Application of digital integrated potentiometer matched with wireless remote controller in intelligent equipment

Abstract

The invention discloses an application of a digital integrated potentiometer matched with a wireless remote controller in intelligent equipment, which comprises a host shell of the intelligent equipment, and is characterized in that a sensor, a preamplifier, the digital potentiometer, the wireless remote controller, a data acquisition processor, a communication interface and a display are arranged in the host shell; and the digital potentiometer is matched with the wireless remote controller, replaces a mechanical potentiometer in the pre-amplification circuit, counts the resistance value by adding and subtracting, and automatically regulates and controls the output voltage. The digital potentiometer is matched with a wireless remote controller, and the amplification factor, the sensitivity, the gain and the measuring range of a host are adjusted by changing a resistance value in a non-contact dynamic adjustment mode in a data acquisition and processing circuit of sensor signals. The device has the characteristics of no contact, low noise and high adjustment precision, and has the advantages of no contact, no volatile and no disturbance. The method can be popularized and popularized to working condition scenes such as high temperature, radiation, chemical media and pollution which are inconvenient to approach, and remote regulation and control have important significance.

Description

Technical Field

[0001] The present invention discloses an application of a digital integrated potentiometer in combination with a wireless remote controller in intelligent equipment, which relates to the fields of microelectronics technology, automation equipment system engineering control, intelligent equipment, instrumentation detection, video and audio equipment, and also to remote control operations of high altitude, high temperature, and toxic gases in certain special environments, special mesons, and working conditions where it is inconvenient for humans to be present on site. Background Art

[0002] In the design of microelectronic automatic control equipment and intelligent equipment, preamplifier circuits and microcomputer data acquisition and processing circuits are often involved, and adjustable potentiometers are indispensable. However, most of the original technologies used mechanical knob potentiometers or mechanical straight slide push-pull potentiometers, and there are technical problems in practical applications. The following is an analysis based on the structural diagram of the mechanical potentiometer, please refer to Figure 3.

[0003] 1. Mechanical potentiometer is a manually adjustable variable resistor with a purely mechanical structure. It is adjusted by manual knob. When operating, it is repeatedly twisted back and forth with a screwdriver. Repeated sliding on the friction slide will reduce the elasticity of the spring, loosen it, and cause frequent changes in the resistance value, resulting in unstable resistance value.

[0004] 2. Wear of the contact friction plate causes a short circuit.

[0005] 3. Friction and wear of the slideway produce rolling noise.

[0006] 4. Frequent rotation of the knob causes the screws to loosen and shake, resulting in a decrease in accuracy and an increase in error.

[0007] The above problems directly or indirectly affect the gain, sensitivity, accuracy, error and range of the intelligent equipment host, resulting in great losses and reduced efficiency. Summary of the invention

[0008] Since the mechanical potentiometer is a manually adjustable variable resistor, in order to solve the technical deficiencies of the mechanical potentiometer mentioned above, we choose to use a digital integrated potentiometer instead.

[0009] The present invention provides a digital integrated potentiometer for use in intelligent equipment in conjunction with a wireless remote controller. Figure 1 , including: a host housing 1 of intelligent equipment, characterized in that: a sensor 2, a preamplifier 3, a digital potentiometer 4, a wireless remote controller 5, a data acquisition processor 6, a communication interface 7, and a display 8 are installed in the host housing 1. Please refer to Figure 2As shown in the figure, its working principle is: the sensor of the intelligent equipment changes to give an analog signal, which is received by the preamplifier circuit, collected and converted by the data acquisition processor circuit. In this process, the advantages of wireless remote control transmission and reception are brought into play: in a non-contact dynamic adjustment form, the resistance value of the digital potentiometer is changed according to a certain designed rule of addition and subtraction counting, so as to achieve the beneficial effect of adjusting the output voltage, sensitivity, gain, and range of the host. Please refer to Figure 2 shown.

[0010] A further solution of the present invention: We choose a digital potentiometer to replace the mechanical potentiometer because it is characterized by being a digitally controlled programmable resistor, an integrated circuit that processes mixed signals of digital and analog quantities. Because it has no contacts and no friction, and the regulation action relies on wireless and non-contact adjustment of the resistance value, it has low noise, no interference, and high regulation accuracy. These significant advantages are exactly what are applied to the design solution of the present invention.

[0011] A further solution of the present invention is that we pre-arrange the digital potentiometer and the wireless remote control Design, the transmitter and the receiver are paired one by one, coded and registered, and the numbers are placed in the right places without duplication or confusion to prevent external interference and misoperation. For the principle of coding control, please refer to Figure 6 As shown. Then the above controlled data is stored on the microcontroller bus. Due to the non-volatility of the digital potentiometer, the controlled data will not be lost or changed and will be permanently saved until the next adjustment. Figure 2 shown.

[0012] A further solution of the present invention is that the digital potentiometer cooperates with the wireless remote controller, and in the preamplifier circuit, when the wireless remote controller transmitter sends a signal, the receiver starts receiving and counting the resistance value of the digital potentiometer according to a certain designed rule, and the resistance value is changed to adjust the output voltage. Please refer to Figure 4.

[0013] A further solution of the present invention: Please refer to Figure 2 As shown, the digital potentiometer cooperates with the wireless remote control. In the data acquisition, conversion, and processor circuit of the sensor analog signal, when the wireless remote control transmitter sends a signal, the receiving end starts, and the resistance value of the digital potentiometer is added and subtracted according to a certain designed rule. The resistance value is changed in a non-contact dynamic adjustment form to achieve the adjustment of the accuracy, gain, sensitivity, error, and range of the intelligent equipment host. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Attached Figure 1 This is the application structure diagram of digital integrated potentiometer with wireless remote control in intelligent equipment.

[0015] Attached Figure 2 This is the schematic diagram of the digital potentiometer.

[0016] Attached Figure 3 Schematic diagram of a prior art mechanical potentiometer.

[0017] Attached Figure 4 This is the schematic diagram of the preamplifier.

[0018] Attached Figure 5 This is the pin function of the digital potentiometer.

[0019] Attached Figure 6 This is a schematic diagram of the coding of the wireless transmitter and receiver. DETAILED DESCRIPTION Example 1

[0020] First of all, the digital integrated potentiometer we selected is characterized by low voltage 5V power supply and current 3 mA. Its advantages of low voltage, low current and low power consumption are in line with the design and application of the present invention. Since the intelligent host equipment is often in the field operation site without power supply, this solution only needs to use a few dry batteries to supply power to the LCD display and meet the normal operation of the single-chip controller.

[0021] The working principle of the digital potentiometer pin is shown in Figure 4 :The 3rd, 5th and 6th pins of the digital potentiometer are adjustable resistance ends. When the S2 button is pressed, the 5th end moves upward and moves toward the 3rd end, thereby increasing the resistance. When the S1 button is pressed, the 5th end moves downward and moves toward the 6th end, thereby reducing the resistance. Each action of the button is controlled by the wireless remote controller. The unique non-volatility of the digital integrated potentiometer selected in the present invention is shown in Figure 4: It is characterized in that: the 1st, 2nd and 7th pins of the digital potentiometer are respectively connected to the switch key, and when the S3 button is pressed, the 7th pin is grounded, and the adjustment result is saved at the same time, and then the adjustment data of the S1 and S2 button actions are stored in the bus of the single-chip microcomputer. No matter whether the machine is turned off, turned on, powered off, or in a vibrating state, or how long it is placed, the data is saved for a hundred years without being lost until the next adjustment. Since the wireless remote controller can be remotely controlled outside the host housing, it is not necessary to disassemble the machine or open the cover for each adjustment, which will not affect the accuracy. This structural resistor is wear-free, which prolongs the service life and is stable and reliable. This is the advantage of the non-volatility of the digital integrated potentiometer selected in the present invention.

[0022] The digital integrated potentiometer used in the present invention is characterized by a small size, convenient welding design position, 32 sliding contacts and five adjustment gears, and can cooperate with a wireless remote controller to achieve remote control within twelve meters and adjust the resistance up and down, which is sufficient to meet the needs of fine adjustment. Example 2

[0023] The present invention selects a wireless remote control while selecting a digital potentiometer. The wireless remote control consists of two parts, including a transmitter and a receiver. The transmitter of the remote control is outside the host, and the receiver is connected to the digital potentiometer inside the host. In order to accurately control the circuit, we need to pair the transmitter with the receiver one-to-one during construction, give the code registration and control, please refer to Figure 6 As shown, it cannot be repeated or confused, so as to effectively prevent external interference.

[0024] For wireless remote control application example pin functions, please refer to Figure 5 As shown: when the transmitting end of the wireless remote control transmits a signal to the equipment host, the receiving end receives the information, and the 3rd, 5th and 6th pins of the digital potentiometer are connected as adjustable resistance ends, wherein the 5th pin is the sliding end of the resistor, and the sliding process from the 6th pin to the 3rd pin is the process of increasing the resistance value. When the receiving end receives the instruction, the button S2 is closed, so that the 5th pin moves upward along the slideway and moves toward the 3rd pin, and the resistance value increases more and more. On the contrary, when the wireless remote control transmitting end sends a signal, the S1 button is closed, driving the 5th pin to start sliding downward toward the 6th pin, and the resistance value decreases less and less. Each transmission and reception process is performed by the wireless remote control in conjunction with the digital potentiometer, and the addition and subtraction counting is performed according to a certain designed rule. By changing the resistance value, the output voltage, gain, sensitivity, range and error of the host equipment are adjusted to achieve a beneficial effect.

Claims

1. An application of a digital integrated potentiometer in combination with a wireless remote controller in intelligent equipment, comprising a host housing (1) of the intelligent equipment, characterized in that: A control circuit composed of a sensor (2), a preamplifier circuit (3), a digital potentiometer (4), a wireless remote controller (5), a data acquisition processor (6), a communication interface (7), and a display (8) is installed in a host housing (1).

2. The digital potentiometer (4) according to claim 1 cooperates with the wireless remote controller (5), and in the preamplifier circuit (3), the resistance value of the digital potentiometer is counted up and down according to a certain designed rule, and the output voltage is adjusted by changing the resistance value.

3. According to claim 1, the digital potentiometer (4) cooperates with the wireless remote control 5. In the analog signal data acquisition processor (6) circuit of the sensor (2), the resistance value of the digital potentiometer (4) is changed by adding and subtracting counts according to a certain designed rule in a non-contact dynamic adjustment form to adjust the host's amplification factor, sensitivity, gain, and range.

4. The digital potentiometer (4) according to claim 1, characterized in that Apply the non-volatility of the digital potentiometer: If you want to save the adjusted resistance value so that it will not be lost until the next time you adjust the resistance value, you must press the results of the buttons S1 and S2 once, and put the result of the resistance value adjustment on the microcontroller bus through the digital potentiometer button S3. As long as it is not actively adjusted, it can be saved permanently.

5. The wireless remote controller (5) according to claim 1 comprises: The remote control consists of a transmitter and a receiver. The transmitter of the remote control must be paired with the receiver one-to-one, given a coding design and control, which cannot be repeated or confused, to effectively prevent external interference and misoperation.

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