transmits a control signal to the second signal modulator 130, and the output signal of the output unit 150 through the second signal modulator 130 The control method for implementing a digital sensor signal, characterized in that comprising a; step of maintaining the 5V (S53).

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