Error calibration circuit for therapeutic apparatus and cavity therapeutic apparatus

Abstract

The utility model discloses an error calibration circuit for a therapeutic instrument and a cavity therapeutic instrument. The error calibration circuit comprises an acquisition circuit, a voltage regulating circuit, a calibration circuit and a master control simulation acquisition circuit, the voltage regulation circuit is connected with the pressure sensor acquisition circuit and the calibration circuit, the pressure sensor acquisition circuit is arranged on the inflation electrode control module, and the master control simulation acquisition circuit is connected with the calibration circuit; and the pressure sensor acquisition circuit is used for acquiring a pressure signal of the inflatable electrode, converting the pressure signal into an acquisition voltage and transmitting the acquisition voltage to the calibration circuit. The acquisition circuit acquires a pressure signal of the inflatable electrode and converts the pressure signal into an acquisition voltage, the voltage regulating circuit regulates a calibration voltage and a reference voltage through a slide rheostat, the calibration circuit calculates the acquisition voltage, the calibration voltage and the reference voltage to obtain an output voltage, and the output voltage is output to the master control simulation acquisition circuit for processing to obtain an acquisition pressure value. And the collected pressure value and the actual pressure value can be kept consistent by finely adjusting the sliding resistor during actual delivery.

Description

TECHNICAL FIELD

[0001] The utility model relates to pressure detection technical field, especially relate to a error calibration circuit and cavity treatment appearance for treatment appearance. BACKGROUND

[0002] With the high -speed development of the era, people's aesthetic concept changes ceaselessly, in medical beauty, in addition to the plastic of facial and body appearance, more and more women begin to pay attention to the health of their private parts, and the plastic of private parts gradually becomes a new fashion pursued by the majority of women. At present, various private treatment instruments appear on the market, but many products do not have the functions of inflation and deflation. When performing pelvic floor treatment, if the vaginal electrode cannot be well attached to the vaginal wall, the patient will also be unable to perceive the current, and the electrode is easy to fall off and has many other problems. Therefore, using the private electrode with inflation to perform pelvic floor treatment can make the vaginal electrode inflation larger and deform, which can better fit the patient's vagina and help the patients with relaxation to solve the problem of "only one side has feeling" during treatment. In terms of the vagina, the inflation feeling is more sensitive than the electric stimulation. For patients who cannot contract the pelvic floor muscles, the treatment effect of using the "inflatable electrode" is more effective, softer and easier to force than the traditional electrode, which realizes more comprehensive pelvic floor rehabilitation. To ensure that the inflation electrode has a more comfortable experience and more comprehensive treatment, the accurate setting of air pressure is very important. However, the pressure sensor itself has offset error, sensitivity error, linear error and hysteresis error, which cannot be avoided. SUMMARY

[0003] The utility model discloses a kind of error calibration circuits and cavity treatment appearance for treatment appearance, to solve the problem of inaccurate air pressure value acquisition of prior art.

[0004] To achieve the above object, the error calibration circuit for treatment appearance provided by the utility model comprises: a pressure sensor acquisition circuit, a voltage regulating circuit, a calibration circuit and a main control analog acquisition circuit.

[0005] The voltage regulating circuit is connected to the pressure sensor acquisition circuit and the calibration circuit, the pressure sensor acquisition circuit is arranged on the inflatable electrode, and the main control analog acquisition circuit is connected to the calibration circuit.

[0006] The pressure sensor acquisition circuit is used to acquire the pressure signal of the inflatable electrode and convert the pressure signal into an acquisition voltage transmitted to the calibration circuit.

[0007] The voltage regulating circuit is used to output a reference voltage and a calibration voltage to the calibration circuit according to the resistance value of the sliding resistor.

[0008] The calibration circuit is configured to generate an output voltage according to the acquisition voltage, the reference voltage and the calibration voltage, and transmit the output voltage to the master analog acquisition circuit.

[0009] The master analog acquisition circuit is configured to convert the output voltage into an acquisition pressure value.

[0010] In an embodiment, the error calibration circuit for a therapeutic instrument further comprises an amplification circuit, wherein,

[0011] The amplification circuit is connected to the pressure sensor acquisition circuit and the calibration circuit.

[0012] The amplification circuit is configured to receive the acquisition voltage and amplify the acquisition voltage to obtain an amplified voltage, and transmit the amplified voltage to the calibration circuit.

[0013] In an embodiment, the error calibration circuit for a therapeutic instrument further comprises a follower circuit, wherein,

[0014] The follower circuit is connected to the calibration circuit and the amplification circuit.

[0015] The follower circuit is configured to receive the amplified voltage of the amplification circuit and impedance match the amplified voltage.

[0016] In an embodiment, the voltage regulation circuit is further configured to adjust the resistance value of the slide rheostat, change the reference voltage and the calibration voltage, and make the acquisition pressure value equal to the actual pressure value when the acquisition pressure value is not equal to the actual pressure value.

[0017] In an embodiment, the pressure sensor acquisition circuit comprises a pressure sensor, a first capacitor and a second capacitor.

[0018] A power supply end of the pressure sensor is connected to a first power supply, one end of the first capacitor and one end of the second capacitor, the other end of the first capacitor and the other end of the second capacitor are grounded, and a positive output end and a negative output end of the pressure sensor are connected to the calibration circuit.

[0019] In an embodiment, the amplification circuit comprises a first resistor, a second resistor, a third resistor, a third capacitor, a fourth capacitor, a fifth capacitor and a differential instrument amplifier.

[0020] One end of the first resistor is connected to the positive output end of the pressure sensor, the other end of the first resistor is connected to one end of the third capacitor, one end of the fourth capacitor and the positive input end of the differential instrument amplifier, one end of the second resistor is connected to the negative output end of the pressure sensor, the other end of the second resistor is connected to the other end of the fourth capacitor, one end of the fifth capacitor and the negative input end of the differential instrument amplifier, the other end of the third capacitor and the other end of the fifth capacitor are grounded, and the output end of the differential instrument amplifier is connected to the calibration circuit; one end of the third resistor is connected to the first gain end of the differential instrument amplifier, the other end of the third resistor is connected to the second gain end of the differential instrument amplifier, and the third gain end of the differential instrument amplifier is grounded.

[0021] In an embodiment, the following circuit comprises: a sixth capacitor, a fourth resistor, a first diode and a first operational amplifier;

[0022] One end of the fourth resistor is connected to the output end of the differential instrument amplifier, the other end of the fourth resistor is connected to one end of the sixth capacitor, the cathode of the first diode and the positive input end of the first operational amplifier, the other end of the sixth capacitor and the anode of the first diode are grounded, and the negative input end of the first operational amplifier is connected to the output end of the first operational amplifier and the calibration circuit.

[0023] In an embodiment, the voltage regulating circuit comprises: a fifth resistor, a sixth resistor, a slide rheostat, a seventh capacitor, an eighth capacitor, a second operational amplifier and a third operational amplifier;

[0024] One end of the fifth resistor is connected to the second power supply and one end of the sixth resistor, the other end of the fifth resistor is connected to one fixed end of the slide rheostat, one end of the seventh capacitor and the positive input end of the second operational amplifier, the other end of the sixth resistor is connected to the other fixed end of the slide rheostat, one end of the eighth capacitor and the positive input end of the third operational amplifier, the other end of the seventh capacitor and the other end of the eighth capacitor are grounded, the negative input end of the second operational amplifier is connected to the output end of the second operational amplifier and the calibration circuit, and the negative input end of the third operational amplifier is connected to the output end of the third operational amplifier and the calibration circuit.

[0025] In an embodiment, the calibration circuit comprises: a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor and a fourth operational amplifier;

[0026] One end of the seventh resistor is connected to the output end of the third operational amplifier, the other end of the seventh resistor is connected to one end of the ninth capacitor, the negative input end of the fourth operational amplifier, one end of the tenth capacitor and one end of the eighth resistor, the other end of the tenth capacitor and the other end of the eighth resistor are connected to the output end of the fourth operational amplifier and one end of the ninth resistor, the other end of the ninth resistor is connected to one end of the eleventh capacitor and the main control analog acquisition circuit, one end of the tenth resistor is connected to the output end of the first operational amplifier, one end of the eleventh resistor is connected to the output end of the second operational amplifier, the other end of the tenth resistor and the other end of the eleventh resistor are connected to one end of the twelfth capacitor and the positive input end of the fourth operational amplifier, the other end of the ninth capacitor, the other end of the eleventh capacitor and the other end of the twelfth capacitor are grounded.

[0027] The utility model discloses still propose a cavity treatment appearance, the cavity treatment appearance includes the error calibration circuit for treatment appearance on as described above.

[0028] The utility model discloses a kind of error calibration circuit and cavity treatment appearance on treatment appearance, the error calibration circuit for treatment appearance on including: pressure sensor acquisition circuit, voltage regulating circuit, calibration circuit and main control analog acquisition circuit;The voltage regulating circuit is connected with the pressure sensor acquisition circuit and the calibration circuit, the pressure sensor acquisition circuit is arranged on inflatable electrode, the main control analog acquisition circuit is connected with the calibration circuit;The pressure sensor acquisition circuit is used to acquire the pressure signal of the inflatable electrode, and the pressure signal is converted into acquisition voltage transmission to the calibration circuit;The voltage regulating circuit is used to output reference voltage and calibration voltage to the calibration circuit according to the resistance value of slide rheostat;The calibration circuit is used to generate output voltage according to the acquisition voltage, the reference voltage and the calibration voltage, and the output voltage is transmitted to the main control analog acquisition circuit;The main control analog acquisition circuit is used to convert the output voltage into acquisition pressure value, and show to user.Pressure sensor acquisition circuit acquires the pressure signal of inflatable electrode and converts into acquisition voltage, voltage regulating circuit adjusts calibration voltage and reference voltage by slide rheostat, calibration circuit calculates acquisition voltage with calibration voltage and reference voltage, obtains output voltage and sends to main control analog acquisition circuit and processes to obtain acquisition pressure value, when actually leaving factory, acquisition pressure value and actual pressure value can be kept consistent by fine tuning slide rheostat, ensure that the setting pressure value of inflatable electrode is consistent with actual pressure value when treating. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below only constitute some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative labor.

[0030] Figure 1 The structural schematic diagram of the first embodiment of the error calibration circuit provided by the present application for a therapeutic instrument is provided.

[0031] Figure 2 The circuit schematic diagram of the second embodiment of the error calibration circuit provided by the present application for a therapeutic instrument is provided.

[0032] Figure 3 Another circuit schematic diagram of the second embodiment of the error calibration circuit provided by the present application for a therapeutic instrument is provided.

[0033] Figure 4 The circuit schematic diagram of the third embodiment of the error calibration circuit provided by the present application for a therapeutic instrument is provided.

[0034] Explanation of the reference signs:

[0035]

[0036] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments only constitute some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0038] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0039] In addition, if the description of "first", "second" and the like is involved in the embodiments of the utility model, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one feature. In addition, if "and / or" or "and / or" appears throughout the text, it means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, also not within the protection scope required by the utility model.

[0040] With the rapid development of the times, the aesthetic concept of people changes constantly, in addition to the plastic of facial and body appearance in medical aesthetics, more and more women begin to pay attention to the health of their private parts, and the plastic of private parts gradually becomes a new fashion pursued by the majority of women. At present, there are various private treatment instruments on the market, but many products do not have the inflation and deflation function. When the pelvic floor is treated, if the vaginal electrode cannot be well attached to the vaginal wall, the patient will also be unable to perceive the current, and the electrode is easy to fall off and many other problems. Therefore, using the private electrode with inflation for pelvic floor treatment can realize that the vaginal electrode is inflated and deformed, which can be more attached to the patient's vagina, help the patients with relaxation to solve the problem of "only one side has feeling" during treatment. In terms of vagina, the inflation feeling is more sensitive than electric stimulation. For those patients who cannot contract the pelvic floor muscles, the treatment effect of "inflatable electrode" is more effective than traditional electrode, which is softer, easier to force and realizes more comprehensive pelvic floor rehabilitation. In order to ensure that the inflation electrode has more comfortable experience and more comprehensive treatment, the accurate setting of air pressure is very important.

[0041] Because the pressure sensor itself has offset error, sensitivity error, linear error and hysteresis error, these four errors cannot be avoided, therefore, when the pressure sensor is collected, the error calibration circuit used in the therapeutic instrument is used to reduce the error as much as possible, the error calibration circuit used in the therapeutic instrument ensures the accuracy of air pressure collection, improves the collection accuracy, makes the collection pressure value of the inflation electrode consistent with the actual pressure value, and has far-reaching significance for improving the reliability of the product.

[0042] For example, Figure 1The utility model discloses a kind of error calibration circuit and therapeutic instrument for therapeutic instrument, the error calibration circuit for therapeutic instrument on the utility model includes: pressure sensor acquisition circuit 100, voltage regulating circuit 200, calibration circuit 300 and main control analog acquisition circuit 400;The voltage regulating circuit is connected the pressure sensor acquisition circuit and the calibration circuit, the pressure sensor acquisition circuit 100 is set on inflatable electrode 500, the main control analog acquisition circuit is connected the calibration circuit;The pressure sensor acquisition circuit 100 is used to acquire the pressure signal of the inflatable electrode, and the pressure signal is converted into acquisition voltage transmission to the calibration circuit;The voltage regulating circuit 200 is used to output reference voltage and calibration voltage to the calibration circuit according to the resistance value of slide rheostat;The calibration circuit 300 is used to generate output voltage according to the acquisition voltage, the reference voltage and the calibration voltage, and the output voltage is transmitted to the main control analog acquisition circuit;The main control analog acquisition circuit 400 is used to convert the output voltage into acquisition pressure value, and show to user.

[0043] It can be understood that the pressure sensor acquisition circuit 100 acquires the pressure signal of inflatable electrode 500, but because there is offset error, sensitivity error, linear error and hysteresis error in pressure sensor itself, the acquired pressure signal is inaccurate, greater than or less than actual pressure value, and needs to be calibrated by error calibration circuit on therapeutic instrument, the pressure sensor acquisition circuit of the application converts the pressure signal into acquisition voltage, the voltage regulating circuit 200 outputs reference voltage and calibration voltage according to the resistance value of slide rheostat, the calibration circuit subtracts reference voltage and adds calibration voltage from acquisition voltage, obtains output voltage, and the main control analog acquisition circuit converts the output voltage into acquisition pressure value, when acquisition pressure value is equal to actual pressure value, it proves that the calibration of the error calibration circuit for therapeutic instrument is accurate.Inflatable electrode 500 is inflated to inflatable electrode until acquisition pressure value is equal to set pressure value when treating, because the error calibration of the application is accurate, so set pressure value is equal to actual pressure value, and air pressure setting is accurate, and the treatment effect of inflatable electrode 500 is also ensured.

[0044] The voltage regulating circuit is also used for adjusting the resistance value of the slide rheostat when the acquisition pressure value is not equal to actual pressure value, changing the reference voltage and the calibration voltage, so that the acquisition pressure value is equal to actual pressure value.

[0045] It should be noted that when the collected pressure value is not equal to the actual pressure value, it proves that the calibration of the error calibration circuit on the therapeutic instrument has an error, and needs to be recalibrated, only by adjusting the slide rheostat of the voltage regulating circuit, the output voltage can be adjusted by changing the calibration voltage and the reference voltage, and then the collected pressure value is changed, when the collected pressure value is greater than the actual pressure value, the slide rheostat is adjusted, the reference voltage is increased, and the calibration voltage is reduced, when the collected pressure value is less than the actual pressure value, the slide rheostat is adjusted, the reference voltage is reduced, and the calibration voltage is increased.

[0046] In the embodiment, the pressure sensor acquisition circuit collects the pressure signal of the inflation electrode and converts it into a collected voltage, the voltage regulating circuit adjusts the calibration voltage and the reference voltage through the slide rheostat, the calibration circuit calculates the collected voltage, the calibration voltage and the reference voltage, obtains an output voltage, and sends the output voltage to the main control analog acquisition circuit for processing to obtain a collected pressure value, and when actually leaving the factory, the collected pressure value can be kept consistent with the actual pressure value by fine-tuning the slide rheostat, so that the set pressure value of the inflation electrode during treatment is consistent with the actual pressure value.

[0047] As shown in Figure 2 and Figure 3 , Figure 2 the circuit schematic diagram of the second embodiment of the error calibration circuit for the therapeutic instrument is provided, Figure 3 another circuit schematic diagram of the second embodiment of the error calibration circuit for the therapeutic instrument is provided.

[0048] Based on the first embodiment, the second embodiment of the error calibration circuit for the therapeutic instrument is provided.

[0049] The error calibration circuit for the therapeutic instrument further comprises an amplification circuit 700, wherein the amplification circuit is connected with the pressure sensor acquisition circuit and the calibration circuit; the amplification circuit is used for receiving the collected voltage and amplifying the collected voltage to obtain an amplified voltage transmitted to the calibration circuit.

[0050] It can be understood that the voltage value of the collected voltage output by the pressure sensor acquisition circuit 100 is small, and needs to be amplified by the amplification circuit 700, and the weak collected voltage is amplified by the amplification circuit to obtain an amplified voltage.

[0051] The error calibration circuit for the therapeutic instrument further comprises a follow-up circuit 600, wherein the follow-up circuit connects the calibration circuit and the amplified voltage; the follow-up circuit is used for anti-interference and voltage stabilization of the amplified voltage.

[0052] It should be noted that the follow-up circuit uses the characteristics of high input impedance and low output impedance of the operational amplifier to buffer and amplify the input amplified voltage (although the amplification factor is close to 1), while keeping the amplitude and phase of the signal unchanged.

[0053] The pressure sensor acquisition circuit 100 comprises a pressure sensor A, a first capacitor C1 and a second capacitor C2; the power supply end of the pressure sensor is connected with a first power supply VCC1, one end of the first capacitor C1 and one end of the second capacitor C2, the other end of the first capacitor and the other end of the second capacitor are grounded, and the positive output end and the negative output end of the pressure sensor A are connected with the calibration circuit 300.

[0054] It can be understood that the pressure sensor can sense the pressure signal of the inflatable electrode and convert the pressure signal into a useful output acquisition voltage. The pressure sensor adopts MPXM2053GS, has the characteristics of highly accurate, linear voltage output proportional to the applied pressure, on-chip temperature compensation and calibration function, laser precision trimming and offset span calibration. The capacity of the first capacitor is 10uF, and the capacity of the second capacitor is 0.1uF.

[0055] The amplification circuit 700 comprises a first resistor R1, a second resistor R2, a third resistor R3, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5 and a differential instrument amplifier B; one end of the first resistor R1 is connected with the positive output end of the pressure sensor, the other end of the first resistor R1 is connected with one end of the third capacitor C3, one end of the fourth capacitor C4 and the positive input end of the differential instrument amplifier, one end of the second resistor R2 is connected with the negative output end of the pressure sensor, the other end of the second resistor R2 is connected with the other end of the fourth capacitor C4, one end of the fifth capacitor C5 and the negative input end of the differential instrument amplifier, the other end of the third capacitor C3 and the other end of the fifth capacitor C5 are grounded, and the output end of the differential instrument amplifier is connected with the calibration circuit; one end of the third resistor R3 is connected with the first gain end 1 of the differential instrument amplifier, the other end of the third resistor R3 is connected with the second gain end 2 of the differential instrument amplifier, and the third gain end 3 of the differential instrument amplifier is grounded.

[0056] It can be understood that the differential instrument amplifier is AD623AR, which has high gain accuracy, low input bias current and voltage, wide input voltage range, single / dual power supply and other characteristics, and is widely used in medical equipment. The differential instrument amplifier has strong anti-interference performance and can suppress common mode noise. By measuring the differential signal, the differential instrument amplifier can improve the gain and signal-to-noise ratio of the circuit. The gain end of the differential instrument amplifier is set through an external resistance R3, and the gain range can reach 1 to 1000. The amplification factor is determined by R3, and R3 can also be set as a variable resistance to realize gain controllable amplification and meet the specific use of different scenes. The amplification factor = 1+100K / R3, and the resistance value of the third resistance R3 of the present application is 499Ω. The capacitor is used to filter the collected voltage, which can smooth the collected voltage and reduce the interference of alternating components.

[0057] The following circuit 600 includes a sixth capacitor C6, a fourth resistance R4, a first diode and a first operational amplifier; one end of the fourth resistance R4 is connected to the output end of the differential instrument amplifier, the other end of the fourth resistance R4 is connected to one end of the sixth capacitor C6, the cathode of the first diode and the positive input end of the first operational amplifier, the other end of the sixth capacitor C6 and the anode of the first diode are grounded, and the negative input end of the first operational amplifier is connected to the output end of the first operational amplifier and the calibration circuit.

[0058] It should be noted that the combination of the fourth resistance R4 and the sixth capacitor C6 can filter high-frequency noise and interference signals in the circuit through the internal capacitance component, and stabilize the amplified voltage output by the amplification circuit. The negative input end of the first operational amplifier is connected to the output end, so that the amplification factor is 1, and the amplified voltage VP is output to the calibration circuit. The first operational amplifier adopts LMC6482AIM.

[0059] Optionally, the first operational amplifier T1 can be replaced by a triode, and the pressure sensor acquisition circuit can be replaced by a single-ended operational amplifier IC.

[0060] The voltage regulating circuit 200 comprises a fifth resistor R5, a sixth resistor R6, a slide rheostat, a seventh capacitor C7, an eighth capacitor C8, a second operational amplifier T2 and a third operational amplifier T3; one end of the fifth resistor R5 is connected with a second power supply and one end of the sixth resistor R6, the other end of the fifth resistor R5 is connected with one fixed end of the slide rheostat, one end of the seventh capacitor C7 and a positive input end of the second operational amplifier, the other end of the sixth resistor R6 is connected with the other fixed end of the slide rheostat, one end of the eighth capacitor C8 and a positive input end of the third operational amplifier, the other end of the seventh capacitor C7 and the other end of the eighth capacitor C8 are grounded, a negative input end of the second operational amplifier is connected with an output end of the second operational amplifier and the calibration circuit, and a negative input end of the third operational amplifier is connected with an output end of the third operational amplifier and the calibration circuit.

[0061] It can be understood that, Figure 3 For the voltage regulating circuit 200, the fifth resistor R5, the sixth resistor R6, the slide rheostat C and the operational amplifier are designed as a 1:1 follower, so that the reference voltage VCC2 is output to the second operational amplifier T2 and the third operational amplifier T3 through the adjustable resistor C, because the negative input ends of the second operational amplifier T2 and the third operational amplifier T3 are connected with the output ends, so the output end of the second operational amplifier T2 is the voltage division of the fifth resistor R5 and one end and the control end of the slide rheostat C, and the output end of the third operational amplifier T3 is the voltage division of the sixth resistor R6 and the other end and the control end of the slide rheostat C. 上 下 It can be understood that,

[0062] It should be noted that the adjustable output of the operational amplifier output calibration voltage VREF and the reference voltage VSET can be realized by adjusting the slide rheostat C. The second operational amplifier T2 and the third operational amplifier T3 adopt LMC6482AIM. VREF=VCC2*R 上 / (R5+R 上 ), VSET=VCC2*R 下 / (R6+R 下 ), when the slide rheostat C is adjusted upwards, R 上 decreases, the calibration voltage VREF decreases, R 下 increases, and the reference voltage VSET increases; when the slide rheostat C is adjusted downwards, R 上 increases, the calibration voltage VREF increases, R 下 decreases, and the reference voltage VSET decreases.

[0063] ​In the embodiment, the pressure sensor A outputs corresponding weak acquisition voltage according to the acquired pressure signal, and then the differential instrument amplifier B is used for amplification, the weak acquisition voltage is amplified by differential amplification to obtain an amplified voltage, impedance matching is continued by the first operational amplifier T1 of the follow-up circuit, and the amplified voltage VP is output to the calibration circuit. The differential instrument amplifier has the characteristics of high precision, high stability and low noise, is suitable for the fields of measurement and detection, can inhibit common-mode noise, effectively resist interference, and improve the gain and signal-to-noise ratio of the circuit. The voltage output of the reference voltage VCC2 is adjusted by the adjustable resistor C through the 1:1 follower composed of the fifth resistor R5, the sixth resistor R6, the slide rheostat C and the operational amplifier, so that the output voltage values of the two operational amplifiers are equal to the voltage division values between the fifth resistor R5, the sixth resistor R6 and the slide rheostat C. By adjusting the slide rheostat C, the adjustable output of the operational amplifier output calibration voltage VREF and the reference voltage VSET can be realized.

[0064] As shown in Figure 4 , Figure 4 The third embodiment of the error calibration circuit for the therapeutic instrument is provided by the utility model.

[0065] Based on the first embodiment and / or the second embodiment, the third embodiment of the error calibration circuit for the therapeutic instrument is provided by the utility model.

[0066] The calibration circuit 300 comprises a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11, a twelfth capacitor C12 and a fourth operational amplifier T4. One end of the seventh resistor R7 is connected to the output end of the third operational amplifier, the other end of the seventh resistor R7 is connected to one end of the ninth capacitor C9, the negative input end of the fourth operational amplifier, one end of the tenth capacitor C10 and one end of the eighth resistor R8, the other end of the tenth capacitor C10 and the other end of the eighth resistor R8 are connected to the output end of the fourth operational amplifier and one end of the ninth resistor R9, the other end of the ninth resistor R9 is connected to one end of the eleventh capacitor C11 and the main control analog acquisition circuit, one end of the tenth resistor R10 is connected to the output end of the first operational amplifier, one end of the eleventh resistor R11 is connected to the output end of the second operational amplifier, the other end of the tenth resistor R10 and the other end of the eleventh resistor R11 are connected to one end of the twelfth capacitor C12 and the positive input end of the fourth operational amplifier, and the other end of the ninth capacitor C9, the other end of the eleventh capacitor C11 and the other end of the twelfth capacitor C12 are grounded.

[0067] It can be understood that the calibration circuit adopts a combination of subtraction and adder, and the main function of the subtraction operational amplifier is to calculate the difference of two or more input signals and output the result. Through ingenious circuit design and negative feedback mechanism, the subtraction operational amplifier can realize high-precision signal subtraction operation, and is widely used in analog circuits, signal processing and control systems and other fields. The functions of the subtraction and addition operational amplifiers in the case are as follows: signal subtraction: used to eliminate DC bias or perform differential amplification of signals. Sensor signal conditioning: eliminate compensation voltage in sensor signal conditioning.

[0068] It should be noted that, Figure 4 The negative feedback is set to 1:1, the calibration voltage VREF of the voltage regulating circuit 200 is added to the positive input terminal of the fourth operational amplifier, and the amplification voltage VP of the follower circuit forms an addition operation, the reference voltage VSET of the voltage regulating circuit 200 is added to the negative input terminal of the fourth operational amplifier T4 to form a subtraction operation, and finally the combination of subtraction and adder can obtain the output voltage VO: VO=VP-VSET+VREF. Finally, the voltage regulating circuit can be adjusted to flexibly calibrate the amplification voltage VP to a specified range, meeting the application requirements of high precision.

[0069] Specifically, using the subtraction and addition operational amplifier scheme, the negative input terminal of the fourth operational amplifier T4 is connected to VSET, the positive input terminal of the fourth operational amplifier T4 is connected to VP and VREF, and VO=VP-VSET+VREF; when the output voltage VO meets the requirements, the sliding resistor C of the voltage regulating circuit is in the middle position, VSET=VREF, VO=VP, and the voltage regulating circuit does not need to be adjusted; when the output voltage VO does not meet the requirements, the values of VSET and VREF can be changed by adjusting the control end of the sliding resistor C of the voltage regulating circuit, at this time VO=VP-VSET+VREF, and the value of VO is adjusted through the voltage regulating circuit.

[0070] Optionally, the requirements that the output voltage needs to meet are calculated from the actual pressure value and the acceptable pressure error range. The voltage value of VO is equal to the voltage value of P_AD, which are both output voltages.

[0071] The main control analog pressure sensor acquisition circuit receives the output voltage P_AD for calculation, converts the output voltage into an acquisition pressure value, and finally sends the acquisition pressure value to the human-computer interaction interface for display.

[0072] Optionally, the main control analog pressure sensor acquisition circuit can be replaced by a programmable logic device CPLD, FPGA, DSP, SOC chip, etc.

[0073] In the embodiment, the output voltage is calibrated to the measured value by fine tuning the slide rheostat of the voltage regulating circuit, the pressure acquisition accuracy and anti-interference ability are improved, the high reliability of the product is ensured, the design is simple, the stability is high, the use can be flexibly expanded, and the use scenarios are wide. The amplified voltage VP of the pressure sensor and the reference voltage VSET are subtracted, and the amplified voltage VP is subtracted from the calibration voltage VREF to obtain an output voltage P_AD, which is finally sent to a main control unit for processing and calculation to obtain an acquired pressure value. When actually leaving the factory, the fine tuning of the slide rheostat can realize that the acquired pressure value is consistent with the actual pressure value, so that the consistency of the set inflation pressure value and the actual pressure value of the inflation electrode during treatment is ensured.

[0074] The utility model further provides a cavity treatment appearance, the cavity treatment appearance includes error calibration circuit for treatment appearance on, the specific structure of error calibration circuit for treatment appearance on refers to the above -mentioned embodiment, because the cavity treatment appearance adopts all technical schemes of the above all embodiment, therefore at least have all beneficial effects brought by the technical scheme of the above -mentioned embodiment, do not repeat here.

[0075] The above is only an exemplary embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation made by the utility model specification and the attached drawings, or direct / indirect application in other related technical fields under the technical concept of the utility model is included in the patent protection range of the utility model.

Claims

1. An error calibration circuit for a therapeutic instrument, comprising: The error calibration circuit for the therapeutic instrument comprises a pressure sensor acquisition circuit, a voltage regulation circuit, a calibration circuit and a main control analog acquisition circuit; The voltage regulation circuit is connected with the pressure sensor acquisition circuit and the calibration circuit, the pressure sensor acquisition circuit is connected with the inflation electrode, and the main control analog acquisition circuit is connected with the calibration circuit; The pressure sensor acquisition circuit is used for acquiring the pressure signal of the inflation electrode and converting the pressure signal into an acquisition voltage to be transmitted to the calibration circuit; The voltage regulation circuit is used for outputting a reference voltage and a calibration voltage to the calibration circuit according to the resistance value of the slide rheostat; The calibration circuit is used for generating an output voltage according to the acquisition voltage, the reference voltage and the calibration voltage and transmitting the output voltage to the main control analog acquisition circuit; The main control analog acquisition circuit is used for converting the output voltage into an acquisition pressure value.

2. The error calibration circuit for a therapeutic instrument of claim 1, wherein, The error calibration circuit for the therapeutic instrument further comprises an amplification circuit, wherein The amplification circuit is connected with the pressure sensor acquisition circuit and the calibration circuit; The amplification circuit is used for receiving the acquisition voltage and amplifying the acquisition voltage to obtain an amplified voltage to be transmitted to the calibration circuit.

3. The error calibration circuit for a therapeutic instrument of claim 2, wherein, The error calibration circuit for the therapeutic instrument further comprises a follow-up circuit, wherein The follow-up circuit is connected with the calibration circuit and the amplification circuit; The follow-up circuit is used for receiving the amplified voltage of the amplification circuit and performing impedance matching on the amplified voltage.

4. The error calibration circuit for a therapeutic instrument of claim 1, wherein, The voltage regulation circuit is further used for adjusting the resistance value of the slide rheostat, changing the reference voltage and the calibration voltage and making the acquisition pressure value equal to the actual pressure value when the acquisition pressure value is not equal to the actual pressure value.

5. The error calibration circuit for a therapeutic instrument of claim 1, wherein, The pressure sensor acquisition circuit comprises a pressure sensor, a first capacitor and a second capacitor; The power supply end of the pressure sensor is connected with a first power supply, one end of the first capacitor and one end of the second capacitor, the other end of the first capacitor and the other end of the second capacitor are grounded, and the positive output end and the negative output end of the pressure sensor are connected with the calibration circuit.

6. The error calibration circuit for a therapeutic instrument of claim 2, wherein, The amplification circuit comprises a first resistor, a second resistor, a third resistor, a third capacitor, a fourth capacitor, a fifth capacitor and a differential instrument amplifier; One end of the first resistor is connected with the positive output end of the pressure sensor, the other end of the first resistor is connected with one end of the third capacitor, one end of the fourth capacitor and the positive input end of the differential instrument amplifier, one end of the second resistor is connected with the negative output end of the pressure sensor, the other end of the second resistor is connected with the other end of the fourth capacitor, one end of the fifth capacitor and the negative input end of the differential instrument amplifier, the other end of the third capacitor and the other end of the fifth capacitor are grounded, the output end of the differential instrument amplifier is connected with the calibration circuit, one end of the third resistor is connected with the first gain end of the differential instrument amplifier, the other end of the third resistor is connected with the second gain end of the differential instrument amplifier, and the third gain end of the differential instrument amplifier is grounded.

7. The error calibration circuit for a therapeutic instrument of claim 3, wherein, The following circuit comprises a sixth capacitor, a fourth resistor, a first diode and a first operational amplifier; One end of the fourth resistor is connected to the output terminal of the differential instrument amplifier, the other end of the fourth resistor is connected to one end of the sixth capacitor, the cathode of the first diode and the positive input terminal of the first operational amplifier, the other end of the sixth capacitor and the anode of the first diode are grounded, the negative input terminal of the first operational amplifier is connected to the output terminal of the first operational amplifier and the calibration circuit.

8. The error calibration circuit for a therapeutic instrument of claim 1, wherein, The voltage regulating circuit comprises a fifth resistor, a sixth resistor, a slide rheostat, a seventh capacitor, an eighth capacitor, a second operational amplifier and a third operational amplifier; One end of the fifth resistor is connected to the second power supply and one end of the sixth resistor, the other end of the fifth resistor is connected to one fixed end of the slide rheostat, one end of the seventh capacitor and the positive input terminal of the second operational amplifier, the other end of the sixth resistor is connected to the other fixed end of the slide rheostat, one end of the eighth capacitor and the positive input terminal of the third operational amplifier, the other end of the seventh capacitor and the other end of the eighth capacitor are grounded, the negative input terminal of the second operational amplifier is connected to the output terminal of the second operational amplifier and the calibration circuit, the negative input terminal of the third operational amplifier is connected to the output terminal of the third operational amplifier and the calibration circuit.

9. The error calibration circuit for a therapeutic instrument of claim 8, wherein, The calibration circuit comprises a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor and a fourth operational amplifier; One end of the seventh resistor is connected to the output terminal of the third operational amplifier, the other end of the seventh resistor is connected to one end of the ninth capacitor, the negative input terminal of the fourth operational amplifier, one end of the tenth capacitor and one end of the eighth resistor, the other end of the tenth capacitor and the other end of the eighth resistor are connected to the output terminal of the fourth operational amplifier and one end of the ninth resistor, the other end of the ninth resistor is connected to one end of the eleventh capacitor and the master analog acquisition circuit, one end of the tenth resistor is connected to the output terminal of the first operational amplifier, one end of the eleventh resistor is connected to the output terminal of the second operational amplifier, the other end of the tenth resistor and the other end of the eleventh resistor are connected to one end of the twelfth capacitor and the positive input terminal of the fourth operational amplifier, the other end of the ninth capacitor, the other end of the eleventh capacitor and the other end of the twelfth capacitor are grounded.

10. A treatment apparatus for cavities, characterized in that it comprises: The cavity treatment instrument comprises the error calibration circuit for the treatment instrument according to any one of claims 1-9.

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