CN111397791A - Pressure detection and display alarm chip and system - Google Patents
Pressure detection and display alarm chip and system Download PDFInfo
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- CN111397791A CN111397791A CN201910004971.6A CN201910004971A CN111397791A CN 111397791 A CN111397791 A CN 111397791A CN 201910004971 A CN201910004971 A CN 201910004971A CN 111397791 A CN111397791 A CN 111397791A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/02—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/08—Means for indicating or recording, e.g. for remote indication
- G01L19/083—Means for indicating or recording, e.g. for remote indication electrical
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/08—Means for indicating or recording, e.g. for remote indication
- G01L19/12—Alarms or signals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/02—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning
- G01L9/025—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning with temperature compensating means
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- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention provides a pressure detection and display alarm chip and a system, wherein the chip comprises: the electric signal generating module is used for collecting the pressure of the sample to be detected so as to convert the collected pressure into an electric signal; the data processing module is connected with the electric signal generating module and used for converting the electric signal into a pressure signal, generating a high-pressure alarm signal when the pressure signal is greater than a reference high pressure and generating a low-pressure alarm signal when the pressure signal is less than a reference low pressure; and the working voltage providing module is connected with the data processing module and is used for providing working voltage for the data processing module. The invention solves the problems that the existing automobile pressure detection chip has single function and can generate an alarm signal only by being matched with a peripheral circuit, so that the circuit structure is complicated.
Description
Technical Field
The invention belongs to the technical field of electronics, and particularly relates to a pressure detection and display alarm chip and a system.
Background
The pressure of the engine oil of the automobile is an important diagnostic parameter of an engine lubricating system, and the size of the pressure depends on the temperature and viscosity of the engine oil, the oil supply capacity of an oil pump, the adjustment of a pressure limiting valve, the resistance of an oil channel and an oil filter, the clearance of a crankshaft main bearing, a connecting rod bearing and a camshaft bearing and the like. When the engine runs, normal engine oil pressure must be maintained; if the oil pressure is too low, the friction surfaces may become more worn due to insufficient lubrication; if the oil pressure is too high, the oil seal and the oil filter are easily damaged, and the power of the engine is wasted.
The existing automobile pressure detection chip generally only carries out pressure detection, so when the existing automobile pressure detection chip is used for carrying out pressure detection and alarming, a comparison processing circuit is required to be arranged on the periphery of the chip so as to generate an alarm signal to an alarm unit. Therefore, the existing automobile pressure detection chip has a single function, and the generation of an alarm signal can be realized only by matching with a peripheral circuit.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a pressure detection and display alarm chip and system, which are used to solve the problems of the existing automobile pressure detection chip that the function is single, and the alarm signal can be generated only by matching with the peripheral circuit, which results in a complicated circuit structure.
In order to achieve the above and other related objects, the present invention provides a pressure detecting and displaying alarm chip, which comprises:
the electric signal generating module is used for collecting the pressure of the sample to be detected so as to convert the collected pressure into an electric signal;
the data processing module is connected with the electric signal generating module and used for converting the electric signal into a pressure signal, generating a high-pressure alarm signal when the pressure signal is greater than a reference high pressure and generating a low-pressure alarm signal when the pressure signal is less than a reference low pressure;
and the working voltage providing module is connected with the data processing module and is used for providing working voltage for the data processing module.
Optionally, the electrical signal generating module comprises: and the pressure sensor is used for collecting the pressure of the sample to be detected so as to convert the collected pressure into an electric signal.
Optionally, the electrical signal generating module further comprises: and the temperature compensation unit is used for detecting the temperature of the sample to be detected and comparing the detected temperature with the reference temperature so as to perform temperature compensation on the electric signal based on the comparison result.
Optionally, the temperature compensation unit includes:
the temperature sensor is used for detecting the temperature of the sample to be detected;
the first comparator is connected with the temperature sensor and used for comparing the detected temperature with the reference temperature and outputting a comparison result;
and the controller is connected with the first comparator and used for providing the reference temperature for the first comparator and carrying out temperature compensation on the electric signal based on the comparison result.
Optionally, the electrical signal generating module further comprises: and the amplifying unit is connected with the pressure sensor and used for amplifying the electric signal and then outputting the electric signal.
Optionally, the pressure sensor comprises a piezoresistive sensor.
Optionally, the data processing module includes:
the pressure signal generator is connected to the electric signal generating module and used for converting the electric signal into a pressure signal to be output;
the second comparator is connected with the pressure signal generator and used for comparing the pressure signal with the reference high pressure and generating a high pressure comparison result to output when the pressure signal is greater than the reference high pressure; comparing the pressure signal with the reference low pressure, and generating a low pressure comparison result to output when the pressure signal is smaller than the reference low pressure;
and the processor is connected with the second comparator and used for providing the reference high voltage and the reference low voltage for the second comparator and generating the high-voltage alarm signal according to the high-voltage comparison result fed back by the second comparator or generating the low-voltage alarm signal according to the low-voltage comparison result fed back by the second comparator.
Optionally, the operating voltage providing module includes: the circuit comprises a first resistor, a first capacitor, a second capacitor and a first diode, wherein one end of the first resistor is connected to a first power supply voltage, the other end of the first resistor is connected to one end of the first capacitor, is simultaneously connected to the cathode end of the first diode and is connected to one end of the second capacitor, the other end of the first capacitor is connected to the anode end of the first diode and is simultaneously connected to the other end of the second capacitor, one end of the second capacitor is used as the output end of the working voltage providing module, and the other end of the second capacitor is connected to a digital ground.
The invention also provides a pressure detection and display alarm system, which comprises:
the pressure detection and display alarm chip is described above;
the display module is connected with the data processing module and is used for carrying out digital display on the pressure signal;
and the alarm module is connected with the data processing module and is used for performing high-voltage alarm operation according to the high-voltage alarm signal or performing low-voltage alarm operation according to the low-voltage alarm signal.
Optionally, the display module performs digital display based on a nixie tube or L CD.
Optionally, the alarm module alarms based on at least one of a light emitting diode or a buzzer.
Optionally, the alarm module alarms based on the light emitting diode, wherein the alarm module includes: a second resistor, a third resistor, a fourth resistor, a first triode, a second diode, a third capacitor and a light emitting diode, wherein one end of the second resistor is connected to the data processing module to serve as an input end of the alarm module, the other end of the second resistor is connected to one end of the third resistor and is simultaneously connected to a base electrode of the first triode, the other end of the third resistor is connected to a digital ground, a collector electrode of the first triode is connected to a cathode end of the second diode, an emitter electrode of the first triode is connected to an anode end of the second diode and is simultaneously connected to an analog ground, a cathode end of the second diode is connected to one end of the third capacitor and is simultaneously connected to a cathode end of the third diode, and an anode end of the second diode is connected to the other end of the third capacitor, and the anode end of the light-emitting diode is connected with one end of a fourth resistor, and the other end of the fourth resistor is connected into a first power supply voltage.
Optionally, the system further includes an instrument panel display signal generating module, configured to generate an instrument panel display signal according to the electrical signal; wherein, the instrument panel display signal generating module comprises:
the PWM signal generator is connected to the electric signal generating module and used for converting the electric signal into a PWM signal to be output;
and the instrument panel display signal generator is connected with the PWM signal generator and is used for converting the PWM signal into an instrument panel display signal to be output.
Optionally, the dashboard display signal generator includes: a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a second triode, a voltage regulator, a fourth capacitor and a fourth diode, wherein one end of the fifth resistor is connected to the PWM signal generator to serve as an input end of the instrument panel display signal generator, the other end of the fifth resistor is connected to one end of the sixth resistor and is also connected to a base electrode of the second triode, the other end of the sixth resistor is connected to analog ground, a collector of the second triode is connected to one end of the seventh resistor and serves as an output end of the instrument panel display signal generator, and is also connected to a cathode end of the voltage regulator, one end of the fourth capacitor and a cathode end of the fourth diode, an emitter of the second triode is connected to an anode end of the voltage regulator and the other end of the fourth capacitor, and the other end of the seventh resistor is connected to one end of the eighth resistor, the other end of the eighth resistor is connected to a second power supply voltage, and the anode of the fourth diode is connected to the digital ground.
Optionally, the display module further displays based on a dashboard.
As described above, the pressure detection and display alarm chip and system of the present invention have the following beneficial effects:
the pressure detection and display alarm chip quickly and accurately acquires a pressure signal through the electric signal generation module and the data processing module, and directly generates a high-pressure alarm signal or a low-pressure alarm signal to output when the pressure signal is higher than a reference high pressure or lower than a reference low pressure; the pressure detection and display alarm chip can generate a pressure signal and an alarm signal without being matched with a peripheral circuit; therefore, the chip disclosed by the invention not only realizes function diversification, but also greatly reduces the circuit complexity.
The pressure detection and display alarm system provided by the invention is convenient for a user to check by visually displaying the pressure information to the user in a digital form, and is convenient for the user to find the oil pressure condition and increase or extract engine oil in time; more through sending the suggestion of reporting to the police when too high or the oil pressure is low at the oil pressure to and remind the user in time, engine oil spills over from the seal opening when preventing the oil pressure too high, causes oil cleaner to damage, thereby makes engine oil get into combustion chamber burning production a large amount of carbon deposits and blocks up the pipeline, or prevents that the oil pressure from causing lubrication badly when low excessively, accelerates the wearing and tearing of bent axle, piston, connecting rod and cylinder liner.
Drawings
Fig. 1 is a block diagram of a pressure detection and display alarm chip according to an embodiment of the present invention.
Fig. 2 is a specific circuit diagram of the operating voltage providing module according to an embodiment of the invention.
Fig. 3 is a block diagram of a pressure detecting and displaying alarm system according to a second embodiment of the present invention.
Fig. 4 is a specific circuit diagram of the pressure detecting and displaying alarm system according to the second embodiment of the present invention.
Description of the element reference numerals
10 pressure detection and display alarm chip
11 electric signal generating module
111 pressure sensor
112 temperature compensation unit
1121 temperature sensor
1122 first comparator
1123 controller
113 amplifying unit
12 data processing module
121 pressure signal generator
122 second comparator
123 processor
13 working voltage supply module
20 display module
21 nixie tube or L CD
22 instrument panel
30 alarm module
40 instrument panel display signal generating module
41 PWM signal generator
42 instrument panel display signal generator
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Please refer to fig. 1 to 4. It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
Example one
As shown in fig. 1, the present embodiment provides a pressure detecting and displaying alarm chip 10, which includes:
the electric signal generating module 11 is used for collecting the pressure of the sample to be detected so as to convert the collected pressure into an electric signal;
the data processing module 12 is connected to the electrical signal generating module 11, and is configured to convert the electrical signal into a pressure signal, generate a high-pressure alarm signal when the pressure signal is greater than a reference high pressure, and generate a low-pressure alarm signal when the pressure signal is less than a reference low pressure;
and the working voltage providing module 13 is connected to the data processing module 12 and is used for providing a working voltage VCC for the data processing module 12.
As an example, as shown in fig. 1, the electric signal generating module 11 includes: and the pressure sensor 111 is used for collecting the pressure of the sample to be detected so as to convert the collected pressure into an electric signal. Specifically, the pressure sensor 111 includes a piezoresistive sensor; optionally, in this embodiment, a piezoresistive sensor with high precision and low power consumption is selected to achieve high precision and low power consumption in pressure detection. It should be noted that, when the pressure sensor 111 is used to detect the oil pressure in the oil tank of the automobile, the pressure sensor 111 is mounted on the side wall near the bottom in the oil tank of the automobile.
As an example, as shown in fig. 1, the electrical signal generating module 11 further includes: and a temperature compensation unit 112 for detecting a temperature of the sample to be measured and comparing the detected temperature with a reference temperature to perform temperature compensation on the electrical signal based on the comparison result. In this embodiment, temperature compensation is implemented by using a linear relationship between the temperature of the pressure sensor and the electrical parameter thereof, for example, in this embodiment, the temperature of the piezoresistive sensor and the resistance value thereof are in a linear relationship, a difference between the detected temperature and the reference temperature is calculated to obtain a temperature variation of the piezoresistive sensor, so as to obtain a resistance value variation of the piezoresistive sensor, and the temperature compensation of the piezoresistive sensor is implemented by increasing or decreasing the resistance value variation on the basis of the resistance value corresponding to the reference temperature. It is noted that the reference temperature is typically a normal temperature, such as 25 ℃.
Specifically, as shown in fig. 1, the temperature compensation unit 112 includes:
the temperature sensor 1121 is used for detecting the temperature of the sample to be detected;
a first comparator 1122 connected to the temperature sensor 1121, and configured to compare the detected temperature with the reference temperature and output a comparison result;
a controller 1123, connected to the first comparator 1122, for providing the reference temperature to the first comparator 1122 and performing temperature compensation on the electrical signal based on the comparison result.
As an example, as shown in fig. 1, the electrical signal generating module 11 further includes: and an amplifying unit 113 connected to the pressure sensor 111, for amplifying the electrical signal and outputting the amplified electrical signal.
Optionally, in this embodiment, the electrical signal generating module 11 includes a sensor signal conditioning chip (e.g., an NSA2300 chip) externally connected with a pressure sensor, wherein the electrical signal generating module 11 further includes a fifth capacitor C5, a sixth capacitor C6, and a ninth resistor R9, and a specific connection relationship is as shown in fig. 4. It should be noted that the sensor signal conditioning chip (e.g., NSA2300 chip) is internally integrated with a temperature sensor 1121, a first comparator 1122, a controller 1123, and an amplifying unit 113; in practice, the electrical signal generating module 11 is usually integrated into a unit module so as to be mounted on the side wall of the vehicle fuel tank near the bottom.
As an example, as shown in fig. 1, the data processing module 12 includes:
a pressure signal generator 121 connected to the electrical signal generating module 11, for converting the electrical signal into a pressure signal to output;
a second comparator 122, connected to the pressure signal generator 121, for comparing the pressure signal with the reference high pressure, and generating a high pressure comparison result for outputting when the pressure signal is greater than the reference high pressure; comparing the pressure signal with the reference low pressure, and generating a low pressure comparison result to output when the pressure signal is smaller than the reference low pressure;
and the processor 123 is connected to the second comparator 122, and configured to provide the reference high voltage and the reference low voltage to the second comparator 122, and generate the high-voltage alarm signal according to the high-voltage comparison result fed back by the second comparator 122, or generate the low-voltage alarm signal according to the low-voltage comparison result fed back by the second comparator.
Specifically, the pressure signal generator 121 performs a/D conversion on the electrical signal, and then converts the electrical signal into a pressure signal; optionally, in order to improve the detection accuracy, the pressure signal is an average value of a plurality of pressure signals. Optionally, in this embodiment, the data processing module 12 includes a single chip, wherein the single chip is integrated with a pressure signal generator 121, a second comparator 122, and a processor 123.
As an example, as shown in fig. 2, the operating voltage providing module 13 includes: a first resistor R1, a first capacitor C1, a second capacitor C2 and a first diode D1, wherein one end of the first resistor R1 is connected to a first power voltage VDD1, the other end of the first resistor R1 is connected to one end of the first capacitor C1, and is also connected to the cathode of the first diode D1 and to one end of the second capacitor C2, the other end of the first capacitor C1 is connected to the anode of the first diode D1 and is also connected to the other end of the second capacitor C2, one end of the second capacitor C2 serves as the output end of the operating voltage providing module 13, and the other end of the second capacitor C2 is connected to a digital ground.
Example two
As shown in fig. 3, the present embodiment provides a pressure detection and display alarm system, which includes:
the pressure detection and display alarm chip 10 according to the first embodiment;
the display module 20 is connected to the data processing module 12 and is used for digitally displaying the pressure signal;
and the alarm module 30 is connected to the data processing module 12 and is used for performing high-voltage alarm operation according to the high-voltage alarm signal or performing low-voltage alarm operation according to the low-voltage alarm signal.
As shown in FIG. 3, the display module 20 displays data based on a digital tube or L CD to realize digital display for the user to directly read the data.
As an example, as shown in fig. 3, the display module 300 further performs display based on a dashboard to realize a pointer display. Specifically, as shown in fig. 3, the system further includes: an instrument panel display signal generating module 40, configured to generate the instrument panel display signal according to the electrical signal; wherein the instrument panel display signal generating module 40 includes:
a PWM signal generator 41 connected to the electrical signal generating module 11, for converting the electrical signal into a PWM signal to output;
and an instrument panel display signal generator 42, connected to the PWM signal generator 41, for converting the PWM signal into an instrument panel display signal for outputting, so as to facilitate the display module 20 to perform pointer display.
Optionally, in this embodiment, as shown in fig. 4, the PWM signal generator 41 is integrated in the single chip microcomputer; the instrument panel display signal generator 42 includes: a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a second triode Q3, a voltage regulator DZ, a fourth capacitor C4 and a fourth diode D4, wherein one end of the fifth resistor R5 is connected to the PWM signal generator 41 to serve as an input end of the instrument panel display signal generator 42, the other end of the fifth resistor R5 is connected to one end of the sixth resistor R6 and to a base of the second triode Q2, the other end of the sixth resistor R6 is connected to analog ground, a collector of the second triode Q2 is connected to one end of the seventh resistor R7 to serve as an output end of the instrument panel display signal generator 42, and to a cathode end of the voltage regulator DZ, one end of the fourth capacitor C4 and a cathode end of the fourth diode D4, an emitter of the second triode Q2 is connected to an anode end of the voltage regulator DZ and the other end of the fourth capacitor C4, the other end of the seventh resistor R7 is connected to one end of the eighth resistor R8, the other end of the eighth resistor R8 is connected to the second power voltage VDD2, and the anode of the fourth diode D4 is connected to the digital ground. As shown in fig. 2, when the PWM signal generator 41 outputs a PWM signal, the second transistor Q2 is turned on based on the PWM signal to form a conductive loop with the seventh resistor R7 and the eighth resistor R8, so as to generate the dashboard display signal for output.
As an example, as shown in fig. 3, the alarm module 30 alarms based on at least one of a light emitting diode or a buzzer. Optionally, in this embodiment, the alarm module 30 alarms based on the light emitting diode.
Specifically, as shown in fig. 4, the alarm module includes a second resistor R2, a third resistor R3, a fourth resistor R4, a first triode Q1, a second diode D1, a third capacitor C1, and a light emitting diode D1, wherein one end of the second resistor R1 is connected to the data processing module 12 to serve as an input terminal of the alarm module 30, the other end of the second resistor R1 is connected to one end of the third resistor R1 and to a base of the first triode Q1, the other end of the third resistor R1 is connected to a digital ground, a collector of the first triode Q1 is connected to a cathode of the second diode D1, an emitter of the first triode Q1 is connected to an anode of the second diode D1, and to an analog ground, a cathode of the second diode D1 is connected to one end of the third capacitor C1, and the other end of the third diode D1 is connected to a cathode of the high voltage power supply, and the third diode D1 is connected to the anode of the third diode D1, and the anode of the high voltage alarm module 1, and the third diode D1 is connected to the anode of the high voltage alarm module 1, and the anode of the third diode R1, so that the high voltage alarm module is connected to the high voltage alarm module 1 and the anode of the alarm module is connected to the third diode D1, and the high voltage alarm module 1, and the alarm module is connected to the anode of the third diode D1, and the anode of the high voltage processing module, and the high voltage alarm module 1, and the high voltage alarm module is connected to the anode of the high voltage alarm module 1, and the low voltage alarm module 1, and the low voltage circuit is connected to.
In summary, the pressure detection and display alarm chip and system of the present invention have the following beneficial effects: the pressure detection and display alarm chip quickly and accurately acquires a pressure signal through the electric signal generation module and the data processing module, and directly generates a high-pressure alarm signal or a low-pressure alarm signal to output when the pressure signal is higher than a reference high pressure or lower than a reference low pressure; the pressure detection and display alarm chip can generate a pressure signal and an alarm signal without being matched with a peripheral circuit; therefore, the chip disclosed by the invention not only realizes function diversification, but also greatly reduces the circuit complexity. The pressure detection and display alarm system provided by the invention is convenient for a user to check by visually displaying the pressure information to the user in a digital form, and is convenient for the user to find the oil pressure condition and increase or extract engine oil in time; more through sending the suggestion of reporting to the police when too high or the oil pressure is low at the oil pressure to and remind the user in time, engine oil spills over from the seal opening when preventing the oil pressure too high, causes oil cleaner to damage, thereby makes engine oil get into combustion chamber burning production a large amount of carbon deposits and blocks up the pipeline, or prevents that the oil pressure from causing lubrication badly when low excessively, accelerates the wearing and tearing of bent axle, piston, connecting rod and cylinder liner. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (15)
1. The utility model provides a pressure detection and warning display chip which characterized in that, the chip includes:
the electric signal generating module is used for collecting the pressure of the sample to be detected so as to convert the collected pressure into an electric signal;
the data processing module is connected with the electric signal generating module and used for converting the electric signal into a pressure signal, generating a high-pressure alarm signal when the pressure signal is greater than a reference high pressure and generating a low-pressure alarm signal when the pressure signal is less than a reference low pressure;
and the working voltage providing module is connected with the data processing module and is used for providing working voltage for the data processing module.
2. The pressure detecting and displaying alarm chip according to claim 1, wherein the electric signal generating module comprises: and the pressure sensor is used for collecting the pressure of the sample to be detected so as to convert the collected pressure into an electric signal.
3. The pressure detecting and displaying alarm chip of claim 2, wherein the electrical signal generating module further comprises: and the temperature compensation unit is used for detecting the temperature of the sample to be detected and comparing the detected temperature with the reference temperature so as to perform temperature compensation on the electric signal based on the comparison result.
4. The pressure detecting and displaying alarm chip according to claim 3, wherein the temperature compensating unit comprises:
the temperature sensor is used for detecting the temperature of the sample to be detected;
the first comparator is connected with the temperature sensor and used for comparing the detected temperature with the reference temperature and outputting a comparison result;
and the controller is connected with the first comparator and used for providing the reference temperature for the first comparator and carrying out temperature compensation on the electric signal based on the comparison result.
5. The pressure detecting and displaying alarm chip according to claim 2, 3 or 4, wherein said electric signal generating module further comprises: and the amplifying unit is connected with the pressure sensor and used for amplifying the electric signal and then outputting the electric signal.
6. The pressure detecting and displaying alarm chip of claim 2, wherein said pressure sensor comprises a piezoresistive sensor.
7. The pressure detection and display alarm chip according to claim 1, wherein the data processing module comprises:
the pressure signal generator is connected to the electric signal generating module and used for converting the electric signal into a pressure signal to be output;
the second comparator is connected with the pressure signal generator and used for comparing the pressure signal with the reference high pressure and generating a high pressure comparison result to output when the pressure signal is greater than the reference high pressure; comparing the pressure signal with the reference low pressure, and generating a low pressure comparison result to output when the pressure signal is smaller than the reference low pressure;
and the processor is connected with the second comparator and used for providing the reference high voltage and the reference low voltage for the second comparator and generating the high-voltage alarm signal according to the high-voltage comparison result fed back by the second comparator or generating the low-voltage alarm signal according to the low-voltage comparison result fed back by the second comparator.
8. The pressure detecting and displaying alarm chip according to claim 1, wherein the operating voltage providing module comprises: the circuit comprises a first resistor, a first capacitor, a second capacitor and a first diode, wherein one end of the first resistor is connected to a first power supply voltage, the other end of the first resistor is connected to one end of the first capacitor, is simultaneously connected to the cathode end of the first diode and is connected to one end of the second capacitor, the other end of the first capacitor is connected to the anode end of the first diode and is simultaneously connected to the other end of the second capacitor, one end of the second capacitor is used as the output end of the working voltage providing module, and the other end of the second capacitor is connected to a digital ground.
9. A pressure detection and display alarm system, the system comprising:
the pressure detection and display alarm chip of any one of claims 1 to 8;
the display module is connected with the data processing module and is used for carrying out digital display on the pressure signal;
and the alarm module is connected with the data processing module and is used for performing high-voltage alarm operation according to the high-voltage alarm signal or performing low-voltage alarm operation according to the low-voltage alarm signal.
10. The pressure detection and display alarm system according to claim 9, wherein the display module is based on digital tube or L CD for digital display.
11. The pressure detection and display alarm system of claim 9, wherein the alarm module alarms based on at least one of a light emitting diode or a buzzer.
12. The pressure detection and display alarm system according to claim 11, wherein the alarm module alarms based on the light emitting diode, wherein the alarm module comprises: a second resistor, a third resistor, a fourth resistor, a first triode, a second diode, a third capacitor and a light emitting diode, wherein one end of the second resistor is connected to the data processing module to serve as an input end of the alarm module, the other end of the second resistor is connected to one end of the third resistor and is simultaneously connected to a base electrode of the first triode, the other end of the third resistor is connected to a digital ground, a collector electrode of the first triode is connected to a cathode end of the second diode, an emitter electrode of the first triode is connected to an anode end of the second diode and is simultaneously connected to an analog ground, a cathode end of the second diode is connected to one end of the third capacitor and is simultaneously connected to a cathode end of the third diode, and an anode end of the second diode is connected to the other end of the third capacitor, and the anode end of the light-emitting diode is connected with one end of a fourth resistor, and the other end of the fourth resistor is connected into a first power supply voltage.
13. The pressure detection and display alarm system according to claim 9, further comprising a dashboard display signal generating module for generating a dashboard display signal based on the electrical signal; wherein, the instrument panel display signal generating module comprises:
the PWM signal generator is connected to the electric signal generating module and used for converting the electric signal into a PWM signal to be output;
and the instrument panel display signal generator is connected with the PWM signal generator and is used for converting the PWM signal into an instrument panel display signal to be output.
14. The pressure detection and display warning system of claim 13 wherein the instrument panel display signal generator comprises: a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a second triode, a voltage regulator, a fourth capacitor and a fourth diode, wherein one end of the fifth resistor is connected to the PWM signal generator to serve as an input end of the instrument panel display signal generator, the other end of the fifth resistor is connected to one end of the sixth resistor and is also connected to a base electrode of the second triode, the other end of the sixth resistor is connected to analog ground, a collector of the second triode is connected to one end of the seventh resistor and serves as an output end of the instrument panel display signal generator, and is also connected to a cathode end of the voltage regulator, one end of the fourth capacitor and a cathode end of the fourth diode, an emitter of the second triode is connected to an anode end of the voltage regulator and the other end of the fourth capacitor, and the other end of the seventh resistor is connected to one end of the eighth resistor, the other end of the eighth resistor is connected to a second power supply voltage, and the anode of the fourth diode is connected to the digital ground.
15. The pressure detection and display alarm system according to claim 13 or 14, wherein the display module further displays based on a dashboard.
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| CN201910004971.6A CN111397791A (en) | 2019-01-03 | 2019-01-03 | Pressure detection and display alarm chip and system |
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