[swift]計算した回数のカウントとリセット

前提・実現したいこと

cntを正しく動作させたい

発生している問題・エラーメッセージ

cntでカウントしてそれに準じて処理を行なっているのですが
なぜか動作がおかしく、cntを表示させると値がおかしくて困っています

該当のソースコード

 import UIKit
import CoreMotion
import AudioToolbox
import AVFoundation

class ViewController: UIViewController {
    let motionManager = CMMotionManager()
    var dataX:[Double] = []
    var dataY:[Double] = []
    var dataZ:[Double] = []
    var deviY = [Double](repeating: 0.0, count: 15000)
    var dispY = [Double](repeating: 0.0, count: 15000)
    var btn = false
    weak var timer: Timer!
    var startTime = Date()
    var totalTime = 0.0
    var cnt:Int = 0
    var alertY = true

    @IBOutlet weak var timeL: UILabel!
    @IBOutlet weak var accelX: UILabel!
    @IBOutlet weak var accelY: UILabel!
    @IBOutlet weak var accelZ: UILabel!

    @IBOutlet weak var kakuninL: UILabel!

//    計測開始・停止ボタン
    @IBAction func startB(_ sender: Any) {
        let button = sender as! UIButton

        if (btn == true) {
            btn = false
            cnt = 0
            deviY = [Double](repeating: 0.0, count: 15000)
            dispY = [Double](repeating: 0.0, count: 15000)
            button.setTitle("計測開始", for: .normal)
            stopTimer()
        }
        else {
            btn = true
            button.setTitle("計測停止", for: .normal)
            startTimer()
            cnt = 0
        }
    }

    @IBAction func resetB(_ sender: Any) {
        cnt = 0
        deviY = [Double](repeating: 0.0, count: 15000)
        dispY = [Double](repeating: 0.0, count: 15000)
        resetTimer()
        stopTimer()
    }


//    データの格納
    func outputAccelData(acceleration: CMAcceleration){
        if (btn) {
            dataX.append(acceleration.x)
            dataY.append(acceleration.y)
            dataZ.append(acceleration.z)

            accelX.text = String(format: "x = %.3f", acceleration.x)
            accelY.text = String(format: "y = %.3f", acceleration.y)
            accelZ.text = String(format: "z = %.3f", acceleration.z)
            culculator()
        }
    }

//    データの計算
    func culculator() {
        var tmpy:Double = 0.0

        if(dataY.count > 10) {
            for i in 0 ..< (dataY.count - 11) {
                for j in i ..< (i + 10) {
                    tmpy =  tmpy + dataY[j]
                }
                tmpy = tmpy / 10.0

                for k in i ..< (i + 10) {
                    dispY[i] = dispY[i] + pow(dataY[k]-tmpy,2.0)
                }
                dispY[i] = dispY[i] / 10.0
                deviY[i] = sqrt(dispY[i])

                if(judgecount(deviY[i])){
                    cnt = cnt + 1
                }
            }

        }
    }

//    動作の判定
    func judgecount(_ devi:Double) -> Bool {
        var soundIdRing:SystemSoundID = 1005
        kakuninL.text = String(format: "%d", cnt)

        if((devi > 0.20)&&(cnt > 50)) {
            cnt = 0
            return false

        }
        else if((cnt == 100)&&(alertY)) {
            alertY = false
            let alert1 = UIAlertController(title: nil, message: nil, preferredStyle: .alert)
            alert1.title = "警告！"
            alert1.message = "1の方"
            alert1.addAction(
                UIAlertAction(
                    title: "OK",
                    style: .default,
                    handler: {(action) -> Void in
                        self.alertY = true
                }))
            self.present( alert1, animated: true, completion:nil)

            if let soundUrl = CFBundleCopyResourceURL(CFBundleGetMainBundle(), nil, nil, nil){
                AudioServicesCreateSystemSoundID(soundUrl, &soundIdRing)
                AudioServicesPlaySystemSound(soundIdRing)
            }

            return true

        }
        else if((cnt > 200)&&(alertY)) {
            alertY = false
            let alert2 = UIAlertController(title: nil, message: nil, preferredStyle: .alert)
            alert2.title = "警告！"
            alert2.message = "2の方"
            alert2.addAction(
                UIAlertAction(
                    title: "OK",
                    style: .default,
                    handler: {(action) -> Void in
                        self.cnt = 0
                        self.alertY = true
                }))
            self.present( alert2, animated: true, completion:nil)
            return false
        }
        else {
            return true

        }

    }

    //    アラートの表示
    func displayalert(_ message:String) {
        let alert = UIAlertController(title: nil, message: nil, preferredStyle: .alert)
        alert.title = "警告！"
        alert.message = message
        alert.addAction(
            UIAlertAction(
                title: "OK",
                style: .default,
                handler: {(action) -> Void in
                    self.startTimer()
                    self.alertY = true
        }))
        self.present( alert, animated: true, completion:nil)
    }

//    時間の表示
    func displayTime(_ time: TimeInterval) {
        let minute = (Int)(fmod((time/60), 60))
        let second = (Int)(fmod(time, 60))
        let msec = (Int)((time - floor(time))*100)

        timeL.text = String(format: "%02d : %02d : %02d", minute, second, msec)
    }

//    時間の計測
    @objc func timerCounter() {
        let currentTime = totalTime + Date().timeIntervalSince(startTime)

        displayTime(currentTime)
    }

//    タイマーのスタート
    func startTimer() {
        if timer != nil {
            timer.invalidate()
        }
        else {
            startTime = Date();
        }
        timer = Timer.scheduledTimer(
            timeInterval: 0.01,
            target: self,
            selector: #selector(self.timerCounter),
            userInfo: nil,
            repeats: true)
    }

//    タイマーの一時停止
    func stopTimer() {
        if timer != nil {
            totalTime = totalTime + Date().timeIntervalSince(startTime)
            timer.invalidate()
            timer = nil
        }
        displayTime(totalTime)
    }

//    タイマーのリセット
    func resetTimer() {
        startTime = Date();
        totalTime = 0.0
        displayTime(totalTime)
        startTimer()
    }

//    加速度取得停止
    func stopAccelerometer(){
        if (motionManager.isAccelerometerActive) {
            motionManager.stopAccelerometerUpdates()
        }
    }


    override func viewDidLoad() {
        super.viewDidLoad()
        if motionManager.isAccelerometerAvailable {
            motionManager.accelerometerUpdateInterval = 0.5
            motionManager.startAccelerometerUpdates(
                to: OperationQueue.current!,
                withHandler: {(accelData: CMAccelerometerData?, errorOC: Error?) in
                    self.outputAccelData(acceleration: accelData!.acceleration)
            })
        }
        UIApplication.shared.isIdleTimerDisabled = true
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
}