CN103545915B - A kind of power-economizing method for microscope experiment system handheld operating means - Google Patents

Abstract

The invention discloses an energy-saving method for a hand-held operating device of a micro-experimental system, which comprises a low-voltage drop, no-jitter power switching circuit to automatically switch between a power adapter and a battery power supply; a detection method for a low-power battery voltage detection circuit; and microprocessing The operation method combining light sleep and deep sleep. On the basis of satisfying the functional requirements of the micro-experimental operation, the invention prolongs the battery life, prolongs the service time of the device, and improves the work efficiency and quality of scientific research personnel through the hardware design of low power consumption and the energy-saving method.

Description

An energy-saving method for a hand-held operating device of a micro-experiment system

technical field

The invention relates to the field of micro-experimental operation, in particular to an energy-saving method for a hand-held operating device of a micro-experimental system.

Background technique

Microinjection technology is one of the important technical means of modern bioengineering, and it is widely used in the field of cell engineering such as transgenic, test-tube baby and cloning. The micro-experimental operating system is a complete set of automation devices for micro-injection experiments. It applies automatic control, microelectronics, embedded, wireless communication and other technologies to micro-injection experiments, and is driven by hand-held operating devices and manipulators. The system realizes the automation and intelligence of microinjection experiments, which greatly improves the work efficiency and work quality of scientific researchers compared with traditional manual operations.

The handheld operating device is the man-machine interface of the micro-experiment system. The user sends commands to the manipulator drive system through the hand-held operating device. The drive system controls the three-axis manipulator to operate the cell probe, and displays the manipulator's work in real time through the LCD display. State and parameters, so as to truly realize the automation and intelligence of microscopic experiments.

The handheld operating device is powered by batteries. With the continuous improvement of the functional requirements of the handheld operating device for the microscopic experiment system, the power consumption of the handheld device is also increasing. How to design a handheld operating device with stable performance and low power consumption has become a One of the difficulties in handheld device development. The low-power hardware design and energy-saving method can ensure the longest possible standby time, which not only reduces the inconvenience caused by frequent charging for normal use, but also prolongs the battery life.

Therefore, there is an urgent need for an energy-saving method for a hand-held operating device of a microscopic experiment system to solve the above problems.

Contents of the invention

In order to meet the functional requirements of the man-machine interface of the micro-experiment system, reduce the loss of the power supply battery, increase the service time of the device, and prolong the battery life, the invention provides an energy-saving method for the hand-held operating device of the micro-experiment system.

An energy-saving method for a hand-held operating device of a microscopic experiment system, comprising a low-voltage-drop, jitter-free power switching circuit to automatically switch between a power adapter and a battery; a low-power battery voltage detection circuit and method; and microprocessor light sleep, deep The operation method combined with sleep;

The low-drop, jitter-free power switching circuit includes a microprocessor reset chip U1, a PMOS transistor and a rectifier diode; pin 1 of the microprocessor reset chip U1 is coupled to the system reference ground, and pin 2 is coupled to the PMOS The gate of the transistor, pin 3 is coupled to the output of the power adapter; the drain of the PMOS transistor is coupled to the positive pole of the battery, and the source is coupled to the system load; the anode of the rectifier diode is coupled to the output of the power adapter, and the cathode is coupled to the load ; After the low-drop, jitter-free power switching circuit detects and waits for the output voltage of the power adapter to stabilize, it automatically switches the power supply from the battery to the adapter;

The low power consumption battery voltage detection circuit includes a first resistor and a second resistor; the first end of the first resistor is coupled to the positive pole of the battery, and the first end of the second resistor is coupled to the general output pin of the microprocessor , the second end of the first resistor and the second resistor are coupled to the input pin of the microprocessor analog/digital converter; when the battery voltage needs to be detected, the general output of the microprocessor coupled to the first end of the second resistor The pin is switched to the output mode and outputs a low level, and the microprocessor obtains the battery voltage through the input pin of the analog/digital converter coupled to the second end of the first resistor and the second resistor; when the battery voltage does not need to be detected, The general-purpose output pin of the microprocessor coupled to the first end of the second resistor is switched to a high-impedance mode;

The microprocessor light sleep mode is the normal working mode of the microprocessor, that is, the peripherals of the microprocessor work, the core is dormant, and the core is woken up periodically, and enters the light sleep mode again after executing a short-term monitoring program; the handheld operation When the duration of the device not receiving user operations exceeds the preset value, the microprocessor enters the deep sleep mode in which the peripherals and the core sleep at the same time, and the user wakes up by pressing a button to return to the light sleep mode.

The beneficial effect of the present invention is that: on the basis of satisfying the functional requirements of the microscopic experiment operation, the present invention reduces the loss of the power supply battery through the hardware design of low power consumption and the energy-saving method, prolongs the life of the battery, and increases the service time of the device. Improve the work efficiency and quality of scientific research personnel.

Description of drawings

Fig. 1 is the structural block diagram of the micro-experiment hand-held operating device of energy-saving method of the present invention;

FIG. 2 is a structural diagram of a switching circuit for a low-voltage dropout and jitter-free power supply provided by an embodiment of the present invention;

FIG. 3 is a structural diagram of a low-power simple battery voltage detection circuit provided by an embodiment of the present invention;

Fig. 4 is a flowchart of a low-power simple battery voltage detection method provided by an embodiment of the present invention;

Fig. 5 is a flowchart of the main program of energy-saving operation of the microprocessor provided by the embodiment of the present invention;

FIG. 6 is a flow chart of the microprocessor wake-up interrupt service program provided by the embodiment of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

Fig. 1 is a structural block diagram of a hand-held operating device for micro-experiments using the energy-saving method of the present invention. The peripheral circuit mainly includes LCD display screen, photoelectric encoder and buttons for controlling the movement of the manipulator, and wireless communication module. The microprocessor controls the peripheral circuit through the peripheral interface to complete the man-machine interface task of the handheld operation device. A low-dropout, jitter-free power switching circuit is used to switch the system power supply according to the connection of the power adapter. The power consumption of the microprocessor core, peripherals and peripheral circuits is managed through the operation method of deep sleep and light sleep mode, so as to realize the low power consumption requirement of the handheld operation device. The low power consumption battery voltage detection circuit combines the low power consumption battery voltage detection method to realize the low power consumption battery voltage detection.

FIG. 2 is a structural diagram of a low-drop, jitter-free power switching circuit provided by an embodiment of the present invention, and the circuit is used to switch the power supply of the system according to the connection status of the power adapter. In a specific embodiment, the model of the PMOS transistor is AO3401, and the model of the microprocessor reset chip U1 is IMP809L.

When the adapter is connected to the handheld operating device, the microprocessor resets the chip U1 to detect the output voltage, and after waiting for it to be stable, U1 turns off the PMOS transistor through pin 2 coupled to the gate of the PMOS transistor to achieve no jitter in the power supply Switch to the adapter to extend the battery life; when the adapter is not connected to the handheld operating device, the system is powered by the battery, the PMOS transistor is turned on, and the voltage drop of the battery through the PMOS transistor is extremely low to achieve low power consumption.

Fig. 3 is a structure diagram of a low-power simple battery voltage detection circuit provided by an embodiment of the present invention. The first resistor and the second resistor form a voltage divider to match the analog/digital (hereinafter referred to as A/D) conversion of the microprocessor. Range and battery voltage range. Refer to Figure 4 for the flow chart of the low-power simple battery voltage detection method of the present invention. The main function is to switch the mode of the general-purpose output pin (hereinafter referred to as GPIO) so that the circuit forms a path only when the battery voltage needs to be detected, thereby reducing power consumption. Consumption starts at step 401 and ends at step 407:

Step 401: start;

Step 402: GPIO is configured as an output mode and outputs a low level;

Step 403: start A/D conversion;

Step 404: Wait for the A/D conversion to be completed, if the conversion is completed, enter step 405, otherwise return to step 404;

Step 405: digitally filter the conversion result, and calculate the battery voltage;

Step 406: GPIO is configured as high impedance mode;

Step 407: end.

Refer to Figure 5 for the flow chart of the energy-saving method using the combination of light sleep and deep sleep of the microprocessor of the present invention. In a specific embodiment, the microprocessor adopts STM32F103. The main function is that the microprocessor is in light sleep mode when normal, and the core sleep can reduce the power consumption of the microprocessor by 20%. It runs according to the monitoring program, periodically wakes up the core, executes a short monitoring program, and enters the light sleep mode again. If the user does not operate the device for a long time, when the count value of the idle counter is equal to the preset value, the microprocessor enters the deep sleep mode, and turns off the backlight and coding of the liquid crystal display (hereinafter referred to as LCD) that consumes more current in the device through the electronic switch. device. Start at step 501 and end at step 511:

Step 501: start;

Step 502: Configure the microprocessor to enter the light sleep mode;

Step 503: Wait for the periodic wake-up timer to overflow, if it overflows, enter step 304, otherwise return to step 303;

Step 504: wake up the microprocessor;

Step 505: Execute a short monitoring program;

Step 506: Determine whether the user has an operation command for the device, if so, go to step 508, otherwise go to step 507;

Step 507: The idle counter is incremented;

Step 508: The idle counter is reset, go to step 502;

Step 509: When judging whether the count value of the idle counter is equal to the preset value (i.e. overflow), if so, go to step 510, otherwise go to step 502;

Step 510: Turn off the LCD backlight and the power supply of the photoelectric encoder;

Step 511: configure the microprocessor to enter the deep sleep mode, and wait for the user to wake up.

After the microprocessor enters the deep sleep mode, the power consumption of the system is the lowest. When the user needs to use the device, the button is interrupted to wake up. The flowchart of the wake-up interrupt service program is shown in Figure 6. It starts at step 601 and ends at step 605:

Step 601: start;

Step 602: Microprocessor initialization;

Step 603: Wait for the initialization of the microprocessor to be completed, if completed, then enter step 604, otherwise return to step 603;

Step 604: Turn on the LCD backlight and the photoelectric encoder power switch;

Step 605: end;

The above-described embodiments are only preferred specific implementations of the present invention, and ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims (1)

1. An energy-saving method for a micro-experimental system handheld operating device, characterized in that it includes low-voltage drop, no-jitter power switching circuit to automatically switch power adapter and battery power supply; low power consumption battery voltage detection circuit and method; and micro The operation method combining light sleep and deep sleep of the processor; The low-voltage-drop, jitter-free power switching circuit includes an IMP809L microprocessor reset chip U1, a PMOS transistor and a rectifier diode; pin 1 of the IMP809L microprocessor reset chip U1 is coupled to the system reference ground, and pin 2 is coupled to the The gate of the PMOS transistor, pin 3 is coupled to the output of the power adapter; the drain of the PMOS transistor is coupled to the positive pole of the battery, and the source is coupled to the system load; the anode of the rectifier diode is coupled to the output of the power adapter, and the cathode is coupled to to the load; the low-drop, jitter-free power switching circuit detects and waits for the output voltage of the power adapter to stabilize, then automatically switches the power supply from the battery to the adapter; The low power consumption battery voltage detection circuit includes a first resistor and a second resistor; the first end of the first resistor is coupled to the positive pole of the battery, and the first end of the second resistor is coupled to the general output pin of the microprocessor , the second end of the first resistor and the second resistor are coupled to the input pin of the microprocessor analog/digital converter; when the battery voltage needs to be detected, the general output of the microprocessor coupled to the first end of the second resistor The pin is switched to the output mode and outputs a low level, and the microprocessor obtains the battery voltage through the input pin of the analog/digital converter coupled to the second end of the first resistor and the second resistor; when the battery voltage does not need to be detected, The general-purpose output pin of the microprocessor coupled to the first end of the second resistor is switched to a high-impedance mode; The microprocessor light sleep mode is the normal working mode of the microprocessor, that is, the peripherals of the microprocessor work, the core is dormant, and the core is woken up periodically, and enters the light sleep mode again after executing a short-term monitoring program; the handheld operation When the duration of the device not receiving user operations exceeds the preset value, the microprocessor enters the deep sleep mode in which the peripherals and the core sleep at the same time, and the user wakes up by pressing a button to return to the light sleep mode.